JP6137588B2 - Display device, display control method, and program - Google Patents

Description

  The present invention relates to a display device, a display control method, and a program.

  Display devices such as liquid crystal displays are often used in arcade game machines and game machines. Up to now, with regard to the usage environment of gaming machines and the like, there are limited models that can be operated for a long time, and there have been many situations where they are replaced and discarded in a few months. However, in recent years, the possibility of using a liquid crystal display device over a long period of time has increased due to models that can be operated for a long period of time and corresponding to reuse. For this reason, it can be used if correction and adjustment can still be performed, but it cannot be used because the brightness of the liquid crystal display device decreases or the chromaticity shifts due to changes over time or environmental changes. May be judged. Therefore, techniques for adjusting the characteristics of liquid crystal display devices have become important.

  For example, in Patent Document 1, in order to make it possible to determine whether a part of a gaming machine can be reused, the presentation control CPU determines the degree of deterioration of the gaming machine based on the operating time and the temperature detected by the temperature sensor. A technique has been proposed in which a degradation index indicating (degradation degree) is obtained and recorded in a preset storage area of an RTC RAM.

JP 2011-066727 A

  However, in Patent Document 1 described above, even if the degree of deterioration can be known, characteristics due to changes over time and environmental changes such as a decrease in luminance and a change in chromaticity in the display device during use during the deterioration. Deterioration cannot be adjusted, and there is a problem that it can only be used as it is without adjustment.

  The present invention provides a display device, a display control method, and a program that can solve the above-described problems.

In order to solve the above-described problem, the present invention is a display device having a display unit and a control unit that controls the display unit, and a time measurement unit that measures a start time and a stop time of the display unit; The integration unit that integrates and stores the operation time of the display unit from the start time and the stop time measured by the time measurement unit, and the relationship between the operation time of the display unit and the luminance correction value are associated with each other. The brightness correction table to be stored and the brightness correction table are referred to, the brightness correction value corresponding to the operation time of the display unit integrated by the integration unit is acquired, and based on the brightness correction value, from the control unit wherein the brightness adjusting unit for correcting the luminance control signal to the display unit, at the start of the display portion, a temperature measuring unit for measuring the temperature at the time of stopping, the by the display unit of the operating time integrated by the integration unit and Measured by the temperature measuring unit Based on the temperature of the radical 113, the time correcting unit for correcting the measured time of the time measuring unit, a display device, characterized in that it comprises a.

In order to solve the above-described problem, the present invention provides a display control method for a display device including a display unit and a control unit that controls the display unit, wherein the time measurement unit starts the display unit. A step of measuring a stop time, a step of integrating and storing an operation time of the display unit from the start time and the stop time measured by the step, and an operation time and luminance correction of the display unit A step of storing the relationship with the value in advance in the luminance correction table, and the luminance adjustment unit refers to the luminance correction table, and the luminance correction value corresponding to the operating time of the display unit integrated by the integration unit Acquiring and correcting a luminance control signal from the control unit to the display unit based on the luminance correction value; and a step of measuring a temperature when the temperature measurement unit starts and stops the display unit; Time supplement Correcting the time measured by the time measuring unit based on the operating time of the display unit integrated by the integrating unit and the temperature of the display unit measured by the temperature measuring unit. Is a display control method characterized by the above.

In order to solve the above-described problem, the present invention provides a time measurement for measuring a start time and a stop time of the display unit in a computer of a display device having a display unit and a control unit for controlling the display unit. Function, an integration function that integrates and stores the operation time of the display unit from the start time and the stop time measured by the time measurement function, and links the relationship between the operation time of the display unit and the luminance correction value The brightness correction value storage function stored in advance in the brightness correction table, the brightness correction table is referred to, the brightness correction value corresponding to the operation time of the display unit integrated by the integration function is acquired, and the brightness correction value is based on the brightness correction value Te, brightness adjustment function for correcting the luminance control signal from the control unit to the display unit, at the start of the display unit, a temperature measurement function for measuring the temperature at the time of stop, which is integrated by the integration function of the display unit Earning Time based on the temperature of the display unit measured by the temperature measurement function is a program characterized by executing the time correction function for correcting the measured time of the time measuring function.

