CN111754935A - Display panel compensation method and device and display device - Google Patents
Display panel compensation method and device and display device Download PDFInfo
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- CN111754935A CN111754935A CN202010610802.XA CN202010610802A CN111754935A CN 111754935 A CN111754935 A CN 111754935A CN 202010610802 A CN202010610802 A CN 202010610802A CN 111754935 A CN111754935 A CN 111754935A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control 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
- G09G3/22—Control 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
- G09G3/30—Control 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
- G09G3/32—Control 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]
- G09G3/3208—Control 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]
- G09G3/3225—Control 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] using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0257—Reduction of after-image effects
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Abstract
The embodiment of the invention discloses a compensation method and device of a display panel and a display device. The compensation method of the display panel comprises the following steps: acquiring accumulated display time of each sub-pixel unit of a display panel and a display gray scale corresponding to each display time interval in the accumulated display time; calculating the normalized display gray scale of each sub-pixel unit according to the display gray scale of each display time interval and the accumulated display time; determining the current brightness deviation of each sub-pixel unit according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, brightness and time; and compensating the display driving signal of the sub-pixel unit according to the current brightness deviation. The scheme of the embodiment of the invention improves the problem of image retention of the display panel.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a compensation method and device for a display panel, and a display device.
Background
An Organic Light Emitting Diode (OLED) display panel is a self-luminous display panel, and the OLED display panel is increasingly used in various high-performance display fields due to its advantages of lightness, thinness, high brightness, wide viewing angle, high response speed, and wide temperature range.
The problem that the residual image is easy to appear in the display process of the OLED display panel is a research and development subject which is concerned by the display panel industry for a long time.
Disclosure of Invention
The invention provides a compensation method and device of a display panel and a display device, which aim to solve the problem of image retention of the display panel.
In a first aspect, an embodiment of the present invention provides a compensation method for a display panel, including:
acquiring accumulated display time of each sub-pixel unit of a display panel and a display gray scale corresponding to each display time interval in the accumulated display time;
calculating the normalized display gray scale of each sub-pixel unit according to the display gray scale of each display time interval and the accumulated display time;
determining the current brightness deviation of each sub-pixel unit according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, brightness and time;
and compensating the display driving signal of the sub-pixel unit according to the current brightness deviation.
Optionally, calculating a normalized display gray scale of each sub-pixel unit according to the display gray scale of each display period and the accumulated display time includes:
weighting and summing the display gray scales of all the display periods to obtain an accumulated display gray scale;
and taking the quotient of the accumulated display gray scale and the accumulated display time as a normalized display gray scale.
Optionally, the weight value of each display gray scale is determined according to the duration of the display time period corresponding to the display gray scale.
Optionally, determining the current luminance deviation of each sub-pixel according to the normalized display gray scale, the accumulated display time, and a pre-stored correspondence relationship between gray scale, luminance, and time includes:
pre-storing the corresponding relation between the brightness and time of a plurality of set gray scales;
and determining the current brightness deviation corresponding to the normalized display gray scale and the accumulated display time according to the corresponding relation between the brightness of the set gray scale and the time.
Optionally, determining a current luminance deviation corresponding to the normalized display gray scale and the accumulated display time according to the correspondence between the luminance of the set gray scale and the time includes:
and determining the current brightness deviation corresponding to the normalized display gray scale and the accumulated display time by adopting an interpolation algorithm according to the corresponding relation between the brightness of the set gray scale and the time.
Optionally, compensating the display driving signal of the sub-pixel unit according to the current luminance deviation includes:
and when the current brightness deviation is larger than a set deviation threshold value, compensating the display driving signal of the sub-pixel unit.
Optionally, the set deviation threshold is greater than or equal to 2%.
In a second aspect, an embodiment of the present invention further provides a compensation apparatus for a display panel, including:
the data acquisition module is used for acquiring the accumulated display time of each sub-pixel unit of the display panel and the display gray scale corresponding to each display time interval in the accumulated display time;
the normalization calculation module is used for calculating the normalization display gray scale of each sub-pixel unit according to the display gray scale of each display time interval and the accumulated display time;
the brightness deviation determining module is used for determining the current brightness deviation of each sub-pixel unit according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, the pre-stored brightness and the pre-stored time;
and the compensation module is used for compensating the display driving signals of the sub-pixel units according to the current brightness deviation.
Optionally, the normalization calculation module includes:
the accumulative display gray scale determining unit is used for weighting and summing the display gray scales of all display periods to obtain an accumulative display gray scale;
and the normalization calculation unit is used for taking the quotient of the accumulated display gray scale and the accumulated display time as a normalization display gray scale.
