CN110364111B - Display panel pixel compensation method and compensation device - Google Patents
Display panel pixel compensation method and compensation device Download PDFInfo
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- CN110364111B CN110364111B CN201910812332.2A CN201910812332A CN110364111B CN 110364111 B CN110364111 B CN 110364111B CN 201910812332 A CN201910812332 A CN 201910812332A CN 110364111 B CN110364111 B CN 110364111B
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- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
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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 scale data of each color sub-pixel in each sub-display area according to the display picture data; acquiring the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area; acquiring gray compensation data of the sub-display area according to the average current of the sub-display area; and calculating the gray compensation data of each sub-pixel by using a bilinear difference method according to the gray compensation data of the sub-display area. The pixel compensation method can avoid the display unevenness of the display panel caused by the voltage drop of the power lines of the sub-pixel units.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel pixel compensation method and compensation apparatus.
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).
In the related art, a power IC (power circuit) is generally disposed at one side of the display panel, and the power IC 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, the pixel unit on the side away from the power IC (power supply circuit) emits light darkly due to the voltage drop of the power supply line.
It is noted that the information of the invention in the above background section is only for enhancement of understanding of the background of the invention and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a display panel pixel compensation method and a compensation device. The pixel compensation method of the display panel can solve the problem of uneven display caused by voltage drop of a power line in the related art.
Additional features and advantages of the invention will be set forth in the detailed description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
According to an aspect of the present invention, there is provided a pixel compensation method for a display panel including a plurality of sub-display regions, the method comprising:
acquiring display picture data, and acquiring gray scale data of each color sub-pixel in each sub-display area according to the display picture data;
acquiring the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area;
acquiring gray compensation data of the sub-display area according to the average current of the sub-display area;
and calculating the gray compensation data of each sub-pixel by using a bilinear difference method according to the gray compensation data of the sub-display area.
In an exemplary embodiment of the present disclosure, obtaining an average current of the sub-display region according to the gray scale data of the sub-pixels of each color 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 standard brightness of each sub-display area of the display panel in a 255-gray scale display state;
acquiring the brightness of each color sub-pixel in each sub-display area by combining the standard brightness according to the average gray scale of each color sub-pixel in each sub-display area;
acquiring the average current of the sub-pixel units with different colors in the display area according to the brightness of the sub-pixels with different colors in the sub-display area;
and obtaining the average current of the sub-display area according to the average current of the sub-pixels of each color in the sub-display area.
In an exemplary embodiment of the present disclosure, obtaining the 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 and combining the standard luminance includes:
according to the formula
Calculating the brightness of the sub-display area;
where L denotes the luminance of each color sub-pixel, L255 denotes the standard luminance, g denotes the average gray-scale value of the sub-display region, and γ denotes the gamma value.
In an exemplary embodiment of the present disclosure, obtaining an average current of sub-pixel units of different colors in the display area according to the brightness of each sub-pixel of the color in the sub-display area includes:
calculating the average current of each color sub-pixel unit according to the formula L = beta Ip;
where L represents the luminance of each color sub-pixel, β represents the conversion coefficient between the luminance of the sub-pixel unit of different color and the current, and Ip represents the average current of the sub-pixel unit.
In an exemplary embodiment of the present disclosure, obtaining an average current of the sub-display area according to an average current of each color sub-pixel in the sub-display area includes:
according to the formula:
calculating an average current of the sub-display areas;
wherein, I b The average current of the display area is shown, rn is the contribution coefficient of the sub-pixel cells of different colors to the current, and Ipn is the average current of the sub-pixel cells of different colors.
In an exemplary embodiment of the present disclosure, obtaining gray compensation data of the sub-display area according to the average current of the sub-display area includes:
acquiring the accumulated current of the sub-display area according to the average current of the sub-display area;
acquiring the accumulated voltage drop of the sub-display area according to the accumulated current of the sub-display area;
acquiring a brightness compensation coefficient of the sub-display area according to the accumulated voltage drop of the sub-display area;
acquiring brightness compensation data of the sub-display area according to the brightness compensation coefficient of the sub-display area;
and acquiring the gray compensation data of the sub-display area according to the brightness compensation data of the sub-display area.
