CN113889017B - Display brightness adjusting method and device, electronic equipment and storage medium - Google Patents

Display brightness adjusting method and device, electronic equipment and storage medium Download PDF

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Publication number
CN113889017B
CN113889017B CN202111159839.6A CN202111159839A CN113889017B CN 113889017 B CN113889017 B CN 113889017B CN 202111159839 A CN202111159839 A CN 202111159839A CN 113889017 B CN113889017 B CN 113889017B
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gray scale
brightness
display
target
gray
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CN113889017A (en
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赵乙卓
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TCL Huaxing Photoelectric Technology Co Ltd
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TCL Huaxing Photoelectric Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters

Abstract

The application discloses a display brightness adjusting method, a device, electronic equipment and a storage medium. The method comprises the following steps: acquiring the gray scale number to be displayed and the working frequency to be displayed of a display screen; determining a target gray scale value of the gray scale number to be displayed under the working frequency according to a preset gray scale compensation mapping table; determining the data voltage of the pixel circuit of the display screen under the gray scale number to be displayed according to the target gray scale value; and controlling the pixel circuit to display the gray scale number to be displayed under the working frequency according to the data voltage. The embodiment of the application is used for solving the problem that the same picture has different brightness under different frequencies of the display with the Free-Sync technology, so as to improve the problem of picture flickering when the working frequency of the display changes, and further improve the quality of the display.

Description

Display brightness adjusting method and device, electronic equipment and storage medium
Technical Field
The application relates to the technical field of display, in particular to a display brightness adjusting method, a device, electronic equipment and a storage medium.
Background
Typically, the display will be fixed at a certain frequency, such as the most common 60Hz, when in operation; under certain specific conditions, the display is often required to display at a higher refresh rate, and the Free-Sync technology can enable the AMD display card and the APU to directly and dynamically control the refresh rate of the display connected with the AMD display card and the APU. The charging time of each frame of the highest frequency and the lowest frequency of the display carrying the Free-Sync technology is the same, and the difference is that the blanking time is different between two frames, and the blanking time is longer than that of the high frame rate because the low frame rate has a longer duration of each frame. And the influence of panel leakage is aggravated by excessively long blanking time, so that the panel brightness is reduced as a whole. If the display is switched back and forth between different frequencies in a short time, the panel flicker is serious due to the difference in brightness at the different frequencies.
At present, the brightness compensation of a low-frequency area is carried out by modifying the adjustment voltage, so that the flicker problem of the display is improved. However, controlling the Power Management IC (PMIC) to modify the voltage has two problems, namely, the adjustment of each gray level of 0 to 255 cannot be performed, and the fine compensation cannot be performed due to the accuracy limitation of PMIC.
Disclosure of Invention
The embodiment of the application provides a display brightness adjusting method, a device, electronic equipment and a storage medium, which are used for solving the problem that the same picture brightness of a display with a Free-Sync technology is different under different frequencies, so as to improve the problem that the picture flickers when the working frequency of the display changes, and further improve the quality of the display.
In a first aspect, an embodiment of the present application provides a method for adjusting brightness of a display, including:
acquiring the gray scale number to be displayed and the working frequency to be displayed of a display screen;
determining a target gray scale value of the gray scale number to be displayed under the working frequency according to a preset gray scale compensation mapping table;
determining the data voltage of the pixel circuit of the display screen under the gray scale number to be displayed according to the target gray scale value;
and controlling the pixel circuit to display the gray scale number to be displayed under the working frequency according to the data voltage.
In some embodiments, before the obtaining the gray scale number to be displayed and the working frequency to be displayed of the display screen, the method includes:
adjusting the brightness of the display to preset brightness under the target gray scale number of the target frequency, and determining a compensation gray scale value;
and determining the gray level compensation mapping table according to the target frequency, the target gray level number and the compensation gray level value.
In some embodiments, the preset brightness includes a first brightness, and the adjusting the brightness of the display to the preset brightness at the target gray scale number of the target frequency, determining the compensation gray scale value includes:
and adjusting the brightness of the display to the first brightness under the target gray scale number of the target frequency, and determining a compensation gray scale value, wherein the first brightness is set to be the brightness corresponding to the target gray scale number under the highest working frequency of the display screen.
In some embodiments, the determining, according to a preset gray-scale compensation mapping table, the target gray-scale value of the gray-scale to be displayed at the working frequency includes:
if the gray scale compensation mapping table does not contain the working frequency and/or the gray scale number to be displayed, determining a target gray scale value of the gray scale number to be displayed under the working frequency by an interpolation method.
