CN111816121B - Display panel brightness compensation method and system and display panel - Google Patents

Display panel brightness compensation method and system and display panel Download PDF

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CN111816121B
CN111816121B CN202010647777.2A CN202010647777A CN111816121B CN 111816121 B CN111816121 B CN 111816121B CN 202010647777 A CN202010647777 A CN 202010647777A CN 111816121 B CN111816121 B CN 111816121B
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compensation
compensated
brightness
area
region
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CN111816121A (en
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彭春生
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Hefei Visionox Technology Co Ltd
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Hefei Visionox 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Abstract

The embodiment of the invention relates to the technical field of image display, and discloses a brightness compensation method and a system of a display panel and the display panel, wherein the brightness compensation method comprises the following steps: acquiring a region to be compensated of a display panel; calculating a compensation gray-scale value of the to-be-compensated region, and performing first brightness compensation on the to-be-compensated region according to the compensation gray-scale value and a preset initial compensation gain coefficient; judging whether the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement, and when judging that the display effect does not meet the preset requirement, performing first brightness adjustment on the to-be-compensated area: adjusting an initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and a preset requirement to obtain a first compensation gain coefficient; and performing second brightness compensation on the region to be compensated according to the compensation gray-scale value and the first compensation gain coefficient. The brightness compensation method, the brightness compensation system and the display panel can improve the display effect of the picture and realize the uniformity of the picture display of the image.

Description

Display panel brightness compensation method and system and display panel
Technical Field
The embodiment of the invention relates to the technical field of image display, in particular to a brightness compensation method and system of a display panel and the display panel.
Background
An OLED (Organic Light-Emitting Diode) is called an Organic electroluminescent Diode. The OLED display technology has many advantages, such as full solid state, active light emission, high contrast, ultra-thin, low power consumption, fast effect speed, wide working range, and easy implementation of flexible display and 3D display, and is currently applied to many display devices, for example, televisions and mobile devices. The current OLED display device also has a problem of display non-uniformity in luminance, which is mainly caused by non-uniformity of electrical properties of Thin Film Transistors (TFTs) in the back plate and power supply voltage Drop (IR Drop) generated when image driving is implemented.
The method for improving the non-uniformity of the display brightness of the OLED display device in the prior art needs to be improved, and therefore, a new method for adjusting the image display is needed to solve the above problems.
Disclosure of Invention
An object of embodiments of the present invention is to provide a method and a system for compensating brightness of a display panel, and a display panel, which can achieve uniformity of image screen display.
In order to solve the above technical problem, an embodiment of the present invention provides a method for compensating luminance of a display panel, including:
acquiring a region to be compensated of a display panel; calculating a compensation gray-scale value of the region to be compensated, and performing first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient; judging whether the display effect of the to-be-compensated area after the first brightness compensation meets a preset requirement or not, and performing first brightness adjustment on the to-be-compensated area when the preset requirement is judged not to be met, wherein the first brightness adjustment specifically comprises the following steps: adjusting the initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and the preset requirement to obtain a first compensation gain coefficient; and performing second brightness compensation on the area to be compensated according to the compensation gray-scale value and the first compensation gain coefficient.
In addition, after performing a second brightness compensation on the region to be compensated according to the compensation gray-scale value and the first compensation gain coefficient, the method further includes: and judging whether the display effect of the to-be-compensated area after the second brightness compensation meets a preset requirement, when the display effect of the to-be-compensated area after the second brightness compensation does not meet the preset requirement, taking the first compensation gain coefficient as the initial compensation gain coefficient, and then executing the step of adjusting the first brightness until the display effect of the to-be-compensated area is within the preset requirement. In this way, the uniformity of the image display of the display panel can be further improved.
In addition, after performing a second brightness compensation on the region to be compensated according to the compensation gray-scale value and the first compensation gain coefficient, the method further includes: judging whether the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement or not, and performing second brightness adjustment on the to-be-compensated area when the preset requirement is judged not to be met, wherein the second brightness adjustment specifically comprises the following steps: judging whether a sub-area exists in the area to be compensated, wherein the display effect of the sub-area meets a preset requirement, and the size of the sub-area is in a preset proportion to the size of the area to be compensated; when the sub-area does not exist, executing the first brightness adjustment step until the sub-area exists, wherein the display effect meets the preset requirement, and the area range of the sub-area is in a preset proportion with the area range of the area to be compensated; when the sub-region is judged to exist, adjusting the first compensation gain coefficient according to the difference between the display effect of the current remaining region and the preset requirement to obtain a second compensation gain coefficient, wherein the sub-region and the remaining region jointly form the region to be compensated; and performing third brightness compensation on the residual region according to the compensation gray-scale value and the second compensation gain coefficient. By the method, the effect of the second-time brightness compensation is better than that of the first-time brightness compensation, the reliability of the brightness compensation method is further improved, and the uniformity of image display is realized.
In addition, after determining that the sub-region does not exist, the method further includes: acquiring the total times of brightness compensation of the display panel; judging whether the total times is less than a first preset time, and executing the first brightness adjustment when the total times is less than the first preset time; and when the judgment result is greater than or equal to the first preset times, recording all compensation gain coefficients and the compensation gray-scale value for compensating the to-be-compensated area. In this way, the problem that the compensation efficiency of the wire becomes low due to excessive times of compensation on the compensation area is avoided.
In addition, after performing a third luminance compensation on the residual region according to the compensation gray-scale value and the second compensation gain coefficient, the method further includes: and judging whether the display effect of the residual area after the third brightness compensation meets the preset requirement, and when the display effect of the residual area after the third brightness compensation does not meet the preset requirement, taking the residual area after the third brightness compensation as the area to be compensated, and executing the step of adjusting the second brightness until the display effect of the current residual area meets the preset requirement. In this way, the uniformity of the image display of the display panel can be further improved.
In addition, after the determination that the display effect of the residual region after the third brightness compensation does not meet the preset requirement, the method further includes: acquiring the total times of brightness compensation of the display panel; judging whether the total times is less than a second preset time, and executing the second brightness adjustment when the total times is less than the second preset time; and when the judgment result is greater than or equal to the second preset times, recording all compensation gain coefficients and the compensation gray-scale value for compensating the to-be-compensated area. In this way, the problem that the compensation efficiency of the wire becomes low due to excessive times of compensation on the compensation area is avoided.
