CN117524047A - Display device and row overdrive method thereof - Google Patents
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0252—Improving the response speed
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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
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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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
- G09G2320/04—Maintaining the quality of display appearance
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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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
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
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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
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
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Abstract
The application discloses a display device and a line overdrive method thereof, wherein the line overdrive method obtains the gray scale value of each target overdrive pixel in a defect line overdrive array area through a nonlinear interpolation method instead of the traditional linear interpolation method, so that the adoption of a target line overdrive table not only can carry out better nonlinear compensation on the brightness of each pixel in the defect display area to improve the brightness uniformity, but also can save the logic resource quantity and the storage resource quantity occupied by the line overdrive method because the part outside the defect line overdrive array area in the target line overdrive table is still realized through the traditional linear interpolation.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device and a driving method thereof.
Background
As resolution and/or refresh frequency increases, the charging time of individual pixels in a display device is also shorter and shorter, and for this reason, charge compensation is generally performed by a line overdrive (LOD, line Over Driving) method.
However, the line overdrive Table cannot well meet the compensation requirement, and display defects such as blue sky watermarks and/or green leaf watermarks are likely to occur in a picture.
Disclosure of Invention
The application provides a display device and a row overdrive method thereof, so as to relieve the technical problem that a row overdrive table is difficult to better meet brightness compensation.
In a first aspect, the present application provides a line overdrive method of a display device, the line overdrive method including: controlling the display device to display a corresponding frame picture according to the initial line overdrive table; determining a defect display area according to the frame picture; determining a defect line overdrive array area corresponding to the defect display area based on a mapping relation between the initial line overdrive table and the frame picture, wherein the defect line overdrive array area is a part of the area occupied by the initial line overdrive table; obtaining the gray scale value of each target overdrive pixel in the overdrive array area of the defect line according to a nonlinear interpolation method; replacing each initial overdrive pixel gray level value in the defect line overdrive array area with a corresponding target overdrive pixel gray level value to obtain a target line overdrive table corresponding to the initial line overdrive table; and controlling the display device to display the corresponding frame picture according to the target line overdrive table.
In some embodiments, the step of obtaining the target overdrive pixel gray level values in the defective row overdrive array region according to a nonlinear interpolation method includes: configuring a nonlinear interpolation method to comprise power law transformation; and obtaining the gray scale value of each target overdrive pixel in the overdrive array area of the defect row according to the power law transformation.
In some embodiments, the step of obtaining the target overdrive pixel gray level values in the defective row overdrive array region according to a nonlinear interpolation method includes: configuring a nonlinear interpolation method to comprise a piecewise function; and obtaining the gray scale value of each target overdrive pixel in the overdrive array area of the defect row according to the piecewise function.
In some embodiments, the step of deriving each target overdrive pixel gray level value in the defective row overdrive array region from the piecewise function comprises: determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect line overdrive array area; determining a gray scale distance between a gray scale coordinate where a gray scale value of a target overdrive pixel to be calculated in the defect line overdrive array area is located and a gray scale coordinate of a starting binding point; determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance; and under the condition that the gray-scale distance is smaller than or equal to the first preset gray-scale distance, starting the initial overdrive pixel gray-scale value corresponding to the gray-scale value coordinate of the binding point to be the target overdrive pixel gray-scale value corresponding to the gray-scale value coordinate.
In some embodiments, the step of deriving each target overdrive pixel gray level value in the defective row overdrive array region from the piecewise function comprises: determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect line overdrive array area; determining a gray scale distance between a gray scale coordinate where a gray scale value of a target overdrive pixel to be calculated in the defect line overdrive array area is located and a gray scale coordinate of a starting binding point; determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance; and when the gray scale distance is larger than the second preset gray scale distance, the initial overdrive pixel gray scale value corresponding to the gray scale value coordinate of the ending binding point is the target overdrive pixel gray scale value corresponding to the gray scale value coordinate.
In some embodiments, the step of deriving each target overdrive pixel gray level value in the defective row overdrive array region from the piecewise function comprises: determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect line overdrive array area; determining a gray scale distance between a gray scale coordinate where a gray scale value of a target overdrive pixel to be calculated in the defect line overdrive array area is located and a gray scale coordinate of a starting binding point; determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance; and under the condition that the gray scale distance is larger than the first preset gray scale distance and smaller than or equal to the second preset gray scale distance, obtaining the target overdrive pixel gray scale value corresponding to the gray scale value coordinate based on the initial overdrive pixel gray scale value corresponding to the start binding point gray scale value coordinate, the initial overdrive pixel gray scale value corresponding to the end binding point gray scale value coordinate and the weighting coefficient.
