Aging compensation method and system of display panel, display panel and storage medium

Abstract

The application discloses an aging compensation method and system of a display panel, a display panel and a storage medium, wherein the aging compensation method of the display panel comprises the following steps: an application processor acquires a current use time of a display panel to be compensated in real time; when the current use time reaches a target life attenuation time, a compensation reference voltage value of the display panel to be compensated is determined from a preset voltage parameter table, and the compensation reference voltage value is sent to a driving chip of the display panel to be compensated for reference voltage value adjustment; according to the target life attenuation time, a current gain parameter of the display panel to be compensated is determined from a preset gain parameter table, current gamma register values of each sub-pixel of the display panel to be compensated are adjusted according to the current gain parameter, adjusted compensation gamma register values of each sub-pixel are obtained, and the adjusted compensation gamma register values are sent to the driving chip for gamma register value adjustment. In the above manner, the display panel of the driving chip without the aging compensation function can be compensated.

Description

Technical Field

[0001] This application relates to the field of display panel technology, and in particular to an aging compensation method, system, display panel, and storage medium for a display panel. Background Technology

[0002] AMOLED (Active Matrix / Organic Light Emitting Diode) is increasingly being used in small and medium-sized consumer electronics due to its inherent advantages such as wide color gamut, high contrast, thinness, and fast response speed.

[0003] Due to the inherent characteristics of OLED materials, some inherent defects of OLED screens are increasingly attracting public attention. One such issue is the long-standing burn-in problem. When an OLED screen displays certain static images for an extended period, the lifespan of the OLED organic materials gradually decreases. Furthermore, the different properties and device structures of the RGB monochrome materials lead to varying rates of luminous efficiency decay. This results in issues such as decreasing brightness and color changes over time, and even the appearance of burn-in marks on icons after prolonged use, all affecting the viewing experience. Chip manufacturers can mitigate this by adding a de-burn-in function (aging compensation) to the display panel's chips. However, when the display panel's chips lack de-burn-in functionality, it becomes difficult for display and terminal manufacturers to resolve these display effect problems. Summary of the Invention

[0004] This application provides a method, system, display panel, and storage medium for aging compensation of a display panel, to perform de-burn compensation on a display panel with a driver chip that does not have a de-burn function.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing an aging compensation method for a display panel, the aging compensation method for a display panel includes: an application processor acquiring the current usage time of the display panel to be compensated in real time; when the current usage time of the display panel to be compensated reaches the target lifetime decay time, determining the compensation reference voltage value of the display panel to be compensated from a preset voltage parameter table, and sending it to the driver chip of the display panel to be compensated, so as to adjust the initial reference voltage value of the display panel to be compensated to the compensation reference voltage value; determining the current gain parameter of the display panel to be compensated from a preset gain parameter table according to the target lifetime decay time; adjusting the current gamma register value of each sub-pixel of the display panel to be compensated according to the current gain parameter, obtaining the adjusted compensation gamma register value of each sub-pixel, and sending it to the driver chip, so as to adjust the current gamma register value of each sub-pixel of the display panel to be compensated to the compensation gamma register value.

[0006] The method for obtaining the preset voltage parameter table includes: obtaining the initial reference voltage value and reference brightness of the sample display panel; obtaining the current usage time of the sample display panel in real time through a counter; when the current usage time of the sample display panel reaches the target lifetime decay time, adjusting the initial reference voltage value to make the current brightness of the sample display panel reach the target reference brightness, obtaining the compensation reference voltage value corresponding to the target lifetime decay time, and recording it in the preset voltage parameter table; wherein, the target reference brightness is determined based on the reference brightness; preferably, the target lifetime decay time includes multiple decay time nodes; when the current usage time of the sample display panel reaches a certain decay time node, adjusting the initial reference voltage value to make the brightness of the sample display panel at that decay time node reach the target reference brightness, obtaining the compensation reference voltage value corresponding to that decay time node; recording all the compensation reference voltage values ​​corresponding to the decay time nodes to generate the preset voltage parameter table.

[0007] The method for obtaining the preset gain parameter table includes: obtaining the initial brightness value of each sub-pixel of the sample display panel in each gamma band; obtaining the current usage time of the sample display panel in real time through a counter; when the current usage time of the sample display panel reaches the target lifetime decay time, obtaining the current brightness value of each sub-pixel of the sample display panel in each gamma band after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time; calculating the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value of each sub-pixel; and setting the current gain parameter of each sub-pixel at the target lifetime decay time. The current gain parameters corresponding to the time interval are recorded in the preset gain parameter table; preferably, the target lifetime decay time includes multiple decay time nodes; when the current usage time of the sample display panel reaches a certain decay time node, the current brightness value of each sub-pixel of the sample display panel in each gamma band is obtained at that decay time node after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the decay time node, and the current gain parameter of each sub-pixel corresponding to the decay time node is calculated based on the initial brightness value and the current brightness value corresponding to each sub-pixel; all the current gain parameters corresponding to the decay time nodes are recorded to generate the preset gain parameter table.

[0008] The step of calculating the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value corresponding to each sub-pixel includes: performing a mathematical matrix transformation operation on the initial brightness value and the current brightness value corresponding to each sub-pixel to obtain the current gain parameter of each sub-pixel corresponding to the target lifetime decay time; preferably, the formula for the mathematical matrix transformation operation is as follows:

[0009]

[0010] Wherein, R, G, B are the initial gamma register values ​​of each sub-pixel, R', G', B' are the target lifetime decay time, and the current gamma register values ​​of each sub-pixel after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time, and a1, a2, a3, a4, a5, a6, a7, a8, a9 are the current gain parameters of each sub-pixel corresponding to the target lifetime decay time.