In addition, the acquiring a region to be compensated of the display panel includes: acquiring a region to be compensated of the display panel under a plurality of different gray scales; the calculating the compensation gray-scale value of the region to be compensated and performing the first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient includes: and calculating a plurality of compensation gray scale values of the to-be-compensated region under a plurality of different gray scales, and performing first brightness compensation on the to-be-compensated region corresponding to the compensation gray scale values according to the compensation gray scale values and a preset initial compensation gain coefficient, wherein one compensation gray scale value corresponds to the to-be-compensated region under one gray scale.
In addition, the determining whether the display effect of the to-be-compensated region after the first brightness compensation meets the preset requirement includes: judging whether the difference between the brightness mean value of the to-be-compensated area after the first brightness compensation and a normal brightness value meets a preset requirement, wherein the normal brightness value is the brightness mean value of a non-to-be-compensated area in a preset range outside the to-be-compensated area; judging whether the difference between the brightness mean value and the normal brightness value meets a preset requirement or not according to the following formula: L-La 1/La 1 is less than or equal to e; and when | L-La1|/La1 is not more than e, the difference between the brightness mean value and the normal brightness value meets a preset requirement.
Embodiments of the present invention also provide a brightness compensation system, including: the device comprises a shooting device, a calculating device, a judging device and a processing device; the shooting device is used for shooting a display picture of the display panel, and the processing device is used for determining a region to be compensated of the display panel according to the display picture; the computing device is used for computing a compensation gray-scale value of the area to be compensated, and the processing device is also used for performing first brightness compensation on the area to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient; the judging device is used for judging whether the display effect of the to-be-compensated area after the first brightness compensation meets a preset requirement or not, and the processing device is further used for adjusting the initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and the preset requirement when the judging device judges that the display effect of the to-be-compensated area does not meet the preset requirement, so that a first compensation gain coefficient is obtained, and second brightness compensation is performed on the to-be-compensated area according to the compensation gray-scale value and the first compensation gain coefficient.
It should be understood that this embodiment is an example of the apparatus corresponding to the first embodiment, and may be implemented in cooperation with the first embodiment. The related technical details mentioned in the first embodiment are still valid in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment.
The embodiment of the invention also provides a display panel, which comprises a screen body and at least one processor arranged in the screen body; and a memory communicatively coupled to the at least one processor; the memory is used for storing a compensation gray-scale value and a first compensation gain coefficient, the compensation gray-scale value is obtained according to a to-be-compensated area of the display panel, and the first compensation gain coefficient is obtained by adjusting an initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and a preset requirement; and the processor is used for performing brightness compensation on the area to be compensated according to the compensation gray-scale value and the first compensation gain coefficient stored in the memory.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
the primary brightness compensation of the area to be compensated is realized by calculating the compensation gray-scale value of the area to be compensated and carrying out the first brightness compensation on the area to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient; the compensation effect after the first brightness compensation is quantified and confirmed (namely whether the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement is judged), and the brightness compensation is carried out on the to-be-compensated area again when the display effect does not meet the preset requirement, so that the reliability of the brightness compensation method is improved in a multi-time compensation mode; in addition, the second brightness compensation mode is to adjust the initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and the preset requirement to obtain the first compensation gain coefficient, and then perform the second brightness compensation on the to-be-compensated area according to the compensation gray-scale value and the first compensation gain coefficient, so that the effect of the second brightness compensation is better than that of the first brightness compensation, the reliability of the brightness compensation method is further improved, and the uniformity of image picture display is realized.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a flowchart of a brightness compensation method of a display panel according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating a brightness compensation method for a display panel according to a second embodiment of the present invention;
FIG. 3 is a flowchart of a brightness compensation method for a display panel according to a third embodiment of the present invention;
FIG. 4 is a flowchart of a brightness compensation method for a display panel according to a fourth embodiment of the present invention;
fig. 5 is a flowchart of a brightness compensation method of a display panel according to a fifth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a brightness compensation system according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display panel according to a seventh embodiment of the present invention.
Detailed Description
In order to solve the display non-uniformity problem of the OLED display device in terms of brightness, an image display control technique is generally adopted to improve image driving. The image display control method includes internal compensation and external compensation. The internal compensation refers to a method of compensating inside the sub-pixel using a sub-circuit constructed with TFTs. The external compensation is a method of extracting TFT and OLED signals to the outside of the backplane and then performing image display control through an external application integrated circuit (ASIC circuit). Generally, the structure and driving method of the internally compensated sub-pixel are complex, and in a display device with large size, high resolution and high refresh rate, the internally compensated method causes the problems of reduced aperture ratio and slow driving speed. The external compensation mode has the advantages of simple sub-pixel structure, high driving speed and good compensation effect, so that the external compensation is a better compensation scheme in large-size OLED display.
The external compensation is divided into optical extraction compensation and electrical extraction compensation. The optical extraction type is to extract a brightness signal by an optical CCD photographing method after the panel is lightened, and the electrical extraction type is to extract electrical signals of the TFT and the OLED by an induction circuit of a driving chip. The two methods extract different kinds of signals, and thus the data processing modes are different. The optical extraction method has the advantages of simple structure and flexible method, and is widely adopted at present.
The existing method for optically compensating image brightness is to collect R/G/B monochromatic brightness data through a CCD camera and then optically extract through a software algorithm, so that the effect of eliminating uneven brightness of a display picture can be achieved, but because optical compensation is only carried out once, the display picture still has partial area display defects after compensation, and the display effect of a module is influenced.
Therefore, an embodiment of the present invention provides a brightness compensation method for a display panel, which includes performing a first brightness compensation on a to-be-compensated region of the display panel, performing a first brightness adjustment on the to-be-compensated region when a display effect of the to-be-compensated region after the first brightness compensation does not meet a preset requirement, and performing the brightness adjustment based on a difference between the display effect of the to-be-compensated region after the first brightness compensation and the preset requirement. The invention can realize the uniformity of image display.
It is to be understood that the display panel for performing brightness compensation in this embodiment may be an LED, an LCD, or the like, besides an OLED, that is, the present embodiment does not specifically limit the type of the display panel, and other types of display panels may perform brightness compensation by using the method provided in this embodiment.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a method for compensating brightness of a display panel, and a specific flow is shown in fig. 1, which includes:
s101: and acquiring a region to be compensated of the display panel.
