WO2022032890A1

WO2022032890A1 - Backlight compensation method and apparatus, display device, and readable storage medium

Info

Publication number: WO2022032890A1
Application number: PCT/CN2020/125551
Authority: WO
Inventors: 戴宇明
Original assignee: 深圳创维－Rgb电子有限公司
Priority date: 2020-08-12
Filing date: 2020-10-30
Publication date: 2022-02-17
Also published as: CN111883071A

Abstract

A backlight compensation method and apparatus (400), a display device, and a readable storage medium. The backlight compensation method comprises: recording an LED drive parameter within a preset time interval (S11); calculating a backlight enabling parameter by using the LED drive parameter and by means of a first preset algorithm (S12); after a preset time has passed, calculating a backlight compensation value by using the backlight enabling parameter and by means of a second preset algorithm (S13); and performing backlight compensation according to the backlight compensation value (S14). In the backlight compensation method, an LED drive parameter is recorded in real time and a backlight compensation value is calculated, thereby improving backlight compensation accuracy, and enabling the screen backlight of a display device to be maintain stable, and optical attenuation of the display device is compensated when a user is unaware, thereby improving user experience.

Description

Backlight compensation method, apparatus, display device and readable storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese Patent Application No. 2020108094568 and entitled "Backlight Compensation Method, Apparatus, Display Device and Readable Storage Medium" filed with the China Patent Office on August 12, 2020, the entire contents of which are by reference Incorporated in this application.

technical field

The present application relates to the field of display technology, and in particular, to a backlight compensation method, apparatus, display device and readable storage medium.

Background technique

When the display device is in use, the LED light-emitting panel (LED, Light Emitting Diode, light-emitting diode) of the display device will continuously attenuate its function over time, that is, light decay. At present, in order to solve the problem of light decay, a fixed light decay curve is generally provided by the LED manufacturer, and compensation is performed according to the light decay curve. However, in the face of different usage environments, using a fixed light decay curve to compensate, the compensation accuracy is relatively low, which affects the user's experience.

SUMMARY OF THE INVENTION

In view of the above problems, one of the objectives of the present application includes providing a backlight compensation method, apparatus, display device and readable storage medium, so as to improve the accuracy of backlight compensation and the user experience.

In order to achieve the above object, the application adopts the following technical solutions:

A backlight compensation method, comprising:

Record LED drive parameters at preset time intervals;

Using the LED driving parameters to calculate a backlight turn-on parameter through a first preset algorithm;

After the preset time has elapsed, the backlight compensation value is calculated through the second preset algorithm by using the backlight turn-on parameter;

Backlight compensation is performed according to the backlight compensation value.

In a possible implementation manner, in the backlight compensation method, the LED driving parameters include LED driving frequency, LED switching times and LED driving duty cycle, and the backlight turning-on parameters include total LED switching times and LED total switching times. Power-on time.

In a possible implementation manner, in the backlight compensation method, the first preset algorithm formula includes:

S _LED =S' _LED +s; T _LED =T' _LED +f _LED ×d _LED ;

In the formula, S _LED is the total on-off times of the LEDs, S′ _LED is the total on-off times of the LEDs before the current preset time interval, s is the on-off times of the LEDs in the current preset time interval; T _LED is the total power-on time of the LEDs , T′ _LED is the total power-on time of the LED before the current preset time interval, f _LED is the LED driving frequency in the current preset time interval, and d _LED is the LED drive duty cycle in the current preset time interval.

In a possible implementation manner, in the backlight compensation method, the calculating the backlight compensation value through the second preset algorithm using the backlight turn-on parameter includes:

When the total LED power-on time is less than or equal to the preset LED power-on time, the backlight compensation is calculated by using the LED total power-on time, the preset LED power-on time, and a preset compensation value through a first compensation algorithm value;

When the total LED power-on time is greater than the preset LED power-on time, the backlight compensation is calculated through a second compensation algorithm using the total LED switching times, the preset LED switching times, and the preset compensation value value.

In a possible implementation manner, in the backlight compensation method, the first compensation algorithm formula includes:

In the formula, A is the backlight compensation value, T _LED is the total power-on time of the LED, T is the preset LED power-on time, and A′ is the preset compensation value.

In a possible implementation manner, in the backlight compensation method, the second compensation algorithm formula includes:

In the formula, A is the backlight compensation value, S _LED is the total switching times of the LEDs, S is the preset LED switching times, and A′ is the preset compensation value.

