CN111710277A - Compensation method and device of display panel - Google Patents
Compensation method and device of display panel Download PDFInfo
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- CN111710277A CN111710277A CN202010597550.1A CN202010597550A CN111710277A CN 111710277 A CN111710277 A CN 111710277A CN 202010597550 A CN202010597550 A CN 202010597550A CN 111710277 A CN111710277 A CN 111710277A
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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
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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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
Abstract
The invention discloses a compensation method and device of a display panel. The method comprises the steps of carrying out initial compensation on a display panel by adopting initial compensation values corresponding to sub-pixels of the display panel under a first gray scale, and determining areas to be compensated of the display panel after the initial compensation; determining a compensation gain value corresponding to each region to be compensated according to the brightness value of the target sub-pixel in each region to be compensated and the brightness average value of each sub-pixel in the reference region of the display panel; and compensating each area to be compensated of the display panel according to the initial compensation value and the compensation gain value. According to the embodiment of the invention, different compensations can be carried out according to the defect degree of each region to be compensated, and each region to be compensated can be ensured to obtain a better compensation effect.
Description
Technical Field
The invention relates to the field of display, in particular to a compensation method and a compensation device of a display panel.
Background
In the production process of the display panel, Mura (uneven brightness) may occur on the display panel due to production processes, materials, and the like. The existence of these Mura defects can affect the display effect of the display panel. After the display panel is produced, for Mura defects on the display panel, a Demura (brightness and darkness non-uniformity compensation) technology can be adopted to solve the Mura defects.
However, different Mura defects exist on the display panel, and in the prior art, the same compensation mode is adopted to compensate the different Mura defects, so that the better compensation effect of each Mura defect can not be ensured.
Disclosure of Invention
The embodiment of the invention provides a compensation method and device for a display panel, which can perform different compensation according to the defect degree of each to-be-compensated area, and ensure that each to-be-compensated area can obtain a better compensation effect.
In a first aspect, an embodiment of the present invention provides a compensation method for a display panel, including:
performing initial compensation on the display panel by adopting initial compensation values corresponding to the sub-pixels of the display panel under the first gray scale, and determining each region to be compensated of the display panel after the initial compensation;
determining a compensation gain value corresponding to each region to be compensated according to the brightness value of the target sub-pixel in each region to be compensated and the brightness average value of each sub-pixel in the reference region of the display panel;
and compensating each area to be compensated of the display panel according to the initial compensation value and the compensation gain value.
In a possible implementation manner of the first aspect, the determining, according to the luminance value of the target sub-pixel in each to-be-compensated region and the luminance average value of each sub-pixel in the reference region of the display panel, a compensation gain value corresponding to each to-be-compensated region includes:
for any one to-be-compensated area, if the ratio of the difference value of the brightness value of the target sub-pixel and the brightness average value to the brightness average value is within a first preset range, determining that the compensation gain value corresponding to the to-be-compensated area is 1;
for any one to-be-compensated region, if the ratio of the difference value between the brightness value of the target sub-pixel and the brightness average value to the brightness average value is not within a first preset range, determining that the compensation gain value corresponding to the to-be-compensated region is a value greater than 1 or less than 1 and greater than 0.
In a possible implementation manner of the first aspect, if the compensation gain value of the to-be-compensated region is not 1, the method further includes:
compensating the region to be compensated by adopting the product of the initial compensation value and the compensation gain value to obtain a compensation brightness value;
if the compensation brightness value does not meet the preset condition, adjusting the compensation gain value, compensating the region to be compensated by adopting the product of the initial compensation value and the adjusted compensation gain value until the compensation brightness value meets the preset condition, and taking the adjusted compensation gain value as a final compensation gain value;
correspondingly, the compensation of each region to be compensated of the display panel by adopting the initial compensation value and the compensation gain value comprises the following steps:
and compensating each region to be compensated of the display panel by adopting the product of the initial compensation value and the final compensation gain value.
In a possible implementation manner of the first aspect, if the compensation luminance value does not satisfy the predetermined condition, the method includes:
if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated and the brightness average value to the brightness average value is within a second preset range, the compensation brightness value meets a preset condition;
and if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated to-be-compensated area and the brightness average value to the brightness average value is not in a second preset range, the compensation brightness value does not meet the preset condition.
