WO2022166449A1

WO2022166449A1 - Display brightness control method and apparatus, and terminal and computer-readable storage medium

Info

Publication number: WO2022166449A1
Application number: PCT/CN2021/140191
Authority: WO
Inventors: 何鹏
Original assignee: 深圳Tcl数字技术有限公司
Priority date: 2021-02-04
Filing date: 2021-12-21
Publication date: 2022-08-11
Also published as: CN114860183A

Abstract

A display brightness control method and apparatus, and a terminal and a computer-readable storage medium. The method comprises: receiving a brightness adjustment instruction, wherein the brightness adjustment instruction comprises a set value of a brightness menu of a display (S100); and adjusting backlight brightness of the display to corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display have a power function relationship therebetween (S200).

Description

Display brightness control method, device, terminal and computer-readable storage medium

This application claims the priority of the Chinese patent application filed on February 4, 2021 with the application number 202110155557.2 and the invention title "Display brightness control method, device, terminal and computer-readable storage medium", the entire contents of which are Incorporated herein by reference.

technical field

The present application relates to the field of imaging technologies, and in particular, to a display brightness control method, device, terminal, and computer-readable storage medium.

Background technique

The concept of gamma is often used in the field of display. Gamma is a quantity that describes the mapping relationship between physical quantities of natural reality and subjective visual grayscales. That is to say, gamma reflects what an imaging object makes to incident light. "Reaction", the gamma curve is a curve obtained according to different response values under different brightness. As an imaging object, the gamma curve of the human eye is not a straight line, that is to say, the human eye's response to light is non-linear, while All monitors provide a brightness adjustment function. When the user adjusts the brightness of the display through the menu of the display, if the brightness of the display changes linearly with the set value of the menu, the response of the human eye to light is non-linear, which will lead to the brightness of the display. In the eyes of the user, it is non-linear and the user experience is not good.

Therefore, the existing technology still needs to be improved and improved.

technical problem

The present application provides a display brightness control method, device, terminal and computer-readable storage medium, aiming to solve the problem in the prior art that when the display brightness is adjusted, non-linear brightness changes will be generated in the user's eyes, resulting in poor user experience. .

technical solutions

In a first aspect, a method for controlling brightness of a display is provided, including:

receiving a brightness adjustment instruction, wherein the brightness adjustment instruction includes a setting value of a brightness menu of the display; and

The backlight brightness of the display is adjusted to the corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display have a power function relationship.

In a second aspect, a device for controlling the brightness of a display is provided, including:

an instruction receiving module for receiving a brightness adjustment instruction, wherein the brightness adjustment instruction includes a setting value of a brightness menu of the display; and

A brightness adjustment module, configured to adjust the backlight brightness of the display to a corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display are a power functional relationship, the power of the power function is the reciprocal of the preset human eye gamma value.

In a third aspect, a terminal is provided, comprising: a processor and a storage medium communicatively connected to the processor, the storage medium is adapted to store a plurality of signals, and the processor is adapted to call the signals in the storage medium to execute:

In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to realize:

beneficial effect

Compared with the prior art, the present application provides a display brightness control method, device, terminal and computer-readable storage medium. In the display brightness control method provided by the present application, after obtaining the setting value of the brightness menu of the display , when the backlight brightness of the display is adjusted according to the set value, the relationship between the set value of the brightness menu and the backlight brightness is not a linear relationship, but a power function relationship, and the power of the power function is the reciprocal of the gamma value of the human eye, so that the display's The brightness of the backlight changes linearly with the setting value of the brightness menu to the human eye, which improves the user experience.

Description of drawings

1 is a flowchart of an embodiment of a display brightness control method provided by the present application;

2 is a schematic diagram of a display backlight brightness adjustment curve and a human eye sensitivity curve in an embodiment of a display brightness control method provided by the application;

3 is a schematic structural diagram of an embodiment of a display brightness control device provided by the application;

FIG. 4 is a schematic structural diagram of an embodiment of a terminal provided by this application.

Embodiments of the present application

The present application provides a display brightness control method, device, terminal and computer-readable storage medium. In order to make the purpose, technical solutions and effects of the present application clearer and clearer, the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

Example 1

The display brightness control method provided in this embodiment of the present application may be executed by a terminal. The terminal is provided with a display or is connected to the display in communication. The terminal may control the backlight brightness of the display through the display brightness control method provided in this embodiment. The terminal may be But not limited to televisions, computers, mobile phones, portable wearable devices, etc.

