CN108962135B - Aging compensation method and device for display panel - Google Patents

Aging compensation method and device for display panel Download PDF

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Publication number
CN108962135B
CN108962135B CN201811093003.9A CN201811093003A CN108962135B CN 108962135 B CN108962135 B CN 108962135B CN 201811093003 A CN201811093003 A CN 201811093003A CN 108962135 B CN108962135 B CN 108962135B
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aging
sub
display panel
pixel
degree
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CN108962135A (en
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王雨
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/04Maintaining the quality of display appearance
    • G09G2320/043Preventing or counteracting the effects of ageing
    • G09G2320/046Dealing with screen burn-in prevention or compensation of the effects thereof

Abstract

The invention discloses an aging compensation method and device of a display panel, and belongs to the technical field of display. The display panel includes a plurality of sub-pixels, the method includes: accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of the display panel; determining the current aging degree corresponding to the aging accumulated data of the display panel according to the first corresponding relation between the accumulated data and the aging degree; and carrying out aging compensation on the display panel according to the current aging degree. And determining the current aging degree of the display panel according to the acquired aging accumulated data of the display panel, and compensating the display panel according to the current aging degree, so that the luminous efficiency of the display panel is improved, and the display panel can keep good display effect at different aging stages.

Description

Aging compensation method and device for display panel
Technical Field
The invention belongs to the technical field of display, and particularly relates to an aging compensation method and device for a display panel.
Background
Organic Light Emitting Diode (OLED) display panels are widely used due to their characteristics of self-luminescence, low driving voltage, and fast response.
In the related art, an OLED device in an OLED display panel generally includes: an anode, a light-emitting layer and a cathode. Wherein, the light-emitting layer is made of organic semiconductor material and can emit light under the drive of the anode and the cathode.
However, as the service time of the OLED display panel increases, the organic semiconductor material of the light emitting layer in the OLED device may gradually age, resulting in poor display effect of the OLED display panel.
Disclosure of Invention
In order to solve the problems in the related art, the invention provides an aging compensation method and device for a display panel, which can solve the problem of poor display effect of the OLED display panel caused by gradual aging of an organic semiconductor material of a light emitting layer in an OLED device. The technical scheme is as follows:
in a first aspect, a method for compensating aging of a display panel, the display panel including a plurality of sub-pixels, the method comprising:
accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of the display panel;
determining the current aging degree corresponding to the aging accumulated data of the display panel according to the first corresponding relation between the accumulated data and the aging degree;
and carrying out aging compensation on the display panel according to the current aging degree.
Optionally, the accumulating the display data of each sub-pixel after the display panel is turned on for the first time to obtain the aging accumulated data of the display panel includes:
accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of each sub-pixel;
accumulating the aging accumulated data of the plurality of sub-pixels to obtain the aging accumulated data of the display panel;
optionally, the performing aging compensation on the display panel according to the current aging degree includes:
determining a target gamma voltage corresponding to the current aging degree;
adjusting the gamma voltage of the display panel to the target gamma voltage.
Optionally, the first corresponding relationship is a corresponding relationship between accumulated data of the display panel and an aging degree of the display panel; before the aging compensation is performed on the display panel according to the current aging degree, the method further comprises:
respectively determining the sub-pixel aging degree corresponding to the aging accumulated data of each sub-pixel according to the second corresponding relation between the accumulated data of the sub-pixels and the aging degree of the sub-pixels;
optionally, after adjusting the gamma voltage of the display panel to the target gamma voltage, the method further includes:
determining a sub-pixel with a sub-pixel aging degree different from the current aging degree as a difference sub-pixel in the plurality of sub-pixels;
determining a compensation coefficient of each difference sub-pixel according to the sub-pixel aging degree of each difference sub-pixel;
and compensating the display data of each difference sub-pixel by adopting the compensation coefficient of each difference sub-pixel.
Optionally, the determining a compensation coefficient of each difference sub-pixel according to the sub-pixel aging degree of each difference sub-pixel includes:
determining a reference gamma voltage corresponding to the sub-pixel aging degree of each differential sub-pixel;
and determining a compensation coefficient of each differential sub-pixel according to the target gamma voltage and a reference gamma voltage corresponding to the aging degree of the sub-pixel of each differential sub-pixel, wherein the compensation coefficient is positively correlated with the reference gamma voltage.
Optionally, the determining the target gamma voltage corresponding to the current aging degree includes:
determining a target gamma voltage corresponding to the current aging degree according to the corresponding relation between the aging degree and the gamma voltage;
and the gamma voltage corresponding to each aging degree is the gamma voltage of the display panel with the aging degree when the display panel displays the highest display brightness.
Optionally, the accumulating the display data of each sub-pixel after the display panel is turned on for the first time to obtain the aging accumulated data of the display panel includes:
accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of each sub-pixel;
the first corresponding relationship is a corresponding relationship between accumulated data of the sub-pixels and the aging degree of the sub-pixels, and the determining the current aging degree corresponding to the aged accumulated data of the display panel according to the first corresponding relationship between the accumulated data and the aging degree includes:
respectively determining the current aging degree corresponding to the aging accumulated data of each sub-pixel according to the first corresponding relation between the accumulated data and the aging degree;
optionally, the performing aging compensation on the display panel according to the current aging degree includes:
determining a compensation coefficient of each sub-pixel according to the current aging degree of each sub-pixel;
and compensating the display data of each sub-pixel by adopting the compensation coefficient of each sub-pixel.
In a second aspect, there is provided an aging compensation apparatus of a display panel including a plurality of sub-pixels, the apparatus comprising:
the accumulation module is used for accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain the aging accumulation data of the display panel;
the first determining module is used for determining the current aging degree corresponding to the aging accumulated data of the display panel according to the first corresponding relation between the accumulated data and the aging degree;
and the compensation module is used for carrying out aging compensation on the display panel according to the current aging degree.
