Compensation method of display panel and display device

Abstract

A compensation method of a display panel and a display device, the compensation method of the display panel comprising: obtaining a curvature parameter of the display panel; determining whether the curvature parameter is equal to a first preset parameter; when the curvature parameter is equal to the first preset parameter, performing display compensation on the display panel by using a first compensation parameter; and when the curvature parameter is not equal to the first preset parameter, performing compensation on the display panel by using a second compensation parameter. According to the curvature parameter of the display panel, it is determined to perform display compensation on the display panel by using the first compensation parameter or the second compensation parameter, so that the display panel can be shared in at least two different curvature states.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a compensation method of display panel and display device. BACKGROUND

[0002] With the continuous development of display screen products, the application of curved display screen is more and more widely. For example, high-end e-sports display screen uses curved display screen. The display panel used by the curved display device will cause curved Mura due to bending. In order to make the display panel have better display effect, the display panel in the display device is usually compensated for Mura to reduce or even eliminate the Mura of the display panel. However, when the display panel displays in other curvature states (such as flat display state), the phenomenon of over-compensation leading to white-out in a certain area or under-compensation leading to black-out in a certain area will occur. In other words, when the display panel in a certain curvature state is compensated for Mura, the display panel will still have Mura in another curvature state. As can be seen, in the prior art, the display panel cannot be used in two different curvature states. SUMMARY

[0003] The purpose of the present application is to provide a compensation method of display panel and display device to solve the technical problem that the display panel cannot be used in two different curvature states.

[0004] In a first aspect, the present application provides a compensation method of display panel, applied to the display panel, comprising:

[0005] obtaining a curvature parameter of the display panel;

[0006] determining whether the curvature parameter is equal to a first preset parameter;

[0007] when the curvature parameter is equal to the first preset parameter, using a first compensation parameter to compensate for display of the display panel; and

[0008] when the curvature parameter is not equal to the first preset parameter, using a second compensation parameter to compensate for the display panel.

[0009] The second compensation parameter includes a first sub-parameter, and when the curvature parameter is not equal to the first preset parameter, the second compensation parameter is used to compensate for the display panel, comprising:

[0010] when the curvature parameter is not equal to the first preset parameter and the curvature parameter is equal to a second preset parameter, using the first sub-parameter to compensate for the display panel.

[0011] The second compensation parameter further includes a second sub-parameter, and the compensating the display panel by using the second compensation parameter when the curvature parameter is not equal to the first preset parameter further includes:

[0012] The compensating the display panel by using the second sub-parameter when the curvature parameter is not equal to the first preset parameter and the curvature parameter is equal to a third preset parameter.

[0013] The compensating the display panel by using the first compensation parameter when the curvature parameter is equal to the first preset parameter includes:

[0014] obtaining a test picture when the display panel loads test data when the curvature parameter of the display panel is the first preset parameter;

[0015] determining whether display parameters of each region of the test picture are consistent, wherein the display parameters at least include display brightness;

[0016] obtaining the first compensation parameter according to differences between the display parameters of the partial region and the display parameters of the other region when the display parameters of the partial region and the display parameters of the other region in the test picture are inconsistent.

[0017] The compensating the display panel by using the first compensation parameter when the curvature parameter is equal to the first preset parameter includes:

[0018] obtaining the test picture of a plurality of display panels;

[0019] determining Mura data of each display panel to obtain a plurality of Mura data;

[0020] obtaining average Mura data according to the plurality of Mura data, wherein the first compensation parameter corresponds to the average Mura data; and

[0021] compensating the display panel by using the first compensation parameter.

[0022] In a second aspect, the present application provides a display device, characterized in that comprising:

[0023] a display panel;

[0024] a first controller for obtaining a voltage signal representing a curvature parameter of the display panel;

[0025] a second controller for determining whether the curvature parameter is equal to a first preset parameter according to the voltage signal;

[0026] a first memory storing a first compensation parameter, the second controller performing display compensation on the display panel using the first compensation parameter when the curvature parameter is equal to the first preset parameter; and

[0027] a second memory storing a second compensation parameter, the second controller performing display compensation on the display panel using the second compensation parameter when the curvature parameter is not equal to the first preset parameter.

[0028] The display device comprises a connector.

[0029] The connector comprises a first pin electrically connected to the second controller, the first controller transmitting a first voltage signal to the second controller through the first pin of the connector, the second controller performing display compensation on the display panel using the first compensation parameter according to the first voltage signal, and the first controller also transmitting a second voltage signal to the second controller through the first pin of the connector, the second controller performing display compensation on the display panel using the second compensation parameter according to the second voltage signal.

[0030] The display device further comprises:

[0031] a driver electrically connected to the first memory, the second memory and the display panel respectively, the driver being configured to drive the display panel using the first compensation parameter, and the driver also being configured to drive the display panel using the second compensation parameter.

[0032] The display device further comprises:

[0033] a first connecting member electrically connected to the second controller and the first memory, the second controller reading the first compensation parameter using the first connecting member according to the first voltage signal.

[0034] The display device further comprises:

[0035] a second connecting member electrically connected to the second controller and the second memory, the second controller reading the second compensation parameter using the second connecting member according to the second voltage signal.

