CN117174027A - Method and device for improving color cast of display panel, storage medium and display device - Google Patents
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Abstract
Disclosed herein are a method and apparatus for improving color cast of a display panel and a display device. The method comprises the following steps: periodically acquiring the light-emitting data of at least one blue sub-pixel of the display panel, counting the historical light-emitting data of the blue sub-pixel, and determining the service life loss of the blue sub-pixel according to the counting result; the light emission luminance of at least one red subpixel is periodically corrected: the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels are input into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and the current luminous brightness of the red sub-pixels is corrected according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the surrounding blue sub-pixels do not emit light before. The scheme can eliminate the influence of the aging of the blue sub-pixels on the light emission of the surrounding red sub-pixels, and improve the color cast of the screen.
Description
Technical Field
The present application relates to display technologies, and in particular, to a method and apparatus for improving color shift of a display panel, a storage medium, and a display device.
Background
With the development of display technology, the variety of displays is increasing, and OLED (Organic LightEmitting Diode ) displays have significant advantages in terms of response speed, color expression, viewing angle, screen thickness, light emitting efficiency, and the like, and thus are widely used in various electronic products.
The light emitting material of the OLED display is an organic light emitting material, which gradually ages over time. In addition, displaying still images for long periods of time, high brightness usage, and environmental factors (such as temperature and humidity) may also accelerate the aging process of the OLED display.
The OLED display includes three primary colors of red, blue and green, but the aging speeds of the luminescent materials of the three primary colors are different, and after a period of time, the attenuation degrees of the luminescent brightness of the blue, red and green luminescent devices are different, so that the color cast phenomenon of the display panel occurs.
Disclosure of Invention
The embodiment of the application provides a method for improving color cast of a display panel, which comprises the following steps:
periodically acquiring the luminous data of at least one blue sub-pixel in a display area of a display panel, counting the historical luminous data of each blue sub-pixel, and determining the service life loss of the blue sub-pixel according to a counting result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period;
the light emission luminance of at least one red subpixel is periodically corrected: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels.
The embodiment of the application provides a device for improving color cast of a display panel, which comprises the following components:
the data acquisition and statistics module is used for periodically acquiring the luminous data of at least one blue sub-pixel in the display area of the display panel, counting the historical luminous data of each blue sub-pixel and determining the service life loss of the blue sub-pixel according to the statistical result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period;
a luminance correction module configured to periodically correct the light emission luminance of at least one red subpixel: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels.
The embodiment of the application provides a device for improving color cast of a display panel, which comprises the following components: the display device comprises a memory and a processor, wherein the memory stores a computer program which realizes the steps of the method for improving the color cast of the display panel when being executed by the processor.
An embodiment of the present application provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the above method for improving color shift of a display panel.
An embodiment of the present application provides a display device including: the device for improving the color cast of the display panel.
Compared with the related art, the embodiment of the application provides a method, a device and a display device for improving color cast of a display panel, which are used for periodically acquiring the luminous data of at least one blue sub-pixel in a display area of the display panel, counting the historical luminous data of each blue sub-pixel and determining the service life loss of the blue sub-pixel according to a counting result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period; the light emission luminance of at least one red subpixel is periodically corrected: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels. The scheme can eliminate the influence of the aging of the blue sub-pixels on the light emission of surrounding red sub-pixels and improve the color cast of the screen.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. Other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
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The accompanying drawings are included to provide an understanding of the principles of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the principles of the application.
FIG. 1 is a schematic view of a color checkerboard image according to an embodiment of the present application;
FIG. 2 is a flowchart of a method for improving color cast of a display panel according to an embodiment of the present application;
fig. 3 is a schematic view illustrating partial area division of a display panel according to an embodiment of the present application;
fig. 4 is a schematic diagram of a light-emitting brightness curve of a red sub-pixel under a driving current corresponding to a maximum light-emitting brightness according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of an apparatus for improving color cast of a display panel according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another device for improving color cast of a display panel according to an embodiment of the application.