Optionally, the accumulation module is configured to:
accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of each sub-pixel;
accumulating the aging accumulated data of the plurality of sub-pixels to obtain the aging accumulated data of the display panel;
optionally, the compensation module includes:
the determining submodule is used for determining a target gamma voltage corresponding to the current aging degree;
and the adjusting submodule is used for adjusting the gamma voltage of the display panel to the target gamma voltage.
The first corresponding relation is the corresponding relation between the accumulated data of the display panel and the aging degree of the display panel;
optionally, the apparatus further comprises:
a second determining module, configured to determine, before the compensation module performs aging compensation on the display panel according to the current aging degree, a sub-pixel aging degree corresponding to the aging accumulated data of each sub-pixel according to a second corresponding relationship between the accumulated data of the sub-pixels and the aging degree of the sub-pixels;
a third determining module, configured to determine, as a difference subpixel, a subpixel with a subpixel aging degree different from the current aging degree among the plurality of subpixels after the adjusting submodule adjusts the gamma voltage of the display panel to the target gamma voltage;
a fourth determining module, configured to determine a compensation coefficient of each difference sub-pixel according to a sub-pixel aging degree of each difference sub-pixel;
and the compensation module is used for compensating the display data of each difference sub-pixel by adopting the compensation coefficient of each difference sub-pixel.
Optionally, the fourth determining module is configured to:
determining a reference gamma voltage corresponding to the sub-pixel aging degree of each differential sub-pixel;
and determining a compensation coefficient of each differential sub-pixel according to the target gamma voltage and a reference gamma voltage corresponding to the aging degree of the sub-pixel of each differential sub-pixel, wherein the compensation coefficient is positively correlated with the reference gamma voltage.
Optionally, the determining sub-module is configured to:
determining a target gamma voltage corresponding to the current aging degree according to the corresponding relation between the aging degree and the gamma voltage;
and the gamma voltage corresponding to each aging degree is the gamma voltage of the display panel with the aging degree when the display panel displays the highest display brightness.
Optionally, the accumulation module is configured to:
accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of each sub-pixel;
the first corresponding relationship is a corresponding relationship between accumulated data of the sub-pixels and an aging degree of the sub-pixels, and optionally, the first determining module is configured to:
respectively determining the current aging degree corresponding to the aging accumulated data of each sub-pixel according to the first corresponding relation between the accumulated data and the aging degree;
optionally, the compensation module is configured to:
determining a compensation coefficient of each sub-pixel according to the current aging degree of each sub-pixel;
and compensating the display data of each sub-pixel by adopting the compensation coefficient of each sub-pixel.
In a third aspect, there is provided an aging compensation apparatus for a display panel, comprising: a processing component, a memory and a computer program stored on the memory and executable on the processing component, the processing component implementing the aging compensation method according to the first aspect when executing the computer program.
In a fourth aspect, there is provided a display device including: a display panel and an aging compensation apparatus as described in the second or third aspect.
In a fourth aspect, there is provided a computer-readable storage medium having instructions stored therein, which when run on a computer, cause the computer to perform the aging compensation method according to the first aspect.
The technical scheme provided by the invention has the beneficial effects that at least:
the aging compensation method and the aging compensation device for the display panel, provided by the embodiment of the invention, can determine the current aging degree of the display panel according to the acquired aging accumulated data of the display panel and compensate the display panel according to the current aging degree, so that the luminous efficiency of the display panel is improved, and the display panel can keep good display effect in different aging stages.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart illustrating a method for compensating aging of a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for compensating for aging of a display panel according to another embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for compensating for aging of a display panel according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an aging compensation apparatus for a display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a compensation module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another aging compensation apparatus for a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a flowchart of an aging compensation method for a display panel, which can be applied to an aging compensation apparatus for a display panel according to an embodiment of the present invention. The display panel may include a plurality of sub-pixels, and referring to fig. 1, the method may include:
step 101, accumulating the display data of each sub-pixel after the display panel is firstly turned on to obtain the aging accumulated data of the display panel.
The display data for each sub-pixel may be a gray scale value for the sub-pixel. The aging accumulated data of the display panel may include aging accumulated data of each of the plurality of sub-pixels. Alternatively, the aging accumulated data of the display panel may be aging accumulated data obtained by accumulating the aging accumulated data of the plurality of sub-pixels.
And 102, determining the current aging degree corresponding to the aging accumulated data of the display panel according to the first corresponding relation between the accumulated data and the aging degree.
The corresponding relationship may record the range of accumulated data corresponding to different aging degrees. The aging compensation device can determine the current aging degree according to the range of the aging accumulation data.
And 103, carrying out aging compensation on the display panel according to the current aging degree.
After the aging compensation device determines the current aging degree of the display panel, the aging compensation device can perform aging compensation on the display panel. For example, the display data for each sub-pixel may be compensated based on the current age. Alternatively, the gamma voltage of the display panel may be adjusted according to the current aging degree. Then, the aging compensation device may output the compensated display data or the display data with the adjusted gamma voltage to a driving Integrated Circuit (IC). The driving IC can drive the display panel to display images.
In summary, the aging compensation method for the display panel according to the embodiments of the present invention can determine the current aging degree of the display panel according to the obtained aging accumulated data of the display panel, and compensate the display panel according to the current aging degree, so that the light emitting efficiency of the display panel is improved, and the display panel can maintain a good display effect at different aging stages.
Fig. 2 is a flowchart of another aging compensation method for a display panel according to an embodiment of the present invention. The method can be applied to an aging compensation apparatus of a display panel including a plurality of sub-pixels. Referring to fig. 2, the method may include:
step 201, accumulating the display data of each sub-pixel after the display panel is turned on for the first time to obtain the aging accumulated data of each sub-pixel. Step 202 and step 206 are performed.
The display data for each sub-pixel may be a gray scale value for the sub-pixel. The aging compensation device can accumulate the display data of each frame of each sub-pixel after the display panel is started for the first time in real time to obtain the aging accumulated data of each sub-pixel.