Specifically, the embodiment can acquire the display screen of the display panel as follows: and (3) righting the display panel, adjusting a camera right above the display panel to ensure the focusing of the camera, putting the display panel into a darkroom, and then taking a picture to obtain the image data of the display panel. And determining the area (namely the area to be compensated) where the mura is located in the display picture by adopting an image contour detection algorithm. It is to be understood that the present embodiment does not specifically limit the type of the contour algorithm, and an appropriate contour detection algorithm may be selected according to actual requirements.
It should be noted that, the acquiring of the region to be compensated of the display panel in the embodiment includes: acquiring areas to be compensated of a display panel under a plurality of different gray scales; in the subsequent steps, a compensation gray-scale value of the region to be compensated is calculated, and first brightness compensation is performed on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient, wherein the method comprises the following steps: and calculating a plurality of compensation gray scale values of the to-be-compensated region under a plurality of different gray scales, and performing first brightness compensation on the to-be-compensated region corresponding to the compensation gray scale values according to the compensation gray scale values and a preset initial compensation gain coefficient, wherein one compensation gray scale value corresponds to the to-be-compensated region under one gray scale. Specifically, as the display panel generally shows an image with a point composed of three sub-pixels of red, green and blue, the light source behind each sub-pixel can display different brightness levels, the gray scale represents different levels of brightness from the lightest level to the darkest level, and the more levels, the more the displayed image effect is finer. For example, 256 luminance levels are referred to as 256 gray levels, and the color change of each dot on the image represents the change of gray levels of three sub-pixels constituting the dot. The brightness adjustment can be carried out on the different gray scales of the area to be compensated by acquiring the area to be compensated of the display panel under the different gray scales, so that the phenomenon of uneven brightness does not occur on the display picture of each gray scale of the display panel, and the uniformity of image picture display is further realized.
Preferably, the obtaining of the region to be compensated of the display panel in this embodiment may be: and acquiring a region to be compensated of the display panel at the equal gray scale interval. By the method, the area to be compensated of the display panel under each gray scale does not need to be obtained, and the workload of obtaining the area to be compensated and subsequently calculating the compensation gray scale value is reduced under the condition of ensuring the uniformity of image picture display, so that the brightness compensation method provided by the embodiment is simpler. It is understood that the obtaining method of the to-be-compensated region in this embodiment is not limited to obtaining the to-be-compensated region with equal gray scale intervals, and can also obtain the to-be-compensated region with unequal gray scale intervals (for example, obtaining the to-be-compensated regions with 2 nd, 40 th, 80 th, 150 th, and 224 th gray scales in 256 gray scales), and the same technical effect can be achieved.
Preferably, the acquiring of the region to be compensated of the display panel at the equal gray scale interval specifically includes: acquiring the area to be compensated of the display panel at 32 th, 64 th, 96 th, 128 th, 160 th, 192 th and 224 th gray levels in 256 gray levels. That is to say, the display panel with 32 th to 224 th gray levels in the 256 gray levels is subjected to the acquisition of the region to be compensated with the equal gray level intervals, and by this way, the workload of acquiring the region to be compensated and subsequently calculating the compensation gray level value is further reduced, so that the brightness compensation method provided by the embodiment is simpler. It is understood that the obtaining of the compensated regions of the 32 th to 224 th gray levels is only an exemplary manner, and the same technical effects can be achieved by obtaining the compensated regions of the 30 th to 220 th gray levels, for example, and the embodiment is not limited thereto.
It should be noted that, in the embodiment, the number of the regions to be compensated of the display panel may be multiple, and when there are multiple regions to be compensated, the brightness compensation may be performed on the multiple regions to be compensated at the same time, so as to save the time of the brightness compensation method, thereby further improving the efficiency of the brightness compensation method of this embodiment.
S102: and calculating a compensation gray-scale value of the region to be compensated, and performing first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient.
Specifically, the compensation gray scale value of the region to be compensated can be calculated in the following manner: and carrying out pixel acquisition on the area to be compensated to obtain the brightness data of the pixels in the area to be compensated, and converting the difference value of the brightness data and the normal brightness data into a gray-scale value, namely the compensation gray-scale value. Taking the acquired area to be compensated under the 32 gray scale of the display panel as an example, when the display panel displays a 32 gray scale picture, the actual brightness of the area to be compensated is not the brightness of the normal area of the 32 gray scale, and if the current brightness approximately corresponds to the brightness of the 25 gray scale, the compensation gray scale value needs to be set to 7, so as to increase the brightness of the current area to be compensated.
It should be noted that, in the embodiment, the initial compensation gain coefficient is usually 1, that is, the gray-scale value corresponding to the luminance of the region to be compensated is 25, and then the compensation gray-scale value is 7 multiplied by the initial compensation gain coefficient 1 and added to the region to be compensated, so as to perform the first luminance compensation on the region to be compensated. It is to be understood that, in this embodiment, the magnitude of the initial compensation gain coefficient is not particularly limited, and the initial compensation gain coefficients with different magnitudes may be set according to actual requirements.
S103: judging whether the display effect of the to-be-compensated area after the first brightness compensation meets a preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement; when it is determined that the preset requirement is not satisfied, step S104 is executed.
Specifically, the embodiment can determine whether the display effect of the to-be-compensated region after the first brightness compensation meets the preset requirement by: judging whether the difference between the brightness mean value of the to-be-compensated area after the first brightness compensation and a normal brightness value meets a preset requirement, wherein the normal brightness value is the brightness mean value of a non-to-be-compensated area in a preset range outside the to-be-compensated area; judging whether the difference between the brightness mean value and the normal brightness value meets a preset requirement or not according to the following formula: L-La 1/La 1 is less than or equal to e; and when | L-La1|/La1 is not more than e, the difference between the brightness mean value and the normal brightness value meets a preset requirement. It should be noted that, the size of e is not specifically limited in this embodiment, and may be 5%, 8%, 10%, or the like, and may be set according to actual requirements, and when | L-La1|/La1 ≦ e, it is considered that the region to be compensated is difficult to be distinguished from the normal region, that is, it is not necessary to perform brightness compensation any more.
It should be noted that, in addition to determining whether the display effect of the to-be-compensated region after the first brightness compensation meets the preset requirement in the above manner, the brightness variance of the to-be-compensated region after the first brightness compensation may be obtained and compared with the variance of the normal brightness, and then it is determined whether the difference between the brightness corresponding to the point where the data in the to-be-compensated region deviates from the average value of the normal region to the maximum and the normal brightness value meets the preset requirement: L-La 1/La 1 is less than or equal to e; and when | L-La1|/La1 is not more than e, the difference between the brightness corresponding to the point where the data in the area to be compensated deviates from the average value of the normal area and the normal brightness meets the preset requirement.
