Display panel brightness adjustment method and device, electronic equipment and storage medium

Abstract

The application discloses a display panel brightness adjusting method and device, electronic equipment and storage medium. The method comprises the following steps: obtaining a to-be-adjusted area of a display panel, a first gray scale parameter of a current display picture and a second gray scale parameter of a next frame picture to be displayed; determining a dynamic picture area in the to-be-adjusted area according to the first gray scale parameter and the second gray scale parameter; performing brightness unevenness compensation on the second gray scale parameter of the dynamic picture area in the to-be-adjusted area to perform liquid crystal deflection compensation; and performing brightness unevenness compensation on the second gray scale parameter of a non-dynamic picture area in the to-be-adjusted area to reduce liquid crystal deflection compensation. The application reduces the degree of brightness unevenness compensation or liquid crystal deflection compensation in the to-be-adjusted area, reduces the conflict between the two, and avoids the formation of water marks.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel brightness adjustment method and device, electronic equipment and storage medium. BACKGROUND

[0002] OD (over drive) is to reduce dynamic trailing and improve display effect by giving a higher voltage to make liquid crystal turn to target angle in a short time. PQ (picture quality) debugging is generally to achieve this purpose by changing the OD compensation value of 33 gray scale binding points. Demura debugging is to compensate for the display mura caused by process differences of the panel, and to call the ACC (Accurate Color Capture) value of other gray scales to brighten / darken the mura area, so that the subjective brightness is consistent.

[0003] According to the Demura principle, the ACC value called by Tcon in the region after Demura debugging is different from the ACC value of the region without Demura debugging, so the OD compensation values called by the two regions are different, thereby causing brightness difference in the gray scale switching process, which is manifested as water mark issue at the junction of the two regions, affecting the subjective display effect. SUMMARY

[0004] The embodiments of the present application provide a display panel brightness adjustment method and device, electronic equipment and storage medium, which reduce the degree of brightness unevenness compensation or liquid crystal deflection compensation in the to-be-adjusted region, reduce the conflict between the two, and avoid forming water marks.

[0005] In a first aspect, the embodiments of the present application provide a display panel brightness adjustment method, comprising:

[0006] obtaining a to-be-adjusted region of a display panel, a first gray scale parameter of a current display picture and a second gray scale parameter of a next frame picture to be displayed;

[0007] determining a dynamic picture region in the to-be-adjusted region according to the first gray scale parameter and the second gray scale parameter;

[0008] reducing the compensation value of brightness unevenness compensation of the second gray scale parameter of the dynamic picture region in the to-be-adjusted region, and performing liquid crystal deflection compensation based on the compensation value after reduction;

[0009] performing brightness unevenness compensation on the second gray scale parameter of the non-dynamic picture region in the to-be-adjusted region, and reducing liquid crystal deflection compensation.

[0010] In some embodiments, the compensation value of the luminance non-uniformity compensation of the second gray scale parameter of the dynamic picture region in the region to be adjusted is reduced, and liquid crystal deflection compensation is performed based on the reduced compensation value, including:

[0011] determining the actual display gray scale of the current frame of the dynamic picture region according to the first gray scale parameter;

[0012] determining the target display gray scale of the next frame of the dynamic picture region according to the second gray scale parameter;

[0013] determining the pixel driving parameter of the dynamic picture region according to the actual display gray scale, the target display gray scale, and a preset liquid crystal deflection compensation mapping table;

[0014] displaying the target display gray scale of the dynamic picture region by the pixel driving parameter.

[0015] In some embodiments, the luminance non-uniformity compensation of the second gray scale parameter of the region other than the dynamic picture region in the region to be adjusted reduces liquid crystal deflection compensation, including:

[0016] determining the target display gray scale of the next frame of the dynamic picture region according to the second gray scale parameter;

[0017] determining the next frame actual gray scale of the dynamic picture region and the driving parameter corresponding to the next frame actual gray scale according to the target display gray scale and a preset luminance non-uniformity compensation mapping table;

[0018] displaying the next frame actual gray scale of the dynamic picture region by the driving parameter corresponding to the next frame actual gray scale.

[0019] In some embodiments, before the obtaining of the region to be adjusted of the display panel, the first gray scale parameter of the current display frame, and the second gray scale parameter of the next frame to be displayed, further includes:

[0020] dividing the display region into a plurality of partitions;

[0021] obtaining the gray scale compensation value when each partition displays an arbitrary gray scale for luminance non-uniformity compensation;

[0022] determining the partition with the gray scale compensation value greater than a preset compensation value as the region to be adjusted.

[0023] In some embodiments, after the luminance non-uniformity compensation of the second gray scale parameter of the region other than the dynamic picture region in the region to be adjusted reduces liquid crystal deflection compensation, further includes:

[0024] The second gray scale parameter of the display panel other than the to-be-adjusted region is compensated for brightness unevenness and liquid crystal deflection.

