CN113284450B - Display panel edge color cast compensation method and device - Google Patents
Display panel edge color cast compensation method and device Download PDFInfo
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- CN113284450B CN113284450B CN202110552581.XA CN202110552581A CN113284450B CN 113284450 B CN113284450 B CN 113284450B CN 202110552581 A CN202110552581 A CN 202110552581A CN 113284450 B CN113284450 B CN 113284450B
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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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- 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
- G09G3/2003—Display of colours
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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
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
Abstract
The invention provides a compensation method and device for color cast of an edge of a display panel. The compensation method for the color cast of the edge of the display panel comprises the following steps: when detecting that a picture to be displayed of the display panel contains color blocks, determining registers corresponding to sub-pixels of different colors of each of four edges of the color blocks; and carrying out pixel compensation on the corresponding sub-pixels by utilizing the compensation parameters prestored in the register. According to the compensation method provided by the embodiment of the invention, different sub-pixels at the edge of the color block are independently regulated and compensated by setting different registers, so that the problem of color cast of the edge can be solved without increasing the cost and the size of a logic board.
Description
Technical Field
The invention relates to the technical field of display, in particular to a compensation method and device for color cast of an edge of a display panel.
Background
For a large-sized display panel, the PPI (pixel density) is low, so that the real RGB mode is generally adopted for the arrangement design. However, since the medium-and-large-sized products have high demands for life, afterimage, and the like, when the arrangement design of the sub-pixels is performed, the arrangement design is not performed in a standard manner as in the case of LCD (Liquid Crystal Display ) products, but is performed in an irregular manner, and when the display panel displays the picture of the color block, the arrangement design is performed in such an irregular manner, so that the edge color shift easily occurs at the edge of the color block.
Disclosure of Invention
In view of this, the invention provides a method and a device for compensating color shift at the edge of a display panel, which can solve the problem of color shift at the edge of a color block caused by irregular arrangement of sub-pixels of the display panel in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
an embodiment of a first aspect of the present invention provides a method for compensating color shift of an edge of a display panel, including:
when detecting that a picture to be displayed of the display panel contains color blocks, determining registers corresponding to sub-pixels of different colors of each of four edges of the color blocks;
and carrying out pixel compensation on the corresponding sub-pixels by utilizing the compensation parameters prestored in the register.
Optionally, the performing pixel compensation on the corresponding sub-pixels by using the compensation parameters pre-stored in the register includes:
acquiring the display brightness value of the display panel and the gray scale information of the same-color sub-pixels on the same edge of the color block in the picture to be displayed;
determining a target compensation parameter from compensation parameters prestored in the register according to the display brightness value and the gray scale information;
and compensating the corresponding sub-pixels by using the target compensation parameters.
Optionally, before the pixel compensation is performed on the corresponding sub-pixel by using the compensation parameter pre-stored in the register, the method further includes:
setting first compensation parameters of sub-pixels of each edge under different gray scales under a reference display brightness value of the display panel;
setting second compensation parameters of sub-pixels of each edge under different display brightness values according to the reference display brightness value and the first compensation parameters;
the first compensation parameter and the second compensation parameter are pre-stored in corresponding registers.
Optionally, setting the first compensation parameter of the sub-pixels of each edge at different gray scales under the reference display brightness value of the display panel includes:
setting reference compensation values of sub-pixels of each edge under the target gray scale;
determining a first compensation coefficient between the compensation value and the reference compensation value of the gray scales of 0-255 except the target gray scale;
the reference compensation value and the first compensation coefficient are determined as the first compensation parameter.
Optionally, the setting the second compensation parameter of the sub-pixel of each edge under different display brightness values according to the reference display brightness value and the first compensation parameter includes:
determining a second compensation coefficient between the compensation value of the sub-pixel of each edge under the reference display brightness value and the compensation value between other display brightness values under the same gray scale;
and determining the second compensation coefficient as the second compensation parameter.
An embodiment of the second aspect of the present invention further provides a device for compensating color shift of an edge of a display panel, where the device includes:
the determining module is used for determining registers corresponding to sub-pixels of different colors of each of four edges of the color block when detecting that a picture to be displayed of the display panel contains the color block;
and the compensation module is used for carrying out pixel compensation on the corresponding sub-pixels by utilizing the compensation parameters prestored in the register.
