CN110599943A - Display panel pixel compensation method and compensation device and display panel - Google Patents
Display panel pixel compensation method and compensation device and display panel Download PDFInfo
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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
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- 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
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of display, and provides a pixel compensation method for a display panel, wherein the display panel comprises a plurality of sub-display areas, and the method comprises the following steps: acquiring display picture data, and acquiring gray data of each color sub-pixel in each sub-display area according to the display picture data; acquiring a brightness accumulation representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area; acquiring voltage compensation data corresponding to the brightness accumulated characteristic value according to a preset mapping relation by using the brightness accumulated characteristic value of the sub-display area; the voltage compensation data comprises voltage compensation data of each color sub-pixel unit in the sub-display area. The display panel pixel compensation method provided by the disclosure can be used for respectively and independently compensating the sub-pixel units with different colors in the display panel, so that the problem of color cast of the display panel can be effectively improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel pixel compensation method, a compensation device and a display panel.
Background
The display panel comprises a plurality of sub-pixel units distributed in an array, and each sub-pixel unit comprises a pixel driving circuit used for emitting light. The pixel drive circuit is generally supplied with power from a power IC (power supply circuit). The power IC (power circuit) is generally disposed at one side of the display panel, and is connected to the pixel driving circuits in the same column through a power line for providing driving power to the pixel units in the column. However, since the power line has a voltage drop, the pixel unit far from the power IC (power circuit) emits light darkly, so that different pixel units of the display panel need to be compensated.
In the related art, the current accumulation effect of the display panel is usually obtained by testing the brightness distribution of the display panel, so as to perform driving compensation on the picture data to be displayed. However, in the related art, the contribution weight of the sub-pixel units with different colors to the current accumulation effect is not considered, the sub-pixel units with different colors are usually compensated with the same data, and the color shift of the display panel after pixel compensation is caused due to the different characteristics of the light emitting elements of the sub-pixel units with different colors.
It is to be noted that the information invented in the above background section is only for enhancing the understanding of the background of the present invention, and therefore, may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a display panel pixel compensation method, a compensation device and a display panel. The display panel pixel compensation method can solve the problem that the display panel has color cast after pixel compensation in the related technology.
Additional features and advantages of the invention will be set forth in the detailed description which follows, or may be learned by practice of the invention.
According to an aspect of the present invention, there is provided a display panel pixel compensation method, the display panel including a plurality of sub-display regions, the method comprising:
acquiring display picture data, and acquiring gray data of each color sub-pixel in each sub-display area according to the display picture data;
acquiring a brightness accumulation representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area;
acquiring voltage compensation data corresponding to the brightness accumulated characteristic value according to a preset mapping relation by using the brightness accumulated characteristic value of the sub-display area;
the voltage compensation data comprises voltage compensation data of each color sub-pixel unit in the sub-display area.
In an exemplary embodiment of the present disclosure, the method further includes:
and compensating the driving voltage to each color sub-pixel unit in each sub-display area in real time according to the voltage compensation data.
In an exemplary embodiment of the present disclosure, obtaining a luminance cumulative characteristic value of each sub-display region according to gray scale data of each color sub-pixel in the sub-display region includes:
acquiring a brightness representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area;
and acquiring a brightness accumulated characteristic value of a certain sub-display area according to the brightness characteristic value of each sub-display area.
In an exemplary embodiment of the present disclosure, obtaining a luminance characterizing value of each sub-display region according to gray scale data of each color sub-pixel in the sub-display region includes:
acquiring the average gray scale of each color sub-pixel in each sub-display area according to the gray scale data of each color sub-pixel;
acquiring the average brightness of each color sub-pixel in each sub-display area according to the average gray scale of each color sub-pixel in each sub-display area;
and acquiring a brightness representation value of each sub-display area by combining the real-time brightness of the display panel according to the average brightness of each color sub-pixel in each sub-display area.