[0036] The compensation method of the display panel provided by the present application compares the curvature parameter of the display panel with a first preset parameter and determines whether to perform display compensation on the display panel using a first compensation parameter or a second compensation parameter, so that the display panel can be shipped in at least two different curvature states. BRIEF DESCRIPTION OF DRAWINGS

[0037] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of the display device provided in the embodiments of this application;

[0039] Figure 2 yes Figure 1 Schematic diagram of the structure of region A in the middle;

[0040] Figure 3 This is a flowchart of a compensation method for a display panel provided in an embodiment of this application;

[0041] Figure 4 yes Figure 3 The present invention provides a flowchart of step S400 of a compensation method for a display panel in one embodiment;

[0042] Figure 5 yes Figure 3 The flowchart included in S400 of the compensation method process for the display panel in another embodiment is provided;

[0043] Figure 6 This is a schematic diagram showing the connection between the first controller and the second controller according to another embodiment of this application;

[0044] Figure 7 This is a partial structural schematic diagram of a display device provided in another embodiment of this application;

[0045] Figure 8 yes Figure 3 The present invention provides a flowchart of step S300 of a compensation method for a display panel in one embodiment;

[0046] Figure 9 This is a schematic diagram of the area division of a display panel provided in an embodiment of this application;

[0047] Figure 10 yes Figure 3 The flowchart included in S400 of the compensation method process for the display panel in another embodiment is provided;

[0048] Figure 11 This is a schematic diagram showing the overlapping area division of multiple display panels provided in the embodiments of this application.

[0049] Label explanation: display device-1, display panel-10, display area-14, non-display area-15, first area-111, second area-112, third area-113, to-be-compensated sub-area-114, to-be-compensated sub-area-115, to-be-compensated sub-area-116, first controller-21, second controller-22, first memory-31, second memory-32, third memory-33, fourth memory-34, first circuit board-41, second circuit board-42, connection cable-43, connector-50, first pin-51, second pin-52, driver-60, first connecting piece-71, second connecting piece-72. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0051] Reference herein to "an embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment or embodiments can be included in at least one embodiment of the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. Those skilled in the art will appreciate that embodiments described herein can be combined with other embodiments.

[0052] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above-described drawings are used to distinguish different objects, and are not used to describe a particular order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0053] In the present specification, in order to facilitate the description and simplify the description, the words indicating the orientation or positional relationship of "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used to refer to the positional relationship of the components with reference to the drawings, and are only for the convenience of the description of the present specification and the simplification of the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. The positional relationship of the components is appropriately changed according to the direction of the described components. Therefore, it is not limited to the words described in the specification, and can be appropriately changed according to the situation.

[0054] In this specification, unless otherwise expressly specified and limited, the terms "install", "connect", "connection" should be construed broadly. For example, it can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate parts, or internal connection of two elements. For those skilled in the art, the meaning of the above terms in this disclosure can be understood according to the situation.

[0055] Liquid Crystal Display (LCD) has the characteristics of light and thin, low power consumption, etc., and is quickly recognized and popularized by the market and consumers. The liquid crystal display can be, but is not limited to, a vertically aligned mode liquid crystal display (VA-LCD). Due to the influence of materials, process, etc. in the production process of the display panel of the display device, part of the product picture display is uneven, that is, Mura is caused. Mura refers to the situation that the brightness or chroma of the display panel display picture is not uniform.

[0056] Mura is a common defect in display technology, which is mainly caused by the difference in characteristics of each TFT caused by the immaturity of TFT process. With the increasingly strict requirements of customers on the display quality of the display panel, Demura technology has been rapidly developed and put into mass production to improve the uniformity of the display picture of the display panel, and thus to improve the yield of the display screen mass production to meet the delivery requirements of customers. Demura technology is a compensation method for Mura defects, which is divided into internal compensation and external compensation. Internal compensation uses compensation pixel circuit to compensate for the characteristic difference of TFT; external compensation detects the difference of different pixel units through optical or electrical means, and compensates by changing the driving voltage. The Demura compensation method commonly used in the related art is to shoot a plurality of gray scale pictures by a high-resolution and high-precision charge coupled device (CCD) camera, and then analyze the pixel color distribution characteristics in the display picture according to the data collected by the CCD camera, and identify the Mura data according to the algorithm. Demura compensation data is generated according to the Demura compensation algorithm corresponding to the Mura data, and the Demura compensation data can be used for Mura compensation.

[0057] With the continuous development of display screen products, the application of curved display screens is more and more widely. For example, high-end e-sports display screens use curved display screens. The display panel used by the curved display device will cause curved Mura due to bending. In order to make the display panel have better display effect, the display panel in the display device is usually compensated for Mura to reduce or even eliminate the Mura of the display panel. However, when the display panel displays in other curvature states (such as a flat display state), the phenomenon of overcompensation leading to white-out in a certain area or the phenomenon of undercompensation leading to black-out in a certain area will occur. In other words, when the display panel in a certain curvature state is compensated for Mura, the display panel will still have Mura in another curvature state. Therefore, in the prior art, the display panel cannot be shared in two different curvature states.

[0058] The application discloses a compensation method of a display panel and a display device, which can solve the problem that display panels in two different curvature states cannot be directly shared.

