Display panel and brightness compensation data determination method and brightness compensation method

Abstract

The application discloses a display panel and a brightness compensation data determination method and a brightness compensation method. The brightness compensation data determination method comprises the following steps: acquiring a brightness compensation data group corresponding to a first display sub-area of a display panel to be compensated in a local brushing frame, wherein the brightness compensation data group comprises brightness compensation data of at least two gears; in the local brushing frame, the first display sub-area does not perform picture refreshing, and a second display sub-area performs picture refreshing; acquiring a brightness difference between the first display sub-area and the second display sub-area in a set display picture in a partitioned multi-frequency display mode after the first display sub-area is compensated by the brightness compensation data of the at least one gear; and determining target brightness compensation data corresponding to the first display sub-area of the display panel to be compensated in the local brushing frame in the set display picture from the brightness compensation data group according to the brightness difference. The application can improve the brightness difference between the first display sub-area and the second display sub-area of the display panel in the partitioned multi-frequency display mode.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display panel, a method for determining brightness compensation data, and a brightness compensation method. Background Technology

[0002] With the development of display technology, users have increasingly higher requirements for display quality.

[0003] In existing technologies, the display effect is poor when multiple frequencies are displayed in different zones. Summary of the Invention

[0004] This invention provides a display panel, a method for determining brightness compensation data, and a brightness compensation method, which can improve the brightness difference in a multi-frequency display mode and enhance the display effect.

[0005] According to one aspect of the present invention, a method for determining brightness compensation data for a display panel is provided. The display panel to be compensated includes a first display sub-area and a second display sub-area. In a multi-frequency display mode with partitioned display, the refresh rate of the first display sub-area is lower than the refresh rate of the second display sub-area. The method includes:

[0006] Obtain the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated during frame refresh. The brightness compensation data group includes brightness compensation data at least two levels. During frame refresh, the first display sub-area does not refresh the screen, while the second display sub-area does refresh the screen.

[0007] After obtaining the brightness compensation data of the first display sub-area after at least one level, the brightness difference between the first display sub-area and the second display sub-area is obtained under the setting display screen of the multi-frequency display mode.

[0008] Based on the brightness difference, the target brightness compensation data corresponding to the local refresh frame of the first display sub-area of ​​the display panel to be compensated under the set display screen is determined from the brightness compensation data group.

[0009] Optionally, obtain the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated, based on the in-process frame refresh. The brightness compensation data group includes brightness compensation data for at least two levels, including:

[0010] The brightness compensation data of the third display sub-area corresponding to the setting of at least one set display screen in the multi-frequency display mode of multiple sample display panels are obtained respectively, and the brightness compensation data of at least two levels are formed into a brightness compensation data group; wherein, the sample display panel includes a third display sub-area and a fourth display sub-area, and the third display sub-area does not refresh the screen under the local refresh frame, while the fourth display sub-area refreshes the screen;

[0011] Optionally, the brightness compensation data is configured to minimize the brightness difference between the third and fourth display sub-areas of at least one sample display panel to a preset value;

[0012] Optionally, the third display sub-area corresponds to the position of the first display sub-area, and the fourth display sub-area corresponds to the position of the second display sub-area;

[0013] Optionally, the third display sub-area has the same refresh rate as the first display sub-area, and the fourth display sub-area has the same refresh rate as the second display sub-area;

[0014] Optionally, the display screen can include at least two screens;

[0015] Optionally, at least two display screens may have different refresh rates for their corresponding partitions; different refresh rates may include different refresh rates for the third display sub-area and / or different refresh rates for the fourth display sub-area.

[0016] Optionally, in the multi-frequency display mode, the brightness compensation data group is different when the refresh frequency of the third display sub-zone is different, and / or the refresh frequency of the fourth display sub-zone is different;

[0017] Optionally, at least two sample display panels, under the same settings display with the same partition refresh rate, have the same brightness compensation data for the third display sub-area; wherein, the same partition refresh rate includes the same refresh rate for the third display sub-area and the same refresh rate for the fourth display sub-area;

[0018] Optionally, at least two sample display panels may have different brightness compensation data for the third display sub-area when displaying the same screen with the same partition refresh rate.

[0019] Optionally, the display screen can be set to the brightness level and the grayscale display screen.

[0020] Optionally, the brightness compensation data sets for the display panel to be compensated may differ depending on the set display brightness level and / or set display grayscale.

[0021] Optionally, the brightness compensation data sets corresponding to the same brightness level and display grayscale settings may differ for the same display screen with different refresh rates for the first display sub-area and / or the second display sub-area with different refresh rates.

[0022] Optionally, the brightness compensation data sets corresponding to different brightness levels and / or different display grayscale settings for the same refresh rate for the first display sub-area and the same refresh rate for the second display sub-area are different.

[0023] Optionally, after obtaining the brightness compensation data of the first display sub-area after at least one level, the brightness difference between the first display sub-area and the second display sub-area under the setting display screen of the partition multi-frequency display mode includes: using the brightness compensation data in the brightness compensation data group corresponding to the same partition refresh rate, the same display brightness level and the same display grayscale as the setting display screen of the display panel to be compensated, to perform brightness compensation on the first display sub-area of ​​the display panel to be compensated.

[0024] Optionally, based on the brightness difference, the target brightness compensation data corresponding to the local refresh frame of the first display sub-area of ​​the display panel to be compensated under the set display screen is determined from the brightness compensation data group, including...

[0025] In the brightness compensation data group, the brightness compensation data whose corresponding brightness difference is less than the preset brightness threshold is determined as the target brightness compensation data.

[0026] Alternatively, the brightness compensation data corresponding to the smallest brightness difference in the brightness compensation data set can be determined as the target brightness compensation data.

[0027] Optionally, after acquiring brightness compensation data for the first display sub-area at least one level, before determining the brightness difference between the first and second display sub-areas in the multi-frequency display mode setting, the following steps are also included:

[0028] Preliminary compensation data is determined based on the brightness data of the display panel to be compensated under the non-zone multi-frequency display mode. In the non-zone multi-frequency display mode, the refresh rates of the first and second display sub-areas are the same. The preliminary compensation data is used to compensate for the uneven brightness under the non-zone multi-frequency display mode.

[0029] Optionally, after obtaining the brightness compensation data of the first display sub-area at least one level, the brightness difference between the first display sub-area and the second display sub-area under the setting display screen of the multi-frequency display mode includes:

[0030] On the same machine that has determined the initial compensation data, after the brightness compensation data of the first display sub-area has been compensated by at least one level in the first display sub-area, the brightness of the first and second display sub-areas under the setting display screen of the multi-frequency display mode is obtained;

[0031] The brightness difference is obtained based on the brightness of the first display sub-area and the second display sub-area;

[0032] Optionally, after determining the target brightness compensation data corresponding to the local refresh frame of the first display sub-area of ​​the display panel to be compensated under the set display screen based on the brightness difference from the brightness compensation data group, the method further includes: storing the target brightness compensation data on the same machine that determined the preliminary compensation data.

[0033] Optionally, the display panel includes multiple pixel circuits, each pixel circuit including a data writing module, a driving module, and a compensation module. The data writing module is connected to the data line and the first end of the driving module, respectively, and the compensation module is connected between the second end of the driving module and the control end.

