A display defect compensation method and device, display panel and display device

Abstract

The application discloses a display defect compensation method and device, a display panel and display equipment. The method comprises the following steps: obtaining a first compensation parameter of a target area on a display panel; adjusting the first compensation parameter according to a pre-configured compensation parameter adjustment value of the target area to obtain a second compensation parameter; and compensating display data of each pixel in the target area based on the second compensation parameter. Compared with the prior art, the display panel is partitioned based on the pin serial number of a source driver and / or the preset number of a gate driving unit, and the compensation parameter is adjusted in the partition. It can be seen that the application can freely adjust the partition based on the pin serial number of the source driver, and freely adjust the compensation parameter of different areas, so that the screen Mura phenomenon can be effectively improved, and the Demura yield is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display defect compensation method, apparatus, display panel, and display device. Background Technology

[0002] With the continuous development of Active Matrix Organic Light Emitting Diode (AMOLED) technology, AMOLED screens are becoming increasingly mature. However, inventors discovered that existing AMOLED screens have lower brightness at both ends than in the middle, especially in low grayscale displays, where this brightness difference is more pronounced, resulting in the Mura phenomenon at the ends. Mura refers to uneven brightness in the display, causing visual defects and severely affecting display quality.

[0003] Demura technology is designed to improve the Mura phenomenon. However, current Demura technology primarily adjusts settings through configuration registers, which typically operate on the entire screen. When the parameters are increased to improve Mura at the ends, the central area of ​​the screen may experience overcompensation. Conversely, setting the parameters lower avoids overcompensation in the central area, but the Mura phenomenon at the ends remains unresolved due to insufficient compensation. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a display defect compensation method, apparatus, display panel, and display device to solve the problem that the Mura phenomenon of screens in the prior art cannot be effectively improved.

[0005] Therefore, the present invention provides a display defect compensation method, comprising:

[0006] Obtain the first compensation parameter for the target area on the display panel; the target area is the area obtained by partitioning the display panel based on the pin number of the source driver and / or the preset number of gate driving units;

[0007] The first compensation parameter is adjusted according to the pre-configured compensation parameter adjustment value of the target area to obtain the second compensation parameter;

[0008] The display data of each pixel in the target area is compensated based on the second compensation parameter.

[0009] In one possible implementation, the process of partitioning the display panel based on the pin numbers of the source driver includes:

[0010] Use the pin number of the source driver as the partition marker;

[0011] Following the direction of pin numbering of the source driver, determine the starting and ending pin numbers of the partition based on the size of the area displaying the defect on the display panel, and record the area number of each area and its corresponding starting and ending pin numbers.

[0012] In one possible implementation, the process of partitioning the display panel based on the pin numbers of the source drivers and the preset number of gate driving units includes:

[0013] Use the pin number of the source driver as the partition marker;

[0014] Following the direction of the source driver pin numbering, determine the starting and ending pin numbers of the partition based on the size of the area displaying the defect on the display panel;

[0015] Along the arrangement direction of the gate driving units, the starting gate driving unit number and the ending gate driving unit number of the partition are determined according to the preset number of gate driving units.

[0016] Record the region number of each region and its corresponding start pin number, end pin number, start gate drive unit, and end gate drive unit.

[0017] In one possible implementation, the method further includes:

[0018] Configure the compensation parameter adjustment value for each region in the register.

[0019] In one possible implementation, the method further includes:

[0020] Receive the updated value of the compensation parameter adjustment value for the first region;

[0021] The compensation parameter adjustment value corresponding to the first region is replaced with the updated value in the register.

[0022] On the other hand, embodiments of the present invention also provide a display defect compensation device, comprising:

[0023] The acquisition module is used to acquire the first compensation parameter of the target area on the display panel; the target area is the area obtained by partitioning the display panel based on the pin number of the source driver and / or the preset number of gate driving units;

[0024] The adjustment module is used to adjust the first compensation parameter according to the pre-configured compensation parameter adjustment value of the target area to obtain the second compensation parameter;

[0025] The compensation module is used to compensate the display data of each pixel in the target area based on the second compensation parameter.