In a third aspect, an embodiment of the present invention further provides a display device, including a display panel and the compensation device for a display panel according to any embodiment of the present invention.
The embodiment of the invention calculates the normalized display gray scale of each sub-pixel unit through the display gray scale and the accumulated display time of each display time interval, determines the current brightness deviation of each sub-pixel unit according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, brightness and time, and compensates the display driving signals of the sub-pixel units according to the current brightness deviation. The normalized display gray scale represents the average level of the accumulated current of the sub-pixel unit in the accumulated display time, the accumulated display time represents the current accumulation time of the sub-pixel unit, the brightness deviation caused by long-time display of the sub-pixel unit can be reflected well by the current brightness deviation determined according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, the brightness and the time, the display deviation caused by current accumulation can be compensated well by compensating the sub-pixel unit according to the current brightness deviation, the display brightness of each sub-pixel unit meets the display requirement, and accordingly residual images caused by overlarge display differences of different sub-pixel units are avoided.
Drawings
Fig. 1 is a flowchart illustrating a compensation method for a display panel according to an embodiment of the present invention;
FIG. 2 is a curve showing the relationship between gray scale, brightness and time according to the present embodiment;
FIG. 3 is a schematic diagram of a compensation apparatus for a display panel according to this embodiment;
fig. 4 is a schematic diagram of a display device provided in this embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, the conventional display panel is prone to image sticking, and the inventor finds out through research that the reason why the problem occurs is that as the lighting time of the OLED display panel increases, brightness deviation occurs due to the current accumulation effect, so that display difference exists between different sub-pixel units, and image sticking is prone to occur when the display difference is too large.
Based on the above problem, the present embodiment provides a compensation method for a display panel, and fig. 1 is a flowchart of the compensation method for a display panel provided in the present embodiment, and with reference to fig. 1, the method includes:
The display panel comprises a plurality of sub-pixel units, and the sub-pixel units are used for displaying pictures. Each sub-pixel unit comprises a pixel driving circuit and an organic light-emitting structure, and the pixel driving circuit receives a display driving signal and drives the organic light-emitting structure to emit light. The cumulative display time of each sub-pixel unit is the total display time of each sub-pixel unit from the initial lighting time to the current time. The display gray scale of each display period within the accumulated display time includes all display gray scales from the initial lighting time of the sub-pixel unit. The display gray scales in each display period are the same, and the display gray scales in different display periods can be the same or different.
And step 120, calculating the normalized display gray scale of each sub-pixel unit according to the display gray scale of each display period and the accumulated display time.
The normalized display gray scale represents the average level of the accumulated current of the sub-pixel unit in the accumulated display time, the accumulated display time represents the current accumulation time of the sub-pixel unit, and the variation degrees of the display brightness of the sub-pixel units with different normalized display gray scales along with the increase of the accumulated display time are different.
Specifically, the normalized display gray scale may be determined by obtaining an average value of all display gray scales within the accumulated display time, or may be determined by giving a certain weight value to each display gray scale according to a duration of a display period corresponding to each display gray scale within the accumulated display time, and obtaining a weighted average value of all display gray scales, which is not limited in this embodiment.
And step 130, determining the current brightness deviation of each sub-pixel unit according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, brightness and time.
Specifically, the corresponding relationship between the gray scale, the brightness, and the time of each sub-pixel unit may be stored in advance. The sub-pixel units of the display panel may also be classified, and each type of sub-pixel unit shares a corresponding relationship of gray scale, brightness and time, and for example, the sub-pixel unit of each light-emitting color may be a type of sub-pixel unit, and the sub-pixel unit of each light-emitting color shares a corresponding relationship of gray scale, brightness and time. The display panel can also be partitioned, and the sub-pixel units in each area share the corresponding relation of gray scale, brightness and time.
In addition, the corresponding relationship between each gray scale, luminance and time may include a corresponding relationship between luminance of all gray scales and time, or a corresponding relationship between luminance of a preset gray scale and time, and this embodiment is not particularly limited. For example, the display panel may be partitioned, and when each region displays a 255-gray-scale white picture and a 255-gray-scale monochrome picture, the luminance decay with time is tested, so as to obtain the correspondence between the luminance of the sub-pixel unit of each region at the 255 gray scale and the time.