As shown in FIG. 1, the display brightness control method provided by this embodiment includes the steps:

S100. Receive a brightness adjustment instruction, wherein the brightness adjustment instruction includes a setting value of a brightness menu of the display.

Specifically, a brightness menu can be set on the terminal, and the user can adjust the backlight brightness of the display accordingly by setting the set value of the brightness menu. For example, when the user thinks that the brightness of the current display is too low, the set value of the brightness menu can be increased. Thereby increasing the backlight brightness of the display. For the human eye, its response to light is non-linear. In the prior art, there is a linear relationship between the backlight brightness of the display and the setting value of the brightness menu, that is, when the change amount of the setting value of the brightness menu When it is the same, the change of the physical value of the backlight brightness of the display is also the same, as shown in the curve 3 in Figure 2, the relationship between the setting value of the brightness menu and the backlight brightness of the display is a straight line, set the brightness adjustment menu of the display. The change range of the set value in the brightness adjustment menu is [BL _min , BL _max ], and the corresponding backlight brightness change range is [L _min , L _max ], that is, the minimum set value BL _min and the maximum set value in the brightness adjustment menu The backlight brightness corresponding to BL _max is L _min and L _max respectively, then the curve 3 in Figure 2 passes through points (BL _min , L _min ) and (BL _max , L _max ), when the setting value of the brightness adjustment menu is BL When , the corresponding display backlight brightness is L ₁ , it can be seen that the expression of curve 3 is:

L ₁ -L _min =(BL-BL _min )*(L _max -L _min )/(BL _max -BL _min )

Simplified to:

The intersection point of curve 3 and the horizontal axis (the setting value of the brightness menu) is (BL ₀ ,0), and the response degree of the human eye to the light is expressed as a numerical value (human eye sensitivity). For the convenience of calculation, the backlight brightness of the display is set to be the lowest When , the sensitivity of the human eye is 0, and the corresponding sensitivity of the human eye when the backlight brightness of the display is the highest is E _max . The gamma curve is a curve obtained according to different response values under different brightness. As an imaging object, the gamma curve of the human eye is not a straight line, but a power function curve, that is to say, the human eye's response to light is non-linear. The human eye gamma curve can be obtained according to the human eye response values under different brightness. The power of the human eye gamma curve is the human eye gamma value. When adjusting the backlight brightness of the display according to curve 3, the human eye gamma curve The curve is a power function curve whose power is the gamma value of the human eye. Suppose the gamma value of the human eye is gamma. For curve 3, the relationship between the setting value of the brightness adjustment menu and the sensitivity of the human eye is a power function curve. Curve 1 in Figure 2, which passes through points (BL ₀ , 0) and (BL _max , E _max ), when the setting value of the brightness adjustment menu is BL, the corresponding human eye sensitivity is E ₁ , then the brightness adjustment The expression of the relationship curve between the setting value of the menu and the sensitivity of the human eye is:

According to the expression of L ₁ , it can be known that BL ₀ =BL _min +L _min *(BL _max -BL _min ) _/ (L _max -L _min ), then the expression of curve 1 can be rewritten as:

It is not difficult to see from Fig. 2 that, with the different setting values, the setting value of the brightness adjustment menu produces the same change ΔBL corresponding to different changes ΔE of human eye sensitivity. In this way, for the user, when When adjusting the setting value in the brightness menu from 4 to 5 and from 5 to 6, although the physical value change of the backlight brightness of the display is the same, the degree of change in the brightness of the display backlight that the user feels is different, which will cause the user to Bad experience.

Therefore, in this embodiment, the relationship between the setting value of the brightness setting menu and the actual physical value of the brightness of the backlight of the display is a power function relationship rather than a linear relationship, so that the brightness of the backlight of the display changes with the setting value of the brightness menu. The change is linear to the human eye, which is more in line with the photosensitive characteristics of the human eye and improves the user experience.

S200. Adjust the backlight brightness of the display to a corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display have a power function relationship.

Since the gamma curve of the human eye is a power function curve, when the set value of the brightness menu and the backlight brightness of the display are in a power function relationship corresponding to the gamma curve of the human eye, the When adjusting the brightness, the brightness of the backlight of the display changes linearly with the setting value of the brightness menu to the human eye. The power of the power function relationship is the reciprocal of the preset human eye gamma value.