Detailed Description
The present application has been described in terms of several embodiments, but the description is illustrative and not restrictive, and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the described embodiments. 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 possible. Any feature or element of any embodiment may be used in combination with or in place of any other feature or element of any other embodiment unless specifically limited.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The disclosed embodiments, features and elements of the present application may also be combined with any conventional features or elements to form a unique inventive arrangement as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive arrangements to form another unique inventive arrangement as defined in the claims. It is therefore to be understood that any of the features shown and/or discussed in the present application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Further, various modifications and changes may be made within the scope of the appended claims.
Furthermore, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Accordingly, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Furthermore, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
Before the OLED display panel leaves the factory, an aging test is usually required to be carried out on the display panel, and the checkerboard aging test is a common aging experiment. FIG. 1 is a schematic diagram of a color checkerboard screen. The color checkerboard picture includes black, white, green, red, and blue. The OLED display panel displays a color checkerboard picture for a long time in a static state, and after a period of time, a special test picture (usually a single-color picture) is used for detecting whether the brightness of each pixel point on the screen is attenuated or not. During the aging test, it was found that the blue checkered region was abnormally increased in brightness when the red test screen was displayed. The application provides a method for improving color cast of a display panel to solve the problem.
As shown in fig. 2, an embodiment of the present disclosure provides a method for improving color shift of a display panel, including:
step S10, periodically acquiring the luminous data of at least one blue sub-pixel in a display area of a display panel, counting the historical luminous data of each blue sub-pixel, and determining the life loss of the blue sub-pixel according to a counting result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period;
step S20, periodically correcting the light emitting brightness of at least one red subpixel: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels.
According to the method for improving color cast of the display panel, provided by the embodiment, the light-emitting data of at least one blue sub-pixel in the display area of the display panel are periodically obtained, the historical light-emitting data of each blue sub-pixel are counted, and the service life loss of the blue sub-pixel is determined according to the counted result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period; the light emission luminance of at least one red subpixel is periodically corrected: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels. The method can eliminate the influence of the aging of the blue sub-pixels on the light emission of the surrounding red sub-pixels, and improve the color cast of the screen.
In an exemplary embodiment, counting historical luminescence data of each blue sub-pixel, and determining a lifetime loss amount of the blue sub-pixel according to a result of the counting includes:
and accumulating the products of the luminous brightness and the luminous duration of the blue sub-pixel in all historical statistical periods for any blue sub-pixel to obtain the service life loss of the blue sub-pixel.
Let the luminous brightness of the blue sub-pixel in the ith statistical period be L i The luminous duration is T i The lifetime loss amount P of the blue sub-pixel may be calculated using the following formula (1);
P＝∑L i *T i (1)
in an exemplary embodiment, the emission brightness of the sub-pixel in one statistical period includes: the sub-pixels are gray-scale in one statistical period.
One statistical period may be 1 second or other duration. The length of the statistical period can be set according to actual needs. Assuming that the gray scale range is 0 to 255, a gray scale of 255 (maximum gray scale) represents the maximum light emission luminance, and a gray scale of 0 (minimum gray scale) represents the minimum light emission luminance.
The subpixel emits light at a lifetime loss of the subpixel, and the lifetime loss amount is 0 when the subpixel does not emit light, and the lifetime loss amount is related to the light emission luminance (gray scale) and the light emission period as long as the subpixel emits light. For example, the higher the light emission luminance, the larger the total amount of light emission of the sub-pixel, and the larger the lifetime loss amount within the same light emission period. For another example, the longer the light emission period, the larger the total amount of light emission of the sub-pixel, and the larger the lifetime loss.
In an exemplary embodiment, the blue sub-pixel surrounding the red sub-pixel includes: a blue sub-pixel belonging to the same pixel as the red sub-pixel, or a blue sub-pixel belonging to the same partial region as the red sub-pixel; the display area of the display panel is divided into a plurality of local areas, and each local area comprises a plurality of pixels.
