Method, device, storage medium and display device for improving color cast of display panel

Abstract

This paper discloses a method, apparatus, and display device for improving color shift in a display panel. The method includes: periodically acquiring the luminescence data of at least one blue sub-pixel of the display panel and statistically analyzing its historical luminescence data; determining the lifetime loss of the blue sub-pixel based on the statistical results; periodically correcting the luminescence brightness of at least one red sub-pixel: inputting the lifetime loss of the surrounding blue sub-pixels and the target luminescence brightness of the red sub-pixel into a red sub-pixel luminescence model to calculate the brightness deviation of the red sub-pixel; correcting the current luminescence brightness of the red sub-pixel based on the brightness deviation, such that the corrected luminescence brightness value is equal to the luminescence value of the red sub-pixel under the driving current corresponding to the target luminescence brightness, assuming the surrounding blue sub-pixels have not emitted light before. The solution presented in this paper can eliminate the influence of blue sub-pixel aging on the luminescence of surrounding red sub-pixels, thus improving the color shift of the screen.

Description

Technical Field

[0001] This article relates to display technology, and in particular to a method, apparatus, storage medium and display device for improving color deviation of a display panel. Background Technology

[0002] With the development of display technology, the types of displays are increasing day by day. OLED (Organic Light Emitting Diode) displays have significant advantages in terms of response speed, color performance, viewing angle, screen thickness and luminous efficiency, and are therefore widely used in various electronic products.

[0003] OLED displays use organic light-emitting materials, which gradually age over time. Furthermore, prolonged display of static images, high-brightness operation, and environmental factors such as temperature and humidity can accelerate the aging process of OLED displays.

[0004] OLED displays include three primary colors: red, blue, and green. However, the aging rates of the light-emitting materials for these three primary colors are not the same. After a period of time, the brightness of the blue, red, and green light-emitting devices decays to different degrees, resulting in color shift in the display panel. Summary of the Invention

[0005] This application provides a method for improving color shift in a display panel, including:

[0006] Periodically acquire the luminescence data of at least one blue sub-pixel within the display area of ​​the display panel, statistically analyze the historical luminescence data of each blue sub-pixel, and determine the lifetime loss of the blue sub-pixel based on the statistical results; wherein, any pixel includes three sub-pixels: a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the luminescence data of the sub-pixel includes the luminescence brightness and luminescence duration of the sub-pixel within a statistical period;

[0007] The luminance of at least one red sub-pixel is periodically corrected: the lifetime loss of the blue sub-pixels surrounding the red sub-pixel and the target luminance of the red sub-pixel are input into the red sub-pixel luminance model to calculate the luminance deviation of the red sub-pixel. The current luminance of the red sub-pixel is corrected according to the luminance deviation, so that the corrected luminance value is equal to the luminance value of the red sub-pixel under the driving current corresponding to the target luminance, provided that the red sub-pixel has not emitted light before the surrounding blue sub-pixels.

[0008] This application provides an apparatus for improving color shift in a display panel, comprising:

[0009] The data acquisition and statistics module is configured to periodically acquire the luminous emission data of at least one blue sub-pixel within the display area of ​​the display panel, statistically analyze the historical luminous emission data of each blue sub-pixel, and determine the lifetime loss of the blue sub-pixel based on the statistical results; wherein any pixel includes three sub-pixels: a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the luminous emission data of the sub-pixel includes the luminous brightness and luminous duration of the sub-pixel within a statistical period;

[0010] The brightness correction module is configured to periodically correct the luminance of at least one red sub-pixel: the lifetime loss of the blue sub-pixels surrounding the red sub-pixel and the target luminance of the red sub-pixel are input into the red sub-pixel luminance model to calculate the brightness deviation of the red sub-pixel, and the current luminance of the red sub-pixel is corrected according to the brightness deviation, so that the corrected luminance value is equal to the luminance value of the red sub-pixel under the driving current corresponding to the target luminance, provided that the red sub-pixel has not emitted light before the surrounding blue sub-pixels.

