JP5483477B2 - Display device, display control method thereof, and display control program - Google Patents

Description

  The present invention relates to an improvement of a display device capable of adjusting luminance for each pixel, a display control method thereof, and a display control program.

  A decoder that generates display color and luminance control data for one frame in units of pixels based on color information and luminance information in units of pixels sent from the host device in units of one frame, and a data transmission path In addition, a display device that includes a display module that receives control data from a decoder and adjusts the display color and brightness of each pixel to sequentially display an image for one frame is already known. As a possible display module, an organic light-emitting diode module is generally used.

Technologies for saving power consumption in this type of display device include contact with the display surface of the display device, cursor operation or screen scroll operation, data input operation, tracking processing for tracking the user's eye position, etc. The display area on the screen in which the user is interested is identified by the above, and the lighting elements in the other area, that is, the area that is assumed not to be interested in the user are dimmed. Proposed as 1.
However, in order to adjust the brightness of the lighting element based on contact with the display surface, cursor operation or screen scrolling operation, data input operation, tracking processing for tracking the position of the user's eyes, etc., these information are used. A physical signal line for transmission from the host device to the display device is required, and there is a disadvantage that the display device cannot be used in an existing host device, that is, a host device without a dedicated signal line. Even if it is possible to add a dedicated signal line to the display, it can perform touch processing on the display surface of the display device, cursor operation or screen scroll operation, data input operation, tracking processing for tracking the user's eye position, etc. Operation system and application program used by the host device. Problems remain such must make various changes to the arm.
In Patent Document 1, the user is interested by touching the display surface of the display device, cursor operation or screen scrolling operation, data input operation, tracking processing for tracking the user's eye position, and the like. The display area on the screen is specified, but the display area that the user should be interested in is not necessarily specified appropriately by these operations. For example, when the display area is specified using the cursor operation, the presence of the cursor on the display screen itself becomes an obstacle, and the cursor may be moved outward from the data input operation area. When such an operation is performed, there is a possibility that inconvenience may occur that an area outside the data input display area that the user should be interested in is determined as a display area that should be interested in. .

As a technique for conserving power consumption in a comprehensive manner related to the display of the display device, when the signal from the microprocessor of the host device is interrupted for a certain time or longer, data is read from the VRAM. While stopping or referring to the window display on the screen, the display of a specific window is performed with a high gradation, for example, 8-bit gradation, while in other display areas, a low gradation, for example, 8-bit Display in the upper 7 bits, or by reducing the period for reading data from the VRAM, or extracting only the pixels that have changed during frame rewriting and rewriting Patent Document 2 proposes to save electric power.
However, this saves power consumption by restricting access to the VRAM, that is, saves power consumption of memory access required for preprocessing for image display. It does not save the power consumption required for display.

JP 2009-193075 (paragraph 0031, paragraph 0033, paragraph 0037) Japanese Patent Laid-Open No. 9-198816 (paragraph 0031, paragraphs 0037-0038, paragraph 0044, paragraph 0047)

  An object of the present invention is that data other than color information and luminance information essential for image display is not required, and the user should be interested even if there is no special signal line, application, or operation system in the host device. An object of the present invention is to provide a display device, a display control method thereof, and a display control program capable of saving power consumption by a single display device without adversely affecting the display of a display area.

The display device of the present invention is a decoder that generates display data and luminance control data for one frame in units of pixels based on color information and luminance information in units of pixels sent from the host device in units of one frame. And a display module that receives control data from the decoder via a data transmission path, and adjusts the display color and brightness of each pixel to display an image for one frame sequentially.
A high-level device comprising a memory having a color information storage area for storing color information in units of pixels for one frame, and a coincidence count storage area for storing the number of color information matches in units of pixels with the number of frame receptions from the high-level device as units Each time one frame of color information and luminance information is sent, the color information sent from the host device and the color information stored in the color information storage area of the memory at the same position on the frame do not match. determined in pixels, when they coincide with each other, while incrementing the match count of the matching count storage area corresponding to this pixel, if the codes do not match, matching count storage area corresponding to this pixel The color information sent from the host device is updated and stored in the color information storage area corresponding to the pixel, and stored in the match count storage area. On the basis of the number of coincidence for each pixel and the frame data transfer period, the time for which the color information coincides with each pixel is obtained, and this time exceeds the preset time. A comparison detector for detecting a pixel as a pixel in which the color information match state continues for a preset time;
Control data related to the brightness of the control data corresponding to the pixels detected by the comparison detector, among the control data from the decoder, arranged between the decoder and the display module on the data transmission path, Correction is performed so that the luminance is lower than the luminance corresponding to the luminance information of the pixel transmitted from the host device, and the display module together with the control data related to the display color of the pixel and the control data of other pixels It has a configuration characterized in that a brightness correction device is provided.

Also, the display control method of the present invention provides display data and luminance control data for one frame in units of pixels based on the color information and luminance information in units of pixels sent from the host device for each frame. In a display control method for a display device that generates and adjusts the display color and brightness for each pixel based on this control data and sequentially displays an image for one frame on the display module.
A display device is provided with a memory having a color information storage area for storing pixel-unit color information for one frame and a coincidence count storage area for storing the number of color information matches on a pixel-by-pixel basis. Deploy ,
Each time color information and luminance information for one frame are sent from the host device , the color information sent from the host device and the color information stored in the color information storage area of the memory at the same position on the frame . Judge the match by pixel,
If they match, the match count in the match count storage area corresponding to this pixel is incremented by 1. On the other hand, if they do not match, the value of the match count storage area corresponding to this pixel is initialized to The color information sent from the host device is updated and stored in the color information storage area corresponding to the pixel ,
Based on the number of matches for each pixel stored in the match count storage area and the frame data transfer period, the time for which the color information match state continues for each pixel is obtained, and this time is calculated in advance. pixels exceeds the set time is detected as the pixel matching state of the color information is continued beyond a preset time,
Among the generated control data, control data related to the brightness of the control data corresponding to the pixel in which the color information match state continues for a preset time is received from the host device corresponding to the pixel. After correcting the luminance to be lower than the luminance corresponding to the transmitted luminance information, it is transferred to the display module together with the control data related to the display color of the pixel and the control data of other pixels. It has the structure characterized by these.