[0059] The application provides a display device 1, please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of the display device provided by the application, Figure 2 is Figure 1 a structural schematic diagram of an A area in the display device 1. The display device 1 comprises a display panel 10, a first controller 21, a second controller 22, a first memory 31 and a second memory 32. The first controller 21 is configured to acquire a voltage signal representing a curvature parameter of the display panel 10. The second controller 22 is configured to determine whether the curvature parameter is equal to a first preset parameter according to the voltage signal. The first memory 31 stores a first compensation parameter, and the second controller 22 performs display compensation on the display panel 10 by using the first compensation parameter when the curvature parameter is equal to the first preset parameter. The second memory 32 stores a second compensation parameter, and the second controller 22 performs display compensation on the display panel 10 by using the second compensation parameter when the curvature parameter is not equal to the first preset parameter.

[0060] Optionally, the display panel 10 includes but is not limited to an open cell (OC) liquid crystal display panel. Due to the influence of the above-mentioned materials, process, etc., the display panel 10 will have Mura when displaying, and therefore, the display panel 10 needs to be compensated for Mura. When the curvature parameters of the display panel 10 are different, the data for compensating for Mura of the display panel 10 is different.

[0061] Optionally, the first controller 21 includes but is not limited to a system on a chip (SOC). Optionally, the second controller 22 includes but is not limited to a timing controller (TCON), and the first memory 31 and the second memory 32 include but are not limited to a flash memory.

[0062] The first controller 21 performs display compensation on the display panel 10 using the first compensation parameter is described in detail below.

[0063] Specifically, the first controller 21 is electrically connected to the second controller 22, and the first controller 21 can obtain a voltage signal representing the curvature parameter of the display panel 10. In this embodiment, the first controller 21 obtains the voltage signal representing the curvature parameter of the display panel 10 from an external circuit board. In other embodiments, the first controller 21 can also obtain the voltage signal representing the curvature parameter of the display panel 10 from other devices, which is not limited in the present application.

[0064] Different voltage signals represent different curvature parameters of the display panel 10, and the voltage signal corresponds to the curvature parameter of the display panel 10 one by one. For example, when the voltage signal is a first voltage signal, it represents a first curvature parameter of the display panel 10; when the voltage signal is a second voltage signal, it represents a second curvature parameter of the display panel 10. The first voltage signal is a low-level voltage signal, and the second voltage signal is a high-level voltage signal. The voltage of the first voltage signal includes but is not limited to 0V, and the voltage of the second voltage signal includes but is not limited to 3.3V. It can be understood that in other possible embodiments, the first voltage signal can also be a high-level voltage signal, and the second voltage signal can also be a low-level voltage signal, which is not limited in the present application.

[0065] The first controller 21 inputs the voltage signal to the second controller 22. The second controller 22 determines whether the curvature parameter of the display panel 10 is equal to a first preset parameter according to the voltage signal. When the curvature parameter is equal to the first preset parameter, the second controller 22 performs display compensation on the display panel 10 by using the first compensation parameter in the first memory 31. The first preset parameter corresponds to the first compensation parameter. When the display panel 10 with the curvature parameter equal to the first preset parameter is compensated by using the first compensation parameter, the display panel 10 can normally display when the curvature parameter is the first preset parameter, and there is no Mura. The test picture of the display panel 10 in different curvature parameters can be analyzed in advance to obtain the compensation parameter in different curvature parameters, and the compensation parameter is stored in the corresponding memory. When the compensation parameter is used to compensate the display panel 10 in the corresponding curvature parameter, the display panel 10 can normally display when the curvature parameter is the preset parameter. For example, the test picture of the display panel 10 when the curvature parameter is equal to the first preset parameter is analyzed in advance to obtain the first compensation parameter, and the first compensation parameter is stored in the first memory 31. Therefore, when the second controller 22 determines that the display panel 10 is equal to the first preset parameter according to the voltage signal, the display panel 10 is compensated by using the first compensation parameter, and the display panel 10 with the curvature parameter equal to the first preset parameter can normally display after the display panel 10 is compensated by using the first compensation parameter.

[0066] When the curvature parameter is not equal to the first preset parameter, the second controller 22 compensates the display panel 10 by using the second compensation parameter in the second memory 32.

[0067] When the second compensation parameter is used to compensate the display panel 10 with a curvature parameter not equal to the first preset parameter, the display panel 10 can display normally when the curvature parameter is not equal to the first preset parameter, and there is no Mura. Similarly, the test picture of the display panel 10 with different curvature parameters can be analyzed in advance to obtain the compensation parameter when the curvature parameter is different, and the compensation parameter is stored in the corresponding memory. When the compensation parameter is used to compensate the display panel 10 in the corresponding curvature parameter, the display panel 10 can display normally when the curvature parameter is not equal to the preset parameter. For example, the test picture of the display panel 10 with a curvature parameter not equal to the first preset parameter is analyzed in advance to obtain the second compensation parameter, and the second compensation parameter is stored in the second memory 32. Therefore, when the second controller 22 determines that the display panel 10 is not equal to the first preset parameter according to the voltage signal, the display panel 10 is compensated by using the second compensation parameter, and the display panel 10 with a curvature parameter not equal to the first preset parameter can display normally after the display panel 10 is compensated by using the second compensation parameter.