For example, assume that the display panel includes M rows and N columns of sub-pixels, i.e., the display panel includes M × N sub-pixels. The aging compensation device accumulates the display data of each sub-pixel to obtain aging accumulated data of M × N sub-pixels. For example, assuming that the resolution of the display panel is 2560 × 1440, i.e., M is 2560 and N is 1440, the aging compensation apparatus can statistically obtain the aging accumulated data of 2560 × 1440 subpixels.
Step 202, accumulating the aging accumulated data of the plurality of sub-pixels to obtain the aging accumulated data of the display panel. Step 203 is performed.
Further, the aging compensation device may accumulate the aging accumulated data of all the sub-pixels of the display panel to obtain the aging accumulated data of the display panel. For example, the aging compensation device may accumulate the aging accumulated data of M × N sub-pixels to obtain the aging accumulated data of the display panel, which may also be referred to as the entire screen aging accumulated data of the display panel.
Step 203, determining the current aging degree corresponding to the aging accumulation data of the display panel according to the first corresponding relationship between the accumulation data and the aging degree. Step 204 is performed.
In the embodiment of the present invention, the first corresponding relationship between the accumulated data and the aging degree may be stored in the aging compensation apparatus in advance. The first corresponding relationship may record ranges of accumulated data corresponding to different aging degrees. The aging compensation device can determine the current aging degree of the display panel according to the range of the accumulated data in which the aging accumulated data of the display panel is positioned.
Before the aging compensation is performed on the display panel, the aging accumulated data of a plurality of display panel samples with different aging degrees can be detected to obtain the first corresponding relation. For example, for each display panel sample, the display data of each sub-pixel in the display panel sample after the display panel sample is turned on for the first time may be accumulated to obtain the aging accumulated data of the display panel sample. Then, a first corresponding relationship between the accumulated data and the aging degree can be generated according to the aging degree of each display panel sample and the aging accumulated data.
For example, the degree of aging corresponding to each range of accumulated data may be determined by testing at least one sample of the display panel for that degree of aging. For example, assume that the aging levels to be determined include a first aging level, a second aging level, and a third aging level. Then for a first aging level, k (k is a positive integer) display panel samples of the first aging level may be obtained first. And then, the aging accumulated data of each display panel sample can be detected respectively to obtain the variation range of the aging accumulated data of the k display panel samples, and the variation range can be determined as the range of the accumulated data corresponding to the first aging degree. The ranges of accumulated data corresponding to other aging degrees can be detected by the same method. The first correspondence of the resulting accumulated data to the degree of aging may be as shown in table 1.
TABLE 1
Range of accumulated data Degree of aging
(0,x1) First degree of aging
[x1,x2) Second degree of aging
[x2,+∞) Third degree of aging
The aging degrees of the first to third aging degrees in table 1 may be increased in order. The range of the accumulated data corresponding to the first aging degree is (0, x1), that is, when the aged accumulated data of the display panel is greater than 0 and less than x1, the aging degree of the display panel is the first aging degree. The range of the aging accumulated data in the second aging degree is [ x1, x2), that is, when the aging accumulated data of the display panel is greater than or equal to x1 and less than x2, the aging degree of the display panel is the second aging degree. The range of the aging accumulated data in the third aging degree is [ x2, + ∞), that is, when the aging accumulated data of the display panel is greater than or equal to x2, the aging degree of the display panel is the third aging degree. Wherein + ∞ in the accumulated data range corresponding to the third degree of aging is positive infinity.
Or, the second corresponding relationship between the sub-pixel accumulated data and the aging degree of the sub-pixel may be determined first, and then the first corresponding relationship may be obtained based on the second corresponding relationship. For example, it is assumed that the second correspondence relationship records a range of sub-pixel accumulated data corresponding to the aging degree of each sub-pixel. For each aging degree of the sub-pixels, the aging degree of the sub-pixels can be used as the aging degree of the display panel, and the upper limit and the lower limit of the range of the corresponding sub-pixel accumulated data are multiplied by the number of the sub-pixels included in the display panel respectively to obtain the range of the aging accumulated data corresponding to the aging degree of the display panel.
The degree of sub-pixel aging corresponding to the range of each sub-pixel accumulated data can be determined by detecting the display panel sample with the degree of aging. For example, assume that the sub-pixel aging level to be determined comprises a first aging level. For the first aging degree, the display data of each sub-pixel in the display panel sample with the first aging degree after the display panel sample is turned on for the first time may be accumulated to obtain the sub-pixel accumulated data of each sub-pixel in the display panel sample. And then, determining a second corresponding relation between the aging degree of the sub-pixel and the range of the sub-pixel accumulated data according to the aging degree of the display panel sample and the variation range of the sub-pixel accumulated data of the plurality of sub-pixels in the display panel sample. The ranges of the sub-pixel accumulated data corresponding to the aging degrees of other sub-pixels can be obtained by adopting the same method, and the second corresponding relation between the sub-pixel accumulated data and the aging degrees of the sub-pixels can be obtained. Then, the first corresponding relationship can be determined according to the second corresponding relationship and the total number of the sub-pixels included in the display panel sample.
Assuming that the total number of sub-pixels included in the display panel sample is M × N, and the range of the sub-pixel accumulated data corresponding to the sub-pixel aging degree of the first aging degree is (0, x3), the upper limit and the lower limit of the range are multiplied by M × N, respectively, to obtain the range of the aging accumulated data corresponding to the display panel aging degree of the first aging degree, which is (0, x1), where x1 is x3 × M × N. The ranges of the aging accumulated data corresponding to other aging degrees can be calculated by the same method, and are not described herein again.
For example, assume that the value of x1 is 1849502160000 and the value of x2 is 4235956560000 in the first correspondence shown in table 1. If the aging compensation device acquires the aging accumulated data of the display panel as 357456690000. Then, according to the first corresponding relationship shown in table 1, the current aging degree of the display panel is the second aging degree. Of course, the aging degrees divided in the first corresponding relationship may also be more detailed, for example, the aging degrees may be divided into 6 aging degrees or 7 aging degrees, which is not limited in the embodiment of the present invention.
