CN113284450A - Method and device for compensating color cast of edge of display panel - Google Patents
Method and device for compensating color cast of edge of 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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- 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
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Abstract
The invention provides a method and a device for compensating color cast of an edge of a display panel. The method for compensating the color cast of the edge of the display panel comprises the following steps: when detecting that a to-be-displayed picture of the display panel comprises a color block, determining a register corresponding to a sub-pixel with different colors at each of four edges of the color block; and performing pixel compensation on the corresponding sub-pixels by using the compensation parameters prestored by the register. According to the compensation method provided by the embodiment of the invention, different registers are arranged to independently adjust and compensate different sub-pixels of the color block edge, so that the problem of edge color cast can be solved without increasing the cost and size of a logic board.
Description
Technical Field
The invention relates to the technical field of display, in particular to a method and a device for compensating color cast of the edge of a display panel.
Background
For a middle-sized or large-sized display panel, the arrangement design is generally performed in a real RGB manner due to its low PPI (pixel density). However, since a medium-sized and large-sized product has high requirements for lifetime, residual image, and the like, when designing the arrangement of the sub-pixels, it is considered that the design is not performed in a standard manner like an LCD (Liquid Crystal Display) product, but performed in an irregular manner.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for compensating color shift at an edge of a display panel, which can solve the problem in the prior art that color shift occurs at an edge of a color block due to irregular arrangement of sub-pixels of the display panel.
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 cast of an edge of a display panel, where the method includes:
when detecting that a to-be-displayed picture of the display panel comprises a color block, determining a register corresponding to a sub-pixel with different colors at each of four edges of the color block;
and performing pixel compensation on the corresponding sub-pixels by using the compensation parameters prestored by the register.
Optionally, the performing, by using the compensation parameter pre-stored in the register, pixel compensation on the corresponding sub-pixel includes:
acquiring the display brightness value of the display panel and gray scale information of the sub-pixels with the same color on the same edge of the color block in the picture to be displayed;
according to the display brightness value and the gray scale information, determining a target compensation parameter from compensation parameters prestored in the register;
and compensating the corresponding sub-pixel by using the target compensation parameter.
Optionally, before performing pixel compensation 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 at each edge under different gray scales under the reference display brightness value of the display panel;
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 parameter;
and pre-storing the first compensation parameter and the second compensation parameter in corresponding registers.
Optionally, the setting of the first compensation parameter of the sub-pixel of each edge under different gray scales under the reference display luminance value of the display panel includes:
setting a reference compensation value of each edge sub-pixel under a target gray scale;
determining a first compensation coefficient between a compensation value and a reference compensation value under other gray scales except the target gray scale in the 0-255 gray scales;
determining the reference compensation value and the first compensation coefficient as the first compensation parameter.
Optionally, the setting, according to the reference display brightness value and the first compensation parameter, a second compensation parameter of each edge sub-pixel under different display brightness values includes:
under the same gray scale, 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 of the sub-pixel under other display brightness values;
determining the second compensation coefficient as the second compensation parameter.
The embodiment of the second aspect of the present invention further provides a device for compensating color cast of an edge of a display panel, the device comprising:
the determining module is used for determining a register corresponding to a sub-pixel with different colors of each edge of four edges of a color block when the condition that a picture to be displayed of the display panel contains the color block is detected;
and the compensation module is used for carrying out pixel compensation on the corresponding sub-pixels by utilizing the compensation parameters prestored by the register.
Optionally, the compensation module includes:
the acquisition unit is used for acquiring the display brightness value of the display panel and the gray scale information of the sub-pixels with the same color on the same edge of the color block in the picture to be displayed;
the target compensation parameter unit is used for determining 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 using the target compensation parameters.
Optionally, the apparatus further comprises:
the first setting module is used for setting first compensation parameters of the sub-pixels at the edges 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 at each edge under different display brightness values according to the reference display brightness value and the first compensation parameter;
and the storage module is used for prestoring the first compensation parameter and the second compensation parameter in corresponding registers.
Optionally, the first setting module includes:
the first setting unit is used for setting the reference compensation value of the sub-pixel of each edge under the target gray scale;
the first compensation coefficient unit is used for determining a first compensation coefficient between a compensation value and a reference compensation value under other gray scales except the target gray scale in the 0-255 gray scales;
a first compensation parameter unit for determining the reference compensation value and the first compensation coefficient as the first compensation parameter.