In an exemplary embodiment of the present disclosure, obtaining the luminance compensation coefficient of the sub-display region according to the accumulated voltage drop of the sub-display region includes:
according to the formula
Calculating a brightness compensation coefficient of the sub-display area;
wherein G denotes a luminance compensation coefficient of the sub-display area, V denotes an accumulated voltage drop of the sub-display area, vmax denotes a maximum voltage drop of the display panel, vmin denotes a minimum voltage drop of the display panel, gmax denotes a maximum luminance compensation coefficient of the display panel, and Gmin denotes a minimum luminance compensation coefficient of the display panel.
In an exemplary embodiment of the present disclosure, acquiring luminance compensation data of the sub-display region according to the gain compensation coefficient of the sub-display region includes: calculating brightness compensation data of the sub-display area according to a formula Lc = Lo G;
wherein Lc represents the luminance compensation data of the sub-display area, lo represents the luminance of the sub-display area, and G represents the luminance compensation coefficient of the sub-display area;
acquiring gray compensation data of the sub-display area according to the brightness compensation data of the sub-display area, wherein the gray compensation data comprises:
according to the formula
Calculating gray compensation data of the sub-display area;
where Lc represents luminance compensation data of the sub display region, L255 represents standard luminance, gc represents gray compensation data of the sub display region, and γ represents a gamma value.
In an exemplary embodiment of the present disclosure, the calculating of the gray compensation data of each sub-pixel by the gray compensation data of the sub-display area using a bilinear difference method includes:
acquiring gray level compensation data of the centroid position of the sub-display area as gray level compensation data of the sub-display area;
calculating gray compensation data at the junctions of the four sub-display areas by a bilinear difference method according to the gray compensation data at the centroid positions of the four sub-display areas;
and calculating the gray compensation data of each sub-pixel in the sub-display area by using a bilinear difference value method according to the gray compensation data at the junction of the sub-display areas.
According to an 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 device comprises a receiving unit, a first processing unit, a second processing unit, a third processing unit and a fourth processing unit. A receiving unit for acquiring display picture data; the first processing unit is used for acquiring the gray data of each color sub-pixel in each sub-display area according to the display picture data; the second processing unit is used for acquiring the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area; the third processing unit is used for acquiring the gray compensation data of the sub-display area according to the average current of the sub-display area; and the fourth processing unit is used for calculating the gray compensation data of each sub-pixel by using a bilinear difference method according to the gray compensation data of the sub-display area.
The present disclosure provides a method for compensating pixels of a display panel, the display panel including a plurality of sub-display regions, the method comprising: 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 the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area; acquiring gray compensation data of the sub-display area according to the average current of the sub-display area; and calculating the gray compensation data of each sub-pixel by using a bilinear difference method according to the gray compensation data of the sub-display area. The pixel compensation method can avoid the display unevenness of the display panel caused by the voltage drop of the power lines of the sub-pixel units.
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 flowchart of an exemplary embodiment of a display panel pixel compensation method of the present disclosure;
FIG. 2 is a schematic diagram of a display panel according to an exemplary embodiment of a pixel compensation method for a display panel according to the present disclosure;
FIG. 3 is an equivalent circuit diagram of the sub-display regions in the same column in an exemplary embodiment of the pixel compensation method for a display panel according to the disclosure;
FIG. 4 is a schematic diagram illustrating a display panel according to an exemplary embodiment of a pixel compensation method for a display panel of the present disclosure;
fig. 5 is a schematic structural diagram of an 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 herein to describe one element of an icon relative to another, such terms are used herein for convenience only, e.g., with reference to the orientation of the example illustrated in the drawings. 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 present exemplary embodiment provides a method for compensating a pixel of a display panel, where the display panel includes a plurality of sub-display regions, as shown in fig. 1, which is a flowchart of an exemplary embodiment of the method for compensating a pixel of a display panel according to the present disclosure, and the method includes:
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 the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area;
and step S3: acquiring gray compensation data of the sub-display area according to the average current of the sub-display area;
and step S4: and calculating the gray compensation data of each sub-pixel by using a bilinear difference method according to the gray compensation data of the sub-display area.