In a possible implementation manner of the first aspect, if the compensation brightness value does not satisfy the preset condition, adjusting the compensation gain value includes:
if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated and the brightness average value to the brightness average value is smaller than the minimum value of a second preset range, adjusting the compensation gain value towards the direction of increasing the compensation gain value;
and if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated to the brightness average value is larger than the maximum value of the second preset range, adjusting the compensation gain value towards the direction of reducing the compensation gain value.
In a possible implementation manner of the first aspect, the method further includes:
if the first gray scale belongs to the first preset gray scale range, the total times of adjusting the compensation gain value is less than or equal to M;
if the first gray scale belongs to the second preset gray scale range, the total times of adjusting the compensation gain value are less than or equal to N;
the minimum value of the first preset gray scale range is larger than or equal to the maximum value of the second preset gray scale range, M is larger than N, and M and N are positive integers.
In a possible implementation manner of the first aspect, if the first gray scale belongs to a first preset gray scale range and the compensation brightness value of the region to be compensated corresponding to each adjustment in M adjustments does not satisfy the preset result, or if the first gray scale belongs to a second preset gray scale range and the compensation brightness value of the region to be compensated corresponding to each adjustment in N adjustments does not satisfy the preset result, taking the adjusted compensation gain value as a final compensation gain value, includes:
and determining the optimal compensation brightness value in the compensation brightness values of the corresponding to-be-compensated areas after each adjustment, and taking the compensation gain value corresponding to the optimal compensation brightness value as the final compensation gain value.
In a possible implementation manner of the first aspect, the target sub-pixel is a sub-pixel having a largest difference between a luminance value of a sub-pixel in the region to be compensated and an average luminance value of the region to be compensated.
In a possible implementation manner of the first aspect, the reference region is a region adjacent to a region to be compensated in the display panel, and brightness compensation is not required after initial compensation of the reference region.
In a second aspect, an embodiment of the present invention provides a compensation apparatus for a display panel, including:
the to-be-compensated region determining module is used for performing initial compensation on the display panel by adopting initial compensation values corresponding to the sub-pixels of the display panel under the first gray scale and determining each to-be-compensated region of the display panel after the initial compensation;
the compensation gain value determining module is used for determining a compensation gain value corresponding to each to-be-compensated area according to the brightness value of the target sub-pixel in each to-be-compensated area and the brightness average value of each sub-pixel in the reference area of the display panel;
and the compensation module is used for compensating each region to be compensated of the display panel according to the initial compensation value and the compensation gain value.
According to the compensation method and device of the display panel provided by the embodiment of the invention, the display panel is initially compensated, each region to be compensated of the display panel after initial compensation is determined, then the brightness value of the target sub-pixel in each region to be compensated is compared with the brightness average value of each sub-pixel in the reference region of the display panel, the defect degree of each region to be compensated is determined, if the defect degree of each region to be compensated is different, the corresponding compensation gain value is also different, and finally, each region to be compensated of the display panel is compensated by using the initial compensation value and the compensation gain value. Different compensation is performed according to the defect degree of each to-be-compensated area, and therefore the to-be-compensated areas can obtain a good compensation effect.
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Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
Fig. 1 is a schematic flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating a compensation apparatus of a display panel according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Embodiments of a compensation method and a compensation apparatus for a display panel according to embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiments of the present invention provide a compensation method for a display panel, which is used for the display panel, and the display panel may be an Organic Light Emitting Diode (OLED) display panel or a liquid crystal display panel.
Fig. 1 is a flowchart illustrating a compensation method of a display panel according to an embodiment of the present invention.
As shown in fig. 1, a compensation method for a display panel according to an embodiment of the present invention may include the following steps:
and 110, performing initial compensation on the display panel by using the initial compensation value corresponding to each sub-pixel of the display panel under the first gray scale, and determining each region to be compensated of the display panel after the initial compensation.
And step 120, determining a compensation gain value corresponding to each region to be compensated according to the brightness value of the target sub-pixel in each region to be compensated and the brightness average value of each sub-pixel in the reference region of the display panel.
And step 130, compensating each region to be compensated of the display panel according to the initial compensation value and the compensation gain value.
