JP4830495B2 - Self-luminous display device, conversion table update device, and program - Google Patents

Description

The invention described in this specification relates to a technique for improving the calculation accuracy of a deterioration amount by actually measuring a change in deterioration characteristics with time.
The invention proposed by the inventors has aspects such as a self-luminous display device, a conversion table updating device, and a program.

Flat panel displays are widely used in products such as computer displays, portable terminals, and televisions. Currently, many liquid crystal display panels are mainly used. However, the narrow viewing angle and slow response speed continue to be pointed out.
On the other hand, an organic EL display formed of a self-luminous element can overcome the above-described viewing angle and responsiveness problems, and can achieve a thin form, high brightness, and high contrast that do not require a backlight. Therefore, it is expected as a next-generation display device that replaces the liquid crystal display.

By the way, it is generally known that organic EL elements and other self-light-emitting elements have a property of deteriorating depending on the light emission amount and the light emission time.
On the other hand, the content of the image displayed on the display is not uniform. For this reason, the deterioration of the self-luminous element is likely to proceed partially. For example, the self-light-emitting element in the time display area (fixed display area) progresses more rapidly than the self-light-emitting elements in other display areas (moving image display areas).
The luminance of the self-luminous element that has deteriorated is relatively lowered as compared with the luminance of other display areas. In general, this phenomenon is called “burn-in”. Hereinafter, partial deterioration of the self-luminous element is referred to as “burn-in”.

In addition, when a plurality of types of self-luminous elements are used for each basic emission color, or when a light-emitting element that can generate a plurality of types of basic emission colors is used, the deterioration characteristics of the respective emission colors often do not match.
In this case, in the “burn-in” portion, a phenomenon occurs in which the white balance is shifted and the color appears to be colored or dark.
For these reasons, methods for suppressing or improving the “burn-in” phenomenon have been studied. In particular, in the past, it has been considered most preferable to suppress the “burn-in” phenomenon of the screen by improving the light emission lifetime of the material constituting the light emitter.

  However, in the self-luminous display device, in principle, the burn-in cannot be reduced to 0 (zero) no matter how long the light emission lifetime of the material constituting the light emitter is extended. Further, the content of the video displayed on the self-luminous display device is various, and only a video signal in which “burn-in” is likely to occur may be input. That is, “burn-in” cannot be prevented only by improving the light emission lifetime of the material constituting the light emitter. In addition, such a method that depends on the light emission lifetime of the material constituting the light emitter has a problem that improvement of “burn-in” depends on the development speed and cost of the material.

Other than the method of improving the light emission lifetime of the material constituting the light emitter, Patent Document 1 and other improvement methods have been studied.
Patent Document 1 discloses an improvement method that accumulates the time during which the display panel emits light and suppresses the overall luminance according to the time. That is, in this improvement method, a technique for reducing the burn-in phenomenon by suppressing the deterioration rate of the light emission characteristics is disclosed.
JP 2000-356981 A

  However, the invention disclosed in the patent document merely extends the lifetime of the light emission time and cannot essentially correct the occurrence of the burn-in phenomenon.

Therefore, the inventors propose a mechanism that can effectively correct the burn-in phenomenon even when the deterioration characteristics fluctuate with time.
(A) Mechanism 1
Tone values that are used to calculate the unit deterioration amount of each pixel when dummy pixels corresponding to the number of matrices in the effective display area and detection sensors that detect the emission luminance of the dummy pixels are arranged outside the effective display area / As a mechanism for updating the deterioration characteristic conversion table, a mechanism for executing the following processing function or procedure is proposed.
(A) Matrix average gradation calculation processing for calculating the average gradation value in units of rows and the average gradation value in units of columns of the input display data corresponding to each display pixel in the effective display area (b) Measurement of luminance degradation Until the timing, M average gradation values calculated for each row are given to the dummy pixels corresponding to each row, while N average gradation values calculated for each column are assigned to the dummy pixels corresponding to each column. In the measurement timing of luminance degradation, dummy pixel data determination processing for giving a measurement gradation value to all dummy pixels (c) The average luminance of each emission luminance measured for each dummy pixel for the number of matrices Cumulative deterioration amount detection process for calculating and detecting the cumulative deterioration amount generated up to the time of measurement (d) Detecting by referring to the reference table in which the gradation value and the unit deterioration amount are associated with each size of the cumulative deterioration amount The table corresponding to the accumulated amount of deterioration Read Le values, table update processing for updating the tone value / degradation characteristics conversion table for the unit degradation amount calculation

(B) Mechanism 2
In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel As a mechanism for updating the gradation value / degradation characteristic conversion table referred to the calculation of the deterioration amount, a mechanism for executing the following processing function or procedure is proposed.
(A) Matrix average gradation calculation processing for calculating an average gradation value in units of rows and an average gradation value in units of columns corresponding to the dummy pixels in the input display data corresponding to each display pixel in the effective display area ( b) Until the measurement timing of luminance degradation, the average gradation value calculated for each row is given to the corresponding dummy pixel, while the average gradation value calculated for each column is given to the dummy pixel corresponding to each column. In the measurement timing of luminance degradation, dummy pixel data determination processing for giving a measurement gradation value to all the dummy pixels (c) The average luminance of each emission luminance measured for each dummy pixel is calculated, and until the measurement time point (D) Referring to a reference table in which gradation values and unit deterioration amounts are associated with each other according to the magnitude of the accumulated deterioration amount, the detected accumulated deterioration amount is calculated. Corresponding table Read, the table update processing for updating the tone value / degradation characteristics conversion table for the unit degradation amount calculation

(C) Mechanism 3
In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel As a mechanism for updating the gradation value / degradation characteristic conversion table referred to the calculation of the deterioration amount, a mechanism for executing the following processing function or procedure is proposed.
(A) Average gradation calculation processing for each block for calculating the average gradation value in units of row blocks and the average gradation value in units of column blocks of the input display data corresponding to each display pixel in the effective display area (b) Luminance degradation Until the measurement timing, the average gradation value calculated in units of row blocks is given to the dummy pixels corresponding to each block, while the average gradation value calculated in units of column blocks is assigned to the dummy pixels corresponding to each column block. In the measurement timing of luminance degradation, dummy pixel data determination processing for giving a measurement gradation value to all the dummy pixels (c) calculating an average luminance of each emission luminance measured for each dummy pixel, Cumulative degradation amount detection process for detecting the cumulative degradation amount that has occurred up to the time of measurement (d) Referring to a reference table in which gradation values and unit degradation amounts are associated with each size of the cumulative degradation amount, Read-out table value corresponding to the cumulative deterioration amount, table update processing for updating the tone value / degradation characteristics conversion table for the unit degradation amount calculation

(D) Mechanism 4
Tone values that are used to calculate the unit deterioration amount of each pixel when dummy pixels corresponding to the number of matrices in the effective display area and detection sensors that detect the emission luminance of the dummy pixels are arranged outside the effective display area / As a mechanism for updating the deterioration characteristic conversion table, a mechanism for executing the following processing function or procedure is proposed.
(A) Average gradation calculation processing for each block for calculating the average gradation value in units of row blocks and the average gradation value in units of column blocks of the input display data corresponding to each display pixel in the effective display area (b) Luminance degradation Until the measurement timing, the average gradation value calculated in units of row blocks is given to a plurality of dummy pixels corresponding to each block, while the average gradation value calculated in units of column blocks corresponds to each column block. The dummy pixel data determination process that gives the measurement gradation value to all the dummy pixels (c) was measured for each of the dummy pixels for the number of matrices. The average luminance of each light emission luminance is calculated, and the cumulative deterioration amount detection process for detecting the cumulative deterioration amount generated up to the time of measurement (d) The gradation value and the unit deterioration amount are associated with each size of the cumulative deterioration amount. Referring to irradiation table, the detected read a table value corresponding to the cumulative deterioration amount, table update processing for updating the tone value / degradation characteristics conversion table for the unit degradation amount calculation