In an exemplary embodiment, the local area includes m×n pixels, m and n are positive integers greater than 1; for example, the local area includes 2×2 pixels, or 3*3 pixels. Wherein, the values of m and n can be set according to actual needs.
Fig. 3 shows a schematic view of partial area division of a display panel. As shown in fig. 3, in an exemplary embodiment, a display area of the display panel is divided into a×b partial areas, and one partial area includes m×n pixels, a=m/M, and b=n/N; m is the total number of rows of pixel rows of the display panel display area, N is the total number of columns of pixel columns of the display panel display area, M is the total number of rows of pixel rows of a partial area, and N is the total number of columns of pixel columns of a partial area; m is less than or equal to M, and N is less than or equal to N.
In an exemplary embodiment, the luminance deviation Δl of the red subpixel is calculated using the following formula (2):
wherein L is P The red sub-pixel is driven by a driving current corresponding to the maximum light-emitting brightness when the life loss of the surrounding blue sub-pixels is P, L 0 The red sub-pixel adopts the corresponding light-emitting brightness when driven by the driving current corresponding to the maximum light-emitting brightness when the service life loss of the surrounding blue sub-pixels is 0; k is an adjusting coefficient, k is more than or equal to 1, and the value of k has a negative correlation with the target luminous brightness of the red sub-pixel. That is, the greater the target light emission luminance of the red subpixel, the smaller the k value. For example, when the target emission luminance of the red subpixel is 255 gray scale, the adjustment coefficient k=1; when the target luminous brightness of the red sub-pixel is 128 gray scales, the adjustment coefficient k>1, and the smaller the target light emission luminance of the red sub-pixel, the larger the k value of the adjustment coefficient.
In an exemplary embodiment, the lifetime loss of the blue sub-pixels around the red sub-pixel includes:
a lifetime loss amount of a blue sub-pixel belonging to the same pixel as the red sub-pixel; or the average of the lifetime loss amounts of all blue sub-pixels belonging to one local area with the red sub-pixel.
In an exemplary embodiment, the method further comprises:
setting a plurality of target luminous brightness binding points, and performing multiple-round aging tests aiming at each target luminous brightness binding point; the target luminous brightness binding points are arranged at intervals from the minimum value to the maximum value of the target luminous brightness;
performing curve fitting on test data of all round aging tests of the target luminous brightness binding points to obtain a luminous brightness curve of the red sub-pixel under driving current corresponding to the target luminous brightness binding points, wherein the ordinate of the luminous brightness curve is the brightness deviation delta L' of the red sub-pixel of the region to be tested, and the abscissa of the luminous brightness curve is the service life loss P of the blue sub-pixel of the region to be tested;
feature extraction is carried out on the luminous brightness curves of all target luminous brightness binding points of the red sub-pixels, a red sub-pixel luminous model is built, and the input quantity of the red sub-pixel luminous model comprises: the lifetime loss of the blue sub-pixels around the red sub-pixel and the target light emission luminance of the red sub-pixel; the output quantity of the red sub-pixel luminescence model comprises: a luminance deviation Δl of the red subpixel; the brightness deviation is a difference value of a brightness value of the red sub-pixel predicted by the red sub-pixel light-emitting model to emit light under the driving current corresponding to the target light-emitting brightness on the premise that the red sub-pixel does not emit light before surrounding blue sub-pixels.
The target light-emitting brightness binding point is set from the minimum value to the maximum value of the target light-emitting brightness at intervals, and comprises the following steps: the target luminous brightness binding points are equidistantly arranged at intervals or non-equidistantly arranged at intervals from the minimum value to the maximum value of the target luminous brightness.