[0011] This application provides an apparatus for improving color shift of a display panel, comprising: a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, implements the steps of the method for improving color shift of a display panel described above.

[0012] This application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method for improving color shift of a display panel described above.

[0013] This application provides a display device, including the above-described device for improving color shift of a display panel.

[0014] Compared with related technologies, this application provides a method, apparatus, and display device for improving color shift in a display panel. The method involves periodically acquiring the luminescence data of at least one blue sub-pixel within the display area of ​​the display panel, statistically analyzing the historical luminescence data of each blue sub-pixel, and determining the lifetime loss of the blue sub-pixel based on the statistical results. Each pixel includes three sub-pixels: a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The luminescence data of the sub-pixel includes its luminescence brightness and duration within a statistical period. The luminescence brightness of at least one red sub-pixel is periodically corrected: the lifetime loss of the surrounding blue sub-pixels and the target luminescence brightness of the red sub-pixel are input into a red sub-pixel luminescence model to calculate the brightness deviation of the red sub-pixel. The current luminescence brightness of the red sub-pixel is then corrected based on this deviation, such that the corrected luminescence brightness value is equal to the luminescence value of the red sub-pixel under the driving current corresponding to the target luminescence brightness, assuming that the surrounding blue sub-pixels have not previously emitted light. This solution can eliminate the influence of blue sub-pixel aging on the luminescence of surrounding red sub-pixels, thus improving the color shift of the screen.

[0015] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0016] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0017] Figure 1 A schematic diagram of a color chessboard pattern provided in an embodiment of this application;

[0018] Figure 2 A flowchart illustrating a method for improving color shift in a display panel, provided in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram illustrating the partial area division of a display panel according to an embodiment of this application;

[0020] Figure 4 This application provides a schematic diagram of the luminance curve of a red sub-pixel under the driving current corresponding to the maximum luminance.

[0021] Figure 5 A schematic diagram of a device for improving color shift of a display panel provided in an embodiment of this application;

[0022] Figure 6This is a schematic diagram of another device for improving color shift of a display panel, provided in an embodiment of this application. Detailed Implementation

[0023] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0024] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0025] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0026] Before OLED display panels leave the factory, they usually need to undergo aging tests, and the checkerboard aging test is a common aging experiment. Figure 1This is a schematic diagram of a color checkerboard pattern. The color checkerboard pattern includes black, white, green, red, and blue. An OLED display panel displays the color checkerboard pattern statically for an extended period. After a period, a specialized test screen (usually a monochrome screen) is used to detect any brightness decay in each pixel. During the aging test, it was found that the brightness of the blue checkerboard area abnormally increased when displaying a red test screen. This application proposes a method to improve color shift in a display panel to address this problem.

[0027] like Figure 2 As shown, this disclosure provides a method for improving color shift in a display panel, including:

[0028] Step S10: Periodically acquire the light emission data of at least one blue sub-pixel in the display area of ​​the display panel, statistically analyze the historical light emission data of each blue sub-pixel, and determine the lifetime loss of the blue sub-pixel based on the statistical results; wherein, any pixel includes three sub-pixels: red sub-pixel, green sub-pixel and blue sub-pixel; the light emission data of the sub-pixel includes the light emission brightness and light emission duration of the sub-pixel in a statistical period;

[0029] Step S20: Periodically correct the luminance of at least one red sub-pixel: Input the lifetime loss of the blue sub-pixels around the red sub-pixel and the target luminance of the red sub-pixel into the red sub-pixel luminance model to calculate the luminance deviation of the red sub-pixel, and correct the current luminance of the red sub-pixel according to the luminance deviation, so that the corrected luminance value is equal to the luminance value of the red sub-pixel under the driving current corresponding to the target luminance, provided that the red sub-pixel has not emitted light before the surrounding blue sub-pixels.