In an exemplary embodiment of the present disclosure, obtaining an average luminance of each color sub-pixel in each sub-display region according to an average gray scale of each color sub-pixel in each sub-display region includes:
calculating the average brightness of each color sub-pixel in the sub-display area according to a formula APL (equal to g/255);
wherein, APL refers to the average brightness of each color sub-pixel, and g is the average gray scale of each color sub-pixel.
In an exemplary embodiment of the present disclosure, obtaining a luminance representation value of each sub-display region according to an average luminance of each color sub-pixel in each sub-display region and by combining a real-time luminance of a display panel includes:
according to the formulaCalculating the brightness representation value of each sub-display area;
wherein, DL refers to a luminance representative value of the display area, DBV refers to the real-time luminance of the display panel, DBVMax refers to the maximum luminance of the display panel, APLn refers to the average luminance of each color sub-pixel, and β refers to the contribution coefficient of each color sub-pixel to the luminance.
In an exemplary embodiment of the present disclosure, obtaining a luminance accumulated characterization value of a certain sub-display area according to a luminance characterization value of each sub-display area includes:
according to the formula: DLlocal (x, y) ([ DL (1,1) + DL (1,2) + … + DL (1, y) + DL (2,1) + DL (2,2) + … + DL (m, y) + … + DL (m,1) + DL (m,2) + … + DL (m, y) ]/(m × y)), and calculating a cumulative characterization of the luminance of the sub-display region;
DLlocal (x, y) represents the cumulative representation value of the luminance of the x-th sub-display area in the row direction and the y-th sub-display area in the column direction, and m represents the number of columns of the display panel including the sub-display areas.
According to one aspect of the present invention, there is provided a display panel pixel compensation apparatus, the display panel including a plurality of sub-display regions, the apparatus comprising:
the acquisition unit is used for acquiring display picture data and acquiring gray data of each color sub-pixel in each sub-display area according to the display picture data;
the computing unit is used for acquiring the brightness accumulated representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area;
the processing unit is used for acquiring voltage compensation data corresponding to the brightness accumulated representation value according to a preset mapping relation by utilizing the brightness accumulated representation value of the sub-display area;
the voltage compensation data comprises voltage compensation data of each color sub-pixel unit in the sub-display area.
In an exemplary embodiment of the present disclosure, the apparatus further includes:
and the compensation unit is used for compensating the driving voltage to each color sub-pixel unit in each sub-display area in real time according to the voltage compensation data.
According to an aspect of the present invention, a display panel is provided, which includes the above-mentioned display panel pixel compensation device.
The disclosure provides a display panel pixel compensation method, a compensation device and a display panel. The display panel comprises a plurality of sub-display areas, and the compensation method comprises the following steps: acquiring display picture data, and acquiring gray data of each color sub-pixel in each sub-display area according to the display picture data; acquiring a brightness accumulation representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area; acquiring voltage compensation data corresponding to the brightness accumulated characteristic value according to a preset mapping relation by using the brightness accumulated characteristic value of the sub-display area; the voltage compensation data comprises voltage compensation data of each color sub-pixel unit in the sub-display area. The display panel pixel compensation method provided by the disclosure can be used for respectively and independently compensating the sub-pixel units with different colors in the display panel, so that the problem of color cast of the display panel can be effectively improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic diagram illustrating a display panel according to a pixel compensation method of the display panel of the present disclosure;
FIG. 2 is a flow chart of an exemplary embodiment of a method for compensating pixels of a display panel according to the related art;
FIG. 3 is a schematic structural diagram of an exemplary embodiment of a pixel compensation device for a display panel according to the present disclosure;
fig. 4 is a schematic structural diagram of another exemplary embodiment of a pixel compensation device of a display panel according to the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". Other relative terms, such as "high," "low," "top," "bottom," "left," "right," and the like are also intended to have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
The exemplary embodiment first provides a display panel pixel compensation method, as shown in fig. 1, which is a schematic structural diagram of a display panel in the display panel pixel compensation method of the present disclosure, where the display panel 1 may include a plurality of sub-display regions 11, where the plurality of sub-display regions 11 may be distributed in an array structure, and the array structure includes n rows and m columns of sub-display regions block (1,1), block (1,2) … … block (1, n), block (2,1), block (2,2) … … block (2, n) … … block (m,1), block (m,2) … … block (m, n). As shown in fig. 2, a flowchart of an exemplary embodiment of a pixel compensation method for a display panel in the related art is shown, the method comprising:
step S1: acquiring display picture data, and acquiring gray data of each color sub-pixel in each sub-display area according to the display picture data;
step S2: acquiring a brightness accumulation representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area;
step S3: acquiring voltage compensation data corresponding to the brightness accumulated characteristic value according to a preset mapping relation by using the brightness accumulated characteristic value of the sub-display area;
the voltage compensation data comprises voltage compensation data of each color sub-pixel unit in the sub-display area.