The target light-emitting brightness binding points are equidistantly and alternately arranged from the minimum value to the maximum value of the target light-emitting brightness, for example, one target light-emitting brightness binding point is arranged every 16 gray scales. The target light-emitting brightness binding points are set at unequal intervals from the minimum value to the maximum value of the target light-emitting brightness, for example, the intervals of the target light-emitting brightness binding points set in the high-gray stage and the low-gray stage can be larger than the intervals of the target light-emitting brightness binding points set in the middle gray stage.
In an exemplary embodiment, any one round of aging test of any one target light-emitting luminance binding point includes:
controlling a display panel sample of the same type as the display panel to statically display a checkerboard picture for a preset period of time Ts, switching the display picture of the display panel sample into a red test picture, taking all black checkerboard areas as comparison areas and all blue checkerboard areas as areas to be tested, wherein the drive current of each red sub-pixel is the drive current corresponding to a target luminous brightness binding point when the comparison areas and the areas to be tested display the red test picture; obtaining average brightness L1 of the contrast area when displaying the red test picture and average brightness L2 of the area to be tested when displaying the red test picture, calculating brightness deviation delta L ', delta L' of red sub-pixels of the area to be tested in the round of aging test, and calculating by adopting the following formula;
and obtaining the average brightness L3 of the region to be tested when the blue checkerboard picture is displayed, and accumulating the products of the average brightness L3 of the round of aging test and all previous rounds of aging test and the preset time period Ts to obtain the service life loss P of the blue sub-pixels of the region to be tested during the round of aging test.
Fig. 4 shows a schematic diagram of an emission luminance curve of a red subpixel at a driving current corresponding to a maximum emission luminance. As shown in fig. 4, the ordinate of the light-emitting luminance curve is the luminance deviation Δl of the red sub-pixel in the region to be measured, and the abscissa of the light-emitting luminance curve is the lifetime loss P of the blue sub-pixel in the region to be measured.
In an exemplary embodiment, correcting the current light emission luminance L of the red subpixel according to the luminance deviation Δl includes:
and multiplying the current luminous brightness L of the red sub-pixel by (1-delta L) to obtain corrected luminous brightness.
In one exemplary embodiment, the display panel is an OLED display panel.
As shown in fig. 5, an embodiment of the present disclosure provides an apparatus for improving color shift of a display panel, including:
the data acquisition and statistics module 10 is configured to periodically acquire light-emitting data of at least one blue sub-pixel in a display area of the display panel, count historical light-emitting data of each blue sub-pixel, and determine life loss of the blue sub-pixel according to a statistical result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period;
the luminance correction module 20 is configured to periodically correct the light emission luminance of at least one red subpixel: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels.
According to the device for improving color cast of the display panel, the data acquisition and statistics module periodically acquires the luminous data of at least one blue sub-pixel in the display area of the display panel, performs statistics on the historical luminous data of each blue sub-pixel, and determines the life loss of the blue sub-pixel according to the statistical result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period; the brightness correction module corrects the luminous brightness of at least one red sub-pixel periodically: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels. The device can eliminate the influence of the aging of the blue sub-pixels on the light emission of the surrounding red sub-pixels, and improve the color cast of the screen.
In an exemplary embodiment, the data acquisition and statistics module is configured to perform statistics on the historical luminescence data of each blue sub-pixel, and determine the lifetime loss of the blue sub-pixel according to the statistics result:
and accumulating the products of the luminous brightness and the luminous duration of the blue sub-pixel in all historical statistical periods for any blue sub-pixel to obtain the service life loss of the blue sub-pixel.
Let the luminous brightness of the blue sub-pixel in the ith statistical period be L i The luminous duration is T i The lifetime loss amount P of the blue sub-pixel may be calculated using the following formula (1);
P＝∑L i *T i (1)
in an exemplary embodiment, the emission brightness of the sub-pixel in one statistical period includes: the sub-pixels are gray-scale in one statistical period.