In some embodiments, the adjusting the brightness of the display to a preset brightness at the target gray scale number of the target frequency, and determining the compensation gray scale value, includes:
and compensating the positive polarity pixel and/or the negative polarity pixel of the display under the target gray scale number of the target frequency, adjusting the brightness of the display to the preset brightness, and determining the compensation gray scale value.
In some embodiments, the compensating the positive polarity pixel and the negative polarity pixel of the display at the target gray scale number of the target frequency adjusts the brightness of the display to a preset brightness, and determining the compensated gray scale value includes:
compensating the positive polarity pixel and the negative polarity pixel according to the same initial gray scale value under the target gray scale number of the target frequency, and adjusting the brightness of the display to second brightness, wherein the difference value between the second brightness and the preset brightness does not exceed the preset fluctuation range;
and continuously compensating the polar pixel based on the initial gray scale value, and regulating the brightness of the display to preset brightness to obtain the compensation gray scale value of the polar pixel, wherein the polar pixel is the positive polarity pixel or the negative polarity pixel, and the initial gray scale value is the compensation gray scale value of the polar pixel which is not subjected to compensation independently.
In some embodiments, the absolute value of the difference between the compensated gray-scale value of the positive polarity pixel and the compensated gray-scale value of the negative polarity pixel is no greater than 1.
In a second aspect, the present application provides a display brightness adjustment device, including:
the data acquisition module is used for acquiring the gray scale number to be displayed and the working frequency to be displayed of the display screen;
the target acquisition module is in communication connection with the data acquisition module and is used for determining a target gray scale value of the gray scale number to be displayed at the working frequency according to a preset gray scale compensation mapping table;
the parameter analysis module is in communication connection with the target acquisition module and is used for determining the data voltage of the pixel circuit of the display screen under the gray scale number to be displayed according to the target gray scale value;
and the parameter execution module is in communication connection with the parameter analysis module and is used for controlling the pixel circuit to display the gray scale number to be displayed under the working frequency according to the data voltage.
In some embodiments, the data acquisition module is further configured to adjust the brightness of the display to a preset brightness at a target gray scale number of a target frequency, and determine a compensation gray scale value; and determining the gray level compensation mapping table according to the target frequency, the target gray level number and the compensation gray level value.
In some embodiments, the data acquisition module is further configured to adjust, at a target gray scale number of a target frequency, the brightness of the display to the first brightness, determine a compensation gray scale value, where the first brightness is set to a brightness corresponding to the target gray scale number at a highest operating frequency of the display screen, and the preset brightness includes the first brightness.
In some embodiments, the target obtaining module is further configured to determine, by interpolation, a target gray-scale value of the gray-scale to be displayed at the operating frequency if the operating frequency and/or the gray-scale to be displayed are not included in the gray-scale compensation mapping table, where the target frequency is set at intervals, and the target gray-scale is set at intervals.
In some embodiments, the data acquisition module is further configured to compensate the positive polarity pixel and/or the negative polarity pixel of the display at a target gray scale number of the target frequency, adjust the brightness of the display to a preset brightness, and determine a compensated gray scale value.
In some embodiments, the data acquisition module is further configured to compensate the positive polarity pixel and the negative polarity pixel according to the same initial gray scale value under a target gray scale number of a target frequency, and adjust the brightness of the display to a second brightness, where a difference between the second brightness and the preset brightness does not exceed a preset fluctuation range; and continuously compensating the polar pixel based on the initial gray scale value, and regulating the brightness of the display to preset brightness to obtain the compensation gray scale value of the polar pixel, wherein the polar pixel is the positive polarity pixel or the negative polarity pixel, and the initial gray scale value is the compensation gray scale value of the polar pixel which is not subjected to compensation independently.
In some embodiments, the absolute value of the difference between the compensated gray-scale value of the positive polarity pixel and the compensated gray-scale value of the negative polarity pixel is no greater than 1.
In a third aspect, the present application provides an electronic device comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the steps in any of the display brightness adjustment methods.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program for execution by a processor to perform the steps of any of the display brightness adjustment methods described herein.
According to the display brightness adjusting method, the display brightness adjusting device, the electronic equipment and the storage medium, the target gray scale value of the gray scale number to be displayed under the working frequency is determined through the preset gray scale compensation mapping table, and then the output of the target gray scale value is achieved through controlling the data voltage of the pixel circuit of the display screen. The gray scale compensation method has the advantages that each gray scale can be adjusted through control data voltage, the compensation precision is higher, in addition, the brightness of a display screen is controlled to be stable all the time through the target gray scale value determined by the gray scale compensation mapping table, the problem that the same picture brightness of a display with a Free-Sync technology is different under different frequencies is solved, the problem that the picture flickers when the working frequency of the display is changed is solved, and therefore the quality of the display is improved.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method for adjusting brightness of a display according to an embodiment of the present application;
FIG. 2 is a diagram showing waveforms of brightness of a display screen when different frequencies are switched in an embodiment of the present application;
FIG. 3 is a schematic diagram of a gray-scale compensation mapping table according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a gray-scale compensation mapping table with a target frequency and a target gray-scale number set at intervals in an embodiment of the present application;
FIG. 5 is a schematic diagram of a display brightness adjusting device according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an electronic device in 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 drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
Referring to fig. 1, an embodiment of the present application provides a method for adjusting brightness of a display, including steps S101 to S104, specifically as follows:
s101, acquiring the gray scale number to be displayed and the working frequency to be displayed of the display screen.