The display device display control program of the present invention obtains display data and luminance control data for one frame based on the color information and luminance information in units of pixels sent from the host device for each frame. A decoder that generates pixel units, a display module that receives control data from the decoder via a data transmission path, adjusts the display color and brightness of each pixel, and sequentially displays an image for one frame; and a pixel unit A display device comprising: a color information storage area for storing one frame of color information; and a memory having a coincidence number storage area for storing the number of color information matches in units of pixels with the number of frame receptions from the host device as a unit. Implemented microprocessor,
Each time color information and luminance information for one frame are sent from the host device, the color information sent from the host device and the color information stored in the color information storage area of the memory at the same position on the frame. When coincidence / non-coincidence is determined in units of pixels, and the two match, the number of matches in the match count storage area corresponding to this pixel is incremented by one. The value of the storage area is initialized, the color information sent from the host device is updated and stored in the color information storage area corresponding to the pixel, and the number of matches for each pixel stored in the match count storage area on the basis of the transfer period of the frame data, obtains a time matching state continues color information for each pixel, a pixel that this time exceeds the time the preset, Comparison detection means for detecting a pixel in which the color information match state continues for a preset time, and control data corresponding to the pixel detected by the comparison detection means among the control data from the decoder The control data relating to the display color of the pixel is corrected so that the control data relating to the brightness of the pixel is lower than the luminance corresponding to the luminance information of the pixel sent from the host device, and other pixels And a control unit for functioning as brightness correction means to be transferred to the display module.

  The display device of the present invention, its display control method, and display control program are configured to detect the coincidence / non-coincidence between the color information in units of pixels and the color information of the previous frame on the frame. By comparing pixels at the same position in units of pixels, a pixel in which the color information coincides with the preset time is detected, and control data corresponding to the pixel is corrected, and a command from the host device is used. Since the brightness is lower than the brightness, even if there is no special signal line or application or operation system in the host device, the pixels where the color information match state continues, that is, the user does not change the image. The display device alone can save power by appropriately limiting only the brightness of the display area where there is little need for interest. In addition, pixels in which the color information matching state changes sequentially, that is, a display area in which an image is changed by a user's input operation or display of response information by a host device, that is, the necessity of actual user interest It is possible to appropriately maintain the brightness of the display area having a high brightness.

It is the block diagram shown about the outline of the structure of the display apparatus of one Embodiment to which this invention is applied. It is the flowchart which showed the outline of the structure of the display control program for display apparatuses for functioning the microprocessor mounted in the display apparatus of the embodiment as a comparison detector and a brightness correction device. It is the continuation of the flowchart which showed the outline of the structure of the display control program for display apparatuses. FIG. 4A is a conceptual diagram showing a display example when a window is displayed on a display module of a display device and a user confirms character information displayed in the window while scrolling the window up and down; FIG. 4B shows the display state at the start of scrolling, and FIG. 4B shows the display state during scrolling. It is the flowchart shown about an example of the correction execution flag setting process which can be used when correct | amending a brightness | luminance according to the length of the continuous time of the matching state of color information. The correction execution flag setting processing for each divided area in which the number of pixels in which the color information match state is continued is counted for each divided area, and the pixels in which the color information match state is continued are detected on an area basis. It is the flowchart shown about an example.

  Next, some embodiments for carrying out the present invention will be specifically described with reference to the drawings.

  FIG. 1 is a block diagram showing an outline of a configuration of a display device 1 according to an embodiment to which the present invention is applied.

  The display device 1 according to this embodiment includes a display color for one frame on the basis of color information and luminance information in units of pixels constituting an image sent together by one frame from a computer 2 functioning as a host device. The decoder 3 that generates brightness control data in units of pixels, and the control data from the decoder 3 via the data transmission path 4, adjusts the display color and brightness for each pixel, and sequentially generates an image for one frame. The display device includes a display module 5 for displaying, and the display module 5 includes an organic light emitting diode module.

Since the configuration and function of the display module 5 constituted by the decoder 3, the data transmission path 4, and the organic light emitting diode module are already known, detailed description thereof will be omitted.
In this embodiment, the dots of the display module 5 are present in a matrix of x columns in the horizontal direction and y rows in the vertical direction.

  In the display device 1 of this embodiment, the color information in units of pixels sent from the computer 2 functioning as a higher-level device for each frame and the color information of the previous frame are identical or inconsistent on the frame. A comparison detector 6 for detecting a pixel in which the color information coincides with a predetermined time by comparing the position in units of pixels, and a decoder 3 and a display module 5 on the data transmission path 4 Among the control data from the decoder 3, the control data corresponding to the pixels detected by the comparison detector 6 as being in a state where the color information coincides with the preset time. The control data related to the brightness is corrected so that the brightness is lower than the brightness corresponding to the brightness information of the pixel sent from the computer 2. Control data concerning the display color of the pixel, and includes a luminance corrector 7 to pass to the display module 5 along with the control data of other pixels.

  The comparison detector 6 stores a color information storage area for storing color information in units of pixels for one frame and a number of matches in which the number of matches of color information is stored in units of pixels with the number of times frame data is received from the computer 2 as a unit. Each time one frame of color information and luminance information is sent from the computer 2, the color information sent from the computer 2 and the color information stored in the memory 8 are stored at the same position on the frame. If the color information stored in the area is determined to be inconsistent with the color information and if both match, the number of matches stored in the match count storage area corresponding to this pixel is incremented by 1, while the two match. If not, the value of the number of matches in the match count storage area corresponding to this pixel is initialized and stored in the color information storage area corresponding to that pixel. The color information sent from the computer 2 is updated and stored, and the color information for each pixel is based on the number of matches for each pixel stored in the match count storage area and the frame data transfer period from the computer 2. A function is provided for obtaining a time during which the information matching state continues and detecting a pixel in which this time exceeds a preset time.

  In the memory 8 in this embodiment, in addition to the above-described color information storage area and coincidence count storage area, a program storage area for storing the display control program for the display device, and the latest information displayed on the display module 5 of the display 1 are displayed. A frame memory unit for temporarily storing image information, that is, color information and luminance information for one frame sent from the computer 2, a flag storage area for storing various flag values used for display control, and the like Is provided.