[0030] The method for improving color shift in a display panel provided in the above embodiments periodically acquires the luminescence data of at least one blue sub-pixel within the display area of ​​the display panel, statistically analyzes the historical luminescence data of each blue sub-pixel, and determines the lifetime loss of the blue sub-pixel based on the statistical results. Each pixel includes three sub-pixels: a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The luminescence data of the sub-pixel includes its luminescence brightness and duration within a statistical period. The luminescence brightness of at least one red sub-pixel is periodically corrected: the lifetime loss of the surrounding blue sub-pixels and the target luminescence brightness of the red sub-pixel are input into a red sub-pixel luminescence model to calculate the brightness deviation of the red sub-pixel. The current luminescence brightness of the red sub-pixel is then corrected based on this brightness deviation, such that the corrected luminescence brightness value is equal to the luminescence value of the red sub-pixel under the driving current corresponding to the target luminescence brightness, assuming that the surrounding blue sub-pixels have not previously emitted light. This method can eliminate the influence of blue sub-pixel aging on the luminescence of surrounding red sub-pixels, thus improving the color shift of the screen.

[0031] In one exemplary implementation, historical luminescence data for each blue sub-pixel is statistically analyzed, and the lifetime loss of the blue sub-pixel is determined based on the statistical results, including:

[0032] For any blue sub-pixel, the lifetime loss of the blue sub-pixel is obtained by summing the products of its luminance and luminance duration over all historical statistical periods.

[0033] Assume the luminance of the blue sub-pixel in the i-th statistical period is L. i The duration of light emission is T i The lifetime loss P of the blue sub-pixel can be calculated using the following formula (1);

[0034] P=∑L i *T i (1)

[0035] In one exemplary implementation, the luminance of a subpixel within a statistical period includes the grayscale of the subpixel within that statistical period.

[0036] A statistical period can be 1 second or other durations. The length of the statistical period can be set according to actual needs. Assuming the grayscale range is 0-255, then grayscale 255 (maximum grayscale) represents the maximum luminous intensity, and grayscale 0 (minimum grayscale) represents the minimum luminous intensity.

[0037] Subpixel emission results in a loss of subpixel lifetime. If a subpixel does not emit light, the lifetime loss is zero. Every time a subpixel emits light, its lifetime is reduced. The amount of lifetime loss is related to both the emission brightness (grayscale) and the emission duration. For example, within the same emission duration, subpixels with higher brightness emit more light and experience greater lifetime loss. Similarly, at the same brightness, subpixels with longer emission durations emit more light and experience greater lifetime loss.

[0038] In one exemplary embodiment, the blue sub-pixels surrounding the red sub-pixel include: blue sub-pixels belonging to the same pixel as the red sub-pixel, or blue sub-pixels belonging to the same local area as the red sub-pixel; wherein, the display area of ​​the display panel is divided into multiple local areas, and each local area includes multiple pixels.

[0039] In one exemplary implementation, the local region comprises m*n pixels, where m and n are positive integers greater than 1; for example, the local region comprises 2*2 pixels or 3*3 pixels. The values ​​of m and n can be set according to actual needs.

[0040] Figure 3 This diagram illustrates a partial area division of a display panel. For example... Figure 3 As shown, in an exemplary embodiment, the display area of ​​the display panel is divided into a*b local areas, and each local area includes m*n pixels, where a = M / m and b = N / n; M is the total number of pixel rows in the display area of ​​the display panel, N is the total number of pixel columns in the display area of ​​the display panel, m is the total number of pixel rows in a local area, and n is the total number of pixel columns in a local area; m ≤ M and n ≤ N.