It should be noted that, in the embodiment of the present invention, the aging compensation apparatus may perform the methods shown in steps 201 to 203 after each frame of display data is output, that is, the aging compensation apparatus may detect the current aging degree of the display panel every other frame. Alternatively, the aging compensation device may detect the current aging degree of the display panel every multiple frames.
And step 204, determining a target gamma voltage corresponding to the current aging degree.
In the embodiment of the invention, the aging compensation device may store a corresponding relationship between the aging degree and the gamma voltage in advance. After the aging compensation device determines the current aging degree of the display panel, the target gamma voltage corresponding to the current aging degree can be determined according to the corresponding relation. In the corresponding relationship between the aging degree and the gamma voltage, the magnitude of the gamma voltage is positively correlated with the aging degree, that is, the higher the aging degree of the display panel is (i.e., the more the aging is), the larger the corresponding gamma voltage is.
With the increase of the service time of the display panel, the aging degree of the display panel is more serious, and the originally set gamma voltage cannot make the aged display panel reach the highest display brightness, so the gamma voltage needs to be properly adjusted to ensure that the display panel can display the highest display brightness. The maximum display brightness L of the display panel is in a direct proportion relation with the gamma voltage V. I.e., the higher the gamma voltage V, the higher the maximum display luminance L.
In the embodiment of the invention, brightness adjustment and gamma voltage detection can be carried out on a plurality of display panel samples with different aging degrees, so as to obtain the corresponding relation between the aging degrees and the gamma voltages. For example, for a gamma voltage corresponding to a certain aging degree, a brightness test may be performed on the display panel sample with the aging degree, the display brightness of the display panel sample is adjusted to the highest display brightness by adjusting the gamma voltage of the display panel sample, and the gamma voltage of the display panel sample at the highest display brightness is detected, so as to obtain the gamma voltage corresponding to the aging degree. The gamma voltages corresponding to other aging degrees can be detected by the same method. The correspondence of the finally generated aging degree to the gamma voltage can be as shown in table 2.
TABLE 2
Degree of aging Gamma voltage (V)
First degree of aging 10
Second degree of aging 10.5
Third degree of aging 11
Referring to table 2, it can be seen that the required gamma voltage is 10V when the display panel is in the first aging degree, 10.5V when the display panel is in the second aging degree, and 11V when the display panel is in the third aging degree.
For example, assuming that the current aging degree of the display panel is the second aging degree, it can be determined by referring to the correspondence relationship shown in table 2 that the target gamma voltage corresponding to the second aging degree is 10.5V.
Step 205, adjusting the gamma voltage of the display panel to a target gamma voltage.
In the embodiment of the invention, the gamma voltage of the display panel is adjusted to the target gamma voltage, so that the display panel can reach the highest display brightness under the driving of the target gamma voltage, and the display effect of the display panel is ensured.
For example, assuming that the preset gamma voltage of the display panel is 11V, the current aging degree of the display panel is a second aging degree, and the target gamma voltage corresponding to the second aging degree is 10.5V, the aging compensation device may adjust the gamma voltage of the display panel to 10.5V.
Optionally, if the target gamma voltage determined by the aging compensation device is the same as the preset gamma voltage of the display panel, that is, the current aging degree of the display panel is the same as the aging degree of the display panel detected last time, the gamma voltage of the display panel may not need to be adjusted.
And step 206, respectively determining the aging degree of the sub-pixel corresponding to the aging accumulation data of each sub-pixel according to the second corresponding relation between the aging degrees of the sub-pixel and the sub-pixel.
In the embodiment of the present invention, the aging compensation apparatus may further store a second corresponding relationship between the sub-pixel accumulated data and the aging degree of the sub-pixel. The second correspondence may record a range of accumulated data of the sub-pixels corresponding to different aging degrees. The aging compensation device can determine the aging degree of the sub-pixel of each sub-pixel according to the range of the aging accumulation data of the sub-pixel.
The process of generating the second corresponding relationship may refer to the related description in step 203, and is not described herein again.
For example, the second correspondence relationship between the accumulated sub-pixel data and the aging degree of the sub-pixel can be shown in table 3. When the range of the sub-pixel accumulated data is (0, x3), the aging degree of the corresponding sub-pixel is the first aging degree. The aging degree of the corresponding sub-pixel is the second aging degree when the range of the sub-pixel accumulated data is [ x3, x 4). The sub-pixel aging level corresponding to the sub-pixel accumulated data range of [ x4, + ∞) is the third aging level.
TABLE 3
Sub-pixel accumulated data Degree of aging of sub-pixel
(0,x3) First degree of aging
[x3,x4) Second degree of aging
[x4,+∞) Third degree of aging
For example, assume that the value of x3 is 501710 and the value of x4 is 1149077 in the correspondence shown in table 3. If the accumulated sub-pixel data of a sub-pixel in the display panel acquired by the aging compensation device is 694233. Then, according to the second corresponding relationship shown in the above table 3, the sub-pixel aging degree of the sub-pixel is the second aging degree.
And step 207, determining the sub-pixels with the sub-pixel aging degrees different from the current aging degree as difference sub-pixels.
In the embodiment of the present invention, the aging compensation apparatus may sequentially detect whether the sub-pixel aging degree of each sub-pixel is the same as the current aging degree of the display panel, and may determine the sub-pixel having the sub-pixel aging degree different from the current aging degree as the difference sub-pixel.
For example, assuming that the aging degree of the display panel determined according to the first corresponding relationship shown in table 1 is the second aging degree, and the aging degrees of the sub-pixels of Y sub-pixels determined according to the second corresponding relationship shown in table 3 are all the first aging degrees, the aging compensation apparatus may determine the Y sub-pixels as the difference sub-pixels. Wherein Y is a positive integer not greater than M × N.
And step 208, determining a compensation coefficient of each difference sub-pixel according to the sub-pixel aging degree of each difference sub-pixel.