[0025] In some embodiments, the partition with the gray scale compensation value greater than a preset compensation value is determined as the to-be-adjusted region, comprising:

[0026] A maximum gray scale compensation value when each partition is compensated for brightness unevenness is obtained according to the gray scale compensation value;

[0027] The partition with the maximum gray scale compensation value greater than a preset compensation value is determined as the to-be-adjusted region.

[0028] In some embodiments, the to-be-adjusted region is determined according to the first gray scale parameter and the second gray scale parameter, comprising:

[0029] The to-be-adjusted region is divided into a plurality of sub-regions;

[0030] If the difference between the first gray scale parameter and the second gray scale parameter of a target sub-region in the sub-regions is greater than a preset threshold, the target sub-region is determined as the dynamic picture region.

[0031] In a second aspect, the present application provides a display panel brightness adjustment device, comprising:

[0032] An information acquisition module is configured to acquire a to-be-adjusted region of a display panel, a first gray scale parameter of a current display picture, and a second gray scale parameter of a next frame picture to be displayed;

[0033] A region analysis module is in communication connection with the information acquisition module and is configured to determine a dynamic picture region in the to-be-adjusted region according to the first gray scale parameter and the second gray scale parameter;

[0034] A brightness compensation module is in communication connection with the region analysis module and is configured to reduce the compensation value of the second gray scale parameter of the dynamic picture region in the to-be-adjusted region for brightness unevenness compensation, and perform liquid crystal deflection compensation based on the compensation value after the reduction; and to perform brightness unevenness compensation on the second gray scale parameter of the to-be-adjusted region other than the dynamic picture region, and reduce liquid crystal deflection compensation.

[0035] In some embodiments, the brightness compensation module is further configured to determine an actual display gray scale of the current display picture of the dynamic picture region according to the first gray scale parameter; determine a target display gray scale of the next frame picture of the dynamic picture region according to the second gray scale parameter; determine a pixel driving parameter of the dynamic picture region according to the actual display gray scale, the target display gray scale, and a preset liquid crystal deflection compensation mapping table; and control the dynamic picture region to display the target display gray scale through the pixel driving parameter.

[0036] In some embodiments, the luminance compensation module is further configured to determine a target display gray scale of a next frame of the dynamic picture area according to the second gray scale parameter; determine a next frame actual gray scale of the dynamic picture area and a driving parameter corresponding to the next frame actual gray scale according to the target display gray scale and a preset luminance unevenness compensation mapping table; and control the dynamic picture area to display the next frame actual gray scale by using the driving parameter corresponding to the next frame actual gray scale.

[0037] In some embodiments, the information acquisition module is further configured to divide the display area into a plurality of sub-areas; acquire a gray scale compensation value of each sub-area when displaying an arbitrary gray scale with luminance unevenness compensation; and determine a sub-area with a gray scale compensation value greater than a preset compensation value as the to-be-adjusted area.

[0038] In some embodiments, the luminance compensation module is further configured to perform luminance unevenness compensation and liquid crystal deflection compensation on the second gray scale parameter of the display panel in the to-be-adjusted area.

[0039] In some embodiments, the information acquisition module is further configured to acquire a maximum gray scale compensation value of each sub-area when performing luminance unevenness compensation; and determine a sub-area with a maximum gray scale compensation value greater than a preset compensation value as the to-be-adjusted area.

[0040] In some embodiments, the area analysis module is further configured to divide the to-be-adjusted area into a plurality of sub-areas; and determine a target sub-area as the dynamic picture area if a difference between the first gray scale parameter and the second gray scale parameter of the target sub-area is greater than a preset threshold.

[0041] In a third aspect, the present application provides an electronic device, which comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the steps in the display panel luminance adjustment method.

[0042] In a fourth aspect, the present application provides a storage medium, which stores a plurality of instructions for a controller to implement the method.

[0043] The display panel brightness adjustment method, device, electronic equipment and storage medium provided by the embodiment of the present application can reduce the degree of compensation for the uneven brightness reduction or liquid crystal deflection compensation in the to-be-adjusted area, reduce the conflict between the two, and avoid the formation of water marks. In addition, according to the first gray scale parameter of the current display picture and the second gray scale parameter of the next frame picture to be displayed, the dynamic picture area in the to-be-adjusted area in which the next frame picture has a larger gray scale change relative to the current display picture is determined. The liquid crystal deflection degree of the dynamic picture area in the to-be-adjusted area changes greatly, the liquid crystal deflection compensation is reduced to ensure the liquid crystal deflection degree, and it is avoided that only the brightness uneven compensation cannot achieve the corresponding liquid crystal deflection degree, so that the brightness uneven compensation effect is poor. The liquid crystal deflection degree of the non-dynamic picture area in the to-be-adjusted area changes less, and the brightness uneven compensation is preferentially selected to reduce the liquid crystal deflection compensation. BRIEF DESCRIPTION OF DRAWINGS

