CN114550672B - Display panel brightness compensation method, display panel brightness compensation device and storage medium - Google Patents
Display panel brightness compensation method, display panel brightness compensation device and storage medium Download PDFInfo
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- CN114550672B CN114550672B CN202210327327.4A CN202210327327A CN114550672B CN 114550672 B CN114550672 B CN 114550672B CN 202210327327 A CN202210327327 A CN 202210327327A CN 114550672 B CN114550672 B CN 114550672B
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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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
- 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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
- G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
Abstract
In the display panel brightness compensation method, the display panel brightness compensation device and the storage medium provided by the embodiment of the application, before the brightness information required by gamma voltage correction and compensation is obtained, the stability of the display picture is judged. The embodiment of the application judges the stability of the display picture in advance, firstly, the acquired brightness information can be ensured to be accurate, and the compensation effect of the brightness of the subsequent display picture is not influenced; secondly, the waiting time before extracting the brightness information can be shortened, so that the whole time of brightness compensation of the display panel is shortened, and the display effect of the display panel is improved. In addition, the embodiment provided by the application carries out gamma voltage correction on the display panel, and then compensates the display panel, so that the brightness compensation effect of the display panel can be improved, and the display effect of the display panel can be improved.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a method for compensating brightness of a display panel, a device thereof, and a storage medium.
Background
At present, the liquid crystal display panel cannot realize self-luminescence, so the liquid crystal display panel is required to be matched with the backlight module for use. The conventional lcd panel generally adopts a mini led backlight technology, which refers to a mini led backlight module using a mini led as the lcd panel.
The mini light-emitting diode lamp bead is smaller than the common light-emitting diode lamp bead, so that higher zone control of backlight can be realized. However, when the mini led backlight technology is adopted, compensation is generally required for the lcd panel in order to achieve better gray scale transition and in-plane uniformity display of the lcd panel. When compensation is performed, the brightness of the display panel needs to be detected. Since the liquid crystal requires response time, when detecting the brightness of the display panel, the control device usually waits for a period of time to extract the brightness. By adopting the method for extracting the brightness, the correction time is increased, abnormal brightness detection data is obtained, and the brightness compensation effect of the display panel is poor.
Therefore, how to propose a method, apparatus and storage medium for compensating brightness of a display panel, and to improve the brightness compensation effect of the display panel is a difficulty that the existing panel manufacturers need to struggle to overcome.
Disclosure of Invention
An objective of the embodiments of the present application is to provide a method, an apparatus and a storage medium for compensating brightness of a display panel, which can solve the technical problem of poor brightness compensation effect of the display panel in the prior art.
The embodiment of the application provides a compensation method for brightness of a display panel, which comprises the following steps:
judging whether the first display picture is stable or not;
if the first display picture is stable, correcting the gamma voltage of the first display picture to obtain a second display picture;
acquiring compensation information of the second display picture;
and compensating the second display picture according to the compensation information of the second display picture.
In the method for compensating brightness of a display panel, the specific step of determining whether the first display frame is stable includes:
acquiring a display period of a first display picture;
detecting the first display picture to obtain brightness values of a plurality of continuous display periods of the first display picture;
judging whether the brightness value has an increasing trend or a decreasing trend;
if the brightness value does not have an increasing trend or a decreasing trend, the first display picture is stable.
In the method for compensating the brightness of the display panel, the specific step of obtaining the display period of the first display picture includes:
acquiring a screen refresh rate of the display panel;
and acquiring the display period of the first display picture according to the screen refresh rate of the display panel.
In the method for compensating brightness of a display panel of the present application, the specific step of correcting the gamma voltage of the first display screen includes:
acquiring a brightness value corresponding to the highest gray level of the first display picture;
correcting the brightness value corresponding to each gray level of the first display picture according to a preset formula and the brightness value corresponding to the highest gray level of the first display picture.
In the method for compensating brightness of a display panel, the preset formula is as followsWherein l m For the brightness value corresponding to the highest gray level of the first display picture, l n For the brightness value l corresponding to the n gray scales of the first display picture 0 And m is the highest gray level of the first display picture, n is an integer, and n is more than or equal to 0 and less than or equal to m.