The present disclosure provides a display panel pixel compensation method. Compared with the pixel compensation method in the related art, the pixel compensation method for the display panel provided by the disclosure can be used for respectively and independently compensating the sub-pixel units with different colors in the display panel, so that the problem of color cast of the display panel can be effectively solved.
In this exemplary embodiment, establishing the preset mapping relationship may include: measuring the brightness distribution of the sub-pixel units with different colors in the display panel and calculating the distribution proportion of the sub-pixel units with different colors for achieving the target white balance by a color matching relation formula; then recording the current of each color sub-pixel unit under different brightness, and using the current to contribute weight of each color sub-pixel unit to the current accumulation effect; the luminance distribution and the current weight of the display panel are studied to calculate the compensation parameters of the panel. The preset mapping relationship can be shown in table 1 below, DLlocal (x, y) can be represented by 8-bit binary numbers, the range is 0-1, corresponding to binary numbers 0-255, and the voltage compensation data Δ vdata can be represented by 10-bit binary numbers.
TABLE 1
The voltage compensation data may be in a lookup table as shown in table 2 below, and the compensation ranges are- (VGMP-VGSP)/1024 × 511-to (VGMP-VGSP)/1024 × 512. Wherein VGMP is a Gamma top voltage and VGSP is a Gamma bottom voltage. The data in the table are fractions of 10 bits, 10 bits are 2^10 ^ 1024, 1/1024 is step for each share, 8 bits are the same.
TABLE 2
In this exemplary embodiment, the method may further include: and compensating the driving voltage to each color sub-pixel unit in each sub-display area in real time according to the voltage compensation data. The method can realize real-time compensation of the pixels of the display panel. The compensation driving voltage can be directly compensated in the data driving signal, so that the compensation driving voltage is directly input into the pixel driving circuit through the source electrode driving circuit; the compensation driving voltage can also be compensated into the pixel driving circuit by a separately provided external compensation circuit.
In this exemplary embodiment, obtaining the luminance cumulative representing value of each sub-display area according to the gray scale data of each color sub-pixel in the sub-display area may include: acquiring a brightness representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area; and acquiring a brightness accumulated characteristic value of a certain sub-display area according to the brightness characteristic value of each sub-display area. The obtaining of the luminance characterizing value of each sub-display area according to the gray scale data of each color sub-pixel in the sub-display area may include: acquiring the average gray scale of each color sub-pixel in each sub-display area according to the gray scale data of each color sub-pixel; acquiring the average brightness of each color sub-pixel in each sub-display area according to the average gray scale of each color sub-pixel in each sub-display area; and acquiring a brightness representation value of each sub-display area by combining the real-time brightness of the display panel according to the average brightness of each color sub-pixel in each sub-display area.
In this exemplary embodiment, obtaining the average luminance of each color sub-pixel in each sub-display region according to the average gray scale of each color sub-pixel in each sub-display region may include:
calculating the average brightness of each color sub-pixel in the sub-display area according to a formula APL (equal to g/255);
wherein, APL refers to the average brightness of each color sub-pixel, and g is the average gray scale of each color sub-pixel.