According to the compensation method of the display panel provided by the embodiment of the invention, the display panel is initially compensated, each region to be compensated of the display panel after initial compensation is determined, then the brightness value of the target sub-pixel in each region to be compensated is compared with the brightness average value of each sub-pixel in the reference region of the display panel, the defect degree of each region to be compensated is determined, if the defect degree of each region to be compensated is different, the corresponding compensation gain value is also different, and finally, each region to be compensated of the display panel is compensated by using the initial compensation value and the compensation gain value. Different compensation is performed according to the defect degree of each to-be-compensated area, and therefore the to-be-compensated areas can obtain a good compensation effect.
For example, in step 110, the first gray scale may be any gray scale that the display panel can display. For example, the display panel can display gray scales ranging from 0 to 255, and the first gray scale can be 60 gray scales, 120 gray scales, 234 gray scales, and the like.
The display panel may include red, green, and blue sub-pixels. The compensation gain values corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel under each gray scale can be determined in sequence.
Before step 110, taking the first gray level as the 120 gray level as an example, the initial compensation value corresponding to each sub-pixel at the 120 gray level can be determined. For example, a data voltage corresponding to 120 gray scales is input to each sub-pixel of the display panel, and image data of each sub-pixel of the display panel at 120 gray scales is acquired by using an image acquisition device. The image capture device may be a color analyzer, such as CA410, CA310, or the like. To avoid interference from ambient light, image acquisition may be performed in a dark room. The image acquisition device can be placed right above the display panel, and the focusing of the image acquisition device is ensured, so that the image data of the display panel can be accurately acquired.
In some embodiments, the initial compensation value corresponding to each sub-pixel may be determined according to the collected luminance value of each sub-pixel at the 120 gray level and the average luminance value of the display panel at the 120 gray level. The initial compensation value may be an initial gray scale compensation value, wherein a certain initial gray scale compensation value is added to a darker sub-pixel (to increase the brightness), and a certain initial gray scale compensation value is reduced to a brighter sub-pixel (to decrease the brightness).
On the basis of the first gray scale, each sub-pixel adds or subtracts an initial compensation value to obtain a processed gray scale value corresponding to each sub-pixel, data voltage corresponding to the processed gray scale value is input to each sub-pixel of the display panel, namely, the initial compensation value corresponding to each sub-pixel under the first gray scale is used for initially compensating the display panel, image data of the processed gray scale value of each sub-pixel of the display panel is acquired by image acquisition equipment, and the display panel may still have a region to be compensated, namely a Mura region. The number of the regions to be compensated may be plural, for example, the region a to be compensated, the region B to be compensated, the region C to be compensated, and the like.
In some embodiments, the area to be compensated may be determined according to the brightness value of each sub-pixel of the display panel after the initial compensation and the average brightness value of the display panel after the initial compensation.
In some optional embodiments, step 120 may specifically include: for any one to-be-compensated area, if the ratio of the difference value of the brightness value of the target sub-pixel and the brightness average value to the brightness average value is within a first preset range, determining that the compensation gain value corresponding to the to-be-compensated area is 1; for any one to-be-compensated region, if the ratio of the difference value between the brightness value of the target sub-pixel and the brightness average value to the brightness average value is not within a first preset range, determining that the compensation gain value corresponding to the to-be-compensated region is a value greater than 1 or less than 1 and greater than 0.
In this application, the target sub-pixel may be a sub-pixel having a largest difference between a luminance value of a sub-pixel in the region to be compensated and an average luminance value of the region to be compensated. Namely, the sub-pixel with the maximum deviation from the integral horizontal in the area to be compensated is found out as the target sub-pixel according to the integral horizontal of the area to be compensated. The purpose of the compensation is to reduce the luminance of the brighter sub-pixels and increase the luminance of the darker sub-pixels, thereby making the luminance of the sub-pixels uniform as a whole. Therefore, the target sub-pixel can better represent the defect degree of the area to be compensated, and the defect degree of the area to be compensated can be more accurately determined according to the brightness value of the target sub-pixel.
In the present application, the reference region may be a region adjacent to a region to be compensated in the display panel, and luminance compensation is not required after the initial compensation of the reference region. Namely, the reference region is a non-Mura region adjacent to the region to be compensated. The compensation purpose also comprises the reduction of the brightness difference of adjacent areas, on one hand, the reference area is adjacent to the area to be compensated, so that the brightness difference of each adjacent area of the compensated display panel can be better ensured; on the other hand, the reference region is not a Mura region, so that the region to be compensated is further compensated and then is also a non-Mura region.