It is understood that, in this embodiment, the size of the preset range (i.e., the size of the non-to-be-compensated region) is not particularly limited, and the non-to-be-compensated region with a suitable size may be selected according to actual requirements, so as to obtain the normal brightness value La 1.
S104: and adjusting the initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and the preset requirement to obtain a first compensation gain coefficient.
Specifically, assuming that the luminance of a certain pixel point in the to-be-compensated region after the first luminance compensation is L1, the pixel point is a point where the deviation between the luminance and the normal luminance is the largest, and the luminance mean value of the non-to-be-compensated region is La1, in this embodiment, adjusting the initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated region and the preset requirement may be: and adjusting the initial compensation gain coefficient according to the difference between L1 and La1 to obtain a first compensation gain coefficient.
For ease of understanding, how the first compensation gain factor is obtained in the present embodiment is illustrated below:
when L1 ═ La1-e × La1, it indicates that the luminance of the region to be compensated is still dark after the first luminance compensation, at this time, the initial compensation gain coefficient is increased, for example, the initial compensation gain coefficient is 1, and may be increased to 1.5, where 1.5 is the first compensation gain coefficient; when L1> -La 1+ e La1, it indicates that the luminance of the region to be compensated after the first luminance compensation is brighter, and at this time, the initial compensation gain coefficient is decreased, for example, the initial compensation gain coefficient is 1, and may be decreased to 0.8, where 0.8 is the first compensation gain coefficient.
It should be noted that, in the embodiment, when compensating the regions to be compensated under different gray scales, the scaling factors of the compensation gain coefficients are different, so as to improve the efficiency of the brightness compensation method, and for understanding, the following specific examples are given to how to compensate the regions to be compensated under different gray scales:
assuming that when 16 grays are compensated, the gray scale to be compensated in the region to be compensated is 3, and the compensation gain coefficient is 1.1, 3 × 1.1 equals 3.3, but there is no 3.3 gray scale in reality, so the gain is set to 1.4 at low grays, 3 × 1.4 equals 4.2, and the approximate value is 4 at the time of compensation, so that the gain scaling factor of each time can be set to be larger when compensating the low grays; when the 200 gray scales are compensated, the gray scale to be compensated in the region to be compensated is 10, and compensation is performed according to the compensation gain coefficient of 1.1, 10 × 1.1 equals 11, compensation is performed according to the compensation gain coefficient of 1.4, 10 × 1.4 equals 14, and the difference between 10 and 14 is relatively large, so that when the high gray scales are compensated, the gain scaling factor of each time can be set to be relatively small.
S105: and performing second brightness compensation on the region to be compensated according to the compensation gray-scale value and the first compensation gain coefficient.
Specifically, the compensation gray-scale value is multiplied by a first compensation gain coefficient, and then the calculation result is added into the region to be compensated so as to perform second brightness compensation on the region to be compensated.
Compared with the prior art, the embodiment of the invention realizes the primary brightness compensation of the area to be compensated by calculating the compensation gray-scale value of the area to be compensated and carrying out the first brightness compensation on the area to be compensated according to the compensation gray-scale value and the preset initial compensation gain coefficient; the compensation effect after the first brightness compensation is quantified and confirmed (namely whether the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement is judged), and the brightness compensation is carried out on the to-be-compensated area again when the display effect does not meet the preset requirement, so that the reliability of the brightness compensation method is improved in a multi-time compensation mode; in addition, the second brightness compensation mode is to adjust the initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and the preset requirement to obtain the first compensation gain coefficient, and then perform the second brightness compensation on the to-be-compensated area according to the compensation gray-scale value and the first compensation gain coefficient, so that the effect of the second brightness compensation is better than that of the first brightness compensation, the reliability of the brightness compensation method is further improved, and the uniformity of image picture display is realized.
A second embodiment of the present invention relates to a method for compensating luminance of a display panel, and the second embodiment is a further improvement on the first embodiment, and the specific improvement is that: in a second embodiment, it is determined whether the display effect of the to-be-compensated region after the second luminance compensation meets a preset requirement, and when it is determined that the preset requirement is not met, the first compensation gain coefficient is used as the initial compensation gain coefficient, and then the step of adjusting the first luminance is performed until the display effect of the to-be-compensated region is within the preset requirement. In this way, the uniformity of the image display of the display panel can be further improved.
As shown in fig. 2, a specific flow of the present embodiment includes:
s201: and acquiring a region to be compensated of the display panel.
S202: and calculating a compensation gray-scale value of the region to be compensated, and performing first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient.
S203: judging whether the display effect of the to-be-compensated area after the first brightness compensation meets a preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement; when it is determined that the preset requirement is not satisfied, step S204 is executed.
S204: and adjusting the initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and the preset requirement to obtain a first compensation gain coefficient.
S205: and performing second brightness compensation on the region to be compensated according to the compensation gray-scale value and the first compensation gain coefficient.
Steps S201 to S205 of this embodiment are similar to steps S101 to S105 of the first embodiment, and are not repeated herein to avoid repetition.
S206: judging whether the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement; and when the first compensation gain coefficient is judged not to meet the preset requirement, the first compensation gain coefficient is taken as an initial compensation gain coefficient, and the step S204 is executed.
Specifically, the manner of determining whether the display effect of the to-be-compensated region after the second brightness compensation meets the preset requirement in the embodiment may be similar to that of the first embodiment, that is, the brightness variance of the to-be-compensated region after the second brightness compensation is obtained and compared with the variance of the normal brightness, and then it is determined whether the difference between the brightness corresponding to the point with the largest deviation in the to-be-compensated region and the normal brightness value meets the preset requirement.
For easy understanding, the following specifically exemplifies how the brightness compensation is performed on the region to be compensated according to the present embodiment:
assuming that the brightness of a certain pixel point in the to-be-compensated area after the first brightness compensation is L1, the pixel point is a point with the maximum deviation between the brightness and the normal brightness, the average brightness value of the non-to-be-compensated area is La1, and assuming that L1< ═ La1-e × La1, it indicates that the brightness of the to-be-compensated area after the first brightness compensation is dark, at this time, the initial compensation gain coefficient is increased, if the initial compensation gain coefficient is 1, the initial compensation gain coefficient can be increased to 1.5, 1.5 is the first compensation gain coefficient, and the second brightness compensation is performed on the to-be-compensated area according to the first compensation gain coefficient and the compensation gray-scale value; assuming that the brightness of a certain pixel point in the to-be-compensated region after the second brightness compensation is L2, the pixel point is a point at which the deviation between the brightness and the normal brightness is maximum, the average brightness of the non-to-be-compensated region is La2, and assuming that L2< ═ La2-e × La2, it indicates that the brightness of the to-be-compensated region after the second brightness compensation is still dark, at this time, the first compensation gain coefficient is increased, and if the first compensation gain coefficient 1.5 can be increased to 1.8, 1.8 is the second compensation gain coefficient.