[0011] To solve the above-mentioned technical problems, another technical solution adopted in this application is: providing an aging compensation system for a display panel, the aging compensation system for the display panel including a display panel to be compensated and an application processor connected to each other; the display panel to be compensated includes a display module and a driver chip connected to each other; the application processor includes a control unit, a storage unit, a parameter extraction unit, and a counter connected to each other; the control unit is connected to the driver chip of the display panel to be compensated; the storage unit is used to store the preset voltage parameter table and the preset gain parameter table; the counter is used to obtain the current usage time of the display panel to be compensated in real time; the parameter extraction unit is used to extract parameters from the storage unit when the current usage time of the display panel to be compensated reaches the target lifespan decay time. The unit obtains the preset voltage parameter table and determines the compensation reference voltage value of the display panel to be compensated; and according to the target lifetime decay time, obtains the preset gain parameter table from the storage unit and determines the current gain parameter of the display panel to be compensated, and obtains the adjusted compensation gamma register value of each sub-pixel of the display panel to be compensated according to the current gain parameter; the control unit is used to send the compensation reference voltage value of the display panel to be compensated and the adjusted compensation gamma register value of each sub-pixel to the driver chip of the display panel to be compensated, so as to adjust the initial reference voltage value of the display panel to be compensated to the compensation reference voltage value and adjust the current gamma register value of each sub-pixel of the display panel to be compensated to the compensation gamma register value.

[0012] The aging compensation system for the display panel further includes a sample display panel interconnected with the application processor; a control unit connected to the sample display panel; a counter used to acquire the current usage time of the sample display panel in real time; the control unit used to acquire the initial reference voltage value and reference brightness of the sample display panel; and when the current usage time of the sample display panel reaches the target lifetime decay time, adjusting the initial reference voltage value to make the current brightness of the sample display panel reach the target reference brightness, obtaining the compensation reference voltage value corresponding to the target lifetime decay time, and recording it in the preset voltage parameter table; wherein, the target reference brightness is determined based on the reference brightness; preferably, the target lifetime decay time includes multiple decay time nodes; when the current usage time of the sample display panel reaches a certain decay time node, the control unit is used to adjust the initial reference voltage value to make the brightness of the sample display panel at that decay time node reach the target reference brightness, obtaining the compensation reference voltage value corresponding to that decay time node; recording the compensation reference voltage values ​​corresponding to all the decay time nodes to generate the preset voltage parameter table.

[0013] The control unit is further configured to: acquire the initial brightness value of each sub-pixel of the sample display panel in each gamma band; when the current usage time of the sample display panel reaches the target lifetime decay time, acquire the current brightness value of each sub-pixel of the sample display panel in each gamma band after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time; calculate the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value of each sub-pixel; and record the current gain parameter of each sub-pixel corresponding to the target lifetime decay time in the preset gain parameter. In the table; preferably, the target lifetime decay time includes multiple decay time nodes; when the current usage time of the sample display panel reaches a certain decay time node, the control unit is used to obtain the current brightness value of each sub-pixel of the sample display panel in each gamma band at that decay time node after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the decay time node, and calculate the current gain parameter of each sub-pixel corresponding to the decay time node based on the initial brightness value and the current brightness value corresponding to each sub-pixel; record all the current gain parameters corresponding to the decay time nodes to generate the preset gain parameter table.

[0014] The step of the control unit performing the calculation of the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value corresponding to each sub-pixel includes: performing a mathematical matrix transformation operation on the initial brightness value and the current brightness value corresponding to each sub-pixel to obtain the current gain parameter of each sub-pixel corresponding to the target lifetime decay time; preferably, the formula for the mathematical matrix transformation operation is as follows:

[0015]

[0016] Wherein, R, G, B are the initial gamma register values ​​of each sub-pixel, R', G', B' are the current gamma register values ​​of each sub-pixel after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time at the target lifetime decay time, and a1, a2, a3, a4, a5, a6, a7, a8, a9 are the current gain parameters of each sub-pixel corresponding to the target lifetime decay time.

[0017] To solve the above-mentioned technical problems, another technical solution adopted in this application is: to provide a display panel, the display panel including a memory and a processor coupled to each other, the processor being used to execute program instructions stored in the memory to implement any of the above-mentioned aging compensation methods for the display panel.

[0018] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a computer-readable storage medium storing program instructions thereon, wherein the program instructions, when executed by a processor, implement any of the above-mentioned aging compensation methods for display panels.

[0019] The beneficial effects of this application are as follows: Unlike the prior art, the aging compensation method for the display panel in this application obtains the current usage time of the display panel to be compensated in real time through the application processor. When the current usage time of the display panel to be compensated reaches the target lifespan decay time, the compensation reference voltage value of the display panel to be compensated is determined from the preset voltage parameter table and sent to the driver chip of the display panel to be compensated, thereby realizing the brightness compensation of the display panel to be compensated; and according to the target lifespan decay time, the current gain parameter of the display panel to be compensated is determined from the preset gain parameter table. Then, according to the current gain parameter, the current gamma register value of each sub-pixel of the display panel to be compensated is adjusted to obtain the adjusted compensation gamma register value of each sub-pixel, and sent to the driver chip. Thus, the driver chip can perform digital-to-analog conversion on the compensation gamma register value to generate compensation data voltage for color mark compensation of each sub-pixel of the display panel to be compensated. Thus, the brightness and color mark decay compensation of the display panel to be compensated is realized on the platform through the application processor. In particular, De-burn compensation can also be performed on display panels without driver chips that do not have De-burn in function. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of 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. Wherein:

[0021] Figure 1 This is a flowchart illustrating an embodiment of the aging compensation method for the display panel of this application;

[0022] Figure 2 This is a flowchart illustrating the method for obtaining a preset voltage parameter table in one embodiment of the aging compensation method for the display panel of this application.