Specifically, in this embodiment, the relationship between the setting value of the brightness menu and the brightness of the backlight of the display can be expressed as:

Wherein, L is the backlight brightness of the display, BL is the set value of the brightness menu, BL _max is the maximum value of the adjustment range of the brightness menu, and L _max is the maximum value of the adjustment range of the brightness menu. The backlight brightness, gamma is the preset human eye gamma value.

As shown in FIG. 2 , the relationship between the setting value of the brightness menu and the backlight brightness of the display in the display brightness control method provided by this embodiment is shown in curve 4. In the display brightness control method provided by this embodiment, when When the setting value of the brightness menu is BL, the corresponding human eye sensitivity is E ₂ , then the relationship between the brightness menu and the human eye sensitivity is:

After substituting the formula for L, we get:

The corresponding curve can be shown as curve 2 in Figure 2. It is not difficult to see that when the relationship between the setting value of the brightness menu and the backlight brightness of the display is a power function relationship whose power is the reciprocal of the gamma value of the human eye, the brightness menu There is a linear relationship between the setting value of , and the sensitivity of the human eye, that is, when the setting value of the brightness adjustment menu produces the same variation ΔBL, the corresponding variation ΔE of the sensitivity of the human eye is always the same. That is to say, the sensitivity of the human eye changes uniformly with the setting value of the brightness menu. When the setting value in the brightness menu is adjusted from 4 to 5 and from 5 to 6, although the physical value of the backlight brightness of the display changes is different However, the degree of change in the brightness of the display backlight experienced by the user is the same, and the user experience is better.

Specifically, there are differences in the gamma values of different human eyes, and the preset human eye gamma value ranges from 1.8 to 2.5, for example, 1.8, 2.2, 2.5, etc., and the preset human eye gamma value It can be predetermined by experimentation.

As mentioned above, the formula parameters of the correspondence between the setting value of the brightness menu and the brightness of the backlight include the maximum value of the setting value of the brightness menu and the brightness of the backlight corresponding to the maximum value of the setting value of the brightness menu, that is, the Before adjusting the backlight brightness of the display to the corresponding backlight brightness by the set value of the brightness menu, the display brightness control method provided by this embodiment further includes the steps:

Obtain the maximum value of the set value of the brightness menu and the backlight brightness corresponding to the maximum value;

The corresponding relationship between the setting value of the brightness menu and the backlight brightness is determined according to the maximum value and the backlight brightness corresponding to the maximum value.

Specifically, the backlight brightness adjustment of the display is realized by modifying the register value in the backlight brightness control chip, that is to say, there is a mapping relationship between the register value and the backlight brightness. Adjust the backlight brightness of the display to the corresponding backlight brightness, including:

S210, obtaining the target register value corresponding to the setting value of the brightness menu;

S220. Adjust the register value of the backlight brightness control chip of the display to the target register value.

In a possible implementation manner, in order to make the brightness adjustment response of the display faster, the register values corresponding to each setting value in the brightness adjustment menu may be preset. Specifically, the acquiring the setting Before the target register value corresponding to the value, the method further includes:

Determine the backlight brightness corresponding to each setting value in the brightness menu according to the power function relationship;

Determine the corresponding respective register values according to the backlight brightness corresponding to the respective set values;

A mapping relationship between the respective set values and the respective register values is established.

Generally speaking, corresponding values are often set in the brightness menu provided for users to adjust the brightness, for example, from 0 to 100, which can be pre-set according to each set value in the brightness menu and the difference between the set value and the backlight brightness. The power function relationship determines the backlight brightness corresponding to each set value, and different backlight brightness can be realized by adjusting the register value in the display brightness control chip. The mapping relationship between each setting value in the brightness menu and each register value, when the user adjusts the brightness through the brightness menu, the corresponding register value can be determined according to the setting value in the brightness menu selected by the user, thereby realizing Adjust the backlight brightness of the display to the backlight brightness corresponding to the set value.

To sum up, this embodiment provides a display brightness control method. After obtaining the setting value of the brightness menu of the display, when the backlight brightness of the display is adjusted according to the setting value, the difference between the setting value of the brightness menu and the backlight brightness is It is not a linear relationship, but a power function relationship, and the power of the power function is the reciprocal of the gamma value of the human eye, so that the backlight brightness of the display changes linearly with the setting value of the brightness menu to the human eye, improving the user experience.