The number of gray scales to be displayed is the number of gray scales required by the picture display of the display screen, and the working frequency is the refresh rate of the display screen, such as 60 Hz. The display screen needs to be controlled to display the gray scale number to be displayed at the working frequency.
It should be noted that the display screen may not play any picture currently, so the number of gray scales to be displayed at the operating frequency is directly adjusted. The display screen may be in an operating state at present, and displays the picture at a certain frequency, where the certain frequency may be the same as or different from the operating frequency.
When the certain frequency is different from the working frequency, as shown in fig. 2, fig. 2 is a brightness waveform diagram of the display screen when the different frequencies are switched, the frames of the high-frequency period are densely arranged, and the overall brightness is higher; the frames in the low-frequency period are arranged sparsely, the overall brightness is low, and the brightness fluctuation caused by electric leakage is large, so that the display flicker is very serious. Therefore, the brightness of the low frequency period can be increased by adjusting the voltage or gray scale data of the low frequency period, thereby compensating for the brightness difference between the low frequency and high frequency regions.
S102, determining the target gray scale value of the gray scale number to be displayed under the working frequency according to a preset gray scale compensation mapping table.
Wherein, each gray scale number under different working frequencies in the gray scale compensation mapping table corresponds to each compensation gray scale value. The setting range of the working frequency in the gray-scale compensation mapping table is from the lowest frequency supported by the display to the highest frequency supported by the display, for example, 60Hz to 120Hz, and the gray scale number is the gray scale number supported by the display, for example, 0 to 255 gray scales. In the gray level compensation mapping table, each gray level number corresponding to each working frequency corresponds to a group of compensated gray level values compensated under the working frequency. For example, the highest refresh rate supported by the display is 120Hz, the compensation gray scale value corresponding to the gray scale number L127 at 120Hz in the gray scale compensation mapping table is L127, the compensation gray scale value corresponding to the gray scale number L127 at 48Hz is L132, and the display outputs the L127 gray scale at 120Hz and the display outputs the L132 gray scale at 48 Hz.
Therefore, the compensation gray scale value of the gray scale to be displayed at the working frequency, that is, the target gray scale value of the gray scale to be displayed, is determined according to the preset gray scale compensation mapping table. After the operating frequency and the number of gray levels to be displayed are determined, the target gray level value is also the uniquely determined value.
In one embodiment, step S101 includes, before acquiring the number of gray scales to be displayed and the operating frequency to be displayed of the display screen: s201, adjusting the brightness of the display to a preset brightness under the target gray scale number of a target frequency, and determining a compensation gray scale value; s202, determining the gray-scale compensation mapping table according to the target frequency, the target gray-scale number and the compensation gray-scale value.
Wherein the target frequency is any frequency in a range from the lowest frequency supported by the display to the highest frequency supported by the display, for example, the lowest frequency to the highest frequency is 60Hz to 120Hz, then the target frequency may be any frequency in the range of 60Hz to 120 Hz. The target gray scale is any gray scale of the gray scales supported by the display, for example, the gray scale supported by the display is 0 to 255 gray scales, and the target gray scale can be any gray scale of 0 to 255 gray scales.
The following procedure of obtaining the compensation gray scale value corresponding to any one of the target frequency and the target gray scale is described, but the method of obtaining the compensation gray scale value of all the target frequency and the target gray scale is the same and is performed according to the following procedure.
Outputting the target gray scale number at the selected target frequency, and if the displayed brightness of the target gray scale number is the same as the preset brightness or the difference is within the preset error range, directly taking the target gray scale number as the compensation gray scale value without gray scale compensation of the target gray scale number at the selected target frequency. Otherwise, gray-scale compensation is needed, the brightness of the display is adjusted to the preset brightness, and the adjusted gray-scale number is used as a compensation gray-scale value corresponding to the target gray-scale number.
In order to ensure that the brightness change is not caused by frequency switching when the display screen displays any working frequency and gray scale number to be displayed, all target gray scale numbers under the target frequency are adjusted to the same preset brightness when the display screen displays.