[0044] The technical solutions and other beneficial effects of the present application will become apparent through the following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

[0045] Figure 1 FIG. 1 is a flowchart of a display panel brightness adjustment method in an embodiment of the present application;

[0046] Figure 2 FIG. 2 is a schematic diagram of liquid crystal flipping time and area brightness when different areas apply different OD compensation values in an embodiment of the present application;

[0047] Figure 3 FIG. 3 is a schematic diagram of the subjective performance of water marks in an embodiment of the present application;

[0048] Figure 4 FIG. 4 is a structural schematic diagram of a display panel brightness adjustment device in an embodiment of the present application. DETAILED DESCRIPTION

[0049] The technical solutions and other beneficial effects of the present application will become apparent through the following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0052] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0053] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the elements of the particular examples are described in the following disclosure. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application can repeat the reference numerals and / or the reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides various specific examples of processes and materials, but one of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0054] Referring to Figure 1 The embodiment of the present application provides a display panel brightness adjustment method, which comprises steps S101-S104, and specifically as follows.

[0055] S101, obtaining a to-be-adjusted region of the display panel, a first gray scale parameter of a current display picture, and a second gray scale parameter of a next frame picture to be displayed.

[0056] Specifically, the to-be-adjusted region is a partial region of the display panel, the to-be-adjusted region comprises any number of pixels, the pixels in the to-be-adjusted region are regions requiring Demura compensation, and the gray scales of the pixels in the to-be-adjusted region conflict with each other after Demura compensation (luminance unevenness compensation) and OD compensation (liquid crystal deflection compensation), resulting in water marks at the junctions between the to-be-adjusted region and non-to-be-adjusted regions of the display panel. Assuming that the current display picture of the display panel is an L98 picture, and assuming that the AB regions are adjacent, the AB regions are both L98 (the ACC value of L98 is called, and at this time, A is brighter than B subjectively) without Demura compensation, and the A region changes from L98 to L85 after Demura, while the B region remains L98, and the next frame picture to be displayed is an L128 picture, and assuming that the AB regions do not require Demura when L128, the OD compensation value called by the A region is the value of L85-L128 when the next frame picture is switched to L128, and the OD compensation value called by the B region is the value of L98-L128, so the luminances of the AB regions are different. As shown in Figure 2 , the horizontal coordinate is the time of liquid crystal deflection, and the vertical coordinate is the luminance, that is, the application of different OD compensation values to different regions will cause the speed of liquid crystal deflection to be inconsistent, thereby forming water marks in the subjective luminance difference, and the subjective performance of the water marks is as shown in Figure 3 .

[0057] The first gray scale parameter of the current display picture comprises a target gray scale parameter and an actual display gray scale of the current display picture, the target gray scale parameter is a target gray scale input into the Tcon, and the actual display gray scale is a gray scale after the Tcon compensates the target gray scale parameter through Demura compensation and / or OD compensation. The next frame picture to be displayed is a neighboring frame picture of the current display picture, and the second gray scale parameter of the next frame picture to be displayed is a target gray scale parameter of the next frame picture.

[0058] In one embodiment, the step is further preceded by: S201, dividing the display area into a plurality of partitions; S202, obtaining a gray scale compensation value when each partition displays an arbitrary gray scale to compensate for luminance unevenness; and S203, determining a partition with a gray scale compensation value greater than a preset compensation value as the to-be-adjusted area.

[0059] Specifically, the display area is divided into a plurality of partitions, and the division into a plurality of partitions is used to determine a Mura area of the display area. If the pixels of the Mura area are directly displayed with a target gray scale of the pixels, the pixels can be too bright or too dark, and therefore, Demura compensation is needed to make the actual display luminance the same as the luminance theoretically reached by the target gray scale.

[0060] The gray scale compensation value is a difference between a gray scale after Demura compensation and a target gray scale. For different partitions, some partitions can be Mura areas, that is, Demura compensation is needed to make the actual display luminance the same as the luminance theoretically reached by the target gray scale, and some partitions do not need Demura compensation and can be directly driven with the target gray scale to display the luminance theoretically reached by the target gray scale.

[0061] In addition, for the partitions belonging to the Mura area, the gray scale compensation value of some partitions is small after Demura compensation, that is, the gray scale does not change much before and after Demura compensation. Even if OD compensation is further performed, the luminance difference with the area that does not perform Demura compensation and only performs OD compensation is not large, and therefore, the partition will not have the water marks described in the above embodiment even if Demura compensation and OD compensation are simultaneously performed.