(E) Mechanism 5
Tone values that are used to calculate the unit deterioration amount of each pixel when dummy pixels corresponding to the number of matrices in the effective display area and detection sensors that detect the emission luminance of the dummy pixels are arranged outside the effective display area / As a mechanism for updating the deterioration characteristic conversion table, a mechanism for executing the following processing function or procedure is proposed.
(A) Matrix average gradation calculation processing for calculating the average gradation value in units of rows and the average gradation value in units of columns of the input display data corresponding to each display pixel in the effective display area (b) Measurement of luminance degradation Until the timing, M average gradation values calculated for each row are given to the dummy pixels corresponding to each row, while N average gradation values calculated for each column are assigned to the dummy pixels corresponding to each column. In the measurement timing of luminance degradation, dummy pixel data determination processing for giving a measurement gradation value to all dummy pixels (c) The average luminance of each emission luminance measured for each dummy pixel for the number of matrices (D) Deterioration rate calculation process for calculating the deterioration rate within the measurement period based on the detected cumulative deterioration amount (e) Average floor Establish basic correspondence between tone value and deterioration rate The relationship between the calculated deterioration rate and all other gradation values excluding the average gradation value and the deterioration rate is calculated so as to satisfy the basic table, and the unit deterioration amount calculation floor is calculated based on the calculated correspondence relationship. Table update processing for updating the key value / deterioration characteristic conversion table

(F) Mechanism 6
In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel As a mechanism for updating the gradation value / degradation characteristic conversion table referred to the calculation of the deterioration amount, a mechanism for executing the following processing function or procedure is proposed.
(A) Matrix average gradation calculation processing for calculating an average gradation value in units of rows and an average gradation value in units of columns corresponding to the dummy pixels in the input display data corresponding to each display pixel in the effective display area ( b) Until the measurement timing of luminance degradation, the average gradation value calculated for each row is given to the corresponding dummy pixel, while the average gradation value calculated for each column is given to the dummy pixel corresponding to each column. At the measurement timing of luminance degradation, dummy pixel data determination processing for giving a measurement gradation value to all the dummy pixels (c) calculating the average luminance of each emission luminance measured for each dummy pixel, (D) Deterioration rate calculation process for calculating a deterioration rate within the measurement period based on the detected cumulative deterioration amount (e) Average gradation value and deterioration rate Basic correspondence of The relationship between the calculated deterioration rate and all other gradation values excluding the average gradation value and the deterioration rate is calculated so as to satisfy the basic table, and the unit deterioration amount calculation floor is calculated based on the calculated correspondence relationship. Table update processing for updating the key value / deterioration characteristic conversion table

(G) Mechanism 7
In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel As a mechanism for updating the gradation value / degradation characteristic conversion table referred to the calculation of the deterioration amount, a mechanism for executing the following processing function or procedure is proposed.
(A) Average gradation calculation processing for each block for calculating the average gradation value in units of row blocks and the average gradation value in units of column blocks of the input display data corresponding to each display pixel in the effective display area (b) Luminance degradation Until the measurement timing, the average gradation value calculated in units of row blocks is given to the dummy pixels corresponding to each block, while the average gradation value calculated in units of column blocks is assigned to the dummy pixels corresponding to each column block. In the measurement timing of luminance degradation, dummy pixel data determination processing for giving a measurement gradation value to all dummy pixels (c) calculating an average luminance of each emission luminance measured for each dummy pixel, and measuring (C) Degradation rate calculation process for calculating the degradation rate within the measurement period based on the detected cumulative degradation amount (e) Average gradation Calculate the correspondence between the calculated degradation rate and all other gradation values except the average gradation value and the degradation rate so that the basic table that defines the basic correspondence relationship between the degradation rate and the average gradation value is satisfied. Table update processing for updating the gradation value / deterioration characteristic conversion table for unit deterioration amount calculation

(H) Mechanism 8
Tone values that are used to calculate the unit deterioration amount of each pixel when dummy pixels corresponding to the number of matrices in the effective display area and detection sensors that detect the emission luminance of the dummy pixels are arranged outside the effective display area / As a mechanism for updating the deterioration characteristic conversion table, a mechanism for executing the following processing function or procedure is proposed.
(A) Average gradation calculation processing for each block for calculating the average gradation value in units of row blocks and the average gradation value in units of column blocks of the input display data corresponding to each display pixel in the effective display area (b) Luminance degradation Until the measurement timing, the average gradation value calculated in units of row blocks is given to a plurality of dummy pixels corresponding to each block, while the average gradation value calculated in units of column blocks corresponds to each column block. The dummy pixel data determination process that gives the measurement gradation value to all the dummy pixels (c) was measured for each of the dummy pixels for the number of matrices. The average luminance of each light emission luminance is calculated, and the cumulative deterioration amount detection process for detecting the cumulative deterioration amount generated up to the time of measurement (d) The gradation value and the unit deterioration amount are associated with each size of the cumulative deterioration amount. Referring to irradiation table, the detected read a table value corresponding to the cumulative deterioration amount, table update processing for updating the tone value / degradation characteristics conversion table for the unit degradation amount calculation

  In the invention proposed by each mechanism, the effective display area is divided into matrix units or block units, and the light emission luminance of the dummy pixels whose light emission is controlled with the average gradation value calculated for each of the divisions is detected. Thereafter, the average deterioration characteristic reflecting the influence of the in-plane variation of the deterioration characteristic is measured by calculating the average luminance of the detected total light emission luminances. By updating the gradation value / deterioration characteristic conversion table based on this deterioration characteristic, it is possible to realize estimation accuracy that accurately reflects the average deterioration characteristic of all the pixels (light emitters) constituting the effective display area.

Hereinafter, embodiments of the self-luminous display device according to the invention will be described.
In addition, the well-known or well-known technique of the said technical field is applied to the part which is not illustrated or described in particular in this specification.
Moreover, the form example demonstrated below is one form example of invention, Comprising: It is not limited to these.

(A) Technology for accurately reflecting fluctuations in light emission characteristics when estimating the deterioration amount (A-1) Basic concept The gradation value and the deterioration amount are not necessarily in a proportional relationship. This is because the organic EL element has a characteristic that the light emission characteristic changes due to the characteristic error between panels, the environmental temperature, the light emission temperature of the panel surface, and the like.
For this reason, even if the gradation value is cumulatively added for each pixel, the deterioration amount of the corresponding pixel cannot be accurately estimated.

In view of this, the inventors propose a mechanism for measuring the temporal variation of the light emission characteristics of the organic EL element and reflecting the measurement result in the estimation of the deterioration amount.
FIG. 1 shows the change over time in the deterioration rate (rate) due to the difference in the light emission time length. FIG. 1 shows temporal changes in light emission luminance in the case where lighting of a light emitter constituting a certain pixel is controlled with a constant gradation value. A curve D _APL represents a deterioration curve when lighting control is performed on a certain pixel (for example, a dummy pixel for measuring deterioration characteristics) with an average gradation value of the entire screen.

A straight line α _t1 indicated by a wavy line in FIG. 1 indicates a progress rate (deterioration rate) of luminance deterioration at time t1. Further, a straight line α _t2 indicated by a one-dot chain line in FIG. 1 indicates a progress rate (deterioration rate) of luminance deterioration at time t2. As can be seen by comparing the slopes of the two straight lines, the progress rate of the luminance deterioration changes with time. That is, even when the light emitter is controlled to be lighted at a constant gradation value, the deterioration rate changes with the passage of time.
Therefore, in order to realize an accurate estimation of the deterioration amount, it is necessary to change the correspondence relationship between the gradation value and the deterioration rate (amount) in consideration of the change with time.