The gray-scale compensation mapping table is determined according to the target frequency, the target gray-scale number and the compensation gray-scale value, fig. 3 is an example of a gray-scale compensation mapping table, and after the gray-scale compensation mapping table is obtained, the corresponding compensation gray-scale value can be obtained by looking up a table according to the target frequency and the target gray-scale number.
In one embodiment, step S201, at a target gray scale number of a target frequency, adjusts the brightness of the display to a preset brightness, and determines a compensation gray scale value, where the preset brightness includes a first brightness, and includes: s301, adjusting the brightness of the display to the first brightness under the target gray scale number of the target frequency, and determining a compensation gray scale value, wherein the first brightness is set to be the brightness corresponding to the target gray scale number under the highest working frequency of the display screen.
The display has the highest brightness when working at the highest allowable frequency, and the preset brightness comprises the first brightness which is set to be the brightness corresponding to each target gray scale number of the display screen at the highest working frequency in order to facilitate gray scale compensation and keep the stability of the brightness of the display screen.
Outputting a target gray scale number at the selected target frequency, and adjusting the brightness of the display to the first brightness. If the target frequency is the highest working frequency of the display screen, the target gray scale is the corresponding compensation gray scale value, for example, the highest refresh rate supported by the display is 120Hz, and when the selected target frequency is 120Hz and the target gray scale is L127, the compensation gray scale value corresponding to the target gray scale L127 in the gray scale compensation mapping table is also L127. If the target frequency is not the highest operating frequency of the display screen, the brightness of the display is adjusted to the brightness corresponding to the target gray scale number under the highest operating frequency, for example, the highest refresh rate supported by the display is 120Hz, when the selected target frequency is 48Hz, the target gray scale number is L127, the brightness of L127 under 48Hz is lower than that of L127 under 120Hz, therefore, when L127 under 48Hz is selected, L127 cannot be directly output, gray scale compensation is needed, when the brightness of the display is adjusted to be the same as that of L127 under 120Hz, the gray scale number is L132, and the target frequency is 48Hz, and the corresponding compensation gray scale value under L127 is L132.
In this embodiment, the preset brightness is set to be the brightness corresponding to each target gray scale number under the highest working frequency of the display screen, that is, the brightness under the highest working frequency is used as the standard, when the display is in the low-frequency working state, the brightness of the picture is compensated, so that the display keeps the same brightness no matter what frequency is in operation, and the brightness change caused by frequency switching is avoided.
In one embodiment, step S102, determining, according to a preset gray-scale compensation mapping table, a target gray-scale value of the gray-scale number to be displayed at the working frequency, where the target frequency is set at intervals, and the setting of the target gray-scale number interval includes: 401, if the gray-scale compensation mapping table does not include the working frequency and/or the gray-scale number to be displayed, determining a target gray-scale value of the gray-scale number to be displayed at the working frequency by an interpolation method.
On one hand, the target frequency and the target gray scale number acquire corresponding compensation gray scale values one by one, the workload is large, the required time is more, and a large number of repeated works are quite boring. On the other hand, the data volume contained in the gray level compensation mapping table is too large, so that more storage resources are needed, and the requirement on equipment is high. Therefore, the target frequency and the target gray scale number in the gray scale compensation mapping table may be set at intervals, one of the parameters may be set at intervals, or both of the parameters may be set at intervals, for example, the target frequency and the target gray scale number adjacent to each other in the gray scale compensation mapping table shown in fig. 3 do not jump, for example, the target frequency and the target gray scale number adjacent to 48Hz are set at intervals, for example, 54Hz adjacent to 48Hz, 8 gray scales adjacent to 4 gray scales, and the like in the gray scale compensation mapping table shown in fig. 4.
Therefore, the working frequency and the number of gray scales to be displayed may not be included in the gray scale compensation map by looking up the table. The target frequency and the target gray scale number in the gray scale compensation mapping table are sequentially arranged from small to large or from large to small, and the target gray scale value of the gray scale number to be displayed under the working frequency is determined through an interpolation method.
When the gray-scale compensation mapping table contains the working frequency but does not contain the gray-scale to be displayed, the compensation gray-scale values of the gray-scale numbers adjacent to the gray-scale to be displayed can be determined by interpolation according to the working frequency. For example, as shown in the gray-scale compensation mapping table in fig. 4, when the target frequency is 48Hz and the target gray-scale number is 6 gray-scales, the compensation gray-scale value corresponding to the 6 gray-scales is determined by interpolation through the compensation gray-scale values of the 4 gray-scales and the 8 gray-scales under 48 Hz.