In addition, the correspondence relationship between the gray scale, the luminance, and the time may be determined by experimental simulation or the like. When determining the current brightness deviation according to the normalized display gray scale and the accumulated display time, the gray scale equal to the normalized display gray scale can be searched first, the corresponding relation between the brightness corresponding to the normalized display gray scale and the time is determined, then the corresponding brightness is searched according to the accumulated display time, and the current brightness deviation is determined according to the difference value between the brightness and the brightness at the initial moment.
And step 140, compensating the display driving signal of the sub-pixel unit according to the current brightness deviation.
Specifically, the current brightness deviation may be compared with a set deviation threshold, and a compensation scheme may be determined according to a relationship between the current brightness deviation and the set deviation threshold.
Optionally, when the current luminance deviation is greater than a set deviation threshold, the display driving signal of the sub-pixel unit is compensated. For example, a certain compensation value may be added or subtracted from the display driving signal, and the compensation value may be determined according to the magnitude of the current brightness deviation, which is not particularly limited in this embodiment. In addition, when the current brightness deviation is smaller than a set deviation threshold value, the compensation value is zero.
In this embodiment, the normalized display gray scale of each sub-pixel unit is calculated according to the display gray scale and the accumulated display time of each display period, the current luminance deviation of each sub-pixel unit is determined according to the normalized display gray scale, the accumulated display time and the corresponding relationship of the pre-stored gray scale, luminance and time, and the display driving signal of the sub-pixel unit is compensated according to the current luminance deviation. The normalized display gray scale represents the average level of the accumulated current of the sub-pixel unit in the accumulated display time, the accumulated display time represents the current accumulation time of the sub-pixel unit, the brightness deviation caused by long-time display of the sub-pixel unit can be reflected well by the current brightness deviation determined according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, the brightness and the time, the display deviation caused by current accumulation can be compensated well by compensating the sub-pixel unit according to the current brightness deviation, the display brightness of each sub-pixel unit meets the display requirement, and accordingly residual images caused by overlarge display differences of different sub-pixel units are avoided.
Optionally, the set deviation threshold is greater than or equal to 2%. Specifically, the inventor finds, through simulation experiments, that display afterimages easily occur when the luminance deviation of the sub-pixel unit is greater than 2%, and the present embodiment can better improve the afterimage problem of the display panel by compensating the display panel when the current luminance deviation is greater than or equal to 2%.
Optionally, calculating a normalized display gray scale of each sub-pixel unit according to the display gray scale of each display period and the accumulated display time includes:
weighting and summing the display gray scales of all the display periods to obtain an accumulated display gray scale;
and taking the quotient of the accumulated display gray scale and the accumulated display time as a normalized display gray scale.
Specifically, because different display gray scales have different contributions to the accumulation current, the normalized display gray scale obtained by giving different weight values to the different display gray scales can reflect the current accumulation degree of the sub-pixel unit better, so that the brightness deviation can be determined better, and the compensation can be performed better. For example, the degree of contribution of each display gray scale to the accumulated current may be determined experimentally, and the weight value of each display gray scale may be determined.
Optionally, the weight value of each display gray scale is determined according to the duration of the display time period corresponding to the display gray scale.
Specifically, because the same display gray scale has different display durations and different contributions to the accumulated current, the normalized display gray scale obtained by determining the weight of the corresponding display gray scale through the duration of the display period can reflect the current accumulation degree of the sub-pixel unit better, so that the brightness deviation is determined better, and the compensation is performed better.
For example, the display gray scale of a certain sub-pixel unit from the initial lighting time to the current time includes: the first display period displays the a-gray scale, the second display period displays the b-gray scale, the third display period displays the c-gray scale, the time length of the first display period is s1, the time length of the second display period is s2, and the time length of the third display period is s3, so that the cumulative display gray scale may be a + s1+ b s2+ c + s3, and the normalized display gray scale is (a + s1+ b s2+ c + s3)/(s1+ s2+ s 3).
Optionally, determining the current luminance deviation of each sub-pixel according to the normalized display gray scale, the accumulated display time, and a pre-stored correspondence relationship between gray scale, luminance, and time includes:
pre-storing the corresponding relation between the brightness and time of a plurality of set gray scales;
and determining the current brightness deviation corresponding to the normalized display gray scale and the accumulated display time according to the corresponding relation between the brightness of the set gray scale and the time.
The number of the set gray levels can be set according to needs, and can be exemplarily three or more, and the specific gray level of the set gray levels can also be set according to the display needs of the display panel, for example, three set gray levels can be set, such as 64 gray levels, 128 gray levels, 255 gray levels, and the like. In addition, if the display panel is used more in the high gray scale, the set gray scale may be set to a plurality of set gray scales in the high gray scale range, and if the display panel is used more in the low gray scale range, the set gray scale may be set to a plurality of set gray scales in the low gray scale range.