[0034] The control terminal of the data writing module is connected to the first scan line, and the control terminal of the compensation module is connected to the second scan line. The data writing module is used to transmit the corresponding data voltage to the first terminal of the drive module during the data writing stage of the local and full scan frames according to the first scan signal on the first scan line. The compensation module is used to turn off during the local scan frame and turn on during the full scan frame according to the second scan signal on the second scan line.

[0035] Optionally, the brightness compensation data includes first compensation data for the data voltage; in the first display sub-area, the data writing module is used to transmit the data voltage after brightness compensation data compensation to the first end of the drive module during the data writing stage of the local refresh frame.

[0036] Preferably, in the second display sub-area, the data writing module is used to transmit the data voltage after preliminary data compensation to the first end of the drive module during the local frame data writing stage;

[0037] Preferably, in the first display sub-area and the second display sub-area, the data writing module is used to transmit the data voltage after preliminary compensation to the first end of the drive module during the full-frame data writing stage.

[0038] Optionally, the display panel includes multiple pixel circuits, each pixel circuit including a first initialization module and a driving module. The first initialization module is connected to a first initialization signal line and a first or second terminal of the driving module, respectively. The control terminal of the first initialization module is connected to a third scan line. The first initialization module is used to transmit a first initialization voltage on the first initialization signal line to the first or second terminal of the driving module during the first initialization phase of partial and full scan frames, based on the third scan signal on the third scan line.

[0039] Optionally, the brightness compensation data includes second compensation data for the first initialization voltage; in the first display sub-area, the first initialization module is used to transmit the first initialization voltage after compensation by the second compensation data to the first or second end of the drive module during the first initialization phase of the local refresh frame.

[0040] Optionally, the pixel circuit further includes a second initialization module, which is connected to the second terminal of the driving module and the second initialization signal line. The control terminal of the second initialization module is connected to the fourth scan line. The second initialization module is used to transmit the second initialization voltage on the second initialization signal line to the second terminal of the driving module during the second initialization stages of partial and full scan frames, according to the fourth scan signal on the fourth scan line.

[0041] Optionally, the brightness compensation data includes third compensation data for the second initialization voltage; in the first display sub-area, the second initialization module is used to transmit the second initialization voltage after compensation by the third compensation data to the second terminal of the drive module during the second initialization phase of the local refresh frame.

[0042] According to another aspect of the present invention, a brightness compensation method for a display panel is provided, comprising:

[0043] In the multi-frequency display mode of the display panel, the final compensation data corresponding to the first display sub-area is determined from the target brightness compensation data based at least on the refresh rates of the first and second display sub-areas in the display panel; wherein, the target brightness compensation data is determined using the brightness compensation data determination method described in any embodiment of the present invention;

[0044] During frame refresh, the final compensation data is used to perform brightness compensation on the first display sub-area.

[0045] According to another aspect of the present invention, a display panel is provided, wherein brightness compensation is performed using the brightness compensation method of the display panel described in any embodiment of the present invention.

[0046] The method for determining brightness compensation data for a display panel according to an embodiment of the present invention includes: acquiring a brightness compensation data set corresponding to a first display sub-area of ​​the display panel to be compensated during a local refresh frame; wherein, during a local refresh frame, the first display sub-area does not refresh the screen, while the second display sub-area does refresh the screen; based on the brightness difference between the first and second display sub-areas under a set display screen during a local refresh frame after the first display sub-area has undergone brightness compensation data of at least one level; and determining the target brightness compensation data corresponding to the first display sub-area of ​​the display panel to be compensated under the set display screen from the brightness compensation data set. This embodiment of the present invention, by pre-acquiring a brightness compensation data set and determining the target brightness compensation data for the first display sub-area of ​​different display panels to be compensated from the brightness compensation data set, can obtain the corresponding brightness compensation data for the display panel by performing panel tuning, thereby improving the brightness difference between the first and second display sub-areas of the display panel to be compensated. This avoids the problem that some display panels cannot be well compensated and the display effect cannot be effectively improved when the same set of compensation data is applied to different display panels.

[0047] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of a display panel.

[0050] Figure 2 This is a flowchart of a method for determining brightness compensation data for a display panel, provided in an embodiment of the present invention.

[0051] Figure 3 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention.

[0052] Figure 4 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention.

[0053] Figure 5 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention.

[0054] Figure 6 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention.

[0055] Figure 7 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention.

[0056] Figure 8 This is a schematic diagram of a pixel circuit provided in an embodiment of the present invention.

[0057] Figure 9 It is a timing diagram of a pixel circuit.

[0058] Figure 10 It is a display panel and its corresponding driver timing diagram.

[0059] Figure 11 This is a timing diagram of a pixel circuit provided in an embodiment of the present invention.

[0060] Figure 12This is a timing diagram of another pixel circuit provided in an embodiment of the present invention.

[0061] Figure 13 This is a flowchart of a brightness compensation method for a display panel provided in an embodiment of the present invention. Detailed Implementation

[0062] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0063] It should be noted that the terms "first," "second," etc., used in this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0064] To facilitate understanding of the embodiments of this application, this application first provides a detailed explanation of the problems existing in the related technologies:

[0065] With the development of the Organic Light-Emitting Diode (OLED) display panel industry, the materials for pixel display circuits have evolved from Low Temperature Polycrystalline Silicon (LTPS) to Low Temperature Polycrystalline Oxide (LTPO), with LTPO being optimized from version 1.0 to 2.0. Currently, terminal requirements for OLED display panel functionality are becoming increasingly stringent, and LTPO is transitioning from version 2.0 to 3.0. LTPO 3.0 primarily refers to partial refresh display, which uses a gate-in-the-pixel circuit (GIP circuit) to control the frame rate of certain display pixel circuits, achieving real-time control of different refresh rates in specific areas within the OLED display panel. Figure 1 This is a schematic diagram of a display panel structure, for reference. Figure 1The display panel 10 may include a first display sub-area 11 and a second display sub-area 12, and the refresh rates of the first display sub-area 11 and the second display sub-area 12 are different.

[0066] During the development of partial refresh display, many new display defects have emerged that urgently need to be addressed. Due to the different refresh rates of the first display sub-area 11 and the second display sub-area 12, and the different ratios of refresh time to hold time, there will be a difference in brightness between the first display sub-area 11 and the second display sub-area 12, which will affect the display effect of the display panel.

[0067] Therefore, embodiments of the present invention provide a method for determining brightness compensation data for a display panel, combined with Figure 1 The display panel includes at least two display sub-areas. In a multi-frequency display mode, the at least two display sub-areas refresh the image at different refresh rates. In a non-multi-frequency display mode, all display sub-areas refresh the image at the same refresh rate. Figure 1 As shown, the display panel to be compensated includes a first display sub-area 11 and a second display sub-area 12. In the multi-frequency display mode, the refresh rate of the first display sub-area 11 is lower than the refresh rate of the second display sub-area 12.

[0068] Figure 2 This is a flowchart of a method for determining brightness compensation data for a display panel according to an embodiment of the present invention, see reference. Figure 2 The methods for determining the brightness compensation data of the display panel include:

[0069] S110. Obtain the local frame refresh and the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated. The brightness compensation data group includes brightness compensation data at least two levels.

[0070] In a local refresh, the first display sub-region does not refresh its image, while the second display sub-region does. That is, in a local refresh, the pixel circuits in the first display sub-region do not write data voltage to the gate of the driving transistor; however, the pixel circuits in the second display sub-region do write data voltage to the gate of the driving transistor. In a full refresh, both the first and second display sub-regions refresh their images; that is, in a full refresh, the pixel circuits in both the first and second display sub-regions write data voltage to the gate of the driving transistor.