In some embodiments, the step of determining the defect display area according to the frame picture includes: judging whether a frame picture has a defect pattern or not; if the defect pattern exists, determining the rectangular area where the defect pattern exists as a defect display area.
In some embodiments, the step of determining whether the frame picture has a defect pattern further includes: and if the defect pattern does not exist, controlling the display device to display a corresponding frame picture according to the initial line overdrive table.
In a second aspect, the present application provides a display device including a timing controller storing an initial row overdrive table and a target row drive table in the row overdrive method in at least one embodiment described above.
In some embodiments, when the blue sky watermark and/or the green leaf watermark exist in the frame picture, the time sequence controller calls and controls the display device to display the corresponding frame picture according to the target line overdrive table; or when the frame picture does not have the blue sky watermark and/or the green leaf watermark, the time sequence controller calls and controls the display device to display the corresponding frame picture according to the initial line overdrive table; the blue sky watermark is formed by changing the gray scale of red in low gray scale, and the green leaf watermark is formed by changing the gray scale of blue in low gray scale.
According to the display device and the line overdrive method thereof, the display device is controlled to display the corresponding frame picture according to the initial line overdrive table, then the defect display area is determined according to the frame picture, then the defect line overdrive array area corresponding to the defect display area is determined based on the mapping relation between the initial line overdrive table and the frame picture, then the overdrive pixel gray scale value of each target in the defect line overdrive array area is obtained according to the nonlinear interpolation method, then each initial overdrive pixel gray scale value in the defect line overdrive array area is replaced to be the overdrive pixel gray scale value of the corresponding target, so that the line overdrive table corresponding to the initial line overdrive table is obtained, the display device is controlled to display the corresponding frame picture according to the target line overdrive table, and as the overdrive pixel gray scale value of each target in the defect line overdrive array area is obtained through the nonlinear interpolation method instead of the traditional linear interpolation method, the luminance of each pixel in the defect display area can be better nonlinear compensated according to the nonlinear interpolation method, and the luminance of each target pixel in the defect line overdrive array area can be saved by the linear interpolation method, and the storage resources of the traditional line overdrive array area are saved.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display device in the related art.
Fig. 2 is a schematic diagram of another structure of a display device in the related art.
Fig. 3 is a schematic diagram of an initial row overdrive table in the related art.
Fig. 4 is a schematic flow chart of a row overdrive method according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a defective row overdrive array area according to an embodiment of the present application.
Fig. 6 is a schematic flow chart of another method for driving a row in accordance with an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like, may explicitly or implicitly include one or more of such features, and in the description of the present invention, "a plurality" means two or more, unless otherwise specifically limited.
In the industry, a display panel with a large Ultra Definition (UD) resolution is generally designed by using a normal gate architecture (1G 1D) shown in fig. 1. However, the Tri-gate (Tri-gate) architecture shown in fig. 2, which requires only 4 source ICs, has a cost advantage over the normal gate architecture, which requires 12 source ICs 1, and thus the industry is gradually put into developing the Tri-gate architecture as a low cost solution. The UD Tri-gate extremely structured product can lead industry technology and realize extremely low cost.
However, under the same condition, taking a 4K panel with 60Hz as an example, the charging time of a single pixel in a normal gate structure is 7.5us, the charging time of a single pixel in a tri-gate structure is only 1/3 of that of the normal gate structure, and the charging time is about 2.5us, so that the charging time is seriously insufficient.
Each source driver chip 1 typically has 960 output pins, each of which can provide a corresponding data signal.
Therefore, in order to solve the problem of the insufficient charging caused by the high resolution and/or the high refresh frequency, a charging compensation method such as adding an overdrive (LOD, line Over Driving) to a timing controller (Tcon) or a system on a chip (SOC) is generally adopted, and when the charging compensation method is turned on, an overdrive Table (LOD Table/LOD LUT) as shown in fig. 3 corresponding to the display device needs to be written, so as to compensate the video signal in real time, and improve the display image quality of the display device.
The above-mentioned row overdrive table mostly adopts n x n specification, n is the number of gray scale binding points, and n is generally an integer number of 9, 17, 19, etc. The number 17 is the number of the main stream gray scale binding points, namely 256 gray scales are equally divided into 16 parts, and two-dimensional linear interpolation is performed on the gray scales of other non-binding points to realize charging compensation.