[0062] Therefore, only the partition with the gray scale compensation value greater than the preset compensation value is determined as the to-be-adjusted region, and the size of the preset compensation value is set according to the self-precision requirement, and can be adjusted in the debugging process, which is not limited in the embodiment. For example, the preset compensation value is set as 20, and the target gray scale of a partition is L100, and then when the gray scale after Demura compensation is <80 or >120, the partition is determined as the to-be-adjusted region, otherwise, when the gray scale after Demura compensation is ≥80 and ≤120, the partition is not the to-be-adjusted region. In addition, the preset compensation values corresponding to different partitions can be the same or different, which is not limited in the embodiment. The determined to-be-adjusted region is determined and written into Tcon in the debugging process to be marked, that is, the to-be-adjusted region is a fixed region.

[0063] It should be noted that, under the premise that the Tcon data processing capacity is sufficient, the to-be-adjusted region of each frame of display picture can dynamically change. When the second gray scale parameter of the next frame of picture to be displayed is acquired, the gray scales of each partition after Demura compensation of the second gray scale parameter are determined, and the partition with the gray scale compensation value greater than the preset compensation value after Demura compensation is determined as the to-be-adjusted region of the next frame of picture to be displayed for adjustment. In this way, the to-be-adjusted region of each frame of picture is dynamically analyzed.

[0064] In one embodiment, in step S203, the partition with the gray scale compensation value greater than the preset compensation value is determined as the to-be-adjusted region, including: S301, acquiring the maximum gray scale compensation value of each partition when brightness unevenness compensation is performed according to the gray scale compensation value; and S302, determining the partition with the maximum gray scale compensation value greater than the preset compensation value as the to-be-adjusted region.

[0065] Specifically, for the partition belonging to the Mura region, even if it is the same partition, when the target gray scale is different, the corresponding gray scale compensation value can be the same or different. In order to avoid water marks in the arbitrary display picture, the maximum gray scale compensation value of each partition when brightness unevenness compensation is performed is determined, and as long as the maximum gray scale compensation value is greater than the preset compensation value, the corresponding partition is determined as the to-be-adjusted region.

[0066] S102, determining a dynamic picture region in the to-be-adjusted region according to the first gray scale parameter and the second gray scale parameter.

[0067] Specifically, in the two adjacent frames, the gray scale value of the same region in the to-be-adjusted region may change or remain unchanged. Compared with the region with large change, the angle of liquid crystal deflection corresponding to the region with small change or no change is small or no change. Therefore, the dynamic picture region in the to-be-adjusted region is determined according to the first gray scale parameter and the second gray scale parameter, and the dynamic picture region is the region with large gray scale change in the next frame relative to the current display picture in the to-be-adjusted region. The dynamic picture region and the non-dynamic picture region in the to-be-adjusted region are processed respectively.

[0068] In one embodiment, the step includes: S401, dividing the to-be-adjusted region into a plurality of sub-regions; S402, if the difference between the first gray scale parameter and the second gray scale parameter of a target sub-region in the sub-region is greater than a preset threshold, determining the target sub-region as the dynamic picture region.

[0069] Specifically, the to-be-adjusted region is divided into a plurality of sub-regions, and each sub-region contains an arbitrary number of pixels. The division of the sub-regions can be the same as or different from the division of the zones in the above-mentioned embodiments. In addition, since the to-be-adjusted region is determined based on the Mura region, the edge contour of the to-be-adjusted region can be a regular pattern or not. Therefore, the shape and the number of pixels contained in different sub-regions can be the same or different, which is not limited in the embodiment.

[0070] An arbitrary sub-region is selected as a target sub-region. If the difference between the first gray scale parameter and the second gray scale parameter of the target sub-region is greater than a preset threshold, it indicates that the target sub-region has large change on the basis of the current display picture to the next frame. Therefore, the target sub-region is determined as the dynamic picture region.

[0071] S103, reducing the compensation value of the second gray scale parameter of the dynamic picture region in the to-be-adjusted region, and performing liquid crystal deflection compensation based on the compensation value after the reduction.

[0072] Specifically, the gray scale compensation value of the pixels in the to-be-adjusted region for Demura compensation is large. If the pixels in the to-be-adjusted region are compensated by Demura and OD, water marks will be formed. Therefore, the degree of brightness uneven compensation or liquid crystal deflection compensation of the pixels in the to-be-adjusted region is reduced, the conflict between the two is reduced, and the formation of water marks is avoided.

[0073] If the dynamic picture area in the to-be-adjusted area is switched to the next frame picture with large change on the basis of the current display picture, if Demura compensation is performed without OD compensation, even if the actual gray scale determined by Demura compensation can reach the same brightness as the target gray scale in theory, without OD compensation, the liquid crystal deflection cannot reach the degree corresponding to the actual gray scale, and the displayed brightness is still different from the brightness of the target gray scale in theory, that is, for the dynamic picture area in the to-be-adjusted area, the degree of reduction of the brightness unevenness compensation is preferentially selected to perform liquid crystal deflection compensation.