[0071] Among them, a partial refresh frame is a local refresh frame of the display panel to be compensated. Only a portion of the display panel to be compensated is refreshed. In a single frame, only a local area of ​​the image is updated, while the remaining area retains its original display state. (Reference) Figure 1 , Figure 1The display panel 10 can be a display panel to be compensated, which can be an OLED display panel. The display panel to be compensated includes a first display sub-region 11 and a second display sub-region 12, wherein the number of the first display sub-region 11 and the number of the second display sub-region 12 are both at least one. Figure 1 The example illustrates a display panel to be compensated, comprising two first display sub-areas 11 located on either side of a second display sub-area 12. The refresh rate of the first display sub-area 11 is lower than that of the second display sub-area 12. The first display sub-area 11 is a low refresh rate area, also known as a cold area. The second display sub-area is a high refresh rate area, also known as a hot area. During frame refresh, the first display sub-area 11 does not refresh the image, while the second display sub-area 12 does refresh the image.

[0072] Specifically, the brightness compensation data set corresponding to the first display sub-area of ​​the display panel to be compensated can be obtained through data collected in the laboratory and production line in the early stages. For example, multiple sample display panels can be tested to obtain brightness compensation data at least two levels that can compensate the brightness of the sample display panels, forming a brightness compensation data set. Each level of brightness compensation data can compensate the brightness of at least one sample display panel, and this brightness compensation data can be compensation data for the driving data provided by the intra-pixel circuit within the local refresh frame. For example, the brightness compensation data set includes brightness compensation data for the first level, the second level, and up to the Nth level, where N≥2, and N is a positive integer. Among the N levels of brightness compensation data, the higher the level, the longer the adjustment time, but the more precise the adjustment and the more uniform the display brightness.

[0073] S120. After the brightness compensation data of the first display sub-area has been compensated by at least one level, the brightness difference between the first display sub-area and the second display sub-area is obtained under the setting display screen of the multi-frequency display mode.

[0074] The display screen can be set to a fixed refresh rate, fixed brightness level, and fixed grayscale. The first sub-area of ​​the display panel to be compensated is compensated with at least one level of brightness compensation data. Each level of brightness compensation data compensates the same set display screen, which has the same refresh rate, brightness level, and grayscale. Each level of brightness compensation data, after compensating the first sub-area of ​​the display panel to be compensated, will result in a brightness difference between the first and second sub-areas of the display panel to be compensated. For example, by taking a picture of the compensated, partitioned refreshed display panel, the brightness difference of the display panel to be compensated corresponding to each level of brightness compensation data can be obtained. Simultaneously considering the differences in loading and brightness uniformity between different display panels, the brightness differences between different display panels can be comprehensively covered. By taking pictures of the partitioned refreshed display panels with different levels of brightness compensation data, the compensation effect corresponding to different levels of brightness compensation data can be accurately calculated, and the optimal result under all brightness compensation data can be determined.

[0075] S130. Based on the brightness difference, determine the target brightness compensation data corresponding to the local refresh frame of the first display sub-area of ​​the display panel to be compensated under the set display screen from the brightness compensation data group.

[0076] This process involves using brightness compensation data from each level of the brightness compensation data set to compensate the display panel to be compensated. The minimum brightness difference between the first and second display sub-areas of the panel is obtained. If the minimum value meets the brightness difference requirement of the display panel, the brightness compensation data corresponding to the minimum value is taken as the target brightness compensation data. Alternatively, a preset brightness threshold can be set. The first level of brightness compensation data is used to compensate the display panel. If the brightness difference is greater than the preset threshold, the next level of brightness compensation data is needed. If the brightness difference is less than the preset threshold, the brightness compensation data corresponding to the level where the difference is less than the preset threshold is taken as the target brightness compensation data. By pre-setting the brightness compensation data set and determining the target brightness compensation data for the first display sub-area of ​​different display panels within the set, the brightness difference between different display panels can be improved.

[0077] The method for determining brightness compensation data for a display panel provided by the technical solution of this invention includes: acquiring a brightness compensation data set corresponding to a first display sub-area of ​​the display panel to be compensated during a local frame refresh; wherein, during a local frame refresh, the first display sub-area does not refresh the screen, while the second display sub-area does refresh the screen; based on the brightness difference between the first and second display sub-areas under a set display screen of a local frame refresh after the first display sub-area has undergone at least one level of brightness compensation data compensation; and determining the target brightness compensation data corresponding to the first display sub-area of ​​the display panel to be compensated under a set display screen from the brightness compensation data set. This invention, by pre-acquiring a brightness compensation data set and determining the target brightness compensation data for the first display sub-area of ​​different display panels to be compensated from the brightness compensation data set, can improve the brightness difference between the first and second display sub-areas of the display panel to be compensated by performing panel tuning, thereby avoiding the problem that some display panels cannot be well compensated and the display effect cannot be effectively improved when the same set of compensation data is applied to different display panels.

[0078] Optionally, S110 can be further refined. Specifically, S110 includes: S111, acquiring the brightness compensation data of the third display sub-area corresponding to the setting display screen of multiple sample display panels under the local refresh frame, and forming a brightness compensation data group of at least two levels; wherein, under the local refresh frame, the sample display panel includes a third display sub-area and a fourth display sub-area, the third display sub-area does not perform screen refresh, and the fourth display sub-area performs screen refresh.

[0079] Based on the above embodiments, this invention also provides a method for determining brightness compensation data for a display panel. Figure 3 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention, see reference. Figure 3 The methods for determining the brightness compensation data of the display panel include:

[0080] S111. Obtain the brightness compensation data of the corresponding level of the third display sub-area under at least one set display screen of the multi-frequency display mode of multiple sample display panels, and form a brightness compensation data group of at least two levels; wherein, the sample display panel includes a third display sub-area and a fourth display sub-area, and under local refresh frame, the third display sub-area does not refresh the screen, while the fourth display sub-area refreshes the screen.

[0081] Among them, multiple sample display panels are set with the same set display screen, which is a display screen with the same partition refresh rate, the same display brightness level and the same display grayscale; the third display sub-area corresponds to the brightness compensation data of at least two levels obtained by pre-compensating the third display sub-area of ​​multiple sample display panels; the third display sub-area of ​​the sample display panel corresponds to the first display sub-area of ​​the display panel to be compensated, and the fourth display sub-area of ​​the sample display panel corresponds to the second display sub-area of ​​the display panel to be compensated. The brightness compensation data group formed by the brightness compensation data of at least two levels can be subsequently applied to the first display sub-area of ​​the display panel to be compensated.

[0082] For example, the brightness compensation data in the brightness compensation data set can improve the brightness difference between the third and fourth display sub-areas of all sample display panels. The brightness compensation data set includes brightness compensation data at the first level, brightness compensation data at the second level, and so on up to the Nth level. The brightness compensation data at the first level can make the brightness difference of some sample display panels among multiple sample display panels meet the requirements. The remaining sample display panels that do not meet the brightness difference requirements need to be compensated by the brightness compensation data at the second level until the brightness difference of all sample display panels meets the requirements. The obtained brightness compensation data at the N levels is the brightness compensation data set. The brightness compensation data at each level can improve the brightness difference of some sample display panels. In the brightness compensation data at the N levels, the higher the level, the longer the adjustment time will be, but the adjustment will be more precise and the display brightness will be more uniform.