Compared with the prior art, the embodiment of the invention realizes the primary brightness compensation of the area to be compensated by calculating the compensation gray-scale value of the area to be compensated and carrying out the first brightness compensation on the area to be compensated according to the compensation gray-scale value and the preset initial compensation gain coefficient; the compensation effect after the first brightness compensation is quantified and confirmed (namely whether the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement is judged), and the brightness compensation is carried out on the to-be-compensated area again when the display effect does not meet the preset requirement, so that the reliability of the brightness compensation method is improved in a multi-time compensation mode; in addition, the second brightness compensation mode is to adjust the initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and the preset requirement to obtain the first compensation gain coefficient, and then perform the second brightness compensation on the to-be-compensated area according to the compensation gray-scale value and the first compensation gain coefficient, so that the effect of the second brightness compensation is better than that of the first brightness compensation, the reliability of the brightness compensation method is further improved, and the uniformity of image picture display is realized.
A third embodiment of the present invention relates to a method for compensating luminance of a display panel, and is further improved based on the second embodiment, and the third embodiment is specifically improved in that: in the third embodiment, when it is determined that the display effect of the to-be-compensated region after the second brightness compensation does not meet the preset requirement, the brightness adjustment is not performed on the sub-region of the to-be-compensated region where the display effect meets the preset requirement, and the brightness adjustment is performed on the remaining region of the to-be-compensated region where the display effect does not meet the preset requirement, so that the stepped brightness compensation is realized, and the uniformity of the display image of the display panel is ensured while the efficiency of the brightness compensation method of the display panel is improved.
As shown in fig. 3, a specific flow of the present embodiment includes:
s301: and acquiring a region to be compensated of the display panel.
S302: and calculating a compensation gray-scale value of the region to be compensated, and performing first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient.
S303: judging whether the display effect of the to-be-compensated area after the first brightness compensation meets a preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement; when it is determined that the preset requirement is not satisfied, step S304 is executed.
S304: and adjusting the initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and the preset requirement to obtain a first compensation gain coefficient.
S305: and performing second brightness compensation on the region to be compensated according to the compensation gray-scale value and the first compensation gain coefficient.
S306: judging whether the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement; when it is determined that the preset requirement is not satisfied, step S307 is executed.
Steps S301 to S306 of this embodiment are similar to steps S201 to S206 of the first embodiment, and are not repeated herein to avoid redundancy.
S307: judging whether a sub-region with a display effect meeting a preset requirement and the size being in a preset proportion with the size of the region to be compensated exists in the region to be compensated, if so, taking the first compensation gain coefficient as an initial compensation gain coefficient, and executing the step S304; when it is determined to be present, step S308 is executed.
Specifically, the size of the preset proportion is not specifically limited in this embodiment, and may be set according to actual requirements. Taking the preset proportion as 50% as an example, assuming that the brightness mean value of the non-to-be-compensated region is La1 (i.e., a normal brightness value), the region S1_1 exists in the to-be-compensated region S1 after the second brightness compensation, the brightness mean value L of the region S1_1 satisfies | L-La1|/La1 ≦ e, and the proportion of the size of the region S1_1 to the size of the to-be-compensated region S1 is greater than or equal to 0.5, it is determined that the sub-region exists.
S308: and adjusting the first compensation gain coefficient according to the difference between the display effect of the current residual area and the preset requirement to obtain a second compensation gain coefficient.
S309: and performing third brightness compensation on the residual region according to the compensation gray-scale value and the second compensation gain coefficient.
Regarding step S308 to step S309, specifically, assume that the luminance of a certain pixel in the current remaining region is L1, the pixel is the point with the maximum deviation between the luminance and the normal luminance, the average luminance of the non-to-be-compensated region is La1, and further assume that L1 ═ La1-e × La1, which indicates that the luminance of the remaining region is dark, at this time, the first compensation gain coefficient is increased, and if the first compensation gain coefficient is 1.5, it may be increased to 1.8, where 1.8 is the second compensation gain coefficient, and the third luminance compensation is performed on the to-be-compensated region according to the second compensation gain coefficient and the compensation gray-scale value.
It can be understood that, by the above manner, brightness adjustment can be performed on the sub-area, in the area to be compensated, of which the display effect meets the preset requirement, but brightness adjustment is performed on the remaining area, in the area to be compensated, of which the display effect does not meet the preset requirement, so that area-stepped brightness compensation is realized, and uniformity of images displayed by the display panel is ensured while efficiency of the brightness compensation method of the display panel is improved.
Compared with the prior art, the embodiment of the invention realizes the primary brightness compensation of the area to be compensated by calculating the compensation gray-scale value of the area to be compensated and carrying out the first brightness compensation on the area to be compensated according to the compensation gray-scale value and the preset initial compensation gain coefficient; the compensation effect after the first brightness compensation is quantified and confirmed (namely whether the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement is judged), and the brightness compensation is carried out on the to-be-compensated area again when the display effect does not meet the preset requirement, so that the reliability of the brightness compensation method is improved in a multi-time compensation mode; in addition, the second brightness compensation mode is to adjust the initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and the preset requirement to obtain the first compensation gain coefficient, and then perform the second brightness compensation on the to-be-compensated area according to the compensation gray-scale value and the first compensation gain coefficient, so that the effect of the second brightness compensation is better than that of the first brightness compensation, the reliability of the brightness compensation method is further improved, and the uniformity of image picture display is realized.
A fourth embodiment of the present invention relates to a method for compensating luminance of a display panel, and is a further improvement on the second embodiment, and the specific improvement is that: in a fourth embodiment, after determining that the sub-region is not present, the method further includes: acquiring the total times of brightness compensation of the display panel; judging whether the total times is less than a first preset time, and executing the first brightness adjustment when the total times is less than the first preset time; and when the judgment result is greater than or equal to the first preset times, recording a compensation gain coefficient and the compensation gray-scale value for compensating the to-be-compensated area for the last time. In this way, the problem that the compensation efficiency of the wire becomes low due to excessive times of compensation on the compensation area is avoided.