  According to the present invention, it is possible to always adjust to a predetermined display characteristic even when used for a long time.

It is a block diagram which shows the structure of the display apparatus 1 by embodiment of this invention. It is a conceptual diagram which shows the change of the luminance characteristic of the backlight of LCD14 by this 1st Embodiment, and its correction method. It is a conceptual diagram for demonstrating the brightness | luminance correction method by this 1st Embodiment. It is a block diagram which shows the structure of the display apparatus 1 by this 2nd Embodiment. It is a conceptual diagram for demonstrating the chromaticity correction method in the 2nd embodiment. FIG. 5 shows a CIExy chromaticity diagram. It is a block diagram which shows the structure of the display apparatus 1 by this 3rd Embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

A. First Embodiment First, a first embodiment of the present invention will be described.
FIG. 1 is a block diagram showing a configuration of a display device 1 according to an embodiment of the present invention. In FIG. 1, a CPU (Central Processing Unit) 10 controls the operation of each unit by executing a predetermined program. The memory / IO controller 11 controls a memory (not shown) and an IO (input / output) according to control by the CPU 10 (control unit). The graphic LSI 12 controls graphic display on an LCD (Liquid Crystal Display) 14 (display unit) in accordance with control by the CPU via the memory / IO controller 11. The color correction IC 13 (chromaticity correction unit) corrects the color of the video data output from the graphic LSI.
The memory / IO controller 11 may be built in the CPU, and the color correction IC 13 may be built in the graphic LSI.

  The LCD 14 is a color liquid crystal display. The reset IC 15 resets the CPU 10. An RTC (Real Time Clock) 16 (time measuring unit) has a built-in RAM (Random Access Memory), which measures the real time and, according to control from the CPU 10, the temperature of the device × operation Holds the accumulated time value. The temperature sensor (or hardware monitor IC) 17 (temperature measurement unit) detects the temperature of the device. The LED backlight controller 18 controls the drive current to the backlight of the LCD 14 according to the PWM signal from the CPU 10.

The luminance correction table 19 is a table in which a correction index and a luminance correction value are associated with each other for correcting the luminance of the backlight of the LCD 14. Specifically, the luminance correction value is acquired in advance based on the secular change of the luminance characteristics of the backlight of the LCD 14 based on the operating temperature based on the experiment in the manufacturer or the experiment in the usage environment.
The luminance correction table 19 may be built in a program storage device ROM, HD (hard disk), or the like.

  2A and 2B are conceptual diagrams showing changes in the luminance characteristics of the backlight of the LCD 14 according to the first embodiment and a correction method thereof. As shown in FIG. 2A, the luminance characteristics of the backlight of the LCD 14 tend to decrease with time. In particular, it is known that the lower the operating temperature, the faster the rate of decrease (deterioration). Therefore, in the present invention, as shown in FIG. 2B, the backlight luminance of the LCD 14 is corrected by increasing the drive current to the backlight as time passes.

  Therefore, correction indices (for example, integrated values of temperatures at the start time, end time (stop time), and operation time) obtained from the operating time and operating temperature of the LCD 14 and the luminance correction of the PWM signal to the backlight of the LCD 14 are obtained. A luminance correction table 19 associated with the value (Duty ratio) is prepared.