[0083] S120. After the brightness compensation data of the first display sub-area has been compensated by at least one level, the brightness difference between the first display sub-area and the second display sub-area is obtained under the setting display screen of the multi-frequency display mode.

[0084] S130. Based on the brightness difference, determine the target brightness compensation data corresponding to the local refresh frame of the first display sub-area of ​​the display panel to be compensated under the set display screen from the brightness compensation data group.

[0085] Optionally, the brightness compensation data is configured to minimize the brightness difference between the third and fourth display sub-areas of at least one sample display panel to a preset value.

[0086] The preset value can be 1.5%. The brightness difference between the third and fourth display sub-areas is the ratio of the third display sub-area to the fourth display sub-area. When the ratio is less than the preset value, the brightness compensation data is to ensure that the brightness difference of at least one sample display panel meets the display requirements of the display panel.

[0087] Optionally, the third display sub-area corresponds to the position of the first display sub-area, and the fourth display sub-area corresponds to the position of the second display sub-area.

[0088] The third display sub-area corresponds to the first display sub-area, and the fourth display sub-area corresponds to the second display sub-area. This allows the third and first display sub-areas to be low refresh rate areas, and the fourth and second display sub-areas to be high refresh rate areas. By setting the display sub-areas of the sample display panel to correspond to the display sub-areas of the display panel to be compensated, the brightness compensation data obtained through the sample display panel can be applied to the display panel to be compensated, resulting in more accurate brightness compensation and better compensation effect.

[0089] Optionally, the third display sub-area has the same refresh rate as the first display sub-area, and the fourth display sub-area has the same refresh rate as the second display sub-area.

[0090] The third display sub-area has the same refresh rate as the first display sub-area, and the fourth display sub-area has the same refresh rate as the second display sub-area. This ensures that the refresh rate of the preset display screen in the brightness compensation data group corresponding to the third display sub-area obtained through the sample display panel is the same as the refresh rate of the display panel to be compensated. By controlling the screen refresh rate variable to be the same, the compensation effect when the obtained brightness compensation data group is applied to the display panel to be compensated is better.

[0091] Optionally, the display screen can include at least two screens.

[0092] The settings include at least two display screens, and at least two corresponding brightness compensation data points, which can achieve better compensation effects.

[0093] Preferably, at least two display screens have different refresh rates for their corresponding partitions; the different refresh rates for the partitions include different refresh rates for the third display sub-area and / or different refresh rates for the fourth display sub-area.

[0094] Among them, at least two display screens have different partition refresh rates, and the brightness compensation data sets corresponding to different partition refresh rates are different. Different partition refresh rates include different refresh rates corresponding to the third display sub-area, or different refresh rates corresponding to the fourth display sub-area, or different refresh rates corresponding to both the third and fourth display sub-areas. The above three situations correspond to different brightness compensation data sets. The multiple brightness compensation data sets obtained can make the compensation effect of the display screen of the display panel to be compensated better.

[0095] Optionally, in the multi-frequency display mode, the brightness compensation data group is different when the refresh frequency of the third display sub-zone is different, and / or the refresh frequency of the fourth display sub-zone is different.

[0096] In the multi-frequency display mode, when the refresh frequency of the third display sub-zone is different, and / or the refresh frequency of the fourth display sub-zone is different, the brightness compensation data group is different, the compensation data is more accurate, and a better compensation effect can be achieved.

[0097] Optionally, at least two sample display panels, under the same settings and with the same partition refresh rate, have identical brightness compensation data for the third display sub-zone. This includes both the same refresh rate for the third and fourth display sub-zones.

[0098] In this setting, at least two sample display panels have the same brightness compensation data corresponding to the third display sub-area. The same brightness compensation data forms a brightness compensation data in the brightness compensation data group, which is used to compensate the display panel to be compensated in the future, thereby improving the display effect of the display panel to be compensated.

[0099] Optionally, at least two sample display panels may have different brightness compensation data for the third display sub-zone when displaying the same screen with the same partition refresh rate.

[0100] In this setting, at least two sample display panels have different brightness compensation data corresponding to the third display sub-area. The different brightness compensation data form at least two levels of brightness compensation data in the brightness compensation data group, which are used to compensate the display panel to be compensated and improve the display effect of the display panel to be compensated.

[0101] Optionally, the display screen can be set to either the brightness level or the grayscale level.

[0102] The brightness compensation data set can be multiple. Different brightness compensation data sets can be obtained for the same refresh rate, the same set display brightness level, and different display grayscale. Different brightness compensation data sets can be obtained for the same refresh rate, different set display brightness level, and the same display grayscale. Different brightness compensation data sets can be obtained for different refresh rates, the same set display brightness level, and different display grayscale. In this way, obtaining multiple brightness compensation data sets can make the compensation effect of the display screen of the display panel to be compensated better.

[0103] Optionally, the brightness compensation data sets for the display panel to be compensated may differ depending on the set display brightness level and / or set display grayscale.

[0104] Different brightness levels and / or grayscale settings create different display images. Different display images correspond to different brightness compensation data sets, which makes the brightness compensation data of the display panel to be compensated more accurate and the compensation effect better.

[0105] Optionally, the brightness compensation data sets corresponding to the same brightness level and display grayscale settings may differ for the same display screen with different refresh rates for the first display sub-area and / or the second display sub-area with different refresh rates.

[0106] The different refresh rates of the first and / or second display sub-areas result in different display settings. Under the same brightness level and display grayscale, the corresponding brightness compensation data sets are different, which can make the brightness compensation data more accurate and improve the compensation effect of the display panel.

[0107] Optionally, the brightness compensation data sets corresponding to different brightness levels and / or different display grayscale settings for the same refresh rate for the first display sub-area and the same refresh rate for the second display sub-area are different.

[0108] Among them, the brightness compensation data sets corresponding to different brightness levels and / or different display grayscale settings are different for the same refresh rate in the first display sub-area and the same refresh rate in the second display sub-area. The different brightness compensation data sets can improve the compensation effect.

[0109] In some embodiments, the brightness compensation data sets corresponding to different brightness levels and / or different display grayscales under the setting display screen with the same refresh rate for the first display sub-area and the same refresh rate for the second display sub-area are the same.

[0110] Among them, the brightness compensation data groups corresponding to different brightness levels and / or different display grayscale settings of the first display sub-area with the same refresh rate and the second display sub-area with the same refresh rate are the same, which can reduce the amount of target brightness compensation data and reduce the storage space occupied.

[0111] Optionally, S120 can be further refined. S120 can be further refined as follows: S121, using the same refresh rate, same display brightness level and same display grayscale as the display panel to be compensated, the brightness compensation data in the brightness compensation data group corresponding to the display panel to be compensated is used to perform brightness compensation on the first display sub-area of ​​the display panel to be compensated.

[0112] Figure 4 This is a flowchart of a method for determining brightness compensation data for a display panel according to an embodiment of the present invention, see reference. Figure 4 The methods for determining the brightness compensation data of the display panel include:

[0113] S110. Obtain the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated during frame refresh. The brightness compensation data group includes brightness compensation data at least two levels. During frame refresh, the first display sub-area does not refresh the screen, while the second display sub-area does refresh the screen.

[0114] S121. Using the brightness compensation data from the brightness compensation data group corresponding to the same partition refresh rate, same display brightness level and same display grayscale as the display panel to be compensated, the brightness of the first display sub-area of ​​the display panel to be compensated is used to perform brightness compensation.