The present disclosure provides a method for compensating pixels of a display panel, where the display panel includes a plurality of sub-display regions, the method including: the method comprises the following steps: acquiring display picture data, and acquiring gray scale data of each color sub-pixel in each sub-display area according to the display picture data; acquiring the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area; acquiring gray compensation data of the sub-display area according to the average current of the sub-display area; and calculating the gray compensation data of each sub-pixel by using a bilinear difference method according to the gray compensation data of the sub-display area. The pixel compensation method can avoid the display unevenness of the display panel caused by the voltage drop of the power lines of the sub-pixel units.
The above steps are explained in detail below:
step S1: and acquiring display picture data, and acquiring the gray data of each color sub-pixel in each sub-display area according to the display picture data. The display picture data may include gradation data of each sub-pixel unit, which may be a gradation of 0 to 255 expressed by 8 bits.
Step S2: and acquiring the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area.
In this exemplary embodiment, obtaining the average current of the sub-display area according to the gray scale data of the sub-pixels of each color 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 standard brightness of each sub-display area of the display panel in a 255-gray scale display state;
acquiring the brightness of each color sub-pixel in each sub-display area by combining the standard brightness according to the average gray scale of each color sub-pixel in each sub-display area;
acquiring the average current of the sub-pixel units with different colors in the display area according to the brightness of the sub-pixels with different colors in the sub-display area;
and obtaining the average current of the sub-display area according to the average current of the sub-pixels of each color in the sub-display area.
The obtaining 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 may include: and carrying out average calculation on the gray levels of the sub-pixels with the same color in each sub-display area so as to obtain the average gray level of the sub-pixels with the color.
Acquiring the standard brightness of each sub-display area of the display panel in the 255-gray-scale display state may include: controlling the display panel to display 255 gray scales; the brightness of each sub-display region is then detected by way of measurement.
Obtaining the luminance 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 the standard luminance, may include:
according to the formula
Calculating the brightness of the sub-display area; where L denotes the luminance of each color sub-pixel, L255 denotes the standard luminance, g denotes the average gray-scale value of the sub-display region, and γ denotes the gamma value.
Obtaining the average current of the sub-display area according to the average current of the sub-pixels of each color in the sub-display area may include: calculating the average current of each color sub-pixel unit according to the formula L = beta Ip; where L represents the luminance of each color sub-pixel, β represents the conversion coefficient between the luminance of the sub-pixel unit of different color and the current, and Ip represents the average current of the sub-pixel unit.
Obtaining the average current of the sub-display area according to the average current of the sub-pixels of each color in the sub-display area may include:
according to the formula:
calculating an average current of the sub-display areas; wherein, I b The average current of the display area is shown, rn the contribution coefficient of the sub-pixel cells of different colors to the total current, and Ipn the average current of the sub-pixel cells of different colors. For example, the display panel may include three color sub-pixel units R, G, B in a sub-pixelThe average current of the R sub-pixel in the display area is Ipr, the average current of the G sub-pixel is Ipg, and the average current of the B sub-pixel is Ipb; the contribution coefficient of the R sub-pixel to the total current is Rr, the contribution coefficient of the G sub-pixel to the total current is Rg, and the contribution coefficient of the B sub-pixel to the total current is Rb. Then, the average current of the sub-display area is I b ＝Ipr*Rr+Ipg*Rg+Ipb*Rb。
And step S3: and acquiring the gray compensation data of the sub-display area according to the average current of the sub-display area.
In this exemplary embodiment, obtaining the gray compensation data of the sub-display area according to the average current of the sub-display area may include:
acquiring the accumulated current of the sub-display area according to the average current of the sub-display area;
acquiring the accumulated voltage drop of the sub-display area according to the accumulated current of the sub-display area;
acquiring a brightness compensation coefficient of the sub-display area according to the accumulated voltage drop of the sub-display area;
acquiring brightness compensation data of the sub-display area according to the brightness compensation coefficient of the sub-display area;
and acquiring gray compensation data of the sub-display area according to the brightness compensation data of the sub-display area.