[0074] According to the target display gray scale of the second gray scale parameter and the preset brightness unevenness compensation mapping table, the next frame actual gray scale of the dynamic picture area is determined, the difference between the next frame actual gray scale and the target display gray scale is a compensation value of the brightness unevenness compensation, and the compensation value is reduced. According to the actual display gray scale of the first gray scale parameter, the target display gray scale after the compensation value is reduced, and the preset liquid crystal deflection compensation mapping table, the driving parameter of the dynamic picture area is determined. For example, the target display gray scale of the second gray scale parameter is L95, the next frame actual gray scale after the brightness unevenness compensation is L85, but the degree of reduction of the brightness unevenness compensation is determined, the target display gray scale after the compensation value is reduced is determined as L90, and the liquid crystal deflection compensation is performed based on L90.

[0075] In the preset liquid crystal deflection compensation mapping table, the corresponding pixel driving parameter can be determined based on the actual display gray scale and the target display gray scale, the liquid crystal deflection compensation mapping table is determined based on OD compensation debugging, and the embodiment is not limited specifically. In the preset brightness unevenness compensation mapping table, the target display gray scale and the actual display gray scale are one-to-one corresponding, after the next frame actual gray scale is determined, the driving parameter corresponding to the next frame actual gray scale can be determined by table lookup, the brightness unevenness compensation mapping table is determined based on Demura compensation debugging, and the embodiment is not limited specifically. The degree of reduction of the brightness unevenness compensation can be determined by debugging, and the embodiment is not limited specifically.

[0076] In one embodiment, the step includes: S501, determining the actual display gray scale of the current display picture of the dynamic picture area according to the first gray scale parameter; S502, determining the target display gray scale of the next frame picture of the dynamic picture area according to the second gray scale parameter; S503, determining the pixel driving parameter of the dynamic picture area according to the actual display gray scale, the target display gray scale, and the preset liquid crystal deflection compensation mapping table; and S504, displaying the target display gray scale by the pixel driving parameter.

[0077] Specifically, the gray scale compensation value of the pixel in the to-be-adjusted region for Demura compensation is large, and if the pixel in the to-be-adjusted region is compensated by both Demura compensation and OD compensation, water marks are formed, so the pixel in the to-be-adjusted region is compensated by only one of Demura compensation and OD compensation, thereby avoiding water marks caused by the conflict of the two compensations.

[0078] The actual display gray scale of the current display picture of the dynamic picture region is determined according to the first gray scale parameter, and the actual display gray scale is the gray scale of the current display picture of the dynamic picture region after Demura compensation and / or OD compensation. The target display gray scale of the next frame picture of the dynamic picture region is determined according to the second gray scale parameter, and the target display gray scale is the gray scale of the next frame picture of the dynamic picture region without Demura compensation and / or OD compensation.

[0079] According to the actual display gray scale, the target display gray scale, and a preset liquid crystal deflection compensation mapping table, a pixel driving parameter of the dynamic picture region is determined, and the pixel driving parameter is used to control the dynamic picture region to switch from the actual display gray scale to the target display gray scale, that is, the next frame dynamic picture region displays the target display gray scale of the to-be-displayed next frame picture without Demura compensation, and only based on OD compensation, the liquid crystal of the dynamic picture region is deflected to a deflection degree corresponding to the target display gray scale.

[0080] S104, the second gray scale parameter of the to-be-adjusted region other than the dynamic picture region is compensated for brightness unevenness, and liquid crystal deflection compensation is reduced.

[0081] Specifically, the gray scale compensation value of the pixel in the to-be-adjusted region for Demura compensation is large, and if the pixel in the to-be-adjusted region is compensated by both Demura compensation and OD compensation, water marks are formed, so the pixel in the to-be-adjusted region is compensated by only one of Demura compensation and OD compensation, thereby avoiding water marks caused by the conflict of the two compensations.

[0082] The dynamic picture region in the to-be-adjusted region has small changes when switching from the current display picture to the next frame picture, and the degree of liquid crystal deflection has little change, so even if OD compensation is not performed, the liquid crystal can be deflected to the corresponding degree, and Demura compensation can further improve the problem of brightness unevenness, so the brightness unevenness compensation is preferentially performed for the dynamic picture region in the to-be-adjusted region, and the liquid crystal deflection compensation is reduced.

[0083] According to the target display gray scale of the second gray scale parameter and the preset brightness uneven compensation mapping table, the next frame actual gray scale of the dynamic picture area is determined. According to the actual display gray scale of the first gray scale parameter, the next frame actual gray scale and the preset liquid crystal deflection compensation mapping table, the driving parameter of the next frame actual gray scale is determined to reduce the degree of liquid crystal deflection compensation. For example, the actual display gray scale of the first gray scale parameter is L95, the target display gray scale of the second gray scale parameter is L128, and the next frame actual gray scale after brightness uneven compensation is L120. The compensation value of the liquid crystal deflection compensation for switching L95 to L120 is D1, and the next frame actual gray scale L120 is reduced to L115, that is, the compensation value of the liquid crystal deflection compensation for switching L95 to L115 is determined, and the liquid crystal deflection compensation is reduced. The degree of reduction of the liquid crystal deflection compensation can be determined by debugging, and the embodiment is not limited in detail.