In some embodiments, the compensation gain value may be a magnification or reduction factor of the initial compensation value. For example, the first preset range may be (-e, e), if the luminance value of the target sub-pixel in the region to be compensated is L1, the average luminance value of each sub-pixel in the reference region of the display panel is L2, and if-e < (L1-L2)/L2< e, the initial compensation value is used to compensate the region to be compensated, so that the Mura defect of the region to be compensated can be reduced, and the initial compensation value does not need to be scaled, and the compensation gain value corresponding to the region to be compensated is determined to be 1, thereby avoiding changing the size of the initial compensation value and increasing the defect degree of the region to be compensated.
If (L1-L2)/L2< -e or (L1-L2)/L2> e, the initial compensation value is adopted to compensate the region to be compensated, the Mura defect of the region to be compensated cannot be reduced, and the size of the initial compensation value needs to be further changed. For example, if the area to be compensated is dark and the size of the initial compensation value needs to be increased, (L1-L2)/L2< -e), the compensation gain value corresponding to the area to be compensated is determined to be a value greater than 1. And if the to-be-compensated area is bright and the size of the initial compensation value needs to be reduced in the (L1-L2)/L2> e, determining that the compensation gain value corresponding to the to-be-compensated area is a value smaller than 1 and larger than 0. Therefore, different compensation gain values can be set for different defects, and targeted and effective compensation for different defect areas is realized. The size of the first preset range may be determined empirically, and the application is not limited thereto.
In addition, the gray scale value and the brightness are positively correlated, i.e., the larger the gray scale value, the larger the brightness. The average luminance value L2 in the high gray scale range is larger than the average luminance value L2 in the low gray scale range. If-e < (L1-L2)/L2< e, i.e., -e L2< L1-L2< e L2, e is fixed, the determination criteria for the low gray scale range and the high gray scale range are different from each other. Although the difference between L1 and L2 in the high gray scale range is relatively large, as long as-e × L2< L1-L2< e × L2 is met, the initial compensation value does not need to be scaled, and the compensation gain value corresponding to the to-be-compensated region is determined to be 1.
In some embodiments, before step 130, and if the compensation gain value of the to-be-compensated region is not 1, the compensation method of the display panel provided in the embodiment of the present invention may further include: compensating the region to be compensated by adopting the product of the initial compensation value and the compensation gain value to obtain a compensation brightness value; and if the compensation brightness value does not meet the preset condition, adjusting the compensation gain value, compensating the region to be compensated by adopting the product of the initial compensation value and the adjusted compensation gain value until the compensation brightness value meets the preset condition, and taking the adjusted compensation gain value as the final compensation gain value.
Correspondingly, step 130 may specifically include: and compensating each region to be compensated of the display panel by adopting the product of the initial compensation value and the final compensation gain value.
Illustratively, after the compensation gain value of the region to be compensated is determined for the first time, the compensation effect is quantified and confirmed. Specifically, the adjusted initial compensation value may be obtained by multiplying the initial compensation value by the compensation gain value, the data voltage corresponding to the adjusted initial compensation value is input to the region to be compensated, and then the luminance data of the region to be compensated is acquired by using the image acquisition device. If the acquired brightness data meet the preset conditions, the first determined compensation gain value is proved to meet the requirements, and the purpose of reducing or eliminating the defects of the to-be-compensated area can be achieved. If the acquired brightness data does not meet the preset conditions, the compensation gain value needs to be further adjusted, and after the compensation gain value is adjusted each time, the compensation effect of the compensation gain value adjusted each time can be quantitatively confirmed according to the above mode until the compensation effect of the compensation gain value adjusted each time meets the requirements. Therefore, the compensation gain value is adjusted for multiple times, the compensation effect of the compensation gain value after each adjustment is quantitatively confirmed, the defect degree of the region to be compensated can be gradually reduced, effective compensation of the region to be compensated is realized, and the display quality of the display panel is improved.
In some embodiments, if the compensation brightness value does not satisfy the predetermined condition, the method includes: if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated and the brightness average value to the brightness average value is within a preset range, the compensation brightness value meets a preset condition; and if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated to-be-compensated area and the brightness average value to the brightness average value is not in the preset range, the compensation brightness value does not meet the preset condition.