[0068] In the embodiment, the display panel 10 is taken as an example to be described with two curvatures. When the curvature parameter of the display panel 10 is equal to the first preset parameter, the curvature of the display panel 10 is taken as one of the two curvatures; when the curvature parameter of the display panel 10 is not equal to the first preset parameter, the curvature of the display panel 10 is taken as the other of the two curvatures. In the embodiment, the display panel 10 is taken as an example to be described with the display panel 10 as a flat panel when the curvature parameter of the display panel 10 is equal to the first preset parameter, and the display panel 10 as a curved panel when the curvature parameter of the display panel 10 is not equal to the first preset parameter. Therefore, when the curvature parameter of the display panel 10 is equal to the first preset parameter, the second controller 22 can compensate by using the first compensation parameter, so that the display panel 10 can normally display in the flat panel state; when the curvature parameter of the display panel 10 is not equal to the first preset parameter, the second controller 22 can compensate by using the second compensation parameter, so that the display panel 10 can normally display in the curved panel state. It can be seen that, no matter which of the two curvatures the curvature of the display panel 10 in the display device 1 provided in the embodiment is, the second controller 22 can compensate the display panel 10 by using the first compensation parameter in the first memory 31 or the second compensation parameter in the second memory 32, so that the display panel 10 can normally display. Therefore, no matter whether the display panel 10 in the embodiment is applied as a flat panel or a curved panel, the display panel 10 can normally display. It can be seen that, the display panel 10 in the display device 1 in the embodiment can be used for flat panels and curved panels. Therefore, it is achieved that the flat display panel and the curved display panel can be directly shared.

[0069] It can be understood that, in other possible embodiments, the state of the display panel 10 is a curved panel when the second controller 22 compensates by using the first compensation parameter, and the state of the display panel 10 is also a curved panel when the second controller 22 compensates by using the second compensation parameter, and the first compensation parameter is not equal to the second compensation parameter, and the curvature of the display panel 10 when the second controller 22 compensates by using the first compensation parameter is not equal to the curvature of the display panel 10 when the second controller 22 compensates by using the second compensation parameter, which is not limited in the application.

[0070] It can be understood that, in other possible embodiments, the state of the display panel 10 is a curved panel when the second controller 22 compensates by using the first compensation parameter, and the state of the display panel 10 is also a curved panel when the second controller 22 compensates by using the second compensation parameter, and the first compensation parameter is not equal to the second compensation parameter, and the curvature of the display panel 10 when the second controller 22 compensates by using the first compensation parameter is not equal to the curvature of the display panel 10 when the second controller 22 compensates by using the second compensation parameter, which is not limited in the application.

[0071] Please refer to Figure 1 and Figure 2 , the display device 1 includes a connector 50, the first controller 21 is electrically connected to the second controller 22 through the connector 50, the connector 50 includes a first pin 51, the first pin 51 is electrically connected to the second controller 22, the first controller 21 transmits a first voltage signal to the second controller 22 through the first pin 51 of the connector 50, and the second controller 22 performs display compensation on the display panel 10 according to the first voltage signal using the first compensation parameter; the first controller 21 also transmits a second voltage signal to the second controller 22 through the first pin 51 of the connector 50, and the second controller 22 performs display compensation on the display panel 10 according to the second voltage signal using the second compensation parameter.

[0072] Wherein, the first voltage signal is a low voltage signal, the second voltage signal is a high voltage signal, the voltage of the first voltage signal includes but is not limited to 0V, and the voltage of the second voltage signal includes but is not limited to 3.3V. It can be understood that in other possible embodiments, the first voltage signal can also be a high voltage signal, and the second voltage signal can also be a low voltage signal, which is not limited in the present application.

[0073] Please refer to Figure 1 and Figure 2 , the display device 1 further includes a driver 60, the driver 60 is electrically connected to the first memory 31, the second memory 32 and the display panel 10 respectively, the driver 60 is used to drive the display panel 10 through the first compensation parameter, and the driver 60 is also used to drive the display panel 10 through the second compensation parameter.

[0074] In the embodiment, the second controller 22 is taken as a timing controller (TCON, Timing Controller), and the driver 60 is taken as a data signal driver (Source Driver) for example. The driver 60 is used to generate a data signal according to the image data sent by the second controller 22, and drive the pixel units of the display panel 10 to work according to the data signal, so as to realize the function of display picture. It can be understood that in other possible embodiments, the second controller 22 and the driver 60 can also be other types of devices, which are not limited in the present application.

[0075] The driver 60 is electrically connected to the first memory 31, the second memory 32 and the display panel 10 respectively. When the curvature parameter of the display panel 10 is equal to the first preset parameter, the image data generated by the second controller 22 is superimposed with the first compensation parameter in the first memory 31, the driver 60 converts the superimposed data of the image data and the first compensation parameter into a first data signal, and drives the pixel unit of the display panel 10 according to the first data signal; when the curvature parameter of the display panel 10 is not equal to the first preset parameter, the image data generated by the second controller 22 is superimposed with the second compensation parameter in the second memory 32, the driver 60 converts the superimposed data of the image data and the second compensation parameter into a second data signal, and drives the pixel unit of the display panel 10 according to the second data signal.

[0076] Please refer to Figure 1 , the display device 1 further comprises a first connecting piece 71, the first connecting piece 71 is electrically connected to the second controller 22 and the first memory 31, and the second controller 22 reads the first compensation parameter by using the first connecting piece 71 according to the first voltage signal.

[0077] Please refer to Figure 1 , the display device 1 further comprises a second connecting piece 72, the second connecting piece 72 is electrically connected to the second controller 22 and the second memory 32, and the second controller 22 reads the second compensation parameter by using the second connecting piece 72 according to the second voltage signal.