In step 204, the aging compensation device adjusts the gamma voltage of the display panel according to the aging degree determined by the display panel. That is, the same gamma voltage is applied to all the sub-pixels in the display panel for adjustment. However, since the sub-pixel of the differential sub-pixel is not aged as much as the current aging of the display panel, the differential sub-pixel cannot be completely compensated using the same gamma voltage. Therefore, the display data of the difference sub-pixel needs to be compensated again according to the compensation coefficient for the difference sub-pixel, so that the display brightness of the compensated difference sub-pixel can reach the highest display brightness.
When the display panel is a-bit (bit), the display panel can represent 2aA brightness level, i.e. the display panel can display 2aA gray scale. Gray scale G and display brightness L of sub-pixels in display panelGCan satisfy the following conditions:
wherein L is 2aThe display brightness of the gray scale (i.e. the highest display brightness of the display panel) is gamma of the display panel, and the value is generally 2.2.
In the embodiment of the present invention, since the aging degree of the sub-pixels of the differential sub-pixels is not consistent with the aging degree of the display panel, after the gamma voltage of the display panel is adjusted to the target gamma voltage, the display brightness of the differential sub-pixels is not consistent with the display brightness of other non-differential sub-pixels, and the display data G of the differential sub-pixels needs to be compensated to keep the display brightness consistent with the display brightness of the non-differential sub-pixels.
If the display luminance of the display panel (i.e., the display luminance of the non-differential sub-pixels) is L', the display luminance of the compensated differential sub-pixels is L ". In order to make the display luminance L ″ of the difference sub-pixel coincide with the display luminance L 'of the non-difference sub-pixel, it can be known from the above formula (1) that the display data G of the difference sub-pixel and the compensated display data G' should satisfy:
wherein L is1Is the highest display brightness, L, of the non-differential sub-pixels2When the gamma voltage of the display panel is adjusted to the reference gamma voltage, the reference gamma voltage is the gamma voltage corresponding to the aging degree of the sub-pixels of the differential sub-pixels. It can be obtained from the above equation (2) that the compensation coefficient k of the difference sub-pixel satisfies:
wherein the content of the first and second substances,is referred to as L2And L1The ratio of (d) is given by the power of gamma. Since the maximum display luminance L of each sub-pixel in the display panel is proportional to the square of the gamma voltage V, it can be further determined that the compensation coefficient k of the difference sub-pixel satisfies the following equation (3):
V1is a target gamma voltage of the display panel, V2The reference gamma voltage is corresponding to the aging degree of the sub-pixel of the different sub-pixel.
In the embodiment of the invention, for each differential sub-pixel, the aging compensation device may determine the reference gamma voltage corresponding to the aging degree of the sub-pixel of each differential sub-pixel according to the corresponding relationship between the aging degree and the gamma voltage. Further, the compensation coefficient of each differential sub-pixel can be determined according to the target gamma voltage and the reference gamma voltage corresponding to the aging degree of the sub-pixel of each differential sub-pixel according to the above formula (4).
For example, it is assumed that the aging degree of a certain difference sub-pixel determined by the aging compensation apparatus is a first aging degree, and the aging degree of the display panel is a second aging degree. Target gamma voltage V of display panel110.5V, the reference gamma voltage V corresponding to the aging degree of the sub-pixel2Is 10V. Then, referring to the above equation (4), a compensation coefficient can be obtained:
and 209, compensating the display data of each difference sub-pixel by adopting the compensation coefficient of each difference sub-pixel.
The aging compensation device can compensate the display data G of the corresponding difference sub-pixel through the calculated compensation coefficient k of each difference sub-pixel, and the compensated display data G' meets the following requirements:
g' ═ G × k formula (5)
For example, for the difference sub-pixel of the first aging degree, assuming that the gray-scale value G is 1023, the aging compensation apparatus may compensate the gray-scale value G by using a compensation coefficient k of 0.9566, and the compensated gray-scale value G' satisfies: g' 1023 × 0.9566 ≈ 978. That is, the display luminance of the difference sub-pixel at the first aging level at the 978 gray level is the same as the display luminance of the non-difference sub-pixel at the gray level of 1023.
It should be noted that, the sequence of the steps of the aging compensation method for a display panel according to the embodiment of the present invention may be appropriately adjusted, and the steps may also be increased or decreased according to the situation, for example, the steps 206 to 209 may be deleted according to the situation, that is, the aging compensation device may determine the aging degree by using the aging accumulated data of the display panel, and perform compensation by using the gamma voltage determined by the aging degree. Or step 206 may be performed before step 202. Any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure is covered by the protection scope of the present disclosure, and thus, the detailed description thereof is omitted.
In summary, the aging compensation method for the display panel according to the embodiments of the present invention can determine the current aging degree of the display panel according to the obtained aging accumulated data of the display panel, and compensate the display panel according to the current aging degree, so that the light emitting efficiency of the display panel is improved, and the display panel can maintain a good display effect at different aging stages. In addition, the method provided by the embodiment of the invention can also determine the different sub-pixels with different aging degrees from the display panel, and compensate the display data of the different sub-pixels by adopting the compensation coefficient, thereby ensuring the uniformity of the display brightness of the display panel. The embodiment of the invention is generally suitable for the condition that most of the sub-pixels in the display panel are in the same aging degree, namely suitable for the display panel with better display brightness uniformity.
Fig. 3 is a flowchart of a method for compensating aging of a display panel according to another embodiment of the present invention. As shown in fig. 3, the method includes:
step 301, accumulating the display data of each sub-pixel after the display panel is turned on for the first time to obtain the aging accumulated data of each sub-pixel.
The display data for each sub-pixel may be a gray scale value for the sub-pixel. The aging compensation device can accumulate the display data of each frame of each sub-pixel after the display panel is started for the first time in real time to obtain the aging accumulated data of each sub-pixel.
Suppose that the display panel comprises M rows and N columns of sub-pixels, i.e. the display panel comprises M × N sub-pixels. The aging compensation apparatus accumulates the display data of each sub-pixel to obtain M × N aging accumulated data. For example, assuming that the resolution of the display panel is 2560 × 1440, i.e., M is 2560 and N is 1440, the aging compensation apparatus can statistically obtain the aging accumulated data of 2560 × 1440 subpixels.