However, as described above, the correspondence between the gradation value and the deterioration rate (amount) varies depending on the characteristic difference between the panels and other factors. For this reason, it is practically difficult to prepare a correspondence that satisfies all the factors through prior experiments and the like.
In view of this, the inventors propose a method for improving the estimation accuracy of the deterioration amount by measuring the light emission luminance of the dummy pixel whose light emission is controlled to be equivalent to the effective display area with respect to the deterioration characteristic unique to each light emitting panel.

Basically, the dummy pixels are controlled to emit light with the average gradation value of the entire screen, and the change in the emission luminance is measured. However, there is a case where the actual measured value of the deterioration characteristic does not sufficiently reflect the deterioration characteristic of the entire screen only by controlling the light emission of the dummy pixel with the average gradation value of the entire screen.
FIG. 2 shows a typical example in which a measurement error occurs in an actual measurement value. FIG. 2A shows a display example in the case where the entire effective display area (that is, the entire screen) is controlled to emit light uniformly with 50% luminance. FIGS. 2B and 2C are display examples in a case where light emission is controlled uniformly at 100% luminance in a region occupying 50% of the total display area, and light emission control is uniformly performed at 0% luminance on the outer side. . Both display examples are the same in that the average gradation value of the entire screen is 50% luminance.

However, as shown in FIG. 3, when the magnitude of the deterioration rate α with respect to 100% luminance is expressed as 100%, the deterioration characteristic curve has a characteristic that does not become a straight line. That is, the change in the deterioration rate is small while the light emission luminance is low, but the change in the deterioration rate suddenly increases as the light emission luminance increases.
Therefore, even if the light emission luminance of the entire screen is the same, the deterioration characteristics of each pixel are not uniform, and the progress of the luminance deterioration varies from pixel to pixel. For example, the deterioration amount of the light emitter controlled to emit light at 100% luminance is several times the deterioration amount of the light emitter controlled to emit light at 50% luminance.
Therefore, the inventors propose a technique that can detect the deterioration characteristics of the entire screen in a state closer to the substance.

(A-2) Configuration Example of Display Panel FIG. 4 shows a configuration example of the organic EL panel module. FIG. 4 is a diagram showing from the viewpoint of main components necessary for explanation, and the drive circuit and other peripheral circuits are omitted.
The organic EL panel module 1 includes an effective display area 3 and a dummy pixel area 5.
The effective display area 3 is an area where light emission can be observed from the outside. On the other hand, the dummy pixel region 5 is a light-shielded region so that light emission is not observed from the outside, and is disposed outside the effective display region 3.

The dummy pixel region 5 shown in FIG. 4 is composed of a plurality of dummy pixels 51. Each dummy pixel 51 constituting the dummy pixel region 5 is associated with a partial region in the effective display region, and the deterioration characteristics with each row or a plurality of rows of the effective display region as a unit and each column or a plurality of columns as a unit. It is used to detect the deterioration characteristics. Specifically, an average gradation value D _APL in units of associated rows or columns is given to each dummy pixel. Thereby, the deterioration state reflecting the light emission state of the partial region is reproduced.

5 to 7 show arrangement examples of the dummy pixel region 5. FIG. 5 shows an example in which one row of dummy pixel regions 5 and one column of dummy pixel regions 5 are arranged outside the effective display region 3. FIG. 6 shows an example in which one row of dummy pixel areas 5 is arranged outside the effective display area 3. FIG. 7 shows an example in which the dummy pixel area 5 for one column is arranged outside the effective display area 3. Thus, the arrangement position of the dummy pixel region 5 is arbitrary.
The dummy pixels 51 are arranged in units of basic emission colors that constitute one pixel (display pixel) on display. 5 to 7 show a case where the display pixel is configured by three pixels of a red (R) light emitter, a green (G) light emitter, and a blue (B) light emitter.

Incidentally, the effective display area 3 is composed of display pixels for N rows × M columns. Also, any dummy pixel 51 is controlled to emit light during the blanking period.
The display panel proposed by the inventors can be realized only by adding one selection line (gate drive line) to a general display panel. That is, the dummy pixel 51 may have the same structure as each pixel in the effective display area 3, and an existing drive circuit can be used. Therefore, the driving of the dummy pixel does not require a dedicated driving circuit or a large-scale driving circuit.
The light emission luminance of each light emitter constituting the dummy pixel 51 is detected by a luminance detection sensor (not shown).

  FIG. 8 shows an arrangement example of the luminance detection sensor 7. The luminance detection sensor 7 is disposed so as to cover the entire dummy pixel 51 as a unit, or to cover the entire dummy pixel for each basic light emission color. However, the luminance detection sensor can also be arranged in each dummy pixel for each basic emission color. The luminance detection sensor 7 detects visible light output from the dummy pixel 51 and converts it into an electrical signal.

An arbitrary detection sensor is applied to the light detection element. In the case of this embodiment, a visible light sensor using an amorphous silicon semiconductor is used as the light detection element.
The light amount information detected as a current value is amplified and converted into a voltage value, and is output as a light detection signal.

(B) Preferred Embodiment Hereinafter, an embodiment of an organic EL display device that employs the above-described degradation characteristic updating technique will be described.
(B-1) Form example 1
(A) Schematic Configuration In this embodiment, there is a method of controlling the emission of the corresponding dummy pixel with the average gradation value calculated in matrix units, and measuring the cumulative deterioration amount of the effective display area based on the average luminance of the actual measurement result. An example of combining a method for updating a gradation value / deterioration amount conversion table with reference to a reference table in which gradation values and unit deterioration amounts are associated with each other according to the magnitude of the accumulated deterioration amount will be described.

FIG. 9 shows an outline of the system configuration of the organic EL display device 11 described in this embodiment. The organic EL display device 11 includes an organic EL panel module 13, an input display data correction unit 15, and a conversion table update unit 17.
In the case of this embodiment, the organic EL panel module 13 having the structure shown in FIG. 5 is used. That is, the organic EL panel module 13 in which one (total M + N) dummy pixels 51 are arranged at the end of each row and each column is employed.

  The input display data correction unit 15 is a processing device that individually corrects the input display data so that the deterioration amount of each pixel constituting the effective display area 3 matches the deterioration amount of the reference pixel determined for each basic light emission color. Here, the reference pixel is assumed to be a pixel whose light emission is continuously controlled with the average gradation value of the input display data.

The conversion table update unit 17 generates a dummy pixel data for the dummy pixel 51, and a gradation value and unit reflecting the average deterioration state of the entire screen based on the average luminance of the emission luminance corresponding to each dummy pixel. It is a processing device that executes a process for specifying a relationship between deterioration amounts.
Note that the correspondence between the specified gradation value and the unit deterioration amount is output to the input display data correction unit 15 as conversion table update data.

(B) Configuration of Input Display Data Correction Unit FIG. 10 shows a detailed configuration example of the input display data correction unit 15. The input display data correction unit 15 includes a gradation value / deterioration amount conversion table 151, a unit deterioration amount difference calculation unit 153, a cumulative deterioration amount difference accumulation unit 155, a correction amount determination unit 157, and a video signal correction unit 159.
The gradation value / degradation amount conversion table 151 is a table for converting input display data (gradation values) into unit deterioration amounts. The reason why the conversion table is used is that, as described above, the progress of the deterioration of the organic EL element is not proportional to the gradation value.

FIG. 11 shows an example of the gradation value / degradation amount conversion table 151. In the gradation value / degradation amount conversion table 151, all gradation values of the input display data and unit deterioration amounts corresponding to these are stored in association with each other. The unit deterioration amount R is given as a product of the deterioration rate (deterioration rate) corresponding to each gradation value and the light emission period t. The light emission period t may be fixed or variable.
The unit deterioration amount difference calculation unit 153 is a processing device that calculates a unit deterioration amount difference newly generated between a certain reference pixel and each pixel in the effective display area. The reference pixel is assumed to be a pixel that emits light with an average gradation value of all the pixels constituting one frame. The average gradation value is set for each basic emission color.