Optionally, the second setting module includes:
the second compensation coefficient unit is used 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 the sub-pixels under other display brightness values under the same gray scale;
a second compensation parameter unit 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 registers are arranged to independently adjust and compensate different sub-pixels at the edge of the color block, so that the problem of edge color cast can be solved under the condition of not 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 flowchart illustrating a method for compensating color cast of an edge of a display panel according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a corresponding relationship between a register and a sub-pixel according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating compensation values of sub-pixels at different gray levels according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating compensation values of sub-pixels with different display luminance values according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a device for compensating color cast 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 clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Fig. 1 is a schematic flow chart illustrating a method for compensating color cast of an edge of a display panel according to an embodiment of the present invention. As shown in fig. 1, the method for compensating color shift of the edge of the display panel in the embodiment of the present invention includes the following steps:
step 101: when detecting that a to-be-displayed picture of the display panel comprises a color block, determining a register corresponding to a sub-pixel with different colors at each of four edges of the color block;
step 102: and performing pixel compensation on the corresponding sub-pixels by using the compensation parameters prestored by the register.
In the above step, each of the plurality of registers prestores compensation parameters corresponding to sub-pixels at different edges, and when it is detected that a next frame of to-be-displayed picture of the display panel includes a color block, the adjustment and compensation of the different sub-pixels in the edge area of the color block can be realized by obtaining the compensation parameters in the register corresponding to the sub-pixels at each edge of the color block, thereby solving the problem of edge color cast.
That is to say, in the embodiment of the present invention, different registers are set to individually adjust and compensate different sub-pixels of the color block edge on the display panel, so that the problem of edge color cast can be solved without increasing the cost and size of the logic board.
In the embodiment of the invention, the picture to be displayed of the display panel comprises color blocks, namely the picture to be displayed of the next frame of the display panel comprises the color blocks. For the color blocks, a part of the 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 pure color area in the picture to be displayed, or a block diagram with a boundary, such as the picture content of a white frame with a black background, or the picture content of a black frame with a white background. The sub-pixels at the color block edge are the sub-pixels on 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 at the color block edge are at least one circle of pixels in the color block edge area; when the color block occupies the whole display area of the display panel, for example, when the display panel is full-screen and 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, and the specific number of turns of the sub-pixels at the edge of the color block which needs to be compensated may be determined according to the actual display requirement, and may be one circle, two circles or even multiple circles.
Please refer to fig. 2, which is a diagram illustrating a corresponding relationship between a register and a sub-pixel according to an embodiment of the present invention. As shown in fig. 2, in some embodiments of the present invention, the number of the registers is 12, which are respectively denoted as Rt, Gt, Bt, Rb, Gb, Bb, Rl, Gl Bl, Rr, Gr, Br, and illustratively, the register Rt is used for compensating the red sub-pixel at the upper edge of the color block, and the register Br is used for compensating 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 edge of the four edges of the color block, and the aim of eliminating edge color cast can be achieved.
In some embodiments of the present invention, the pixel compensation of the corresponding sub-pixel by using the compensation parameter pre-stored in the register comprises:
acquiring the display brightness value of the display panel and gray scale information of the sub-pixels with the same color on the same edge of the color block in the picture to be displayed;
according to the display brightness value and the gray scale information, determining a target compensation parameter from compensation parameters prestored in the register;
and compensating the corresponding sub-pixel by using the target compensation parameter.
That is to say, the compensation parameters prestored in the register include compensation parameters of sub-pixels with different display luminance values and different gray levels, when the compensation parameters prestored in the register are used to perform pixel compensation on corresponding sub-pixels, it is necessary to first obtain the display luminance value of the display panel and gray level information of the sub-pixels of the same color used for displaying the edge of the color block in the picture to be displayed, then find the compensation parameters corresponding to the corresponding display luminance value and gray level from the compensation parameters stored in the register, which are target compensation parameters, and finally use the target compensation parameters to perform compensation on the corresponding sub-pixels.
In some embodiments of the present invention, before performing pixel compensation 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 at each edge under different gray scales under the reference display brightness value of the display panel;
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 parameter;
and pre-storing the first compensation parameter and the second compensation parameter in corresponding registers.
The display brightness value, namely DBV for short, is adjustable. Therefore, first compensation parameters of sub-pixels at each edge of a color block under different gray scales are set under a reference display brightness value of the display panel; then, under different display brightness values, because the brightness of the display panel changes, the display effect of the display panel will differ when the same picture is displayed, and therefore, in order to compensate for the difference, the compensation parameters of the sub-pixels also need to be adjusted correspondingly, 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 parameter; and according to the first compensation parameter and the second compensation parameter, the sub-pixels under any display brightness value and any gray scale can be compensated.