Step 302, respectively determining the current aging degree corresponding to the aging accumulated data of each sub-pixel according to the first corresponding relationship between the accumulated data of the sub-pixels and the aging degree of the sub-pixels.
In the embodiment of the present invention, the aging compensation apparatus may store a first corresponding relationship between the sub-pixel accumulated data and the aging degree of the sub-pixel. The first corresponding relationship may record a range of accumulated data of the sub-pixels corresponding to different aging degrees. The aging compensation device can determine the current aging degree of the sub-pixel according to the range of the sub-pixel accumulated data of the sub-pixel.
Optionally, before performing aging compensation on each sub-pixel in the display panel, the first corresponding relationship may be obtained by detecting sub-pixel accumulated data of each sub-pixel in a plurality of display panel samples with different aging degrees. For example, for a display panel sample with a certain aging degree, the display data of each sub-pixel in the display panel sample after the display panel sample is turned on for the first time may be accumulated to obtain the sub-pixel accumulated data of each sub-pixel in the display panel sample. Then, a first corresponding relationship between the aging degree and the range of the sub-pixel accumulated data can be determined according to the aging degree of the display panel sample and the variation range of the sub-pixel accumulated data of each sub-pixel in the display panel sample.
For example, the aging degree of the sub-pixel corresponding to the range of the accumulated data of each sub-pixel can be determined by detecting at least one display panel sample with the aging degree. For example, assume that the age level to be determined includes a first age level. For the first aging degree, a display panel sample of the first aging degree may be obtained first, and the sub-pixel accumulated data of each sub-pixel in the display panel sample is detected to obtain a variation range of the sub-pixel aged accumulated data of each sub-pixel in the display panel sample, and then the variation range may be determined as the range of the sub-pixel accumulated data corresponding to the first aging degree. The ranges of the sub-pixel accumulated data corresponding to other aging degrees can be detected by adopting the same method. The first correspondence of the resulting subpixel accumulation data to the degree of aging of the subpixels may be as shown in table 4.
TABLE 4
Range of sub-pixel accumulated data Aging degree of sub-pixel
(0,z1) First degree of aging
[z1,z2) Second degree of aging
[z2,+∞) Third degree of aging
The aging degrees of the first to third aging degrees in table 4 were increased in order. The aging degree corresponding to the range of the sub-pixel accumulated data being (0, z1) is the first aging degree. The corresponding aging level is the second aging level when the range of the sub-pixel accumulated data is [ z1, z2 ]. The corresponding aging level for a range of [ z3, + ∞) of the subpixel accumulation data is the third aging level.
For example, assume that z1 takes a value of 501710 and z2 takes a value of 1149077 in the first correspondence shown in table 4. If the sub-pixel accumulated data of a certain sub-pixel acquired by the aging compensation device is 2150123. The aging compensating means may determine the current aging degree of the sub-pixel as the third aging degree according to the first correspondence shown in table 4 above. Of course, the aging degrees of the sub-pixels divided in the first corresponding relationship may also be more detailed, for example, the sub-pixels may be divided into 6 aging degrees or 7 aging degrees, which is not limited in the embodiment of the present invention.
It should be noted that, in the embodiment of the present invention, the aging compensation apparatus may perform the methods shown in steps 301 and 302 after each frame of display data is output, that is, the aging compensation apparatus may detect the current aging degree of each sub-pixel every other frame. Alternatively, the aging compensation device may detect the current aging degree of each sub-pixel every multiple frames.
Step 303, determining a compensation coefficient of each sub-pixel according to the current aging degree of each sub-pixel.
As the usage time of the display panel increases, the luminous efficiency of each sub-pixel in the display panel decreases, the display brightness decreases accordingly, and the display brightness of each sub-pixel may be different. Therefore, each sub-pixel needs to be compensated according to the compensation coefficient, so that the display brightness of each compensated sub-pixel is kept consistent, and the uniformity of the display brightness of the display panel is improved. Since the aging degree of each sub-pixel in the display panel may be inconsistent, different compensation coefficients are required to compensate for the sub-pixels with different aging degrees.
In determining the compensation coefficient of each sub-pixel, the gamma voltage V corresponding to the current aging degree of the sub-pixel can be determined2And then can be based on the gamma voltage V2Current gamma voltage V of display panel1The compensation coefficient k of the sub-pixel is determined by referring to the above formula (4).
As an example, assume that the aging compensation device detects the current gamma voltage V of the display panel1At 11V, the current aging level of a certain sub-pixel is the second aging level. The gamma voltage V corresponding to the second aging degree can be determined according to the corresponding relationship shown in table 22Is 10.5V. Then the compensation coefficient k of the sub-pixel can be calculated according to the above equation (4) as:
the compensation coefficients corresponding to the sub-pixels with other aging degrees can be obtained by adopting the same method. The correspondence between the aging degree of the resulting sub-pixel and the compensation coefficient can be shown in table 5.
TABLE 5
Degree of aging Compensation factor k
First degree of aging 0.9170
Second degree of aging 0.9586
Third degree of aging 1
Referring to table 5, it can be seen that when the current aging degree of a certain sub-pixel is the first aging degree, the compensation coefficient k is 0.9170. When the current aging degree of a certain sub-pixel is the second aging degree, the compensation coefficient k is 0.9586. When the current aging degree of a certain sub-pixel is the third aging degree, the compensation coefficient k is 1.
In the embodiment of the present invention, the aging compensation apparatus may generate the corresponding relationship between the aging degree of the sub-pixel and the compensation coefficient in advance before compensating the display panel. In the actual aging compensation process, the compensation coefficients of the sub-pixels with different aging degrees can be directly determined according to the corresponding relation. Or, the aging compensation device can also calculate the compensation coefficient of each sub-pixel according to the current aging degree of each sub-pixel when compensating the display panel.
Optionally, if the aging compensation device determines that the compensation coefficient of a certain sub-pixel is 1, that is, the current aging degree of the sub-pixel is the same as the aging degree of the sub-pixel detected last time, the display data of the sub-pixel does not need to be compensated.