FIG. 3 is a conceptual diagram for explaining the luminance correction method according to the first embodiment.
Each time the CPU 10 is activated, the CPU 10 obtains the activation time from the RTC 16 and the temperature at the activation from the temperature sensor 17 and stores them in the built-in RAM of the RTC 16. Further, when the power is turned off, the CPU 10 acquires the end time from the RTC 16 and the end temperature from the temperature sensor 17 and stores them in the built-in RAM of the RTC 16. In addition, the CPU 10 acquires each time and temperature during operation of the display device 1 from the RTC 16 and the temperature sensor 17 and stores them in the built-in RAM of the RTC 16. And CPU10 calculates the integral value of the temperature in each time, and calculates a correction parameter | index. The CPU 10 calculates an integrated value of the operating time (hereinafter referred to as an integrated operating time value) from the starting time and the ending time and holds it in the built-in RAM of the RTC 16 (integrating unit). The correction index may be calculated by multiplying the operating time integrated value by the temperature coefficient using a temperature coefficient based on the temperature difference between the hour temperature and the end temperature.

  Then, the CPU 10 refers to the luminance correction table 19 according to the correction index, acquires the luminance correction value, and sets it in a register inside the CPU 10 as shown in FIG. Thereby, the PWM circuit 10-1 provided in the CPU 10 controls the duty ratio of the PWM (pulse width modulation) signal (luminance control signal) to the LED backlight controller 18 according to the luminance correction value set in the register. To do. More specifically, the backlight luminance of the LCD 14 is increased by increasing the average backlight current by extending the ON time of the PWM signal (luminance adjustment unit).

  According to the first embodiment described above, even if it is used for a long time, it can be adjusted within the specification range of the backlight of the LCD, and can be used with the same luminance characteristic as when it was first used.

B. Second Embodiment Next, a second embodiment of the present invention will be described.
The second embodiment is further characterized by correcting the chromaticity characteristics of the LCD 14 that change over time according to the operating time and the operating temperature. Therefore, in the second embodiment, the correction index (for example, the integrated value of the temperature at each of the start time, the end time, and the operation time) obtained from the operating time and the operating temperature of the LCD 14 and the chromaticity of the chromaticity characteristic of the LCD 14. A chromaticity correction table 20 associated with correction values is prepared.

FIG. 4 is a block diagram showing the configuration of the display device 1 according to the second embodiment. It should be noted that portions corresponding to those in FIG. The chromaticity correction table 20 is a chromaticity correction of the chromaticity characteristic of the LCD 14 associated with a correction index (for example, an integrated value of temperature at each of the start time, end time, and operation time) obtained from the operation time and the operating temperature of the LCD 14. Holds the value.
The chromaticity correction table 20 may be built in a program storage device ROM or HD.

  FIG. 5 is a conceptual diagram for explaining a chromaticity correction method according to the second embodiment. FIG. 5 shows a CIExy chromaticity diagram. Actually, the three primary colors are arranged with gradation. In the second embodiment, the chromaticity characteristics of the LCD 14 are corrected by shifting the chromaticity as indicated by the arrows shown in FIG.

  Each time the CPU 10 is activated, the CPU 10 obtains the activation time from the RTC 16 and the temperature at the activation from the temperature sensor 17 and stores them in the built-in RAM of the RTC 16. Further, when the power is turned off, the CPU 10 acquires the end time from the RTC 16 and the end temperature from the temperature sensor 17 and stores them in the built-in RAM of the RTC 16. In addition, the CPU 10 acquires each time and temperature during operation of the display device 1 from the RTC 16 and the temperature sensor 17 and stores them in the built-in RAM of the RTC 16. Then, the CPU 10 calculates the correction index by calculating the integral value of the temperature at each time. The CPU 10 calculates an integrated value of the operating time (hereinafter referred to as an integrated operating time value) from the starting time and the ending time and holds it in the built-in RAM of the RTC 16 (integrating unit). The correction index may be calculated by multiplying the operating time integrated value by the temperature coefficient using a temperature coefficient based on the temperature difference between the hour temperature and the end temperature.

  Then, the CPU 10 obtains a brightness correction value by referring to the brightness correction table 19 according to the correction index, and controls the duty ratio of the PWM signal to the LED backlight controller 16 according to the brightness correction value, whereby the LCD 14 The backlight luminance is corrected (increased) (luminance adjustment unit). Further, the CPU 10 corrects the chromaticity of the LCD 14 by acquiring a chromaticity correction value by referring to the chromaticity correction table 20 according to the correction index, and controlling a parameter for the color correction IC 13 according to the chromaticity correction value. (Chromaticity adjustment unit).