Specifically, when the normalized display gray scale is equal to a certain set gray scale, the luminance of the set gray scale and the time corresponding relation can be directly used to determine the current luminance deviation, and when the normalized display gray scale is not equal to the set gray scale, the current luminance deviation can be determined through certain numerical processing. For example, a set gray scale closest to the normalized display gray scale may be found, a set luminance difference corresponding to the accumulated display time of the set gray scale may be determined according to a correspondence between luminance corresponding to the set gray scale and time, and a current luminance deviation corresponding to the normalized display gray scale may be determined by multiplying the set luminance difference by a certain coefficient.
In this embodiment, the current luminance deviation corresponding to the normalized display gray scale and the accumulated display time is determined according to the correspondence between the luminance of a plurality of set gray scales and the time, and compared with a correspondence table storing the luminance of each gray scale and the time, the data storage amount of this embodiment is less, and the storage space is saved.
Optionally, determining a current luminance deviation corresponding to the normalized display gray scale and the accumulated display time according to the correspondence between the luminance of the set gray scale and the time includes:
and determining the current brightness deviation corresponding to the normalized display gray scale and the accumulated display time by adopting an interpolation algorithm according to the corresponding relation between the brightness of the set gray scale and the time.
Specifically, two setting gray scales closest to the normalized display gray scale may be found, two setting luminance difference values corresponding to the two setting gray scales when the two setting gray scales display accumulated display time are determined according to the correspondence between the luminance and the time corresponding to the two setting gray scales, and the two setting luminance difference values are interpolated to determine the current luminance deviation.
Illustratively, table 1 shows display data of a sub-pixel unit from an initial time, and referring to table 1, when the cumulative display time is 600h, all display data are weighted-cumulatively added to obtain a cumulative display gray scale 93000, and a quotient of the cumulative display gray scale and the cumulative display time is obtained to obtain a normalized display gray scale 155. Fig. 2 is a curve of correspondence between gray scale and luminance and time according to the present embodiment, and fig. 2 shows correspondence between luminance and time of 64 gray scale, 128 gray scale and 255 gray scale. Referring to fig. 2, it can be found by the interpolation algorithm that the luminance corresponding to the 155 gray-scale display 600h is 97% of the initial luminance, and then the current luminance deviation is 3%, and the display driving data is compensated according to the current luminance deviation.
TABLE 1
Fig. 3 is a schematic diagram of the compensation apparatus for a display panel provided in this embodiment, and referring to fig. 3, the compensation apparatus for a display panel includes:
a data obtaining module 210, configured to obtain an accumulated display time of each sub-pixel unit of the display panel and a display gray scale corresponding to each display time interval within the accumulated display time;
a normalization calculation module 220, configured to calculate a normalized display gray scale of each sub-pixel unit according to the display gray scale of each display period and the accumulated display time;
a brightness deviation determining module 230, configured to determine a current brightness deviation of each sub-pixel unit according to the normalized display gray scale, the accumulated display time, and a pre-stored correspondence relationship between gray scale, brightness, and time;
and a compensation module 240, configured to compensate the display driving signal of the sub-pixel unit according to the current brightness deviation.
Optionally, the normalization calculation module 220 includes:
the accumulative display gray scale determining unit is used for weighting and summing the display gray scales of different display periods to obtain an accumulative display gray scale;
and the normalization calculation unit is used for taking the quotient of the accumulated display gray scale and the accumulated display time as a normalization display gray scale.
Optionally, the weight value of each display gray scale is determined according to the duration of the display time period corresponding to the display gray scale.
Optionally, the brightness deviation determining module 230 includes:
the storage unit is used for pre-storing the corresponding relation between the brightness and the time of a plurality of set gray scales;
and the deviation determining unit is used for determining the current brightness deviation corresponding to the normalized display gray scale and the accumulated display time according to the corresponding relation between the brightness of the set gray scale and the time.
Optionally, the deviation determining unit is specifically configured to:
and determining the current brightness deviation corresponding to the normalized display gray scale and the accumulated display time by adopting an interpolation algorithm according to the corresponding relation between the brightness of the set gray scale and the time.
The compensation apparatus for a display panel provided in this embodiment and the compensation method for a display panel provided in any embodiment of the present invention belong to the same inventive concept, and have corresponding beneficial effects, and detailed technical details of the compensation apparatus for a display panel provided in any embodiment of the present invention are not described in detail in this embodiment.