As described above, the target sub-pixel may be a sub-pixel having a largest difference between the luminance value of the sub-pixel in the region to be compensated and the average luminance value of the region to be compensated. Therefore, after the compensation is performed on the region to be compensated by using the product of the initial compensation value and the compensation gain value, the target sub-pixel in the region to be compensated may not be the sub-pixel at the same position as the target sub-pixel in the region to be compensated which is compensated by using only the initial compensation value in step 120. The specific position of the target sub-pixel in the region to be compensated is not limited in the present application.
In some embodiments, the second predetermined range may be the same as or different from the first predetermined range.
For example, the second preset range may be the same as the first preset range, and after the compensation region to be compensated is compensated by taking the product of the initial compensation value and the original or adjusted compensation gain value, if the luminance value of the target sub-pixel in the compensation region is L11, the average luminance value of each sub-pixel in the reference region of the display panel is L21, and if-e < (L11-L21)/L21< e, the original or adjusted compensation gain value is considered to meet the condition. If (L11-L21)/L21< -e or (L11-L21)/L21> e, the original or adjusted compensation gain value is still not qualified, and more compensation gain values are required to be further adjusted.
The brightness value of the target sub-pixel in the compensated region to be compensated is compared with the average brightness value of the reference region, so that the compensation effect of the compensation gain value adjusted each time can be reasonably judged, and the appropriate compensation gain value can be reasonably determined.
In some embodiments, if the compensation brightness value does not satisfy the preset condition, the step of adjusting the compensation gain value may specifically include: if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated and the brightness average value to the brightness average value is smaller than the minimum value of the preset range, adjusting the compensation gain value towards the direction of increasing the compensation gain value; and if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated to the brightness average value is larger than the maximum value of the preset range, adjusting the compensation gain value towards the direction of reducing the compensation gain value.
As described above, if (L11-L21)/L21< -e), the area to be compensated is still dark, the magnitude of the initial compensation value needs to be increased, the amplification degree of the initial compensation value needs to be increased, and the compensation gain value is adjusted toward the direction of increasing the compensation gain value, so that a relatively proper compensation gain value can be determined more quickly, and the efficiency is improved.
Similarly, if (L11-L21)/L21> e, the area to be compensated is still bright, the size of the initial compensation value needs to be decreased, and the degree of reduction of the initial compensation value needs to be decreased, and the compensation gain value is adjusted toward the direction of decreasing the compensation gain value, so that a relatively proper compensation gain value can be determined more quickly, and the efficiency is improved.
In some embodiments, the compensation method for a display panel provided by the embodiments of the present invention may further include: if the first gray scale belongs to the first preset gray scale range, the total times of adjusting the compensation gain value is less than or equal to M; if the first gray scale belongs to the second preset gray scale range, the total times of adjusting the compensation gain value are less than or equal to N; the minimum value of the first preset gray scale range is larger than or equal to the maximum value of the second preset gray scale range, M is larger than N, and M and N are positive integers.
For example, there may be a case where the compensation brightness value cannot meet the preset condition even though the compensation gain value is adjusted for an unlimited number of times, thereby affecting the efficiency. Therefore, an upper limit of the number of adjustments can be set, and the compensation gain value can be adjusted within a limited number of times to avoid affecting efficiency.
The first predetermined gray scale range is a high gray scale range, and the second predetermined gray scale range is a low gray scale range. For example, the 128 gray level to 255 gray level may be in a high gray level range, and the 0 gray level to 127 gray level may be in a low gray level range. Specific range values of the first preset gray scale range and the second preset gray scale range can be set according to actual requirements, and the range values are not limited in the application.
In the low gray scale range, the corresponding initial compensation value is smaller, so that the compensation gain value is adjusted for multiple times, and the difference between the corresponding compensation effects before and after adjustment is small, so that the adjustment times corresponding to the low gray scale range can be set smaller, and the efficiency is improved.
In addition, in the low gray scale range, in order to avoid too small difference between the compensation effects before and after adjustment, the difference between the compensation gain values before and after adjustment can be set to be larger.