Taking an 8-bit display picture as an example, the gray scale combination of the previous row and the current row is 256 times 256=65536; generally, tcon or SOC needs to consider the factors of cost such as logic resource amount and storage resource amount occupied by algorithm, so that a one-to-one 256×256 specification is not adopted. However, for a display device with poor charging, the linear interpolation row overdrive table cannot well compensate for the gray scale of the non-binding point, and especially, the low gray scale has higher compensation requirement, and the brightness compensation trend is nonlinear. Thus, the image quality problems such as blue sky watermarks and green leaf watermarks are easily caused.
In view of the above-mentioned technical problem that the overdrive table is difficult to better satisfy brightness compensation, the present embodiment provides an overdrive method of a display device, referring to fig. 3 to 6, as shown in fig. 4, the overdrive method includes the following steps:
step S10: and controlling the display device to display the corresponding frame picture according to the initial line overdrive table.
Step S20: and determining a defect display area according to the frame picture.
Step S30: and determining a defect line overdrive array area corresponding to the defect display area based on the mapping relation between the initial line overdrive table and the frame picture, wherein the defect line overdrive array area is a part of the area occupied by the initial line overdrive table.
Step S40: and obtaining the gray scale value of each target overdrive pixel in the overdrive array region of the defect line according to a nonlinear interpolation method.
Step S50: and replacing each initial overdrive pixel gray level value in the defect line overdrive array area with a corresponding target overdrive pixel gray level value to obtain a target line overdrive table corresponding to the initial line overdrive table.
Step S60: and controlling the display device to display the corresponding frame picture according to the target line overdrive table.
It can be understood that in the line overdrive method provided in this embodiment, the display device is controlled to display the corresponding frame picture according to the initial line overdrive table, then the defect display area is determined according to the frame picture, then the defect line overdrive array area corresponding to the defect display area is determined based on the mapping relation between the initial line overdrive table and the frame picture, then the overdrive pixel gray scale value of each target in the defect line overdrive array area is obtained according to the nonlinear interpolation method, then each initial overdrive pixel gray scale value in the defect line overdrive array area is replaced to be the corresponding target overdrive pixel gray scale value, so as to obtain the target line overdrive table corresponding to the initial line overdrive table, the display device is controlled to display the corresponding frame picture according to the target line overdrive table, and since each target overdrive pixel gray scale value in the defect line overdrive array area is obtained by the nonlinear interpolation method instead of the traditional linear interpolation method, the luminance of each target pixel in the defect display area can be better nonlinear compensated by adopting the target line overdrive table, and the luminance of each target pixel in the defect display area can be further improved by the linear interpolation method, and the target line overdrive area occupies a part of the conventional linear interpolation method, and the storage resources of the target line overdrive area can be saved.
It should be noted that, in the initial row overdrive table in this embodiment, as shown in fig. 3, only the initial overdrive pixel gray-scale values corresponding to the gray-scale binding point values are calculated one-to-one, and the initial overdrive pixel gray-scale values corresponding to the non-gray-scale binding point values are obtained by linear interpolation.
In the process of displaying according to the accessed video signal, although the initial overdrive table is executed, since the overdrive pixel gray scale values corresponding to the non-binding point gray scales in the initial overdrive table are obtained through linear interpolation, blue sky watermarks and/or green leaf watermarks exist in some frame pictures. The blue sky watermark and/or the green leaf watermark are/is the defect display area.
Since the frame is presented after the full gray level compensation by the initial overdrive table, a unique mapping area exists between the frame and the initial overdrive table, for example, in the case of low gray level, a defect display area is easy to appear, and accordingly, the low gray level area of the initial overdrive table can be determined to be the defect row overdrive array area. The defect row overdrive array region may be, for example, a region surrounded by four points A, B, C, D in fig. 5, and specifically, the defect row overdrive array region may be determined by two points in a diagonal distribution A, C, or may be determined by two points in a diagonal distribution B, D.
In fig. 4, PRE and CUR sequentially represent the gray-scale value of the previous row and the gray-scale value of the current row, respectively. The coordinates of the point a may be (16, 96), the coordinates of the point B may be (32, 96), the coordinates of the point C may be (32, 112), and the coordinates of the point D may be (16, 112).
In one embodiment, the step of obtaining the target overdrive pixel gray level values in the overdrive array region of the defective row according to the nonlinear interpolation method includes: configuring a nonlinear interpolation method to comprise power law transformation; and obtaining the gray scale value of each target overdrive pixel in the overdrive array area of the defect row according to the power law transformation.