As shown in fig. 4, a specific flow of the present embodiment includes:
s401: and acquiring a region to be compensated of the display panel.
S402: and calculating a compensation gray-scale value of the region to be compensated, and performing first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient.
S403: judging whether the display effect of the to-be-compensated area after the first brightness compensation meets a preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement; when it is determined that the preset requirement is not satisfied, step S404 is executed.
S404: and adjusting the initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and the preset requirement to obtain a first compensation gain coefficient.
S405: and performing second brightness compensation on the region to be compensated according to the compensation gray-scale value and the first compensation gain coefficient.
S406: judging whether the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement; when it is determined that the preset requirement is not satisfied, step S407 is executed.
S407: judging whether a sub-area exists in the area to be compensated, wherein the display effect meets the preset requirement, and the size of the sub-area is in a preset proportion to the size of the area to be compensated, and executing the step S408 when judging that the sub-area does not exist; when it is determined to be present, step S411 is executed.
S408: and acquiring the total times of brightness compensation of the display panel.
Specifically, in the embodiment, each time the brightness compensation is performed on the to-be-compensated region, the compensation times are recorded once, and the total brightness compensation times of the display panel are the total brightness compensation times performed on the to-be-compensated region of the display panel in the foregoing step.
S409: judging whether the total times is less than a first preset time, and executing the step S404 when the total times is less than the first preset time; when it is determined to be greater than or equal to the first preset number of times, step S410 is performed.
Specifically, the size of the first preset number of times is not specifically limited, and the first preset number of times can be set according to actual requirements, so that the influence on the brightness compensation efficiency of the display panel due to too many compensation times can be avoided.
S410: and recording all compensation gain coefficients and compensation gray-scale values for compensating the area to be compensated.
Specifically, after the compensation of the region to be compensated is completed, all compensation gain coefficients (in this embodiment, the first compensation gain coefficient) for compensating the region to be compensated are stored.
It should be noted that, if the display panel has a plurality of regions to be compensated, the physical position of the region to be compensated corresponding to the compensation gain coefficient in the display screen of the display panel is recorded while recording the compensation gain coefficient of each region to be compensated.
It should be noted that the embodiment may further record the second compensation gain coefficient in the subsequent step, so that the data in the database is more complete, and a more reliable reference value is provided for the subsequent brightness compensation of other display panels.
S411: and adjusting the first compensation gain coefficient according to the difference between the display effect of the current residual area and the preset requirement to obtain a second compensation gain coefficient.
S412: and performing third brightness compensation on the residual region according to the compensation gray-scale value and the second compensation gain coefficient.
Compared with the prior art, the embodiment of the invention realizes the primary brightness compensation of the area to be compensated by calculating the compensation gray-scale value of the area to be compensated and carrying out the first brightness compensation on the area to be compensated according to the compensation gray-scale value and the preset initial compensation gain coefficient; the compensation effect after the first brightness compensation is quantified and confirmed (namely whether the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement is judged), and the brightness compensation is carried out on the to-be-compensated area again when the display effect does not meet the preset requirement, so that the reliability of the brightness compensation method is improved in a multi-time compensation mode; in addition, the second brightness compensation mode is to adjust the initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and the preset requirement to obtain the first compensation gain coefficient, and then perform the second brightness compensation on the to-be-compensated area according to the compensation gray-scale value and the first compensation gain coefficient, so that the effect of the second brightness compensation is better than that of the first brightness compensation, the reliability of the brightness compensation method is further improved, and the uniformity of image picture display is realized.
A fifth embodiment of the present invention relates to a method for compensating luminance of a display panel, and is further improved based on the third embodiment, and the fifth embodiment is specifically improved in that: in a fifth embodiment, it is further determined whether the display effect of the remaining region after the third brightness compensation meets the preset requirement, and when it is determined that the preset requirement is not met, the remaining region after the third brightness compensation is used as the region to be compensated, and the step of adjusting the second brightness is performed until the display effect of the current remaining region meets the preset requirement; in addition, before the step of performing the second brightness adjustment, it is further determined whether the total number of times of brightness compensation of the display panel is less than a second preset number of times, and when it is determined that the total number of times of brightness compensation of the display panel is less than the second preset number of times, the step of performing the second brightness adjustment is performed. By adopting the method, the color cast of the display picture can be further avoided, and the uniformity of the image display of the display panel can be ensured.
As shown in fig. 5, a specific flow of the present embodiment includes:
s501: and acquiring a region to be compensated of the display panel.
S502: and calculating a compensation gray-scale value of the region to be compensated, and performing first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient.
S503: judging whether the display effect of the to-be-compensated area after the first brightness compensation meets a preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement; when it is determined that the preset requirement is not satisfied, step S504 is executed.
S504: and adjusting the initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and the preset requirement to obtain a first compensation gain coefficient.
S505: and performing second brightness compensation on the region to be compensated according to the compensation gray-scale value and the first compensation gain coefficient.
S506: judging whether the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement or not, and ending the process when the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement; when it is determined that the preset requirement is not satisfied, step S507 is executed.
S507: judging whether a sub-region with a display effect meeting a preset requirement and the size being in a preset proportion with the size of the region to be compensated exists in the region to be compensated, if so, taking the first compensation gain coefficient as an initial compensation gain coefficient, and executing the step S504; when it is determined to be present, step S508 is executed.
S508: and adjusting the first compensation gain coefficient according to the difference between the display effect of the current residual area and the preset requirement to obtain a second compensation gain coefficient.
S509: and performing third brightness compensation on the residual region according to the compensation gray-scale value and the second compensation gain coefficient.
S510: judging whether the display effect of the residual area after the third brightness compensation meets the preset requirement, and executing the step S511 when the display effect of the residual area after the third brightness compensation does not meet the preset requirement; and when the preset requirement is judged to be met, ending the process.
S511: and acquiring the total times of brightness compensation of the display panel.
S512: judging whether the total times is less than a second preset time, and if so, taking the residual area after the third brightness compensation as the area to be compensated, and executing the step S508; upon determining that it is greater than or equal to the second preset number of times, step S513 is executed.
Specifically, the size of the second preset number is not specifically limited in this embodiment, and may be set according to actual requirements.