In an exemplary embodiment, the blue sub-pixel surrounding the red sub-pixel includes: a blue sub-pixel belonging to the same pixel as the red sub-pixel, or a blue sub-pixel belonging to the same partial region as the red sub-pixel; the display area of the display panel is divided into a plurality of local areas, and each local area comprises a plurality of pixels.
In an exemplary embodiment, the luminance deviation Δl of the red subpixel is calculated using the following formula (2):
wherein L is P The red sub-pixel is driven by a driving current corresponding to the maximum light-emitting brightness when the life loss of the surrounding blue sub-pixels is P, L 0 The red sub-pixel adopts the corresponding light-emitting brightness when driven by the driving current corresponding to the maximum light-emitting brightness when the service life loss of the surrounding blue sub-pixels is 0; k is an adjusting coefficient, k is more than or equal to 1, and the value of k has a negative correlation with the target luminous brightness of the red sub-pixel. That is, the greater the target light emission luminance of the red subpixel, the smaller the k value. For example, when the target emission luminance of the red subpixel is 255 gray scale, the adjustment coefficient k=1; when the target luminous brightness of the red sub-pixel is 128 gray scales, the adjustment coefficient k>1, and the smaller the target light emission luminance of the red sub-pixel, the larger the k value of the adjustment coefficient.
In an exemplary embodiment, the lifetime loss of the blue sub-pixels around the red sub-pixel includes:
a lifetime loss amount of a blue sub-pixel belonging to the same pixel as the red sub-pixel; or the average of the lifetime loss amounts of all blue sub-pixels belonging to one local area with the red sub-pixel.
In an exemplary embodiment, the apparatus further comprises: a model building module 30;
the model building module is set to set a plurality of target luminous brightness binding points, and performs multiple-round aging tests aiming at each target luminous brightness binding point; the target luminous brightness binding points are arranged at intervals from the minimum value to the maximum value of the target luminous brightness;
performing curve fitting on test data of all round aging tests of the target luminous brightness binding points to obtain a luminous brightness curve of the red sub-pixel under driving current corresponding to the target luminous brightness binding points, wherein the ordinate of the luminous brightness curve is the brightness deviation delta L' of the red sub-pixel of the region to be tested, and the abscissa of the luminous brightness curve is the service life loss P of the blue sub-pixel of the region to be tested;
feature extraction is carried out on the luminous brightness curves of all target luminous brightness binding points of the red sub-pixels, a red sub-pixel luminous model is built, and the input quantity of the red sub-pixel luminous model comprises: the lifetime loss of the blue sub-pixels around the red sub-pixel and the target light emission luminance of the red sub-pixel; the output quantity of the red sub-pixel luminescence model comprises: a luminance deviation Δl of the red subpixel; the brightness deviation is a difference value of a brightness value of the red sub-pixel predicted by the red sub-pixel light-emitting model to emit light under the driving current corresponding to the target light-emitting brightness on the premise that the red sub-pixel does not emit light before surrounding blue sub-pixels.
In an exemplary embodiment, the model building module is configured to perform any one round of aging test of any one target light-emitting brightness binding point in the following manner:
controlling a display panel sample of the same type as the display panel to statically display a checkerboard picture for a preset period of time Ts, switching the display picture of the display panel sample into a red test picture, taking all black checkerboard areas as comparison areas and all blue checkerboard areas as areas to be tested, wherein the drive current of each red sub-pixel is the drive current corresponding to a target luminous brightness binding point when the comparison areas and the areas to be tested display the red test picture; obtaining average brightness L1 of the contrast area when displaying the red test picture and average brightness L2 of the area to be tested when displaying the red test picture, calculating brightness deviation delta L ', delta L' of red sub-pixels of the area to be tested in the round of aging test, and calculating by adopting the following formula;
and obtaining the average brightness L3 of the region to be tested when the blue checkerboard picture is displayed, and accumulating the products of the average brightness L3 of the round of aging test and all previous rounds of aging test and the preset time period Ts to obtain the service life loss P of the blue sub-pixels of the region to be tested during the round of aging test.