[0026] In one possible implementation, the process of partitioning the display panel based on the pin numbers of the source driver includes:

[0027] Use the pin number of the source driver as the partition marker;

[0028] Following the direction of pin numbering of the source driver, determine the starting and ending pin numbers of the partition based on the size of the area displaying the defect on the display panel, and record the area number of each area and its corresponding starting and ending pin numbers.

[0029] In one possible implementation, the process of partitioning the display panel based on the pin numbers of the source drivers and the preset number of gate driving units includes:

[0030] Use the pin number of the source driver as the partition marker;

[0031] Following the direction of the source driver pin numbering, determine the starting and ending pin numbers of the partition based on the size of the area displaying the defect on the display panel;

[0032] Along the arrangement direction of the gate driving units, the starting gate driving unit number and the ending gate driving unit number of the partition are determined according to the preset number of gate driving units.

[0033] Record the region number of each region and its corresponding start pin number, end pin number, start gate drive unit, and end gate drive unit.

[0034] On the other hand, embodiments of the present invention also provide a display panel, including a processor and a light-emitting device connected to the processor; the processor is used to execute the display defect compensation method described in the above embodiments.

[0035] On the other hand, embodiments of the present invention also provide a display device, including the display panel described in the above embodiments.

[0036] The beneficial effects of the embodiments of the present invention are as follows:

[0037] This invention provides a display defect compensation method, apparatus, display panel, and display device. The method involves obtaining a first compensation parameter for a target area on the display panel; adjusting the first compensation parameter according to a pre-configured adjustment value for the target area to obtain a second compensation parameter; and compensating the display data of each pixel in the target area based on the second compensation parameter. Compared to existing technologies, this application partitions the display panel based on the pin numbers of the source drivers and / or a preset number of gate driving units, and adjusts the compensation parameters for each partition. Therefore, this application can freely adjust the partitions based on the pin numbers of the source drivers and freely adjust the compensation parameters for different areas, effectively improving screen mura phenomena and increasing demura yield. Attached Figure Description

[0038] Figure 1 The diagram shown is a flowchart of a display defect compensation method provided by an embodiment of the present invention;

[0039] Figure 2 The diagram shows a partitioning of the display panel based on the pin numbers of the source driver.

[0040] Figure 3 The diagram shows a partitioning of the display panel based on the pin numbers of the source drivers and the preset number of gate driving units.

[0041] Figure 4 The figure shown is a schematic diagram of a display defect compensation device provided in an embodiment of the present invention. Detailed Implementation

[0042] The inventors discovered that the reason the Mura phenomenon at both ends of the screen cannot be effectively improved is that, due to space constraints in the AMOLED screen's driving circuit design, it's difficult to achieve a consistent load across all areas. This load can be understood as the resistance exerted by a combination of electrical components—equivalent resistance, capacitance, and inductance—on the signal output from the source driver during transmission to the pixels. The load increases towards both ends of the screen in the direction parallel to the source driver output pins. This is because the distribution characteristics of the circuit traces cause different effects on signal transmission at the ends compared to the middle area. This difference in load directly leads to differences in screen brightness. Due to the higher load at the ends, the brightness is lower than in the middle, especially noticeable in low grayscale displays, resulting in the Mura phenomenon at the ends.

[0043] The specific implementation methods of the display defect compensation method, apparatus, display panel, and display device provided in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] Figure 1The diagram shown is a flowchart of a display defect compensation method provided by an embodiment of the present invention. Figure 1 As shown, the method includes:

[0045] S101. Obtain the first compensation parameter of the target area on the display panel;

[0046] S102. Adjust the first compensation parameter according to the pre-configured compensation parameter adjustment value of the target area to obtain the second compensation parameter;

[0047] S103. Compensate the display data of each pixel in the target area based on the second compensation parameter.

[0048] For each pixel on the display panel, obtain the original compensation parameters and the partition position of each pixel, adjust the compensation parameters of the pixel using the compensation parameter adjustment value corresponding to the region, apply the adjusted compensation parameters to the display data of the pixel and output it.

[0049] The aforementioned target area is obtained by partitioning the display panel based on the pin numbers of the source drivers and / or the preset number of gate driving units.