When the gray-scale compensation mapping table does not contain the working frequency but contains the gray-scale to be displayed, the compensation gray-scale value of the gray-scale to be displayed can be determined by an interpolation method according to the adjacent frequency of the working frequency. For example, as shown in the gray-scale compensation mapping table in fig. 4, when the target frequency is 50Hz and the target gray-scale number is 4 gray-scales, the compensation gray-scale value corresponding to the 4 gray-scales at 50Hz is determined by interpolation through the compensation gray-scale values of the 4 gray-scales at 48Hz and 54 Hz.
When the gray-scale compensation mapping table contains neither the working frequency nor the gray-scale to be displayed, the compensation gray-scale value of the gray-scale adjacent to the gray-scale to be displayed can be determined by interpolation according to the frequency adjacent to the working frequency. For example, as shown in the gray-scale compensation mapping table in fig. 4, when the target frequency is 50Hz and the target gray-scale number is 6 gray-scales, the line determines the compensation gray-scale values corresponding to the 4 gray-scales and the 8 gray-scales at 50Hz through interpolation by using the compensation gray-scale values corresponding to the 4 gray-scales and the 8 gray-scales at 48Hz and 54Hz, and then determines the compensation gray-scale value corresponding to the 6 gray-scales at 50Hz by using the compensation gray-scale values corresponding to the 4 gray-scales and the 8 gray-scales at 50 Hz.
It should be noted that the interpolation method is exemplified for further understanding of the explanation of the scheme, and should not be construed as limiting the present embodiment.
In addition, the target frequency and the target gray scale are set at intervals, the selection of the target frequency and the target gray scale can be set freely, and only the compensation gray scale values of the target frequency and the target gray scale which are not contained in the gray scale compensation mapping table are required to be obtained according to the analysis of the compensation gray scale values of other gray scales. Therefore, the compensation gray scale values of all the target frequencies and the target gray scales can be obtained, the rule of the compensation gray scale values is analyzed, and the compensation gray scale values of the target frequencies and the target gray scales conforming to the rule of the interpolation method are omitted from the gray scale compensation mapping table. Therefore, the target frequency and the target gray scale number are set at intervals, and the interval number can be fixed, for example, the target frequency in the gray scale compensation mapping table is 48Hz, 54Hz, 60Hz, etc. in sequence, or random, for example, the target frequency in the gray scale compensation mapping table is 48Hz, 50Hz, 60Hz, etc. in sequence.
In one embodiment, step S201, at a target gray scale number of a target frequency, adjusts the brightness of the display to a preset brightness, and determines a compensation gray scale value, including: and 501, compensating positive polarity pixels and/or negative polarity pixels of the display under the target gray scale number of the target frequency, adjusting the brightness of the display to a preset brightness, and determining a compensation gray scale value.
Specifically, the display is lighted by controlling the lighting of the positive polarity pixel and the negative polarity pixel, so that the brightness of the display is adjusted to the preset brightness at the target gray scale number of the target frequency, which is to compensate the positive polarity pixel and the negative polarity pixel of the display, and the positive polarity pixel and the negative polarity pixel are determined.
One of the positive polarity pixel and the negative polarity pixel may be compensated singly or both may be compensated simultaneously. Only the pixel with a certain single polarity is compensated, the obtained compensation effect is between the two conditions of uncompensation and simultaneous compensation of positive and negative polarities, and higher compensation precision can be obtained by simultaneously compensating the two conditions.
In one embodiment, step S501, at a target gray scale number of a target frequency, compensates a positive polarity pixel and a negative polarity pixel of the display, adjusts the brightness of the display to a preset brightness, and determines a compensated gray scale value, including: s601, compensating the positive polarity pixel and the negative polarity pixel according to the same initial gray scale value under the target gray scale number of the target frequency, and adjusting the brightness of the display to a second brightness, wherein the difference value between the second brightness and the preset brightness does not exceed the preset fluctuation range; and S602, continuously compensating the polar pixel based on the initial gray scale value, and regulating the brightness of the display to a preset brightness to obtain a compensated gray scale value of the polar pixel, wherein the polar pixel is the positive polarity pixel or the negative polarity pixel, and the initial gray scale value is the compensated gray scale value of the polar pixel which is not compensated independently.
Specifically, under the target gray scale number of the selected target frequency, the positive polarity pixel and the negative polarity pixel are compensated according to the same initial gray scale value, and the initial gray scale value may need to be adjusted for multiple times in the compensation process until the brightness of the display is adjusted to the second brightness. Compensating the positive polarity pixel and the negative polarity pixel according to the initial gray scale value is equivalent to first performing coarse adjustment to enable the brightness to reach the second brightness, wherein the difference value between the second brightness and the preset brightness does not exceed the preset fluctuation range, and the preset fluctuation range can be set according to the progress requirement.