[0041] In one exemplary embodiment, the brightness deviation ΔL of the red sub-pixel is calculated using the following formula (2):

[0042]

[0043] Among them, L PL0 is the luminance of the red sub-pixel when the lifetime loss of the surrounding blue sub-pixels is P, driven by the corresponding driving current for maximum luminance. L0 is the luminance of the red sub-pixel when the lifetime loss of the surrounding blue sub-pixels is 0, driven by the corresponding driving current for maximum luminance. k is an adjustment coefficient, k≥1, and the value of k is negatively correlated with the target luminance of the red sub-pixel. That is, the larger the target luminance of the red sub-pixel, the smaller the value of k. For example, when the target luminance of the red sub-pixel is 255 gray levels, the adjustment coefficient k=1; when the target luminance of the red sub-pixel is 128 gray levels, the adjustment coefficient k>1, and the smaller the target luminance of the red sub-pixel, the larger the value of the adjustment coefficient k.

[0044] In one exemplary implementation, the lifetime loss of the blue sub-pixels surrounding the red sub-pixel includes:

[0045] The lifetime loss of blue sub-pixels belonging to the same pixel as the red sub-pixel; or the average lifetime loss of all blue sub-pixels belonging to the same local region as the red sub-pixel.

[0046] In one exemplary embodiment, the method further includes:

[0047] Multiple target luminance binding points are set, and multiple rounds of aging tests are performed on each target luminance binding point; wherein, the target luminance binding points are set at intervals from the minimum to the maximum value of the target luminance.

[0048] Curve fitting is performed on the test data of all wheel aging tests of the target luminance binding point to obtain the luminance curve of the red sub-pixel under the driving current corresponding to the target luminance binding point. The vertical axis of the luminance curve is the luminance deviation ΔL' of the red sub-pixel in the test area, and the horizontal axis of the luminance curve is the lifetime loss P of the blue sub-pixel in the test area.

[0049] Feature extraction is performed on the luminance curves of all target luminance binding points of the red sub-pixel to establish a red sub-pixel luminance model. The inputs of the red sub-pixel luminance model include: the lifetime loss of the blue sub-pixels surrounding the red sub-pixel and the target luminance of the red sub-pixel; the outputs of the red sub-pixel luminance model include: the luminance deviation ΔL of the red sub-pixel; wherein, the luminance deviation is the difference between the luminance value predicted by the red sub-pixel luminance model as the actual luminance value emitted by the red sub-pixel under the driving current corresponding to the target luminance and the luminance value emitted by the red sub-pixel under the driving current corresponding to the target luminance, assuming that the red sub-pixel has not emitted light before the surrounding blue sub-pixels.

[0050] The target luminance binding points are set at intervals from the minimum to the maximum value of the target luminance, including: the target luminance binding points are set at equal intervals or unequal intervals from the minimum to the maximum value of the target luminance.

[0051] The target luminance binding points are set at equal intervals from the minimum to the maximum value of the target luminance, for example, one target luminance binding point is set every 16 gray levels. Alternatively, the target luminance binding points can be set at unequal intervals from the minimum to the maximum value of the target luminance, for example, the interval between target luminance binding points set in the high gray level and the low gray level can be greater than the interval between target luminance binding points set in the intermediate gray level.

[0052] In one exemplary implementation, any round of aging test for any target luminance binding point includes:

[0053] A display panel sample of the same model as the display panel is statically displayed with a checkerboard pattern for a preset duration Ts. Then, the display screen of the display panel sample is switched to a red test screen. All black checkerboard areas are used as control areas, and all blue checkerboard areas are used as test areas. When the red test screen is displayed in the control area and the test area, the driving current of each red sub-pixel is the driving current corresponding to the target luminance binding point. The average luminance L1 of the control area and the average luminance L2 of the test area when the red test screen is displayed are obtained. The luminance deviation ΔL' of the red sub-pixels in the test area in this round of aging test is calculated. ΔL' is calculated using the following formula.

[0054]

[0055] Obtain the average brightness L3 of the test area when displaying a blue checkerboard pattern. Add the product of the average brightness L3 of this aging test and all previous aging tests to the preset duration Ts to obtain the lifetime loss P of the blue sub-pixel of the test area during this aging test.