Optionally, the compensation module includes:
an obtaining unit, configured to obtain a display luminance value of the display panel and gray-scale information of sub-pixels of the same color on the same edge of the color block in the picture to be displayed;
a target compensation parameter unit, configured to determine a target compensation parameter from compensation parameters prestored in the register according to the display brightness value and the gray scale information;
and the compensation unit is used for compensating the corresponding sub-pixels by utilizing the target compensation parameters.
Optionally, the apparatus further includes:
the first setting module is used for setting first compensation parameters of the sub-pixels of each edge under different gray scales under the reference display brightness value of the display panel;
the second setting module is used for setting second compensation parameters of the sub-pixels of each edge under different display brightness values according to the reference display brightness value and the first compensation parameters;
and the storage module is used for pre-storing the first compensation parameter and the second compensation parameter in corresponding registers.
Optionally, the first setting module includes:
a first setting unit for setting reference compensation values of sub-pixels of each edge under a target gray level;
the first compensation coefficient unit is used for determining a first compensation coefficient between the compensation value and the reference compensation value of the gray scales of 0-255 except for the target gray scale;
and a first compensation parameter unit configured to determine the reference compensation value and the first compensation coefficient as the first compensation parameter.
Optionally, the second setting module includes:
a second compensation coefficient unit for determining a second compensation coefficient between the compensation value of the sub-pixel of each edge under the reference display brightness value and the compensation value between other display brightness values under the same gray scale;
and the second compensation parameter unit is used for determining the second compensation coefficient as the second compensation parameter.
The technical scheme of the invention has the following beneficial effects:
according to the compensation method provided by the embodiment of the invention, different sub-pixels at the edge of the color block are independently regulated and compensated by setting different registers, so that the problem of color cast of the edge can be solved without increasing the cost and the size of a logic board, and the display quality of the display panel is effectively improved.
Drawings
Fig. 1 is a schematic flow chart of a method for compensating color shift of an edge of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a correspondence relationship between registers and sub-pixels according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of compensation values of sub-pixels at different gray levels according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of compensation values of sub-pixels at different display brightness values according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a compensation device for color shift at an edge of a display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Fig. 1 is a flowchart of a method for compensating color shift of an edge of a display panel according to an embodiment of the invention. As shown in fig. 1, the method for compensating color shift of the edge of the display panel in the embodiment of the invention includes the following steps:
step 101: when detecting that a picture to be displayed of the display panel contains color blocks, determining registers corresponding to sub-pixels of different colors of each of four edges of the color blocks;
step 102: and carrying out pixel compensation on the corresponding sub-pixels by utilizing the compensation parameters prestored in the register.
In the above step, each register of the plurality of registers prestores compensation parameters corresponding to sub-pixels of different edges, and when detecting that a next frame of a display panel to be displayed contains a color block, the adjustment and compensation of different sub-pixels of an edge region of the color block can be realized by acquiring the compensation parameters of the register corresponding to the sub-pixel of each edge of the color block, thereby solving the problem of edge color shift.
That is, in the embodiment of the invention, by setting different registers to individually adjust and compensate different sub-pixels at the edge of the color block on the display panel, the problem of color cast of the edge can be solved without increasing the cost and the size of the logic board.
In the embodiment of the invention, the picture to be displayed of the display panel contains color blocks, namely the next frame of the picture to be displayed of the display panel contains color blocks. For the color lump, a part of display area of the display panel can be occupied, and the whole display area of the display panel can also be occupied; the color block may be defined as a solid color region in the picture to be displayed, or a block diagram with a boundary, for example, the picture content of a black matrix and a white frame, or the picture content of a white matrix and a black frame. The sub-pixels of the color block edge, that is, the sub-pixels of the display panel for displaying the edge of the color block to be displayed, where the edge of the color block may include an upper edge, a lower edge, a left edge, and a right edge, and when the color block occupies a part of the display area of the display panel, the sub-pixels of the color block edge, that is, at least one circle of pixels of the color block edge area; when the color block occupies the whole display area of the display panel, for example, full-screen pure color, the sub-pixels at the edge of the color block, that is, at least one circle of pixels at the edge of the display panel, the specific circle number of the sub-pixels at the edge of the color block to be compensated can be determined according to the actual display requirement, and can be one circle, two circles or even multiple circles.