[0078] Specifically, the second controller 22 is electrically connected to the first connecting piece 71 and the second connecting piece 72, the first connecting piece 71 is electrically connected to the first memory 31, and the second connecting piece 72 is electrically connected to the second memory 32. The second controller 22 is configured to generate a first chip select signal CS1, and the second controller 22 transmits the first chip select signal CS1 to the first memory 31 according to the first connecting piece 71; the second controller 22 is further configured to generate a second chip select signal CS2, and the second controller 22 transmits the second chip select signal CS2 to the second memory 32 according to the second connecting piece 72.

[0079] Specifically, when the curvature parameter of the display panel 10 is equal to the first preset parameter, the first chip select signal CS1 generated by the second controller 22 is a low-level signal, the second chip select signal CS2 generated by the second controller 22 is a high-level signal, the second controller 22 reads the first compensation parameter in the first memory 31, and performs display compensation on the display panel 10 according to the first compensation parameter; when the curvature parameter of the display panel 10 is not equal to the second preset parameter, the first chip select signal CS1 generated by the second controller 22 is a high-level signal, the second chip select signal CS2 generated by the second controller 22 is a low-level signal, the second controller 22 reads the second compensation parameter in the second memory 32, and performs display compensation on the display panel 10 according to the second compensation parameter.

[0080] Please refer again to Figure 1 Specifically, the display panel 10 has a display area 14 and a non-display area 15, the non-display area 15 is arranged around the display area 14, and the display panel 10 control circuit is arranged in the non-display area 15. The control circuit at least includes the first controller 21, the second controller 22, the first memory 31, the second memory 32 and the like.

[0081] The display device 1 further includes a first circuit board 41, a connecting cable 43 and a second circuit board 42. The first circuit board 41, the connecting cable 43 and the second circuit board 42 are all arranged in the non-display area 15 of the display panel 10. One end of the first circuit board 41 is electrically connected to one end of the second circuit board 42 through the connecting cable 43, the second controller 22 is arranged on the first circuit board 41, and the first memory 31 and the second memory 32 are arranged on the second circuit board 42. In the schematic diagram of the embodiment, the number of the circuit boards 42 is two, and the two circuit boards 42 are arranged at intervals. Correspondingly, the number of the connecting cables 43 is two. The first circuit board 41 is electrically connected to one second circuit board 42 through one connecting cable 43, and the first circuit board 41 is also electrically connected to another second circuit board 42 through another connecting cable 43.

[0082] Optionally, the first circuit board 41 and the second circuit board 42 can be, but are not limited to, flexible circuit boards (FPC, Flexible Printed Circuit). Optionally, the connecting cable 43 can be a flexible flat cable (FFC, Flexible Flat Cable).

[0083] The application further provides a compensation method of a display panel, which can be applied to the display panel 10 described above. The display device 1 described above can execute the compensation method of a display panel described below.

[0084] Please refer to Figures 1 to 3 , Figure 3 FIG. 1 is a flowchart of a compensation method of a display panel according to an embodiment of the application. The application provides a compensation method of a display panel 10, which is applied to the display panel 10. The compensation method of the display panel 10 includes but is not limited to steps S100, S200, S300 and S400, and the detailed description of steps S100, S200, S300 and S400 is as follows.

[0085] S100: Obtain a curvature parameter of the display panel 10.

[0086] The curvature parameter includes a first curvature parameter and a second curvature parameter. The first curvature parameter is different from the second curvature parameter. In an embodiment, the display panel 10 is a flat panel at the first curvature parameter, and the display panel 10 is a curved panel at the second curvature parameter. It can be understood that in other embodiments, the display panel 10 is a curved panel at the first curvature parameter, and the display panel 10 is a flat panel at the second curvature parameter. In other embodiments, the display panel 10 is a curved panel at the first curvature parameter, and the display panel 10 is a curved panel at the second curvature parameter, the first curvature parameter is not equal to the second curvature parameter. As long as the first curvature parameter and the second curvature parameter are different, it is acceptable.

[0087] It can be understood that in other embodiments, the display panel 10 is a curved panel at the first curvature parameter, the display panel 10 is a curved panel at the second curvature parameter, and the first curvature parameter is not equal to the second curvature parameter, that is, the curvature of the display panel 10 at the first curvature parameter is not equal to the curvature of the display panel 10 at the second curvature parameter, which is not limited in the application.

[0088] S200: Determine whether the curvature parameter is equal to a first preset parameter.

[0089] The state of the display panel 10 at the first preset parameter includes but is not limited to a curved panel or a flat panel.

[0090] S300: When the curvature parameter is equal to the first preset parameter, a first compensation parameter is used to perform display compensation on the display panel 10.

[0091] The first compensation parameter includes, but is not limited to, Demura compensation data generated according to a Demura compensation algorithm corresponding to Mura data.

[0092] In the embodiment, the first compensation parameter is Demura compensation data of the display panel 10 in a flat state. Specifically, when the display panel 10 is in a flat state, if the display panel 10 has Mura, a camera is used to capture a plurality of gray scale pictures, and then the color distribution characteristics of the pixels in the display panel 10 are analyzed according to the data collected by the camera, and Mura data is identified according to an algorithm. Demura compensation data is generated according to a Demura compensation algorithm corresponding to the Mura data, and Mura compensation can be performed by using the Demura compensation data (i.e., the first compensation parameter is used to compensate for Mura). The camera can be, but is not limited to, a high-resolution and high-precision charge-coupled device (CCD).

