Compensation method and device of display panel, equipment and storage medium

Abstract

The embodiment of the invention provides a display panel compensation method and device, equipment and a storage medium, and the method comprises the steps: obtaining N to-be-compensated regions of a display panel, and determining the N to-be-compensated regions based on a target scanning time sequence and a display blanking region of the display panel, the target scanning time sequence comprises at least one of a first scanning time sequence and a second scanning time sequence, the first scanning time sequence is used for reset scanning of sub-pixels in the display panel, and the second scanning time sequence is used for offset adjustment scanning of a driving module in the sub-pixels; when the display panel performs picture display with each gray scale value under different brightness levels, first brightness parameter deviations between the N to-be-compensated areas and a normal area of the display panel are obtained respectively; and determining a target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and performing brightness compensation on the N to-be-compensated areas based on the target brightness compensation parameter. According to the embodiment of the invention, uniform display of brightness can be fully realized.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular, relates to a compensation method, device, equipment and storage medium for a display panel. Background Art

[0002] With the rapid development of display technology, new display panels such as organic light emitting diode (OLED) display panels and micro light emitting diode (micro LED) display panels are emerging in an endless stream, and full-screen display has become a development trend for mobile display devices such as mobile phones. However, the inventors of this application have found that the current display panels are prone to uneven brightness in some scenarios, which results in poor display effects of the display panels. Summary of the invention

[0003] The embodiments of the present application provide a compensation method, device and storage medium for a display panel, which can more fully achieve uniformity of display brightness, thereby effectively improving the display effect of the display panel.

[0004] In a first aspect, an embodiment of the present application provides a compensation method for a display panel, and the compensation method for a display panel includes:

[0005] Acquire N areas to be compensated of the display panel, where the N areas to be compensated are determined based on a target scanning timing and a display blanking area of ​​the display panel, where N is a positive integer, and the target scanning timing includes at least one of a first scanning timing and a second scanning timing, where the first scanning timing is used for a reset scan of a sub-pixel in the display panel, and the second scanning timing is used for a bias adjustment scan of a driving module in the sub-pixel;

[0006] When the display panel displays images at various grayscale values ​​at different brightness levels, first brightness parameter deviations between the N areas to be compensated and a normal area of ​​the display panel are respectively obtained;

[0007] Based on the first brightness parameter deviation, a target brightness compensation parameter of the display panel is determined, and brightness compensation is performed on the N to-be-compensated areas based on the target brightness compensation parameter.

[0008] Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a compensation device for a display panel, the compensation device for a display panel comprising:

[0009] A first acquisition module is used to acquire N areas to be compensated of the display panel, where the N areas to be compensated are determined based on a target scanning timing and a display blanking area of ​​the display panel, where N is a positive integer, and the target scanning timing includes at least one of a first scanning timing and a second scanning timing, where the first scanning timing is used for a reset scan of a sub-pixel in the display panel, and the second scanning timing is used for a bias adjustment scan of a driving module in the sub-pixel;

[0010] A second acquisition module is used to respectively acquire first brightness parameter deviations between N areas to be compensated and a normal area of ​​the display panel when the display panel displays images at various grayscale values ​​at different brightness levels;

[0011] The first compensation module is used to determine a target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and perform brightness compensation on N areas to be compensated based on the target brightness compensation parameter.

[0012] Based on the same inventive concept, in the third aspect, an embodiment of the present application provides an electronic device, the electronic device comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the display panel compensation method provided in the first aspect are implemented.

[0013] Based on the same inventive concept, in a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the compensation method for the display panel provided in the first aspect are implemented.

[0014] It can be seen from the above description that the compensation method, device, equipment and storage medium of a display panel provided in the embodiment of the present application obtain N areas to be compensated of the display panel, and the N areas to be compensated are determined based on the target scanning timing and the display blanking area of ​​the display panel. The target scanning timing includes at least one of the first scanning timing and the second scanning timing. The first scanning timing is used for the reset scanning of the sub-pixel in the display panel, and the second scanning timing is used for the bias adjustment scanning of the driving module in the sub-pixel. Then, when the display panel displays the picture at each grayscale value under different brightness levels, the first brightness parameter deviation between the N areas to be compensated and the normal area of ​​the display panel is obtained respectively. In this way, based on the above-mentioned first brightness parameter deviation, the target brightness compensation parameter of the display panel is determined, and the brightness compensation of the N areas to be compensated is performed based on the target brightness compensation parameter. A compensation method, device, equipment and storage medium of a display panel in the embodiment of the present application determines the area to be compensated based on the target scanning timing and the display blanking area, and then measures the first brightness parameter deviation between the area to be compensated and the normal area in the display panel. In this way, the target brightness compensation parameter of the area to be compensated in the display panel can be determined according to the brightness deviation. In this way, in actual display work, even if the load in the display area changes due to the existence of the display blanking area, thereby affecting the sub-pixel reset degree and / or the bias adjustment degree, the dark line distribution of the display panel can be effectively alleviated by performing targeted brightness compensation on the area to be compensated, thereby fully realizing the uniformity of the panel display brightness, thereby effectively improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 is a schematic diagram of the structure of a sub-pixel provided in an embodiment of the present application;

[0017] Figure 2 is a schematic diagram of a sub-pixel scanning situation provided in an embodiment of the present application;

[0018] Figure 3 is a schematic diagram of another sub-pixel scanning situation provided in an embodiment of the present application;

[0019] Figure 4 is a flow chart of a compensation method for a display panel provided in an embodiment of the present application;

[0020] Figure 5 is a schematic diagram of the structure of another sub-pixel provided in an embodiment of the present application;

[0021] Figure 6 is a schematic diagram of the structure of another sub-pixel provided in an embodiment of the present application;

[0022] Figure 7 is a timing diagram of a first scanning signal line and a second scanning signal line provided in an embodiment of the present application;

[0023] Figure 8 is a flow chart of another compensation method for a display panel provided in an embodiment of the present application;

[0024] Fig. 9 is a flow chart of another compensation method for a display panel provided in an embodiment of the present application;

[0025] Fig.10 is a flow chart of another compensation method for a display panel provided in an embodiment of the present application;

[0026] Fig.11 is a flow chart of another compensation method for a display panel provided in an embodiment of the present application;

[0027] Fig.12 is a flow chart of another compensation method for a display panel provided in an embodiment of the present application;

[0028] Fig.13 is a structural schematic diagram of a display panel provided in an embodiment of the present application;

[0029] Fig.14 is a schematic diagram of reset voltage compensation provided by an embodiment of the present application;

[0030] Fig.15 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0031] Fig.16 is a schematic diagram of bias voltage compensation provided in an embodiment of the present application;

[0032] Fig.17 is a schematic structural diagram of a compensation device for a display panel provided in an embodiment of the present application;

[0033] Fig.18 It is a schematic diagram of the structure of a compensation device for a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0036] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] It should be noted that the transistor in the embodiment of the present application can be an N-type transistor or a P-type transistor. For an N-type transistor, the on-level is a high level and the off-level is a low level. That is, when the gate of the N-type transistor is at a high level, the first and second poles thereof are connected, and when the gate of the N-type transistor is at a low level, the first and second poles thereof are disconnected. For a P-type transistor, the on-level is a low level and the off-level is a high level. That is, when the control terminal of the P-type transistor is at a low level, the first and second poles thereof are connected, and when the control terminal of the P-type transistor is at a high level, the first and second poles thereof are disconnected. In a specific implementation, the gate of each of the above-mentioned transistors is used as its control electrode, and, according to the signal of the gate of each transistor and its type, the first pole thereof can be used as the source and the second pole as the drain, or the first pole thereof can be used as the drain and the second pole as the source, and no distinction is made here. In addition, the on-level and the off-level in the embodiment of the present invention are both general terms, and the on-level refers to any level that can turn on the transistor, and the off-level refers to any level that can turn off / turn off the transistor.