In an exemplary embodiment, the brightness correction module is configured to correct the current light-emitting brightness L of the red subpixel according to the brightness deviation Δl in the following manner: and multiplying the current luminous brightness L of the red sub-pixel by (1-delta L) to obtain corrected luminous brightness.
As shown in fig. 6, an embodiment of the present disclosure provides an apparatus for improving color shift of a display panel, including: the display device comprises a memory and a processor, wherein the memory stores a computer program which realizes the steps of the method for improving the color cast of the display panel when being executed by the processor.
The disclosed embodiments provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the above method of improving color shift of a display panel.
The embodiment of the disclosure provides a display device, comprising: the device for improving the color cast of the display panel.
In one exemplary embodiment, the display panel is an OLED display panel.
The display device may be: any product or component with display function such as a mobile phone, a tablet computer, a wearable device, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device will be understood by those skilled in the art, and are not described herein in detail, nor should they be considered as limiting the application.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the 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. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
Claims (11)
1. A method of improving color shift of a display panel, comprising:
periodically acquiring the luminous data of at least one blue sub-pixel in a display area of a display panel, counting the historical luminous data of each blue sub-pixel, and determining the service life loss of the blue sub-pixel according to a counting result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period;
the light emission luminance of at least one red subpixel is periodically corrected: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels.
2. The method according to claim 1, characterized in that:
counting the historical luminescence data of each blue sub-pixel, and determining the service life loss of the blue sub-pixel according to the counting result, wherein the method comprises the following steps:
and accumulating the products of the luminous brightness and the luminous duration of the blue sub-pixel in all historical statistical periods for any blue sub-pixel to obtain the service life loss of the blue sub-pixel.
3. The method according to claim 1, characterized in that:
a blue sub-pixel surrounding the red sub-pixel, comprising: a blue sub-pixel belonging to the same pixel as the red sub-pixel, or a blue sub-pixel belonging to the same partial region as the red sub-pixel; the display area of the display panel is divided into a plurality of local areas, and each local area comprises a plurality of pixels;
the lifetime consumption amount of the blue sub-pixels around the red sub-pixel includes:
a lifetime loss amount of a blue sub-pixel belonging to the same pixel as the red sub-pixel; or the average of the lifetime loss amounts of all blue sub-pixels belonging to one local area with the red sub-pixel.
4. The method according to claim 1, characterized in that:
the luminance deviation Δl of the red subpixel is calculated using the following formula:
wherein L is P The red sub-pixel is driven by a driving current corresponding to the maximum light-emitting brightness when the life loss of the surrounding blue sub-pixels is P, L 0 The red sub-pixel adopts the corresponding light-emitting brightness when driven by the driving current corresponding to the maximum light-emitting brightness when the service life loss of the surrounding blue sub-pixels is 0; k is an adjusting coefficient, k is more than or equal to 1, and the value of k has a negative correlation with the target luminous brightness of the red sub-pixel.
5. The method according to claim 4, wherein the method further comprises:
setting a plurality of target luminous brightness binding points, and performing multiple-round aging tests aiming at each target luminous brightness binding point; the target luminous brightness binding points are arranged at intervals from the minimum value to the maximum value of the target luminous brightness;
performing curve fitting on test data of all round aging tests of the target luminous brightness binding points to obtain a luminous brightness curve of the red sub-pixel under driving current corresponding to the target luminous brightness binding points, wherein the ordinate of the luminous brightness curve is the brightness deviation delta L' of the red sub-pixel of the region to be tested, and the abscissa of the luminous brightness curve is the service life loss P of the blue sub-pixel of the region to be tested;
feature extraction is carried out on the luminous brightness curves of all target luminous brightness binding points of the red sub-pixels, a red sub-pixel luminous model is built, and the input quantity of the red sub-pixel luminous model comprises: the lifetime loss of the blue sub-pixels around the red sub-pixel and the target light emission luminance of the red sub-pixel; the output quantity of the red sub-pixel luminescence model comprises: a luminance deviation Δl of the red subpixel; the brightness deviation is a difference value of a brightness value of the red sub-pixel predicted by the red sub-pixel light-emitting model to emit light under the driving current corresponding to the target light-emitting brightness on the premise that the red sub-pixel does not emit light before surrounding blue sub-pixels.