Obtaining the accumulated current of the sub-display area according to the average current of the sub-display area may include: fig. 2 is a schematic structural diagram of a display panel in an exemplary embodiment of a pixel compensation method of a display panel according to the present disclosure. In the present exemplary embodiment, the display region of the display panel may be divided into 5 × 3 rectangular sub-display regions 11, 12, 13, 21 \8230; 35. Fig. 3 is an equivalent circuit diagram of the sub-display regions in the same column in an exemplary embodiment of the pixel compensation method of the display panel according to the disclosure. Wherein, R represents the equivalent resistance of each sub-display region. The size of each sub-display region in the present exemplary embodiment may be the same, so that the equivalent resistance of each sub-display region is R. It should be understood that in other exemplary embodiments, the sizes of the respective sub-display areas may not be the same. In fig. 3, ib1, ib2, ib3, ib4, and Ib5 are average currents in the sub display regions 11, 21, 31, 41, and 51, respectively. Correspondingly, ia1, ia2, ia3, ia4, and Ia5 are the accumulated currents of the sub-display regions 11, 21, 31, 41, and 51, respectively. Ia1= Ib1+ Ib2+ Ib3+ Ib4+ Ib5, ia2= Ib2+ Ib3+ Ib4+ Ib5, ia3= Ib3+ Ib4+ Ib5, ia4= Ib4+ Ib5, ia5= Ib5.
Obtaining the accumulated voltage drop of the sub-display area according to the accumulated current of the sub-display area may include: as shown in fig. 3, the cumulative pressure drop V1= Ia1 × R of the sub display region 11, the cumulative pressure drop V2= Ia1 × R + Ia2 × R of the sub display region 21, the cumulative pressure drop V3= Ia1 × R + Ia2 × R + Ia3 × R of the sub display region 31, the cumulative pressure drop V4= Ia1 × R + Ia2 × R + Ia3 × R + Ia4 × R of the sub display region 41, and the cumulative pressure drop V5= Ia1 × R + Ia2 × R + Ia3 × R + Ia4 × R of the sub display region 51.
Obtaining the luminance compensation coefficient of the sub-display area according to the accumulated voltage drop of the sub-display area may include:
according to the formula
Calculating a brightness compensation coefficient of the sub-display area; wherein G denotes a luminance compensation coefficient of the sub-display area, V denotes an accumulated voltage drop of the sub-display area, vmax denotes a maximum voltage drop of the display panel, vmin denotes a minimum voltage drop of the display panel, gmax denotes a maximum luminance compensation coefficient of the display panel, and Gmin denotes a minimum luminance compensation coefficient of the display panel. In the present exemplary embodiment, vmax, vmin may be obtained by means of physical measurement or simulation test. Gmax and Gmin may be set according to actual conditions.
Acquiring the luminance compensation data of the sub-display region according to the gain compensation coefficient of the sub-display region may include:
calculating brightness compensation data of the sub-display area according to a formula Lc = Lo G; where Lc represents luminance compensation data of the sub display area, lo represents luminance of the sub display area, and G represents a luminance compensation coefficient of the sub display area.
Acquiring the gray compensation data of the sub-display area according to the brightness compensation data of the sub-display area may include:
according to the formula
Calculating gray compensation data of the sub-display area;
wherein Lc represents the luminance compensation data of the sub display region, L255 represents the standard luminance, gc represents the gray compensation data of the sub display region, and γ represents the gamma value.
In an exemplary embodiment of the present disclosure, the calculating of the gray compensation data of each sub-pixel by the gray compensation data of the sub-display area using a bilinear difference method may include:
fig. 4 is a schematic structural diagram of a display panel in an exemplary embodiment of a pixel compensation method of a display panel according to the present disclosure. Fig. 4 illustrates an example of 4 adjacent sub-display regions, and as shown in fig. 4, the method acquires the gray scale compensation data of the centroid position (black solid dot) of the sub-display region as the gray scale compensation data of the sub-display region; and calculating gray compensation data of junctions (hollow dots) of the four sub-display areas by a bilinear difference method according to the gray compensation data of the centroid positions of the four sub-display areas. Similarly, the gray compensation data of other boundary points can be obtained through other adjacent sub-display areas. And calculating the gray compensation data of each sub-pixel in the sub-display area by utilizing a bilinear difference method according to the gray compensation data at the junction of the sub-display areas.