[0038] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0039] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0040] Before elaborating on the technical solution provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art: due to the existence of a display blanking area in the display panel, there are differences in the internal load of the display panel under different display stages, resulting in inconsistent initialization levels of the light-emitting device and / or inconsistent bias adjustment levels of the threshold voltage Vth of the driving module, which causes dark lines to appear on the display panel and causes the screen to be split.

[0041] Specifically, in actual display panel display, the pixel circuit generally outputs a driving current to drive the light-emitting element to emit light, so that the display device can achieve the purpose of displaying the picture. When the pixel circuit drives the light-emitting element to emit light, the potential of the control end of the driving module in the pixel circuit may be greater than the potential of the second end of the driving module. Such a setting for a long time will cause the threshold voltage Vth of the driving module to shift, thereby affecting the driving current flowing into the light-emitting element, causing flickering and other problems.

[0042] Figure 1 is a circuit diagram of a pixel circuit. Figure 1 As shown, in order to improve the offset problem of the threshold voltage Vth of the driving module, a bias adjustment module can be added to the pixel circuit. The control end of the bias adjustment module is electrically connected to the scanning signal line, the first end of the bias adjustment module is electrically connected to the bias voltage end, and the second end of the bias adjustment module is electrically connected to the first end of the driving module. The bias voltage on the bias voltage end originates from the display driving chip. Under the control of the scanning signal line, the bias adjustment module is turned on to transmit the bias voltage of the bias voltage end to the first end of the driving module. Since the driving module is turned on, the bias voltage of the bias voltage end will be transmitted to the second end of the driving module through the driving module, so that the potential of the second end of the driving module is higher than or equal to the potential of the control end of the driving module, thereby adjusting the offset state of the threshold voltage Vth of the driving module.

[0043] like Figure 1 As shown, the pixel circuit may further include a reset module, and the reset module and the bias adjustment module may be controlled by the scanning signal line together, or may be controlled by different scanning signal lines respectively. The control end of the reset module may be electrically connected to the scanning signal line, and the first end of the reset module may be electrically connected to the reset voltage end, and the bias voltage on the bias voltage end is derived from the display driver chip. The second end of the reset module may be electrically connected to the first pole of the light-emitting element D, and the reset module is used to initialize the first pole of the light-emitting element D, so as to facilitate timely removal of residual charge of the first pole of the light-emitting device to avoid image residue or artifacts.

[0044] In order to better adjust the offset state of the threshold voltage Vth of the driving module, the scanning signal provided by the same scanning signal line can usually include multiple enable levels within a picture refresh cycle. That is, within a picture refresh cycle, the bias adjustment module can be turned on multiple times to adjust the offset state of the threshold voltage Vth of the driving module. Since the reset module and the bias adjustment module are controlled by the scanning signal line together, the reset module is also turned on multiple times within a picture refresh cycle / image frame to initialize the first pole of the light-emitting element D multiple times. The above-mentioned scanning signal line can provide scanning signals for one or more rows of pixel circuits.

[0045] See below Figure 2 and Figure 3 , both show the influence of the display blanking area in the display panel on the in-plane load of the display panel in different display stages. A plurality of rows of pixel circuits are arranged in the display area of ​​the display panel, and the scanning signal provided by the scanning signal line in a picture refresh cycle includes a plurality of valid pulses. When the scanning signal is a valid pulse, the bias adjustment module and the reset module in the corresponding row of pixel circuits are respectively turned on in response to the pulse signal of the scanning signal, and the offset state of the threshold voltage Vth of the driving module is adjusted and the first pole of the light-emitting element D is initialized.

[0046] For example, in a picture refresh cycle, the scan signal provided by the same scan signal line includes three effective pulses (used to provide an enable level): pulse a, pulse b and pulse c. For example, a pulse width may correspond to the scanning time of 30 rows of pixel circuits. A picture refresh cycle includes an active phase and a blanking phase. The display panel includes a display active area Vactive area and a display blanking area Vblank area / porch area. After the pixel circuit works stably, Figure 2 Pulse a, pulse b and pulse c in the middle scanning signal are all in the Vactive area, which is equivalent to initializing the first pole of the light-emitting element D in three first area 01 pixel circuits in the Vactive area. For example, the load in the display area at this time is the load corresponding to 90 rows of pixel circuits.

[0047] like Figure 3 As shown, as time goes by, pulses a, b and c of the scanning signal move downward, and a pulse of the scanning signal (such as pulse a) will enter the Vblank area, resulting in only two pixel circuits of the second area 02 in the Vactive area to initialize the first pole of the light-emitting element D. For example, at this time, the load in the display area is the load corresponding to 60 rows of pixel circuits. This results in different numbers of pixel rows being effectively scanned in the Vactive area in different time periods, resulting in different loads in the display panel. When pulses a, b and c all provide enable levels for the pixel rows in the Vactive area, the number of pixel rows corresponding to the in-plane load is 90 rows. When any of pulses a, b and c scans to the Vblank area, the number of pixel rows corresponding to the in-plane load is reduced, so that the reset voltage received by the pixel circuit changes from negative pressure to more negative, and the bias voltage changes from positive pressure to more positive, resulting in dim brightness at the second area 02, resulting in a split screen problem of the display panel.

[0048] In view of the above research findings of the inventors, in order to solve the problems of the prior art, the embodiments of the present application provide a compensation method, device, equipment and storage medium for a display panel. It should be noted that the embodiments provided in the present application are not intended to limit the scope of the present application.

[0049] The following is an introduction to the compensation method of the display panel provided in the embodiment of the present application.

[0050] First see Figure 4 , Figure 4This is a flow chart of a method for driving a display panel provided in an embodiment of the present application. The display panel may be an AMOLED (Active-Matrix Organic Light-Emitting Diode), an OLED or other. Those skilled in the art should understand that in other implementations of the present application, the display panel may also be a micro light-emitting diode display panel, a quantum dot display panel, etc.

[0051] S410, obtaining N areas to be compensated of the display panel, where the N areas to be compensated are determined based on a target scanning timing and a display blanking area of ​​the display panel, where N is a positive integer, and the target scanning timing includes at least one of a first scanning timing and a second scanning timing, where the first scanning timing is used for a reset scan of a sub-pixel in the display panel, and the second scanning timing is used for a bias adjustment scan of a driving module in the sub-pixel;

[0052] S420, when the display panel displays images at various grayscale values ​​at different brightness levels, respectively obtaining first brightness parameter deviations between N areas to be compensated and a normal area of ​​the display panel;

[0053] S430 , determining a target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and performing brightness compensation on N areas to be compensated based on the target brightness compensation parameter.

[0054] The specific implementation of the above steps 410 to 430 is described in detail below.

[0055] In S410, as can be seen from the above description, the display panel performs multiple reset compensation or bias voltage compensation in one image frame. When the display panel performs reset compensation or bias voltage compensation in a specific area, the load in the specific area changes due to the existence of the vblank area / porch area, thereby causing voltage fluctuations, which causes brightness deviation in the specific area, resulting in a split screen phenomenon.

[0056] Based on this, the target scanning timing of the display panel is predetermined in the present application. The target scanning timing includes at least one of a first scanning timing and a second scanning timing. The first scanning timing is used for the reset scanning of the sub-pixels in the display panel, and the second scanning timing is used for the bias adjustment scanning of the driving module in the sub-pixels. The reset scanning and the bias adjustment scanning can be set synchronously as described above, or they can be set asynchronously.