And step 304, compensating the display data of each sub-pixel by adopting the compensation coefficient of each sub-pixel.
After determining the compensation coefficient for each sub-pixel, the compensated display data for the sub-pixel may be determined with reference to equation (5) above based on the proportional relationship between the compensation coefficient k and the display data before and after compensation for the sub-pixel.
For example, for the sub-pixel with the second aging degree, assuming that the gray-scale value G is 800, the aging compensation apparatus may compensate the gray-scale value G by using the compensation coefficient k of 0.9586, and the compensated gray scale G' satisfies: g' 800 × 0.9586 ≈ 767. Therefore, the display brightness of the sub-pixel at the second aging degree at the 767 gray scale is the same as the display brightness of the sub-pixel without compensation at the 800 gray scale value.
It should be further noted that, the order of the steps of the aging compensation method for a display panel provided in the embodiment of the present invention may be appropriately adjusted, and the steps may also be increased or decreased according to the situation. Any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure is covered by the protection scope of the present disclosure, and thus, the detailed description thereof is omitted.
In summary, the aging compensation method for the display panel according to the embodiments of the present invention may determine the current aging degree of the sub-pixel according to the sub-pixel accumulated data of the sub-pixel, and compensate each sub-pixel by using different compensation coefficients according to the aging degree of the sub-pixel of each sub-pixel. The method provided by the embodiment of the invention ensures that the compensation degrees of the sub-pixels are different when the aging degrees of the sub-pixels are different, thereby not only improving the luminous efficiency of the display panel, but also ensuring the uniformity of the display brightness of the display panel. The embodiment of the invention is generally suitable for the condition that the aging degree of the sub-pixels in the display panel is more dispersed, namely suitable for the display panel with poorer display brightness uniformity.
An embodiment of the present invention further provides an aging compensation apparatus for a display panel, where the display panel includes a plurality of sub-pixels, and as shown in fig. 4, the apparatus may include:
the accumulation module 401 is configured to accumulate the display data of each sub-pixel after the display panel is turned on for the first time, so as to obtain the aging accumulation data of the display panel.
The first determining module 402 is configured to determine a current aging degree corresponding to the aging accumulated data of the display panel according to the first corresponding relationship between the accumulated data and the aging degree.
A compensation module 403, configured to perform aging compensation on the display panel according to the current aging degree.
Optionally, the accumulation module 401 may be configured to:
and accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain the aging accumulated data of each sub-pixel.
And accumulating the aging accumulated data of the plurality of sub-pixels to obtain the aging accumulated data of the display panel.
Fig. 5 is a schematic structural diagram of a compensation module according to an embodiment of the present invention, and as shown in fig. 5, the compensation module 403 may include:
the determining sub-module 4031 is used to determine a target gamma voltage corresponding to the current aging degree.
An adjusting submodule 4032 for adjusting the gamma voltage of the display panel to the target gamma voltage.
Optionally, the first corresponding relationship is a corresponding relationship between accumulated data of the display panel and an aging degree of the display panel. As shown in fig. 6, the apparatus may further include:
a second determining module 404, configured to determine, before the compensating module 403 performs aging compensation on the display panel according to the current aging degree, a sub-pixel aging degree corresponding to the aging accumulated data of each sub-pixel according to a second corresponding relationship between the accumulated data of the sub-pixels and the aging degree of the sub-pixels.
A third determining module 405, configured to determine, as a difference sub-pixel, a sub-pixel of the plurality of sub-pixels, which has a different aging degree from the current aging degree, after the adjusting sub-module 4032 adjusts the gamma voltage of the display panel to the target gamma voltage.
A fourth determining module 406, configured to determine a compensation coefficient for each difference sub-pixel according to the sub-pixel aging degree of each difference sub-pixel.
The compensation module 403 is further configured to compensate the display data of each difference sub-pixel by using the compensation coefficient of each difference sub-pixel after the adjustment sub-module 4032 adjusts the gamma voltage of the display panel to the target gamma voltage.
Optionally, the fourth determining module 406 may be configured to:
determining a reference gamma voltage corresponding to the sub-pixel aging degree of each differential sub-pixel;
and determining a compensation coefficient of each differential sub-pixel according to the target gamma voltage and a reference gamma voltage corresponding to the aging degree of the sub-pixel of each differential sub-pixel, wherein the compensation coefficient is positively correlated with the reference gamma voltage.
Optionally, the determination sub-module 4032 may be configured to:
and determining the target gamma voltage corresponding to the current aging degree according to the corresponding relation between the aging degree and the gamma voltage.
The gamma voltage corresponding to each aging degree is the gamma voltage of the display panel with the aging degree when the display panel displays the highest display brightness.
Optionally, the accumulation module 401 may further be configured to:
and accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain the aging accumulated data of each sub-pixel.
The first correspondence is a correspondence between accumulated data of the sub-pixels and aging degrees of the sub-pixels, and the first determining module 402 is configured to:
and respectively determining the current aging degree corresponding to the aging accumulated data of each sub-pixel according to the first corresponding relation between the accumulated data and the aging degree.
Optionally, the compensation module 403 may be configured to:
and determining the compensation coefficient of each sub-pixel according to the current aging degree of each sub-pixel.
And compensating the display data of each sub-pixel by adopting the compensation coefficient of each sub-pixel.
In summary, the aging compensation apparatus for a display panel according to the embodiments of the present invention can obtain the aging accumulated data of the display panel through the accumulation module, determine the current aging degree corresponding to the aging accumulated data of the display panel through the first determination module, and compensate the display panel by using the compensation module according to the current aging degree, so that the light emitting efficiency of the display panel is improved, and the display panel can maintain a good display effect at different aging stages.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses, modules and sub-modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The embodiment of the invention also provides another aging compensation device of a display panel, which can comprise: the display panel aging compensation method comprises a processing component, a memory and a computer program which is stored on the memory and can run on the processing component, wherein the processing component can be a processing circuit or a processing unit, and the aging compensation method of the display panel provided by the method embodiment can be realized when the processing component executes the computer program.