In a possible implementation manner, after a preset time has elapsed, using the backlight turn-on parameter to calculate the backlight compensation value through a second preset algorithm includes:

When the value of the counter reaches the preset value, the backlight compensation value is calculated by using the backlight turn-on parameter through the second preset algorithm, wherein the counter accumulates the total number of LED switches and the LED power-on time every preset time interval. count.

In a possible implementation manner, in the backlight compensation method, before using the backlight turn-on parameter to calculate the backlight compensation value through the second preset algorithm, the method further includes:

In the case of receiving the backlight compensation parameters sent by the remote database, the backlight compensation is performed according to the backlight compensation parameters.

In a possible implementation, performing backlight compensation according to the backlight compensation parameters includes:

Using the backlight compensation parameters sent by the remote database to calculate the backlight compensation value through the second preset algorithm;

In a possible implementation manner, before using the backlight turn-on parameter to calculate the backlight compensation value through the second preset algorithm, the method further includes:

In the case where the backlight compensation parameter sent by the remote database is not received, the backlight compensation value is calculated through the second preset algorithm by using the backlight turn-on parameter.

The present application also provides a backlight compensation device, comprising:

The driving parameter recording module is configured to record the LED driving parameters of the preset time interval;

A startup parameter calculation module configured to use the LED driving parameters to calculate a backlight startup parameter through a first preset algorithm;

a compensation value calculation module, configured to calculate a backlight compensation value through a second preset algorithm using the backlight turn-on parameter after a preset time elapses;

The backlight compensation module is configured to perform backlight compensation according to the backlight compensation value.

In a possible implementation manner, the backlight compensation module is further configured to perform backlight compensation according to the backlight compensation parameters in the case of receiving the backlight compensation parameters sent by the remote database.

In a possible implementation manner, the backlight compensation module is further configured to calculate the backlight compensation value through the second preset algorithm by using the backlight turn-on parameter without receiving the backlight compensation parameter sent by the remote database .

The present application also provides a display device including a memory and a processor, wherein the memory stores a computer program, and the processor runs the computer program to make the display device execute the backlight compensation method.

The present application also provides a readable storage medium, which stores a computer program, and the computer program executes the backlight compensation method when running on a processor.

The application provides a backlight compensation method. The backlight compensation method includes: recording LED driving parameters at a preset time interval; using the LED driving parameters to calculate a backlight turn-on parameter through a first preset algorithm; after the preset time elapses, The backlight compensation value is calculated through the second preset algorithm by using the backlight turn-on parameter; and the backlight compensation is performed according to the backlight compensation value. The backlight compensation method of the present application improves the accuracy of the backlight compensation by recording the LED driving parameters in real time and calculating the backlight compensation value, and can keep the screen backlight of the display device stable. to compensate for the failure, so as to improve the user experience.

In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, optional embodiments are exemplified below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be It is regarded as a limitation on the protection scope of this application. In the various figures, similar components are numbered similarly.

1 is a flowchart of a backlight compensation method provided by an embodiment of the present application;

2 is a flowchart of calculating a backlight compensation value provided by an embodiment of the present application;

3 is a flowchart of a backlight compensation method provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a backlight compensation device provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of possible implementations of the present application, but not all of them.

The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

Hereinafter, the terms "comprising", "having" and their cognates, which may be used in various embodiments of the present application, are only intended to denote particular features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the presence of or adding one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing or the possibility of a combination of the foregoing.

Furthermore, the terms "first," "second," "third," etc. are only configured to differentiate descriptions, and should not be construed to indicate or imply relative importance.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this application belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized or overly formal meaning, unless explicitly defined in the various embodiments of the present application.

1 is a flowchart of a backlight compensation method provided by the present application, and the method includes the following steps:

Step S11: Record the LED driving parameters of the preset time interval.

In the embodiment of the present application, the function of the LED light-emitting panel (LED, Light Emitting Diode, light-emitting diode) of the display device will be continuously attenuated with the passage of time, and the main factors affecting the light decay of the LED light-emitting panel are the lighting time and switching frequency of the LED. , the longer the lighting time and the higher the switching frequency, the faster the light decay. Therefore, the LED driving parameters can be recorded in real time in the display device, and the light attenuation can be compensated according to the driving parameters.