  According to the second embodiment described above, even if it is used for a long time, it can be adjusted within the specification range of the color correction IC, and can be used with the same luminance characteristics and chromaticity characteristics as when it was first used. .

C. Third Embodiment Next, a third embodiment of the present invention will be described.
In the third embodiment, when the LCD 14 itself includes a color adjustment circuit (corresponding to a color correction IC), the parameters of the color adjustment circuit included in the LCD 14 are corrected.

  FIG. 6 is a block diagram showing the configuration of the display device 1 according to the third embodiment. In addition, the same code | symbol is attached to the part corresponding to FIG. 1, FIG. 4, and description is abbreviate | omitted. In FIG. 6, the LCD 14 itself includes a color adjustment circuit 14-1 and a clock unit 14-2. The color adjustment circuit 14-1 corresponds to the color correction IC 13 and adjusts the emission color of the LCD 14 in accordance with control by the CPU 10. The clock unit 14-2 corresponds to the RTC 16 and measures the real time, and stores the accumulated operation time of the LCD 14 itself, the start-up temperature, the end-time temperature, and the like in a built-in RAM (nonvolatile memory).

  Each time the CPU 10 is activated, the CPU 10 obtains the activation time from the clock unit 14-2 and the temperature at the time of activation from the temperature sensor 17, and stores them in the built-in RAM of the clock unit 14-2. In addition, when the power is turned off, the CPU 10 acquires the end time from the clock unit 14-2 and the temperature at the end from the temperature sensor 17, and stores them in the built-in RAM of the clock unit 14-2. In addition, the CPU 10 acquires each time and temperature during operation of the display device 1 from the RTC 16 and the temperature sensor 17 and stores them in the built-in RAM of the RTC 16. Then, the CPU 10 calculates the correction index by calculating the integral value of the temperature at each time. The CPU 10 calculates an integrated value of the operating time (hereinafter referred to as an operating time integrated value) from the start time and the end time, holds the calculated value in the built-in RAM of the clock unit 14-2 (integration unit), and determines the start time temperature and the end time. The correction index may be calculated by multiplying the operating time integrated value by the temperature coefficient using a temperature coefficient based on the hour temperature, the temperature difference between the startup temperature and the end temperature, or the like.

  Then, the CPU 10 acquires a chromaticity correction value by referring to the chromaticity correction table 20 according to the correction index, and controls a parameter for the chromaticity adjustment circuit 14-1 according to the chromaticity correction value, whereby the LCD 14. Correct the chromaticity (chromaticity adjustment unit). As in the first and second embodiments, the luminance correction value may be acquired with reference to the luminance correction table 19 to correct the luminance of the backlight of the LCD 14 (luminance adjustment unit).

  According to the third embodiment described above, according to the correction index calculated by multiplying the operating time integrated value by the temperature coefficient, the chromaticity correction value is obtained by referring to the chromaticity correction table 20, and according to the chromaticity correction value. Since the chromaticity of the LCD 14 is corrected by controlling the parameters for the color adjustment circuit 14-1 provided in the LCD 14, it is more effective when the LCD 14 itself is reused for reuse.

  In the first to third embodiments described above, the brightness and chromaticity of the LCD 14 are corrected. However, the present invention is not limited to this, and the time measured by the RTC 16 (or the clock unit 14-2) is corrected. Also good. In the display device 1, the RTC 16 (or the clock unit 14-2) is used as means for measuring the real time. The RTC 16 (or the clock unit 14-2) uses a crystal oscillator to measure the time, but the measured time has an error depending on the operating temperature and the operating time. For this reason, when the error in the timekeeping time increases, the error in the operation time and the operation time integrated value calculated based on the operation time also increases, and an accurate correction index cannot be calculated.