[0057] Different display panels may use different scanning timings, which may result in uneven brightness and darkness in the actual display panel, such as the three-split display panel described above. Alternatively, in some other embodiments, the display panel may also have two-split screens, four-split screens, etc. depending on the scanning timing, which is not strictly limited here.

[0058] Next, according to the target scanning timing and display blanking area of ​​the display panel, N areas to be compensated of the display panel can be determined. The N areas to be compensated can be, for example, the areas of the display panel where dark lines are obviously present, that is, Figure 3 In the two second areas 02, the dark pattern area is actually associated with the target scanning timing of the display panel and the display blanking area.

[0059] When the number of scan pulses in the target scan sequence is different, the position and number of the areas to be compensated are different. When there are differences in the display blanking area, it is easy to affect the column width of each area to be compensated. Therefore, when determining the area to be compensated in the early stage, it is necessary to comprehensively consider the target scan sequence and the information of the display blanking area.

[0060] In some more specific embodiments of the present application, Figure 5 As shown, the display panel includes a plurality of sub-pixels arranged in an array, the plurality of sub-pixels include a pixel circuit and a light-emitting device D, and the pixel circuit includes a reset module 102 .

[0061] The control end of the reset module 102 is electrically connected to the first scan signal line S1 , the first end of the reset module 102 is electrically connected to the corresponding reset voltage end vref1 , and the second end of the reset module 102 is electrically connected to the corresponding light emitting device D.

[0062] The first scanning timing is the scanning timing of the first scanning signal line S1.

[0063] like Figure 5 As shown, this embodiment introduces the origin of the first scanning timing of the display panel. The pixel circuit may include a reset module 102. In the reset stage of the pixel circuit, the reset module 102 is turned on under the control of the first scanning signal line S1, and the reset voltage provided by the reset voltage terminal vref1 is transmitted to the second end of the reset module 102, thereby initializing the light-emitting device D, so as to facilitate timely removal of residual charges in the light-emitting device D and avoid image retention or artifacts. In one image frame, the first scanning signal line S1 may include multiple enable levels / valid pulses. That is, in one image frame, the reset module 102 may be turned on multiple times to initialize the light-emitting device.

[0064] The scanning timing of the first scanning signal line S1 is the first scanning timing. The first scanning signal line S1 can provide scanning signals for pixel circuits in multiple rows of sub-pixels.

[0065] It should be added that, when the second end of the reset module 102 is electrically connected to the light emitting device D, it can be electrically connected to the first electrode of the light emitting device D, such as an anode, so as to more effectively adjust the initialization of the light emitting device D. The light emitting element D is, for example, an organic light emitting diode (OLED), a quantum dot light emitting diode (QLED), a micro light emitting diode (Micro LED), etc.

[0066] For more specific embodiments of this application, please refer to Figure 5 The above pixel circuit includes a driving module 101 and a bias adjustment module 103.

[0067] The driving module 101 is used to drive the light emitting device D to emit light.

[0068] The control end of the bias adjustment module 103 is electrically connected to the second scan signal line S2 , the first end of the bias adjustment module 103 is electrically connected to the corresponding bias voltage end vref2 , and the second end of the bias adjustment module 103 is electrically connected to the first end or the second end of the driving module 101 .

[0069] The second scanning timing is the scanning timing of the second scanning signal line S2.

[0070] As shown in the figure, this embodiment introduces the origin of the second scanning timing of the display panel. When the light-emitting element D is driven to emit light, the potential of the control end of the driving module 101 may be greater than the potential of the first end or the second end of the driving module 101. Such a setting for a long time will cause the ion polarization inside the driving module 101, resulting in the shift of the threshold voltage Vth of the driving module 101, thereby affecting the driving current flowing into the light-emitting element D and causing poor light-emitting display effect.

[0071] Based on this, in order to improve the threshold voltage offset problem of the driving module 101, the present embodiment introduces the bias adjustment module 103. Thus, in the bias stage of the pixel circuit, the bias adjustment module 103 is turned on under the control of the second scanning signal line S2, and the bias voltage provided by the bias voltage terminal vref2 is transmitted to the second terminal of the bias adjustment module 103, thereby adjusting the potential of the first terminal or the second terminal of the driving module 101, and further adjusting the offset state of the threshold voltage Vth of the driving module 101.

[0072] In this embodiment, the scanning timing of the second scanning signal line S2 is the second scanning timing, and the second scanning signal line S2 can provide scanning signals for the pixel circuits in one or more rows of sub-pixels. For example, when the pixel circuits in the i-th row of sub-pixels adjust the bias voltage of the driving module in response to the enable level of the second scanning signal line S2, the pixel circuits in other rows connected to the i-th row of pixel circuits on the same second scanning signal line S2 can also adjust the bias state of the corresponding driving module 101 in response to the enable level thereof. Wherein, i is a positive integer.

[0073] Furthermore, in order to fully reduce the number of signal lines and improve the signal line multiplexing rate, such as Figure 6 As shown, the first scanning signal line S1 is multiplexed into the second scanning signal line S2. The first scanning timing is the same as the second scanning timing.

[0074] In this embodiment, the reset module 102 and the bias adjustment module 103 in the same pixel circuit can be controlled by the same first scanning signal line S1 or the same second scanning signal line S2, and the reset phase coincides with the bias adjustment phase, thereby achieving full utilization of the scanning signal lines in the display panel.

[0075] According to some embodiments of the present application, optionally, one picture frame of the display panel includes a display effective area and a display blanking area. The N areas to be compensated include a plurality of pixel rows.

[0076] The pixel behavior in the N areas to be compensated is: when the effective level of the target scanning timing is scanned to the display blanking area, the pixel row in the display effective area that receives the effective level of the target scanning timing.

[0077] In this embodiment, the pixel rows in the N areas to be compensated are further limited and described. That is, the pixel rows to be compensated are actually: when the enable level of the target scan sequence exists in the display blanking area, the pixel rows in the display effective area receive the enable level of the target scan sequence.

[0078] The pixel rows to be compensated have load changes in the display area due to the presence of the display blanking area, resulting in fluctuations in the reset voltage and bias voltage, which affects the initialization degree of the light-emitting element and the bias adjustment degree of the driving module, and finally dark lines appear in the display panel, resulting in screen splitting. Therefore, this part of the pixel rows is the pixel rows that need to be compensated for brightness in the display effective area, and the area where this part of the pixel rows is located is the area to be compensated.

[0079] According to some embodiments of the present application, optionally, the first scanning timing is the same as the second scanning timing. In one image frame, the number of valid pulses in the first scanning timing or the second scanning timing is N+1.

[0080] In this embodiment, the first scanning timing is the same as the second scanning timing. The reset scanning of the sub-pixel in the display panel and the bias adjustment scanning timing of the driving module in the sub-pixel are synchronized. In this case, there are N areas to be compensated in the display panel, and the number of effective pulses in the first scanning timing or the second scanning timing is N+1. This embodiment shows the relationship between the number of effective pulses in the scanning timing and the number of areas to be compensated.

[0081] For example, Figure 7 As shown, in an image frame, if the number of valid pulses in the first scanning sequence or the second scanning sequence is 3, two dark stripe areas will appear in the display panel, that is, the number of areas to be compensated is 2, resulting in the aforementioned three-screen display on the display panel. For another example, if the number of valid pulses in the first scanning sequence or the second scanning sequence is 2, one dark stripe area will appear in the display panel, that is, the number of areas to be compensated is 1, and the display panel will appear two-screen display.

[0082] In S420, when the display panel displays images at various grayscale values ​​at different brightness levels, first brightness parameter deviations between N areas to be compensated and a normal area of ​​the display panel are respectively obtained.