In the embodiment of the present application, the LED driving parameters may be recorded according to a preset time interval, and the LED driving parameters include the LED driving frequency, the number of times of switching the LED, and the LED driving duty ratio within the current preset time interval. That is, the corresponding LED driving frequency, LED switching times and LED driving duty cycle can be recorded in each time period, so as to record the changes of LED driving parameters when the LED light-emitting panel of the display device is working, so as to improve the subsequent calculation of light decay or backlight compensation value. precision. Wherein, the above process of recording the LED driving parameters of the preset time interval can be realized by using an algorithm or an application program. For example, an application program can be set in the display device, and the application program records the LED driving parameters of the corresponding time period after the preset time period elapses. Parameters, which are not limited here.

Step S12 : using the LED driving parameters to calculate the backlight turn-on parameters through the first preset algorithm.

In the embodiment of the present application, the LED driving parameters include the LED driving frequency, the number of times of LED switching, and the LED driving duty cycle in the current preset time interval, and the backlight turning-on parameters include the total number of LED switching times and the total LED power-on time. After each preset time interval has elapsed and the LED driving frequency, LED switching times and LED driving duty cycle of the corresponding time period are obtained, the LED driving frequency and LED driving duty cycle can be used to calculate the power-on time of the LED in this time period, And it is accumulated into the total power-on time of the LED, and the number of LED switches during this time period is also accumulated into the total number of LED switches. Among them, because the LED driving frequency and the LED driving duty cycle will change according to the image that the display device needs to display, or are affected by the power frequency of the display device, the LED driving frequency and the LED driving duty cycle are not fixed values. Collecting the LED driving frequency and the LED driving duty ratio at preset time intervals can improve the accuracy of the LED power-on time calculation. The preset time interval can be set by the user, and the smaller the preset time interval is, the more it can reflect the change of the LED driving frequency and the LED driving duty cycle, thereby improving the accuracy of the calculation of the total LED power-on time.

In the embodiment of the present application, the first preset algorithm formula includes:

S _LED =S' _LED +s; T _LED =T' _LED +f _LED ×d _LED ;

In the formula, S _LED is the total on-off times of the LEDs, S′ _LED is the total on-off times of the LEDs before the current preset time interval, s is the on-off times of the LEDs in the current preset time interval; T _LED is the total power-on time of the LEDs , T′ _LED is the total power-on time of the LED before the current preset time interval, f _LED is the LED driving frequency in the current preset time interval, and d _LED is the LED drive duty cycle in the current preset time interval. Wherein, an application program based on the above-mentioned first preset algorithm may be set in the display device, and the total power-on time of the LED and the total number of times of switching of the LED are calculated through the application program.

Step S13 : after a preset time has elapsed, use the backlight turn-on parameter to calculate a backlight compensation value through a second preset algorithm.

In the embodiment of the present application, after the preset time has elapsed, the display device will use the accumulated backlight turn-on parameters, that is, the total LED power-on time and the total LED switching times, to calculate the backlight compensation value through the second preset algorithm. Wherein, a counter may also be set in the display device, the total number of LED switches and the LED power-on time are counted up every preset time interval, and the backlight compensation value is calculated after the value of the counter reaches the preset value.

In the embodiment of the present application, the above-mentioned process of calculating the backlight compensation value by using the second preset algorithm may be implemented by using an application program. For example, an application program based on the second preset algorithm may be set in the display device. After starting, the backlight compensation value is calculated by the second preset algorithm according to the obtained backlight turn-on parameters.

Step S14: Perform backlight compensation according to the backlight compensation value.

In the embodiment of the present application, by recording the LED driving parameters in real time and calculating the backlight compensation value, the accuracy of the backlight compensation can be improved, and the screen backlight of the display device can be kept stable. to compensate for the failure, so as to improve the user experience.

Fig. 2 is a kind of flow chart of calculating the backlight compensation value provided by the present application, and it comprises the following steps:

Step S21 : in the case that the total power-on time of the LED is less than or equal to the preset power-on time of the LED, use the total power-on time of the LED, the preset LED power-on time and the preset compensation value to calculate the total power-on time through the first compensation algorithm. the backlight compensation value.

In the embodiment of the present application, the first compensation algorithm formula includes:

In the formula, A is the backlight compensation value, T _LED is the total power-on time of the LED, T is the preset LED power-on time, and A′ is the preset compensation value. Wherein, an application program based on the above-mentioned first compensation algorithm formula may be set in the display device, and the display device starts the application program based on the first compensation algorithm formula when it is determined that the total LED power-on time is less than or equal to the preset LED power-on time, Thereby, the backlight compensation value is calculated.

Step S22: In the case that the total LED power-on time is greater than the preset LED power-on time, use the total LED switching times, the preset LED switching times, and the preset compensation value to calculate the the backlight compensation value.