[0056] Figure 4 A schematic diagram of the luminance curve of a red sub-pixel under the driving current corresponding to its maximum luminance is shown. Figure 4 As shown, the vertical axis of the luminance curve represents the luminance deviation ΔL of the red sub-pixel in the test area, and the horizontal axis of the luminance curve represents the lifetime loss P of the blue sub-pixel in the test area.

[0057] In one exemplary embodiment, correcting the current luminance L of the red sub-pixel based on the luminance deviation ΔL includes:

[0058] The corrected luminance is obtained by multiplying the current luminance L of the red sub-pixel by (1-ΔL).

[0059] In one exemplary embodiment, the display panel is an OLED display panel.

[0060] like Figure 5 As shown, this disclosure provides an apparatus for improving color shift in a display panel, comprising:

[0061] The data acquisition and statistics module 10 is configured to periodically acquire the luminous emission data of at least one blue sub-pixel within the display area of ​​the display panel, perform statistical analysis on the historical luminous emission data of each blue sub-pixel, and determine the lifetime loss of the blue sub-pixel based on the statistical results; wherein, any pixel includes three sub-pixels: a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the luminous emission data of the sub-pixel includes the luminous brightness and luminous duration of the sub-pixel within a statistical period;

[0062] The brightness correction module 20 is configured to periodically correct the luminance of at least one red sub-pixel: the lifetime loss of the blue sub-pixels surrounding the red sub-pixel and the target luminance of the red sub-pixel are input into the red sub-pixel luminance model to calculate the brightness deviation of the red sub-pixel, and the current luminance of the red sub-pixel is corrected according to the brightness deviation, so that the corrected luminance value is equal to the luminance value of the red sub-pixel under the driving current corresponding to the target luminance, provided that the red sub-pixel has not emitted light before the surrounding blue sub-pixels.

[0063] The apparatus for improving color shift in a display panel provided in the above embodiments includes a data acquisition and statistics module that periodically acquires the luminescence data of at least one blue sub-pixel within the display area of ​​the display panel, statistically analyzes the historical luminescence data of each blue sub-pixel, and determines the lifetime loss of the blue sub-pixel based on the statistical results. Each pixel includes three sub-pixels: a red sub-pixel, a green sub-pixel, and a blue sub-pixel. The luminescence data of the sub-pixel includes its luminescence brightness and duration within a statistical period. A brightness correction module periodically corrects the luminescence brightness of at least one red sub-pixel: it inputs the lifetime loss of the surrounding blue sub-pixels and the target luminescence brightness of the red sub-pixel into a red sub-pixel luminescence model to calculate the brightness deviation of the red sub-pixel. Based on the brightness deviation, it corrects the current luminescence brightness of the red sub-pixel so that the corrected luminescence brightness value is equal to the luminescence value of the red sub-pixel under the driving current corresponding to the target luminescence brightness, assuming that the surrounding blue sub-pixels have not previously emitted light. This apparatus can eliminate the influence of blue sub-pixel aging on the luminescence of surrounding red sub-pixels, thus improving the color shift of the screen.

[0064] In one exemplary implementation, the data acquisition and statistics module is configured to statistically analyze the historical luminescence data of each blue sub-pixel in the following manner, and determine the lifetime loss of the blue sub-pixel based on the statistical results:

[0065] For any blue sub-pixel, the lifetime loss of the blue sub-pixel is obtained by summing the products of its luminance and luminance duration over all historical statistical periods.

[0066] Assume the luminance of the blue sub-pixel in the i-th statistical period is L. i The duration of light emission is T i The lifetime loss P of the blue sub-pixel can be calculated using the following formula (1);

[0067] P=∑L i *T i (1)

[0068] In one exemplary implementation, the luminance of a subpixel within a statistical period includes the grayscale of the subpixel within that statistical period.