[0050] Figure 2 A schematic diagram is shown showing how the display panel is partitioned based on the pin numbers of the source driver.

[0051] Please refer to Figure 2 The process of partitioning the display panel based on the pin number of the source driver includes: using the pin number of the source driver as a partition marker; determining the starting pin number and ending pin number of the partition according to the size of the area with display defects on the display panel along the direction of the pin number sorting of the source driver; and recording the area number of each area and its corresponding starting pin number and ending pin number.

[0052] Specifically, in the driving circuit of an AMOLED screen, the integrated circuit (IC) plays a crucial role in controlling the display. The source driver pins of the IC are important interfaces responsible for transmitting data signals to the display panel. These source pins are connected to the data lines on the display panel in a specific order. This sequential connection method is the basic architecture of the entire display signal transmission, ensuring that data can be transmitted orderly from the driver IC to various parts of the display panel, thereby achieving correct image display.

[0053] Given the sequential connection between the source PINs and the data cables on the display panel, the source PIN number serves as a natural identifier. Since each PIN corresponds to a specific data cable location on the display panel, the screen can be divided into different areas along the source direction according to the PIN sequence. For example, the display panel area corresponding to the first few source PINs can be defined as one partition, the area corresponding to the next few PINs can be another partition, and so on. In this way, the PIN sequence provides a clear and easy-to-use marking method for partitioning the screen along the source direction, facilitating subsequent targeted analysis, adjustment, or optimization of different areas of the screen. For instance, when dealing with the aforementioned issue of uneven brightness caused by varying loads, compensation settings can be more accurately implemented based on this partitioning.

[0054] Source direction: This refers to the direction in which the pin numbers of the source driver are arranged, and it indicates the direction in which data signals are transmitted from the source driver to the pixel unit. In this direction, the data signals control the display content of each pixel, such as color and brightness information.

[0055] Please refer to Figure 2 Configure the IC registers to partition the screen along the Source direction. For example, the starting pin number of the first region can be set to Source a, the ending pin number of the first region to Source b, the ending pin number of the first region to the starting pin number of the second region, the ending pin number of the second region and the starting pin number of the third region to Source c, the ending pin number of the third region and the starting pin number of the fourth region to Source d, and so on, with the ending pin number of the Mth region being Source n, where M≥3. When a pixel is in the j-th column, if a≤j<b, the region number index is 1; if b≤j<c, the region number index is 2; if c≤j<d, the region number index is 3, and so on.

[0056] Flash memory is a type of non-volatile memory that retains its data even when the device is powered off. The compensation parameters for AMOLED screens are crucial data obtained through prior calibration and testing, and they need to be stored long-term so that accurate parameters can be obtained each time the IC is powered on. Therefore, they are stored in Flash memory.

[0057] Configure the IC registers to set the compensation parameter adjustment values ​​for different regions. When the IC starts up, it reads the compensation parameters from the Flash memory. After the compensation parameters are recalculated using the adjustment values ​​set by the IC, they are applied to the input display data R_in, G_in, and B_in, and output as R_out, G_out, and B_out.

[0058] R_in, G_in, and B_in represent the input data for the three primary colors of red, green, and blue, respectively, which determine the final color and brightness displayed by each pixel. The recalculated compensation parameters are applied to these input data to correct and adjust them. For example, if a pixel displays green too darkly under certain conditions, the compensation parameters will adjust the gain of the G_in data appropriately, making the green display of that pixel more accurate, thereby optimizing the color reproduction and brightness uniformity of the entire screen and improving display quality.

[0059] Figure 3 A schematic diagram is shown showing how a display panel is partitioned based on the pin numbers of the source drivers and the preset number of gate driving units.

[0060] Please refer to Figure 3 The process of partitioning the display panel based on the pin numbers of the source drivers and the preset number of gate driving units includes: using the pin numbers of the source drivers as partition markers; determining the starting and ending pin numbers of the partition according to the size of the area with display defects on the display panel, along the direction of the pin numbering of the source drivers; determining the starting and ending gate driving unit numbers of the partition according to the preset number of gate driving units, along the direction of the arrangement of the gate driving units; and recording the area number of each area and its corresponding starting pin number, ending pin number, starting gate driving unit, and ending gate driving unit.