Please refer to fig. 2, which is a schematic diagram illustrating a correspondence relationship between registers and sub-pixels according to an embodiment of the present invention. As shown in fig. 2, in some embodiments of the present invention, the number of registers is 12, denoted as Rt, gt, bt, rb, gb, bb, rl, gl Bl, rr, gr, br, respectively, and the register Rt is used to compensate the red sub-pixel at the upper edge of the color block, and the register Br is used to compensate the blue sub-pixel at the right edge of the color block. Therefore, the 12 registers correspondingly compensate the sub-pixels with different colors of each of the four edges of the color block, so that the aim of eliminating the edge color shift can be achieved.
In some embodiments of the present invention, the performing pixel compensation on the corresponding sub-pixels using the compensation parameters pre-stored in the register includes:
acquiring the display brightness value of the display panel and the gray scale information of the same-color sub-pixels on the same edge of the color block in the picture to be displayed;
determining a target compensation parameter from compensation parameters prestored in the register according to the display brightness value and the gray scale information;
and compensating the corresponding sub-pixels by using the target compensation parameters.
That is, the compensation parameters pre-stored in the register include compensation parameters of sub-pixels under different display brightness values and different gray scales, when the compensation parameters pre-stored in the register are used to perform pixel compensation on the corresponding sub-pixels, the display brightness value of the display panel and gray scale information of sub-pixels of the same color for displaying the edge of the color block in the picture to be displayed need to be obtained first, then compensation parameters corresponding to the corresponding display brightness value and gray scale value are found from the compensation parameters stored in the register, that is, the compensation parameters are target compensation parameters, and finally the corresponding sub-pixels are compensated by using the target compensation parameters.
In some embodiments of the present invention, before the pixel compensation is performed on the corresponding sub-pixel by using the compensation parameter pre-stored in the register, the method further includes:
setting first compensation parameters of sub-pixels of each edge under different gray scales under a reference display brightness value of the display panel;
setting second compensation parameters of sub-pixels of each edge under different display brightness values according to the reference display brightness value and the first compensation parameters;
the first compensation parameter and the second compensation parameter are pre-stored in corresponding registers.
The display brightness value, i.e. display brightness value, abbreviated as DBV, is currently adjustable. Therefore, first, setting first compensation parameters of sub-pixels of each edge of a color block under different gray scales under the reference display brightness value of the display panel; then, under different display brightness values, as the brightness of the display panel changes, the display effect will be different when the same picture is displayed, so that in order to make up for the difference, the compensation parameters of the sub-pixels also need to be correspondingly adjusted, that is, the second compensation parameters of the sub-pixels at each edge under different display brightness values are set according to the reference display brightness value and the first compensation parameters; and compensating the sub-pixels under any display brightness value and any gray scale according to the first compensation parameter and the second compensation parameter.
In some embodiments of the present invention, setting the first compensation parameter of the sub-pixel of each edge at different gray scales at the reference display brightness value of the display panel includes:
setting reference compensation values of sub-pixels of each edge under the target gray scale;
determining a first compensation coefficient between the compensation value and the reference compensation value of the gray scales of 0-255 except the target gray scale;
the reference compensation value and the first compensation coefficient are determined as the first compensation parameter.
Fig. 3 is a schematic diagram of compensation values of sub-pixels at different gray scales according to an embodiment of the present invention. Optionally, when the first compensation parameters of the sub-pixels at the edges under different gray scales are set under the reference display brightness value of the display panel, the reference compensation value of the sub-pixels at the edges under the target gray scales can be set first, for example, the compensation value of the red sub-pixel at the upper edge under 255 gray scales is set, the compensation value of the blue sub-pixel at the right edge under 255 gray scales is set, after the reference compensation value of each color sub-pixel at the target gray scales at each edge is determined, the first compensation coefficient between the compensation values and the reference compensation values at other gray scales except the target gray scales in the 0-255 gray scales can be determined by taking the reference compensation value at the target gray scales as the reference, that is, each gray scale corresponds to one first compensation coefficient, and the compensation value at the corresponding gray scales can be obtained by multiplying the corresponding first compensation coefficient by the reference compensation value. In some alternative embodiments, in order to consider the size of the storage space, a specific number of gray scales may be selected to set the first compensation coefficient, for example, 255 gray scales, 192 gray scales, 128 gray scales, 64 gray scales, etc., and for the first compensation coefficient of other gray scales, the first compensation coefficient of other gray scales may be determined by a linear interpolation method, for example, ogs_220= (ogs_255-ogs_192) ×35/63, that is, the first compensation coefficient of 220 gray scales may be calculated by the first compensation coefficient corresponding to 255 gray scales and 192 gray scales, so that edge compensation of different gray scales may be achieved.