More specifically, in the frame memory unit of the memory 8, the latest color information for one frame sent from the computer 2 becomes the respective positions of the pixels in the y rows and x columns of the display module 5 (i, j ) Temporarily stored in pixel units in the form of C _ij corresponding to the spot (where i is an integer from 1 to y and j is an integer from 1 to x).
Further, in the color information storage area of the memory 8, color information for one frame to be used for determination of coincidence / non-coincidence of color information is stored in each position (i, j) of the pixel in the y row x column of the display module 5. _Are stored in pixel units in the form of CP _ij . The color information stored in the color information storage area of the memory 8 is generally the color information one frame before, but at the time of initialization immediately after the power is turned on, all the color information in the color information storage area is erased.
In the coincidence number storage area of the memory 8, the coincidence number of the color information at each position (i, j) of the pixel in the y row and x column of the display module 5 is stored in units of pixels in the form of n _ij .
Further, in the flag storage area of the memory 8, the value of the correction execution flag indicating whether or not the luminance correction at each position (i, j) of the pixel in the y row x column of the display module 5 should be executed is F _ij. In this form, it is stored in pixel units.

  2 to 3 are stored in a program storage area of the memory 8 so that the microprocessor 9 mounted on the display device 1 functions as a comparison detector 6 (comparison detection means) and a luminance correction device 7 (luminance correction means). 6 is a flowchart showing an example of the configuration of a display control program for a display device.

When the display device 1 is powered on, the microprocessor 9 firstly stores the color information CP _{11 to} CP _yx stored in the color information storage area of the memory 8 that stores color information in units of pixels for one frame. the initialize all 0 values of match count _n 11 _{~n yx} corresponding to each color information of _CP 11 _{~ CP yx} is initialized to the state of the unstored (step S1), the computer functioning as a host device A standby state is entered in which image data for 2 to 1 frame, that is, color information and luminance information for each pixel are input (step S2).

When image data for one frame is input from the computer 2, the microprocessor 9 obtains the latest one frame of color information sent from the computer 2 in the frame memory of the memory 8 in the form of C _ij in units of pixels. Are temporarily stored (step S3), the value of the row search index i is initialized to 0, and the value of the column search index j is initialized to 0 (step S4, step S5).

  Next, the microprocessor 9 increments the value of the row search index i by 1 (step S6), and whether or not the current value of the row search index i exceeds the value of the number y of pixels in the row direction of the display module 5, that is, Then, it is determined whether or not there is still a line having a pixel whose color information matches or not to be compared (step S7).

  If the current value of the row search index i does not exceed the value of the number y of pixels in the row direction of the display module 5, a row having pixels whose color information matches or does not match remains in the frame. Therefore, the microprocessor 9 increments the value of the column search index j by 1 (step S8), and determines whether or not the current value of the column search index j exceeds the value of the number x of pixels in the column direction of the display module 5. That is, it is determined whether or not there is still a pixel whose color information matches or does not match among the pixels for one row specified by the value of the row search index i (step S9).

Here, if the current value of the column search index j does not exceed the value of the number x of pixels in the column direction of the display module 5, the microprocessor 9 functioning as the comparison detector 6 determines the value of the row search index i and the column search. The value of the color information C _ij is read from the frame memory unit of the memory 8 based on the current value of the index j, and the color information storage of the memory 8 is similarly performed based on the value of the row search index i and the current value of the column search index j. The value of the color information CP _ij is read from the area (step S10), and the coincidence mismatch between the value of the color information C _ij of the (i, j) spot at the same position on the frame and the value of the color information CP _ij is determined in pixel units. (Step S11).

If the value of the color information C _ij sent from the computer 2 in this transfer process matches the value of the color information CP _ij one frame before, the position of the (i, j) spot on the frame, that is, This means that the display color at the pixel position of the (i, j) spot of the display module 5 has not changed, so that the microprocessor 9 functioning as the comparison detector 6 accesses the coincidence count storage area of the memory 8. Then, the value n _ij of the color information corresponding to the position of the (i, j) spot on the frame is incremented by 1 (step S16).

On the other hand, if the value of the color information C _ij sent from the computer 2 in this transfer process does not match the value of the color information CP _ij one frame before, the (i, j) spot of the frame is detected. This means that the display color at the position, that is, the position of the (i, j) spot of the display module 5 has changed, so that the microprocessor 9 functioning as the comparison detector 6 accesses the color information storage area of the memory 8. Then, the value of the color information CP _ij in the color information storage area of the memory 8 is updated and stored with the value of the color information C _ij sent from the computer 2 in the current transfer process (step S12), and (i, j ) The value _nij of the color information corresponding to the spot position is initialized to 0 again (step S13).
In the process of step S11 executed immediately after the power is turned on, the values of the color information CP _ij in the color information storage area of the memory 8 are all initialized. Is false.

Next, the microprocessor 9 functioning as the comparison detector 6 determines whether or not the value of the color information coincidence number n _ij corresponding to the position of the (i, j) spot on the frame exceeds the set value ε. That is, it is determined whether or not the time during which the color information of the pixel information of the (i, j) spot continues exceeds a preset time Δt · ε (step S14).
However, since the transfer period Δt of the frame data from the computer 2 is constant, it is not necessary to dare to calculate Δt · n _{ij in} order to obtain the duration time of the color information matching state, and simply calculate n _ij and ε It is sufficient to compare the magnitude relationships.

When the value of the color information matching number n _ij corresponding to the position of the (i, j) spot on the frame exceeds the set value ε, the microprocessor 9 functioning as the comparison detector 6 Then, the flag storage area of the memory 8 is accessed, and a value 1 indicating that luminance correction should be executed is set in the correction execution flag F _ij in the flag storage area of the memory 8 (step S15). (I, j) If the value n _ij of the color information corresponding to the spot position does not exceed the set value ε, the correction execution flag F _ij in the flag storage area of the memory 8 has the brightness A value 0 indicating that there is no need to execute correction is set (step S17).

Therefore, the pixel of the spot (i, j) in which the value 1 is set in the correction execution flag F _ij is detected as a pixel in which the color information coincides with the preset time Δt · ε. It will be.

Then, the microprocessor 9 determines the value of the column search index j until the value of the column search index j exceeds the value of the number x of pixels in the column direction of the display module 5 until the determination process in step S9 detects. The processing in steps S8 to S17 is selected in the same manner as described above based on the correspondence between the color information C _{ij in} the i-th row and the color information CP _ij (where j is an integer from 2 to x). Repeatedly.