Fig. 4 is a schematic diagram of a display device provided in this embodiment, and referring to fig. 4, a display device 300 includes a display panel 100 and a compensation device 200 of the display panel according to any embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A compensation method for a display panel, comprising:
acquiring accumulated display time of each sub-pixel unit of a display panel and a display gray scale corresponding to each display time interval in the accumulated display time;
calculating the normalized display gray scale of each sub-pixel unit according to the display gray scale of each display time interval and the accumulated display time;
determining the current brightness deviation of each sub-pixel unit according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, brightness and time;
and compensating the display driving signal of the sub-pixel unit according to the current brightness deviation.
2. The method of claim 1, wherein calculating a normalized display gray scale for each sub-pixel unit according to the display gray scale for each display period and the accumulated display time comprises:
weighting and summing the display gray scales of all the display periods to obtain an accumulated display gray scale;
and taking the quotient of the accumulated display gray scale and the accumulated display time as a normalized display gray scale.
3. The method of claim 2, comprising:
and determining the weight value of each display gray scale according to the duration of the display time period corresponding to each display gray scale.
4. The method of claim 1, wherein determining the current luminance deviation of each sub-pixel according to the normalized display gray scale, the accumulated display time, and a pre-stored gray scale, luminance and time correspondence comprises:
pre-storing the corresponding relation between the brightness and time of a plurality of set gray scales;
and determining the current brightness deviation corresponding to the normalized display gray scale and the accumulated display time according to the corresponding relation between the brightness of the set gray scale and the time.
5. The method of claim 4, wherein determining the current luminance deviation corresponding to the normalized display gray scale and the accumulated display time according to the correspondence of the luminance of the set gray scale and the time comprises:
and determining the current brightness deviation corresponding to the normalized display gray scale and the accumulated display time by adopting an interpolation algorithm according to the corresponding relation between the brightness of the set gray scale and the time.
6. The method of claim 1, wherein compensating the display driving signals of the sub-pixel units according to the current luminance deviation comprises:
and when the current brightness deviation is larger than a set deviation threshold value, compensating the display driving signal of the sub-pixel unit.
7. The method of claim 6, wherein:
the set deviation threshold is greater than or equal to 2%.
8. A compensation apparatus for a display panel, comprising:
the data acquisition module is used for acquiring the accumulated display time of each sub-pixel unit of the display panel and the display gray scale corresponding to each display time interval in the accumulated display time;
the normalization calculation module is used for calculating the normalization display gray scale of each sub-pixel unit according to the display gray scale of each display time interval and the accumulated display time;
the brightness deviation determining module is used for determining the current brightness deviation of each sub-pixel unit according to the normalized display gray scale, the accumulated display time and the corresponding relation of the pre-stored gray scale, the pre-stored brightness and the pre-stored time;
and the compensation module is used for compensating the display driving signals of the sub-pixel units according to the current brightness deviation.
9. The apparatus of claim 8, wherein the normalization computation module comprises:
the accumulative display gray scale determining unit is used for weighting and summing the display gray scales of all display periods to obtain an accumulative display gray scale;
and the normalization calculation unit is used for taking the quotient of the accumulated display gray scale and the accumulated display time as a normalization display gray scale.
10. A display device characterized by comprising a display panel and a compensation device of the display panel according to any one of claims 8 to 9.
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| CN112365840A (en) * | 2020-11-24 | 2021-02-12 | 昆山工研院新型平板显示技术中心有限公司 | Display panel compensation method and device and display device |
| CN112447137A (en) * | 2020-11-30 | 2021-03-05 | 昆山工研院新型平板显示技术中心有限公司 | Display panel compensation method and device and display device |
| CN112863439A (en) * | 2021-01-21 | 2021-05-28 | 京东方科技集团股份有限公司 | Method and device for improving OLED (organic light emitting diode) afterimage, display device and medium |
| CN113241030A (en) * | 2021-04-27 | 2021-08-10 | 广东小天才科技有限公司 | Display screen brightness compensation method and device and electronic equipment |
| WO2023201989A1 (en) * | 2022-04-21 | 2023-10-26 | 昆山国显光电有限公司 | Compensation method and compensation apparatus for display panel, and display apparatus and storage medium |
| WO2024001496A1 (en) * | 2022-06-30 | 2024-01-04 | 京东方科技集团股份有限公司 | Display method and apparatus for tiled display screen, computer device, and storage medium |
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