[0023] Figure 3 This is a flowchart illustrating the method for obtaining a preset gain parameter table in one embodiment of the aging compensation method for the display panel of this application.

[0024] Figure 4 This is a schematic diagram of the frame structure of an embodiment of the aging compensation system for the display panel of this application;

[0025] Figure 5This is a schematic diagram of the frame structure of an embodiment of the display panel of this application;

[0026] Figure 6 This is a schematic diagram of the framework structure of an embodiment of the computer-readable storage medium of this application. Detailed Implementation

[0027] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] Please see Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of the aging compensation method for a display panel according to this application. The aging compensation method for the display panel in this embodiment includes the following steps:

[0030] Step S11: The application processor obtains the current usage time of the display panel to be compensated in real time.

[0031] The application processor in this application is an external application processor to the display panel to be compensated. During the use of the display panel, the aging compensation operation is performed through the external application processor. The current usage time of the display panel to be compensated is determined based on its cumulative display time, which describes the cumulative duration of operation of the display panel. Since the brightness decay of OLED devices becomes more severe as the cumulative operating time of the display panel increases, by obtaining the current usage time of the display panel to be compensated in real time, targeted compensation can be performed on display panels at different usage times to ensure the compensation effect.

[0032] Step S12: When the current usage time of the display panel to be compensated reaches the target lifespan decay time, determine the compensation reference voltage value of the display panel to be compensated from the preset voltage parameter table, and send it to the driver chip of the display panel to be compensated, so as to adjust the initial reference voltage value of the display panel to be compensated to the compensation reference voltage value.

[0033] Understandably, a display panel can adjust its input voltage and output brightness via a gamma module to conform to a gamma curve. For example, a gamma curve with a gamma value of 2.2 best matches the visual changes of the human eye, resulting in optimal display performance. In other words, the display panel has a pre-set initial reference voltage value and a corresponding reference brightness. Therefore, when the current usage time of the display panel reaches its target lifespan decay time, the display brightness cannot reach the target reference brightness due to decay, even with the output voltage at the initial reference voltage value. Thus, the initial reference voltage value needs adjustment. Specifically, based on the target lifespan decay time and the initial reference voltage value, the compensation reference voltage value is determined from a preset voltage parameter table and sent to the display panel's driver chip. This adjusts the initial reference voltage value to the compensation reference voltage value, thereby compensating for the brightness of the display panel.

[0034] Step S13: Determine the current gain parameter of the display panel to be compensated from the preset gain parameter table according to the target lifetime decay time.

[0035] Step S14: Adjust the current gamma register value of each sub-pixel of the display panel to be compensated according to the current gain parameter to obtain the adjusted compensation gamma register value of each sub-pixel, and send it to the driver chip to adjust the current gamma register value of each sub-pixel of the display panel to be compensated to the compensation gamma register value.

[0036] It is understandable that a display panel can include sub-pixels of three colors: red, green, and blue. Full-color illumination is achieved by mixing the brightness of these three colors. The corresponding display device can include three gamma registers corresponding to the red, green, and blue sub-pixels respectively. The register value stored in the gamma register of each sub-pixel can represent the brightness and color scale of the corresponding sub-pixel. Before aging, the luminous efficiency of different gray levels in an OLED device does not differ significantly. However, after aging, the luminous efficiency decays at different gray levels differently. For example, the luminous efficiency decay at low and medium gray levels is less than that at high gray levels. This means that during use, the luminous efficiency of different gray levels in the display panel to be compensated will decay at different rates, leading to changes in the color scale of the display panel. Therefore, it is necessary to adjust the current gamma register value of each sub-pixel of the display panel to be compensated. Specifically, based on the target lifetime decay time of the current usage time of the display panel to be compensated, the current gain parameter of each sub-pixel of the display panel to be compensated is found and determined from the preset gain parameter table. Then, the current gamma register value of each sub-pixel of the display panel to be compensated is adjusted according to the current gain parameter to obtain the compensation gamma register value of each sub-pixel. The compensation gamma register value is then sent to the driver chip of the display panel to be compensated so that the current gamma register value of each sub-pixel of the display panel to be compensated is adjusted to the compensation gamma register value. By adjusting the register value in the gamma register, the brightness of the corresponding sub-pixel can be changed, thereby changing the brightness and color scale of the display panel, thus realizing the compensation of the color scale of the display panel to be compensated.

[0037] In addition, the aging compensation method for the display panel in this application can be implemented by the system platform. During the use of the display panel, the current usage time of the display panel is obtained in real time by the system platform. When the current usage time of the display panel reaches the target life decay time, the compensation reference voltage value and the compensation gamma register value are sent to the driver chip of the display panel, thereby realizing the de-burn-in compensation of the display panel. In particular, the de-burn-in compensation can also be performed on the display panel for the driver chip without the de-burn-in function.