In this embodiment, the power law transformation not only can play a role in enhancing an image, but also can obtain the gray scale value of each target overdrive pixel obtained by a nonlinear interpolation method in the overdrive array region of the defect row, so that the nonlinear brightness variation trend in the defect display region can be better compensated, and bad displays such as blue-sky watermarks or green-leaf watermarks can be improved or eliminated.
In one embodiment, the step of obtaining the target overdrive pixel gray level values in the overdrive array region of the defective row according to the nonlinear interpolation method includes: configuring a nonlinear interpolation method to comprise a piecewise function; and obtaining the gray scale value of each target overdrive pixel in the overdrive array area of the defect row according to the piecewise function.
In this embodiment, the piecewise function may obtain the overdrive pixel gray scale values corresponding to different targets through different functions in different intervals, so that the overdrive pixel gray scale values of each target in the defect line overdrive array area are also avoided from being obtained through traditional linear interpolation, and thus the nonlinear brightness variation trend in the defect display area can be better compensated, so as to improve or eliminate bad displays such as blue-sky watermarks or green-leaf watermarks, and further improve the brightness compensation effect.
In one embodiment, the step of obtaining the target overdrive pixel gray level values in the overdrive array region of the defective row according to the piecewise function includes: determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect line overdrive array area; determining a gray scale distance between a gray scale coordinate where a gray scale value of a target overdrive pixel to be calculated in the defect line overdrive array area is located and a gray scale coordinate of a starting binding point; determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance; and under the condition that the gray-scale distance is smaller than or equal to the first preset gray-scale distance, starting the initial overdrive pixel gray-scale value corresponding to the gray-scale value coordinate of the binding point to be the target overdrive pixel gray-scale value corresponding to the gray-scale value coordinate.
Note that, the start binding point gray scale coordinates are (X0, Y0), for example, the a point coordinates are (16, 96), and the end binding point gray scale coordinates are (X1, Y1), for example, the C point coordinates are (32, 112); alternatively, the start binding point gray scale coordinates are (X0, Y0), e.g., the B point coordinates are (32, 96), and the end binding point gray scale coordinates are (X1, Y1), e.g., the D point coordinates are (16, 112).
The gray scale value coordinates where the gray scale value of the target overdrive pixel to be calculated in the defect row overdrive array area is located may be (X, Y), and the gray scale distance Δval is as follows:
the first preset gray-scale distance is represented by m, the second preset gray-scale distance is represented by n, and the first preset gray-scale distance and the second preset gray-scale distance are natural numbers larger than 0.
Initial overdrive pixel gray scale value corresponding to gray scale value coordinate of starting binding point is LOD 0 Representing the target overdrive pixel gray level value in LOD final 。
In one embodiment, the step of obtaining the target overdrive pixel gray level values in the overdrive array region of the defective row according to the piecewise function includes: determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect line overdrive array area; determining a gray scale distance between a gray scale coordinate where a gray scale value of a target overdrive pixel to be calculated in the defect line overdrive array area is located and a gray scale coordinate of a starting binding point; determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance; and when the gray scale distance is larger than the second preset gray scale distance, the initial overdrive pixel gray scale value corresponding to the gray scale value coordinate of the ending binding point is the target overdrive pixel gray scale value corresponding to the gray scale value coordinate.
It should be noted that, the initial overdrive pixel gray-scale value corresponding to the gray-scale value coordinate of the ending binding point is LOD 1 Representing the target overdrive pixel gray level value in LOD final 。
In one embodiment, the step of obtaining the target overdrive pixel gray level values in the overdrive array region of the defective row according to the piecewise function includes: determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect line overdrive array area; determining a gray scale distance between a gray scale coordinate where a gray scale value of a target overdrive pixel to be calculated in the defect line overdrive array area is located and a gray scale coordinate of a starting binding point; determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance; and under the condition that the gray scale distance is larger than the first preset gray scale distance and smaller than or equal to the second preset gray scale distance, obtaining the target overdrive pixel gray scale value corresponding to the gray scale value coordinate based on the initial overdrive pixel gray scale value corresponding to the start binding point gray scale value coordinate, the initial overdrive pixel gray scale value corresponding to the end binding point gray scale value coordinate and the weighting coefficient.
It should be noted that, in the defect row overdrive array region, the overdrive pixel gray-scale value LOD of the target corresponding to the gray-scale value coordinate is obtained final The method can be calculated by the following formula:
wherein ra is a weighting coefficient, and is greater than 0 and less than 1.