[0083] In the field of display technology, the distribution of grayscale values ​​will be different at different brightness levels. The brightness level refers to the actual brightness level that the display panel can output, which determines the actual brightness output range of the display panel. The higher the brightness level, the stronger the contrast between light and dark that the display panel can display, and the richer the layering of the image. There are multiple grayscales at different brightness levels. The higher the grayscale, the more delicate the brightness changes that the display panel can present.

[0084] In this embodiment, when the display panel displays images at various grayscale values ​​at different brightness levels, for example, at grayscale 128 at low brightness level or at grayscale 255 at high brightness level, a brightness test is performed between the area to be compensated and the normal area of ​​the display panel, thereby obtaining a first brightness parameter deviation between the area to be compensated and the normal area. The first brightness parameter deviation measured at different grayscale values ​​at different brightness levels may be different. The above-mentioned grayscale values ​​may be specified grayscale binding point values, or may be selected according to actual test requirements.

[0085] When testing the brightness, the present application can use an image acquisition system to capture an image of the display panel and combine software analysis to evaluate the brightness distribution, thereby obtaining the brightness parameters of the area to be compensated and the normal area. In this way, by calculating the brightness difference between the area to be compensated and the normal area, the first brightness parameter deviation is obtained. Alternatively, in some other embodiments, the brightness deviation can also be measured using a brightness meter, a spectroradiometer, etc., which is not strictly limited here.

[0086] It should be added that when collecting the brightness of the area to be compensated, the brightness of each pixel in the area to be compensated can be collected and then the average brightness of the area can be calculated, or the central pixel can be selected and its brightness can be used as the brightness of the area to be compensated. The brightness test of the normal area is similar and will not be described here.

[0087] S430 , determining a target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and performing brightness compensation on N areas to be compensated based on the target brightness compensation parameter.

[0088] In this embodiment, after obtaining the first brightness parameter deviation, the target brightness compensation parameter of the area to be compensated in the display panel can be determined according to the brightness deviation. In this way, brightness compensation is performed on the area to be compensated in actual display work, which can effectively alleviate the distribution of dark lines on the display panel, thereby facilitating the improvement of display uniformity and visual effects.

[0089] According to some embodiments of the present application, optionally, after determining a target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and performing brightness compensation on N to-be-compensated areas based on the target brightness compensation parameter, as follows: Figure 8 As shown, the compensation method of the display panel also includes the following cyclic steps:

[0090] S440, when the target brightness compensation parameter is used to perform brightness compensation on the N areas to be compensated, when the display panel displays at the target grayscale value under the target brightness level, obtaining a second brightness parameter deviation between the N areas to be compensated and the normal area;

[0091] S450, when the second brightness parameter deviation exceeds the preset deviation threshold, the target brightness compensation parameter is adjusted based on the second brightness parameter deviation to obtain an updated target brightness compensation parameter, and jump to S440 until the second brightness parameter deviation corresponding to the updated target brightness compensation parameter is less than or equal to the preset deviation threshold.

[0092] In this embodiment, in order to fully improve the brightness compensation accuracy of the area to be compensated, after the brightness compensation is performed on the N areas to be compensated based on the target brightness compensation parameter, the second brightness parameter deviation between the N areas to be compensated and the normal area is tested and calculated again when the display panel is displayed at the target grayscale value under the target brightness level, to determine the improvement of the brightness of the area to be compensated after compensation. Among them, the target brightness level and the target grayscale value can be selected as needed, and the target brightness level and the target grayscale value can be one or more.

[0093] If a significant brightness deviation is found between the area to be compensated and the normal area during the re-test, the target brightness compensation parameter is further adjusted for the second time. During the second adjustment, the updated target brightness compensation parameter can be determined based on the newly measured second brightness parameter deviation.

[0094] By analogy, the area to be compensated continues to be compensated according to the updated target brightness compensation parameters, and then the second brightness parameter deviation between the area to be compensated and the normal area is tested until the second brightness parameter deviation is less than or equal to the preset deviation threshold. In this case, it can be considered that the compensation effect of the area to be compensated is good, and then the display brightness compensation is performed according to the corresponding target brightness compensation parameters. In other words, this embodiment actually first obtains the target brightness compensation parameters of the area to be compensated in the initial version through the brightness deviation between the split-screen area to be compensated and the normal area, and finally confirms the visual effect and brightness based on the compensation of the area to be compensated with the initial target brightness compensation parameters, and continuously debugs to finally obtain the best target brightness compensation parameters.

[0095] It should be noted that the above-mentioned preset deviation threshold may be, for example, 0.5 nit. The preset deviation threshold may be flexibly set according to panel design indicators and user requirements, and the present application does not impose strict restrictions on this.

[0096] According to some embodiments of the present application, optionally, Fig. 9 As shown, the above step 430, based on the first brightness parameter deviation, determines the target brightness compensation parameter of the display panel, and performs brightness compensation on the N areas to be compensated based on the target brightness compensation parameter, specifically includes:

[0097] S431, determining target gamma compensation parameters corresponding to respective grayscale values ​​of N areas to be compensated at different brightness levels based on the first brightness parameter deviation;

[0098] S432: Perform brightness compensation on the N areas to be compensated based on the target gamma compensation parameters.

[0099] In this way, it is specifically defined that the target gamma compensation parameters corresponding to the respective grayscale values ​​at different brightness levels are determined according to the first brightness parameter deviation, so that the brightness compensation of the N to-be-compensated areas is achieved through gamma compensation.

[0100] More specifically, optionally, the N to-be-compensated areas include a plurality of sub-pixels. Before brightness compensation is performed on the N to-be-compensated areas based on the target gamma compensation parameter, as follows: Fig.10 As shown, the compensation method of the display panel also includes:

[0101] S460, when grayscale information corresponding to the picture to be displayed is obtained, determining the grayscale value of each sub-pixel in the N areas to be compensated according to the grayscale information;

[0102] The above S432, based on the target gamma compensation parameter, performs brightness compensation on the N areas to be compensated, can be replaced by:

[0103] S433 , based on the target gamma compensation parameter, respectively perform brightness compensation on the grayscale value of each sub-pixel in the N areas to be compensated.

[0104] In this embodiment, in order to more accurately realize the brightness compensation of each area to be compensated during the actual panel display operation, the required gamma compensation parameters can be determined according to the grayscale value of each sub-pixel in the area to be compensated. In this way, point-to-point accurate compensation can be realized for the grayscale values ​​of different sub-pixels, avoiding the use of a single compensation parameter when the sub-pixels in the area to be compensated display different images, thereby affecting the compensation effect.

[0105] It should be added that, in actual work, the above-mentioned picture to be displayed can be the content or image to be displayed by the display panel, such as an application interface, etc. In the early stage of brightness testing, the picture to be displayed can refer to a specific pattern or a single color picture for testing and calibration, so as to measure and evaluate the brightness deviation.

[0106] According to some embodiments of the present application, optionally, Fig.11 As shown, the above S433, based on the target gamma compensation parameter, performs brightness compensation on the grayscale value of each sub-pixel in the N areas to be compensated, can be further replaced by:

[0107] S434, based on the current brightness level of the display panel and the grayscale value of each sub-pixel in the N to-be-compensated areas, determine the brightness compensation value corresponding to each sub-pixel in the N to-be-compensated areas from the target gamma compensation parameter;

[0108] S435 , performing brightness compensation on the grayscale values ​​of the sub-pixels in the N areas to be compensated based on the brightness compensation values ​​corresponding to the sub-pixels in the N areas to be compensated.