[0038] In the above scheme, the system platform obtains the current usage time of the display panel to be compensated in real time. When the current usage time of the display panel to be compensated reaches the target lifespan decay time, it determines the compensation reference voltage value of the display panel to be compensated from the preset voltage parameter table and sends it to the driver chip of the display panel to be compensated, thereby compensating for the brightness of the display panel to be compensated. Furthermore, based on the target lifespan decay time, it determines the current gain parameter of the display panel to be compensated from the preset gain parameter table, and then adjusts the current gamma register value of each sub-pixel of the display panel to be compensated according to the current gain parameter, obtaining the adjusted compensation gamma register value of each sub-pixel, and sends it to the driver chip. Thus, the driver chip can perform digital-to-analog conversion on the compensation gamma register value to generate compensation data voltage, so as to perform color mark compensation on each sub-pixel of the display panel to be compensated, thereby realizing the compensation for brightness and color mark decay of the display panel to be compensated on the platform.

[0039] Please see Figure 2 , Figure 2 This is a flowchart illustrating the method for obtaining a preset voltage parameter table in one embodiment of the aging compensation method for a display panel according to this application. It is understood that the aging compensation method for the display panel of this application requires storing a preset voltage parameter table. In one embodiment, the method for obtaining the preset voltage parameter table may include the following steps:

[0040] Step S21: Obtain the initial reference voltage value and reference brightness of the sample display panel.

[0041] Specifically, the initial reference voltage value of the sample display panel can include the highest reference voltage VGMP and the lowest reference voltage VGSP. It can be understood that the display panel can be divided into 0-255 gray levels. The highest reference voltage VGMP is the voltage corresponding to 255 gray levels, and the lowest reference voltage VGSP is the voltage corresponding to 0 gray level. Therefore, the highest reference voltage VGMP and the lowest reference voltage VGSP can limit the input voltage range of the display panel. The input voltage range formed by the highest reference voltage VGMP and the lowest reference voltage VGSP can be divided into 256 gray level reference voltages, and the reference voltage of each gray level corresponds to the reference brightness of the corresponding gray level.

[0042] Step S22: Obtain the current usage time of the sample display panel in real time using a counter.

[0043] Step S23: When the current usage time of the sample display panel reaches the target lifetime decay time, adjust the initial reference voltage value so that the current brightness of the sample display panel reaches the target reference brightness, obtain the compensation reference voltage value corresponding to the target lifetime decay time, and record it in the preset voltage parameter table; wherein, the target reference brightness is determined according to the reference brightness.

[0044] When the current usage time of the sample display panel reaches the target lifespan decay time, the display brightness of the sample display panel cannot reach the reference brightness due to decay when the output voltage is at the initial reference voltage value. Therefore, the initial reference voltage value of the sample display panel can be adjusted to make the current brightness of the sample display panel reach the target reference brightness. The target reference brightness can be determined based on the reference brightness, for example, it can be the reference brightness or a preset multiple of the reference brightness. At this time, the adjusted voltage value can be recorded as the compensation reference voltage value corresponding to the target lifespan decay time, and the target lifespan decay time and the corresponding compensation reference voltage value can be recorded in the preset voltage parameter table. Thus, in the actual aging compensation process, the corresponding compensation reference voltage value can be found and determined from the preset voltage parameter table according to the target lifespan decay time at which the current usage time of the display panel is, thereby realizing the brightness compensation of the display panel.

[0045] In one embodiment, the target lifetime decay time includes multiple decay time nodes; step S23 above may specifically include: when the current usage time of the sample display panel reaches a certain decay time node, adjusting the initial reference voltage value so that the brightness of the sample display panel at the decay time node reaches the target reference brightness, and obtaining the compensation reference voltage value corresponding to the decay time node; recording all the compensation reference voltage values ​​corresponding to the decay time nodes, and generating the preset voltage parameter table.

[0046] Understandably, multiple time points can be set as compensation points within the lifespan of the sample display panel, meaning the target lifespan decay time can correspond to multiple decay time points. Specifically, these multiple decay time points can be sequentially set to T95, T90, T85, T80, T75, T70, T65, T60, etc., based on the increasing usage time of the sample display panel. Here, T95 represents the time when the sample display panel's lifespan decays to 5%. Thus, after the sample display panel has been used for T95 time (e.g., 500 hours), the brightness is compensated to the target reference brightness, and the compensated reference voltage value is used as the compensation reference voltage value corresponding to T95. After the sample display panel has been used for T90 time (e.g., 1000 hours), the brightness is compensated to the target reference brightness, and the compensated reference voltage value is used as the compensation reference voltage value corresponding to T90. This process continues, obtaining the compensation reference voltage values ​​corresponding to all decay time points, ultimately forming a preset voltage parameter table. Of course, in one embodiment, the compensated target reference brightness can be set to the reference brightness corresponding to the initial reference voltage value. In other embodiments, the specific setting of the compensated target reference brightness value can also be reasonably set according to actual needs. As one possible implementation method, the compensated brightness value can also be gradually reduced as the display panel is used for longer. For example, after the sample display panel is used for T95 time, the brightness is compensated to the reference brightness, that is, the target reference brightness is the reference brightness corresponding to the initial reference voltage value. After the sample display panel is used for T90 time, the brightness is compensated to 95% of the reference brightness, that is, the target reference brightness is 95% of the reference brightness. After the sample display panel is used for T85 time, the brightness is compensated to 90% of the reference brightness, that is, the target reference brightness is 90% of the reference brightness, and so on.

[0047] Please see Figure 3 , Figure 3 This is a flowchart illustrating the method for obtaining a preset gain parameter table in one embodiment of the display panel aging compensation method of this application. It is understood that the display panel aging compensation method of this application needs to store a preset gain parameter table. In one embodiment, the method for obtaining the preset gain parameter table of this application may include the following steps:

[0048] Step S31: Obtain the initial brightness value of each sub-pixel of the sample display panel in each gamma band.