[0069] In one exemplary embodiment, the blue sub-pixels surrounding the red sub-pixel include: blue sub-pixels belonging to the same pixel as the red sub-pixel, or blue sub-pixels belonging to the same local area as the red sub-pixel; wherein, the display area of ​​the display panel is divided into multiple local areas, and each local area includes multiple pixels.

[0070] In one exemplary embodiment, the brightness deviation ΔL of the red sub-pixel is calculated using the following formula (2):

[0071]

[0072] Among them, L P L0 is the luminance of the red sub-pixel when the lifetime loss of the surrounding blue sub-pixels is P, driven by the corresponding driving current for maximum luminance. L0 is the luminance of the red sub-pixel when the lifetime loss of the surrounding blue sub-pixels is 0, driven by the corresponding driving current for maximum luminance. k is an adjustment coefficient, k≥1, and the value of k is negatively correlated with the target luminance of the red sub-pixel. That is, the larger the target luminance of the red sub-pixel, the smaller the value of k. For example, when the target luminance of the red sub-pixel is 255 gray levels, the adjustment coefficient k=1; when the target luminance of the red sub-pixel is 128 gray levels, the adjustment coefficient k>1, and the smaller the target luminance of the red sub-pixel, the larger the value of the adjustment coefficient k.

[0073] In one exemplary implementation, the lifetime loss of the blue sub-pixels surrounding the red sub-pixel includes:

[0074] The lifetime loss of blue sub-pixels belonging to the same pixel as the red sub-pixel; or the average lifetime loss of all blue sub-pixels belonging to the same local region as the red sub-pixel.

[0075] In one exemplary embodiment, the apparatus further includes: a model building module 30;

[0076] The model building module is configured to set multiple target luminance binding points and perform multiple rounds of aging tests for each target luminance binding point; wherein the target luminance binding points are set at intervals from the minimum to the maximum value of the target luminance.

[0077] Curve fitting is performed on the test data of all wheel aging tests of the target luminance binding point to obtain the luminance curve of the red sub-pixel under the driving current corresponding to the target luminance binding point. The vertical axis of the luminance curve is the luminance deviation ΔL' of the red sub-pixel in the test area, and the horizontal axis of the luminance curve is the lifetime loss P of the blue sub-pixel in the test area.

[0078] Feature extraction is performed on the luminance curves of all target luminance binding points of the red sub-pixel to establish a red sub-pixel luminance model. The inputs of the red sub-pixel luminance model include: the lifetime loss of the blue sub-pixels surrounding the red sub-pixel and the target luminance of the red sub-pixel; the outputs of the red sub-pixel luminance model include: the luminance deviation ΔL of the red sub-pixel; wherein, the luminance deviation is the difference between the luminance value predicted by the red sub-pixel luminance model as the actual luminance value emitted by the red sub-pixel under the driving current corresponding to the target luminance and the luminance value emitted by the red sub-pixel under the driving current corresponding to the target luminance, assuming that the red sub-pixel has not emitted light before the surrounding blue sub-pixels.

[0079] In one exemplary implementation, the model building module is configured to perform any round of aging tests on any target luminance binding point in the following manner:

[0080] A display panel sample of the same model as the display panel is statically displayed with a checkerboard pattern for a preset duration Ts. Then, the display screen of the display panel sample is switched to a red test screen. All black checkerboard areas are used as control areas, and all blue checkerboard areas are used as test areas. When the red test screen is displayed in the control area and the test area, the driving current of each red sub-pixel is the driving current corresponding to the target luminance binding point. The average luminance L1 of the control area and the average luminance L2 of the test area when the red test screen is displayed are obtained. The luminance deviation ΔL' of the red sub-pixels in the test area in this round of aging test is calculated. ΔL' is calculated using the following formula.

[0081]

[0082] Obtain the average brightness L3 of the test area when displaying a blue checkerboard pattern. Add the product of the average brightness L3 of this aging test and all previous aging tests to the preset duration Ts to obtain the lifetime loss P of the blue sub-pixel of the test area during this aging test.