In addition, whenever it is detected in the determination process in step S9 that the value of the column search index j exceeds the value of the number x of pixels in the column direction of the display module 5, the microprocessor 9 again performs a process in step S5. The value of the search index j is initialized to 0, and the value of the row search index i is incremented in the process of step S6, and the value of the row search index i exceeds the value of the number y of pixels in the row direction of the display module 5. Are detected one after another in the determination process of step S7, and the correspondence relationship between the color information C _ij and the color information CP _ij (where i is an integer from 2 to y and j is an integer from 1 to x) In the same manner as described above, the processes in steps S8 to S17 are selectively repeated based on the above.

Finally, the determination result in step S7 becomes true, and the correspondence between the color information C _ij and color information CP _ij (where i is an integer from 1 to y and j is an integer from 1 to x) in i row and j column. Color information matching / unmatching determination processing (see step S11) and color information CP _ij update processing and matching count n _ij initialization processing (see steps S11 to S13), or color information When it is confirmed that the increment processing (see step S16) of the number of matches n _ij has been completed, the microprocessor 9 functioning as the brightness corrector 7 accesses the flag storage area of the memory 8 and (i, j) correction execution flag F _ij corresponding to the position of the spot _(where, i is an integer of 1 to y, j refers to the value of the integer) of 1 to x, of the control data from the decoder 3 Comparator detector 6 corresponding control data to the detected pixel by, i.e., the control data relating to the luminance of the set 1 as the value of the correction execution flag F _ij spot, sent from the computer 2 is a host apparatus such Correction is made so that the luminance is lower than the luminance corresponding to the luminance information of the pixel, and it is transferred to the display module 5 together with the control data related to the display color of the pixel and the control data of other pixels (step S18). 5 displays an image based on these control data.

Therefore, suppose that the color information of the (1, 1) spot on the frame data sent from the computer 2 is C ₁₁ and the luminance information is D ₁₁ , and (1, 2) on the frame data sent from the computer 2. color information of the spot is a _{D 12} is luminance information at _{C 12,} the value of the correction execution flag _{F 11} is 1, also if the value of the correction execution flag _{F 12} is 0, (1,1) spot control data D ₁₁ according to the luminance generated by the decoder 3 on the basis of the luminance information D _{11 ',} the control data D ₁₁ to have a lower luminance than the luminance of the final display result is equivalent to the luminance information D _11' is corrected to the control data D _{11 "from} and passed to the display module 5 along with the control data C _{11 'according} to the display color produced is the decoder 3 on the basis of the display color C ₁₁ of the pixel. also, (1, ) Remains luminance information D ₁₂ control data D _{12 'control} data D ₁₂ without the receiving whatsoever of _correction' in accordance with luminance generated by the decoder 3 on the basis of the spot, the decoder based on the display color C ₁₂ of the pixel 3 is transferred to the display module 5 together with the control data C ₁₂ ′ relating to the display color generated.

The processing for lowering the luminance of the (i, j) spot for which the correction execution flag F _ij is set to 1 is generated by the decoder 3 based on the luminance information D _ij of the (i, j) spot, for example. A method of setting the control data D _ij ″ by overriding a certain coefficient (for example, 80%) to the control data D _ij ′ related to the brightness, or the control data D _ij so that the brightness is lowered by a preset brightness. A method is conceivable in which the value of 'is shifted and adjusted to control data D _ij ".

  FIG. 4 is a conceptual diagram showing a display example in which the window 10 is displayed on the display module 5 of the display device 1 and the user confirms the character information displayed in the window 10 while scrolling the window 10 up and down. Yes, FIG. 4A shows a display state at the start of scrolling, and FIG. 4B shows a display state while the window 10 is being scrolled upward.

  “MN OPQ”, “RSTUVW”, etc., which are part of character information, are located on the left side in the window 10 as a whole, and “JKL”, “XYZ”, which are other parts of character information, are in the window 10 as a whole. Although the character information moves so as to flow in the vertical direction in the window 10 while maintaining the relative positional relationship, the color information at any spot in the window 10 Is periodically changed to the character display color and the background color, but at the spot position outside the window 10, the color information is always maintained as the background color or the drawing color of a figure such as a circle or rectangle. .

As a result, the color information periodically fluctuates at the position of each spot (pixel) included in the window 10, and each time the color information coincidence value is initialized to 0 by the processing of step S11 to step S13. Therefore, the number of coincidence of the color information corresponding to the pixels of these spots does not reach the set value ε, and the value of the corresponding correction execution flag is kept at 0 by the processes of step S14 and step S17. It is. Therefore, the brightness correction process is not performed on the spots in the window 10, and the brightness in the window 10 is maintained at the brightness commanded by the computer 2.
In addition, the color information remains the background color or the drawing color of a figure such as a circle or a rectangle at the position of each spot outside the window 10, and the number of times the color information matches is sequentially added in the processing of step S11 and step S16. Since the number of coincidence exceeds the set value ε, and the value of the correction execution flag corresponding to the pixel of these spots is set to 1 in the processing of step S14 to step S15, the display outside the window 10 is displayed. Only the brightness of the area is reduced by the correction process.

As described above, since the brightness of the spot where the color information fluctuates is maintained without referring to the display position of the cursor, etc., the brightness of the spot where the color information does not fluctuate is reduced. And the brightness of the display area in which the image is changed due to the display of response information by the computer 2, that is, the display area that is actually highly necessary for the user, can be held as instructed from the computer 2. Moreover, it is possible to directly reduce the power consumption itself required for the image display of the display device 1 by reducing the brightness of other display areas that are less necessary for the user than the brightness commanded by the computer 2. it can.
The decrease in brightness may adversely affect the visibility, but the value of the information displayed by the pixel is relatively low, so there is no risk of a particular hindrance due to the decrease in visibility. .
Further, since the selection of the pixel whose luminance should be reduced can be extracted only from the color information contained in the image display data transferred from the computer 2 as the host device, no special selection operation by the user is required, and the display device from the computer 2 is not required. There is no need to give a special command to 1. Therefore, there is no need to add special signal lines other than those required for image display, and the existing computer 2 can use the display device 1 excellent in power saving effect as it is.