In addition, if the compensation is continuously performed on the positive polarity pixel and the negative polarity pixel at the same time on the basis of the initial gray scale value, the brightness cannot be further close to the preset brightness, so that one of the positive polarity pixel and the negative polarity pixel is selected to continuously perform the compensation, so that the brightness of the display is adjusted to the preset brightness, and the compensation gray scale value of the polarity pixel is obtained. If the positive polarity pixel is selected to be compensated, the compensation gray scale value of the positive polarity pixel is obtained finally, and the initial gray scale value is the compensation gray scale value of the negative polarity pixel. If the negative polarity pixel is selected to be compensated, the compensation gray scale value of the negative polarity pixel is obtained finally, and the initial gray scale value is the compensation gray scale value of the positive polarity pixel.
For example, when the preset brightness is the brightness corresponding to each target gray scale number under the highest working frequency of the display screen, for the adjustment of the compensation gray scale value, a brightness measuring instrument, such as CA410, may be used for adjustment. The debugging method comprises the steps of firstly compensating positive polarity pixels and negative polarity pixels simultaneously, measuring preset brightness corresponding to each gray scale under the highest frequency of a display, then gradually reducing the frequency, measuring the brightness of each gray scale, gradually increasing the gray scale if the brightness is lower than the preset brightness, and enabling the preset brightness corresponding to the original gray scale under the highest frequency to be kept consistent as much as possible, sequentially debugging to enable the brightness to reach second brightness, wherein the debugging compensation is an initial gray scale value, and the difference value between the second brightness and the preset brightness does not exceed the preset fluctuation range. And then selecting one of the polar pixels for debugging, and adjusting the gray scale upwards or downwards on the basis of the initial gray scale value to enable the compensated brightness to be closer to the original brightness.
In one embodiment, the absolute value of the difference between the compensated gray-scale value of the positive polarity pixel and the compensated gray-scale value of the negative polarity pixel is not greater than 1. For example: the highest refresh rate supported by the display is 120Hz, then the L127 gray scale at 120Hz is realized, when the display is at 48Hz, the positive polarity pixel is compensated to L132, the negative polarity pixel is compensated to L131, and compared with the positive and negative polarity pixel which is simultaneously compensated to L132, the low-frequency brightness compensated by the method is closer to L127 at 120 Hz. However, it should be noted that the positive and negative polarities differ by at most ±1 gray scale for two reasons: firstly, if the phase difference is larger than 1, the same compensation effect can be obtained by taking the average value of the phase differences; secondly, if the difference between the gray levels of the positive and negative polarity pixels IS too large, the IS problem can occur, and the image IS left.
S103, determining the data voltage of the pixel circuit of the display screen under the gray scale number to be displayed according to the target gray scale value.
If the display is switched back and forth between different frequencies in a short time, the panel flicker is serious due to the difference of brightness at different frequencies. The flicker problem of the display can be improved by modifying the gray scale data (the data voltage of the pixel circuit) or adjusting the voltage to perform the brightness compensation in the low frequency region.
The direct modification of data (data voltage of the pixel circuit) can achieve higher accuracy than the manner in which the PMIC modification voltage is controlled. Because if only the control voltage in the PMIC is modified, two problems occur, one is that each gray level of 0 to 255 cannot be adjusted, and the other is that too fine compensation cannot be performed due to the accuracy limitation of the PMIC, and the modification of data can avoid the problems described above. The gamma of the display deviates from the standard by 2.2 due to the aggravation of the leakage at low frequency, and the gamma of the display can be kept at 2.2 all the time at different frequencies as much as possible through data compensation. Therefore, the data voltage of the pixel circuit of the display screen under the gray scale number to be displayed is determined according to the target gray scale value.
And S104, controlling the pixel circuit to display the gray scale number to be displayed under the working frequency according to the data voltage.
Specifically, the pixel circuit is controlled to display the gray scale number to be displayed under the working frequency according to the adjustment data voltage. When the front end detects that the frequency of the display is changed, a group of new gray scale corresponding relations are obtained from the gray scale compensation mapping table in a table look-up mode according to the changed working frequency to be displayed and the gray scale number to be displayed, and the target gray scale value is not determined. Such as: the highest refresh rate supported by the display is 120Hz, if the highest refresh rate is 120Hz, in the gray level compensation mapping table, the gray level corresponding to the L127 at 120Hz is L127, and the gray level corresponding to the L127 at 48Hz is L132, the L127 gray level of the display is originally 120Hz, and the gray level is output as L132 gray level at 48 Hz. Meanwhile, the data voltage of the pixel circuit of the display screen is controlled to output the target gray scale value.
The display device is used for solving the problem that the same picture has different brightness under different frequencies of the display device with the Free-Sync technology, so as to improve the problem that the picture flickers when the working frequency of the display device changes, and further improve the quality of the display device.