In the formula, A is the backlight compensation value, S _LED is the total switching times of the LEDs, S is the preset LED switching times, and A′ is the preset compensation value. Wherein, an application program based on the above-mentioned second compensation algorithm formula may be set in the display device, and when the display device determines that the total LED power-on time is greater than the preset LED power-on time, the application program based on the second compensation algorithm formula is started to calculate The backlight compensation value is displayed.

3 is a flowchart of a backlight compensation method provided by the present application, and the method includes the following steps:

Step S31 : record the LED driving parameters of the preset time interval.

This step is the same as the above-mentioned step S11, and is not repeated here.

Step S32 : using the LED driving parameters to calculate the backlight turn-on parameters through the first preset algorithm.

This step is the same as the above-mentioned step S12, and is not repeated here.

Step S33: After a preset time has elapsed, receive the backlight compensation parameters sent by the remote database, and perform backlight compensation according to the backlight compensation parameters.

In the embodiment of the present application, before the backlight compensation value is calculated by using the backlight turn-on parameter and the second preset algorithm, the display device may also access a remote database through a network connection to obtain the latest backlight compensation parameters provided by the remote database. The remote database can generate a backlight compensation parameter suitable for the region according to the region where the display device is located. When the display device does not receive the backlight compensation parameter, the backlight compensation value is calculated by using the local backlight turn-on parameter and the preset algorithm.

Step S34: When the backlight compensation parameter is not received, use the backlight turn-on parameter to calculate a backlight compensation value through a second preset algorithm.

This step is the same as the above-mentioned step S13, and is not repeated here.

Step S35: Perform backlight compensation according to the backlight compensation value.

This step is the same as the above-mentioned step S14, and is not repeated here.

FIG. 4 is a schematic structural diagram of a backlight compensation device provided by the present application.

The backlight compensation device 400 includes:

The driving parameter recording module 410 is configured to record the LED driving parameters of the preset time interval;

Turning on parameter calculation module 420, configured to use the LED driving parameters to calculate the backlight turning-on parameter through a first preset algorithm;

The compensation value calculation module 430 is configured to calculate the backlight compensation value through the second preset algorithm by using the backlight turn-on parameter after a preset time elapses;

The backlight compensation module 440 is configured to perform backlight compensation according to the backlight compensation value.

The backlight compensation module is further configured to perform backlight compensation according to the backlight compensation parameters in the case of receiving the backlight compensation parameters sent by the remote database.

The backlight compensation module is further configured to calculate the backlight compensation value through the second preset algorithm by using the backlight turn-on parameter without receiving the backlight compensation parameter sent by the remote database.

In the embodiments of the present application, for more detailed functional descriptions of the above-mentioned modules and units, reference may be made to the contents of the corresponding parts in the foregoing embodiments, and details are not repeated here.

In addition, the present application also provides a display device, the display device includes a memory and a processor, the memory can be configured to store a computer program, and the processor runs the computer program, so that the display device executes the above method or the above-mentioned remote control frequency switching The function of each module in the device.

The memory may include a stored program area and a stored data area, wherein the stored program area may store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; using the created data (such as audio data, phone book, etc.) and so on. Additionally, the memory may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The present application also provides a readable storage medium configured to store the computer program used in the above-mentioned display device.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may also be implemented in other manners. The apparatus embodiments described above are only schematic. For example, the flowcharts and structural diagrams in the accompanying drawings show the possible implementation architectures and functions of the apparatuses, methods and computer program products according to various embodiments of the present application. and operation. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more functions configured to implement the specified logical function(s) executable instructions. It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart diagrams, can be implemented using dedicated hardware-based systems that perform the specified functions or actions. be implemented, or may be implemented in a combination of special purpose hardware and computer instructions.

In addition, each functional module or unit in each embodiment of the present application may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Industrial Applicability

The application provides a backlight compensation method. The backlight compensation method includes: recording LED driving parameters at a preset time interval; using the LED driving parameters to calculate a backlight turn-on parameter through a first preset algorithm; after a preset time has elapsed and calculating a backlight compensation value by using the backlight turn-on parameter through a second preset algorithm; and performing backlight compensation according to the backlight compensation value. The backlight compensation method of the present application improves the accuracy of the backlight compensation by recording the LED driving parameters in real time and calculating the backlight compensation value, and can keep the screen backlight of the display device stable. to compensate for the failure, so as to improve the user experience.