The accumulated deterioration amount difference accumulation unit 155 is a storage area or a storage device that stores a deterioration amount difference obtained by accumulating the unit deterioration amount difference of each pixel with respect to the reference pixel. The accumulated deterioration amount difference represents the degree of progress (whether advanced or delayed) and the degree of progress with respect to the reference pixel.
The correction amount determination unit 157 is a processing device that determines a correction value corresponding to each pixel based on the accumulated deterioration amount difference. As a correction amount determination method, a method of determining a correction value so as to eliminate the accumulated deterioration amount difference is employed.

The video signal correction unit 159 is a processing device that converts input display data into corrected display data.
In the case of this embodiment, the video signal correction unit 159 executes processing for adding / subtracting a correction value to / from the input display data. The correction value is given from the correction amount determination unit 157. The corrected display data after conversion is given to the gradation value / degradation amount conversion table 151 and the conversion table update unit 17.

(C) Configuration of Conversion Table Update Unit FIG. 10 shows a detailed configuration example of the conversion table update unit 17. The conversion table update unit 17 includes a dummy pixel data determination unit 171, a dummy pixel data multiplexing unit 173, a cumulative deterioration amount detection unit 175, and a table update unit 177.
The dummy pixel data determination unit 171 is a processing device that determines dummy pixel data to be supplied to the dummy pixels 51.

  The dummy pixel data determination unit 171 calculates the average gradation value of the input display data in units of rows and columns during the period excluding the luminance degradation measurement timing, and each of the calculated average gradation values corresponds to the corresponding dummy pixel 51. Execute the process to output to. FIG. 12 shows a correspondence relationship between the calculated average gradation value and the dummy pixel. On the other hand, at the measurement timing of luminance degradation, the dummy pixel data determination unit 171 gives a gradation value (for example, a gradation value corresponding to a 100% luminance level) set for each basic light emission color to all the pixel data.

The dummy pixel data multiplexing unit 173 is a processing device that multiplexes the dummy pixel data with the corrected display data and outputs it to the organic EL panel module 13.
The cumulative deterioration amount detection unit 175 calculates the average light emission luminance of the dummy pixels measured at the measurement timing of the deterioration characteristic, and detects the cumulative deterioration amount R (actual value) with respect to the initial luminance based on the average light emission luminance. It is. As shown in FIG. 13, the cumulative deterioration amount R (actually measured value) is given as a reduction rate with the initial luminance being 100%.

  The table update unit 177 reads the correspondence relationship between the gradation value associated with the detected accumulated deterioration amount R and the unit deterioration amount (deterioration rate) from the reference table, and the gradation value / deterioration amount using the read correspondence relationship. It is a processing device that updates the conversion table 151. In the reference table, a correspondence relationship for each cumulative deterioration amount set in advance is stored in association with all gradation values. FIG. 14 shows an example of the reference table. In the case of FIG. 14, the correspondence between all gradation values and unit deterioration amount (deterioration rate) is related to the accumulated deterioration amount R in increments of 1%.

(D) Measurement of deterioration characteristics and update operation of conversion table FIG. 15 shows the contents of the processing operation in this embodiment.
First, from the start of use until the time point t1, the M + N dummy pixels 51 in which the average gradation value in units of rows and the average gradation value in units of columns calculated by the dummy pixel data determination unit 171 are associated with each row and column. Given to. At this time, the average gradation value of the matrix unit is calculated for each basic light emission color (for each RGB) and given to the corresponding dummy pixel 51.
As a result, the light emission characteristics of the dummy pixels 51 corresponding to the respective rows and columns are reduced similarly to the light emission characteristics of the corresponding rows and columns, respectively.

  During this period, the unit deterioration amount difference calculation unit 153 refers to the gradation value / deterioration amount conversion table 151 at the time of initial setting, and converts the corrected display data into a unit deterioration amount (deterioration rate). Further, the correction amount determination unit 157 determines a correction value so that the cumulative deterioration amount of each pixel approaches the cumulative deterioration amount of the reference pixel according to the unit deterioration amount difference of each pixel with respect to the reference pixel. As a result, the input display data corrected by the correction value is output from the video signal correction unit 159 to the effective EL panel module 13 as corrected display data.

Eventually, at time t1, the dummy pixel data determination unit 171 gives the gradation value for measuring the degradation characteristics (here, 100% luminance value) as dummy pixel data corresponding to all the dummy pixels.
The luminance detection sensor 7 detects the light emission luminance of each dummy pixel at this time, and outputs it to the cumulative deterioration amount detection unit 175. The emission luminance is detected for each basic emission color. The cumulative deterioration amount detection unit 175 calculates an average luminance value of all the dummy pixels for each basic emission color based on these N + M detected luminance values.

Here, rx is a detection luminance value of a dummy pixel whose emission is controlled with an average gradation value in a column unit of a certain basic emission color, and cy is a detection luminance value of a dummy pixel whose emission control is performed with an average gradation value in a row unit. To do. In this case, the in-plane average luminance value K _APL is calculated by the following equation.
MN
K _APL = (Σrx + Σcy) ÷ (m + n)
x = 1 y = 1
In this way, when the in-plane average luminance value K _APL is obtained, the cumulative deterioration amount detection unit 175 provides a value obtained by giving the degree of deterioration of the in-plane average luminance value K _{APL to} the initial luminance at 100 percent (cumulative deterioration amount R). Convert to.

Thereafter, the table updating unit 177 reads the correspondence between the gradation value corresponding to the cumulative deterioration amount R and the unit deterioration amount with reference to the reference table (FIG. 14), and converts the read correspondence relationship into the conversion table update data. Is recorded in the gradation value / degradation amount conversion table 151.
As a result, the correspondence relationship of the gradation value / degradation amount conversion table 151 is updated so as to accurately reflect the average degradation characteristic of the effective display area at the time of measurement.
Thereafter, the unit deterioration amount difference calculation unit 153 calculates a unit deterioration amount difference reflecting the deterioration state at the time point t1 and uses it to determine a correction value.

Further, the correction amount determination unit 157 determines a correction value so that the cumulative deterioration amount of each pixel approaches the cumulative deterioration amount of the reference pixel according to the cumulative deterioration amount difference of each pixel with respect to the reference pixel. As a result, the input display data corrected by the correction value is output from the video signal correction unit 159 to the effective EL panel module 13 as corrected display data.
These correction operations are repeated until the next measurement timing t2. Then, at the next measurement timing t2, the above-described light emission luminance measurement operation, calculation of the surface average luminance value K _APL and other processing are executed.

(E) Effects of Embodiment As described above, the dummy pixels 51 corresponding to the number of matrices are controlled to emit light with the average gradation value calculated in matrix units, and then the dummy pixels 51 corresponding to the number of matrices are detected. By calculating the average value of the light emission luminance, it is possible to measure the average deterioration state of all the pixels constituting the effective display area.
By updating the gradation value / deterioration amount conversion table based on this measurement result, it is possible to improve the estimation accuracy of the calculated deterioration amount difference. As a result, the correction accuracy is improved, and the expansion of the deterioration amount difference between pixels is suppressed or improved.

Of course, these effects can be realized only by simple signal processing using the measurement result. For this reason, unlike the prior art, it is possible to eliminate the need for an enormous experiment in advance in consideration of all events such as changes over time. For this reason, the manufacturing cost can be significantly reduced.
Further, since the processing method described in the embodiment has simple control contents, it can be realized at low cost even when the screen size is increased.
Further, the dummy pixel can be manufactured with exactly the same pixel configuration as the effective display area, and does not require a complicated circuit configuration dedicated to the dummy pixel or a special control operation. This is also advantageous in terms of reduction in circuit scale and production difficulty.