S513: and recording all compensation gain coefficients and compensation gray-scale values for compensating the area to be compensated.
Specifically, in the embodiment, all compensation gain coefficients are first compensation gain coefficients for compensating the region to be compensated, and second compensation gain coefficients for compensating the remaining region, it can be understood that the embodiment performs multiple compensations for narrowing the range of the remaining region, that is, continuously compensates the first region in the remaining region whose display effect does not meet the preset requirement, and the regions other than the first region in the remaining region are not compensated; and then compensating a second area, of which the display effect does not meet the preset requirement, in the first area, and so on until the total brightness compensation times are greater than or equal to a second preset time, or the display effects of all the areas meet the preset requirement.
Compared with the prior art, the embodiment of the invention realizes the primary brightness compensation of the area to be compensated by calculating the compensation gray-scale value of the area to be compensated and carrying out the first brightness compensation on the area to be compensated according to the compensation gray-scale value and the preset initial compensation gain coefficient; the compensation effect after the first brightness compensation is quantified and confirmed (namely whether the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement is judged), and the brightness compensation is carried out on the to-be-compensated area again when the display effect does not meet the preset requirement, so that the reliability of the brightness compensation method is improved in a multi-time compensation mode; in addition, the second brightness compensation mode is to adjust the initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and the preset requirement to obtain the first compensation gain coefficient, and then perform the second brightness compensation on the to-be-compensated area according to the compensation gray-scale value and the first compensation gain coefficient, so that the effect of the second brightness compensation is better than that of the first brightness compensation, the reliability of the brightness compensation method is further improved, and the uniformity of image picture display is realized.
A sixth embodiment of the present invention relates to a luminance compensation system 100, as shown in fig. 6, including:
the shooting device 1, the calculating device 2, the judging device 3 and the processing device 4; the shooting device 1 is used for shooting a display picture of a display panel, and the processing device 4 is used for determining a region to be compensated of the display panel according to the display picture; the calculating device 2 is used for calculating a compensation gray-scale value of the region to be compensated, and the processing device 4 is further used for performing first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient; the judging device 3 is configured to judge whether the display effect of the to-be-compensated region after the first brightness compensation meets a preset requirement, and the processing device 4 is further configured to adjust the initial compensation gain coefficient according to a difference between the display effect of the to-be-compensated region and the preset requirement when the judging device judges that the display effect of the to-be-compensated region does not meet the preset requirement, obtain a first compensation gain coefficient, and perform a second brightness compensation on the to-be-compensated region according to the compensation gray-scale value and the first compensation gain coefficient.
The seventh embodiment of the present invention relates to a display panel 200 including: the screen body 11, at least one processor 12 arranged in the screen body 11; and a memory 13 communicatively coupled to the at least one processor 12; the memory 13 is configured to store a compensation gray-scale value and a first compensation gain coefficient, where the compensation gray-scale value is obtained according to a to-be-compensated region of the display panel, and the first compensation gain coefficient is obtained by adjusting an initial compensation gain coefficient according to a difference between a display effect of the to-be-compensated region and a preset requirement; the processor 12 is configured to perform brightness compensation on the region to be compensated according to the compensation gray scale value and the first compensation gain coefficient stored in the memory 13. .
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims (8)

1. A method for compensating brightness of a display panel, comprising:
acquiring a region to be compensated of a display panel;
calculating a compensation gray-scale value of the region to be compensated, and performing first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient;
judging whether the display effect of the to-be-compensated area after the first brightness compensation meets a preset requirement or not, and performing first brightness adjustment on the to-be-compensated area when the preset requirement is judged not to be met, wherein the first brightness adjustment specifically comprises the following steps:
adjusting the initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and the preset requirement to obtain a first compensation gain coefficient;
performing second brightness compensation on the area to be compensated according to the compensation gray-scale value and the first compensation gain coefficient;
judging whether the display effect of the to-be-compensated area after the second brightness compensation meets the preset requirement or not, and performing second brightness adjustment on the to-be-compensated area when the preset requirement is judged not to be met, wherein the second brightness adjustment specifically comprises the following steps:
judging whether a sub-area exists in the area to be compensated, wherein the display effect of the sub-area meets a preset requirement, and the size of the sub-area is in a preset proportion to the size of the area to be compensated;
when the sub-area does not exist, taking the first compensation gain coefficient as the initial compensation gain coefficient, and executing the first brightness adjustment step until the sub-area exists, the display effect of which meets the preset requirement, and the area range of which is in a preset proportion with the area range of the area to be compensated;
when the sub-region is judged to exist, adjusting the first compensation gain coefficient according to the difference between the display effect of the current remaining region and the preset requirement to obtain a second compensation gain coefficient, wherein the sub-region and the remaining region jointly form the region to be compensated;
and performing third brightness compensation on the residual region according to the compensation gray-scale value and the second compensation gain coefficient.
2. The luminance compensation method of a display panel according to claim 1, further comprising, after determining that the sub-region is not present:
acquiring the total times of brightness compensation of the display panel;
judging whether the total times is less than a first preset time, and executing the first brightness adjustment when the total times is less than the first preset time;
and when the judgment result is greater than or equal to the first preset times, recording all compensation gain coefficients and the compensation gray-scale value for compensating the to-be-compensated area.
3. The luminance compensation method of a display panel according to claim 1, further comprising, after performing a third luminance compensation on the remaining region according to the compensation gray-scale value and the second compensation gain coefficient:
and judging whether the display effect of the residual area after the third brightness compensation meets the preset requirement, and when the display effect of the residual area after the third brightness compensation does not meet the preset requirement, taking the residual area after the third brightness compensation as the area to be compensated, and executing the step of adjusting the second brightness until the display effect of the current residual area meets the preset requirement.
4. The method of claim 3, further comprising, after determining that the display effect of the third remaining area after brightness compensation does not satisfy the preset requirement:
acquiring the total times of brightness compensation of the display panel;
judging whether the total times is less than a second preset time, and executing the second brightness adjustment when the total times is less than the second preset time;
and when the judgment result is greater than or equal to the second preset times, recording all compensation gain coefficients and the compensation gray-scale value for compensating the to-be-compensated area.
5. The method according to any one of claims 1 to 4, wherein the obtaining the region to be compensated of the display panel comprises:
acquiring a region to be compensated of the display panel under a plurality of different gray scales;
the calculating the compensation gray-scale value of the region to be compensated and performing the first brightness compensation on the region to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient includes:
and calculating a plurality of compensation gray scale values of the to-be-compensated region under a plurality of different gray scales, and performing first brightness compensation on the to-be-compensated region corresponding to the compensation gray scale values according to the compensation gray scale values and a preset initial compensation gain coefficient, wherein one compensation gray scale value corresponds to the to-be-compensated region under one gray scale.