In one embodiment, the step of determining the defect display area according to the frame picture includes: judging whether a frame picture has a defect pattern or not; if the defect pattern exists, determining the rectangular area where the defect pattern exists as a defect display area.
It should be noted that, since the area where the defect pattern is located is generally in an irregular shape, the data volume for determining the defect display area is increased, so in this embodiment, the rectangular area where the defect pattern is located is used as the defect display area, and the rectangular area can be determined only through two diagonal points, so that the defect display area is determined based on the rectangular area, which can also save some workload.
In one embodiment, the step of determining whether the frame picture has a defect pattern further includes: and if the defect pattern does not exist, controlling the display device to display a corresponding frame picture according to the initial line overdrive table.
It should be noted that, if no defect pattern exists, it is noted that the compensation effect of the initial line overdrive table can already meet the requirement of brightness display, so the display device is still controlled to display the corresponding frame picture according to the initial line overdrive table, and because the initial overdrive pixel gray scale value corresponding to the non-binding point gray scale in the initial line overdrive table is realized through linear interpolation, the logic resource amount and the storage resource amount occupied by the line overdrive method can be saved.
In one embodiment, the present embodiment provides a display device including a timing controller storing an initial row overdrive table and a target row drive table in the row overdrive method in at least one embodiment described above.
It can be understood that, because the display device provided in this embodiment implements the above-mentioned line overdrive method in at least one embodiment through the timing controller, it is also possible to control the display device to display a corresponding frame according to the initial line overdrive table, then determine the defective display area according to the frame, then determine the defective line overdrive array area corresponding to the defective display area based on the mapping relationship between the initial line overdrive table and the frame, then obtain the overdrive pixel gray level value of each target in the defective line overdrive array area according to the nonlinear interpolation method, then replace each initial overdrive pixel gray level value in the defective line overdrive array area with the overdrive pixel gray level value of the corresponding target to obtain the line overdrive table corresponding to the initial line overdrive table, control the display device to display the corresponding frame according to the target line overdrive table, and since the overdrive pixel gray level value of each target in the defective line overdrive array area is obtained by the nonlinear interpolation method and obtained by the nonlinear interpolation method, it is not only possible to better compensate each target overdrive pixel gray level value in the defective area by using the target line overdrive table, but also to save the linear interpolation resources in the traditional linear interpolation method and save the luminance resources.
The display device may be the driving structure shown in fig. 1 or the driving structure shown in fig. 2. Compared with the driving architecture shown in fig. 1, the driving architecture shown in fig. 2 is better in compensation effect, that is, the more serious the charging is, the more obvious the compensation effect of the driving architecture is.
In one embodiment, when the blue sky watermark and/or the green leaf watermark exist in the frame picture, the time sequence controller calls and controls the display device to display the corresponding frame picture according to the target line overdrive table; or when the frame picture does not have the blue sky watermark and/or the green leaf watermark, the time sequence controller calls and controls the display device to display the corresponding frame picture according to the initial line overdrive table.
As shown in fig. 6, the previous line gray-scale data and the current line gray-scale data are acquired first, and a corresponding initial line overdrive table may be obtained. And then obtaining a frame picture corresponding to the initial line overdrive table, and judging whether the frame picture has a defect pattern, namely a blue sky watermark and/or a green leaf watermark. If a defective pattern exists, the target overdrive table is called. If the defect pattern does not exist, the initial overdrive table is called. And finally, displaying the corresponding frame picture according to the initial overdrive table or the target overdrive table to improve or eliminate the defect pattern.
The blue sky watermark is formed by changing the gray scale of red in low gray scale, and the displayed picture is similar to blue sky and white cloud in color and shape. Green leaf watermarks are formed by changing the gray level of blue in low gray levels, and the displayed picture resembles green leaves in color and shape.
The low gray level may be a gray level of 32 or less. The blue sky watermark or the green leaf watermark formed in this way is clearer, and the improvement effect of the application can be improved.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The display device and the driving method thereof provided by the embodiment of the present application are described in detail, and specific examples are applied to the description of the principles and the implementation manners of the present application, where the description of the above embodiments is only used to help understand the technical solution and the core idea of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A line overdrive method of a display device, the line overdrive method comprising:
controlling the display device to display a corresponding frame picture according to the initial line overdrive table;
determining a defect display area according to the frame picture;
determining a defect line overdrive array area corresponding to the defect display area based on a mapping relation between the initial line overdrive table and the frame picture, wherein the defect line overdrive array area is a part of the area occupied by the initial line overdrive table;
obtaining the gray scale value of each target overdrive pixel in the overdrive array region of the defect line according to a nonlinear interpolation method;
replacing each initial overdrive pixel gray level value in the defect line overdrive array area with the corresponding target overdrive pixel gray level value to obtain a target line overdrive table corresponding to the initial line overdrive table;
and controlling the display device to display a corresponding frame picture according to the target line overdrive table.