(B-2) Embodiment 2
In this embodiment, a case will be described in which dummy pixels are arranged in a ratio of one in a plurality of rows and one in a plurality of columns of an effective display area.
FIG. 16 shows the positional relationship between the matrix position for calculating the average gradation value and the dummy pixel to which the calculated average gradation value for each matrix unit is given. In the case of FIG. 16, one dummy pixel is arranged in two rows of the effective display area and one in two columns. Therefore, the number of dummy pixels can be reduced to half (= (M × N) / 2) as compared with the case where the effective display area is configured by display pixels of M rows × N columns. Along with this, the number of matrices for calculating the average gradation value is also halved, and the calculation load is halved.

As described above, when this embodiment is adopted, Embodiment 1 except that the calculation process of the average gradation value and the calculation formula of the average luminance value are partially changed in connection with the decrease in the number of dummy pixels. An organic EL panel module can be realized with basically the same system configuration and processing operation.
As a result, this embodiment is particularly effective when the organic EL panel module is increased in size or when the calculation capability is ineffective.
It should be noted that the number of dummy pixels can be arranged to be one in three rows and one or more in three columns. As the number of thinning-outs increases, the area occupied by dummy pixels can be reduced, and the load required for calculation processing can be reduced. Further, it is not necessary to make the thinning number the same in the row direction and the column direction, and n rows can be skipped in the row direction and m columns can be skipped in the column direction.

(B-3) Embodiment 3
In this embodiment as well, a case where dummy pixels are arranged in a ratio of one in a plurality of rows and one in a plurality of columns of the effective display area will be described. However, in this case, an average gradation value of a row block having a plurality of rows as one unit and an average gradation value of a column block having a plurality of columns as one unit are given to each dummy pixel.
FIG. 17 shows the positional relationship between the matrix block for calculating the average gradation value and the dummy pixel to which the calculated average gradation value for each matrix unit is given. In the case of FIG. 17, dummy pixels are arranged in a ratio of one in three rows and one in three columns of the effective display area. That is, when the effective display area is composed of display pixels of M rows × N columns, the number of dummy pixels is one third of that of the first embodiment.

The average gradation value is calculated for all rows and columns. For example, in the case of FIG. 17, the average gradation value is calculated for all the pixels in each block every three rows in the row direction and every three columns in the column direction.
As described above, when this embodiment is adopted, the calculation method of the average luminance value is changed, and the calculation formula of the average luminance value is partially changed due to the decrease in the number of dummy pixels. Except for this, it is possible to realize an organic EL panel module with basically the same system configuration and processing operation as in the first embodiment.

  Note that the number of dummy pixels may be one in two rows and one in two columns, or one in four rows and one or more in four columns. As the number of thinnings increases, the area occupied by dummy pixels can be reduced. Further, it is possible to reduce the load required for the calculation process of the luminance average value. Also in this case, it is not necessary to use the same number of thinned-out dummy pixels in the row direction and the column direction, and n rows may be skipped in the row direction and m columns may be skipped in the column direction.

(B-4) Embodiment 4
This form example corresponds to a combination example of form example 1 and form example 3. In other words, dummy pixels corresponding to the total number of matrices (M + N in the case where the effective display area is M rows × N columns) are arranged as in the first embodiment, while a plurality of effective display areas are provided as in the third embodiment. An average gradation value for dummy pixels is calculated in units of rows and a plurality of columns. The calculated average gradation value for each block is simultaneously given to a plurality of corresponding dummy pixels.

FIG. 18 shows a correspondence relationship between a matrix block for calculating an average gradation value and a dummy pixel to which the calculated average gradation value for each matrix unit is given. As shown in FIG. 18, the average gradation value in each block is calculated every three rows in the row direction and every three columns in the column direction. The calculated average gradation value for each block is given to the corresponding three dummy pixels.
As described above, when this embodiment is adopted, the system configuration and processing operation are basically the same as those in Embodiment 1 except that the calculation method of the average luminance value and the distribution method to each dummy pixel are changed. An EL panel module can be realized.

  As in the case of the third embodiment described above, the unit block which is the average gradation value calculation unit is one in two rows in the row direction and one in two columns in the column direction, or one in four rows. It may be one or more in four rows. Also in this case, it is not necessary to use the same number of thinned-out dummy pixels in the row direction and the column direction, and n rows may be skipped in the row direction and m columns may be skipped in the column direction.

(B-5) Embodiment 5
In this embodiment, the gradation value / degradation amount conversion table is stored based on the average gradation value of the entire screen from the previous measurement timing to the current measurement timing and the accumulated deterioration amount of the average brightness actually measured. A method for calculating all the correspondence relationships will be described.
In this embodiment, the dummy pixel arrangement, the dummy pixel data determination method, and the dummy pixel data allocation method described in Embodiments 1 to 4 can be applied.
That is, the organic EL panel module described in this embodiment is characterized in the processing content after the cumulative deterioration amount detection unit 175 detects the cumulative deterioration amount.

In FIG. 19, the structural example of the input display data correction | amendment part 15 and the conversion table update part 17 which comprises the organic EL display apparatus 11 is shown. In FIG. 19, the same reference numerals are given to the portions corresponding to FIG. 11. Since the input display data correction unit 15 is exactly the same as that in the first embodiment, only the configuration of the change table update unit 17 will be described.
The conversion table update unit 17 illustrated in FIG. 19 includes a dummy pixel data determination unit 171, a dummy pixel data multiplexing unit 173, a cumulative deterioration amount detection unit 175, an average deterioration rate calculation unit 179, and a table update unit 181.

The degradation rate calculation unit 179 calculates the average degradation rate within the period based on the cumulative degradation amount ΔR newly generated between the previous measurement timing and the current measurement timing and the time length between the measurement timings. It is a device.
FIG. 20 shows a cumulative deterioration amount difference ΔR newly generated between measurement timings. This cumulative deterioration amount difference ΔR is calculated as a difference in average luminance values of all dummy pixels detected at each measurement timing.
FIG. 20 shows the calculation principle of the average deterioration rate when the detected luminance at time t2 is 90% and the detected luminance at time t3 is 85%.

In the case of FIG. 20, the cumulative deterioration amount difference (luminance difference) ΔR is 5%. A value obtained by dividing the accumulated deterioration amount difference ΔR by the number of frames F between measurement timings is an average deterioration rate ΔR / F in the period. This value is output to the table update unit 181.
The table update unit 181 calculates all other correspondence relationships (correspondence relationship between gradation values and unit deterioration amounts) based on the average gradation value between measurement timings and the calculated average deterioration rate.

Here, the average gradation value and the average deterioration rate which are used as a reference by the table update unit 181 represent an actual correspondence relationship reflecting the content of the display image, the use environment, and the like. However, this correspondence is only one of 256 correspondences (when gradation is given by 8 bits). Therefore, the table updating unit 181 calculates the unit deterioration amount corresponding to the deterioration state for all input gradation values as follows.
At this time, the table updating unit 181 performs unit deterioration corresponding to the remaining 255 gradations (when gradation is given by 8 bits) so as to satisfy the basic correspondence relationship between the average gradation value and the average deterioration rate shown in FIG. The amount (deterioration rate) is calculated.

The basic correspondence is referred to because the correspondence other than the actual measurement basically maintains the basic correspondence shown in FIG. 21 even if the average deterioration rate corresponding to the average gradation value changes with time. Because. The basic correspondence shown in FIG. 21 is stored in the table update unit 181 as basic table information.
FIG. 22 shows the calculation principle of the unit deterioration amount (deterioration rate) corresponding to each gradation value.