In the method for compensating brightness of a display panel, the specific step of obtaining compensation information of the second display picture includes:
acquiring compensation information of specific gray scale of the second display picture;
and calculating compensation information of other gray scales according to the proportional relation between the specific gray scale and the other gray scales by taking the compensation information of the specific gray scale of the second display picture as a reference.
In the method for compensating brightness of a display panel of the present application, the specific step of obtaining compensation information of the specific gray scale of the second display screen includes:
acquiring first brightness information of a central area of the second display picture and second brightness information of other areas of the second display picture under a specific gray level;
and obtaining a difference value between the first brightness information and the second brightness information, wherein the difference value is the compensation information of the second display picture.
In the method for compensating brightness of a display panel of the present application, the specific step of obtaining compensation information of the specific gray scale of the second display screen includes:
dividing the display picture into a first partition and a plurality of second partitions;
acquiring a first brightness average value of the first partition and a second brightness average value of the second partition under a specific gray level;
and obtaining a difference value of the first brightness average value and the second brightness average value, wherein the difference value is the compensation information of the second display picture.
The embodiment of the application also provides a compensation device for brightness of a display panel, which comprises:
the judging module is used for judging whether the first display picture is stable or not;
the correction module is used for correcting the gamma voltage of the first display picture if the first display picture is stable so as to acquire a second display picture;
the acquisition module is used for acquiring the compensation information of the second display picture;
and the compensation module is used for compensating the display picture according to the compensation information of the second display picture.
The embodiment of the application also provides a storage medium, wherein a program is stored in the storage medium, and the program realizes the compensation method of the brightness of the display panel when being executed.
In the method for compensating brightness of display panel, the device and the storage medium thereof provided by the embodiment of the application, before the brightness information required for gamma voltage correction and compensation is obtained, the stability of the display picture is judged. The embodiment of the application judges the stability of the display picture in advance, firstly, the acquired brightness information can be ensured to be accurate, and the compensation effect of the brightness of the subsequent display picture is not influenced; secondly, the waiting time before extracting the brightness information can be shortened, so that the whole time of brightness compensation of the display panel is shortened, and the display effect of the display panel is improved. In addition, the embodiment provided by the application carries out gamma voltage correction on the display panel, and then compensates the display panel, so that the brightness compensation effect of the display panel can be improved, and the display effect of the display panel can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a first flow chart of a method for compensating brightness of a display panel according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram of a first sub-flowchart of a method for compensating brightness of a display panel according to an embodiment of the present application.
Fig. 3 is a second sub-flowchart of a method for compensating brightness of a display panel according to an embodiment of the present application.
Fig. 4 is a third sub-flowchart of a method for compensating brightness of a display panel according to an embodiment of the present application.
Fig. 5 is a fourth sub-flowchart of a method for compensating brightness of a display panel according to an embodiment of the present application.
Fig. 6 is a fifth sub-flowchart of a method for compensating brightness of a display panel according to an embodiment of the present application.
Fig. 7 is a sixth sub-flowchart of a method for compensating brightness of a display panel according to an embodiment of the present application.
Fig. 8 is a schematic structural diagram of a display panel brightness compensation device according to 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.
Referring to fig. 1, fig. 1 is a first flow chart of a method for compensating brightness of a display panel according to an embodiment of the disclosure. As shown in fig. 1, the brightness compensation method provided in the embodiment of the present application includes:
It should be noted that the display screen stability means that the brightness of the display screen does not have an increasing or decreasing trend, but fluctuates up and down in a section, and the section is not large. For example, in this section, the difference between the highest value and the lowest value of the brightness of the display screen is less than 2nit.
In addition, when the gamma voltage of the display panel is corrected and the brightness is compensated, the brightness information of the display screen needs to be obtained. The unstable brightness information can cause larger deviation between the gamma voltage value and the brightness compensation value when the gamma voltage is corrected and the brightness is compensated, thereby influencing the compensation effect of the display panel and being unfavorable for the display effect of the display panel. Therefore, it is necessary to determine whether or not the display screen is stable before performing correction of the display panel gamma voltage and brightness compensation. The first display picture is a display picture which is not subjected to gamma voltage correction, and the second display picture is a display picture subjected to gamma voltage correction. Therefore, in the gamma voltage correction, it is necessary to determine whether the first display screen is stable.