[0109] In this embodiment, the actual brightness level of the current display panel and the grayscale value of each sub-pixel in the area to be compensated are combined to determine the brightness compensation values ​​corresponding to each sub-pixel in the area to be compensated at different brightness levels according to the target gamma compensation parameter.

[0110] In this way, the sub-pixels in the area to be compensated have corresponding brightness compensation values ​​at different brightness levels and grayscale values. After the grayscale value of the sub-pixel is compensated, it is converted into a corresponding data voltage and transmitted to the pixel circuit, so that the sub-pixel emits light according to the compensated grayscale value, thus achieving accurate gamma compensation for the sub-pixels in the area to be compensated.

[0111] According to some embodiments of the present application, optionally, Fig.12 As shown, the compensation method of the display panel also includes:

[0112] S1210, in a target voltage change period within an image frame, measuring and obtaining a target voltage change parameter of a target voltage terminal, where the target voltage terminal is used to provide a target voltage to a sub-pixel in a target stage, and the target voltage is associated with the luminous brightness of the sub-pixel in the display panel; the target voltage change period is a period in which there is a virtual pixel row in the target stage in the display blanking area;

[0113] S1220, determining a dynamic voltage compensation amount corresponding to the target voltage terminal during the target voltage change period based on the target voltage change parameter;

[0114] S1230 , in the target voltage variation period, dynamically adjust the voltage value provided by the target voltage terminal based on the dynamic voltage compensation amount to perform brightness compensation on the N to-be-compensated areas.

[0115] In this embodiment, in S1210, the target voltage terminal is used to provide a target voltage to the sub-pixel in the target stage. The target voltage terminal is, for example, a reset voltage terminal, a bias voltage terminal, etc. The target voltage terminal can be set in the display area of ​​the display panel to provide a target voltage for one or more rows of sub-pixels. The target voltage includes a reset voltage provided to the light-emitting device in the sub-pixel, and may also include a bias voltage provided to the first terminal or the second terminal of the driving module in the pixel circuit of the sub-pixel. Both the reset voltage and the bias voltage affect the final luminous brightness of the light-emitting device.

[0116] The target voltage change period is a period when there is a virtual pixel row in the target stage in the display blanking area. During the target voltage change period, the in-plane load of the display panel has changed due to the presence of the display blanking area, causing the target voltage (such as reset voltage, bias voltage) to fluctuate, thereby causing dark lines to appear in the area to be compensated on the display panel.

[0117] More specifically, within an image frame, the number of the target voltage change periods is N. The number of the areas to be compensated is also N, and the target voltage terminal is used to provide a target voltage to the sub-pixels in the areas to be compensated in the target phase. Therefore, in the target phase, due to the load change in the panel surface, the target voltage provided by the target voltage terminal to the sub-pixels in the areas to be compensated fluctuates, resulting in dark lines in the areas to be compensated. In different image frames, the time region of the target voltage change period is fixed.

[0118] In this embodiment, during the target voltage change period, a voltage measuring device such as an oscilloscope is used to measure the voltage fluctuation of the target voltage terminal during this period, thereby obtaining a target voltage change parameter of the target voltage terminal. Taking the target voltage terminal as the reset voltage terminal as an example, the target voltage change parameter can be the voltage value change of the reset voltage provided by the reset voltage terminal during the target voltage change period.

[0119] In S1220, based on the measured target voltage variation parameter, a dynamic voltage compensation amount corresponding to the target voltage terminal during the target voltage variation period is determined.

[0120] For example, if the target voltage variation parameter indicates that the voltage value provided by the target voltage terminal fluctuates and decreases within the target phase, the relationship between the specific voltage value decrease degree and time can be determined to obtain the dynamic voltage compensation amount. The dynamic voltage compensation amount can be the corresponding relationship between the voltage compensation value and the target voltage variation period.

[0121] In S1230, in the target voltage change period of the subsequent image frame, the voltage value provided by the target voltage terminal is dynamically adjusted based on the dynamic voltage compensation amount. In this way, by testing the voltage fluctuation, the voltage value provided by the target voltage terminal is dynamically adjusted according to the voltage change, thereby achieving brightness compensation for the N areas to be compensated.

[0122] Furthermore, it should be noted that, in this embodiment, the in-plane load is dynamically changed in consideration, and since the voltage value is compensated by dynamically adjusting the voltage value, it is possible to effectively avoid over-compensation or under-compensation during the voltage compensation process, thereby affecting the compensation effect.

[0123] According to some embodiments of the present application, more specifically, in combination with an actual pixel circuit initialization working scenario, the target voltage terminal includes a reset voltage terminal, and the reset voltage terminal is used to provide a reset voltage to the sub-pixel in a reset phase.

[0124] The target voltage change period includes a reset voltage change period, and the reset voltage change period is a period during which a virtual pixel row in a reset phase exists in the display blanking area.

[0125] The target voltage variation parameter includes a reset voltage variation parameter, and the reset voltage variation parameter includes dynamic variation information of a reset voltage at a reset voltage terminal during a reset voltage variation period. The above-mentioned dynamic voltage compensation amount includes a reset voltage compensation amount.

[0126] According to some embodiments of the present application, optionally, Fig.13 As shown, the display panel 100 is electrically connected to the display driver chip 200, and the reset voltage output terminal OUT1 of the display driver chip 200 is electrically connected to the reset voltage terminal vref1 corresponding to each sub-pixel in the N to-be-compensated areas through wiring. The above-mentioned dynamically adjusting the voltage value provided by the target voltage terminal based on the dynamic voltage compensation amount during the target voltage change period includes:

[0127] In the reset voltage variation period, the voltage value of the voltage outputted by the reset voltage output terminal of the display driving chip is dynamically adjusted based on the reset voltage compensation amount to adjust the voltage value of the reset voltage provided by the reset voltage terminal to the sub-pixel.

[0128] In this embodiment, the display driver chip 200 (Display Driver IC) plays a vital role in the operation of the display panel 100, and is responsible for controlling functions such as pixel driving, grayscale control, and brightness adjustment of the display panel 100. The reset voltage is usually generated by a circuit inside the display driver chip 200, and is output to the reset voltage terminal vref1 in the display panel through the reset voltage output terminal OUT1 via a wiring.

[0129] The difference between the reset voltage output terminal OUT1 of the display driver chip 200 and the reset voltage terminal vref1 is that the reset voltage terminal vref1 is a terminal disposed in the display panel 100. The voltage value outputted by the reset voltage output terminal OUT1 is usually constant. However, the reset voltage terminal vref1 is disposed in the plane, and the voltage value directly provided to the sub-pixel will be affected by the change of the in-plane load due to the wiring and the display blanking area.

[0130] In specific implementation, in the reset voltage variation period, the voltage value of the reset voltage output terminal OUT1 of the display driver chip 200 is dynamically adjusted according to the reset voltage compensation amount. In this way, the voltage value of the reset voltage provided to the sub-pixel by the reset voltage terminal vref1 can be effectively adjusted.

[0131] According to some embodiments of the present application, optionally, see Fig.14 In order to more reasonably realize the dynamic compensation adjustment of the sub-pixel reset voltage, the above-mentioned method of dynamically adjusting the voltage value outputted by the reset voltage output terminal OUT1 of the display driver chip 200 based on the reset voltage compensation amount during the reset voltage change period T1 includes:

[0132] In the first sub-period t1 of the reset voltage variation period T1, the voltage value of the voltage outputted by the reset voltage output terminal OUT1 of the display driving chip 200 is dynamically increased based on the reset voltage compensation amount;

[0133] In the second sub-period t2 of the reset voltage variation period T1, based on the reset voltage compensation amount, the voltage value outputted by the reset voltage output terminal OUT1 of the display driving chip 200 is maintained at the maximum voltage value in the first sub-period t1;

[0134] In the third sub-period t3 of the reset voltage variation period T1, based on the reset voltage compensation amount, starting from the maximum voltage value, the voltage value outputted by the reset voltage output terminal OUT1 of the display driving chip 200 is dynamically reduced;

[0135] The first sub-period t1, the second sub-period t2 and the third sub-period t3 are connected in sequence.