In FIG. 22, the average gradation value between measurement timings (t1 to t2) is 100 (when the gradation is expressed by 8 bits), and the measured average deterioration rate (hereinafter also referred to as “measured deterioration rate”). ) and are expressed as X _100. At this time, the actual deterioration rate X _a corresponding to an arbitrary gradation value a, is multiplied by a ratio α _a / α ₁₀₀ between average deactivation rate that is identified through the base table curve shown in Figure 23 the actual degradation rate X ₁₀₀ This can be calculated.
As a result, a new correspondence relationship amplified by the deterioration rate (degradation speed) is calculated while maintaining the basic correspondence relationship between the gradation values.

Table updating unit 181, when the measured decay rate X _a corresponding to all the gray scale value is calculated, updates the gradation value / deterioration amount conversion table 151 with these values. FIG. 24 shows a state in which the deterioration rate is updated for all the gradation values constituting the gradation value / degradation amount conversion table 151.
Incidentally, as the measurement timing interval is shorter, it is possible to cope with a sudden change in the tendency of the display image. Therefore, the error of the calculated deterioration amount can be reduced accordingly.

As described above, when the fifth embodiment is used, it is possible to eliminate the need to calculate all the relationships between the gradation values and the unit deterioration amounts in advance for each cumulative deterioration amount as in the other four embodiments. That is, the correspondence relationship of the gradation value / degradation amount conversion table 151 is updated based on the basic correspondence relationship that gives a relative relationship between the gradation value and the average deterioration rate (degradation speed) and one actually measured deterioration rate. be able to.
For this reason, it is possible to greatly reduce the amount of information to be grasped in advance experiments, and in this respect, it is possible to realize a significant reduction in manufacturing cost.
Also, this embodiment can be applied regardless of the screen size.

(C) Other Embodiments (a) In the above embodiment, the case where the basic emission colors are three colors of RGB has been described. However, the basic emission colors can also be applied to the case where there are four or more colors including complementary colors. In this case, as many dummy pixels as the number of the basic emission colors may be prepared.
(B) In the above-described embodiment, the color generation form of the basic light emission color has not been described. However, an organic EL element having a different light emitting element material for each basic light emission color may be prepared. It may be used to generate a basic emission color.

(C) Although the organic EL display panel is illustrated as an example of the self-luminous display device in the above-described embodiment, the present invention can also be applied to other self-luminous display devices. For example, the present invention can be applied to FED (field emission display), inorganic EL display panel, LED panel, and the like.
(D) In the above-described embodiment, the organic EL display device that implements the function of actually measuring the deterioration characteristics of the dummy pixels and updating the gradation value / deterioration amount conversion table has been described.
However, the conversion table update function may be implemented as a part of an image processing apparatus equipped with a self-luminous display device. For example, the update function of the conversion table includes a video camera, a digital camera, and other imaging devices (including not only a camera unit but also one configured integrally with a recording device), an information processing terminal (a portable computer, a portable computer). (Phone, portable game machine, electronic notebook, etc.), game machine, printer device, etc.

(E) In the above-described embodiment, the organic EL display device that implements the function of actually measuring the deterioration characteristics of the dummy pixels and updating the gradation value / deterioration amount conversion table has been described.
However, the conversion table update function may be implemented as part of an image processing apparatus independent of the self-luminous display apparatus. For example, the conversion table update function may be installed in an image processing apparatus that supplies an input display data signal to a self-luminous display apparatus or an image processing apparatus equipped with the self-luminous display apparatus. In other words, a method may be employed in which the light emission luminance and deterioration information of the dummy pixels are taken into the self device from the self light emitting display device or the like.

(F) In the above-described embodiment, the update function of the conversion table has been described from a functional aspect. Needless to say, an equivalent function can be realized as hardware or software.
Further, not only all of these processing functions are realized by hardware or software, but some of them may be realized by using hardware or software. That is, a combination of hardware and software may be used.
(G) Various modifications can be considered for the above-described embodiments within the scope of the gist of the invention. Various modifications and applications created or combined based on the description of the present specification are also conceivable.

It is a figure explaining the time-dependent change of a deterioration rate to the difference in light emission time length. It is a figure which shows the example of a display when an error arises between an actual deterioration state only by measuring the deterioration state of the dummy pixel which carried out light emission control with the average gradation value of the whole screen. It is a figure which shows the relationship between an average gradation value and a deterioration rate. It is a figure which shows the structural example of an organic electroluminescent panel module. It is a figure which shows the example of arrangement | positioning of a dummy pixel. It is a figure which shows the example of arrangement | positioning of a dummy pixel. It is a figure which shows the example of arrangement | positioning of a dummy pixel. It is a figure which shows the example of arrangement | positioning of a brightness | luminance detection sensor. It is a figure which shows the system structural example of an organic electroluminescent display apparatus. It is a figure which shows the internal structural example of an input display data correction | amendment part and a conversion table update part. It is a figure which shows the example of a gradation value / deterioration rate conversion table. It is a figure which shows the correspondence of the average gradation value calculated per matrix, and the dummy pixel arrange | positioned matched with all the matrices. It is a figure which shows the relationship between the amount of accumulation degradation defined as a degradation degree with respect to initial luminance, and a detection timing. It is a figure which shows the example of the reference table which matched the corresponding relationship of all the gradation values and unit deterioration amount according to accumulation deterioration amount. It is a figure explaining the update operation | movement of a conversion table. It is a figure which shows the correspondence of the average gradation value calculated per matrix, and the dummy pixel arrange | positioned by thinning. It is a figure which shows the correspondence of the average gradation value calculated per matrix block, and the dummy pixel arrange | positioned by thinning. It is a figure which shows the correspondence of the average gradation value calculated per matrix block, and the dummy pixel arrange | positioned corresponding to all the matrices. It is a figure which shows the other internal structural example of an input display data correction | amendment part and a conversion table update part. It is a figure explaining the amount of accumulation degradation newly generated between measurement timings. It is a figure which shows the example of a reference | standard table which gives the relative relationship between an average gradation value and a deterioration rate. It is a figure which shows the correspondence of the measured correspondence and another correspondence. It is a figure which shows the relationship between the measured value on a basic table curve, and another correspondence. It is a figure which illustrates conceptually the update operation of a conversion table.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Dummy pixel 7 Luminance detection sensor 11 Organic EL display apparatus 13 Organic EL panel module 15 Input display data correction | amendment part 17 Conversion table update part 157 Correction amount determination part 171 Dummy pixel data determination part 175 Cumulative degradation amount detection part 177,181 Table update Part 179 Average deterioration rate calculation part

Claims (18)