It should be noted that, when the incident light is from full black to bright, the human eye is already considered bright and very bright. Therefore, it is necessary to perform gamma voltages on the gray scales so that the area with low brightness of the first display screen, i.e., the area displayed in a dark state, is divided into more gray scales for display.
And 103, acquiring compensation information of the second display picture.
In addition, when the uniformity of the display panel is not good, mura phenomenon, which is similar to a bright and dark band, occurs. In particular, the main reason for Mura generation is that the difference in color is perceived visually with different frequency responses to the perceived light source. Therefore, it is necessary to acquire compensation information to be applied to the display data, that is, to acquire compensation information to be applied to the data voltage, thereby realizing uniform display of the display panel.
When the compensation information of the second display screen is acquired, whether the second display screen is stable or not may be determined first, so as to improve the stability of the brightness compensation of the display panel. Of course, since it is also determined whether the first display screen is stable before the gamma voltage correction is performed, the stability determination of the second display screen may not be performed.
And 104, compensating the second display picture according to the compensation information of the second display picture.
Referring to fig. 2, fig. 2 is a schematic diagram of a first sub-flow of a method for compensating brightness of a display panel according to an embodiment of the present disclosure. As shown in fig. 2, step 101 provided in the embodiment of the present application includes:
It should be noted that, when the display panel displays a stable picture, the brightness emitted by the display has two characteristics. Firstly, the method has a periodic variation rule; and secondly, the brightness in unit time is not changed. Therefore, it is necessary to acquire the display period of the first display screen, and acquire the display luminance change region of the first display screen in several display periods, so as to determine whether the first display screen is stable.
Here, the luminance values within 10 consecutive display periods of the first display screen are generally obtained in consideration of the display panel response time and the total length of the correction job. Therefore, the accuracy of judging whether the first display picture is stable can be ensured, the waiting time before extracting the brightness information can be shortened, the whole time of brightness compensation of the display panel is shortened, and the display effect of the display panel is improved.
The luminance value image of the first display screen in the plurality of continuous display periods is obtained by obtaining the luminance values of the first display screen in the plurality of continuous display periods and integrating the luminance values of the first display screen in the plurality of continuous display periods. By observing the image, it can be determined whether the brightness value has an increasing trend or a decreasing trend.
Referring to fig. 3, fig. 3 is a second sub-flowchart of the method for compensating brightness of a display panel according to the embodiment of the present application. As shown in fig. 3, step 1011 provided in the embodiment of the present application includes:
It should be noted that, the periodic variation of the brightness of the first display screen is detected, because the brightness of the positive frame and the brightness of the negative frame of the first display screen are different, and the positive frame and the negative frame are alternately changed, so that the brightness display of the first display screen has a certain period, and the time interval in one period is the sum of the positive frame and the negative frame. Therefore, the display period of the first display screen can be acquired by acquiring the screen refresh rate of the display panel. Specifically, the display period of the first display screen may be obtained according to the following formula:
wherein T is a display period of the first display screen, and f is a screen refresh rate of the display panel.
For example, in the case of a display panel with a screen refresh rate of 75 Hz, the time interval within one period is the sum of the positive and negative frames, and therefore, the display period of the first display screen of the display panel with a screen refresh rate of 75 Hz isI.e. the display period of the first display of the display panel with a screen refresh rate of 75 hz is 26ms.
Referring to fig. 4, fig. 4 is a third sub-flowchart of the method for compensating brightness of a display panel according to the embodiment of the present application, as shown in fig. 4, step 102 provided in the embodiment of the present application includes:
It should be noted that, although the gamma voltage correction is necessary, the area with low brightness of the first display screen, that is, the area displayed in the dark state is divided into more gray scales for display. But the original display brightness area of the first display picture cannot be influenced, namely the brightness minimum value of the first display picture and the brightness maximum value of the first display picture cannot be changed. Because the first display picture can realize a pure dark state, that is, the lowest first display picture can be 0, only the brightness value corresponding to the highest gray level of the first display picture, that is, the brightness highest value of the first display picture, is needed to be obtained.
It should be noted that, the brightness values corresponding to other gray scales may be calculated according to the following formula, so as to obtain the brightness values corresponding to the gray scales of the first display screen, and further, to implement correction on the gamma voltage of the first display screen.