[0049] Step S32: Obtain the current usage time of the sample display panel in real time using a counter.

[0050] Step S33: When the current usage time of the sample display panel reaches the target lifetime decay time, obtain the current brightness value of each sub-pixel of the sample display panel in each gamma band after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time.

[0051] Step S34: Calculate the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value corresponding to each sub-pixel.

[0052] Step S35: Record the current gain parameter of each sub-pixel corresponding to the target lifetime decay time in the preset gain parameter table.

[0053] It is understandable that a sample display panel can include multiple gamma bands, each with a specific gamma value and brightness. A pixel with a specific grayscale value can use a gamma band with a specific brightness. By selecting from multiple gamma bands, it is possible to determine which brightness to use to display the pixel, giving it a specific grayscale value. In other words, the grayscale of a pixel is related to both the gamma band and the pixel's brightness. A pixel is composed of sub-pixels, and for each sub-pixel, its grayscale is related to both the gamma band and its brightness. As the display panel degrades over its lifespan, sub-pixels may not achieve the required brightness using a specific gamma band, resulting in substandard grayscale and color mark deviations in the display panel's pixel color scale. Therefore, brightness compensation for each sub-pixel is necessary.

[0054] Specifically, before using the sample display panel, the initial brightness values ​​of each sub-pixel in each gamma band can be acquired and stored. During use, a counter continuously monitors the current usage time of the sample display panel. When the current usage time reaches the target lifetime decay time, the initial reference voltage value has already been adjusted to the compensation reference voltage value corresponding to the target lifetime decay time. However, although the current brightness of the sample display panel reaches the target reference brightness, due to decay, the brightness of each sub-pixel in each gamma band cannot reach the initial brightness value. Therefore, after the current brightness of the sample display panel reaches the target reference brightness, the current brightness values ​​of each sub-pixel in each gamma band under the target reference brightness condition can be acquired. Then, the brightness of each sub-pixel in each gamma band can be adjusted to bring the current brightness value of each sub-pixel in each gamma band back to the initial brightness value, thus achieving color mark compensation for the sample display panel under the target reference brightness condition. Regarding the brightness adjustment of each sub-pixel of the sample display panel in each gamma band, the gain parameter corresponding to each sub-pixel can be calculated first based on the initial brightness value and the current brightness value of each sub-pixel. Then, the current brightness value of each sub-pixel can be compensated according to the gain parameter. At this time, the gain parameter can be recorded as the current gain parameter of each sub-pixel at the target lifetime decay time and recorded in the preset gain parameter table. Therefore, in the actual aging compensation process, the current gain parameter corresponding to each sub-pixel can be found and determined from the preset gain parameter table according to the target lifetime decay time of the current usage time of the display panel, thereby realizing the brightness compensation of each sub-pixel of the display panel and ultimately restoring the color mark of the display panel to its initial state.

[0055] In one embodiment, the target lifetime decay time includes multiple decay time nodes; when the current usage time of the sample display panel reaches a certain decay time node, the current brightness value of each sub-pixel of the sample display panel in each gamma band at that decay time node is obtained, and the current gain parameter of each sub-pixel at that decay time node is calculated based on the initial brightness value and the current brightness value corresponding to each sub-pixel; all the current gain parameters corresponding to the decay time nodes are recorded to generate the preset gain parameter table.

[0056] Understandably, multiple time points can be set as compensation points within the lifespan of the sample display panel, meaning the target lifespan decay time can correspond to multiple decay time points. Specifically, these multiple decay time points can be sequentially set to T95, T90, T85, T80, T75, T70, T65, T60, etc., based on the increasing usage time of the sample display panel. T95 represents the time when the sample display panel's lifespan decays to 5%. Therefore, after the sample display panel has been used for T95 hours (e.g., 500 hours), the current brightness value of each sub-pixel in each gamma band is obtained after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to T95. At this point, the initial brightness value and current brightness value of each sub-pixel can be compared... The current gain parameter of each sub-pixel at time node T95 is calculated. After the sample display panel has been used for time T90 (e.g., 1000 hours), the current brightness value of each sub-pixel in each gamma band is obtained after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to T90. At this time, the current gain parameter of each sub-pixel at time node T90 can be calculated based on the initial brightness value and the current brightness value of each sub-pixel. By analogy, the current gain parameters corresponding to all attenuation time nodes can be obtained, and finally a preset gain parameter table is formed.

[0057] In one embodiment, step S34 may specifically include: performing a mathematical matrix transformation operation on the initial brightness value and the current brightness value corresponding to each sub-pixel to obtain the current gain parameter of each sub-pixel corresponding to the target lifetime decay time.

[0058] Understandably, the current gamma register value of each sub-pixel reflects the brightness of that sub-pixel. When calculating the current gain parameter for each sub-pixel, we can first read back the pre-stored initial gamma register values ​​of each sub-pixel, denoted as R, G, B. Then, we read the current gamma register values ​​of each sub-pixel after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time, denoted as R', G', B'. Finally, based on the initial gamma register values ​​(R, G, B) and the current gamma register values ​​(R', G', B'), we obtain the gain matrix through matrix division, which serves as the current gain parameter for each sub-pixel at the target lifetime decay time. The formula is as follows:

[0059]

[0060] The matrix parameters "a1, a2, a3, a4, a5, a6, a7, a8, a9" of the gain matrix can be obtained. Therefore, during the actual aging compensation process, the corresponding current gain parameter can be found and determined from the preset gain parameter table based on the target lifetime decay time of the display panel's current usage time. The matrix parameters of the gain matrix at the target lifetime decay time are multiplied by the current gamma register value of each sub-pixel of the aged display panel after the target lifetime decay time, resulting in the adjusted compensation gamma register value for each sub-pixel. This compensation gamma register value is then written to the driver chip, which performs digital-to-analog conversion on the compensation gamma register value to generate compensation data voltage, thus obtaining the display panel with the specified color mark and achieving color mark compensation for the display panel.