2. The method of claim 1, wherein the step of obtaining the target overdrive pixel gray level values in the defective row overdrive array region according to a nonlinear interpolation method comprises:
configuring the nonlinear interpolation method to comprise power law transformation;
and obtaining the gray scale value of each target overdrive pixel in the overdrive array area of the defect row according to the power law transformation.
3. The method of claim 1, wherein the step of obtaining the target overdrive pixel gray level values in the defective row overdrive array region according to a nonlinear interpolation method comprises:
configuring the nonlinear interpolation method to comprise a piecewise function;
and obtaining the gray scale value of each target overdrive pixel in the overdrive array area of the defect row according to the piecewise function.
4. A method of overdrive according to claim 3, wherein the step of deriving respective target overdrive pixel gray levels in the defective row overdrive array area from the piecewise function comprises:
determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect row overdrive array area;
determining a gray scale distance between a gray scale value coordinate of a target overdrive pixel gray scale value to be calculated in the defect line overdrive array region and a gray scale value coordinate of the starting binding point;
determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance;
and under the condition that the gray scale distance is smaller than or equal to the first preset gray scale distance, the initial overdrive pixel gray scale value corresponding to the gray scale value coordinate of the starting binding point is the target overdrive pixel gray scale value corresponding to the gray scale value coordinate.
5. A method of overdrive according to claim 3, wherein the step of deriving respective target overdrive pixel gray levels in the defective row overdrive array area from the piecewise function comprises:
determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect row overdrive array area;
determining a gray scale distance between a gray scale value coordinate of a target overdrive pixel gray scale value to be calculated in the defect line overdrive array region and a gray scale value coordinate of the starting binding point;
determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance;
and under the condition that the gray scale distance is larger than the second preset gray scale distance, the initial overdrive pixel gray scale value corresponding to the gray scale value coordinate of the ending binding point is the target overdrive pixel gray scale value corresponding to the gray scale value coordinate.
6. A method of overdrive according to claim 3, wherein the step of deriving respective target overdrive pixel gray levels in the defective row overdrive array area from the piecewise function comprises:
determining a start binding point gray scale value coordinate and an end binding point gray scale value coordinate which are distributed diagonally in the defect row overdrive array area;
determining a gray scale distance between a gray scale value coordinate of a target overdrive pixel gray scale value to be calculated in the defect line overdrive array region and a gray scale value coordinate of the starting binding point;
determining a first preset gray-scale distance and a second preset gray-scale distance between the gray-scale value coordinates and the gray-scale value coordinates of the starting binding point, wherein the first preset gray-scale distance is smaller than the second preset gray-scale distance;
and under the condition that the gray scale distance is larger than the first preset gray scale distance and smaller than or equal to the second preset gray scale distance, obtaining the target overdrive pixel gray scale value corresponding to the gray scale value coordinate based on the initial overdrive pixel gray scale value corresponding to the start binding point gray scale value coordinate, the initial overdrive pixel gray scale value corresponding to the end binding point gray scale value coordinate and the weighting coefficient.
7. The line overdrive method according to claim 1, wherein the step of determining a defective display area from the frame picture includes:
judging whether the frame picture has a defect pattern or not;
and if the defect pattern exists, determining the rectangular area where the defect pattern exists as the defect display area.
8. The line overdrive method according to claim 7, further comprising, after the step of determining whether the frame picture has a defect pattern:
and if the defect pattern does not exist, controlling the display device to display a corresponding frame picture according to the initial line overdrive table.
9. A display device comprising a timing controller storing the initial row overdrive table and the target row drive table in the row overdrive method according to any one of claims 1 to 8.
10. The display device according to claim 9, wherein the timing controller calls and controls the display device to display a corresponding frame according to the target row overdrive table in case that the frame has a blue-sky watermark and/or a green-leaf watermark;
or when the frame picture does not have the blue sky watermark and/or the green leaf watermark, the time sequence controller calls and controls the display device to display the corresponding frame picture according to the initial line overdrive table;
the blue sky watermark is formed by changing the gray scale of red in low gray scale, and the green leaf watermark is formed by changing the gray scale of blue in low gray scale.
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