Wherein l m For the brightness value corresponding to the highest gray level of the first display picture, l n For the brightness value corresponding to the n gray scales of the first display picture, l 0 And m is the highest gray level of the first display picture, n is an integer, and n is more than or equal to 0 and less than or equal to m.
Referring to fig. 5, fig. 5 is a fourth sub-flowchart of the method for correcting and compensating the gamma voltage of the display panel according to the embodiment of the present application. As shown in fig. 5, step 103 provided in the embodiment of the present application includes:
The second display screen has different gray levels. And compensating the gray scales of the second display picture by acquiring the compensation information one by one increases the compensation time of the second display picture. Therefore, the compensation information of the specific gray level can be obtained, and then the compensation information of other gray levels can be obtained according to the proportional relation between the specific gray level and other gray levels. Specifically, compensation information of a second display picture corresponding to the highest gray level, the middle gray level, the lowest gray level and the like is obtained, and then compensation information of other gray levels is obtained according to the proportional relation between the gray levels of the highest gray level, the middle gray level, the lowest gray level and the like and other gray levels.
Referring to fig. 6, fig. 6 is a fifth sub-flowchart of the method for correcting and compensating the gamma voltage of the display panel according to the embodiment of the present application. As shown in fig. 6, step 1031 provided in the embodiment of the present application includes:
The first brightness information of the central area of the second display screen is used as a reference to perform compensation, so that brightness of all areas of the second display screen can be guaranteed to be uniform to brightness of the central area, and uniformity of brightness compensation of the second display screen is good. The central area is the central area with the most serious mura phenomenon of the display panel, wherein the brightness of the second display picture tends to be consistent in the central area.
Referring to fig. 7, fig. 7 is a sixth sub-flowchart of the method for correcting and compensating the gamma voltage of the display panel according to the embodiment of the present application. As shown in fig. 7, step 1031 provided in an embodiment of the present application includes
When the brightness compensation is performed with the brightness of the central area as a reference, the brightness of the partial area is low, which results in a large compensation value and a phenomenon of excessively uneven gradation. The second display picture is divided into the first partition and a plurality of second partitions, and then compensation is performed, so that the phenomenon can be avoided, and the compensation effect of the second display picture is improved.
In the method for compensating the brightness of the display panel provided by the embodiment of the application, before brightness information required for gamma voltage correction and compensation is obtained, the stability of a display picture is judged. The embodiment of the application judges the stability of the display picture in advance, firstly, the acquired brightness information can be ensured to be accurate, and the compensation effect of the brightness of the subsequent display picture is not influenced; secondly, the waiting time before extracting the brightness information can be shortened, so that the whole time of brightness compensation of the display panel is shortened, and the display effect of the display panel is improved. In addition, the embodiment provided by the application carries out gamma voltage correction on the display panel, and then compensates the display panel, so that the brightness compensation effect of the display panel can be improved, and the display effect of the display panel can be improved.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a display panel brightness compensation apparatus according to an embodiment of the present disclosure. The correction compensation apparatus 20 for display panel gamma voltages provided in the embodiments of the present application includes a determination module 201, a correction module 202, an acquisition module 203, and a compensation module 204. Wherein, the liquid crystal display device comprises a liquid crystal display device,
the judging module 201 is configured to judge whether the first display screen is stable.
The correction module 202 is configured to correct the gamma voltage of the first display frame to obtain a second display frame if the first display frame is stable.
The obtaining module 203 is configured to obtain compensation information of the second display screen.
The compensation module 204 is configured to compensate the second display frame according to the compensation information of the second display frame.
The display panel luminance compensation apparatus 200 provided in the embodiment of the present application is used for the display panel luminance compensation method described in the above embodiment. The method for compensating the brightness of the display panel can be specifically referred to the above description of the method for compensating the brightness of the display panel, and will not be described herein.
In the display panel brightness compensation device provided in the embodiment of the present application, before brightness information required for gamma voltage correction and compensation is obtained, stability of a display screen is determined. The embodiment of the application judges the stability of the display picture in advance, firstly, the acquired brightness information can be ensured to be accurate, and the compensation effect of the brightness of the subsequent display picture is not influenced; secondly, the waiting time before extracting the brightness information can be shortened, so that the whole time of brightness compensation of the display panel is shortened, and the display effect of the display panel is improved. In addition, the embodiment provided by the application carries out gamma voltage correction on the display panel, and then compensates the display panel, so that the brightness compensation effect of the display panel can be improved, and the display effect of the display panel can be improved.