In other embodiments of the present invention, the setting the second compensation parameter of the sub-pixel of each edge at different display brightness values according to the reference display brightness value and the first compensation parameter includes:
determining a second compensation coefficient between the compensation value of the sub-pixel of each edge under the reference display brightness value and the compensation value between other display brightness values under the same gray scale;
and determining the second compensation coefficient as the second compensation parameter.
Fig. 4 is a schematic diagram showing compensation values of sub-pixels with different display brightness values according to an embodiment of the present invention. In the embodiment of the invention, optionally, after determining the first compensation parameters of the sub-pixels of each edge under the reference display brightness value under different gray scales, the second compensation coefficient between the compensation value of each sub-pixel of each edge under the reference display brightness value and the compensation value between the sub-pixels of each edge under other display brightness values can be further determined by debugging, that is, each display brightness value corresponds to one second compensation coefficient, and the compensation value under a certain gray scale is multiplied by the corresponding second compensation coefficient to obtain the compensation value under the same gray scale of the corresponding display brightness value. As shown in fig. 4, each curve represents the variation of the compensation value with gray scale at different display brightness values. Therefore, according to the second compensation parameter, the sub-pixel at any display brightness value can be compensated.
According to the compensation method provided by the embodiment of the invention, different sub-pixels at the edge of the color block are independently regulated and compensated by setting different registers, so that the problem of color cast of the edge can be solved without increasing the cost and the size of a logic board, and the display quality of the display panel is effectively improved.
It should be noted that, in the method for compensating for edge color shift of a display panel provided in the embodiment of the present invention, the execution body may be a device for compensating for edge color shift of a display panel, or a control module for executing the method for compensating for edge color shift of a display panel in the device for compensating for edge color shift of a display panel. In the embodiment of the invention, the compensation device for the edge color shift of the display panel provided by the embodiment of the invention is described by taking the method for executing the compensation method for the edge color shift of the display panel as an example.
Fig. 5 is a schematic structural diagram of a display panel edge color shift compensation device according to an embodiment of the present invention. As shown in fig. 5, in the embodiment of the present invention, the compensation device 50 includes:
a determining module 51, configured to determine, when detecting that a picture to be displayed of the display panel includes a color patch, a register corresponding to a subpixel of a different color of each of four edges of the color patch;
and the compensation module 52 is used for performing pixel compensation on the corresponding sub-pixels by using the compensation parameters prestored in the register.
In the embodiment of the invention, different sub-pixels at the edge of the color block on the display panel are independently regulated and compensated by setting different registers, so that the problem of color cast of the edge can be solved without increasing the cost and the size of a logic board.
In some embodiments of the invention, optionally, the compensation module comprises:
an obtaining unit, configured to obtain a display luminance value of the display panel and gray-scale information of sub-pixels of the same color on the same edge of the color block in the picture to be displayed;
a target compensation parameter unit, configured to determine a target compensation parameter from compensation parameters prestored in the register according to the display brightness value and the gray scale information;
and the compensation unit is used for compensating the corresponding sub-pixels by utilizing the target compensation parameters.
Optionally, the compensation device further includes:
the first setting module is used for setting first compensation parameters of the sub-pixels of each edge under different gray scales under the reference display brightness value of the display panel;
the second setting module is used for setting second compensation parameters of the sub-pixels of each edge under different display brightness values according to the reference display brightness value and the first compensation parameters;
and the storage module is used for pre-storing the first compensation parameter and the second compensation parameter in corresponding registers.
Optionally, the first setting module includes:
a first setting unit for setting reference compensation values of sub-pixels of each edge under a target gray level;
the first compensation coefficient unit is used for determining a first compensation coefficient between the compensation value and the reference compensation value of the gray scales of 0-255 except for the target gray scale;
and a first compensation parameter unit configured to determine the reference compensation value and the first compensation coefficient as the first compensation parameter.
Optionally, the second setting module includes:
a second compensation coefficient unit for determining a second compensation coefficient between the compensation value of the sub-pixel of each edge under the reference display brightness value and the compensation value between other display brightness values under the same gray scale;
and the second compensation parameter unit is used for determining the second compensation coefficient as the second compensation parameter.