In order to better implement the display brightness adjustment method in the embodiments of the present application, on the basis of the display brightness adjustment method, a display brightness adjustment device is further provided in the embodiments of the present application, as shown in fig. 5, a display brightness adjustment device 100 includes:
The data acquisition module 110 is configured to acquire a gray scale number to be displayed and a working frequency to be displayed of the display screen;
the target acquisition module 120 is in communication connection with the data acquisition module 110, and is configured to determine a target gray-scale value of the gray-scale number to be displayed at the working frequency according to a preset gray-scale compensation mapping table;
the parameter analysis module 130 is in communication connection with the target acquisition module 120, and is used for determining the data voltage of the pixel circuit of the display screen under the gray scale number to be displayed according to the target gray scale value;
the parameter execution module 140 is in communication connection with the parameter analysis module 130, and is configured to control the pixel circuit to display the gray scale number to be displayed at the working frequency according to the data voltage.
In some embodiments of the present application, the data acquisition module 110 is further configured to adjust the brightness of the display to a preset brightness at a target gray scale number of a target frequency, and determine a compensation gray scale value; and determining the gray level compensation mapping table according to the target frequency, the target gray level number and the compensation gray level value.
In some embodiments of the present application, the data obtaining module 110 is further configured to adjust, at a target gray scale number of a target frequency, the brightness of the display to the first brightness, determine a compensation gray scale value, where the first brightness is set to be the brightness corresponding to the target gray scale number at the highest working frequency of the display screen, and the preset brightness includes the first brightness.
In some embodiments of the present application, the target obtaining module 120 is further configured to determine, by interpolation, a target gray-scale value of the gray-scale to be displayed at the working frequency if the working frequency and/or the gray-scale to be displayed are not included in the gray-scale compensation mapping table, where the target frequency is set at intervals, and the target gray-scale is set at intervals.
In some embodiments of the present application, the data acquisition module 110 is further configured to compensate the positive polarity pixel and/or the negative polarity pixel of the display at the target gray scale number of the target frequency, adjust the brightness of the display to a preset brightness, and determine the compensated gray scale value.
In some embodiments of the present application, the data obtaining module 110 is further configured to compensate the positive polarity pixel and the negative polarity pixel according to the same initial gray scale value under the target gray scale number of the target frequency, and adjust the brightness of the display to a second brightness, where a difference value between the second brightness and the preset brightness does not exceed a preset fluctuation range; and continuously compensating the polar pixel based on the initial gray scale value, and regulating the brightness of the display to preset brightness to obtain the compensation gray scale value of the polar pixel, wherein the polar pixel is the positive polarity pixel or the negative polarity pixel, and the initial gray scale value is the compensation gray scale value of the polar pixel which is not subjected to compensation independently.
In some embodiments of the present application, the absolute value of the difference between the compensated gray-scale value of the positive polarity pixel and the compensated gray-scale value of the negative polarity pixel is not greater than 1.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In some embodiments of the present application, the display brightness adjustment device 100 may be implemented in the form of a computer program that is executable on an electronic device as shown in fig. 6. The memory of the electronic device may store various program modules constituting the display brightness adjustment device 100, such as the data acquisition module 110, the object acquisition module 120, the parameter analysis module 130, and the parameter execution module 140 shown in fig. 5. The computer program constituted by the respective program modules causes the processor to execute the steps in the display luminance adjustment method of the respective embodiments of the present application described in the present specification.
For example, the electronic apparatus shown in fig. 6 may perform step S201 through the data acquisition module 110 in the display brightness adjustment device 100 as shown in fig. 5. The electronic device may perform step S202 through the target acquisition module 120. The electronic device may perform step S203 through the parameter analysis module 130. The electronic device may execute step S204 through the parameter execution module 140. The electronic device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the electronic device is used for communicating with external electronic devices through network connection. The computer program is executed by a processor to implement a method of adjusting display brightness.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the electronic device to which the present application is applied, and that a particular electronic device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In some embodiments of the present application, an electronic device is provided that includes one or more processors; a memory; and one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to perform the steps of the display brightness adjustment method described above. The steps of the display luminance adjustment method herein may be the steps of the display luminance adjustment method of each of the above embodiments.
In some embodiments of the present application, a computer readable storage medium is provided, in which a computer program is stored, where the computer program is loaded by a processor, so that the processor performs the steps of the above-mentioned display brightness adjustment method. The steps of the lamp control method may be the steps of the display brightness adjustment method of each of the above embodiments.
Those of ordinary skill in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program that instructs associated hardware to perform the methods described above, and that the computer program may be stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein can include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can take many forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing has described in detail the methods, apparatuses, electronic devices and computer readable storage medium for adjusting brightness of a display according to the embodiments of the present application, and specific examples have been applied to illustrate the principles and embodiments of the present invention, where the above description of the embodiments is only for helping to understand the methods and core ideas of the present invention; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present invention, the present description should not be construed as limiting the present invention in summary.