[Modification 1]
Further, according to the length of the matching state duration of the color information of the pixel detected by the comparison detector 6, the control data relating to the brightness is set such that the longer the duration of the matching state, the lower the brightness of the pixel. The brightness corrector 7 can also have a function of correcting

In order to realize such a function, instead of the processing in steps S14 to S15 and S17 shown in FIG. 3, for example, a correction execution flag setting processing as shown in FIG. When the value n _ij of the color information corresponding to the position of (i, j) spot of the image exceeds the value of the set value ε ₃ , the correction execution flag F _ij in the flag storage area of the memory 8 has a luminance value. A value 3 indicating that correction is to be executed is set (step a1, step a7), and if the value of the number of matches n _ij exceeds the set value ε _{2 and} is equal to or less than the set value ε ₃ , sets a value 2 indicating that it should perform the correction of the brightness in the correction execution flag F _ij in flag storage area of the memory 8 (step a2, step a6), further, the value of the matching count n _ij is the set value epsilon ₁ If a is set value epsilon ₂ or less beyond, while setting a value 1 indicating that it should perform the correction of the brightness in the correction execution flag F _ij in flag storage area of the memory 8 (step a3, step a5) In other cases, that is, when the value of the number of matches n _ij does not reach the set value ε ₁ , it is necessary to perform luminance correction on the correction execution flag F _ij in the flag storage area of the memory 8. A value 0 indicating that there is no data is set (step a3, step a4).

In this case, the color information coincides with the pixel of the (i, j) spot in which the correction execution flag F _ij is set to a value other than 0 over the preset time Δt · ε ₁ . It is detected as a pixel.

The magnitude relationship of the set values is ε ₁ <ε ₂ <ε ₃ , and the longer the duration of the color information matching state, the larger the value of the correction execution flag F _ij .

Then, in a process in place of step S18 shown in FIG. 2, the microprocessor 9 functioning as the luminance corrector 7 accesses the flag storage area of the memory 8 and performs correction corresponding to the position of the (i, j) spot on the frame. With reference to the value of the execution flag F _ij , control data corresponding to the pixel detected by the comparison detector 6 among the control data from the decoder 3, that is, a value other than 0 is set as the value of the correction execution flag F _ij The control data related to the brightness of the spot is corrected so that the brightness becomes lower than the brightness corresponding to the brightness information of the pixel sent from the computer 2 as the host device.

However, in this case, depending on the value of the correction execution flag F _ij, the larger the value of the correction execution flag F _ij, i.e., the duration of coincidence state of the color information of the detected pixel by comparing the detector 6 The control data related to the brightness of the control data is corrected so that the longer the length, the lower the brightness of the pixel.

For example, when the value of the correction execution flag F _ij is 1, a constant coefficient (for example, 85) is _{added to the} control data D _ij ′ related to the brightness generated by the decoder 3 based on the brightness information D _ij of (i, j) spot. %) Is overridden to correct the control data D _ij ′ to control data D _ij ″, and when the value of the correction execution flag F _ij is 2, (i, j) based on the brightness information D _ij of the spot Then, the control data D _ij ′ generated by the decoder 3 is overridden with a constant coefficient (for example, 70%) smaller than the above to correct the control data D _ij ′ to the control data D _ij ″, and the correction is executed. When the value of the flag F _ij is 3, the control data D _ij ′ relating to the brightness generated by the decoder 3 based on the brightness information D _ij of the (i, j) spot, a constant coefficient smaller than the above (for example, For example, 55%) is overridden to correct the control data D _ij ′ to the control data D _ij ″.

Since the lengths of the set times Δt · ε ₁ , Δt · ε ₂ , Δt · ε ₃ when reducing the luminance are affected by the transfer period Δt, the values of the set values ε ₁ , ε ₂ , and ε ₃ are the transfer periods Δt. It is desirable to decide appropriately considering the value of.
In addition, since there is a difference in the range of luminance that can be expressed depending on the configuration of the display module 5, the coefficient (override value) for reducing the luminance is appropriately determined in consideration of the characteristics of the display module 5 and the visibility problem. Is desirable.

[Modification 2]
Furthermore, the number of pixels in which the color information match state continues over a preset time is counted for each divided area that defines the frame, and the number exceeds a preset threshold value. The comparison detector 6 can be provided with a function of detecting all pixels belonging to this divided area as pixels in which the color information coincides with each other over a preset time.

  In order to realize such a function, instead of the process in step S18 shown in FIG. 2, a divided area correction execution flag setting process as shown in FIG. 6 is applied.

Here, as an example, when the display area of the display module 5 having pixels of y rows and x columns is divided by an area consisting of rectangular areas of m rows and k columns, that is, the display areas of the display module 5 are equally spaced in the vertical direction. An example will be described in which y / m is divided and x / k is divided at equal intervals in the horizontal direction.
However, it is assumed that m <y, k <x, and both y / m and x / k are integer values.

  The microprocessor 9 that has started the process for setting the correction execution flag for each divided area first initializes the value of the vertical direction search index i ′ to 0 (step b1) and initializes the value of the horizontal direction search index j ′ to 0. (Step b2).

  Next, the microprocessor 9 increments the value of the vertical direction search index i ′ by 1 (step b3), and whether the current value of the vertical direction search index i ′ exceeds the vertical division number y / m in the display module 5 or not. No, that is, a divided row (a group of horizontally arranged divided areas) having a divided area in which the number of pixels whose color information coincides with each other over a preset time Δt · ε should be counted is within the frame. Whether or not still remains is determined (step b4).

  If the current value of the vertical direction search index i ′ does not exceed the vertical division number y / m in the display module 5, the color information match state continues beyond a preset time Δt · ε. This means that there is still a division row having a division area in which the number of pixels to be counted remains in the frame, so that the microprocessor 9 increments the value of the horizontal search index j ′ by 1 (step b5). Whether or not the current value of the horizontal search index j ′ exceeds the horizontal division number x / k in the display module 5, that is, the number of divided lines for one line specified by the value of the vertical search index i ′. It is determined whether or not there is still a divided area in which the number of pixels in which the color information match state continues for a preset time Δt · ε remains (step b6).

  Here, if the current value of the horizontal search index j ′ does not exceed the horizontal division number x / k in the display module 5, the microprocessor 9 functioning as the comparison detector 6 stores in the flag storage area of the memory 8. Access and execute m · k corrections corresponding to pixels included in one divided area (i ′, j ′) specified by the value of the vertical search index i ′ and the current value of the horizontal search index j ′. All the flag values are searched, and the total number of correction execution flags set to a value 1 indicating that the color information coincides with the preset time Δt · ε is continued. (Step b7).