In the high gray scale range, the corresponding initial compensation value is relatively large, so that the compensation gain value is adjusted for multiple times, and the difference between the corresponding compensation effects before and after adjustment is relatively large, so that the adjustment times corresponding to the high gray scale range can be set to be large, and the situation that no proper compensation gain value exists in multiple times of adjustment is avoided.
In addition, in the high gray scale range, in order to avoid too large difference between the compensation effects before and after adjustment, the difference between the compensation gain values before and after adjustment can be set smaller.
In some embodiments, if the first gray scale belongs to a first predetermined gray scale range and the compensation brightness value of the corresponding to-be-compensated region after each adjustment in the M adjustments does not satisfy the predetermined result, or if the first gray scale belongs to a second predetermined gray scale range and the compensation brightness value of the corresponding to-be-compensated region after each adjustment in the N adjustments does not satisfy the predetermined result, taking the adjusted compensation gain value as the final compensation gain value, includes: and determining the optimal compensation brightness value in the compensation brightness values of the corresponding to-be-compensated areas after each adjustment, and taking the compensation gain value corresponding to the optimal compensation brightness value as the final compensation gain value.
The compensation gain value corresponding to the optimal compensation brightness value is used as the final compensation gain value, so that the most appropriate compensation gain value can be determined in limited adjustment, and the optimal compensation of the display panel is realized while the efficiency is ensured.
Fig. 2 is a schematic structural diagram illustrating a compensation apparatus of a display panel according to an embodiment of the present invention.
As shown in fig. 2, the compensation apparatus for a display panel according to an embodiment of the present invention may include the following modules:
a to-be-compensated region determining module 201, configured to perform initial compensation on the display panel by using an initial compensation value corresponding to each sub-pixel of the display panel at the first gray scale, and determine each to-be-compensated region of the display panel after the initial compensation;
a compensation gain value determining module 202, configured to determine a compensation gain value corresponding to each to-be-compensated region according to a luminance value of a target sub-pixel in each to-be-compensated region and a luminance average value of each sub-pixel in a reference region of the display panel;
the compensation module 203 is configured to compensate each to-be-compensated region of the display panel according to the initial compensation value and the compensation gain value.
According to the compensation device of the display panel provided by the embodiment of the invention, the display panel is initially compensated, each region to be compensated of the display panel after initial compensation is determined, then the brightness value of the target sub-pixel in each region to be compensated is compared with the brightness average value of each sub-pixel in the reference region of the display panel, the defect degree of each region to be compensated is determined, if the defect degree of each region to be compensated is different, the corresponding compensation gain value is also different, and finally, each region to be compensated of the display panel is compensated by using the initial compensation value and the compensation gain value. Different compensation is performed according to the defect degree of each to-be-compensated area, and therefore the to-be-compensated areas can obtain a good compensation effect.
In some optional embodiments, the compensation gain value determining module 202 is specifically configured to:
and for any one to-be-compensated area, if the ratio of the difference value of the brightness value of the target sub-pixel and the brightness average value to the brightness average value is within a first preset range, determining that the compensation gain value corresponding to the to-be-compensated area is 1. Therefore, the defect degree of the area to be compensated is prevented from being increased due to the change of the initial compensation value.
For any one to-be-compensated region, if the ratio of the difference value between the brightness value of the target sub-pixel and the brightness average value to the brightness average value is not within a first preset range, determining that the compensation gain value corresponding to the to-be-compensated region is a value greater than 1 or less than 1 and greater than 0. Therefore, different compensation gain values can be set for different defects, and targeted and effective compensation for different defect areas is realized.
In some optional embodiments, the compensation gain value determining module 202 is specifically configured to:
compensating the region to be compensated by adopting the product of the initial compensation value and the compensation gain value to obtain a compensation brightness value;
if the compensation brightness value does not meet the preset condition, adjusting the compensation gain value, compensating the region to be compensated by adopting the product of the initial compensation value and the adjusted compensation gain value until the compensation brightness value meets the preset condition, and taking the adjusted compensation gain value as a final compensation gain value;
correspondingly, the compensation module 203 is specifically configured to:
and compensating each region to be compensated of the display panel by adopting the product of the initial compensation value and the final compensation gain value.
Therefore, the compensation gain value is adjusted for multiple times, the compensation effect of the compensation gain value after each adjustment is quantitatively confirmed, the defect degree of the region to be compensated can be gradually reduced, effective compensation of the region to be compensated is realized, and the display quality of the display panel is improved.