[0061] This application also provides an aging compensation system for a display panel. Please refer to [link / reference]. Figure 4 , Figure 4This is a schematic diagram of the framework structure of an embodiment of the aging compensation system for the display panel of this application. The aging compensation system 40 of the display panel in this embodiment includes a display panel 400 to be compensated and an application processor 401 connected to each other; specifically, the application processor 401 is a processor on the system platform, and the application processor 401 can transmit signals to the display panel 400 to be compensated through the signal transmission port on the system platform. The display panel 400 to be compensated includes interconnected display modules (not shown) and driver chips (not shown); the application processor 401 includes interconnected control unit 4010, storage unit 4011, parameter extraction unit 4012, and counter 4013; the control unit 4010 is connected to the driver chip of the display panel 400 to be compensated; the storage unit 4011 is used to store a preset voltage parameter table and a preset gain parameter table; the counter 4013 serves as a timing module, used to obtain the current usage time of the display panel 400 to be compensated in real time; the parameter extraction unit 4012 is used to obtain the preset voltage parameter table from the storage unit 4011 and determine the compensation reference of the display panel 400 to be compensated when the current usage time of the display panel 400 to be compensated reaches the target life decay time. The control unit 4010 is used to send the compensation reference voltage value of the display panel 400 to the driver chip of the display panel 400 to be compensated; and to obtain the preset gain parameter table from the storage unit 4011 according to the target lifetime decay time and determine the current gain parameter of the display panel 400 to be compensated, and to obtain the adjusted compensation gamma register value of each sub-pixel of the display panel 400 to be compensated according to the current gain parameter; the control unit 4010 is used to send the compensation reference voltage value of the display panel 400 to be compensated and the adjusted compensation gamma register value of each sub-pixel of the display panel 400 to the driver chip of the display panel 400 to be compensated, so as to adjust the initial reference voltage value of the display panel 400 to the compensation reference voltage value and adjust the current gamma register value of each sub-pixel of the display panel 400 to the compensation gamma register value.

[0062] The above scheme uses a counter 4013 to obtain the current usage time of the display panel 400 to be compensated in real time. When the current usage time of the display panel 400 to be compensated reaches the target lifespan decay time, the parameter extraction unit 4012 determines the compensation reference voltage value of the display panel 400 to be compensated from the preset voltage parameter table in the storage unit 4011, and sends it to the driver chip of the display panel 400 to be compensated by the control unit 4010, thereby realizing the brightness compensation of the display panel 400 to be compensated; and according to the target lifespan decay time, the parameter extraction unit 4012 obtains the value from the storage unit 4011. The current gain parameter of the display panel 400 to be compensated is determined in the preset gain parameter table in section 1. Then, the current gamma register value of each sub-pixel of the display panel 400 to be compensated is adjusted according to the current gain parameter to obtain the adjusted compensation gamma register value of each sub-pixel. The control unit 4010 sends the adjusted compensation gamma register value to the driver chip. The driver chip can then perform digital-to-analog conversion on the compensation gamma register value to generate compensation data voltage, so as to perform color mark compensation on each sub-pixel of the display panel 400 to be compensated, thereby realizing the compensation of brightness and color mark attenuation of the display panel 400 to be compensated on the platform.

[0063] In one embodiment, the aging compensation system 40 of the display panel further includes a sample display panel (not shown) interconnected with the application processor 401; the control unit 4010 is connected to the sample display panel; the counter 4013 is used to acquire the current usage time of the sample display panel in real time; the control unit 4010 is used to acquire the initial reference voltage value and reference brightness of the sample display panel; and when the current usage time of the sample display panel reaches the target lifespan decay time, adjust the initial reference voltage value so that the current brightness of the sample display panel reaches the target reference brightness, obtain the compensation reference voltage value corresponding to the target lifespan decay time, and record it in the preset voltage parameter table; wherein, the target reference brightness is determined according to the reference brightness.

[0064] Furthermore, the target lifetime decay time includes multiple decay time nodes; when the current usage time of the sample display panel reaches a certain decay time node, the control unit 4010 adjusts the initial reference voltage value so that the brightness of the sample display panel at that decay time node reaches the target reference brightness, and obtains the compensation reference voltage value corresponding to that decay time node; records all the compensation reference voltage values ​​corresponding to the decay time nodes, and generates the preset voltage parameter table.

[0065] In one embodiment, the control unit 4010 is further configured to acquire the initial brightness value of each sub-pixel of the sample display panel in each gamma band; when the current usage time of the sample display panel reaches the target lifetime decay time, acquire the current brightness value of each sub-pixel of the sample display panel in each gamma band after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time; calculate the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value of each sub-pixel; and record the current gain parameter of each sub-pixel corresponding to the target lifetime decay time in the preset gain parameter table.