[0084] In one embodiment, the step includes: S601, determining the target display gray scale of the next frame picture of the dynamic picture area according to the second gray scale parameter; S602, determining the next frame actual gray scale of the dynamic picture area and the driving parameter corresponding to the next frame actual gray scale according to the target display gray scale and the preset brightness uneven compensation mapping table; and S603, controlling the dynamic picture area to display the next frame actual gray scale by the driving parameter corresponding to the next frame actual gray scale.

[0085] Specifically, the gray scale compensation value of the pixel in the to-be-adjusted region for Demura compensation is large, and if the pixel in the to-be-adjusted region is compensated by both Demura compensation and OD compensation, water marks are formed. Therefore, the pixel in the to-be-adjusted region is compensated by only one of Demura compensation and OD compensation, so as to avoid water marks caused by the conflict of the two compensations.

[0086] Since the dynamic picture area in the adjustment region does not perform liquid crystal deflection compensation, that is, the adjustment process does not involve the display parameter of the current display picture of the dynamic picture area. The target display gray scale of the next frame picture of the dynamic picture area is determined according to the second gray scale parameter, and the target display gray scale is the gray scale of the next frame picture of the dynamic picture area after not being compensated by Demura compensation and / or OD compensation.

[0087] According to the target display gray scale and the preset brightness uneven compensation mapping table, the next frame actual gray scale of the dynamic picture area and the driving parameter corresponding to the next frame actual gray scale are determined, and the dynamic picture area is controlled to display the next frame actual gray scale by the driving parameter corresponding to the next frame actual gray scale, that is, the next frame dynamic picture area displays the next frame actual gray scale of the to-be-displayed next frame picture after Demura compensation, but not OD compensation. The degree of liquid crystal deflection of the dynamic picture area can be the deflection degree corresponding to the next frame actual gray scale, or can be close to the deflection degree corresponding to the next frame actual gray scale.

[0088] The preset luminance uneven compensation mapping table is determined based on the target display gray scale and the actual display gray scale in a one-to-one correspondence. After the next frame actual gray scale is determined, the driving parameter corresponding to the next frame actual gray scale can be determined by looking up the table. The luminance uneven compensation mapping table is determined based on Demura compensation debugging, and the present embodiment is not limited in detail.

[0089] It should be noted that when one of the Demura compensation and the OD compensation is reduced, the detection function can be added in the Tcon to achieve the reduction, the Demura compensation value and the OD compensation value are set as default, or the corresponding compensation value is determined as 0, that is, the corresponding compensation is not actually performed.

[0090] In one embodiment, after the liquid crystal deflection compensation, the second gray scale parameter of the non-dynamic picture area in the to-be-adjusted area is subjected to luminance uneven compensation, and the second gray scale parameter of the non-to-be-adjusted area of the display panel is subjected to luminance uneven compensation and liquid crystal deflection compensation.

[0091] Specifically, the remaining area of the non-to-be-adjusted area of the display panel includes two types of areas. One type is a non-Mura area, that is, no Demura compensation is needed, or the gray scale after Demura compensation is consistent with the target gray scale. The other type is a Mura area, but the difference between the gray scale after Demura compensation and the target gray scale is small. Therefore, the second gray scale parameter of the non-to-be-adjusted area of the display panel is subjected to luminance uneven compensation and liquid crystal deflection compensation.

[0092] First, the next frame actual gray scale of the dynamic picture area is determined based on the target display gray scale according to the second gray scale parameter and the preset luminance uneven compensation mapping table (that is, Demura compensation is performed). Then, the pixel driving parameter of the dynamic picture area is determined based on the actual display gray scale of the first gray scale parameter, the next frame actual gray scale, and the preset liquid crystal deflection compensation mapping table (that is, OD compensation is performed). The pixel driving parameter is used to control the dynamic picture area to display the next frame actual gray scale, and the liquid crystal deflection degree of the dynamic picture area is the deflection degree corresponding to the next frame actual gray scale.

[0093] The Demura compensation or the OD compensation is only performed in the to-be-adjusted area, and conflict caused by simultaneous performance of the two is avoided to cause water marks. In addition, according to the first gray scale parameter of the current display picture and the second gray scale parameter of the next frame picture to be displayed, a dynamic picture area in which the next frame picture has a large gray scale change relative to the current display picture in the to-be-adjusted area is determined, the dynamic picture area in the to-be-adjusted area reduces the liquid crystal deflection compensation for ensuring the liquid crystal deflection degree, and the liquid crystal deflection degree of the non-dynamic picture area in the to-be-adjusted area changes little, and the second gray scale parameter reduces the liquid crystal deflection compensation for the uneven brightness compensation.