In the embodiment of the present invention, the aging compensation device may be a control chip independently integrated in the display device, or may be integrated on a System On Chip (SOC) or a display card of the display device; still alternatively, the aging compensation device may be a Timing Controller (TCON) or a Micro Control Unit (MCU) integrated in the TCON.
An embodiment of the present invention further provides a display device, where the display device may include: a display panel and an aging compensation device as described above. The display device may be: the display device comprises any product or component with a display function, such as a liquid crystal panel, electronic paper, an OLED panel, an AMOLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
The present invention also provides a computer-readable storage medium having stored therein instructions that, when run on a computer, cause the computer to perform the aging compensation method as described above.
The invention is not to be considered as limited to the particular embodiments shown and described, but is to be understood that various modifications, equivalents, improvements and the like can be made without departing from the spirit and scope of the invention.

Claims (8)

1. A method for compensating for aging of a display panel, the display panel comprising a plurality of sub-pixels, the method comprising:
accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of the display panel;
determining the current aging degree corresponding to the aging accumulated data of the display panel according to the first corresponding relation between the accumulated data and the aging degree;
carrying out aging compensation on the display panel according to the current aging degree;
the accumulating the display data of each sub-pixel after the display panel is firstly turned on to obtain the aging accumulated data of the display panel includes:
accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of each sub-pixel;
accumulating the aging accumulated data of the plurality of sub-pixels to obtain the aging accumulated data of the display panel;
the aging compensation of the display panel according to the current aging degree comprises the following steps:
determining a target gamma voltage corresponding to the current aging degree;
adjusting a gamma voltage of the display panel to the target gamma voltage;
the first corresponding relation is the corresponding relation between the accumulated data of the display panel and the aging degree of the display panel; before the aging compensation is performed on the display panel according to the current aging degree, the method further comprises:
respectively determining the sub-pixel aging degree corresponding to the aging accumulated data of each sub-pixel according to the second corresponding relation between the accumulated data of the sub-pixels and the aging degree of the sub-pixels;
after adjusting the gamma voltage of the display panel to the target gamma voltage, the method further includes:
determining a sub-pixel with a sub-pixel aging degree different from the current aging degree as a difference sub-pixel in the plurality of sub-pixels;
determining a compensation coefficient of each difference sub-pixel according to the sub-pixel aging degree of each difference sub-pixel;
and compensating the display data of each difference sub-pixel by adopting the compensation coefficient of each difference sub-pixel.
2. The method of claim 1, wherein determining the compensation factor for each of the difference sub-pixels based on sub-pixel aging for each of the difference sub-pixels comprises:
determining a reference gamma voltage corresponding to the sub-pixel aging degree of each differential sub-pixel;
and determining a compensation coefficient of each differential sub-pixel according to the target gamma voltage and a reference gamma voltage corresponding to the aging degree of the sub-pixel of each differential sub-pixel, wherein the compensation coefficient is positively correlated with the reference gamma voltage.
3. The method of claim 1, wherein determining the target gamma voltage for the current aging level comprises:
determining a target gamma voltage corresponding to the current aging degree according to the corresponding relation between the aging degree and the gamma voltage;
and the gamma voltage corresponding to each aging degree is the gamma voltage of the display panel with the aging degree when the display panel displays the highest display brightness.
4. An aging compensation apparatus of a display panel, the display panel including a plurality of sub-pixels, the apparatus comprising:
the accumulation module is used for accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain the aging accumulation data of the display panel;
the first determining module is used for determining the current aging degree corresponding to the aging accumulated data of the display panel according to the first corresponding relation between the accumulated data and the aging degree;
the compensation module is used for carrying out aging compensation on the display panel according to the current aging degree;
the accumulation module is configured to:
accumulating the display data of each sub-pixel after the display panel is started for the first time to obtain aging accumulated data of each sub-pixel;
accumulating the aging accumulated data of the plurality of sub-pixels to obtain the aging accumulated data of the display panel;
the compensation module comprises:
the determining submodule is used for determining a target gamma voltage corresponding to the current aging degree;
an adjusting submodule for adjusting a gamma voltage of the display panel to the target gamma voltage;
the first corresponding relation is the corresponding relation between the accumulated data of the display panel and the aging degree of the display panel;
the device further comprises:
a second determining module, configured to determine, before the compensation module performs aging compensation on the display panel according to the current aging degree, a sub-pixel aging degree corresponding to the aging accumulated data of each sub-pixel according to a second corresponding relationship between the accumulated data of the sub-pixels and the aging degree of the sub-pixels;
a third determining module, configured to determine, as a difference subpixel, a subpixel with a subpixel aging degree different from the current aging degree among the plurality of subpixels after the adjusting submodule adjusts the gamma voltage of the display panel to the target gamma voltage;
a fourth determining module, configured to determine a compensation coefficient of each difference sub-pixel according to a sub-pixel aging degree of each difference sub-pixel;
and the compensation module is used for compensating the display data of each difference sub-pixel by adopting the compensation coefficient of each difference sub-pixel.
5. The aging compensation apparatus of claim 4, wherein the fourth determination module is configured to:
determining a reference gamma voltage corresponding to the sub-pixel aging degree of each differential sub-pixel;
and determining a compensation coefficient of each differential sub-pixel according to the target gamma voltage and a reference gamma voltage corresponding to the aging degree of the sub-pixel of each differential sub-pixel, wherein the compensation coefficient is positively correlated with the reference gamma voltage.
6. The aging compensation apparatus of claim 4, wherein the determination submodule is configured to:
determining a target gamma voltage corresponding to the current aging degree according to the corresponding relation between the aging degree and the gamma voltage;
and the gamma voltage corresponding to each aging degree is the gamma voltage of the display panel with the aging degree when the display panel displays the highest display brightness.
7. A display device, characterized in that the display device comprises: a display panel and an aging compensating apparatus as claimed in any one of claims 4 to 6.
8. A computer-readable storage medium having stored therein instructions which, when run on a computer, cause the computer to execute the aging compensation method according to any one of claims 1 to 3.
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