6. The method according to claim 5, wherein:
any round of aging test of any one target luminous brightness binding point comprises the following steps:
controlling a display panel sample of the same type as the display panel to statically display a checkerboard picture for a preset period of time Ts, switching the display picture of the display panel sample into a red test picture, taking all black checkerboard areas as comparison areas and all blue checkerboard areas as areas to be tested, wherein the drive current of each red sub-pixel is the drive current corresponding to a target luminous brightness binding point when the comparison areas and the areas to be tested display the red test picture; obtaining average brightness L1 of the contrast area when displaying the red test picture and average brightness L2 of the area to be tested when displaying the red test picture, calculating brightness deviation delta L ', delta L' of red sub-pixels of the area to be tested in the round of aging test, and calculating by adopting the following formula;
and obtaining the average brightness L3 of the region to be tested when the blue checkerboard picture is displayed, and accumulating the products of the average brightness L3 of the round of aging test and all previous rounds of aging test and the preset time period Ts to obtain the service life loss P of the blue sub-pixels of the region to be tested during the round of aging test.
7. The method according to claim 4, wherein:
correcting the current light-emitting brightness L of the red sub-pixel according to the brightness deviation delta L, wherein the method comprises the following steps:
and multiplying the current luminous brightness L of the red sub-pixel by (1-delta L) to obtain corrected luminous brightness.
8. An apparatus for improving color cast of a display panel, comprising:
the data acquisition and statistics module is used for periodically acquiring the luminous data of at least one blue sub-pixel in the display area of the display panel, counting the historical luminous data of each blue sub-pixel and determining the service life loss of the blue sub-pixel according to the statistical result; wherein any one pixel includes three sub-pixels: red, green, and blue sub-pixels; the luminous data of the sub-pixels comprise luminous brightness and luminous duration of the sub-pixels in a statistical period;
a luminance correction module configured to periodically correct the light emission luminance of at least one red subpixel: and inputting the service life loss of the blue sub-pixels around the red sub-pixels and the target luminous brightness of the red sub-pixels into a red sub-pixel luminous model to calculate to obtain the brightness deviation of the red sub-pixels, and correcting the current luminous brightness of the red sub-pixels according to the brightness deviation, so that the corrected luminous brightness value is equal to the luminous brightness value of the red sub-pixels under the driving current corresponding to the target luminous brightness on the premise that the red sub-pixels do not emit light before the surrounding blue sub-pixels.
9. An apparatus for improving color cast of a display panel, comprising: a memory and a processor, the memory storing a computer program which, when executed by the processor, performs the steps of the method of improving color shift of a display panel as claimed in any one of claims 1 to 7.
10. A computer readable storage medium storing a computer program which when executed by a processor performs the steps of the method of improving color shift of a display panel according to any one of the preceding claims 1-7.
11. A display device, comprising: the apparatus for improving color cast of display panel according to claim 8 or 9.
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| CN202311245034.2A CN117174027A (en) | 2023-09-25 | 2023-09-25 | Method and device for improving color cast of display panel, storage medium and display device |
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| CN202311245034.2A CN117174027A (en) | 2023-09-25 | 2023-09-25 | Method and device for improving color cast of display panel, storage medium and display device |
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| CN202311245034.2A Pending CN117174027A (en) | 2023-09-25 | 2023-09-25 | Method and device for improving color cast of display panel, storage medium and display device |
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