The present exemplary embodiment further provides a display panel pixel compensation apparatus, as shown in fig. 5, which is a schematic structural diagram of an exemplary embodiment of the display panel pixel compensation apparatus of the present disclosure. The display panel includes a plurality of sub-display regions, and the apparatus includes: the device comprises a receiving unit 1, a first processing unit 2, a second processing unit 3, a third processing unit 4 and a fourth processing unit 5. A receiving unit for acquiring display picture data; the first processing unit is used for acquiring the gray data of each color sub-pixel in each sub-display area according to the display picture data; the second processing unit is used for acquiring the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area; the third processing unit is used for acquiring the gray compensation data of the sub-display area according to the average current of the sub-display area; and the fourth processing unit is used for calculating the gray compensation data of each sub-pixel by using a bilinear difference method according to the gray compensation data of the sub-display area.
The display panel pixel compensation device provided by the present disclosure has the same technical features and working principles as the display panel pixel compensation method, and the above contents have already been described in detail and are not repeated herein.
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 (9)
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 the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area;
acquiring gray compensation data of the sub-display area according to the average current of the sub-display area;
calculating the gray compensation data of each sub-pixel by utilizing a bilinear difference method according to the gray compensation data of the sub-display area;
obtaining gray scale compensation data of the sub-display area according to the average current of the sub-display area, comprising:
acquiring the accumulated current of the sub-display area according to the average current of the sub-display area;
acquiring the accumulated voltage drop of the sub-display area according to the accumulated current of the sub-display area;
acquiring a brightness compensation coefficient of the sub-display area according to the accumulated voltage drop of the sub-display area;
acquiring brightness compensation data of the sub-display area according to the brightness compensation coefficient of the sub-display area;
and acquiring the gray compensation data of the sub-display area according to the brightness compensation data of the sub-display area.
2. The method of claim 1, wherein obtaining the average current of the sub-display region according to the gray data of the sub-pixels of each color 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 standard brightness of each sub-display area of the display panel in a 255-gray scale display state;
acquiring the brightness of each color sub-pixel in each sub-display area by combining the standard brightness according to the average gray scale of each color sub-pixel in each sub-display area;
acquiring the average current of the sub-pixel units with different colors in the display area according to the brightness of the sub-pixels with different colors in the sub-display area;
and obtaining the average current of the sub-display area according to the average current of the sub-pixels of each color in the sub-display area.
3. The method as claimed in claim 2, wherein the obtaining the luminance 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 in combination with the standard luminance comprises:
according to the formula
Calculating the brightness of the sub-display area;
where L denotes the luminance of each color sub-pixel, L255 denotes the standard luminance, g denotes the average gray-scale value of the sub-display region, and γ denotes the gamma value.
4. The display panel pixel compensation method of claim 2,
obtaining the average current of the sub-pixel units with different colors in the display area according to the brightness of the sub-pixels with different colors in the sub-display area, wherein the average current comprises the following steps:
calculating the average current of each color sub-pixel unit according to the formula L = beta Ip;
where L represents the luminance of each color sub-pixel, β represents the conversion coefficient between the luminance of the sub-pixel unit of different color and the current, and Ip represents the average current of the sub-pixel unit.
5. The display panel pixel compensation method of claim 2,
obtaining the average current of the sub-display area according to the average current of the sub-pixels of each color in the sub-display area, including:
according to the formula:
calculating an average current of the sub-display areas;
wherein, I b The average current of the display area is shown, rn the coefficient of contribution of the sub-pixel cells of different colors to the current, and Ipn the average current of the sub-pixel cells of different colors.
