Display defect compensation method and device, display panel and display equipment

Abstract

The invention discloses a display defect compensation method and device, a display panel and display equipment. The method comprises the following steps: acquiring a first compensation parameter of a target area on the 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 the 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 the source driver and / or the preset number of the gate driving units, and the compensation parameters are adjusted in the partitioned mode. Visibly, according to the application, the partition can be freely adjusted based on the pin serial number of the source driver, and the compensation parameters of different areas can be freely adjusted, so that the Mura phenomenon of the screen can be effectively improved, and the Demura yield can be improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display defect compensation method, device, display panel and display equipment. Background Art

[0002] With the continuous development of Active Matrix Organic Light Emitting Diode (AMOLED) technology, AMOLED screens are becoming more mature. However, the inventors found that the brightness of the existing AMOLED screens at both ends is lower than that in the middle, especially in the case of low grayscale display, the brightness difference is more obvious, and Mura will appear at both ends. Mura refers to the uneven brightness of the display, causing visual defects and seriously affecting the display quality.

[0003] Demura technology is a technology used to improve the Mura phenomenon. However, the current Demura technology is mainly adjusted through configuration registers, and this adjustment method is usually operated on the entire screen surface. When the set parameters are increased to improve the Mura at both ends, problems will occur in the middle area of ​​the screen due to over-compensation. If the parameters are set smaller, although over-compensation in the middle area can be avoided, the Mura phenomenon at both ends cannot be effectively improved because the compensation strength is not enough at this time. Summary of the invention

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

[0005] Therefore, an embodiment of the present invention provides a display defect compensation method, including:

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

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

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

[0009] In a 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 a partition mark;

[0011] Along the direction of the pin number sorting of the source driver, the starting pin number and the ending pin number of the partition are determined according to the size of the area showing the defect on the display panel, and the area number of each area and its corresponding starting pin number and ending pin number are recorded.

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

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

[0014] Along the direction of the pin number sorting of the source driver, determine the starting pin number and the ending pin number of the partition according to the size of the area showing the defect on the display panel;

[0015] Determine the starting gate driving unit sequence number and the ending gate driving unit sequence number of the partition according to the preset number of the gate driving units along the arrangement direction of the gate driving units;

[0016] Record the area number of each area and its corresponding starting pin number, ending pin number, starting gate drive unit and ending gate drive unit.

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

[0018] The compensation parameter adjustment value corresponding to each area is configured in the register.

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

[0020] receiving an update 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 update value in the register.

[0022] On the other hand, an embodiment of the present invention further provides a display defect compensation device, comprising:

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

[0024] an adjustment module, configured to adjust the first compensation parameter according to a pre-configured compensation parameter adjustment value of the target area to obtain a second compensation parameter;

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

[0026] In a 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 a partition mark;

[0028] Along the direction of the pin number sorting of the source driver, the starting pin number and the ending pin number of the partition are determined according to the size of the area showing the defect on the display panel, and the area number of each area and its corresponding starting pin number and ending pin number are recorded.

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

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

[0031] Along the direction of the pin number sorting of the source driver, determine the starting pin number and the ending pin number of the partition according to the size of the area showing the defect on the display panel;

[0032] Determine the starting gate driving unit sequence number and the ending gate driving unit sequence number of the partition according to the preset number of the gate driving units along the arrangement direction of the gate driving units;

[0033] Record the area number of each area and its corresponding starting pin number, ending pin number, starting gate drive unit and ending gate drive unit.

[0034] On the other hand, an embodiment of the present invention further 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 embodiment.

[0035] On the other hand, an embodiment of the present invention further provides a display device, including the display panel described in the above embodiment.