[0066] Furthermore, the target lifetime decay time includes multiple decay time nodes; when the current usage time of the sample display panel reaches a certain decay time node, the control unit 4010 is used to obtain the current brightness value of each sub-pixel of the sample display panel in each gamma band at that decay time node after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to that decay time node, and calculate the current gain parameter of each sub-pixel corresponding to that decay time node based on the initial brightness value and the current brightness value corresponding to each sub-pixel; record all the current gain parameters corresponding to the decay time nodes to generate the preset gain parameter table.

[0067] Further, the control unit 4010 performs the step of calculating the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value corresponding to each sub-pixel, including: performing a mathematical matrix transformation operation on the initial brightness value and the current brightness value corresponding to each sub-pixel to obtain the current gain parameter of each sub-pixel corresponding to the target lifetime decay time.

[0068] Furthermore, the formulas for mathematical matrix transformation operations are as follows:

[0069]

[0070] Wherein, R, G, B are the initial gamma register values ​​of each sub-pixel, R', G', B' are the current gamma register values ​​of each sub-pixel after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time at the target lifetime decay time, and a1, a2, a3, a4, a5, a6, a7, a8, a9 are the current gain parameters of each sub-pixel corresponding to the target lifetime decay time.

[0071] For details regarding the aging compensation system 40 of this application for implementing the aging compensation method for the display panel, please refer to the above-mentioned embodiment of the aging compensation method for the display panel, which will not be repeated here.

[0072] This application also provides a display panel; please refer to [link / reference]. Figure 5 , Figure 5 This is a schematic diagram of the structure of a display panel according to an embodiment of this application. The display panel 50 in this embodiment includes a processor 501 and a memory 502 coupled to each other. The memory 502 stores program instructions, and the processor 501 calls the program instructions stored in the memory to execute any of the above-described aging compensation methods for the display panel.

[0073] Specifically, processor 501 controls itself and memory 502 to implement the steps of any of the above-described aging compensation method embodiments for display panels. Processor 501 may also be referred to as a CPU (Central Processing Unit). Processor 501 may be an integrated circuit chip with signal processing capabilities. Processor 501 may also be a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor may be a microprocessor or any conventional processor. Furthermore, processor 501 may be implemented using integrated circuit chips.

[0074] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of an embodiment of the computer-readable storage medium of this application. The computer-readable storage medium 60 of this application stores program instructions 600 thereon, which, when executed by a processor, implement the steps in any of the above-described embodiments of the aging compensation method for display panels.

[0075] The computer-readable storage medium 60 can be a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, or it can be a server that stores the program instructions 600. The server can send the stored program instructions 600 to other devices for execution, or it can execute the stored program instructions 600 itself.

[0076] In the embodiments provided in this application, it should be understood that the disclosed methods, systems, devices, and apparatuses can be implemented in other ways. For example, the system and apparatus implementations described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0077] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0078] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0079] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

Claims

1. An aging compensation method for a display panel, characterized in that, The aging compensation method for the display panel includes: The application processor obtains the current usage time of the display panel to be compensated in real time; When the current usage time of the display panel to be compensated reaches the target life decay time, the compensation reference voltage value of the display panel to be compensated is determined from the preset voltage parameter table and sent to the driver chip of the display panel to be compensated, so as to adjust the initial reference voltage value of the display panel to be compensated to the compensation reference voltage value. Based on the target lifetime decay time, the current gain parameter of the display panel to be compensated is determined from the preset gain parameter table; The current gamma register value of each sub-pixel of the display panel to be compensated is adjusted according to the current gain parameter to obtain the adjusted compensation gamma register value of each sub-pixel, and then sent to the driver chip to adjust the current gamma register value of each sub-pixel of the display panel to be compensated to the compensation gamma register value. The method for obtaining the preset gain parameter table includes: Obtain the initial brightness value of each sub-pixel of the sample display panel in each gamma band; The current usage time of the sample display panel is obtained in real time through a counter; When the current usage time of the sample display panel reaches the target lifetime decay time, the current brightness value of each sub-pixel of the sample display panel in each gamma band is obtained after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time. Based on the initial brightness value and the current brightness value corresponding to each sub-pixel, the current gain parameter of each sub-pixel corresponding to the target lifetime decay time is calculated; Record the current gain parameter of each sub-pixel corresponding to the target lifetime decay time in the preset gain parameter table; The target lifetime decay time includes multiple decay time nodes; When the current usage time of the sample display panel reaches a certain decay time node, the current brightness value of each sub-pixel of the sample display panel in each gamma band is obtained at that decay time node after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the decay time node. Based on the initial brightness value and the current brightness value corresponding to each sub-pixel, the current gain parameter corresponding to each sub-pixel at that decay time node is calculated. Record the current gain parameters corresponding to all the decay time nodes to generate the preset gain parameter table.

2. The aging compensation method for a display panel according to claim 1, characterized in that, The method for obtaining the preset voltage parameter table includes: Obtain the initial reference voltage and reference brightness of the sample display panel; The current usage time of the sample display panel is obtained in real time through a counter; When the current usage time of the sample display panel reaches the target lifespan decay time, the initial reference voltage value is adjusted so that the current brightness of the sample display panel reaches the target reference brightness, and the compensation reference voltage value corresponding to the target lifespan decay time is obtained and recorded in the preset voltage parameter table; wherein, the target reference brightness is determined according to the reference brightness.

3. The aging compensation method for a display panel according to claim 2, characterized in that, The target lifetime decay time includes multiple decay time nodes; When the current usage time of the sample display panel reaches a certain decay time node, the initial reference voltage value is adjusted so that the brightness of the sample display panel at the decay time node reaches the target reference brightness, and the compensation reference voltage value corresponding to the decay time node is obtained. Record the compensation reference voltage values ​​corresponding to all the attenuation time nodes to generate the preset voltage parameter table.