[0115] Specifically, the refresh rates of the same partitions are: the refresh rate of the first display sub-area of ​​the display panel to be compensated is the same as the refresh rate of the third display sub-area in the sample display panel; the refresh rate of the second display sub-area of ​​the display panel to be compensated is the same as the refresh rate of the fourth display sub-area in the sample display panel; the same display brightness level is: the display brightness level of the display panel to be compensated is the same as the display brightness level in the sample display panel; the same display grayscale is: the display grayscale of the display panel to be compensated is the same as the display grayscale in the sample display panel; the compensation data set used by the display panel to be compensated consists of multiple brightness compensation data sets corresponding to the same refresh rate, same display brightness level, and same display grayscale of the sample display panels, and at least two levels of brightness compensation data from the corresponding brightness compensation data set are used for compensation. Since the refresh rate, display brightness level, and display grayscale are all the same, a better compensation effect can be obtained.

[0116] S130. Based on the brightness difference, determine the target brightness compensation data corresponding to the local refresh frame of the first display sub-area of ​​the display panel to be compensated under the set display screen from the brightness compensation data group.

[0117] Optionally, S130 can be further refined, specifically including: S131, determining the brightness compensation data in the brightness compensation data group whose corresponding brightness difference is less than a preset brightness threshold as the target brightness compensation data; or, determining the brightness compensation data in the brightness compensation data group whose corresponding brightness difference is the smallest as the target brightness compensation data.

[0118] Based on the above embodiments, this invention also provides a method for determining brightness compensation data for a display panel. Figure 5 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention, see reference. Figure 5 The methods for determining the brightness compensation data of the display panel include:

[0119] S110. Obtain the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated during frame refresh. The brightness compensation data group includes brightness compensation data at least two levels. During frame refresh, the first display sub-area does not refresh the screen, while the second display sub-area does refresh the screen.

[0120] S120. After the brightness compensation data of the first display sub-area has been compensated by at least one level, the brightness difference between the first display sub-area and the second display sub-area is obtained under the setting display screen of the multi-frequency display mode.

[0121] S131. In the brightness compensation data group, the brightness compensation data whose corresponding brightness difference is less than the preset brightness threshold is determined as the target brightness compensation data; or, in the brightness compensation data group, the brightness compensation data corresponding to the smallest brightness difference is determined as the target brightness compensation data.

[0122] The process involves setting a preset brightness threshold. First, the brightness compensation data for the first level is used to compensate the display panel. If the brightness difference exceeds the preset threshold, the next level's brightness compensation data is used. If the brightness difference is less than the preset threshold, the brightness compensation data for that level is used as the target brightness compensation data. Alternatively, the brightness compensation data for each level in the brightness compensation data group can be used to compensate the display panel. The minimum brightness difference between the first and second display sub-areas of the panel is obtained. If this minimum difference meets the display panel's brightness difference requirements, the brightness compensation data corresponding to this minimum difference is determined as the target brightness compensation data. If the brightness compensation data for any level cannot meet the display panel's display needs, specialized repair is required.

[0123] Optional, Figure 6 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention, see reference. Figure 6 It also includes:

[0124] S110. Obtain the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated during frame refresh. The brightness compensation data group includes brightness compensation data at least two levels. During frame refresh, the first display sub-area does not refresh the screen, while the second display sub-area does refresh the screen.

[0125] S140. Determine preliminary compensation data based on the brightness data of the display panel to be compensated in the non-zone multi-frequency display mode.

[0126] In the non-zoned multi-frequency display mode, the refresh rates of the first and second display sub-areas are the same; preliminary compensation data is used to compensate for uneven brightness in the non-zoned multi-frequency display mode.

[0127] In the non-zone multi-frequency display mode, the first and second display sub-areas have the same refresh rate. During actual adjustment, because the mura of the display panel before compensation is severe, it is necessary to determine preliminary compensation data based on the brightness data of the display panel to be compensated in the non-zone multi-frequency display mode. This requires determining the preliminary compensation data for the first and second display sub-areas of the display panel to be compensated under the same refresh rate. Subsequently, in the non-zone multi-frequency display mode, brightness compensation is performed using the preliminary compensation data to eliminate demura.

[0128] S120. After the brightness compensation data of the first display sub-area has been compensated by at least one level, the brightness difference between the first display sub-area and the second display sub-area is obtained under the setting display screen of the multi-frequency display mode.

[0129] S130. Based on the brightness difference, determine the target brightness compensation data corresponding to the local refresh frame of the first display sub-area of ​​the display panel to be compensated under the set display screen from the brightness compensation data group.

[0130] Optionally, S120 can be further refined, specifically including: S121, on the same machine that determines the preliminary compensation data, obtaining the brightness of the first and second display sub-areas under the setting display screen of the multi-frequency display mode of the first display sub-area after the brightness compensation data of the first display sub-area has been compensated by at least one level; S122, obtaining the brightness difference based on the brightness of the first and second display sub-areas.

[0131] Figure 7 This is a flowchart of another method for determining brightness compensation data for a display panel provided in an embodiment of the present invention, see reference. Figure 7 The methods for determining the brightness compensation data of the display panel include:

[0132] S110. Obtain the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated during frame refresh. The brightness compensation data group includes brightness compensation data at least two levels. During frame refresh, the first display sub-area does not refresh the screen, while the second display sub-area does refresh the screen.

[0133] S140. Determine preliminary compensation data based on the brightness data of the display panel to be compensated under the display screen in the non-zone multi-frequency display mode; wherein, under the display screen in the non-zone multi-frequency display mode, the refresh rates of the first display sub-area and the second display sub-area are the same; the preliminary compensation data is used to compensate for the uneven brightness under the display screen in the non-zone multi-frequency display mode.

[0134] S121. On the same machine that determines the preliminary compensation data, obtain the brightness of the first and second display sub-areas under the setting display screen of the multi-frequency display mode of the partitioned display after the brightness compensation data of the first display sub-area has been compensated by at least one level.

[0135] In this process, after determining the initial compensation data for the display panel to be compensated, brightness compensation data from the brightness compensation data group corresponding to the same refresh rate, brightness level, and grayscale as the display panel with the same local refresh rate and display screen is used to perform brightness compensation on the first display sub-area of ​​the display panel. The compensated display panel can be photographed using a Demura machine. By comparing the brightness of the first and second display sub-areas under the local refresh rate setting display screen, the compensation effect corresponding to different brightness compensation data levels can be accurately calculated, and the optimal result under all brightness compensation data can be determined. Performing initial compensation on the first display sub-area of ​​the display panel to be compensated using the same machine that determined the initial compensation data allows for brightness compensation at the same location, eliminating the need to move the compensation position and simplifying the process.

[0136] Optionally, after determining the target brightness compensation data corresponding to the first display sub-area of ​​the display panel to be compensated in a local refresh frame under the set display screen, based on the brightness difference, the method further includes: storing the target brightness compensation data on the same machine that determined the preliminary compensation data. Thus, by writing at least one level of brightness compensation data at the Demura station, the brightness difference between the first and second display sub-areas of the display panel can be adjusted by writing different levels of brightness compensation data at the Demura station.

[0137] S122. Obtain the brightness difference based on the brightness of the first display sub-area and the second display sub-area.