In this exemplary embodiment, obtaining the luminance characterizing value of each sub-display region according to the average luminance of each color sub-pixel in each sub-display region and by combining the real-time luminance of the display panel may include:
according to the formulaCalculating the brightness representation value of each sub-display area;
wherein, DL refers to a luminance representative value of the display area, DBV refers to the real-time luminance of the display panel, DBVMax refers to the maximum luminance of the display panel, APLn refers to the average luminance of each color sub-pixel, and β refers to the contribution coefficient of each color sub-pixel to the luminance. The sub-display area comprises three sub-pixel units: for example, a red subpixel unit, a blue subpixel unit, and a green subpixel unit are described, where DL ═ DBV/DBVMax (APLr × + APLg × β g + APLb ×) where APLr denotes an average luminance of the red subpixel, β r denotes a contribution coefficient of the red subpixel to the luminance, APLg denotes an average luminance of the green subpixel, β g denotes a contribution coefficient of the green subpixel to the luminance, APLb denotes an average luminance of the blue subpixel, and β b denotes a contribution coefficient of the blue subpixel to the luminance.
In this exemplary embodiment, obtaining the luminance accumulated characterization value of a certain sub-display area according to the luminance characterization value of each sub-display area includes:
according to the formula: DLlocal (x, y) ([ DL (1,1) + DL (1,2) + … + DL (1, y) + DL (2,1) + DL (2,2) + … + DL (m, y) + … + DL (m,1) + DL (m,2) + … + DL (m, y) ]/(m × y)), and calculating a cumulative characterization of the luminance of the sub-display region;
DLlocal (x, y) represents the cumulative representation value of the luminance of the x-th sub-display area in the row direction and the y-th sub-display area in the column direction, and m represents the number of columns of the display panel including the sub-display areas.
The present exemplary embodiment further provides a display panel pixel compensation apparatus, where the display panel includes a plurality of sub-display regions, as shown in fig. 3, which is a schematic structural diagram of an exemplary embodiment of the display panel pixel compensation apparatus of the present disclosure, and the apparatus includes: the display device comprises an acquisition unit 2, a calculation unit 3 and a processing unit 4, wherein the acquisition unit is used for acquiring display picture data and acquiring gray data of each color sub-pixel in each sub-display area according to the display picture data; the computing unit is used for acquiring the brightness accumulated representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area; the processing unit is used for acquiring voltage compensation data corresponding to the brightness accumulated representation value according to a preset mapping relation by utilizing the brightness accumulated representation value of the sub-display area; the voltage compensation data comprises voltage compensation data of each color sub-pixel unit in the sub-display area.
In this exemplary embodiment, as shown in fig. 4, which is a schematic structural diagram of another exemplary embodiment of the display panel pixel compensation apparatus of the present disclosure, the apparatus may further include a compensation unit, and the compensation unit 5 is configured to compensate the driving voltage to each color sub-pixel unit in each sub-display area in real time according to the voltage compensation data. The device can realize real-time compensation of the pixels of the display panel. The compensation unit can share a source electrode driving circuit in the display panel, and the compensation driving voltage can be directly compensated in the data driving signal so as to be directly input into the pixel driving circuit through the source electrode driving circuit. The compensation unit may also be a separately provided external compensation circuit, and the compensation driving voltage may also be compensated into the pixel driving circuit by the separately provided external compensation circuit.
The present exemplary embodiment also provides a display panel including the display panel pixel compensation device described above. The display panel can be applied to display devices such as tablet computers, mobile phones and televisions.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (10)
1. A pixel compensation method for a display panel, the display panel comprising a plurality of sub-display regions, the method comprising:
acquiring display picture data, and acquiring gray data of each color sub-pixel in each sub-display area according to the display picture data;
acquiring a brightness accumulation representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area;
acquiring voltage compensation data corresponding to the brightness accumulated characteristic value according to a preset mapping relation by using the brightness accumulated characteristic value of the sub-display area;
the voltage compensation data comprises voltage compensation data of each color sub-pixel unit in the sub-display area.