4. The aging compensation method for a display panel according to claim 3, characterized in that, The step of calculating the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value of each sub-pixel includes: A mathematical matrix transformation operation is performed on the initial brightness value and the current brightness value corresponding to each sub-pixel to obtain the current gain parameter of each sub-pixel corresponding to the target lifetime decay time.

5. The aging compensation method for a display panel according to claim 4, characterized in that, The formulas for mathematical matrix transformation operations are as follows: Wherein, R, G, B are the initial gamma register values ​​of each sub-pixel, R', G', B' are the current gamma register values ​​of each sub-pixel after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time at the target lifetime decay time, and a1, a2, a3, a4, a5, a6, a7, a8, a9 are the current gain parameters of each sub-pixel corresponding to the target lifetime decay time.

6. An aging compensation system for a display panel, characterized in that, The aging compensation system of the display panel includes a display panel to be compensated and an application processor connected to each other; the display panel to be compensated includes a display module and a driver chip connected to each other; the application processor includes a control unit, a storage unit, a parameter extraction unit and a counter connected to each other; the control unit is connected to the driver chip of the display panel to be compensated. The storage unit is used to store a preset voltage parameter table and a preset gain parameter table; The counter is used to obtain the current usage time of the display panel to be compensated in real time; The parameter extraction unit is used to retrieve the preset voltage parameter table from the storage unit and determine the compensation reference voltage value of the display panel to be compensated when the current usage time of the display panel to be compensated reaches the target life decay time. And based on the target lifetime decay time, the preset gain parameter table is obtained from the storage unit and the current gain parameter of the display panel to be compensated is determined, and the adjusted compensation gamma register value of each sub-pixel of the display panel to be compensated is obtained based on the current gain parameter. The control unit is used to send the compensation reference voltage value of the display panel to be compensated and the adjusted compensation gamma register value of each sub-pixel to the driver chip of the display panel to be compensated, so as to adjust the initial reference voltage value of the display panel to be compensated to the compensation reference voltage value and adjust the current gamma register value of each sub-pixel of the display panel to be compensated to the compensation gamma register value. The control unit is further configured to acquire the initial brightness value of each sub-pixel of the sample display panel in each gamma band; when the current usage time of the sample display panel reaches the target lifetime decay time, acquire the current brightness value of each sub-pixel of the sample display panel in each gamma band after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time; calculate the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value of each sub-pixel; and record the current gain parameter of each sub-pixel corresponding to the target lifetime decay time in the preset gain parameter table. The target lifetime decay time includes multiple decay time nodes; When the current usage time of the sample display panel reaches a certain decay time node, the control unit is used to obtain the current brightness value of each sub-pixel of the sample display panel in each gamma band after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the decay time node at that decay time node, and calculate the current gain parameter of each sub-pixel corresponding to the decay time node based on the initial brightness value and the current brightness value corresponding to each sub-pixel. Record the current gain parameters corresponding to all the decay time nodes to generate the preset gain parameter table.

7. The aging compensation system for a display panel according to claim 6, characterized in that, The aging compensation system of the display panel also includes a sample display panel interconnected with the application processor; the control unit is connected to the sample display panel; The counter is used to obtain the current usage time of the sample display panel in real time; The control unit is used to acquire the initial reference voltage value and reference brightness of the sample display panel; and when the current usage time of the sample display panel reaches the target lifespan decay time, adjust the initial reference voltage value so that the current brightness of the sample display panel reaches the target reference brightness, obtain the compensation reference voltage value corresponding to the target lifespan decay time, and record it in the preset voltage parameter table; wherein, the target reference brightness is determined based on the reference brightness.

8. The aging compensation system for a display panel according to claim 7, characterized in that, The target lifetime decay time includes multiple decay time nodes; When the current usage time of the sample display panel reaches a certain decay time node, the control unit is used to adjust the initial reference voltage value so that the brightness of the sample display panel at the decay time node reaches the target reference brightness, and obtain the compensation reference voltage value corresponding to the decay time node. Record the compensation reference voltage values ​​corresponding to all the attenuation time nodes to generate the preset voltage parameter table.

9. The aging compensation system for a display panel according to claim 8, characterized in that, The control unit performs the step of calculating the current gain parameter of each sub-pixel corresponding to the target lifetime decay time based on the initial brightness value and the current brightness value corresponding to each sub-pixel, including: performing a mathematical matrix transformation operation on the initial brightness value and the current brightness value corresponding to each sub-pixel to obtain the current gain parameter of each sub-pixel corresponding to the target lifetime decay time.

10. The aging compensation system for a display panel according to claim 9, characterized in that, The formulas for mathematical matrix transformation operations are as follows: Wherein, R, G, B are the initial gamma register values ​​of each sub-pixel, R', G', B' are the current gamma register values ​​of each sub-pixel after adjusting the initial reference voltage value to the compensation reference voltage value corresponding to the target lifetime decay time at the target lifetime decay time, and a1, a2, a3, a4, a5, a6, a7, a8, a9 are the current gain parameters of each sub-pixel corresponding to the target lifetime decay time.

11. A display panel, characterized in that, The display panel includes a memory and a processor coupled to each other, the processor being used to execute program instructions stored in the memory to implement the aging compensation method of the display panel according to any one of claims 1 to 5.

12. A computer-readable storage medium having program instructions stored thereon, characterized in that, When the program instructions are executed by the processor, they implement the aging compensation method for the display panel according to any one of claims 1 to 5.

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