Claims (8)

1. A method for adjusting brightness of a display, comprising:
adjusting the brightness of the display to preset brightness under the target gray scale number of the target frequency, and determining a compensation gray scale value; the method specifically comprises the following steps: compensating the positive polarity pixel and the negative polarity pixel according to the same initial gray scale value under the target gray scale number of the target frequency, and adjusting the brightness of the display to second brightness, wherein the difference value between the second brightness and the preset brightness does not exceed the preset fluctuation range; continuously compensating the polar pixel based on the initial gray scale value, and regulating the brightness of the display to preset brightness to obtain a compensating gray scale value of the polar pixel, wherein the polar pixel is the positive polar pixel or the negative polar pixel, and the initial gray scale value is the compensating gray scale value of the polar pixel which is not compensated independently;
Determining the gray-scale compensation mapping table according to the target frequency, the target gray-scale number and the compensation gray-scale value;
acquiring the gray scale number to be displayed and the working frequency to be displayed of a display screen;
determining a target gray scale value of the gray scale number to be displayed under the working frequency according to a preset gray scale compensation mapping table;
determining the data voltage of the pixel circuit of the display screen under the gray scale number to be displayed according to the target gray scale value;
and controlling the pixel circuit to display the gray scale number to be displayed under the working frequency according to the data voltage.
2. The display brightness adjustment method of claim 1, wherein the preset brightness comprises a first brightness, and wherein the adjusting the brightness of the display to the preset brightness at the target gray scale number of the target frequency, determining the compensation gray scale value, comprises:
and adjusting the brightness of the display to the first brightness under the target gray scale number of the target frequency, and determining a compensation gray scale value, wherein the first brightness is set to be the brightness corresponding to the target gray scale number under the highest working frequency of the display screen.
3. The method for adjusting brightness of a display according to claim 1, wherein the setting of the target frequency interval and the setting of the target gray scale interval, the determining the target gray scale value of the gray scale to be displayed at the operating frequency according to a preset gray scale compensation mapping table, comprises:
If the gray scale compensation mapping table does not contain the working frequency and/or the gray scale number to be displayed, determining a target gray scale value of the gray scale number to be displayed under the working frequency by an interpolation method.
4. The method for adjusting brightness of a display according to claim 1, wherein the adjusting the brightness of the display to a preset brightness at a target gray scale number of a target frequency, determining the compensation gray scale value, comprises:
and compensating the positive polarity pixel and/or the negative polarity pixel of the display under the target gray scale number of the target frequency, adjusting the brightness of the display to the preset brightness, and determining the compensation gray scale value.
5. The display luminance adjustment method according to claim 1, wherein an absolute value of a difference between the compensation gray-scale value of the positive polarity pixel and the compensation gray-scale value of the negative polarity pixel is not more than 1.
6. A display brightness adjustment device, comprising:
the data acquisition module is used for acquiring the gray scale number to be displayed and the working frequency to be displayed of the display screen; the display device is also used for adjusting the brightness of the display to preset brightness under the target gray scale number of the target frequency, and determining a compensation gray scale value; the method specifically comprises the following steps: compensating the positive polarity pixel and the negative polarity pixel according to the same initial gray scale value under the target gray scale number of the target frequency, and adjusting the brightness of the display to second brightness, wherein the difference value between the second brightness and the preset brightness does not exceed the preset fluctuation range; continuously compensating the polar pixel based on the initial gray scale value, and regulating the brightness of the display to preset brightness to obtain a compensating gray scale value of the polar pixel, wherein the polar pixel is the positive polar pixel or the negative polar pixel, and the initial gray scale value is the compensating gray scale value of the polar pixel which is not compensated independently; determining the gray-scale compensation mapping table according to the target frequency, the target gray-scale number and the compensation gray-scale value;
The target acquisition module is in communication connection with the data acquisition module and is used for determining a target gray scale value of the gray scale number to be displayed at the working frequency according to a preset gray scale compensation mapping table;
the parameter analysis module is in communication connection with the target acquisition module and is used for determining the data voltage of the pixel circuit of the display screen under the gray scale number to be displayed according to the target gray scale value;
and the parameter execution module is in communication connection with the parameter analysis module and is used for controlling the pixel circuit to display the gray scale number to be displayed under the working frequency according to the data voltage.
7. An electronic device comprising a processor, a memory and a computer program stored in the memory and executable on the processor, the processor executing the computer program to perform the steps in the display brightness adjustment method of any one of claims 1 to 5.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program that is executed by a processor to implement the steps in the display brightness adjustment method of any one of claims 1 to 5.
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