[0138] The ratio of the brightness of the first display sub-area to the brightness of the second display sub-area is the brightness difference between the first display sub-area and the second display sub-area.

[0139] S130. Based on the brightness difference, determine the target brightness compensation data corresponding to the first display sub-area of ​​the display panel to be compensated under the set display screen from the brightness compensation data group.

[0140] Optional, Figure 8 This is a schematic diagram of a pixel circuit provided in an embodiment of the present invention, for reference. Figure 8The display panel includes multiple pixel circuits 20. Each pixel circuit 20 includes a data writing module 21, a driving module 22, and a compensation module 23. The data writing module 21 is connected to the data line Data and the first terminal S of the driving module 22. The compensation module 23 is connected between the second terminal D of the driving module 22 and the control terminal G.

[0141] The control terminal of the data writing module 21 is connected to the first scan line, and the control terminal of the compensation module 23 is connected to the second scan line. The data writing module 21 is used to transmit the corresponding data voltage Data to the first terminal S of the drive module 22 during the data writing stage of the local and full scan frames according to the first scan signal SP1 on the first scan line. The compensation module 23 is used to turn off during the local scan frame and turn on during the full scan frame according to the second scan signal SN2 on the second scan line.

[0142] The first scan signal SP1 can have a high refresh rate. Regardless of whether it's a partial or full refresh, the first scan signal SP1 always includes a low-level pulse. Each frame is refreshed from top to bottom. (Refer to...) Figure 1 The display panel can refresh from the upper first display sub-area 11 and the second display sub-area 12 to the lower first display sub-area 11. In each frame, the first terminal S and the second terminal D of the driving module 22 are charged by the data voltage Data. In this state, different data voltages Data result in different hysteresis effects in the driving module 22. For the pixel circuit in the first display sub-area 11, the second scan signal SN2 is connected to the gate of the compensation module 23. In a partial refresh frame, the second scan signal SN2 is low, the gate of the compensation module 23 in the first display sub-area 11 is low, the compensation module 23 is turned off, and the data voltage Data is written to the control terminal G of the driving module 22 at a low refresh rate. In a partial refresh frame, for the pixel circuit in the second display sub-area 12, the second scan signal SN2 includes a high-level pulse. In a partial refresh frame, when the gate of the compensation module 23 in the second display sub-area 12 is high, the compensation module 23 is turned on, and the data voltage Data is written to the control terminal G of the driving module 22 every frame at a high refresh rate to achieve partial refresh display.

[0143] Optional, see reference Figure 8 The brightness compensation data includes the first compensation data for the data voltage Data; in the first display sub-area, the data writing module 21 is used to transmit the data voltage Data after brightness compensation data to the first terminal S of the drive module 22 during the local refresh frame data writing stage.

[0144] Figure 9 This is a timing diagram for a pixel circuit, see reference. Figure 9In the prior art, during partial refresh, the start signal SinP1 serves as the input signal to the first scan driving circuit. The first scan driving circuit generates a first scan signal SP1 based on the start signal SinP1. The start signal SinP1 is equal to the refresh frequency of the second sub-display area 12. The first terminal S, i.e., the Source terminal, of the driving module 22 corresponding to the first display sub-area is in an open-circuit (Hiz) state. The partition control signal VrefE serves as the input signal to the second scan driving circuit. The second scan driving circuit generates a second scan signal SN2 based on the control signal VrefE. The VrefE voltage is related to the partial refresh range of the display panel. For example, Figure 10 It is a display panel and the corresponding driving timing diagram of the display panel. Referring to it 10, the high voltage of VrefE corresponds to the second display sub-area 12 (the high voltage of the partition control signal VrefE overlaps with the low-level pulse of the first scan signal connected to the data writing module in the second display sub-area 12), and the low voltage of VrefE corresponds to the first display sub-area (the low voltage of the partition control signal VrefE overlaps with the low-level pulse of the first scan signal connected to the data writing module in the first display sub-area 11).

[0145] For example, the second display sub-area 12 uses a 120Hz refresh rate, while the first display sub-area 11 uses a 1Hz refresh rate. Due to the different refresh rates, the charging phase and driving module characteristics of the first display sub-area 11 and the second display sub-area 12 are different, resulting in a brightness difference between the first display sub-area 11 and the second display sub-area 12 on the display panel. In the multi-frequency display mode, during normal refresh, the data voltage of the first display sub-area 11 will affect the voltage of the first and second terminals of the driving module, thereby affecting the source-drain bias and hysteresis state of the driving module, the on state of the driving module, and ultimately the brightness of the light-emitting module and the brightness of the first display sub-area. Figure 11 This is a timing diagram of a pixel circuit provided in an embodiment of the present invention, for reference. Figure 11The starting signal SinP1 serves as the input signal to the first scan driving circuit. The first scan driving circuit generates a first scan signal SP1 based on the starting signal SinP1. The starting signal SinP1 is equal to the refresh frequency of the second sub-display area 12. The first terminal S of the driving module 22 corresponding to the first display sub-area compensates for the data voltage written to the first terminal S, adjusting the data voltage to an appropriate voltage. This voltage differs from the prior art where the Source terminal is in an open-circuit (Hiz) state. This can change the hysteresis state of the driving module 22 corresponding to the first display sub-area 11. When a full refresh is performed, the voltage Cst changes accordingly, adjusting the brightness of the first display sub-area to match that of the second display sub-area, thus improving the brightness difference between the first and second display sub-areas. In other words, in this embodiment, by setting brightness compensation data including first compensation data for the data voltage Data, that is, by compensating the data voltage within a local refresh frame of multi-frequency partitioned display, the hysteresis state of the driving module during multi-frequency partitioned display can be changed, thereby compensating for the luminous brightness and reducing the brightness difference between the first and second display sub-areas.

[0146] In some embodiments, the data voltage Data corresponding to the pixel circuit in the first display sub-area during the data writing phase of a partial refresh frame and the data writing phase of a full refresh frame may be different; the data voltage Data corresponding to the pixel circuit in the second display sub-area during the data writing phase of a partial refresh frame and the data writing phase of a full refresh frame may be the same. Specifically, the data voltage Data corresponding to the pixel circuit in the first display sub-area during the data writing phase of a full refresh frame corresponds to the display grayscale; the data voltage Data corresponding to the pixel circuit in the second display sub-area during both the partial refresh frame and the full refresh frame data writing phases corresponds to the display grayscale.

[0147] Optional, see reference Figure 1 and Figure 8 In the second display sub-area 12, the data writing module 21 is used to transmit the data voltage after preliminary compensation to the first terminal S of the drive module 22 during the local frame data writing stage.

[0148] In the second display sub-area 12, the data writing module 21 is used to transmit the data voltage after preliminary compensation to the first terminal S of the drive module 22 during the local frame data writing stage. It can compensate the brightness of the second display sub-area 12 according to the preliminary compensation data, improve the brightness unevenness of the second display sub-area, and improve the display effect.

[0149] Optional, see reference Figure 1 and Figure 8 In the first display sub-area 11 and the second display sub-area 12, the data writing module 21 is used to transmit the data voltage after preliminary compensation to the first terminal S of the drive module 22 during the full-frame data writing stage.

[0150] In the first display sub-area 11 and the second display sub-area 12, the data writing module 21 transmits the data voltage after preliminary compensation to the first terminal S of the driving module 22 during the full-frame data writing stage. The brightness of the first display sub-area 11 and the second display sub-area 12 is compensated according to the preliminary compensation data, which can improve the uneven brightness of the first display sub-area 11 and the second display sub-area 12 and improve the display effect.