In some embodiments of the present invention, the setting the first compensation parameter of the sub-pixel of each edge at different gray scales under the reference display brightness value of the display panel includes:
setting a reference compensation value of each edge sub-pixel under a target gray scale;
determining a first compensation coefficient between a compensation value and a reference compensation value under other gray scales except the target gray scale in the 0-255 gray scales;
determining the reference compensation value and the first compensation coefficient as the first compensation parameter.
Please refer to fig. 3, which is a schematic diagram illustrating compensation values of sub-pixels with different gray levels according to an embodiment of the present invention. Optionally, when the first compensation parameters of the sub-pixels at each edge 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 each edge under the target gray scale may be set first, for example, the compensation value of the red sub-pixel at the upper edge under the 255 gray scale is set, the compensation value of the blue sub-pixel at the right edge under the 255 gray scale is set, after the reference compensation value of each color sub-pixel at each edge under the target gray scale is determined, the reference compensation value under the target gray scale may be used as a reference, the first compensation coefficient between the compensation value under the other gray scales except the target gray scale in 0-255 gray scale and the reference compensation value is determined, that is, each gray scale corresponds to one first compensation coefficient, and the compensation value under the corresponding gray scale may be obtained by multiplying the reference compensation value by the corresponding first compensation coefficient. In some alternative embodiments, in order to consider the size of the storage space, certain grayscales may be selected to set the first compensation coefficient, such as 255 grayscales, 192 grayscales, 128 grayscales, 64 grayscales, and the like, and the first compensation coefficient for other grayscales may be determined by linear interpolation, for example, OGS _220 ═ OGS _255-OGS _192 × 35/63, that is, the first compensation coefficient at 220 grayscales may be calculated by the first compensation coefficients corresponding to 255 grayscales and 192 grayscales, so that edge compensation at different grayscales may be implemented.
In other embodiments of the present invention, the setting a second compensation parameter of a sub-pixel at each edge under different display brightness values according to the reference display brightness value and the first compensation parameter includes:
under the same gray scale, 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 of the sub-pixel under other display brightness values;
determining the second compensation coefficient as the second compensation parameter.
Fig. 4 is a schematic diagram of compensation values of sub-pixels with different display luminance values according to an embodiment of the present invention. In the embodiment of the present invention, optionally, after determining the first compensation parameters of the sub-pixels at each edge under the reference display luminance value under different gray scales, a second compensation coefficient between the compensation value of the sub-pixels at each edge under the reference display luminance value and the compensation values between the sub-pixels under other display luminance values under the same gray scale may be further determined by debugging, that is, each display luminance 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 luminance value. As shown in FIG. 4, each curve represents the variation of the compensation value with gray scale for different display brightness values. Therefore, the sub-pixels at any display brightness value can be compensated according to the second compensation parameter.
According to the compensation method provided by the embodiment of the invention, different registers are arranged to independently adjust and compensate different sub-pixels at the edge of the color block, so that the problem of edge color cast can be solved under the condition of not 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 color shift of an edge of a display panel according to the embodiment of the present invention, the execution main body may be a compensation device for color shift of an edge of a display panel, or a control module in the compensation device for color shift of an edge of a display panel, for executing the method for compensating for color shift of an edge of a display panel. The embodiment of the present invention takes the compensation method for performing the color shift compensation on the edge of the display panel by using the compensation device for the color shift on the edge of the display panel as an example, and the compensation device for the color shift on the edge of the display panel provided by the embodiment of the present invention is described.
Fig. 5 is a schematic structural diagram of a compensation apparatus for color cast at an edge of a display panel 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:
the determining module 51 is configured to determine, when it is detected that a to-be-displayed picture of the display panel includes a color block, a register corresponding to a sub-pixel of a different color at each of four edges of the color block;
and the compensation module 52 is configured to perform pixel compensation on the corresponding sub-pixel by using the compensation parameter pre-stored in the register.
In the embodiment of the invention, different registers are arranged to independently adjust and compensate different sub-pixels of the color block edge on the display panel, so that the problem of edge color cast can be solved without increasing the cost and the size of a logic board.
In some embodiments of the present invention, optionally, the compensation module includes:
the acquisition unit is used for acquiring the display brightness value of the display panel and the gray scale information of the sub-pixels with the same color on the same edge of the color block in the picture to be displayed;
the target compensation parameter unit is used for determining 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 using 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 at the edges 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 at each edge under different display brightness values according to the reference display brightness value and the first compensation parameter;
and the storage module is used for prestoring the first compensation parameter and the second compensation parameter in corresponding registers.