6. The method as claimed in claim 1, wherein obtaining the luminance compensation coefficient of the sub-display region according to the accumulated voltage drop of the sub-display region comprises:
according to the formula
Calculating a brightness compensation coefficient of the sub-display area;
wherein G denotes a luminance compensation coefficient of the sub-display area, V denotes an accumulated voltage drop of the sub-display area, vmax denotes a maximum voltage drop of the display panel, vmin denotes a minimum voltage drop of the display panel, gmax denotes a maximum luminance compensation coefficient of the display panel, and Gmin denotes a minimum luminance compensation coefficient of the display panel.
7. The method as claimed in claim 1, wherein the obtaining the luminance compensation data of the sub-display region according to the gain compensation coefficient of the sub-display region comprises: calculating brightness compensation data of the sub-display area according to a formula Lc = Lo G;
wherein Lc represents the luminance compensation data of the sub-display area, lo represents the luminance of the sub-display area, and G represents the luminance compensation coefficient of the sub-display area;
acquiring gray compensation data of the sub-display area according to the brightness compensation data of the sub-display area, wherein the method comprises the following steps:
according to the formula
Calculating gray compensation data of the sub-display area;
wherein Lc represents the luminance compensation data of the sub display region, L255 represents the standard luminance, gc represents the gray compensation data of the sub display region, and γ represents the gamma value.
8. The method of claim 1, wherein the calculating the gray compensation data for each sub-pixel by using bilinear difference method comprises:
acquiring gray level compensation data of the centroid position of the sub-display area as gray level compensation data of the sub-display area;
calculating gray compensation data at the junctions of the four sub-display areas by a bilinear difference method according to the gray compensation data at the centroid positions of the four sub-display areas;
and calculating the gray compensation data of each sub-pixel in the sub-display area by utilizing a bilinear difference method according to the gray compensation data at the junction of the sub-display areas.
9. A display panel pixel compensation apparatus, the display panel including a plurality of sub-display regions, comprising:
a receiving unit for acquiring display picture data;
the first processing unit is used for acquiring the gray data of each color sub-pixel in each sub-display area according to the display picture data;
the second processing unit is used for acquiring the average current of the sub-display area according to the gray data of the sub-pixels of each color in the sub-display area;
the third processing unit is used for acquiring the gray compensation data of the sub-display area according to the average current of the sub-display area;
the fourth processing unit is used for calculating the gray compensation data of each sub-pixel by using a bilinear difference method according to the gray compensation data of the sub-display area;
acquiring gray compensation data of the sub-display area according to the average current of the sub-display area, comprising the following steps:
acquiring the accumulated current of the sub-display area according to the average current of the sub-display area;
acquiring the accumulated voltage drop of the sub-display area according to the accumulated current of the sub-display area;
acquiring a brightness compensation coefficient of the sub-display area according to the accumulated voltage drop of the sub-display area;
acquiring brightness compensation data of the sub-display area according to the brightness compensation coefficient of the sub-display area;
and acquiring gray compensation data of the sub-display area according to the brightness compensation data of the sub-display area.
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| CN110599943B (en) * | 2019-10-25 | 2023-05-30 | 京东方科技集团股份有限公司 | Display panel pixel compensation method and compensation device and display panel |
| CN111754942B (en) * | 2020-07-29 | 2022-04-15 | 京东方科技集团股份有限公司 | Brightness compensation method, device and equipment of display device and display device |
| TWI739658B (en) * | 2020-11-10 | 2021-09-11 | 聯詠科技股份有限公司 | Image processing method |
| CN115004290A (en) * | 2020-12-21 | 2022-09-02 | 京东方科技集团股份有限公司 | Method for processing display signal of display device, apparatus thereof, and display apparatus |
| CN112581901B (en) * | 2020-12-31 | 2024-02-20 | 厦门天马微电子有限公司 | Display panel, display driving method thereof and electronic equipment |
| CN113077748B (en) * | 2021-03-31 | 2023-06-30 | Tcl华星光电技术有限公司 | Gray scale compensation method, gray scale compensation device and gray scale compensation system of display panel |
| CN114241958B (en) * | 2021-11-02 | 2022-05-10 | 惠科股份有限公司 | Display panel testing method, driving method and display device |
| CN114203095B (en) * | 2021-12-27 | 2024-06-04 | 深圳市华星光电半导体显示技术有限公司 | Display compensation method, device and system and display equipment |
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