  Next, the microprocessor 9 functioning as the comparison detector 6 detects the pixel detected from the divided area (i ′, j ′) as the color information matching state continues for a preset time Δt · ε. It is determined whether or not the total number n 'exceeds a preset threshold value v (step b8).

The total number n ′ of pixels detected from the divided area (i ′, j ′) is assumed to be a preset threshold value v, assuming that the color information coincides with the preset time Δt · ε. If exceeded, the microprocessor 9 functioning as the comparison detector 6 accesses the flag storage area of the memory 8, and the area correction execution flag F ′ _{i′j ′} corresponding to the divided area (i ′, j ′). 1 is set to a value 1 for declaring that all the pixels included in this divided area are treated as pixels in which the color information match state continues (step b9). In other cases, the divided area is set. A value 0 is set to the area correction execution flag F ′ _{i′j ′} corresponding to (i ′, j ′) (step b10).

Accordingly, the division corresponding to the area correction execution flag F ′ _{i′j ′} set to the value 1 is set regardless of the value of the correction execution flag set in the processing of step S15 or step S17 corresponding to each pixel. All the pixels included in the area (i ′, j ′) are detected as pixels in which the color information match state continues for a preset time.
It should be noted that in light of the first embodiment, this situation is that brightness correction should be performed on all correction execution flags corresponding to each pixel included in the divided area (i ′, j ′). This is the same situation as when the value 1 indicating “” is set.

Then, the microprocessor 9 continues in the horizontal direction until the determination in step b6 detects that the value of the horizontal search index j ′ exceeds the value of the horizontal division number x / k of the display module 5. While sequentially incrementing the value of the search index j ′, the total number n ′ of pixels in which the color information match state continues for a preset time Δt · ε is extracted from the divided area (i ′, j ′). The processing from step b5 to step b10 for setting the value of 1 or 0 to the area correction execution flag F ′ _{i′j ′} (where j ′ is an integer of 2 to x / k) based on the value is as described above. Similarly, it is repeatedly executed repeatedly.

In addition, every time the determination processing in step b6 detects that the value of the horizontal search index j ′ exceeds the value of the horizontal division number x / k of the display module 5, the microprocessor 9 revisits step b2. In step S3, the value of the horizontal direction search index j ′ is initialized to 0, and in step b3, the value of the vertical direction search index i ′ is incremented. The area correction execution flag F ′ _{i′j ′} corresponding to each divided area (i ′, j ′) is detected until the determination of step b4 detects that the direction division number y / m has been exceeded. (Where i ′ is an integer from 2 to y / m and j ′ is an integer from 1 to x / k), the processing from step b5 to step b10 is selectively repeated in the same manner as described above.

Finally, the determination result in step b4 becomes true, and the area correction execution flag F ′ _{i′j ′} (where i ′ is corresponding to each of the (y / m) · (x / k) divided areas) When it is confirmed that a numerical value of 1 or 0 is set for all of the integers 1 to y / m and j ′ is an integer of 1 to x / k), the microprocessor 9 that functions as the luminance corrector 7 However, the flag storage area of the memory 8 is accessed and the area correction execution flag F ′ _{i′j ′} corresponding to each divided area (where i ′ is an integer from 1 to y / m and j ′ is from 1 to x / k). The control data corresponding to the pixel detected by the comparison detector 6 among the control data from the decoder 3, that is, the value of the area correction execution flag F ′ _{i′j ′} is 1 Control data related to the brightness of each pixel included in the divided area. Is corrected so as to have a luminance lower than the luminance corresponding to the luminance information of each pixel sent from the computer 2 which is the host device, and the control data relating to the display color of the pixel and the control of other pixels are corrected. The data is transferred to the display module 5 together with the data (step b11), and the display module 5 displays an image based on these control data.

Accordingly, for example, when m · k−1 is set as the value of the threshold value v, all the m · k pixels included in the divided area (i ′, j ′) are set to a preset time Δt. This divided area (i ′, j) only when the color information match state is continued beyond ε (when n ′ = m · k, v = m · k−1, where n ′> v). The brightness of all the pixels in m rows and k columns contained in ') is reduced,
In addition, when m · k−2 is set as the value of the threshold value v, all the m · k pixels included in the divided area (i ′, j ′) have a preset time Δt · ε. And the color information match state is continued (when n ′ = m · k, v = m · k−2 where n ′> v), and included in the divided area (i ′, j ′). When there is only one pixel among the m · k pixels that does not continue the color information matching state beyond the preset time Δt · ε (n ′ = m · k−1, v = m · In the case of n−> v at k−2), the luminance of all the pixels in m rows and k columns included in this divided area (i ′, j ′) is reduced,
Further, when m · k−3 is set as the value of the threshold value v, all the m · k pixels included in the divided area (i ′, j ′) are set to a preset time Δt · ε. And the color information match state is continued (when n ′ = m · k, v = m · k−3, where n ′> v), and included in the divided area (i ′, j ′). When there is only one pixel among the m · k pixels that does not continue the color information matching state beyond the preset time Δt · ε (n ′ = m · k−1, v = m · color information matching state over a preset time Δt · ε among m · k pixels included in the divided area (i ′, j ′). If there are only two pixels that did not continue (when n ′ = m · k−2 and v = m · k−3, where n ′> v), this divided area (i ′, j ′) Brightness of all pixels of m rows and k columns included so that is dropped.

  As described above, the value of the threshold value v can be arbitrarily set as an integer in the range of m · k−1 to 0. Therefore, the condition for reducing the luminance of the divided area can be arbitrarily set according to the user's request. There is an advantage that it can be set.

Further, since the brightness commanded by the computer 2 is held or reduced in units of divided areas including m · k pixels, the brightness in pixel units is different from the organic light emitting diode module. The technical idea of the present invention can also be applied to a display module of a type that cannot be adjusted, for example, a display module comprising a combination of a liquid crystal display panel and a plurality of LED backlights that illuminate the divided areas of the liquid crystal display panel. .
In this case, the number of pixels of m rows and k columns that specify the divided area is determined based on the size and aspect ratio of the LED backlight.

  A part or all of the embodiment disclosed above can be appropriately expressed by the description shown in the following supplementary notes, but the form for carrying out the invention and the technical idea of the invention are not limited to these. Absent.