Optionally, the first setting module includes:
the first setting unit is used for setting the reference compensation value of the sub-pixel of each edge under the target gray scale;
the first compensation coefficient unit is used for determining a first compensation coefficient between a compensation value and a reference compensation value under other gray scales except the target gray scale in the 0-255 gray scales;
a first compensation parameter unit for determining the reference compensation value and the first compensation coefficient as the first compensation parameter.
Optionally, the second setting module includes:
the second compensation coefficient unit is used 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 the sub-pixels under other display brightness values under the same gray scale;
a second compensation parameter unit 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 method embodiments of fig. 1 to fig. 4, and is not described herein again to avoid repetition.
While the foregoing is directed to embodiments of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and it is intended that all such changes and modifications be considered as within the scope of the invention.
Claims (10)
1. A method for compensating color cast of an edge of a display panel comprises the following steps:
when detecting that a to-be-displayed picture of the display panel comprises a color block, determining a register corresponding to a sub-pixel with different colors at each of four edges of the color block;
and performing pixel compensation on the corresponding sub-pixels by using the compensation parameters prestored by the register.
2. The method of claim 1, wherein the pixel compensating the corresponding sub-pixel by using the compensation parameter pre-stored in the register comprises:
acquiring the display brightness value of the display panel and gray scale information of the sub-pixels with the same color on the same edge of the color block in the picture to be displayed;
according to the display brightness value and the gray scale information, determining a target compensation parameter from compensation parameters prestored in the register;
and compensating the corresponding sub-pixel by using the target compensation parameter.
3. The method according to claim 1, wherein before the pixel compensation of the corresponding sub-pixel by using the compensation parameter pre-stored in the register, the method further comprises:
setting first compensation parameters of sub-pixels at each edge under different gray scales under the reference display brightness value of the display panel;
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 parameter;
and pre-storing the first compensation parameter and the second compensation parameter in corresponding registers.
4. The method of claim 3, wherein setting the first compensation parameter for the sub-pixels of each edge at different gray levels at a reference display luminance value of the display panel comprises:
setting a reference compensation value of each edge sub-pixel under a target gray scale;
determining a first compensation coefficient between a compensation value and a reference compensation value under other gray scales except the target gray scale in the 0-255 gray scales;
determining the reference compensation value and the first compensation coefficient as the first compensation parameter.
5. The method of claim 4, wherein setting the second compensation parameter for the sub-pixels of each edge at different display brightness values according to the reference display brightness value and the first compensation parameter comprises:
under the same gray scale, 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 of the sub-pixel under other display brightness values;
determining the second compensation coefficient as the second compensation parameter.
6. A device for compensating color shift of an edge of a display panel, comprising:
the determining module is used for determining a register corresponding to a sub-pixel with different colors of each edge of four edges of a color block when the condition that a picture to be displayed of the display panel contains the color block is detected;
and the compensation module is used for carrying out pixel compensation on the corresponding sub-pixels by utilizing the compensation parameters prestored by the register.
7. The apparatus of claim 6, wherein the compensation module comprises:
the acquisition unit is used for acquiring the display brightness value of the display panel and the gray scale information of the sub-pixels with the same color on the same edge of the color block in the picture to be displayed;
the target compensation parameter unit is used for determining 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 using the target compensation parameters.
8. The apparatus of claim 6, further comprising:
the first setting module is used for setting first compensation parameters of the sub-pixels at the edges 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 at each edge under different display brightness values according to the reference display brightness value and the first compensation parameter;
and the storage module is used for prestoring the first compensation parameter and the second compensation parameter in corresponding registers.
9. The apparatus of claim 8, wherein the first setup module comprises:
the first setting unit is used for setting the reference compensation value of the sub-pixel of each edge under the target gray scale;
the first compensation coefficient unit is used for determining a first compensation coefficient between a compensation value and a reference compensation value under other gray scales except the target gray scale in the 0-255 gray scales;
a first compensation parameter unit for determining the reference compensation value and the first compensation coefficient as the first compensation parameter.
10. The apparatus of claim 9, wherein the second setup module comprises:
the second compensation coefficient unit is used 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 the sub-pixels under other display brightness values under the same gray scale;
a second compensation parameter unit for determining the second compensation coefficient as the second compensation parameter.
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