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

[0037] The embodiments of the present invention provide a display defect compensation method, device, display panel and display equipment, which obtain a first compensation parameter of a target area on the display panel; adjust the first compensation parameter according to a pre-configured compensation parameter adjustment value of the target area to obtain a second compensation parameter; and compensate the display data of each pixel in the target area based on the second compensation parameter. Compared with the prior art, the present application partitions the display panel based on the pin number of the source driver and / or the preset number of gate drive units, and adjusts the compensation parameters by partition. It can be seen that the present application can freely adjust the partitions based on the pin number of the source driver, and freely adjust the compensation parameters of different areas, which can effectively improve the screen Mura phenomenon and improve the Demura yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Shown is a flow chart of a display defect compensation method provided by an embodiment of the present invention;

[0039] Figure 2 Shown is a schematic diagram of partitioning a display panel based on the pin numbers of a source driver;

[0040] Figure 3 It is a schematic diagram showing partitioning of a display panel based on the pin numbers of a source driver and the preset number of gate driving units;

[0041] Figure 4 Shown is a schematic structural diagram of a display defect compensation device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The inventors found that the reason why the Mura phenomenon at both ends of the screen cannot be effectively improved is that in the design process of the driving circuit of the AMOLED screen, due to the limitation of spatial routing, it is difficult to make the load of each area consistent. The load here can be understood as the obstruction caused by the combination of electrical components such as equivalent resistance, capacitance and inductance that the signal output from the source driver bears during the transmission process to the pixel. In the direction parallel to the output pin of the source driver, the load is greater towards both ends of the screen. This is because the distribution characteristics of the circuit routing make the signal different from the middle area when it is transmitted to both ends. This difference in load directly leads to different screen brightness. Due to the large load at both ends of the screen, its brightness will be lower than the brightness in the middle, especially in the case of low grayscale display, this brightness difference is more obvious, and Mura will appear at both ends.

[0043] The specific implementation manners of the display defect compensation method, device, display panel and display device provided by the embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

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

[0045] S101, obtaining a first compensation parameter of a target area on a display panel;

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

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

[0048] For each pixel on the display panel, the original compensation parameter and the partition position of each pixel are obtained, the compensation parameter of the pixel is adjusted using the compensation parameter adjustment value corresponding to the area, and the adjusted compensation parameter is applied to the display data of the pixel and output.

[0049] The target area is an 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.

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

[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 mark; determining the starting pin number and the ending pin number of the partition according to the size of the area where the defect is displayed 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 the AMOLED screen, the IC (Integrated Circuit) plays a key role in controlling the display. The source driver pin (Source PIN) of the IC is an important interface 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, which ensures that data can be transmitted in an orderly manner from the driver IC to each part of the display panel, thereby realizing the correct display of the image.

[0053] Given the sequential connection characteristics of the Source PIN and the data line on the display panel, the Source PIN serial number can be used as a natural identifier. Since each PIN corresponds to a data line at a specific position on the display panel, the screen can be divided into different areas in 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 a partition, the area corresponding to the next few PINs can be another partition, and so on. In this way, through the PIN sequence, a clear and easy-to-operate marking method is provided for the partitions in the Source direction of the screen, which is convenient for subsequent targeted analysis, adjustment or optimization of different areas of the screen. For example, when dealing with the uneven brightness problem caused by different loads mentioned above, compensation settings can be made more accurately based on this partition.

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

[0055] Please refer to Figure 2 , configure the IC register to partition the screen along the Source direction, such as setting the starting pin number of the first area to Source a, the ending pin number of the first area to Source b, the ending pin number of the first area to the starting pin number of the second area, the ending pin number of the second area and the starting pin number of the third area to Source c, the ending pin number of the third area and the starting pin number of the fourth area to Source d... The ending pin number of the Mth area is Source n, M≥3; when a pixel is in the jth column, if a≤j<b, the area number index is 1; b≤j<c, the area number index is 2; c≤j<d, the area number index is 3, and so on.

[0056] Flash is a non-volatile memory, and the stored data will not be lost even after the device is powered off. The compensation parameters of the AMOLED screen are important data obtained through preliminary calibration and testing, and need to be stored for a long time so that accurate parameters can be obtained every time the IC is started, so they are stored in Flash.