[0061] Please refer to Figure 3 The IC registers are configured to partition the screen along the Source direction. For example, the starting pin number of region 1 can be set to Source a, the ending pin number to Source b, the ending pin number to the starting pin number of region 2, the ending pin number to the starting pin number of region 3 and the ending pin number to Source c, the ending pin number to the starting pin number of region 4 and the ending pin number to Source d, and so on, until the ending pin number to Source n for region M, where M ≥ 3. The IC registers are also configured to set the preset number of gate drive units (i.e., the number of GOA rows), partitioning the screen along the GOA direction with this preset number. GOA (Gate-Driver-on-Array) refers to the gate drive on the array substrate, and the GOA direction refers to the direction of gate signal transmission on the screen. Gate signals are used to control the switching of pixels, determining when a pixel displays data.

[0062] When a pixel is in row i and column j, the region number is represented by index(M, N), where M is the value as shown above, and N = int(i / space). Here, space represents the preset number of gate drive units, i.e., the number of GOA rows corresponding to each region when partitioning in the GOA direction. For example, if the pixel is in row 5 and space is set to 3, then N = int(5 / 3) = 2. If the pixel is in row 7, then N = int(7 / 3) = 3.

[0063] Configure the IC registers to set the compensation parameter adjustment values ​​for different regions. When the IC starts up, it reads the compensation parameters from the Flash memory. After the compensation parameters are recalculated using the adjustment values ​​set by the IC, they are applied to the input display data R_in, G_in, and B_in, and output as R_out, G_out, and B_out.

[0064] In some embodiments, after configuring the compensation parameter adjustment value corresponding to each region in the register, the updated value of the compensation parameter adjustment value for the first region can also be received; the compensation parameter adjustment value corresponding to the first region is replaced with the updated value in the register, so that the user can freely adjust the compensation parameters for different regions.

[0065] In this application, when determining the specific partitions, the screen partitions can be flexibly configured according to the size of the area with display defects on the display panel, and the compensation parameters for different areas can be freely adjusted. Therefore, the screen Mura phenomenon can be effectively improved and the Demura yield can be increased.

[0066] Figure 4 The diagram shown is a schematic representation of a display defect compensation device according to an embodiment of the present invention. Figure 4 As shown, the defect compensation device 10 includes:

[0067] The acquisition module 101 is used to acquire the first compensation parameter of the target area on the display panel; the target area is the area obtained by partitioning the display panel based on the pin number of the source driver and / or the preset number of gate driving units;

[0068] The adjustment module 102 is used to adjust the first compensation parameter according to the pre-configured compensation parameter adjustment value of the target area to obtain the second compensation parameter;

[0069] The compensation module 103 is used to compensate the display data of each pixel in the target area based on the second compensation parameter.

[0070] In one possible implementation, the process of partitioning the display panel based on the pin numbers of the source driver includes:

[0071] Use the pin number of the source driver as the partition marker;

[0072] Following the direction of pin numbering of the source driver, determine the starting and ending pin numbers of the partition based on the size of the area displaying the defect on the display panel, and record the area number of each area and its corresponding starting and ending pin numbers.

[0073] In one possible implementation, the process of partitioning the display panel based on the pin numbers of the source drivers and the preset number of gate driving units includes:

[0074] Use the pin number of the source driver as the partition marker;

[0075] Following the direction of the source driver pin numbering, determine the starting and ending pin numbers of the partition based on the size of the area displaying the defect on the display panel;

[0076] Along the arrangement direction of the gate driving units, the starting gate driving unit number and the ending gate driving unit number of the partition are determined according to the preset number of gate driving units.

[0077] Record the region number of each region and its corresponding start pin number, end pin number, start gate drive unit, and end gate drive unit.

[0078] In one possible implementation, the device further includes:

[0079] The configuration module is used to configure the compensation parameter adjustment value for each region in the register.

[0080] In one possible implementation, the device further includes:

[0081] The configuration module is further configured to receive an updated value for the compensation parameter adjustment value of the first region; and to replace the compensation parameter adjustment value corresponding to the first region with the updated value in the register.