In some optional embodiments, the compensation gain value determining module 202 is specifically configured to:
if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated and the brightness average value to the brightness average value is within a second preset range, the compensation brightness value meets a preset condition;
and if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated to-be-compensated area and the brightness average value to the brightness average value is not in a second preset range, the compensation brightness value does not meet the preset condition.
The brightness value of the target sub-pixel in the compensated region to be compensated is compared with the average brightness value of the reference region, so that the compensation effect of the compensation gain value adjusted each time can be reasonably judged, and the appropriate compensation gain value can be reasonably determined.
In some optional embodiments, the compensation gain value determining module 202 is specifically configured to:
if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated and the brightness average value to the brightness average value is smaller than the minimum value of a second preset range, adjusting the compensation gain value towards the direction of increasing the compensation gain value;
and if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to be compensated to the brightness average value is larger than the maximum value of the second preset range, adjusting the compensation gain value towards the direction of reducing the compensation gain value.
Therefore, a relatively proper compensation gain value can be determined more quickly, and the efficiency is improved.
In some optional embodiments, the compensation gain value determining module 202 is specifically configured to:
if the first gray scale belongs to the first preset gray scale range, the total times of adjusting the compensation gain value is less than or equal to M;
if the first gray scale belongs to the second preset gray scale range, the total times of adjusting the compensation gain value are less than or equal to N;
the minimum value of the first preset gray scale range is larger than or equal to the maximum value of the second preset gray scale range, M is larger than N, and M and N are positive integers.
And setting the upper limit of the adjusting times, and adjusting the compensation gain value within limited times to avoid influencing the efficiency.
In some optional embodiments, if the first gray scale belongs to a first preset gray scale range and the compensation brightness value of the region to be compensated corresponding to each adjustment in the M adjustments does not satisfy the preset result, or if the first gray scale belongs to a second preset gray scale range and the compensation brightness value of the region to be compensated corresponding to each adjustment in the N adjustments does not satisfy the preset result, the compensation gain value determining module 202 is specifically configured to:
and determining the optimal compensation brightness value in the compensation brightness values of the corresponding to-be-compensated areas after each adjustment, and taking the compensation gain value corresponding to the optimal compensation brightness value as the final compensation gain value.
The compensation gain value corresponding to the optimal compensation brightness value is used as the final compensation gain value, so that the most appropriate compensation gain value can be determined in limited adjustment, and the optimal compensation of the display panel is realized while the efficiency is ensured.
In some optional embodiments, the target sub-pixel is a sub-pixel having a largest difference between a luminance value of a sub-pixel in the region to be compensated and an average luminance value of the region to be compensated. The target sub-pixel can better represent the defect degree of the area to be compensated, and the defect degree of the area to be compensated can be more accurately determined according to the brightness value of the target sub-pixel.
In some alternative embodiments, the reference region is a region adjacent to the region to be compensated in the display panel, and the initial compensation of the reference region is not required to be followed by the brightness compensation. On one hand, the reference area is adjacent to the area to be compensated, so that the adjacent areas of the compensated display panel can be better ensured to have no brightness difference; on the other hand, the reference region is not a Mura region, so that the region to be compensated is further compensated and then is also a non-Mura region.
The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, plug-in, function card, or the like. When implemented in software, the elements of the invention are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted by a data signal carried in a carrier wave over a transmission medium or a communication link. A "machine-readable medium" may include any medium that can store or transfer information. Examples of a machine-readable medium include electronic circuits, semiconductor memory devices, ROM, flash memory, Erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, and so forth. The code segments may be downloaded via computer networks such as the internet, intranet, etc.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A compensation method for a display panel, comprising:
performing initial compensation on the display panel by adopting initial compensation values corresponding to sub-pixels of the display panel under a first gray scale, and determining each region to be compensated of the display panel after the initial compensation;
determining a compensation gain value corresponding to each region to be compensated according to the brightness value of the target sub-pixel in each region to be compensated and the brightness average value of each sub-pixel in the reference region of the display panel;
and compensating each region to be compensated of the display panel according to the initial compensation value and the compensation gain value.