[0136] In specific implementation, combined with the above examples, considering that the change of in-plane load is a dynamic process, the first sub-period t1 is actually a period during which the number of virtual sub-pixels in the reset stage in the display blanking area gradually increases from 0 rows to 90 rows. The second sub-period t2 is a period during which the number of virtual sub-pixels in the reset stage in the display blanking area is fixed to 90 rows. The third sub-period t3 is a period during which the number of virtual sub-pixels in the reset stage in the display blanking area gradually decreases from 90 rows to 0 rows.

[0137] In the first sub-period t1, since the number of virtual pixel rows in the reset stage in the display blanking area is constantly increasing, the in-plane load is gradually reduced, and the reset voltage received by the sub-pixel is gradually reduced under the influence of the load, and the negative voltage is more negative. During this period, the reset voltage received by the sub-pixel can be compensated by dynamically increasing the voltage value output by the reset voltage output terminal OUT1 of the display driver chip 200.

[0138] In the second sub-period t2, there are always a fixed number of virtual pixel rows in the display blanking area in the reset stage, so during this period, the voltage value output by the reset voltage output terminal OUT1 of the display driver chip 200 is kept stable, and the voltage value is the maximum voltage value in the first sub-period t1.

[0139] In the third sub-period t3, since the number of virtual pixel rows in the reset stage in the display blanking area is constantly decreasing, the in-plane load gradually increases to return to normal, and the voltage fluctuation of the reset voltage received by the sub-pixel gradually decreases. Therefore, in this period, the voltage value of the voltage output by the reset voltage output terminal OUT1 of the display driver chip 200 is dynamically reduced, thereby realizing dynamic and accurate compensation of the reset voltage.

[0140] In this embodiment, according to the reset voltage change time zone and change amount, the display driver chip performs accurate voltage compensation in the change time zone to keep the reset voltage stable, thereby effectively ensuring the consistency of the anode reset degree, avoiding the problem of uneven brightness and split screen display caused by different anode reset degrees, and thus improving the visual effect.

[0141] According to some embodiments of the present application, more specifically, in combination with an actual pixel circuit bias adjustment scenario, the target voltage terminal includes a bias voltage terminal, and the bias voltage terminal is used to provide a bias adjustment voltage to the sub-pixel in a bias adjustment stage.

[0142] The target voltage variation period includes a bias voltage variation period, and the bias voltage variation period is a period of time during which a virtual pixel row in a bias adjustment phase exists in a display blanking region.

[0143] The target voltage change parameter includes a bias voltage change parameter, and the bias voltage change parameter includes dynamic change information of a bias adjustment voltage at the bias voltage terminal during a bias voltage change period; the dynamic voltage compensation amount includes a bias voltage compensation amount.

[0144] According to some embodiments of the present application, more specifically, Fig.15 As shown, the display panel 100 is electrically connected to the display driver chip 200, and the bias voltage output terminal OUT2 of the display driver chip 200 is electrically connected to the bias voltage terminal vref2 corresponding to each sub-pixel in the N to-be-compensated areas through wiring. In the target voltage change period, based on the dynamic voltage compensation amount, the voltage value provided by the target voltage terminal is dynamically adjusted, including:

[0145] In the bias voltage variation period T2 , the voltage value of the voltage outputted by the bias voltage output terminal OUT2 of the display driving chip 200 is dynamically adjusted based on the bias voltage compensation amount to adjust the voltage value of the bias voltage provided to the sub-pixel by the bias voltage terminal vref2 .

[0146] In this embodiment, the display driver chip 200 (Display Driver IC) plays a vital role in the operation of the display panel 100, and is responsible for controlling functions such as pixel driving, grayscale control, and brightness adjustment of the display panel 100. The bias voltage is usually generated by a circuit inside the display driver chip 200, and is output to the display panel 100 through the bias voltage output terminal OUT2 via a wiring.

[0147] Unlike the bias voltage output terminal OUT2 of the display driver chip 200, the bias voltage terminal vref2 is a terminal disposed in the display panel 100. The voltage value outputted by the bias voltage output terminal OUT2 is usually stable. However, since the bias voltage terminal vref2 is disposed in the plane, the voltage value directly provided to the sub-pixel may be affected by the change of the in-plane load due to the wiring and the display blanking area.

[0148] In specific implementation, in the bias voltage variation period T2, the voltage value outputted by the bias voltage output terminal OUT2 of the display driver chip 200 is dynamically adjusted according to the bias voltage compensation amount. In this way, the voltage value of the bias voltage provided to the sub-pixel by the bias voltage terminal vref2 can be effectively adjusted.

[0149] According to some embodiments of the present application, optionally, Fig.16 As shown, in order to more reasonably realize the dynamic compensation adjustment of the sub-pixel bias voltage, the voltage value of the voltage outputted by the bias voltage output terminal OUT2 of the display driver chip 200 is dynamically adjusted based on the bias voltage compensation amount in the bias voltage variation period T2, including:

[0150] In the fourth sub-period t4 of the bias voltage variation period T2, the voltage value of the voltage outputted by the bias voltage output terminal OUT2 of the display driving chip 200 is dynamically reduced based on the bias voltage compensation amount;

[0151] In the fifth sub-period t5 of the bias voltage variation period T2, based on the bias voltage compensation amount, the voltage value outputted by the bias voltage output terminal OUT2 of the display driving chip 200 is maintained at the minimum voltage value in the fourth sub-period t4;

[0152] In the sixth sub-period t6 of the bias voltage variation period T2, based on the bias voltage compensation amount, starting from the minimum voltage value, the voltage value outputted by the bias voltage output terminal OUT2 of the display driving chip 200 is dynamically increased;

[0153] The fourth sub-period t4, the fifth sub-period t5 and the sixth sub-period t6 are connected in sequence.

[0154] In specific implementation, in the fourth sub-period t4, as the number of virtual pixel rows in the display blanking area that are in the bias adjustment stage continues to increase, the in-plane load gradually decreases, and the bias voltage received by the sub-pixel gradually increases under the influence of the load, the more positive the voltage is, during this period, the bias voltage received by the sub-pixel can be compensated by dynamically reducing the voltage value output by the bias voltage output terminal OUT2 of the display driver chip 200.

[0155] In the fifth sub-period t5, there are always a fixed number of virtual pixel rows in the display blanking area in the bias adjustment stage, so the voltage value output by the bias voltage output terminal OUT2 of the display driver chip 200 is kept stable during this period, and the voltage value is the minimum voltage value in the fourth sub-period t4.

[0156] In the sixth sub-period t6, since the number of virtual pixel rows in the bias adjustment stage in the display blanking area is constantly decreasing, the in-plane load gradually increases until it returns to normal, and the voltage fluctuation of the bias voltage received by the sub-pixel gradually decreases. Therefore, in this period, the voltage value of the voltage output by the bias voltage output terminal OUT2 of the display driver chip 200 is dynamically increased from the minimum voltage value, thereby realizing dynamic and accurate compensation of the bias voltage.

[0157] It should be added that, when the reset phase and the bias adjustment phase of the sub-pixel are the same, the first sub-period is the same as the fourth sub-period t4, the second sub-period is the same as the fifth sub-period t5, and the third sub-period is the same as the sixth sub-period t6.