[Appendix 1]
A decoder (3) that generates display data and luminance control data for one frame in units of pixels based on color information and luminance information in units of pixels sent from the host device (2) in units of one frame; A display module (5) that receives control data from the decoder (3) via the data transmission path (4), adjusts the display color and brightness of each pixel, and sequentially displays an image for one frame. In the display device provided,
Preset time by matching the pixel unit color information sent from the host device (2) one frame at a time and the color information of the previous frame by pixel unit at the same position on the frame A comparison detector (6) for detecting pixels in which the color information match state continues beyond
It is arranged between the decoder (3) and the display module (5) on the data transmission path (4), and is detected by the comparison detector (6) out of control data from the decoder (3). The control data related to the luminance of the control data corresponding to the pixel is corrected so that the luminance is lower than the luminance corresponding to the luminance information of the pixel sent from the host device (2), and the display color of the pixel A display device (1), comprising a brightness corrector (7) to be transferred to the display module (5) together with control data relating to the control data and control data of other pixels.

[Appendix 2]
The comparison detector (6) stores the number of matching color information in units of pixels, using the color information storage area for storing color information in units of pixels for one frame and the number of frames received from the host device (2) as units. A memory (8) having a match count storage area;
Each time color information and luminance information for one frame are sent from the host device (2), the color information sent from the host device (2) and the color information stored in the memory (8) at the same position on the frame. Judge the pixel information for coincidence or inconsistency with the color information stored in the area,
If they match, the match count in the match count storage area corresponding to this pixel is incremented by 1. On the other hand, if they do not match, the value of the match count storage area corresponding to this pixel is initialized to The color information sent from the host device (2) is updated and stored in the color information storage area corresponding to the pixel,
Based on the number of matches for each pixel stored in the match count storage area and the frame data transfer period, the time for which the color information match state continues for each pixel is obtained, and this time is calculated in advance. The display device (1) according to supplementary note 1, wherein a pixel that exceeds a preset time is detected as a pixel whose color information coincides with the preset time.

[Appendix 3]
The luminance corrector (7) determines the luminance of the pixel as the duration of the matching state is longer in accordance with the duration of the matching state of the color information of the pixel detected by the comparison detector (6). The display device (1) according to appendix 1 or appendix 2, wherein the control data relating to the brightness of the control data corresponding to the pixel is corrected so as to be low.

[Appendix 4]
The comparison detector (6) counts the number of pixels in which the color information match state continues over a preset time for each divided area that defines a frame, and the number is preset. If the threshold value is exceeded, all pixels belonging to this divided area are detected as pixels in which the color information match state continues for a preset time, and according to the supplementary note 1 or the supplementary note 2, Display device (1).

[Appendix 5]
The display device (1) according to any one of Supplementary Note 1, Supplementary Note 2, Supplementary Note 3, and Supplementary Note 4, wherein the display module (5) is configured by an organic light emitting diode module.

[Appendix 6]
Based on the color information and luminance information in units of pixels sent from the host device (2) for each frame, the display color and luminance control data for one frame are generated in units of pixels. In the display control method of the display device (1), the display color and brightness of each pixel are adjusted based on the display module (5) to sequentially display an image for one frame.
Pre-set by comparing the pixel unit color information sent from the host device (2) one frame at a time and the color information of the previous frame by pixel unit at the same position on the frame. Detect pixels that match color information over time,
Among the generated control data, control data related to the brightness of the control data corresponding to the pixel in which the color information match state continues for a preset time is sent to the host device (corresponding to the pixel). The display module (5) is corrected together with the control data relating to the display color of the pixel and the control data of the other pixels after the correction is made so that the luminance is lower than the luminance corresponding to the luminance information sent from 2). The display control method of the display device (1), wherein the display device (1) is handed over.

[Appendix 7]
A memory having a color information storage area for storing color information in units of pixels for one frame and a coincidence count storage area for storing the number of matches of color information in units of pixels with the number of times of reception of frames from the host device (2) as units. 8) is deployed in the display device (1),
Each time color information and luminance information for one frame are sent from the host device (2), the color information sent from the host device (2) and the color information stored in the memory (8) at the same position on the frame. Judge the pixel information for coincidence or inconsistency with the color information stored in the area,
If they match, the match count in the match count storage area corresponding to this pixel is incremented by 1. On the other hand, if they do not match, the value of the match count storage area corresponding to this pixel is initialized to The color information sent from the host device (2) is updated and stored in the color information storage area corresponding to the pixel,
Based on the number of matches for each pixel stored in the match count storage area and the frame data transfer period, the time for which the color information match state continues for each pixel is obtained, and this time is calculated in advance. The display control method of the display device (1) according to supplementary note 6, wherein a pixel exceeding a preset time is detected as a pixel whose color information coincides with the preset time.

[Appendix 8]
According to the length of the matching state duration of the color information of the pixel detected as a pixel in which the matching state of the color information continues over a preset time, the longer the matching state duration, The display control method of the display device (1) according to appendix 6 or appendix 7, wherein the control data related to the brightness of the control data corresponding to the pixel is corrected so that the brightness of the pixel is lowered.

[Appendix 9]
Count the number of pixels for which the color information match state continues for a preset time for each divided area that defines the frame, and if this number exceeds a preset threshold, The display device (1) according to appendix 6 or appendix 7, wherein all pixels belonging to the area are detected as pixels in which the color information coincides with each other for a preset time. Display control method.

[Appendix 10]
A decoder (3) that generates display data and luminance control data for one frame in units of pixels based on color information and luminance information in units of pixels sent from the host device (2) in units of one frame; A display module (5) that receives control data from the decoder (3) via the data transmission path (4), adjusts the display color and brightness of each pixel, and sequentially displays an image for one frame. A microprocessor (9) mounted on a display device (1) comprising:
Pre-set by comparing the pixel unit color information sent from the host device (2) one frame at a time and the color information of the previous frame by pixel unit at the same position on the frame. A comparison detection means (6) for detecting a pixel in which the matching state of the color information continues over time, and
Among the control data from the decoder (3), the control data related to the brightness of the control data corresponding to the pixel detected by the comparison detection means (6) is sent to the brightness of the pixel sent from the host device (2). Luminance correction means (7) which corrects the luminance to be lower than the luminance corresponding to the information and delivers it to the display module (5) together with the control data relating to the display color of the pixel and the control data of other pixels. Display control program for a display device, characterized in that it functions as a display device.

  INDUSTRIAL APPLICABILITY The present invention can be used for a display device including an organic light emitting diode module and a display module capable of adjusting luminance in pixel units.