The embodiment of the application also provides a storage medium, and a program is stored in the storage medium, and when the program is executed, the compensation method for the brightness of the display panel is realized. The method for compensating the brightness of the display panel can be specifically referred to the above description of the method for compensating the brightness of the display panel, and will not be described herein.
The foregoing describes in detail a method for compensating brightness of a display panel, a device thereof and a storage medium thereof, and specific examples are applied to illustrate principles and implementations of the present application, and the description of the foregoing examples is only for helping to understand the method and core ideas of the present application; meanwhile, those skilled in the art will have modifications in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.
Claims (9)
1. A method for compensating brightness of a display panel, the method comprising:
judging whether the first display picture is stable or not;
if the first display picture is stable, correcting the gamma voltage of the first display picture to obtain a second display picture;
acquiring compensation information of the second display picture;
compensating the second display picture according to the compensation information of the second display picture; the specific step of judging whether the first display picture is stable comprises the following steps:
acquiring a display period of a first display picture;
detecting the first display picture to obtain brightness values of a plurality of continuous display periods of the first display picture;
judging whether the brightness value has an increasing trend or a decreasing trend;
if the brightness value does not have an increasing trend or a decreasing trend, the first display picture is stable.
2. The method for compensating brightness of display panel according to claim 1, wherein the specific step of obtaining the display period of the first display screen comprises:
acquiring a screen refresh rate of the display panel;
and acquiring the display period of the first display picture according to the screen refresh rate of the display panel.
3. The method of claim 1, wherein the correcting the gamma voltage of the first display screen comprises:
acquiring a brightness value corresponding to the highest gray level of the first display picture;
correcting the brightness value corresponding to each gray level of the first display picture according to a preset formula and the brightness value corresponding to the highest gray level of the first display picture.
4. The method of claim 3, wherein the predetermined formula is thatWherein l m For the brightness value corresponding to the highest gray level of the first display picture, l n For the brightness value l corresponding to the n gray scales of the first display picture 0 And m is the highest gray level of the first display picture, n is an integer, and n is more than or equal to 0 and less than or equal to m.
5. The method for compensating brightness of display panel according to claim 1, wherein the specific step of obtaining the compensation information of the second display screen comprises:
acquiring compensation information of specific gray scale of the second display picture;
and calculating compensation information of other gray scales according to the proportional relation between the specific gray scale and the other gray scales by taking the compensation information of the specific gray scale of the second display picture as a reference.
6. The method for compensating brightness of display panel according to claim 1, wherein the specific step of obtaining the compensation information of the specific gray scale of the second display screen comprises:
acquiring first brightness information of a central area of the second display picture and second brightness information of other areas of the second display picture under a specific gray level;
and obtaining a difference value between the first brightness information and the second brightness information, wherein the difference value is the compensation information of the second display picture.
7. The method for compensating brightness of display panel according to claim 1, wherein the specific step of obtaining the compensation information of the specific gray scale of the second display screen comprises:
dividing the second display picture into a first partition and a plurality of second partitions;
acquiring a first brightness average value of the first partition and a second brightness average value of the second partition under a specific gray level;
and obtaining a difference value of the first brightness average value and the second brightness average value, wherein the difference value is the compensation information of the second display picture.
8. A compensation apparatus for display panel brightness, comprising:
the judging module is used for judging whether the first display picture is stable or not;
the correction module is used for correcting the gamma voltage of the first display picture if the first display picture is stable so as to acquire a second display picture;
the acquisition module is used for acquiring the compensation information of the second display picture;
the compensation module is used for compensating the display picture according to the compensation information of the second display picture;
the judging module acquires brightness values of a plurality of continuous display periods of the first display picture by acquiring the display period of the first display picture and detecting the first display picture; and judging whether the brightness value has an increasing trend or a decreasing trend or not, so as to judge that the first display picture is stable when the brightness value does not have the increasing trend or the decreasing trend.
9. A storage medium, characterized in that the storage medium has stored therein a program which, when executed, implements the compensation method of display panel luminance according to any one of claims 1 to 7.
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