A display panel having an effective display area in which display pixels of M rows × N columns are arranged, and a dummy pixel area in which dummy pixels corresponding to the number of matrices of the effective display area are arranged;
A luminance detection sensor that individually detects the emission luminance specific to each dummy pixel at the measurement timing of luminance degradation,
An average gradation calculation unit for each matrix that calculates an average gradation value in units of rows and an average gradation value in units of columns of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, M average gradation values calculated for each row are given to the dummy pixels corresponding to each row, while N average gradation values calculated for each column are given to each column. A dummy pixel data determination unit that gives a measurement gradation value to all the dummy pixels at the measurement timing of luminance deterioration given to the corresponding dummy pixel,
An average luminance of each emission luminance measured for each of the dummy pixels for the number of matrixes, and a cumulative deterioration amount detection unit for detecting the cumulative deterioration amount generated up to the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A self-luminous display device comprising: a table updating unit that updates a deterioration characteristic conversion table. A display panel having an effective display area in which display pixels of M rows × N columns are arranged, and a dummy pixel area in which one dummy pixel is arranged in a plurality of rows and one dummy pixel is arranged in a plurality of columns of the effective display area; ,
A luminance detection sensor that individually detects the emission luminance specific to each dummy pixel at the measurement timing of luminance degradation,
An average gradation calculation unit for each matrix that calculates an average gradation value in units of rows and an average gradation value in units of columns corresponding to the dummy pixels of the input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of rows is given to the corresponding dummy pixels, while the average gradation value calculated in units of columns is given to the dummy pixels corresponding to each column, In the measurement timing of deterioration, a dummy pixel data determination unit that gives a gradation value for measurement to all the dummy pixels,
An average luminance of each emission luminance measured for each of the dummy pixels is calculated, and a cumulative deterioration amount detection unit that detects a cumulative deterioration amount that has occurred until the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A self-luminous display device comprising: a table updating unit that updates a deterioration characteristic conversion table. A display panel having an effective display area in which display pixels of M rows × N columns are arranged, and a dummy pixel area in which one dummy pixel is arranged in a plurality of rows and one dummy pixel is arranged in a plurality of columns of the effective display area; ,
A luminance detection sensor that individually detects the emission luminance specific to each dummy pixel at the measurement timing of luminance degradation,
An average gradation calculation unit for each block that calculates an average gradation value in units of row blocks and an average gradation value in units of column blocks of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of row blocks is given to at least one dummy pixel corresponding to each block, while the average gradation value calculated in units of column blocks is given to each column block provided at least one dummy pixel corresponding to, the measurement timing of the luminance degradation, a dummy pixel data determining section for giving the gradation value for the measurement to all the dummy pixel,
An average luminance of each emission luminance measured for each of the dummy pixels is calculated, and a cumulative deterioration amount detection unit that detects a cumulative deterioration amount that has occurred until the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A self-luminous display device comprising: a table updating unit that updates a deterioration characteristic conversion table. A display panel having an effective display area in which display pixels of M rows × N columns are arranged, and a dummy pixel area in which dummy pixels corresponding to the number of matrices of the effective display area are arranged;
A luminance detection sensor that individually detects the emission luminance specific to each dummy pixel at the measurement timing of luminance degradation,
An average gradation calculation unit for each matrix that calculates an average gradation value in units of rows and an average gradation value in units of columns of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, M average gradation values calculated for each row are given to the dummy pixels corresponding to each row, while N average gradation values calculated for each column are given to each column. A dummy pixel data determination unit that gives a measurement gradation value to all the dummy pixels at the measurement timing of luminance deterioration given to the corresponding dummy pixel,
An average luminance of each emission luminance measured for each of the dummy pixels for the number of matrixes, and a cumulative deterioration amount detection unit for detecting the cumulative deterioration amount generated up to the measurement time point;
A deterioration rate calculation unit that calculates a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A self-luminous display device comprising: a table updating unit that updates a gradation value / deterioration characteristic conversion table for unit deterioration amount calculation with the calculated correspondence relationship. A display panel having an effective display area in which display pixels of M rows × N columns are arranged, and a dummy pixel area in which one dummy pixel is arranged in a plurality of rows and one dummy pixel is arranged in a plurality of columns of the effective display area; ,
A luminance detection sensor that individually detects the emission luminance specific to each dummy pixel at the measurement timing of luminance degradation,
An average gradation calculation unit for each matrix that calculates an average gradation value in units of rows and an average gradation value in units of columns corresponding to the dummy pixels of the input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of rows is given to the corresponding dummy pixels, while the average gradation value calculated in units of columns is given to the dummy pixels corresponding to each column, In the measurement timing of deterioration, a dummy pixel data determination unit that gives a gradation value for measurement to all the dummy pixels,
An average luminance of each emission luminance measured for each of the dummy pixels is calculated, and a cumulative deterioration amount detection unit that detects a cumulative deterioration amount that has occurred until the measurement time point;
A deterioration rate calculation unit that calculates a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A self-luminous display device comprising: a table updating unit that updates a gradation value / deterioration characteristic conversion table for unit deterioration amount calculation with the calculated correspondence relationship. A display panel having an effective display area in which display pixels of M rows × N columns are arranged, and a dummy pixel area in which one dummy pixel is arranged in a plurality of rows and one dummy pixel is arranged in a plurality of columns of the effective display area; ,
A luminance detection sensor that individually detects the emission luminance specific to each dummy pixel at the measurement timing of luminance degradation,
An average gradation calculation unit for each block that calculates an average gradation value in units of row blocks and an average gradation value in units of column blocks of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of row blocks is given to at least one dummy pixel corresponding to each block, while the average gradation value calculated in units of column blocks is given to each column block provided at least one dummy pixel corresponding to, the measurement timing of the luminance degradation, a dummy pixel data determining section for giving the gradation value for the measurement to all the dummy pixel,
An average luminance of each emission luminance measured for each of the dummy pixels is calculated, and a cumulative deterioration amount detection unit that detects a cumulative deterioration amount that has occurred until the measurement time point;
A deterioration rate calculation unit that calculates a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A self-luminous display device comprising: a table updating unit that updates a gradation value / deterioration characteristic conversion table for unit deterioration amount calculation with the calculated correspondence relationship. Tone values that are used to calculate the unit deterioration amount of each pixel when dummy pixels corresponding to the number of matrices in the effective display area and detection sensors that detect the emission luminance of the dummy pixels are arranged outside the effective display area A device for updating the deterioration characteristic conversion table,
An average gradation calculation unit for each matrix that calculates an average gradation value in units of rows and an average gradation value in units of columns of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, M average gradation values calculated for each row are given to the dummy pixels corresponding to each row, while N average gradation values calculated for each column are given to each column. A dummy pixel data determination unit that gives a measurement gradation value to all the dummy pixels at the measurement timing of luminance deterioration given to the corresponding dummy pixel,
An average luminance of each emission luminance measured for each of the dummy pixels for the number of matrixes, and a cumulative deterioration amount detection unit for detecting the cumulative deterioration amount generated up to the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A conversion table updating apparatus comprising: a table updating unit that updates a deterioration characteristic conversion table. In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel An apparatus for updating a gradation value / deterioration characteristic conversion table that is referred to in calculating a deterioration amount,
An average gradation calculation unit for each matrix that calculates an average gradation value in units of rows and an average gradation value in units of columns corresponding to the dummy pixels of the input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of rows is given to the corresponding dummy pixels, while the average gradation value calculated in units of columns is given to the dummy pixels corresponding to each column, In the measurement timing of deterioration, a dummy pixel data determination unit that gives a gradation value for measurement to all the dummy pixels,
An average luminance of each emission luminance measured for each of the dummy pixels is calculated, and a cumulative deterioration amount detection unit that detects a cumulative deterioration amount that has occurred until the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A conversion table updating apparatus comprising: a table updating unit that updates a deterioration characteristic conversion table. In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel An apparatus for updating a gradation value / deterioration characteristic conversion table that is referred to in calculating a deterioration amount,
An average gradation calculation unit for each block that calculates an average gradation value in units of row blocks and an average gradation value in units of column blocks of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of row blocks is given to at least one dummy pixel corresponding to each block, while the average gradation value calculated in units of column blocks is given to each column block provided at least one dummy pixel corresponding to, the measurement timing of the luminance degradation, a dummy pixel data determining section for giving the gradation value for the measurement to all the dummy pixel,
An average luminance of each emission luminance measured for each of the dummy pixels is calculated, and a cumulative deterioration amount detection unit that detects a cumulative deterioration amount that has occurred until the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A conversion table updating apparatus comprising: a table updating unit that updates a deterioration characteristic conversion table. Tone values that are used to calculate the unit deterioration amount of each pixel when dummy pixels corresponding to the number of matrices in the effective display area and detection sensors that detect the emission luminance of the dummy pixels are arranged outside the effective display area A device for updating the deterioration characteristic conversion table,