[0158] In this embodiment, according to the bias voltage change time region and change amount, the display driver chip 200 performs accurate bias voltage compensation in the change time region to keep the bias voltage stable, thereby helping to improve the split-screen display problem of the display panel 100 and enhance the visual effect.

[0159] Furthermore, in some embodiments, after the brightness of the area to be compensated is compensated by the voltage dynamic compensation method, it is also possible to further debug through visual confirmation on the basis of the compensation of the initial reset voltage compensation amount and / or the bias voltage compensation amount, so as to determine the optimal display driver chip voltage compensation amount.

[0160] When confirming the visual effects, after performing voltage compensation on the display panel based on the initial reset voltage compensation amount and / or bias voltage compensation amount, the display panel is allowed to display the target grayscale value at the target brightness level in the aforementioned embodiment, and then the brightness deviation between N areas to be compensated and the normal area is tested.

[0161] If the brightness deviation meets the requirements, it means that the panel compensation effect is good. If the brightness deviation does not meet the requirements, the reset voltage compensation amount and / or the bias voltage compensation amount can be adjusted based on the brightness deviation. After the adjustment, a new round of visual effect confirmation is continued until the brightness deviation between the area to be compensated and the normal area obtained by the test meets the requirements. In this way, the compensation effect of the above voltage compensation amount can be fully ensured, which helps to significantly improve the visual effect.

[0162] Based on the display panel compensation method provided in the above embodiment, the present application also provides a display panel compensation device corresponding to the display panel compensation method. Fig.17 A compensation device for a display panel is introduced in detail.

[0163] Fig.17 FIG. 1 is a schematic diagram showing the structure of a compensation device for a display panel provided by an embodiment of the present application. Fig.17 As shown, the compensation device 1700 of the display panel includes:

[0164] A first acquisition module 1710 is used to acquire N areas to be compensated of the display panel, where the N areas to be compensated are determined based on a target scanning timing and a display blanking area of ​​the display panel, where N is a positive integer, and the target scanning timing includes at least one of a first scanning timing and a second scanning timing, where the first scanning timing is used for a reset scan of a sub-pixel in the display panel, and the second scanning timing is used for a bias adjustment scan of a driving module in the sub-pixel;

[0165] The second acquisition module 1720 is used to respectively acquire first brightness parameter deviations between N areas to be compensated and a normal area of ​​the display panel when the display panel displays images at various grayscale values ​​at different brightness levels;

[0166] The first compensation module 1730 is used to determine a target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and perform brightness compensation on the N to-be-compensated areas based on the target brightness compensation parameter.

[0167] Fig.17 Each module / unit in the device shown has the function of implementing each step in the display panel compensation method provided by the above method embodiment and can achieve its corresponding technical effect, which will not be described in detail here for the sake of brevity.

[0168] Based on the display panel compensation method provided in the above embodiment of the present application, a display panel compensation device provided in the present application is introduced below. Fig.18 , Fig.18 It is a schematic diagram of the structure of a compensation device for a display panel provided in one embodiment of the present application.

[0169] like Fig.18 As shown, the compensation device for the display panel may include a processor 1801 and a memory 1802 storing computer program instructions.

[0170] Specifically, the processor 1801 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0171] Memory 1802 may include a large capacity memory for data or instructions. By way of example and not limitation, memory 1802 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, memory 1802 may include removable or non-removable (or fixed) media. In appropriate cases, memory 1802 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, memory 1802 is a non-volatile solid-state memory.

[0172] The memory may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical or other physical / tangible memory storage devices. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0173] The processor 1801 implements any one of the display panel compensation methods in the above embodiments by reading and executing computer program instructions stored in the memory 1802 .

[0174] In one example, the compensation device for the data display panel may further include a communication interface 1803 and a bus 1810. Fig.18 As shown, the processor 1801, the memory 1802, and the communication interface 1803 are connected via a bus 1810 and communicate with each other.

[0175] The communication interface 1803 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0176] Bus 1810 includes hardware, software or both, and the parts of the compensation device of display panel are coupled to each other.For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In suitable cases, bus 1810 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0177] The compensation device of the display panel executes the compensation method of the display panel in the embodiment of the present application, thereby realizing the compensation method of the display panel provided in any one or more drawings of the above method embodiment.

[0178] In addition, in combination with the compensation method of the display panel in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the compensation methods of the display panel in the above embodiment is implemented.

[0179] Based on the display panel compensation method in the above-mentioned embodiments, an embodiment of the present application provides a computer program product. When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the display panel compensation method provided in any one of the above-mentioned embodiments of the present application.

[0180] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0181] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0182] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0183] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0184] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application.

Claims

1. A compensation method for a display panel, characterized in that: include: Acquire N areas to be compensated of the display panel, wherein the N areas to be compensated are determined based on a target scanning timing and a display blanking area of ​​the display panel, where N is a positive integer, and the target scanning timing includes at least one of a first scanning timing and a second scanning timing, wherein the first scanning timing is used for a reset scan of a sub-pixel in the display panel, and the second scanning timing is used for a bias adjustment scan of a driving module in a sub-pixel; When the display panel displays images at various grayscale values ​​at different brightness levels, first brightness parameter deviations between the N areas to be compensated and a normal area of ​​the display panel are respectively obtained; Based on the first brightness parameter deviation, a target brightness compensation parameter of the display panel is determined, and brightness compensation is performed on the N areas to be compensated based on the target brightness compensation parameter.

2. The method according to claim 1, characterized in that After determining the target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and performing brightness compensation on the N to-be-compensated areas based on the target brightness compensation parameter, the method further includes: The following steps are executed in a loop: when the target brightness compensation parameter is used to perform brightness compensation on the N to-be-compensated areas, when the display panel displays at a target grayscale value under a target brightness level, obtaining a second brightness parameter deviation between the N to-be-compensated areas and the normal area; When the second brightness parameter deviation exceeds a preset deviation threshold, the target brightness compensation parameter is adjusted based on the second brightness parameter deviation to obtain an updated target brightness compensation parameter, until the second brightness parameter deviation corresponding to the updated target brightness compensation parameter is less than or equal to the preset deviation threshold.

3. The method according to claim 1, characterized in that The step of determining a target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and performing brightness compensation on the N to-be-compensated areas based on the target brightness compensation parameter, includes: Determining target gamma compensation parameters corresponding to the grayscale values ​​of the N areas to be compensated at different brightness levels based on the first brightness parameter deviation; Based on the target gamma compensation parameter, brightness compensation is performed on the N areas to be compensated.

4. The method according to claim 3, characterized in that The N areas to be compensated include a plurality of sub-pixels; before performing brightness compensation on the N areas to be compensated based on the target gamma compensation parameter, the method further includes: When grayscale information corresponding to the picture to be displayed is obtained, determining the grayscale value of each sub-pixel in the N areas to be compensated according to the grayscale information; The performing brightness compensation on the N to-be-compensated areas based on the target gamma compensation parameter includes: Based on the target gamma compensation parameter, brightness compensation is performed on the grayscale value of each sub-pixel in the N areas to be compensated.

5. The method according to claim 4, characterized in that The performing brightness compensation on the grayscale value of each sub-pixel in the N to-be-compensated areas based on the target gamma compensation parameter includes: Based on the current brightness level of the display panel and the grayscale value of each sub-pixel in the N to-be-compensated areas, determining the brightness compensation value corresponding to each sub-pixel in the N to-be-compensated areas from the target gamma compensation parameter; Based on the brightness compensation values ​​respectively corresponding to the sub-pixels in the N areas to be compensated, brightness compensation is respectively performed on the grayscale values ​​of the sub-pixels in the N areas to be compensated.