[0094] In order to better implement the display panel brightness adjustment method in the embodiments of the present application, on the basis of the display panel brightness adjustment method, the display panel brightness adjustment device in the embodiments of the present application further provides a display panel brightness adjustment device, as shown in Figure 4 The display panel brightness adjustment device 100 includes:

[0095] The information acquisition module 110 is configured to acquire a to-be-adjusted area of a display panel, a first gray scale parameter of a current display picture, and a second gray scale parameter of a next frame picture to be displayed.

[0096] The area analysis module 120 is in communication connection with the information acquisition module 110 and is configured to determine a dynamic picture area in the to-be-adjusted area according to the first gray scale parameter and the second gray scale parameter.

[0097] The brightness compensation module 130 is in communication connection with the area analysis module 120 and is configured to reduce a compensation value of uneven brightness compensation of the second gray scale parameter in the dynamic picture area in the to-be-adjusted area, and perform liquid crystal deflection compensation based on the compensation value after the reduction; and perform uneven brightness compensation on the second gray scale parameter in the non-dynamic picture area in the to-be-adjusted area, and reduce the liquid crystal deflection compensation.

[0098] In some embodiments, the brightness compensation module 130 is further configured to determine an actual display gray scale of the current display picture of the dynamic picture area according to the first gray scale parameter; determine a target display gray scale of the next frame picture of the dynamic picture area according to the second gray scale parameter; determine a pixel driving parameter of the dynamic picture area according to the actual display gray scale, the target display gray scale, and a preset liquid crystal deflection compensation mapping table; and control the dynamic picture area to display the target display gray scale through the pixel driving parameter.

[0099] In some embodiments, the luminance compensation module 130 is further configured to determine a target display gray scale of a next frame of the dynamic picture area according to the second gray scale parameter; determine a next frame actual gray scale of the dynamic picture area and a driving parameter corresponding to the next frame actual gray scale according to the target display gray scale and a preset luminance unevenness compensation mapping table; and control the dynamic picture area to display the next frame actual gray scale by using the driving parameter corresponding to the next frame actual gray scale.

[0100] In some embodiments, the information acquisition module 110 is further configured to divide the display area into a plurality of sub-areas; acquire a gray scale compensation value of each sub-area when displaying an arbitrary gray scale after luminance unevenness compensation; and determine a sub-area with a gray scale compensation value greater than a preset compensation value as the to-be-adjusted area.

[0101] In some embodiments, the luminance compensation module 130 is further configured to perform luminance unevenness compensation and liquid crystal deflection compensation on the second gray scale parameter of the display panel except for the to-be-adjusted area.

[0102] In some embodiments, the information acquisition module 110 is further configured to acquire a maximum gray scale compensation value of each sub-area when performing luminance unevenness compensation; and determine a sub-area with a maximum gray scale compensation value greater than a preset compensation value as the to-be-adjusted area.

[0103] In some embodiments, the area analysis module 120 is further configured to divide the to-be-adjusted area into a plurality of sub-areas; and determine a target sub-area as the dynamic picture area if a difference between the first gray scale parameter and the second gray scale parameter of the target sub-area is greater than a preset threshold.

[0104] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0105] In some embodiments of the present application, an electronic device is provided, which includes one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to execute the steps of the display panel luminance adjustment method described above by the processor. The steps of the display panel luminance adjustment method can be the steps in the display panel luminance adjustment method of each of the above embodiments.

[0106] In some embodiments of the present application, a storage medium is provided, in which a plurality of instructions are stored, and the instructions are used to control a controller to execute the method described in any of the above embodiments.

[0107] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradictions, it should be considered as the scope of the present disclosure.

[0108] The display panel brightness adjustment method, device, electronic equipment and storage medium provided by the embodiments of the present application are described in detail above, the principles and implementation manners of the present application are described by applying specific examples in this paper, and the above embodiment description is only used to help understand the method and core idea of the present application; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed, and according to the above, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A display panel brightness adjustment method, characterized by, The method comprises the following steps: dividing a display area of a display panel into a plurality of sub-areas; obtaining a gray scale compensation value when each of the sub-areas displays an arbitrary gray scale and compensates for luminance unevenness; determining a to-be-adjusted area as a sub-area whose gray scale compensation value is greater than a preset compensation value; obtaining a first gray scale parameter of a current display frame of the display panel and a second gray scale parameter of a next frame to be displayed; wherein the first gray scale parameter comprises a target gray scale parameter and an actual display gray scale of the current display frame, and the second gray scale parameter is a target gray scale parameter of the next frame; the target gray scale parameter is a target gray scale input into a time sequence controller electrically connected to the display panel, and the actual display gray scale is a gray scale after the target gray scale parameter is compensated for luminance unevenness and / or liquid crystal deflection; determining a dynamic picture area in the to-be-adjusted area according to the first gray scale parameter and the second gray scale parameter; wherein the dynamic picture area is an area in the to-be-adjusted area whose difference between the first gray scale parameter and the second gray scale parameter is greater than a preset threshold; reducing a compensation value of luminance unevenness compensation of the second gray scale parameter of the dynamic picture area in the to-be-adjusted area, and performing liquid crystal deflection compensation based on the compensation value after the reduction; performing luminance unevenness compensation on the second gray scale parameter of the non-dynamic picture area in the to-be-adjusted area, and reducing liquid crystal deflection compensation.