  Therefore, based on the experiment in the manufacturer or the experiment in the use environment, it is associated with the correction index (for example, the integrated value of the temperature at the start time, the end time, and the operation time) obtained from the operation time and the use temperature of the LCD 14. A time correction table (not shown) that holds the time correction value of the time measured by the RTC 16 (or the clock unit 14-2) is prepared.

  The CPU 10 (time correction unit) calculates an integrated value of the temperature at each time to calculate a correction index, acquires a time correction value by referring to the time correction table according to the correction index, and RTC 16 (or the clock unit 14). -2) is corrected according to the time correction value. Alternatively, the CPU 10 calculates an integrated value of the operating time (hereinafter referred to as an integrated operating time value) from the starting time and the ending time, and also calculates the starting temperature, the ending temperature, the temperature difference between the starting temperature and the ending temperature, and the like. A correction index is calculated by multiplying the operating time integrated value by the temperature coefficient using the temperature coefficient based on the temperature coefficient, the time correction value is obtained by referring to the time correction table according to the correction index, and the RTC 16 (or the clock unit 14- 2) may be corrected according to the time correction value. In this case, since the operation time of the LCD 14 can be measured with higher accuracy, the luminance and chromaticity of the LCD 14 can be corrected with higher accuracy.

  In the first to third embodiments described above, the temperature is measured by the temperature sensor at startup and when the power is turned off. However, the temperature is not limited to this, and the temperature is measured at predetermined time intervals in the power-on state, thereby correcting the index. It may be reflected in the calculation of.

  In the first to third embodiments described above, the (backlight) luminance of the LCD 14 and the chromaticity of the LCD 14 are corrected based on the operating time and the operating temperature. Prepare a correction table using parameters that have been evaluated in advance for the color change due to the environment (the cigarette dust (dirt) in the hall, etc., or the degree of deterioration due to the illuminance of the hall), and the correction index calculated by referring to the correction table Corresponding correction values may be acquired to correct the brightness of the LCD 14, the chromaticity of the LCD 14, and the time measured by the RTC 16 (clock unit 14-2).

  In the first to fourth embodiments described above, the game machine has been described as an example. However, the present invention is not limited to this, and the present invention can be applied to any electronic device in which luminance adjustment cannot be arbitrarily set.

1 Display device 10 CPU
11 Memory / IO Controller 12 Graphic LSI
13 color correction IC
14 LCD
14-1 Chromaticity Adjustment Circuit 14-2 Clock Unit 15 Reset IC
16 RTC (built-in RAM)
17 Temperature sensor 18 LED backlight controller 19 Luminance correction table 20 Chromaticity correction table 11 Terminal 12 Terminal 13 Terminal 21 Presence server 22 Presence server

Claims (9)