The compensation device provided by the embodiment of the present invention can implement each process implemented by the embodiments of the methods of fig. 1 to fig. 4, and in order to avoid repetition, a detailed description is omitted here.
While the foregoing is directed to embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present invention, and it is intended to cover the scope of the invention as defined in the appended claims.
Claims (8)
1. The method for compensating the color cast of the edge of the display panel is characterized by comprising the following steps of:
when detecting that a picture to be displayed of the display panel contains color blocks, determining registers corresponding to sub-pixels of different colors of each of four edges of the color blocks;
performing pixel compensation on the corresponding sub-pixels by using the compensation parameters prestored in the register;
the number of the registers is 12, wherein 12 registers correspondingly compensate the sub-pixels with different colors at each of the four edges of the color block;
the pixel compensation for the corresponding sub-pixels by using the compensation parameters prestored in the register comprises the following steps:
acquiring the display brightness value of the display panel and the gray scale information of the same-color sub-pixels on the same edge of the color block in the picture to be displayed;
determining a target compensation parameter from compensation parameters prestored in the register according to the display brightness value and the gray scale information;
and compensating the corresponding sub-pixels by using the target compensation parameters.
2. The method of claim 1, wherein prior to pixel compensating the corresponding sub-pixel with the pre-stored compensation parameters of the register, further comprising:
setting first compensation parameters of sub-pixels of each edge under different gray scales under a reference display brightness value of the display panel;
setting second compensation parameters of sub-pixels of each edge under different display brightness values according to the reference display brightness value and the first compensation parameters;
the first compensation parameter and the second compensation parameter are pre-stored in corresponding registers.
3. The method of claim 2, wherein setting the first compensation parameter for the sub-pixels of each edge at different gray scales at the reference display luminance value of the display panel comprises:
setting reference compensation values of sub-pixels of each edge under the target gray scale;
determining a first compensation coefficient between the compensation value and the reference compensation value of the gray scales of 0-255 except the target gray scale;
the reference compensation value and the first compensation coefficient are determined as the first compensation parameter.
4. A method according to claim 3, wherein said setting the second compensation parameter for each edge sub-pixel at different display luminance values based on said reference display luminance value and said first compensation parameter comprises:
determining a second compensation coefficient between the compensation value of the sub-pixel of each edge under the reference display brightness value and the compensation value between other display brightness values under the same gray scale;
and determining the second compensation coefficient as the second compensation parameter.
5. A compensation device for color shift of an edge of a display panel, comprising:
the determining module is used for determining registers corresponding to sub-pixels of different colors of each of four edges of the color block when detecting that a picture to be displayed of the display panel contains the color block;
the compensation module is used for carrying out pixel compensation on the corresponding sub-pixels by utilizing the compensation parameters prestored in the register;
the number of the registers is 12, wherein 12 registers correspondingly compensate the sub-pixels with different colors at each of the four edges of the color block;
the compensation module includes:
an obtaining unit, configured to obtain a display luminance value of the display panel and gray-scale information of sub-pixels of the same color on the same edge of the color block in the picture to be displayed;
a target compensation parameter unit, configured to determine a target compensation parameter from compensation parameters prestored in the register according to the display brightness value and the gray scale information;
and the compensation unit is used for compensating the corresponding sub-pixels by utilizing the target compensation parameters.
6. The apparatus as recited in claim 5, further comprising:
the first setting module is used for setting first compensation parameters of the sub-pixels of each edge under different gray scales under the reference display brightness value of the display panel;
the second setting module is used for setting second compensation parameters of the sub-pixels of each edge under different display brightness values according to the reference display brightness value and the first compensation parameters;
and the storage module is used for pre-storing the first compensation parameter and the second compensation parameter in corresponding registers.
7. The apparatus of claim 6, wherein the first setting module comprises:
a first setting unit for setting reference compensation values of sub-pixels of each edge under a target gray level;
the first compensation coefficient unit is used for determining a first compensation coefficient between the compensation value and the reference compensation value of the gray scales of 0-255 except for the target gray scale;
and a first compensation parameter unit configured to determine the reference compensation value and the first compensation coefficient as the first compensation parameter.
8. The apparatus of claim 7, wherein the second setting module comprises:
a second compensation coefficient unit for determining a second compensation coefficient between the compensation value of the sub-pixel of each edge under the reference display brightness value and the compensation value between other display brightness values under the same gray scale;
and the second compensation parameter unit is used for determining the second compensation coefficient as the second compensation parameter.
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