2. The display panel pixel compensation method of claim 1, further comprising:
and compensating the driving voltage to each color sub-pixel unit in each sub-display area in real time according to the voltage compensation data.
3. The method for compensating pixels of a display panel according to claim 1, wherein obtaining the accumulated luminance representing values of the sub-display regions according to the gray scale data of the sub-pixels of the colors in the sub-display regions comprises:
acquiring a brightness representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area;
and acquiring a brightness accumulated characteristic value of a certain sub-display area according to the brightness characteristic value of each sub-display area.
4. The method as claimed in claim 3, wherein the obtaining the luminance characterization value of each sub-display region according to the gray scale data of each color sub-pixel in the sub-display region comprises:
acquiring the average gray scale of each color sub-pixel in each sub-display area according to the gray scale data of each color sub-pixel;
acquiring the average brightness of each color sub-pixel in each sub-display area according to the average gray scale of each color sub-pixel in each sub-display area;
and acquiring a brightness representation value of each sub-display area by combining the real-time brightness of the display panel according to the average brightness of each color sub-pixel in each sub-display area.
5. The method as claimed in claim 4, wherein obtaining the average luminance of each color sub-pixel in each sub-display region according to the average gray scale of each color sub-pixel in each sub-display region comprises:
calculating the average brightness of each color sub-pixel in the sub-display area according to a formula APL (equal to g/255);
wherein, APL refers to the average brightness of each color sub-pixel, and g is the average gray scale of each color sub-pixel.
6. The method as claimed in claim 4, wherein the obtaining the luminance characterization value of each sub-display region according to the average luminance of each color sub-pixel in each sub-display region and the real-time luminance of the display panel comprises:
according to the formula DL ═ DBV/DBVMax ∑ Σ1 nCalculating the brightness characteristic value of each sub-display area by APLn beta;
wherein, DL refers to a luminance representative value of the display area, DBV refers to the real-time luminance of the display panel, DBVMax refers to the maximum luminance of the display panel, APLn refers to the average luminance of each color sub-pixel, and β refers to the contribution coefficient of each color sub-pixel to the luminance.
7. The method of claim 3, wherein obtaining the accumulated luminance characteristic value of a sub-display region according to the luminance characteristic value of each sub-display region comprises:
according to the formula: DLlocal (x, y) ([ DL (1,1) + DL (1,2) + … + DL (1, y) + DL (2,1) + DL (2,2) + … + DL (m, y) + … + DL (m,1) + DL (m,2) + … + DL (m, y) ]/(m × y)), and calculating a cumulative characterization of the luminance of the sub-display region;
DLlocal (x, y) represents the cumulative representation value of the luminance of the x-th sub-display area in the row direction and the y-th sub-display area in the column direction, and m represents the number of columns of the display panel including the sub-display areas.
8. A display panel pixel compensation apparatus, the display panel including a plurality of sub-display regions, comprising:
the acquisition unit is used for acquiring display picture data and acquiring gray data of each color sub-pixel in each sub-display area according to the display picture data;
the computing unit is used for acquiring the brightness accumulated representation value of each sub-display area according to the gray data of each color sub-pixel in the sub-display area;
the processing unit is used for acquiring voltage compensation data corresponding to the brightness accumulated representation value according to a preset mapping relation by utilizing the brightness accumulated representation value of the sub-display area;
the voltage compensation data comprises voltage compensation data of each color sub-pixel unit in the sub-display area.
9. The display panel pixel compensation device of claim 8, further comprising:
and the compensation unit is used for compensating the driving voltage to each color sub-pixel unit in each sub-display area in real time according to the voltage compensation data.
10. A display panel comprising the display panel pixel compensation arrangement of claim 8 or 9.
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