An average gradation calculation unit for each matrix that calculates an average gradation value in units of rows and an average gradation value in units of columns of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, M average gradation values calculated for each row are given to the dummy pixels corresponding to each row, while N average gradation values calculated for each column are given to each column. A dummy pixel data determination unit that gives a measurement gradation value to all the dummy pixels at the measurement timing of luminance deterioration given to the corresponding dummy pixel,
An average luminance of each emission luminance measured for each of the dummy pixels for the number of matrixes, and a cumulative deterioration amount detection unit for detecting the cumulative deterioration amount generated up to the measurement time point;
A deterioration rate calculation unit that calculates a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A conversion table updating apparatus, comprising: a table updating unit that updates a gradation value / degradation characteristic conversion table for calculating unit deterioration amount with the calculated correspondence. In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel An apparatus for updating a gradation value / deterioration characteristic conversion table that is referred to in calculating a deterioration amount,
An average gradation calculation unit for each matrix that calculates an average gradation value in units of rows and an average gradation value in units of columns corresponding to the dummy pixels of the input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of rows is given to the corresponding dummy pixels, while the average gradation value calculated in units of columns is given to the dummy pixels corresponding to each column, In the measurement timing of deterioration, a dummy pixel data determination unit that gives a gradation value for measurement to all the dummy pixels,
An average luminance of each emission luminance measured for each of the dummy pixels is calculated, and a cumulative deterioration amount detection unit that detects a cumulative deterioration amount that has occurred until the measurement time point;
A deterioration rate calculation unit that calculates a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A conversion table updating apparatus, comprising: a table updating unit that updates a gradation value / degradation characteristic conversion table for calculating unit deterioration amount with the calculated correspondence. In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel An apparatus for updating a gradation value / deterioration characteristic conversion table that is referred to in calculating a deterioration amount,
An average gradation calculation unit for each block that calculates an average gradation value in units of row blocks and an average gradation value in units of column blocks of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of row blocks is applied to at least one dummy pixel corresponding to each block, while the average gradation value calculated in units of column blocks is applied to each column. A dummy pixel data determination unit that provides to at least one dummy pixel corresponding to a block, and provides a measurement gradation value to all the dummy pixels at a measurement timing of luminance degradation;
An average luminance of each emission luminance measured for each of the dummy pixels is calculated, and a cumulative deterioration amount detection unit that detects a cumulative deterioration amount that has occurred until the measurement time point;
A deterioration rate calculation unit that calculates a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A conversion table updating apparatus, comprising: a table updating unit that updates a gradation value / degradation characteristic conversion table for calculating unit deterioration amount with the calculated correspondence. Tone values that are used to calculate the unit deterioration amount of each pixel when dummy pixels corresponding to the number of matrices in the effective display area and detection sensors that detect the emission luminance of the dummy pixels are arranged outside the effective display area / A computer program for realizing the update process of the deterioration characteristic conversion table,
A process of calculating an average gradation value in row units and an average gradation value in column units of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, M average gradation values calculated for each row are given to the dummy pixels corresponding to each row, while N average gradation values calculated for each column are given to each column. A process for giving a measurement gradation value to all the dummy pixels at the measurement timing of luminance degradation given to the corresponding dummy pixel,
A process of calculating an average luminance of each light emission luminance measured for each of the dummy pixels for the number of matrixes, and detecting a cumulative deterioration amount generated up to the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A computer program that causes a computer to execute a process for updating a deterioration characteristic conversion table. In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel A computer program that realizes update processing of a gradation value / deterioration characteristic conversion table that is referred to in calculating a deterioration amount,
A process of calculating an average gradation value in row units and an average gradation value in column units corresponding to the dummy pixels among the input display data corresponding to each display pixel in the effective display region;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of rows is given to the corresponding dummy pixels, while the average gradation value calculated in units of columns is given to the dummy pixels corresponding to each column, In the measurement timing of deterioration, a process of giving a gradation value for measurement to all the dummy pixels,
A process of calculating an average luminance of each emission luminance measured for each of the dummy pixels, and detecting a cumulative deterioration amount that has occurred until the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A computer program that causes a computer to execute a process for updating a deterioration characteristic conversion table. In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel A computer program that realizes update processing of a gradation value / deterioration characteristic conversion table that is referred to in calculating a deterioration amount,
A process of calculating an average gradation value in units of row blocks and an average gradation value in units of column blocks of the input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of row blocks is given to at least one dummy pixel corresponding to each block, while the average gradation value calculated in units of column blocks is given to each column block To the at least one dummy pixel corresponding to, and at the measurement timing of the luminance degradation, a process of giving a gradation value for measurement to all the dummy pixels;
A process of calculating an average luminance of each emission luminance measured for each of the dummy pixels, and detecting a cumulative deterioration amount that has occurred until the measurement time point;
By referring to a reference table in which the gradation value and the unit deterioration amount are associated with each other according to the magnitude of the accumulated deterioration amount, a table value corresponding to the detected accumulated deterioration amount is read, and the gradation value / unit deterioration amount calculation / A computer program that causes a computer to execute a process for updating a deterioration characteristic conversion table. Tone values that are used to calculate the unit deterioration amount of each pixel when dummy pixels corresponding to the number of matrices in the effective display area and detection sensors that detect the emission luminance of the dummy pixels are arranged outside the effective display area / A computer program for realizing the update process of the deterioration characteristic conversion table,
A process of calculating an average gradation value in row units and an average gradation value in column units of input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, M average gradation values calculated for each row are given to the dummy pixels corresponding to each row, while N average gradation values calculated for each column are given to each column. A process for giving a measurement gradation value to all the dummy pixels at the measurement timing of luminance degradation given to the corresponding dummy pixel,
A process of calculating an average luminance of each light emission luminance measured for each of the dummy pixels for the number of matrixes, and detecting a cumulative deterioration amount generated up to the measurement time point;
A process of calculating a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A computer program for causing a computer to execute a process of updating a gradation value / deterioration characteristic conversion table for calculating a unit deterioration amount with a calculated correspondence relationship. In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel A computer program that realizes update processing of a gradation value / deterioration characteristic conversion table that is referred to in calculating a deterioration amount,
A process of calculating an average gradation value in row units and an average gradation value in column units corresponding to the dummy pixels among the input display data corresponding to each display pixel in the effective display region;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of rows is given to the corresponding dummy pixels, while the average gradation value calculated in units of columns is given to the dummy pixels corresponding to each column, In the measurement timing of deterioration, a process of giving a gradation value for measurement to all the dummy pixels,
A process of calculating an average luminance of each emission luminance measured for each of the dummy pixels, and detecting a cumulative deterioration amount that has occurred until the measurement time point;
A process of calculating a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A computer program for causing a computer to execute a process of updating a gradation value / deterioration characteristic conversion table for calculating a unit deterioration amount with a calculated correspondence relationship. In the case where one dummy pixel in a plurality of rows and one column in a plurality of effective display areas and a detection sensor for detecting the emission luminance of the dummy pixels are arranged outside the effective display area, the unit of each pixel A computer program that realizes update processing of a gradation value / deterioration characteristic conversion table that is referred to in calculating a deterioration amount,
A process of calculating an average gradation value in units of row blocks and an average gradation value in units of column blocks of the input display data corresponding to each display pixel in the effective display area;
Until the measurement timing of luminance degradation, the average gradation value calculated in units of row blocks is given to at least one dummy pixel corresponding to each block, while the average gradation value calculated in units of column blocks is given to each column block To the at least one dummy pixel corresponding to, and at the measurement timing of the luminance degradation, a process of giving a gradation value for measurement to all the dummy pixels;
A process of calculating an average luminance of each emission luminance measured for each of the dummy pixels, and detecting a cumulative deterioration amount that has occurred until the measurement time point;
A process of calculating a deterioration rate within the measurement period based on the detected cumulative deterioration amount;
Calculate the correspondence between the calculated deterioration rate and all other gradation values except the average gradation value and the deterioration rate so as to satisfy the basic table that defines the basic correspondence between the average gradation value and the deterioration rate, A computer program for causing a computer to execute a process of updating a gradation value / deterioration characteristic conversion table for calculating a unit deterioration amount with a calculated correspondence relationship.

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