2. The display panel brightness adjustment method of claim 1, wherein, The method of reducing the compensation value of luminance unevenness compensation of the second gray scale parameter of the dynamic picture area in the to-be-adjusted area, and performing liquid crystal deflection compensation based on the compensation value after the reduction, comprises the following steps: determining an actual display gray scale of the current display frame of the dynamic picture area according to the first gray scale parameter; determining a target display gray scale of the next frame of the dynamic picture area according to the second gray scale parameter; determining a pixel driving parameter of the dynamic picture area according to the actual display gray scale, the target display gray scale, and a preset liquid crystal deflection compensation mapping table; controlling the dynamic picture area to display the target display gray scale through the pixel driving parameter.

3. The display panel brightness adjustment method of claim 1, wherein, The method of performing luminance unevenness compensation on the second gray scale parameter of the non-dynamic picture area in the to-be-adjusted area, and reducing liquid crystal deflection compensation, comprises the following steps: determining a target display gray scale of the next frame of the dynamic picture area according to the second gray scale parameter; determining a next frame actual gray scale of the dynamic picture area and a driving parameter corresponding to the next frame actual gray scale according to the target display gray scale and a preset luminance unevenness compensation mapping table; controlling the dynamic picture area to display the next frame actual gray scale through the driving parameter corresponding to the next frame actual gray scale.

4. The display panel brightness adjustment method of claim 1, wherein, After the method of performing luminance unevenness compensation on the second gray scale parameter of the non-dynamic picture area in the to-be-adjusted area, and reducing liquid crystal deflection compensation, the method further comprises the following step: performing luminance unevenness compensation and liquid crystal deflection compensation on the second gray scale parameter of the non-to-be-adjusted area of the display panel.

5. The display panel brightness adjustment method of claim 1, wherein, The method of determining the to-be-adjusted area as a sub-area whose gray scale compensation value is greater than a preset compensation value, comprises the following steps: obtaining a maximum gray scale compensation value when each of the sub-areas compensates for luminance unevenness according to the gray scale compensation value; The partition with the maximum gray scale compensation value greater than the preset compensation value is determined as the to-be-adjusted region.

6. The display panel brightness adjustment method of claim 1, wherein, The method further includes: dividing the to-be-adjusted region into a plurality of sub-regions; if a difference between the first gray scale parameter and the second gray scale parameter of a target sub-region in the sub-regions is greater than the preset threshold, determining the target sub-region as the dynamic picture region.

7. A display panel brightness adjustment device, characterized in that: The method further includes: an information acquisition module, configured to acquire a to-be-adjusted region of a display panel, a first gray scale parameter of a current display picture, and a second gray scale parameter of a next frame picture to be displayed; the to-be-adjusted region is determined according to a gray scale compensation value obtained by performing brightness unevenness compensation on any gray scale of each partition of the display region of the display panel after partitioning the display region of the display panel, and a preset compensation value; the first gray scale parameter includes a target gray scale parameter and an actual display gray scale of the current display picture, and the second gray scale parameter is a target gray scale parameter of the next frame picture; the target gray scale parameter is a target gray scale input into a timing controller electrically connected to the display panel, and the actual display gray scale is a gray scale after performing brightness unevenness compensation and / or liquid crystal deflection compensation on the target gray scale parameter; a region analysis module, in communication connection with the information acquisition module, configured to determine a dynamic picture region in the to-be-adjusted region according to the first gray scale parameter and the second gray scale parameter; the to-be-adjusted region is the partition with the gray scale compensation value greater than the preset compensation value; the dynamic picture region is a region in the to-be-adjusted region with a difference between the first gray scale parameter and the second gray scale parameter greater than a preset threshold; a brightness compensation module, in communication connection with the region analysis module, configured to reduce a compensation value of brightness unevenness compensation of the second gray scale parameter of the dynamic picture region in the to-be-adjusted region, and perform liquid crystal deflection compensation based on the reduced compensation value; and perform brightness unevenness compensation on the second gray scale parameter of a region other than the dynamic picture region in the to-be-adjusted region, and reduce liquid crystal deflection compensation.

8. An electronic device, comprising: The electronic device includes a processor, a memory, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the steps in the display panel brightness adjustment method of any one of claims 1 to 6.

9. A storage medium having stored therein a plurality of instructions, the plurality of instructions comprising: The instructions are used for a controller to implement the method of any one of claims 1 to 6.

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