1 Display device 2 Computer (host device)
3 Decoder 4 Data transmission path 5 Display module (organic light emitting diode module)
6 Comparison detector 7 Luminance corrector 8 Memory 9 Microprocessor 10 Window CP _ij Color information C _ij one frame or more before The latest color information n _ij color information of each pixel F _ij correction execution flag i Row search index j Column search index x Number of pixels in the column direction of the display module y Number of pixels in the row direction of the display module ε, ε ₁ , ε ₂ , ε ₃ Set value y / m Number of divisions in the vertical direction x / k Number of divisions in the horizontal direction 'Vertical search index j' Horizontal search index n 'Register v _Preset threshold F'_i'j' Area correction execution flag

Claims (8)

A decoder that generates display color and luminance control data for one frame in units of pixels based on color information and luminance information in units of pixels sent from the host device in units of one frame, and a data transmission path In a display device comprising a display module that receives control data from the decoder and adjusts the display color and luminance for each pixel and sequentially displays an image for one frame,
A high-level device comprising a memory having a color information storage area for storing color information in units of pixels for one frame, and a coincidence count storage area for storing the number of color information matches in units of pixels with the number of frame receptions from the high-level device as a unit Each time one frame of color information and luminance information is sent, the color information sent from the host device and the color information stored in the color information storage area of the memory at the same position on the frame do not match. determined in pixels, when they coincide with each other, while incrementing the match count of the matching count storage area corresponding to this pixel, if the codes do not match, matching count storage area corresponding to this pixel The color information sent from the host device is updated and stored in the color information storage area corresponding to the pixel, and stored in the match count storage area. On the basis of the number of coincidence for each pixel and the frame data transfer period, the time for which the color information coincides with each pixel is obtained, and this time exceeds the preset time. A comparison detector for detecting a pixel as a pixel in which the color information match state continues for a preset time;
Control data related to the brightness of the control data corresponding to the pixels detected by the comparison detector, among the control data from the decoder, arranged between the decoder and the display module on the data transmission path, Correction is performed so that the luminance is lower than the luminance corresponding to the luminance information of the pixel transmitted from the host device, and the display module together with the control data related to the display color of the pixel and the control data of other pixels A display device comprising a hand-over luminance corrector. The luminance corrector is adapted to reduce the luminance of the pixel in accordance with the duration of the matching state of the color information of the pixel detected by the comparison detector so that the longer the duration of the matching state, the lower the luminance of the pixel. The display device according to claim 1, wherein control data related to luminance of control data corresponding to a pixel is corrected. The comparison detector counts the number of pixels in which the color information match state continues for a preset time for each divided area defining the frame, and the number exceeds a preset threshold. 2. The display device according to claim 1, wherein all the pixels belonging to the divided area are detected as pixels in which the color information coincides with each other over a preset time. The display module according to claim 1 is constituted by an organic light emitting diode module of claim 2, the display device according to any one of claims 3. Display data and luminance control data for one frame is generated in units of pixels based on the color information and luminance information in units of pixels sent from the host device for each frame. In a display control method for a display device in which an image for one frame is sequentially displayed on a display module by adjusting a display color and luminance for each pixel,
A display device is provided with a memory having a color information storage area for storing pixel-unit color information for one frame and a coincidence count storage area for storing the number of color information matches on a pixel-by-pixel basis. Deploy ,
Each time color information and luminance information for one frame are sent from the host device , the color information sent from the host device and the color information stored in the color information storage area of the memory at the same position on the frame . Judge the match by pixel,
If they match, the match count in the match count storage area corresponding to this pixel is incremented by 1. On the other hand, if they do not match, the value of the match count storage area corresponding to this pixel is initialized to The color information sent from the host device is updated and stored in the color information storage area corresponding to the pixel ,
Based on the number of matches for each pixel stored in the match count storage area and the frame data transfer period, the time for which the color information match state continues for each pixel is obtained, and this time is calculated in advance. pixels exceeds the set time is detected as the pixel matching state of the color information is continued beyond a preset time,
Among the generated control data, control data related to the brightness of the control data corresponding to the pixel in which the color information match state continues for a preset time is received from the host device corresponding to the pixel. After correcting the luminance to be lower than the luminance corresponding to the transmitted luminance information, it is transferred to the display module together with the control data related to the display color of the pixel and the control data of other pixels. A display control method for a display device. According to the length of the matching state duration of the color information of the pixel detected as a pixel in which the matching state of the color information continues over a preset time, the longer the matching state duration, 6. The display control method for a display device according to claim 5 , wherein the control data relating to the brightness of the control data corresponding to the pixel is corrected so that the brightness of the pixel is lowered. Count the number of pixels for which the color information match state continues for a preset time for each divided area that defines the frame, and if this number exceeds a preset threshold, 6. The display control method for a display device according to claim 5, wherein all pixels belonging to the area are detected as pixels in which the matching state of the color information continues for a preset time. A decoder that generates display color and luminance control data for one frame in units of pixels based on color information and luminance information in units of pixels sent from the host device in units of one frame, and a data transmission path A display module that receives the control data from the decoder and adjusts the display color and brightness of each pixel to sequentially display an image for one frame; and a color information storage area for storing color information in units of pixels for one frame And a microprocessor mounted on a display device including a memory having a coincidence number storage area for storing the coincidence number of color information in units of pixels in units of the number of frames received from the host device ,
Each time color information and luminance information for one frame are sent from the host device, the color information sent from the host device and the color information stored in the color information storage area of the memory at the same position on the frame. When coincidence / non-coincidence is determined in units of pixels, and the two match, the number of matches in the match count storage area corresponding to this pixel is incremented by one. The value of the storage area is initialized, the color information sent from the host device is updated and stored in the color information storage area corresponding to the pixel, and the number of matches for each pixel stored in the match count storage area on the basis of the transfer period of the frame data, obtains a time matching state continues color information for each pixel, a pixel that this time exceeds the time the preset, Comparison detection means exceeds the order set time is detected as a pixel matching state of the color information is continued and,
Among the control data from the decoder, the control data related to the brightness of the control data corresponding to the pixel detected by the comparison and detection means is lower than the brightness corresponding to the brightness information of the pixel sent from the host device. The display control program for a display device, wherein the display control program functions as luminance correction means that is transferred to the display module together with control data relating to the display color of the pixel and control data of other pixels.

Images