[0083] In one exemplary embodiment, the brightness correction module is configured to correct the current luminance L of the red sub-pixel according to the brightness deviation ΔL by multiplying the current luminance L of the red sub-pixel by (1-ΔL) to obtain the corrected luminance.

[0084] like Figure 6 As shown in the figure, this disclosure provides an apparatus for improving color shift of a display panel, including: a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, implements the steps of the above-described method for improving color shift of a display panel.

[0085] This disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method for improving color shift of a display panel described above.

[0086] This disclosure provides a display device, including the aforementioned device for improving color shift of a display panel.

[0087] In one exemplary embodiment, the display panel is an OLED display panel.

[0088] The display device can be any product or component with a display function, such as a mobile phone, tablet computer, wearable device, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the invention.

[0089] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

Claims

1. A method for improving color shift in a display panel, comprising: Periodically acquire the luminescence data of at least one blue sub-pixel within the display area of ​​the display panel, statistically analyze the historical luminescence data of each blue sub-pixel, and determine the lifetime loss of the blue sub-pixel based on the statistical results; wherein, any pixel includes three sub-pixels: a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the luminescence data of the sub-pixel includes the luminescence brightness and luminescence duration of the sub-pixel within a statistical period; The luminance of at least one red sub-pixel is periodically corrected: the lifetime loss of the blue sub-pixels surrounding the red sub-pixel and the target luminance of the red sub-pixel are input into the red sub-pixel luminance model to calculate the luminance deviation of the red sub-pixel. The current luminance of the red sub-pixel is corrected according to the luminance deviation, so that the corrected luminance value is equal to the luminance value of the red sub-pixel under the driving current corresponding to the target luminance, provided that the red sub-pixel has not emitted light before the surrounding blue sub-pixels. Among them, the brightness deviation of the red sub-pixel The following formula is used for calculation: in, It is the luminance corresponding to the driving current corresponding to the maximum luminance when the lifetime loss of the red sub-pixel in the surrounding blue sub-pixels is P. It is the luminance corresponding to the driving current corresponding to the maximum luminance when the lifetime loss of the red sub-pixel is 0 and the surrounding blue sub-pixels are used; k is the adjustment coefficient; The current luminance L of the red sub-pixel is corrected based on the luminance deviation ΔL, including: The corrected luminance is obtained by multiplying the current luminance L of the red sub-pixel by (1-ΔL).

2. The method according to claim 1, characterized in that: The historical luminescence data of each blue sub-pixel is statistically analyzed, and the lifetime loss of the blue sub-pixel is determined based on the statistical results, including: For any blue sub-pixel, the lifetime loss of the blue sub-pixel is obtained by summing the products of its luminance and luminance duration over all historical statistical periods.

3. The method according to claim 1, characterized in that: The blue sub-pixels surrounding the red sub-pixel include: blue sub-pixels belonging to the same pixel as the red sub-pixel, or blue sub-pixels belonging to the same local area as the red sub-pixel; wherein, the display area of ​​the display panel is divided into multiple local areas, and each local area includes multiple pixels; The lifetime loss of the blue sub-pixels surrounding the red sub-pixel includes: The lifetime loss of blue sub-pixels belonging to the same pixel as the red sub-pixel; or the average lifetime loss of all blue sub-pixels belonging to the same local region as the red sub-pixel.

4. The method according to claim 1, characterized in that: The adjustment coefficient k≥1, and the value of k is negatively correlated with the target luminance of the red sub-pixel.