[0151] Optional, see reference Figure 8 The display panel includes multiple pixel circuits 20. Each pixel circuit 20 includes a first initialization module 24 and a driving module 22. The first initialization module 24 is connected to a first initialization signal line and a first terminal S or a second terminal D of the driving module 22. The control terminal of the first initialization module 24 is connected to a third scan line. The first initialization module 24 is used to transmit the first initialization voltage on the first initialization signal line to the first terminal or the second terminal of the driving module 22 during the first initialization stage of the partial and full scan frames, according to the third scan signal SP2 on the third scan line.

[0152] Optionally, the brightness compensation data includes second compensation data for the first initialization voltage; in the first display sub-area, the first initialization module is used to transmit the first initialization voltage after compensation by the second compensation data to the first or second end of the drive module during the first initialization phase of the local refresh frame.

[0153] Optionally, the pixel circuit 20 further includes a second initialization module 25, which is connected to the second terminal D and the second initialization signal line of the driving module 22. The control terminal of the second initialization module 25 is connected to the fourth scan line. The second initialization module 25 is used to transmit the second initialization voltage on the second initialization signal line to the second terminal of the driving module 22 in the second initialization stage of the local and full scan frames according to the fourth scan signal SN1 on the fourth scan line.

[0154] Optionally, the brightness compensation data includes third compensation data for the second initialization voltage; in the first display sub-area, the second initialization module is used to transmit the second initialization voltage after compensation by the third compensation data to the second terminal of the drive module during the second initialization phase of the local refresh frame.

[0155] The first initialization module 24 is used to initialize the first terminal S or the second terminal D of the driver module 22. Figure 12 This is a timing diagram of another pixel circuit provided in an embodiment of the present invention, for reference. Figure 12The display brightness of the first display sub-area is adjusted by compensating for the negative voltage Vrefn1 of the second initialization module 25 corresponding to the first display sub-area of ​​the local refresh frame and the positive voltage Vrefp of the first initialization module 24 corresponding to the first display sub-area of ​​the local refresh frame. This is achieved by adjusting Vrefn1 and Vrefp to make the reset state of the first display sub-area different from that of the second display sub-area, thereby adjusting the display brightness of the first display sub-area. In this embodiment, by setting brightness compensation data including second compensation data for the first initialization voltage or third compensation data for the second initialization voltage, that is, by compensating for the initialization voltage within the local refresh frame of the multi-frequency display, the hysteresis state of the driving module during multi-frequency display can be changed, thereby compensating for the luminous brightness and reducing the brightness difference between the first and second display sub-areas.

[0156] This invention provides a brightness compensation method for a display panel based on the above embodiments. Figure 13 This is a flowchart of a brightness compensation method for a display panel provided in an embodiment of the present invention, see reference. Figure 13 The compensation methods include:

[0157] S210. In the mode of multi-frequency display of the display panel, the final compensation data corresponding to the first display sub-area is determined from the target brightness compensation data based at least on the refresh frequency of the first display sub-area and the second display sub-area in the display panel; wherein the target brightness compensation data is determined by the brightness compensation data determination method described in any embodiment of the present invention.

[0158] The display panel has corresponding target brightness compensation data for each first and second display sub-area, each display brightness level, and each display grayscale. At the Demura station, the target brightness compensation data corresponding to different display settings (such as different partition refresh rates, different display brightness levels, or different display grayscales) can be written to the display panel and stored in the corresponding registers. By writing different target brightness compensation data at the Demura station, the final brightness compensation data can be determined from the target brightness compensation data according to the target display image during subsequent driving, and the brightness difference between each first and second display sub-area in the display panel can be adjusted.

[0159] Based on the refresh rates and corresponding brightness levels of the first and second display sub-areas corresponding to the target display image on the display panel, the target compensation data corresponding to the first display sub-area under the set display image that is closest to the target display image is determined as the final compensation data. In some embodiments, the target compensation data corresponding to the first display sub-area under the set display image that is the same as the target display image (same partition refresh rate, same brightness level, and same grayscale) is used as the final compensation data.

[0160] S220, refresh the frame locally, and use the final compensation data to perform brightness compensation on the first display sub-area.

[0161] Among them, using the final compensation data to perform brightness compensation on the first display sub-area can fully cover the brightness difference between the first and second display sub-areas of different display panels.

[0162] The brightness compensation method for the display panel provided in the embodiments of the present invention and the brightness compensation data determination method for the display panel described in any embodiment of the present invention have the same beneficial effects.

[0163] Based on the above embodiments, the present invention also provides a display panel, which uses the brightness compensation method of the display panel described in any embodiment of the present invention for brightness compensation.

[0164] The display panel provided in the embodiments of the present invention and the brightness compensation method of the display panel described in any embodiment of the present invention have the same beneficial effects.

[0165] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0166] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining brightness compensation data for a display panel, characterized in that, The display panel to be compensated includes a first display sub-area and a second display sub-area. In the multi-frequency display mode, the refresh rate of the first display sub-area is lower than the refresh rate of the second display sub-area. The method for determining the brightness compensation data includes: Obtain the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated during the local frame refresh. The brightness compensation data group includes brightness compensation data at least two levels. During the local frame refresh, the first display sub-area does not refresh the screen, while the second display sub-area does refresh the screen. After the brightness compensation data of the first display sub-area is obtained through at least one level, the brightness difference between the first display sub-area and the second display sub-area is obtained under the set display screen of the partition multi-frequency display mode. Based on the brightness difference, the target brightness compensation data of the first display sub-area of ​​the display panel to be compensated in the local refresh frame is determined from the brightness compensation data group under the set display screen. The process of acquiring the local frame rate and the brightness compensation data group corresponding to the first display sub-area of ​​the display panel to be compensated, wherein the brightness compensation data group includes brightness compensation data at least two levels, including: The brightness compensation data of the third display sub-area corresponding to the setting level of the multi-frequency display mode of the multiple sample display panels are obtained respectively, and the brightness compensation data of at least two levels are formed into the brightness compensation data group; wherein, the sample display panel includes a third display sub-area and a fourth display sub-area, and under the local refresh frame, the third display sub-area does not refresh the screen, while the fourth display sub-area refreshes the screen; The brightness compensation data in the brightness compensation data group is used to improve the brightness difference between the third and fourth display sub-areas of the sample display panel.

2. The method for determining brightness compensation data according to claim 1, characterized in that, The brightness compensation data is configured to minimize the brightness difference between the third and fourth display sub-areas of at least one sample display panel by a preset value.

3. The method for determining brightness compensation data according to claim 1, characterized in that, The third display sub-area corresponds to the position of the first display sub-area, and the fourth display sub-area corresponds to the position of the second display sub-area.

4. The method for determining brightness compensation data according to claim 1, characterized in that, The third display sub-area has the same refresh rate as the first display sub-area, and the fourth display sub-area has the same refresh rate as the second display sub-area.

5. The method for determining brightness compensation data according to claim 1, characterized in that, The settings display screen includes at least two.

6. The method for determining brightness compensation data according to claim 5, characterized in that, At least two of the specified display screens have different refresh rates for their corresponding partitions; the different refresh rates include different refresh rates for the third display sub-area and / or different refresh rates for the fourth display sub-area.