It should be understood that although the various steps in the flowcharts given in the accompanying drawings of the present application are shown in sequence according to the arrows, these steps are not necessarily executed in the sequence indicated by the arrows. Unless explicitly stated herein, the steps in the present application are not strictly limited to the order in which they are performed, and the steps may be performed in other orders. Moreover, at least a part of the steps of the present application may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but may be executed at different times. The execution of these sub-steps or stages The sequence is also not necessarily sequential, but may be performed alternately or alternately with other steps or sub-steps of other steps or at least a portion of a phase.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above-mentioned embodiments can be implemented by using a computer program to perform signal-related hardware, and the computer program can be stored in a non-volatile computer-readable storage In the medium, when the computer program is executed, it may include the processes of the above-mentioned method embodiments. Wherein, any reference to memory, storage, database or other medium used in the various embodiments provided in this application may include non-volatile and/or volatile memory. Nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous chain Road (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

Embodiment 2

Based on the above embodiments, the embodiments of the present application further provide a display brightness control device. As shown in FIG. 3 , the display brightness control device includes:

an instruction receiving module, configured to receive a brightness adjustment instruction, wherein the brightness adjustment instruction includes the setting value of the brightness menu of the display, specifically as described in the first embodiment;

A brightness adjustment module, configured to adjust the backlight brightness of the display to a corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display are a power functional relationship, the power of the power function is the reciprocal of the preset human eye gamma value, specifically as described in the first embodiment.

Embodiment 3

An embodiment of the present application further provides a terminal, and its principle block diagram may be as shown in FIG. 4 . The apparatus includes a processor 10 and a memory 20, and a computer program is stored in the memory 20. When the processor 10 executes the computer program, at least the following steps can be implemented:

receiving a brightness adjustment instruction, wherein the brightness adjustment instruction includes the setting value of the brightness menu of the display;

The adjusting the backlight brightness of the display to the corresponding backlight brightness according to the set value of the brightness menu includes:

Obtain the target register value corresponding to the set value of the brightness menu;

The register value of the backlight brightness control chip of the display is adjusted to the target register value.

Wherein, before acquiring the target register value corresponding to the set value, the method further includes:

Wherein, the power of the power function is the reciprocal of the preset human eye gamma value.

Wherein, the corresponding relationship between the setting value of the brightness menu and the backlight brightness of the display is expressed as:

Wherein, L is the backlight brightness of the display, BL is the set value of the brightness menu, BL _max is the maximum value of the set value of the brightness menu, and L _max is the backlight corresponding to the maximum value of the brightness menu Brightness, gamma is the preset human eye gamma value.

Wherein, before adjusting the backlight brightness of the display to the corresponding backlight brightness according to the set value of the brightness menu, the method further includes:

Wherein, the preset human eye gamma value ranges from 1.8 to 2.5.

Embodiment 4

Embodiments of the present application further provide a computer-readable storage medium, on which one or more programs are stored, and the one or more programs can be executed by one or more processors to implement the display described in the foregoing embodiments The steps of the brightness control method.

For the specific implementation of the above operations, reference may be made to the foregoing embodiments, and details are not described herein again.

It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions and inventive concepts of the present application, and all these changes or replacements should belong to the protection scope of the appended claims of the present application.

Claims

A display brightness control method, comprising:

receiving a brightness adjustment instruction, wherein the brightness adjustment instruction includes a setting value of a brightness menu of the display; and

The backlight brightness of the display is adjusted to the corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display have a power function relationship.
The display brightness control method according to claim 1, wherein the adjusting the backlight brightness of the display to the corresponding backlight brightness according to the set value of the brightness menu comprises:

obtaining the target register value corresponding to the set value of the brightness menu; and

The register value of the backlight brightness control chip of the display is adjusted to the target register value.
The display brightness control method according to claim 2, wherein before acquiring the target register value corresponding to the set value, the method further comprises:

Determine the backlight brightness corresponding to each setting value in the brightness menu according to the power function relationship;

Determine the corresponding respective register values according to the backlight brightness corresponding to the respective set values; and

A mapping relationship between the respective set values and the respective register values is established.
The display brightness control method according to any one of claims 1-3, wherein the power of the power function is the reciprocal of a preset human eye gamma value.
The display brightness control method according to claim 4, wherein the corresponding relationship between the set value of the brightness menu and the backlight brightness of the display is expressed by a formula as:

Wherein, L is the backlight brightness of the display, BL is the set value of the brightness menu, BL max is the maximum value of the set value of the brightness menu, and L max is the backlight corresponding to the maximum value of the brightness menu Brightness, gamma is the preset human eye gamma value.
The display brightness control method according to claim 5, wherein, before the backlight brightness of the display is adjusted to a corresponding backlight brightness according to the set value of the brightness menu, the method further comprises:

obtaining the maximum value of the set value of the brightness menu and the backlight brightness corresponding to the maximum value; and

The corresponding relationship between the setting value of the brightness menu and the backlight brightness is determined according to the maximum value and the backlight brightness corresponding to the maximum value.
The display brightness control method according to claim 5, wherein the preset human eye gamma value ranges from 1.8 to 2.5.
A display brightness control device, wherein the display brightness control device comprises:

an instruction receiving module for receiving a brightness adjustment instruction, wherein the brightness adjustment instruction includes a setting value of a brightness menu of the display; and

A brightness adjustment module, configured to adjust the backlight brightness of the display to a corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display are a power functional relationship, the power of the power function is the reciprocal of the preset human eye gamma value.
The display brightness control device according to claim 8, wherein the brightness adjustment module comprises:

a first acquisition module for acquiring the target register value corresponding to the set value of the brightness menu; and

The first adjustment module adjusts the register value of the backlight brightness control chip of the display to the target register value.
The display brightness control device according to any one of claims 8-9, wherein the power of the power function is the reciprocal of a preset human eye gamma value.
The display brightness control device according to claim 10, wherein the corresponding relationship between the setting value of the brightness menu and the backlight brightness of the display is expressed as:

Wherein, L is the backlight brightness of the display, BL is the set value of the brightness menu, BL max is the maximum value of the set value of the brightness menu, and L max is the backlight corresponding to the maximum value of the brightness menu Brightness, gamma is the preset human eye gamma value.
The display brightness control device according to claim 11, wherein the preset human eye gamma value ranges from 1.8 to 2.5.
A terminal, wherein the terminal comprises: a processor and a storage medium communicatively connected to the processor, the storage medium is adapted to store a plurality of signals, and the processor is adapted to call the signals in the storage medium to implement:

receiving a brightness adjustment instruction, wherein the brightness adjustment instruction includes a setting value of a brightness menu of the display; and

The backlight brightness of the display is adjusted to the corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display have a power function relationship.
The terminal according to claim 13, wherein, when the backlight brightness of the display is adjusted to a corresponding backlight brightness according to the set value of the brightness menu, the processor executes:

obtaining the target register value corresponding to the set value of the brightness menu; and

The register value of the backlight brightness control chip of the display is adjusted to the target register value.
The terminal according to claim 14, wherein, before acquiring the target register value corresponding to the set value, the processor executes:

Determine the backlight brightness corresponding to each setting value in the brightness menu according to the power function relationship;

Determine the corresponding respective register values according to the backlight brightness corresponding to the respective set values; and

A mapping relationship between the respective set values and the respective register values is established.
The terminal according to any one of claims 13-15, wherein the power of the power function is the reciprocal of a preset human eye gamma value.
The terminal according to claim 16, wherein the corresponding relationship between the setting value of the brightness menu and the backlight brightness of the display is expressed by a formula as:

Wherein, L is the backlight brightness of the display, BL is the set value of the brightness menu, BL max is the maximum value of the set value of the brightness menu, and L max is the backlight corresponding to the maximum value of the brightness menu Brightness, gamma is the preset human eye gamma value.
The terminal according to claim 16, wherein, before adjusting the backlight brightness of the display to a corresponding backlight brightness according to the set value of the brightness menu, the processor executes:

obtaining the maximum value of the set value of the brightness menu and the backlight brightness corresponding to the maximum value; and

The corresponding relationship between the setting value of the brightness menu and the backlight brightness is determined according to the maximum value and the backlight brightness corresponding to the maximum value.
The terminal according to claim 16, wherein the preset human eye gamma value ranges from 1.8 to 2.5.
A computer-readable storage medium, wherein the computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors to realize:

receiving a brightness adjustment instruction, wherein the brightness adjustment instruction includes a setting value of a brightness menu of the display; and

The backlight brightness of the display is adjusted to the corresponding backlight brightness according to the set value of the brightness menu, wherein the set value of the brightness menu and the backlight brightness of the display have a power function relationship.