5. The method according to claim 4, characterized in that, The method further includes: Multiple target luminance binding points are set, and multiple rounds of aging tests are performed on each target luminance binding point; wherein, the target luminance binding points are set at intervals from the minimum to the maximum value of the target luminance. Curve fitting is performed on the test data of all wheel aging tests of the target luminance binding point to obtain the luminance curve of the red sub-pixel under the driving current corresponding to the target luminance binding point. The vertical axis of the luminance curve is the luminance deviation ΔL' of the red sub-pixel in the test area, and the horizontal axis of the luminance curve is the lifetime loss P of the blue sub-pixel in the test area. Feature extraction is performed on the luminance curves of all target luminance binding points of the red sub-pixel to establish a red sub-pixel luminance model. The inputs of the red sub-pixel luminance model include: the lifetime loss of the blue sub-pixels surrounding the red sub-pixel and the target luminance of the red sub-pixel; the outputs of the red sub-pixel luminance model include: the luminance deviation of the red sub-pixel. The brightness deviation is the difference between the actual brightness value of the red sub-pixel under the driving current corresponding to the target brightness, as predicted by the red sub-pixel emission model, and the brightness value of the red sub-pixel under the driving current corresponding to the target brightness, provided that the red sub-pixel has not emitted light before the surrounding blue sub-pixels.

6. The method according to claim 5, characterized in that: Any aging test for any target luminance binding point includes: A display panel sample of the same model as the display panel is statically displayed with a checkerboard pattern for a preset duration Ts. Then, the display screen of the display panel sample is switched to a red test screen. All black checkerboard areas are used as control areas, and all blue checkerboard areas are used as test areas. When the red test screen is displayed in the control area and the test area, the driving current of each red sub-pixel is the driving current corresponding to the target luminance binding point. The average luminance L1 of the control area and the average luminance L2 of the test area when the red test screen is displayed are obtained. The luminance deviation ΔL' of the red sub-pixels in the test area in this round of aging test is calculated. ΔL' is calculated using the following formula. Obtain the average brightness L3 of the test area when displaying a blue checkerboard pattern. Add the product of the average brightness L3 of this aging test and all previous aging tests to the preset duration Ts to obtain the lifetime loss P of the blue sub-pixel of the test area during this aging test.

7. An apparatus for improving color shift in a display panel, comprising: The data acquisition and statistics module is configured to periodically acquire the luminous emission data of at least one blue sub-pixel within the display area of ​​the display panel, statistically analyze the historical luminous emission data of each blue sub-pixel, and determine the lifetime loss of the blue sub-pixel based on the statistical results; wherein any pixel includes three sub-pixels: a red sub-pixel, a green sub-pixel, and a blue sub-pixel; the luminous emission data of the sub-pixel includes the luminous brightness and luminous duration of the sub-pixel within a statistical period; The brightness correction module is configured to periodically correct the luminance of at least one red sub-pixel: the lifetime loss of the blue sub-pixels surrounding the red sub-pixel and the target luminance of the red sub-pixel are input into the red sub-pixel luminance model to calculate the brightness deviation of the red sub-pixel, and the current luminance of the red sub-pixel is corrected according to the brightness deviation, so that the corrected luminance value is equal to the luminance value of the red sub-pixel under the driving current corresponding to the target luminance, provided that the red sub-pixel has not emitted light before the surrounding blue sub-pixels. Among them, the brightness deviation of the red sub-pixel The following formula is used for calculation: in, It is the luminance corresponding to the driving current corresponding to the maximum luminance when the lifetime loss of the red sub-pixel in the surrounding blue sub-pixels is P. It is the luminance corresponding to the driving current corresponding to the maximum luminance when the lifetime loss of the red sub-pixel is 0 and the surrounding blue sub-pixels are used; k is the adjustment coefficient; The current luminance L of the red sub-pixel is corrected based on the luminance deviation ΔL, including: The corrected luminance is obtained by multiplying the current luminance L of the red sub-pixel by (1-ΔL).

8. An apparatus for improving color shift in a display panel, comprising: A memory and a processor, wherein the memory stores a computer program, which, when executed by the processor, implements the steps of the method for improving color shift of a display panel as described in any one of claims 1-6.

9. A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method for improving color shift of a display panel as described in any one of claims 1-6.

10. A display device, comprising: The apparatus for improving color shift of a display panel as described in claim 7 or 8 above.

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