6. The method according to claim 1, characterized in that The display panel includes a plurality of sub-pixels arranged in an array, the plurality of sub-pixels include a pixel circuit and a light-emitting device, and the pixel circuit includes a reset module; The control end of the reset module is electrically connected to the first scan signal line, the first end of the reset module is electrically connected to the corresponding reset voltage end, and the second end of the reset module is electrically connected to the corresponding light emitting device; The first scanning timing is the scanning timing of the first scanning signal line.

7. The method according to claim 6, characterized in that The pixel circuit includes a driving module and a bias adjustment module; The driving module is used to drive the light emitting device to emit light; The control end of the bias adjustment module is electrically connected to the second scanning signal line, the first end of the bias adjustment module is electrically connected to the corresponding bias voltage end, and the second end of the bias adjustment module is electrically connected to the first end or the second end of the driving module; The second scanning timing is the scanning timing of the second scanning signal line.

8. The method according to claim 7, characterized in that The first scanning signal line is multiplexed into the second scanning signal line; The first scanning timing is the same as the second scanning timing.

9. The method according to claim 1, characterized in that: One frame of the display panel includes a display effective area and the display blanking area; the N areas to be compensated include a plurality of pixel rows; The pixel behavior in the N areas to be compensated is: when the effective level of the target scanning timing is scanned to the display blanking area, the pixel row in the display effective area receives the effective level of the target scanning timing.

10. The method according to claim 1, characterized in that The first scanning timing is the same as the second scanning timing; In one image frame, the number of valid pulses in the first scanning timing or the second scanning timing is N+1.

11. The method according to any one of claims 1 to 10, characterized in that: The method further comprises: In a target voltage change period within an image frame, a target voltage change parameter of a target voltage terminal is measured, wherein the target voltage terminal is used to provide a target voltage to a sub-pixel in a target stage, and the target voltage is associated with the luminous brightness of the sub-pixel in the display panel; the target voltage change period is a period in which a virtual pixel row in the target stage exists in the display blanking area; Based on the target voltage variation parameter, determining a dynamic voltage compensation amount corresponding to the target voltage terminal during the target voltage variation period; In the target voltage variation period, the voltage value provided by the target voltage terminal is dynamically adjusted based on the dynamic voltage compensation amount to perform brightness compensation on the N to-be-compensated areas.

12. The method according to claim 11, characterized in that The target voltage terminal includes a reset voltage terminal, and the reset voltage terminal is used to provide a reset voltage to the sub-pixel in a reset phase; The target voltage change period includes a reset voltage change period, and the reset voltage change period is a period of time when a virtual pixel row in a reset stage exists in the display blanking area; The target voltage variation parameter includes a reset voltage variation parameter, and the reset voltage variation parameter includes dynamic variation information of the reset voltage at the reset voltage terminal during the reset voltage variation period; The dynamic voltage compensation amount includes a reset voltage compensation amount.

13. The method according to claim 12, characterized in that The display panel is electrically connected to a display driver chip, and a reset voltage output terminal of the display driver chip is electrically connected to reset voltage terminals corresponding to respective sub-pixels in the N areas to be compensated through wiring; The dynamically adjusting the voltage value provided by the target voltage terminal based on the dynamic voltage compensation amount during the target voltage variation period includes: In the reset voltage variation period, the voltage value of the voltage outputted by the reset voltage output terminal of the display driving chip is dynamically adjusted based on the reset voltage compensation amount to adjust the voltage value of the reset voltage provided by the reset voltage terminal to the sub-pixel.

14. The method according to claim 13, characterized in that The step of dynamically adjusting the voltage value of the voltage outputted by the reset voltage output terminal of the display driver chip based on the reset voltage compensation amount during the reset voltage variation period includes: In a first sub-period in the reset voltage variation period, dynamically increasing a voltage value of a voltage outputted by a reset voltage output terminal of the display driving chip based on the reset voltage compensation amount; In a second sub-period of the reset voltage variation period, based on the reset voltage compensation amount, maintaining the voltage value of the voltage outputted by the reset voltage output terminal of the display driver chip at the maximum voltage value in the first sub-period; In a third sub-period of the reset voltage variation period, based on the reset voltage compensation amount, starting from the maximum voltage value, dynamically reducing the voltage value output by the reset voltage output terminal of the display driver chip; The first sub-period, the second sub-period and the third sub-period are connected in sequence.

15. The method according to claim 11, characterized in that The target voltage terminal includes a bias voltage terminal, and the bias voltage terminal is used to provide a bias adjustment voltage to the sub-pixel in a bias adjustment stage; The target voltage variation period includes a bias voltage variation period, and the bias voltage variation period is a period of time during which a virtual pixel row in the bias adjustment stage exists in the display blanking area; The target voltage variation parameter includes a bias voltage variation parameter, and the bias voltage variation parameter includes dynamic variation information of the bias adjustment voltage at the bias voltage terminal during the bias voltage variation period; The dynamic voltage compensation amount includes a bias voltage compensation amount.

16. The method according to claim 15, characterized in that The display panel is electrically connected to a display driver chip, and a bias voltage output terminal of the display driver chip is electrically connected to bias voltage terminals corresponding to each sub-pixel in the N to-be-compensated areas through wiring. The dynamically adjusting the voltage value provided by the target voltage terminal based on the dynamic voltage compensation amount during the target voltage variation period includes: In the bias voltage variation period, the voltage value of the voltage outputted by the bias voltage output terminal of the display driver chip is dynamically adjusted based on the bias voltage compensation amount to adjust the voltage value of the bias voltage provided by the bias voltage terminal to the sub-pixel.

17. The method according to claim 16, characterized in that The step of dynamically adjusting the voltage value of the voltage outputted by the bias voltage output terminal of the display driver chip based on the bias voltage compensation amount during the bias voltage variation period includes: In a fourth sub-period in the bias voltage variation period, dynamically reducing a voltage value of a voltage outputted by a bias voltage output terminal of the display driving chip based on the bias voltage compensation amount; In a fifth sub-period of the bias voltage variation period, based on the bias voltage compensation amount, maintaining the voltage value outputted by the bias voltage output terminal of the display driver chip at the minimum voltage value in the fourth sub-period; In a sixth sub-period of the bias voltage variation period, based on the bias voltage compensation amount, starting from the minimum voltage value, dynamically increasing the voltage value outputted by the bias voltage output terminal of the display driver chip; The fourth sub-period, the fifth sub-period and the sixth sub-period are connected in sequence.

18. The method according to claim 11, characterized in that In one image frame, the number of the target voltage change periods is N.

19. A compensation device for a display panel, characterized in that: The device comprises: A first acquisition module is used to acquire N areas to be compensated of the display panel, wherein the N areas to be compensated are determined based on a target scanning timing and a display blanking area of ​​the display panel, where N is a positive integer, and the target scanning timing includes at least one of a first scanning timing and a second scanning timing, wherein the first scanning timing is used for a reset scan of a sub-pixel in the display panel, and the second scanning timing is used for a bias adjustment scan of a driving module in a sub-pixel; A second acquisition module, configured to respectively acquire first brightness parameter deviations between the N areas to be compensated and a normal area of ​​the display panel when the display panel displays images at various grayscale values ​​at different brightness levels; The first compensation module is used to determine a target brightness compensation parameter of the display panel based on the first brightness parameter deviation, and perform brightness compensation on the N areas to be compensated based on the target brightness compensation parameter.

20. An electronic device, characterized in that: The electronic device comprises: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the display panel compensation method as claimed in any one of claims 1 to 18.

21. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the compensation method for a display panel according to any one of claims 1 to 18 are implemented.

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