[0093] With the continuous development of e-sports display screen products, high-end e-sports display screens will use curved display screens. The LCD panel used in the curved display screen will have curved Mura due to the bending. Since the position and shape of the Mura caused by the bending of the curved display screen are fixed, a plurality of display panels 10 with less flat Mura or having undergone flat Demura are selected, the plurality of display panels 10 are assembled on curved backlights with different R1000 (curvatures), the Mura of the curved display panel 10 is captured, and the assembly and capture are repeated multiple times. Then, the average Mura data is obtained, and the obtained Mura data is superimposed in the process of Demura of the flat display panel 10, so that the Mura under the curved display panel 10 can be realized by using the flat Demura method.

[0094] Optionally, the curvature of the curved backlight includes, but is not limited to, R1000.

[0095] In other embodiments, the first compensation parameter is Demura compensation data of the display panel 10 in a flat state superimposed with Demura compensation data of the display panel 10 in a curved state, which is not limited in the present application.

[0096] S400: When the curvature parameter is not equal to the first preset parameter, a second compensation parameter is used to compensate for the display panel 10.

[0097] Optionally, as described above, the second compensation parameter includes, but is not limited to, Demura compensation data generated according to a Demura compensation algorithm corresponding to Mura data.

[0098] In the embodiment, the second compensation parameter is Demura compensation data when the display panel 10 is in the curved state. In other embodiments, the second compensation parameter can be Demura compensation data when the display panel 10 is in the flat state superimposed with Demura compensation data when the display panel 10 is in the flat state, which is not limited in the application.

[0099] The second compensation parameter includes a first sub-parameter, please refer to Figure 4 , Figure 4 is Figure 3 The flowchart included in S400 in the compensation method of the display panel in the embodiment is provided in FIG. 4. The “compensate the display panel 10 with the second compensation parameter when the curvature parameter is not equal to the first preset parameter” in S400 includes:

[0100] S410: compensate the display panel 10 with the first sub-parameter when the curvature parameter is not equal to the first preset parameter and the curvature parameter is equal to a second preset parameter.

[0101] The second preset parameter is not equal to the first preset parameter.

[0102] The second compensation parameter further includes a second sub-parameter, please refer to Figure 5 , Figure 5 is Figure 3 The flowchart included in S400 in the compensation method of the display panel in another embodiment is provided in FIG. 5. The “compensate the display panel 10 with the second compensation parameter when the curvature parameter is not equal to the first preset parameter” in S400 further includes:

[0103] S420: compensate the display panel 10 with the second sub-parameter when the curvature parameter is not equal to the first preset parameter and the curvature parameter is equal to a third preset parameter.

[0104] The third preset parameter is not equal to the second preset parameter, and the second sub-parameter is not equal to the first sub-parameter.

[0105] Specifically, please refer to Figure 6 , Figure 6is a schematic view of the connection between the first controller and the second controller provided by another embodiment of the present application. The connector 50 further comprises a second pin 52 electrically connected to the second controller 22. The first controller 21 transmits a third voltage signal to the second controller 22 through the second pin 52 of the connector 50, and the first controller 21 further transmits a fourth voltage signal to the second controller 22 through the second pin 52 of the connector 50. The third voltage signal is a low-level voltage signal, and the fourth voltage signal is a high-level voltage signal. The voltage of the third voltage signal includes but is not limited to 0V, and the voltage of the fourth voltage signal includes but is not limited to 3.3V. It can be understood that in other possible embodiments, the third voltage signal can also be a high-level voltage signal, and the fourth voltage signal can also be a low-level voltage signal, which is not limited in the present application.

[0106] In the embodiments provided by the present application, the first controller 21 transmits the first signal to the second controller 22 through the first pin 51, and the first controller 21 transmits the third signal to the second controller 22 through the second pin 52. The second controller 22 reads the first compensation parameter to perform display compensation on the display panel 10. The first controller 21 transmits the first signal to the second controller 22 through the first pin 51, and the first controller 21 transmits the fourth signal to the second controller 22 through the second pin 52. The second controller 22 reads the first sub-parameter to perform display compensation on the display panel 10. The first controller 21 transmits the second signal to the second controller 22 through the first pin 51, and the first controller 21 transmits the third signal to the second controller 22 through the second pin 52. The second controller 22 reads the second sub-parameter to perform display compensation on the display panel 10. In other embodiments, the display device 1 can be further provided with a third self-parameter. When the first controller 21 transmits the second signal to the second controller 22 through the first pin 51, and the first controller 21 transmits the fourth signal to the second controller 22 through the second pin 52, the second controller 22 reads the third sub-parameter to perform display compensation on the display panel 10.

[0107] According to the bending of the display panel 10 with different curvatures, the display device 1 can be provided with multiple compensation parameters, and the second controller 22 can read different compensation parameters to perform display compensation on the display panel 10.

[0108] Please refer to Figure 7 , Figure 7is a part structure schematic diagram of a display device provided by another embodiment of the present application. In other embodiments, the display device 1 further comprises a third memory 33 and a fourth memory 34, the second memory 32 is used to store a first sub-parameter, the third memory 33 is used to store a second sub-parameter, and the fourth memory 34 is used to store a third sub-parameter.