Claims

A backlight compensation method, comprising:

Record LED drive parameters at preset time intervals;

Using the LED driving parameters to calculate a backlight turn-on parameter through a first preset algorithm;

After the preset time has elapsed, the backlight compensation value is calculated through the second preset algorithm by using the backlight turn-on parameter;

Backlight compensation is performed according to the backlight compensation value.
The backlight compensation method according to claim 1, wherein the LED driving parameters include LED driving frequency, LED switching times, and LED driving duty cycle, and the backlight turning-on parameters include total LED switching times and total LED power-on time. .
The backlight compensation method according to claim 1 or 2, wherein the first preset algorithm formula comprises:

S LED =S' LED +s; T LED =T' LED +f LED ×d LED ;

In the formula, S LED is the total on-off times of the LEDs, S′ LED is the total on-off times of the LEDs before the current preset time interval, s is the on-off times of the LEDs in the current preset time interval; T LED is the total power-on time of the LEDs , T′ LED is the total power-on time of the LED before the current preset time interval, f LED is the LED driving frequency in the current preset time interval, and d LED is the LED drive duty cycle in the current preset time interval.
The backlight compensation method according to claim 2, wherein the calculating the backlight compensation value by using the backlight turn-on parameter through a second preset algorithm comprises:

When the total LED power-on time is less than or equal to the preset LED power-on time, the backlight compensation is calculated by using the LED total power-on time, the preset LED power-on time, and a preset compensation value through a first compensation algorithm value;

When the total LED power-on time is greater than the preset LED power-on time, the backlight compensation is calculated through a second compensation algorithm using the total LED switching times, the preset LED switching times, and the preset compensation value value.
The backlight compensation method according to claim 4, wherein the first compensation algorithm formula comprises:

In the formula, A is the backlight compensation value, T LED is the total power-on time of the LED, T is the preset LED power-on time, and A′ is the preset compensation value.
The backlight compensation method according to claim 4, wherein the second compensation algorithm formula comprises:

In the formula, A is the backlight compensation value, S LED is the total switching times of the LEDs, S is the preset LED switching times, and A′ is the preset compensation value.
The backlight compensation method according to any one of claims 1-6, characterized in that, after a preset time has elapsed, using the backlight turn-on parameter to calculate a backlight compensation value through a second preset algorithm comprises:

When the value of the counter reaches the preset value, the backlight compensation value is calculated by using the backlight turn-on parameter through the second preset algorithm, wherein the counter accumulates the total number of LED switches and the LED power-on time every preset time interval. count.
The backlight compensation method according to any one of claims 1-7, wherein, before using the backlight turn-on parameter to calculate a backlight compensation value through a second preset algorithm, the method further comprises:

In the case of receiving the backlight compensation parameters sent by the remote database, the backlight compensation is performed according to the backlight compensation parameters.
The backlight compensation method according to any one of claims 1-8, wherein the backlight compensation according to the backlight compensation parameter comprises:

Using the backlight compensation parameters sent by the remote database to calculate the backlight compensation value through the second preset algorithm;

Backlight compensation is performed according to the backlight compensation value.
The backlight compensation method according to any one of claims 1-9, characterized in that, before using the backlight turn-on parameter to calculate a backlight compensation value through a second preset algorithm, the method further comprises:

In the case that the backlight compensation parameter sent by the remote database is not received, the backlight compensation value is calculated through the second preset algorithm by using the backlight turn-on parameter.
A backlight compensation device, comprising:

The driving parameter recording module is configured to record the LED driving parameters of the preset time interval;

A startup parameter calculation module configured to use the LED driving parameters to calculate a backlight startup parameter through a first preset algorithm;

a compensation value calculation module, configured to calculate a backlight compensation value through a second preset algorithm using the backlight turn-on parameter after a preset time elapses;

The backlight compensation module is configured to perform backlight compensation according to the backlight compensation value.
The backlight compensation device according to claim 11, wherein the backlight compensation module is further configured to perform backlight compensation according to the backlight compensation parameters in the case of receiving the backlight compensation parameters sent by the remote database.
The backlight compensation device according to claim 11 or 12, wherein the backlight compensation module is further configured to use the backlight turn-on parameter to pass the second parameter without receiving the backlight compensation parameter sent by the remote database. The preset algorithm calculates the backlight compensation value.
A display device, characterized in that it includes a memory and a processor, the memory stores a computer program, and the processor runs the computer program to make the display device execute the method according to any one of claims 1 to 7. The backlight compensation method described above.
A readable storage medium, characterized in that it stores a computer program, and the computer program executes the backlight compensation method according to any one of claims 1-10 when the computer program runs on a processor.