[0057] Configure the IC register to set the compensation parameter adjustment values ​​for different regions. When the IC is started, the IC reads the compensation parameters from the Flash, and the compensation parameters are recalculated by the compensation parameter adjustment values ​​set by the IC, and act on 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 red, green and blue primary color data respectively, which determine the final color and brightness of each pixel. The recalculated compensation parameters act on these input data to correct and adjust them. For example, if a pixel displays dark green under certain conditions, the compensation parameters will make appropriate gain adjustments to the G_in data to make the green display of the pixel more accurate, thereby optimizing the color reproduction and brightness uniformity of the entire screen and improving the display quality.

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

[0060] Please refer to Figure 3 The process of partitioning the display panel based on the pin number of the source driver and the preset number of gate driving units includes: using the pin number of the source driver as a partition mark; determining the starting pin number and the ending pin number of the partition according to the size of the area where the defect is displayed on the display panel along the direction of the pin number of the source driver; determining the starting gate driving unit number and the ending gate driving unit number of the partition according to the preset number of gate driving units along the arrangement direction 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 , configure the IC register to partition the screen along the Source direction, such as setting the starting pin number of the first area to Source a, the ending pin number of the first area to Source b, the ending pin number of the first area to the starting pin number of the second area, the ending pin number of the second area and the starting pin number of the third area to Source c, the ending pin number of the third area and the starting pin number of the fourth area to Source d... The ending pin number of the Mth area is Source n, M≥3; configure the IC register to set the preset number of gate drive units (i.e., the number of GOA rows), and partition the screen in the GOA direction with the preset number. GOA (Gate-Driver-on-Array) is the gate drive on the array substrate, and the GOA direction refers to the transmission direction of the gate signal on the screen. The gate signal is used to control the switching of pixels and determine when the pixels display data.

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

[0063] Configure the IC register to set the compensation parameter adjustment values ​​for different regions. When the IC is started, the IC reads the compensation parameters from the Flash, and the compensation parameters are recalculated by the compensation parameter adjustment values ​​set by the IC, and act on 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 area in the register, an updated value of the compensation parameter adjustment value for the first area can also be received; the compensation parameter adjustment value corresponding to the first area is replaced with the updated value in the register, so that the user can freely adjust the compensation parameters of different areas.

[0065] In the present application, when determining the specific partitions, the screen partitions can be flexibly configured according to the size of the area where defects are displayed on the display panel, and the compensation parameters of different areas can be freely adjusted, thereby effectively improving the screen Mura phenomenon and improving the Demura yield.

[0066] Figure 4 FIG. 1 is a schematic diagram of the structure of a display defect compensation device provided by an embodiment of the present invention. Figure 4 As shown, the display defect compensation device 10 includes:

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

[0068] An adjustment module 102, configured to adjust the first compensation parameter according to a pre-configured compensation parameter adjustment value of the target area to obtain a second compensation parameter;

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

[0070] In a 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 a partition mark;

[0072] Along the direction of the pin number sorting of the source driver, the starting pin number and the ending pin number of the partition are determined according to the size of the area showing the defect on the display panel, and the area number of each area and its corresponding starting pin number and ending pin number are recorded.

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

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

[0075] Along the direction of the pin number sorting of the source driver, determine the starting pin number and the ending pin number of the partition according to the size of the area showing the defect on the display panel;

[0076] Determine the starting gate driving unit sequence number and the ending gate driving unit sequence number of the partition according to the preset number of the gate driving units along the arrangement direction of the gate driving units;

[0077] Record the area number of each area and its corresponding starting pin number, ending pin number, starting gate drive unit and ending gate drive unit.

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

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

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

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

[0082] An embodiment of the present invention further provides a display panel, comprising 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 embodiment.

[0083] An embodiment of the present invention further provides a display device, comprising the display panel described in the above embodiment.