[0109] Referring to Figure 8 , Figure 8 is Figure 3 A flowchart included in S300 in a compensation method of a display panel in an embodiment is provided. Before the step of "when the curvature parameter is equal to the first preset parameter, compensating the display panel 10 by using a first compensation parameter" in S300, the following steps are further included.

[0110] S11: When the curvature parameter of the display panel 10 is the first preset parameter, a test picture when the display panel 10 loads test data is obtained.

[0111] S12: Determine whether the display parameters of each region of the test picture are consistent, wherein the display parameters at least include display brightness.

[0112] S13: When the display parameters of part of the regions of the test picture are inconsistent with the display parameters of other regions, the first compensation parameter is obtained according to the difference between the display parameters of the part of the regions and the display parameters of the other regions.

[0113] In an embodiment, the state of the display panel 10 when the second controller 22 compensates by using the first compensation parameter is a flat panel. Determining whether the display parameters of each region of the test picture are consistent includes that the display parameters of each region of the test picture are in the same interval or equal.

[0114] Referring to Figure 9 , Figure 9 is a region division schematic diagram of a display panel provided by an embodiment of the present application. The display panel 10 comprises a first region 111, a second region 112 and a third region 113. When the display parameters of the first region 111, the second region 112 and the third region 113 are consistent, the display panel 10 does not need to be compensated. When the display parameters of the first region 111, the second region 112 and the third region 113 are inconsistent, the first compensation parameter is obtained according to the difference between the display parameters of the first region 111, the second region 112 and the third region 113. The following takes the display brightness as an example for illustration.

[0115] Specifically, the camera is used to capture the test picture of the display panel 10 when the test data is loaded, and the gray scale values of the first area 111, the second area 112 and the third area 113 of the display panel 10 are compared with the preset gray scale values under normal working condition. If the gray scale value of one of the areas is greater than or less than the preset gray scale value, it is determined that Mura exists in the area. The Mura data of the area of the display panel 10 is calculated by average value, and the first compensation parameter is calculated by the average Mura data.

[0116] In another embodiment, the state of the display panel 10 when the second controller 22 compensates using the first compensation parameter is a curved panel.

[0117] Please refer to Figure 10 , Figure 10 is Figure 3 The flowchart included in S400 in the compensation method flow of the display panel in another embodiment is provided. Before the step S300, the "when the curvature parameter is equal to the first preset parameter, the display panel 10 is compensated by the first compensation parameter" can further include:

[0118] S21: Obtain the test picture of a plurality of display panels 10.

[0119] S22: Determine the Mura data of each display panel 10 to obtain a plurality of Mura data.

[0120] S23: Obtain the average Mura data according to the plurality of Mura data, wherein the first compensation parameter corresponds to the average Mura data.

[0121] When the number of display panels 10 is multiple, the curvature of each display panel 10 is the same (the preset curvature in this embodiment), and the following describes in detail how to determine the first compensation parameter according to each display panel 10.

[0122] Obtain the test picture of a plurality of display panels 10 with the preset curvature;

[0123] Divide the test picture into a plurality of areas;

[0124] Compare each area in the test picture, and the area with Mura is a to-be-compensated sub-area;

[0125] Take the union of all to-be-compensated sub-areas of the display panel with Mura as a to-be-compensated area;

[0126] The first compensation parameter is determined according to Mura determination of the to-be-compensated region, and display compensation is performed on the to-be-compensated region according to the first compensation parameter.

[0127] Please refer to Figure 11 , Figure 11 is a region division overlap schematic diagram of a plurality of display panels provided by the embodiment of the present application. In the present embodiment, the number of display panels 10 is taken as three for example. Each display panel includes at least one to-be-compensated sub-region. It can be understood that in the present embodiment, each display panel includes one to-be-compensated sub-region for example, and in other embodiments, the display panel includes at least one to-be-compensated sub-region. The three to-be-compensated sub-regions in the present embodiment are named as to-be-compensated sub-region 114, to-be-compensated sub-region 115 and to-be-compensated sub-region 116. Among them, the first display panel 10 has the to-be-compensated sub-region 114, the second display panel 10 has the to-be-compensated sub-region 115, and the third display panel 10 has the to-be-compensated sub-region 116. The first compensation parameter is calculated according to the display parameters of the to-be-compensated sub-region 114, the to-be-compensated sub-region 115 and the to-be-compensated sub-region 116. The display parameters are taken as display brightness for example below.

[0128] Specifically, a camera is used to shoot a test picture when each display panel 10 loads test data, and each display panel 10 is divided into regions on the picture, and the gray scale values of each region of each display panel 10 are compared with preset gray scale values under normal working conditions. If the gray scale value of a region of one of the display panels 10 is greater than or less than the preset gray scale value, it is determined that Mura exists in the region. Please refer again to Figure 11 , the to-be-compensated sub-region 114 of the first display panel 10, the to-be-compensated sub-region 115 of the second display panel 10 and the to-be-compensated sub-region 116 of the third display panel 10 have Mura, and the Mura data of the to-be-compensated sub-region 114, the to-be-compensated sub-region 115 and the to-be-compensated sub-region 114 are merged and combined, and the first compensation parameter is calculated through the merged Mura data.

[0129] It should be noted that the second compensation parameter and the first sub-parameter, the second sub-parameter and the third sub-parameter contained therein are obtained by using the same calculation method as the first compensation parameter, and the present application will not be repeated.