2. The method according to claim 1, wherein the step of determining the compensation gain value corresponding to each of the regions to be compensated according to the luminance value of the target sub-pixel in each of the regions to be compensated and the luminance average value of each of the sub-pixels in the reference region of the display panel comprises:
for any one region to be compensated, if the ratio of the difference between the brightness value of the target sub-pixel and the brightness average value to the brightness average value is within a first preset range, determining that the compensation gain value corresponding to the region to be compensated is 1;
for any one of the regions to be compensated, if the ratio of the difference between the brightness value of the target sub-pixel and the brightness average value to the brightness average value is not within the first preset range, determining that the compensation gain value corresponding to the region to be compensated is a value greater than 1 or less than 1 and greater than 0.
3. The method of claim 2, wherein if the compensation gain value of the region to be compensated is not 1, the method further comprises:
compensating the region to be compensated by adopting the product of the initial compensation value and the compensation gain value to obtain a compensation brightness value;
if the compensation brightness value does not meet the preset condition, adjusting the compensation gain value, compensating the to-be-compensated region by adopting the product of the initial compensation value and the adjusted compensation gain value until the compensation brightness value meets the preset condition, and taking the adjusted compensation gain value as a final compensation gain value;
correspondingly, the compensating each region to be compensated of the display panel by using the initial compensation value and the compensation gain value includes:
and compensating each region to be compensated of the display panel by adopting the product of the initial compensation value and the final compensation gain value.
4. The method according to claim 3, wherein the step of, if the compensation brightness value does not satisfy a predetermined condition, further comprising:
if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to the brightness average value is within a second preset range, the compensated brightness value meets a preset condition;
and if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to the brightness average value is not in the second preset range, the compensated brightness value does not meet the preset condition.
5. The method of claim 4, wherein the adjusting the compensation gain value if the compensation brightness value does not satisfy a predetermined condition comprises:
if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to the brightness average value is smaller than the minimum value of the second preset range, adjusting the compensation gain value towards the direction of increasing the compensation gain value;
and if the ratio of the difference value of the brightness value of the target sub-pixel in the compensated region to the brightness average value is larger than the maximum value of the second preset range, adjusting the compensation gain value in the direction of reducing the compensation gain value.
6. The method of claim 3, further comprising:
if the first gray scale belongs to a first preset gray scale range, adjusting the total times of the compensation gain value to be less than or equal to M;
if the first gray scale belongs to a second preset gray scale range, the total times of adjusting the compensation gain value are less than or equal to N;
the minimum value of the first preset gray scale range is greater than or equal to the maximum value of the second preset gray scale range, M is greater than N, and M and N are positive integers.
7. The method of claim 6, wherein if the first gray scale belongs to the first predetermined gray scale range and the compensation brightness value of the region to be compensated corresponding to each adjustment in the M adjustments does not satisfy the predetermined result, or if the first gray scale belongs to the second predetermined gray scale range and the compensation brightness value of the region to be compensated corresponding to each adjustment in the N adjustments does not satisfy the predetermined result, the taking the adjusted compensation gain value as a final compensation gain value comprises:
and determining the optimal compensation brightness value in the compensation brightness values of the corresponding to-be-compensated areas after each adjustment, and taking the compensation gain value corresponding to the optimal compensation brightness value as the final compensation gain value.
8. The method according to any one of claims 1 to 7, wherein the target sub-pixel is a sub-pixel having a largest difference between a luminance value of a sub-pixel in the region to be compensated and an average luminance value of the region to be compensated.
9. The method according to any one of claims 1 to 7, wherein the reference region is a region adjacent to the region to be compensated in the display panel, and no brightness compensation is required after the initial compensation of the reference region.
10. A compensation apparatus for a display panel, comprising:
the device comprises a to-be-compensated area determining module, a compensation area determining module and a compensation area determining module, wherein the to-be-compensated area determining module is used for performing initial compensation on a display panel by adopting initial compensation values corresponding to sub-pixels of the display panel under a first gray scale and determining each to-be-compensated area of the display panel after the initial compensation;
the compensation gain value determining module is used for determining a compensation gain value corresponding to each to-be-compensated region according to the brightness value of the target sub-pixel in each to-be-compensated region and the brightness average value of each sub-pixel in the reference region of the display panel;
and the compensation module is used for compensating each region to be compensated of the display panel according to the initial compensation value and the compensation gain value.
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