7. The method for determining brightness compensation data according to claim 1, characterized in that, In the multi-frequency display mode, the brightness compensation data group is different when the refresh frequency corresponding to the third display sub-area is different, and / or the refresh frequency corresponding to the fourth display sub-area is different.

8. The method for determining brightness compensation data according to claim 1, characterized in that, At least two sample display panels, under the same set display screen with the same partition refresh rate, have the same brightness compensation data corresponding to the third display sub-area; wherein, the same partition refresh rate includes the same refresh rate of the third display sub-area and the same refresh rate of the fourth display sub-area.

9. The method for determining brightness compensation data according to claim 1, characterized in that, At least two sample display panels, under the same set display screen with the same partition refresh rate, have different brightness compensation data for the third display sub-area.

10. The method for determining brightness compensation data according to claim 1, characterized in that, The set display screen refers to the display screen under the set display brightness level and set display grayscale.

11. The method for determining brightness compensation data according to claim 1, characterized in that, The brightness compensation data sets corresponding to the set display images with different set display brightness levels and / or different set display grayscale are different for the display panel to be compensated.

12. The method for determining brightness compensation data according to claim 1, characterized in that, The brightness compensation data sets corresponding to the same brightness level and display grayscale settings are different for the first display sub-area with different refresh rates and / or the second display sub-area with different refresh rates.

13. The method for determining brightness compensation data according to claim 1, characterized in that, The brightness compensation data sets corresponding to different brightness levels and / or different display grayscale settings are different for the first display sub-area with the same refresh rate and the second display sub-area with the same refresh rate.

14. The method for determining brightness compensation data according to claim 1, characterized in that, The brightness difference between the first display sub-area and the second display sub-area after the first display sub-area has undergone brightness compensation data of at least one level, under the set display screen of the multi-frequency display mode, includes: The brightness compensation data is obtained from the brightness compensation data group corresponding to the same partition refresh rate, same display brightness level and same display grayscale as the set display screen of the display panel to be compensated, and the brightness compensation is performed on the first display sub-area of ​​the display panel to be compensated.

15. The method for determining brightness compensation data according to claim 1, characterized in that, The step of determining, based on the brightness difference, the target brightness compensation data for the first display sub-area of ​​the display panel to be compensated in the local refresh frame under the set display screen, from the brightness compensation data group, includes: The brightness compensation data in the brightness compensation data group that corresponds to a brightness difference less than a preset brightness threshold is determined as the target brightness compensation data; Alternatively, the brightness compensation data corresponding to the smallest brightness difference in the brightness compensation data group can be determined as the target brightness compensation data.

16. The method for determining brightness compensation data according to claim 1, characterized in that, Before the brightness difference between the first display sub-area and the second display sub-area is determined under the setting display screen of the multi-frequency display mode after obtaining the brightness compensation data of the first display sub-area at least one level, the method further includes: Preliminary compensation data is determined based on the brightness data of the display panel to be compensated under the display screen in the non-zone multi-frequency display mode; wherein, under the display screen in the non-zone multi-frequency display mode, the refresh rates of the first display sub-area and the second display sub-area are the same; the preliminary compensation data is used to compensate for the uneven brightness under the display screen in the non-zone multi-frequency display mode.

17. The method for determining brightness compensation data according to claim 16, characterized in that, The brightness difference between the first display sub-area and the second display sub-area after the first display sub-area has undergone brightness compensation data of at least one level, under the set display screen of the multi-frequency display mode, includes: On the same machine that determines the preliminary compensation data, the brightness of the first display sub-area and the second display sub-area is obtained under the setting display screen of the partition multi-frequency display mode after the brightness compensation data of the first display sub-area has been compensated by at least one level; The brightness difference is obtained based on the brightness of the first display sub-area and the second display sub-area.

18. The method for determining brightness compensation data according to claim 17, characterized in that, The step of determining the target brightness compensation data of the first display sub-area of ​​the display panel to be compensated under the set display screen based on the brightness difference from the brightness compensation data group further includes: storing the target brightness compensation data on the same machine that determined the preliminary compensation data.

19. The method for determining brightness compensation data according to claim 16, characterized in that, The display panel includes multiple pixel circuits, each pixel circuit including a data writing module, a driving module, and a compensation module. The data writing module is connected to a data line and a first end of the driving module, and the compensation module is connected between a second end of the driving module and a control end. The control terminal of the data writing module is connected to the first scan line, and the control terminal of the compensation module is connected to the second scan line. The data writing module is used to transmit the corresponding data voltage to the first terminal of the driving module during the data writing phase of the local and full scan frames according to the first scan signal on the first scan line. The compensation module is used to turn off in the local scan frame and turn on in the full scan frame according to the second scan signal on the second scan line.

20. The method for determining brightness compensation data according to claim 19, characterized in that, The brightness compensation data includes first compensation data for the data voltage; in the first display sub-area, the data writing module is used to transmit the data voltage after being compensated by the brightness compensation data to the first end of the driving module during the data writing stage of the local refresh frame.

21. The method for determining brightness compensation data according to claim 19, characterized in that, In the second display sub-area, the data writing module is used to transmit the data voltage after the preliminary compensation data to the first end of the drive module during the data writing stage of the local refresh frame.

22. The method for determining brightness compensation data according to claim 19, characterized in that, In the first display sub-area and the second display sub-area, the data writing module is used to transmit the data voltage after the preliminary compensation data to the first end of the drive module during the data writing stage of the full refresh frame.

23. The method for determining brightness compensation data according to claim 1, characterized in that, The display panel includes multiple pixel circuits, each pixel circuit including a first initialization module and a driving module. The first initialization module is connected to a first initialization signal line and a first or second end of the driving module. The control end of the first initialization module is connected to a third scan line. The first initialization module is used to transmit a first initialization voltage on the first initialization signal line to the first or second end of the driving module during the first initialization phase of the partial and full refresh frames, based on the third scan signal on the third scan line.

24. The method for determining brightness compensation data according to claim 23, characterized in that, The brightness compensation data includes second compensation data for the first initialization voltage; in the first display sub-area, the first initialization module is used to transmit the first initialization voltage after compensation by the second compensation data to the first or second end of the driving module during the first initialization phase of the local refresh frame.

25. The method for determining brightness compensation data according to claim 23, characterized in that, The pixel circuit further includes a second initialization module, which is connected to the second terminal of the driving module and the second initialization signal line. The control terminal of the second initialization module is connected to the fourth scan line. The second initialization module is used to transmit the second initialization voltage on the second initialization signal line to the second terminal of the driving module during the second initialization stage of the local and full scan frames, according to the fourth scan signal on the fourth scan line.

26. The method for determining brightness compensation data according to claim 25, characterized in that, The brightness compensation data includes third compensation data for the second initialization voltage; in the first display sub-area, the second initialization module is used to transmit the second initialization voltage after compensation by the third compensation data to the second end of the driving module during the second initialization phase of the local refresh frame.

27. A brightness compensation method for a display panel, characterized in that, include: In the multi-frequency display mode of the display panel, the final compensation data corresponding to the first display sub-area is determined from the target brightness compensation data based at least on the refresh rates of the first and second display sub-areas in the display panel; wherein the target brightness compensation data is determined using the brightness compensation data determination method according to any one of claims 1-26; During frame refresh, the brightness of the first display sub-area is compensated using the final compensation data.

28. A display panel, characterized in that, Brightness compensation is performed using the brightness compensation method for the display panel as described in claim 27.

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