[0130] The above is part of the embodiments of the present application. It should be noted that for ordinary skilled persons in the technical field, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered within the protection scope of the present application.

Claims

1. A compensation method of a display panel, applied to a display panel, characterized in that, The method comprises: obtaining a curvature parameter of the display panel; determining whether the curvature parameter is equal to a first preset parameter; when the curvature parameter is equal to the first preset parameter, performing display compensation on the display panel by using a first compensation parameter; and when the curvature parameter is not equal to the first preset parameter, performing compensation on the display panel by using a second compensation parameter; wherein the first compensation parameter is Demura compensation data when the display panel is in a flat state, and when the display panel is in a flat state, if the display panel has Mura, a plurality of gray scale pictures are captured by a camera, and then the distribution characteristics of pixel colors in the display picture are analyzed according to the detailed collected data, and Mura data is identified according to an algorithm, and Demura compensation data is generated according to the Demura compensation algorithm corresponding to the Mura data; a plurality of display panels that have undergone flat Demura are selected, the plurality of display panels are assembled on a curved backlight with different curvatures, Mura of the display screen of the curved surface is captured, and the disassembly and recapturing are repeated multiple times to obtain average Mura, and the obtained Mura data is superimposed in the process of flat panel Demura, so that the Mura under the curved surface can be realized by the flat Demura method.

2. The compensation method of a display panel according to claim 1, wherein, The second compensation parameter comprises a first sub-parameter, and when the curvature parameter is not equal to the first preset parameter, the second compensation parameter is used to compensate the display panel, which comprises: when the curvature parameter is not equal to the first preset parameter and the curvature parameter is equal to a second preset parameter, the first sub-parameter is used to compensate the display panel.

3. The compensation method of a display panel according to claim 1, wherein, The second compensation parameter further comprises a second sub-parameter, and when the curvature parameter is not equal to the first preset parameter, the second compensation parameter is used to compensate the display panel, which further comprises: when the curvature parameter is not equal to the first preset parameter and the curvature parameter is equal to a third preset parameter, the second sub-parameter is used to compensate the display panel.

4. The compensation method of a display panel according to claim 1, wherein, When the curvature parameter is equal to the first preset parameter, the display panel is compensated by using the first compensation parameter, which comprises: when the curvature parameter of the display panel is the first preset parameter, a test picture is obtained when the display panel loads test data; determining whether the display parameters of each region of the test picture are consistent, wherein the display parameters at least include display brightness; when the display parameters of part of the regions are inconsistent with the display parameters of other regions, the first compensation parameter is obtained according to the difference between the display parameters of the part of the regions and the display parameters of the other regions.

5. The compensation method of a display panel according to claim 4, wherein, When the curvature parameter is equal to the first preset parameter, the display panel is compensated by using the first compensation parameter, which comprises: obtaining the test picture of a plurality of display panels; determining Mura data of each display panel to obtain a plurality of Mura data; obtaining average Mura data according to the plurality of Mura data, wherein the first compensation parameter corresponds to the average Mura data; and Compensate the display panel with the first compensation parameter.

6. A display device, characterized by comprising: Comprise: A display panel; A first controller, which acquires a voltage signal representing a curvature parameter of the display panel; A second controller, which determines whether the curvature parameter is equal to a first preset parameter according to the voltage signal; A first memory, which stores a first compensation parameter, and when the curvature parameter is equal to the first preset parameter, the second controller compensates the display panel with the first compensation parameter; And A second memory, which stores a second compensation parameter, and when the curvature parameter is not equal to the first preset parameter, the second controller compensates the display panel with the second compensation parameter; Wherein, the first compensation parameter is Demura compensation data when the display panel is in a flat state, and when the display panel is in a flat state, if the display panel has Mura, a camera is used to shoot a plurality of gray scale pictures, and then the distribution characteristics of pixel colors in the display picture are analyzed according to the detailed collected data, and Mura data is identified according to the algorithm, and Demura compensation data is generated according to the Demura compensation algorithm corresponding to the Mura data; A plurality of display panels with less flat Mura or having been subjected to flat Demura are selected, the plurality of display panels are assembled on a curved backlight with different curvatures, Mura of the display screen of the curved surface is shot, and the disassembly and shooting are repeated multiple times to obtain average Mura, and the obtained Mura data is superimposed in the process of Demura of the flat display panel, so that the Mura under the curved surface can be realized by the flat Demura method.

7. The display device according to claim 6, wherein The display device further comprises: A connector, the connector comprising a first pin, the first pin electrically connecting the second controller, the first controller transmitting a first voltage signal to the second controller through the first pin of the connector, and the second controller compensating the display panel with the first compensation parameter according to the first voltage signal; the first controller also transmits a second voltage signal to the second controller through the first pin of the connector, and the second controller compensates the display panel with the second compensation parameter according to the second voltage signal.

8. The display device according to claim 6, wherein The display device further comprises: A driver, which is electrically connected to the first memory, the second memory and the display panel respectively, and is used for driving the display panel with the first compensation parameter and the second compensation parameter.

9. The display device according to claim 7, wherein The display device further comprises: A first connecting piece, which electrically connects the second controller and the first memory, and the second controller reads the first compensation parameter through the first connecting piece according to the first voltage signal.

10. The display device according to claim 7, wherein The display device further comprises: A second connecting element electrically connects the second controller and the second memory, and the second controller reads the second compensation parameter by using the second connecting element according to the second voltage signal.

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