[0082] This invention also provides a display panel, including a processor and a light-emitting device connected to the processor; the processor is used to execute the display defect compensation method described in the above embodiments.

[0083] This invention also provides a display device, including the display panel described in the above embodiments.

[0084] This invention provides a display defect compensation method, apparatus, display panel, and display device. The method involves obtaining a first compensation parameter for a target area on the display panel; adjusting the first compensation parameter according to a pre-configured adjustment value for the target area to obtain a second compensation parameter; and compensating the display data of each pixel in the target area based on the second compensation parameter. Compared to existing technologies, this application partitions the display panel based on the pin numbers of the source drivers and / or a preset number of gate driving units, and adjusts the compensation parameters for each partition. Therefore, this application can freely adjust the partitions based on the pin numbers of the source drivers, effectively improving screen mura phenomena and increasing demura yield.

[0085] It should be noted that:

[0086] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0087] Similarly, it should be understood that, in order to simplify this application and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of this application, various features of this application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0088] Those skilled in the art will understand that modules in the device of the embodiments can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiments can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components. Except where at least some of such features and / or processes or units are mutually exclusive, any combination can be used to combine all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or device so disclosed. Unless expressly stated otherwise, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0089] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0090] The various component embodiments of this application can be implemented in hardware, or as software modules running on one or more processors, or a combination thereof. Those skilled in the art will understand that microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all of the functions of some or all of the components in the virtual machine creation apparatus according to embodiments of this application. This application can also be implemented as a device or apparatus program (e.g., a computer program and computer program product) for performing part or all of the methods described herein. Such an implementation of this application can be stored on a computer-readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.

[0091] It should be noted that the above embodiments are illustrative of this application and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0092] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for compensating for display defects, characterized in that, include: Obtain the first compensation parameter for the target area on the display panel; The target area is a region obtained by dividing the display panel into sections based on the pin numbers of the source drivers and the preset number of gate driving units. The first compensation parameter is adjusted according to the pre-configured compensation parameter adjustment value of the target area to obtain the second compensation parameter; The display data of each pixel in the target area is compensated based on the second compensation parameter; The process of partitioning the display panel based on the pin numbers of the source drivers and the preset number of gate driving units includes: Use the pin number of the source driver as the partition marker; Following the direction of the source driver pin numbering, determine the starting and ending pin numbers of the partition based on the size of the area displaying the defect on the display panel; Along the arrangement direction of the gate driving units, the starting gate driving unit number and the ending gate driving unit number of the partition are determined according to the preset number of gate driving units. Record the region number of each region and its corresponding start pin number, end pin number, start gate drive unit, and end gate drive unit.

2. The method according to claim 1, characterized in that, The method further includes: Configure the compensation parameter adjustment value for each region in the register.

3. The method according to claim 2, characterized in that, The method further includes: Receive the updated value of the compensation parameter adjustment value for the first region; The compensation parameter adjustment value corresponding to the first region is replaced with the updated value in the register.

4. A defect compensation device for display, characterized in that, include: The acquisition module is used to acquire the first compensation parameters of the target area on the display panel; The target area is a region obtained by dividing the display panel into sections based on the pin numbers of the source drivers and the preset number of gate driving units. The adjustment module is used to adjust the first compensation parameter according to the pre-configured compensation parameter adjustment value of the target area to obtain the second compensation parameter; The compensation module is used to compensate the display data of each pixel in the target area based on the second compensation parameter; The process of partitioning the display panel based on the pin numbers of the source drivers and the preset number of gate driving units includes: Use the pin number of the source driver as the partition marker; Following the direction of the source driver pin numbering, determine the starting and ending pin numbers of the partition based on the size of the area displaying the defect on the display panel; Along the arrangement direction of the gate driving units, the starting gate driving unit number and the ending gate driving unit number of the partition are determined according to the preset number of gate driving units. Record the region number of each region and its corresponding start pin number, end pin number, start gate drive unit, and end gate drive unit.

5. A display panel, characterized in that, It includes a processor and a light-emitting device connected to the processor; the processor is used to perform the display defect compensation method as described in any one of claims 1 to 3.

6. A display device, characterized in that, Includes the display panel as described in claim 5.

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