A display device having a display unit and a control unit for controlling the display unit,
A time measuring unit for measuring a start time and a stop time of the display unit;
An accumulating unit that accumulates and stores the operating time of the display unit from the start time and the stop time measured by the time measuring unit ;
A luminance correction table for storing the relationship between the operation time of the display unit and the luminance correction value in association with each other;
By referring to the brightness correction table, a brightness correction value corresponding to the operating time of the display unit integrated by the integration unit is acquired, and brightness control from the control unit to the display unit is performed based on the brightness correction value A brightness adjustment unit for correcting the signal ;
A temperature measuring unit for measuring the temperature at the time of starting and stopping of the display unit;
A time correction unit that corrects the time measured by the time measurement unit based on the operation time of the display unit integrated by the integration unit and the temperature of the display unit measured by the temperature measurement unit;
A display device comprising: The brightness adjusting unit is
The display device according to claim 1, wherein the luminance of the display unit is corrected by adjusting a duty ratio of a luminance control signal subjected to pulse width modulation from the control unit to the display unit. The brightness adjusting unit is
Based on the operation time of the display unit integrated by the integration unit and the temperature of the display unit measured by the temperature measurement unit, a luminance correction value is obtained from the luminance correction table, and based on the luminance correction value The display device according to claim 1, wherein a luminance control signal from the control unit to the display unit is corrected. A chromaticity correction unit for correcting the chromaticity of the display unit;
A chromaticity correction table for storing the relationship between the operation time of the display unit and the chromaticity correction value in association with each other;
Referring to the chromaticity correction table, the chromaticity correction value corresponding to the operation time of the display unit integrated by the integration unit is acquired, and a parameter to the chromaticity correction unit is obtained based on the chromaticity correction value. A chromaticity adjustment unit for correcting
The display device according to claim 1, further comprising: A chromaticity correction unit for correcting the chromaticity of the display unit;
A chromaticity correction table for storing the relationship between the operation time of the display unit and the chromaticity correction value in association with each other;
Referring to the chromaticity correction table, the chromaticity correction value corresponding to the operation time of the display unit integrated by the integration unit is acquired, and a parameter to the chromaticity correction unit is obtained based on the chromaticity correction value. A chromaticity adjustment unit for correcting
Further comprising
The chromaticity adjustment unit
Based on the operation time of the display unit integrated by the integration unit and the temperature of the display unit measured by the temperature measurement unit, a chromaticity correction value is acquired from the chromaticity correction table, and the chromaticity correction is performed. The display device according to claim 3, wherein a parameter to the chromaticity correction unit is corrected based on the value. As a secular change in the use environment, further comprising a correction table for storing the operation time of the display unit and a dirt correction value according to the degree of dirt on the screen of the display unit in association with each other,
The brightness adjusting unit is
Referring to the correction table, obtains a dirt correction value corresponding to the operating time of the display unit accumulated by the accumulation unit, and based on the dirt correction value, a luminance control signal from the control unit to the display unit The display device according to claim 1, wherein the display device is corrected. As a secular change in the use environment, further comprising a correction table for storing the operation time of the display unit and a dirt correction value according to the degree of dirt on the screen of the display unit in association with each other,
The chromaticity adjustment unit
Referencing the correction table, obtaining a stain correction value corresponding to the operating time of the display unit accumulated by the accumulation unit, and correcting a parameter to the chromaticity correction unit based on the stain correction value. The display device according to claim 4. A display control method for a display device having a display unit and a control unit for controlling the display unit,
A time measuring unit measuring a start time and a stop time of the display unit;
A step of integrating and storing the operation time of the display unit from the start time and the stop time measured by the step;
Preliminarily storing the relationship between the operation time of the display unit and the luminance correction value in the luminance correction table;
The luminance adjustment unit refers to the luminance correction table, acquires a luminance correction value corresponding to the operating time of the display unit integrated by the integration unit, and based on the luminance correction value, from the control unit to the display unit and correcting the luminance control signal to the,
A step in which the temperature measuring unit measures the temperature at the time of starting and stopping the display unit;
Correcting the time measured by the time measuring unit based on the operating time of the display unit integrated by the integrating unit and the temperature of the display unit measured by the temperature measuring unit;
A display control method comprising: In a computer of a display device having a display unit and a control unit for controlling the display unit,
A time measurement function for measuring the start time and stop time of the display unit,
An integration function for integrating and storing the operation time of the display unit from the start time and the stop time measured by the time measurement function;
A luminance correction value storage function that associates the relationship between the operation time of the display unit and the luminance correction value and stores the relationship in advance in a luminance correction table;
By referring to the brightness correction table, a brightness correction value corresponding to the operating time of the display unit integrated by the integration function is acquired, and brightness control from the control unit to the display unit is performed based on the brightness correction value Brightness adjustment function to correct the signal ,
A temperature measuring function for measuring the temperature at the time of starting and stopping the display unit;
A time correction function for correcting the time measured by the time measurement function based on the operation time of the display unit integrated by the integration function and the temperature of the display unit measured by the temperature measurement function;
A program characterized by having executed.

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