6. The method according to any one of claims 1 to 4, wherein the determining whether the display effect of the first luminance-compensated region to be compensated meets a preset requirement comprises:
judging whether the difference between the brightness mean value of the to-be-compensated area after the first brightness compensation and a normal brightness value meets a preset requirement, wherein the normal brightness value is the brightness mean value of a non-to-be-compensated area in a preset range outside the to-be-compensated area;
judging whether the difference between the brightness mean value and the normal brightness value meets a preset requirement or not according to the following formula:
|L-La1|/La1≤e；
and when | L-La1|/La1 is not more than e, the difference between the brightness mean value and the normal brightness value meets a preset requirement.
7. An illumination compensation system, comprising: the device comprises a shooting device, a calculating device, a judging device and a processing device;
the shooting device is used for shooting a display picture of the display panel, and the processing device is used for determining a region to be compensated of the display panel according to the display picture;
the computing device is used for computing a compensation gray-scale value of the area to be compensated, and the processing device is also used for performing first brightness compensation on the area to be compensated according to the compensation gray-scale value and a preset initial compensation gain coefficient;
the judging device is used for judging whether the display effect of the to-be-compensated area after the first brightness compensation meets the preset requirement, and the processing device is further used for performing first brightness adjustment when the judging device judges that the display effect of the to-be-compensated area does not meet the preset requirement, specifically: adjusting the initial compensation gain coefficient according to the difference between the display effect of the area to be compensated and a preset requirement to obtain a first compensation gain coefficient, and performing second brightness compensation on the area to be compensated according to the compensation gray-scale value and the first compensation gain coefficient;
the judging device is further configured to judge whether the display effect of the to-be-compensated region after the second brightness compensation meets a preset requirement, and perform a second brightness adjustment when the display effect of the to-be-compensated region is judged not to meet the preset requirement, specifically: the judgment device judges whether a sub-region with a display effect meeting a preset requirement and a preset proportion between the size of the sub-region and the size of the sub-region to be compensated exists in the region to be compensated, and the processing device is further used for taking the first compensation gain coefficient as the initial compensation gain coefficient when the judgment device judges that the sub-region does not exist, and executing the first brightness adjustment step until the sub-region with the display effect meeting the preset requirement and the preset proportion between the range of the sub-region and the range of the region to be compensated exists; the processing device is further configured to, when the judging device judges that the sub-region exists, adjust the first compensation gain coefficient according to a difference between a display effect of the current remaining region and a preset requirement to obtain a second compensation gain coefficient, where the sub-region and the remaining region together form the region to be compensated, and perform third brightness compensation on the remaining region according to the compensation gray-scale value and the second compensation gain coefficient.
8. A display panel, comprising: the screen comprises a screen body and at least one processor arranged in the screen body; and a memory communicatively coupled to the at least one processor;
the memory is used for storing a compensation gray-scale value and a first compensation gain coefficient, the compensation gray-scale value is obtained according to a to-be-compensated area of the display panel, and the first compensation gain coefficient is obtained by adjusting an initial compensation gain coefficient according to the difference between the display effect of the to-be-compensated area and a preset requirement;
the processor is used for performing brightness compensation on the area to be compensated according to the compensation gray-scale value and the first compensation gain coefficient stored in the memory;
the memory is further used for storing a second compensation gain coefficient, and the second compensation gain coefficient is obtained by adjusting the first compensation gain coefficient according to the difference between the display effect of the remaining area, except for the sub-area meeting the preset requirement, in the current area to be compensated and the preset requirement;
the processor is further configured to perform brightness compensation on the current remaining region according to the compensation gray scale value and the second compensation gain coefficient stored in the memory.
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CN112967669B (en) * 2021-03-02 2022-07-12 长春希达电子技术有限公司 Correction method for improving gray scale consistency of LED display screen
CN113140186B (en) * 2021-04-22 2022-11-01 武汉华星光电半导体显示技术有限公司 Display panel compensation method and display device
CN113112947B (en) * 2021-04-23 2022-08-05 武汉华星光电半导体显示技术有限公司 Display device and driving method thereof
US11699381B2 (en) 2021-04-23 2023-07-11 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Display device, driving method thereof, and electronic device
CN113889036A (en) * 2021-10-13 2022-01-04 合肥维信诺科技有限公司 Method for determining compensation gray scale value, compensation method, compensation device, compensation equipment and compensation medium
CN114170947B (en) 2021-12-14 2023-05-30 武汉华星光电半导体显示技术有限公司 Mura compensation method of display panel and display panel
CN114299841B (en) * 2021-12-29 2023-11-24 合肥维信诺科技有限公司 Screen brightness compensation method
CN114639346B (en) * 2022-04-20 2023-07-21 武汉天马微电子有限公司 Mura compensation method, apparatus, device, storage medium and computer program product

Family Cites Families (9)

* Cited by examiner, † Cited by third party
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JP6167324B2 (en) * 2012-07-25 2017-07-26 株式会社Ｊｏｌｅｄ Display device, image processing device, and image processing method
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KR102227636B1 (en) * 2014-12-31 2021-03-16 삼성디스플레이 주식회사 Data storage device for display device and method of storaging data thereof
CN106652966B (en) * 2017-03-20 2019-11-05 北京京东方显示技术有限公司 Grayscale signal compensating unit, compensation method, source electrode driver and display device
CN107845369B (en) * 2017-11-17 2019-07-16 苏州华兴源创科技股份有限公司 A kind of dynamic adjusting method and system of LED backlight brightness
CN109637434A (en) * 2018-12-29 2019-04-16 深圳市奥拓电子股份有限公司 Bearing calibration, correction system and the machine readable storage medium of mosaic display screen
CN110010065B (en) * 2019-04-30 2021-01-01 深圳市华星光电半导体显示技术有限公司 Display panel brightness adjusting method and display panel brightness adjusting system
CN110021271B (en) * 2019-05-23 2021-03-23 京东方科技集团股份有限公司 Optical compensation method, optical compensation system, display method and display device
CN110728947B (en) * 2019-09-21 2021-10-26 深圳市奥拓电子股份有限公司 LED display screen correction method, system and machine-readable storage medium

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