[0084] The embodiments of the present invention provide a display defect compensation method, device, display panel and display equipment, which obtain a first compensation parameter of a target area on a display panel; adjust the first compensation parameter according to a pre-configured compensation parameter adjustment value of the target area to obtain a second compensation parameter; and compensate the display data of each pixel in the target area based on the second compensation parameter. Compared with the prior art, the present application partitions the display panel based on the pin number of the source driver and / or the preset number of gate drive units, and adjusts the compensation parameters by partition. It can be seen that the present application can freely adjust the partition based on the pin number of the source driver, which can effectively improve the screen Mura phenomenon and improve the Demura yield.

[0085] It should be noted that:

[0086] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0087] Similarly, it should be understood that in order to streamline the present application and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, the various features of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting the following intention: the claimed application requires more features than the features clearly stated in each claim. More specifically, as reflected in the claims below, the inventive aspects are less than all the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the present application.

[0088] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0089] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0090] The various component embodiments of the present application can be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all functions of some or all components in the creation device of the virtual machine according to the embodiment of the present application. The application can also be implemented as a device or device program (e.g., computer program and computer program product) for executing part or all of the methods described herein. Such a program implementing the present application can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0091] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may 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 changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A display defect compensation method, characterized in that: include: Acquire a first compensation parameter of a target area on the display panel; The target area is an 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; Adjusting the first compensation parameter according to the pre-configured compensation parameter adjustment value of the target area to obtain a second compensation parameter; The display data of each pixel in the target area is compensated based on the second compensation parameter.

2. The method according to claim 1, characterized in that: The process of partitioning the display panel based on the pin number of the source driver includes: Use the pin number of the source driver as a partition mark; Along the direction of the pin number sorting of the source driver, the starting pin number and the ending pin number of the partition are determined according to the size of the area showing the defect on the display panel, and the area number of each area and its corresponding starting pin number and ending pin number are recorded.

3. The method according to claim 1, characterized in that: The process of partitioning the display panel based on the pin number of the source driver and the preset number of gate driving units includes: Use the pin number of the source driver as a partition mark; Along the direction of the pin number sorting of the source driver, determine the starting pin number and the ending pin number of the partition according to the size of the area showing the defect on the display panel; Determine the starting gate driving unit sequence number and the ending gate driving unit sequence number of the partition according to the preset number of the gate driving units along the arrangement direction of the gate driving units; Record the area number of each area and its corresponding starting pin number, ending pin number, starting gate drive unit and ending gate drive unit.

4. The method according to claim 2 or 3, characterized in that: The method further comprises: The compensation parameter adjustment value corresponding to each area is configured in the register.

5. The method according to claim 4, characterized in that The method further comprises: receiving an update 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 update value in the register.

6. A display defect compensation device, characterized in that: include: An acquisition module, used for acquiring a first compensation parameter of a target area on a display panel; The target area is an 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; an adjustment module, configured to adjust the first compensation parameter according to a pre-configured compensation parameter adjustment value of the target area to obtain a second compensation parameter; A compensation module is used to compensate the display data of each pixel in the target area based on the second compensation parameter.

7. The device according to claim 6, characterized in that The process of partitioning the display panel based on the pin number of the source driver includes: Use the pin number of the source driver as a partition mark; Along the direction of the pin number sorting of the source driver, the starting pin number and the ending pin number of the partition are determined according to the size of the area showing the defect on the display panel, and the area number of each area and its corresponding starting pin number and ending pin number are recorded.

8. The device according to claim 6, characterized in that The process of partitioning the display panel based on the pin number of the source driver and the preset number of gate driving units includes: Use the pin number of the source driver as a partition mark; Along the direction of the pin number sorting of the source driver, determine the starting pin number and the ending pin number of the partition according to the size of the area showing the defect on the display panel; Determine the starting gate driving unit sequence number and the ending gate driving unit sequence number of the partition according to the preset number of the gate driving units along the arrangement direction of the gate driving units; Record the area number of each area and its corresponding starting pin number, ending pin number, starting gate drive unit and ending gate drive unit.

9. A display panel, characterized in that: It comprises a processor and a light emitting device connected to the processor; the processor is used to execute the display defect compensation method as claimed in any one of claims 1 to 5.

10. A display device, characterized in that: Comprising the display panel as claimed in claim 9.

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