CN117153102A - Correction method and device for OLED display screen graph and character edge saw tooth - Google Patents
Correction method and device for OLED display screen graph and character edge saw tooth Download PDFInfo
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The application discloses a correction method and device for OLED display screen graph and character edge saw teeth. According to the application, according to the corresponding relation between the original image topology and the OLED display screen sub-pixel topology, the correct pixel value is distributed for the RGB sub-pixels to be displayed, so that the edge saw-tooth feel phenomenon of the OLED display screen when displaying images or characters is remarkably improved, and the customer visual experience is improved. The application adopts the image interpolation method to correct the pixel value of the sub-pixel, does not change the OLED hardware design, has simple and convenient implementation and low correction cost.
Description
Technical Field
The application belongs to the technical field of OLED display screens. And more particularly, to a method, apparatus, electronic product and computer readable storage medium for correcting OLED display screen graphics and text edge aliasing.
Background
The OLED (Organic Light-Emitting Diode) has been widely used in the fields of computer televisions, mobile phones, head-mounted displays, augmented reality, virtual reality, mixed reality, and the like due to its characteristics of low power consumption, fast response, wide viewing angle, high resolution, wide temperature characteristics, capability of being made into a soft screen, and the like. However, it is also found that when the image normally displayed by the common display is displayed on the OLED, the edges of the graphics or text may generate a jaggy feel or jaggy phenomenon, as shown in fig. 1 and 2. Especially in VR/AR equipment such as head-mounted display, the display screen pixel size is littleer, and the sawtooth sense is more obvious, lets people feel that figure or characters are trembling, seriously influences user's visual experience.
Disclosure of Invention
The application aims to solve the problem that the saw tooth sense of the graph and the character edge of the OLED display screen affects the visual experience of a user, improve the saw tooth sense of the image or the character edge and improve the visual experience of the user of the OLED display screen.
In order to achieve the above object, in a first aspect, the present application provides a method for correcting the graph and text edge saw-tooth of an OLED display screen, including:
acquiring pixel values of pixels in an original image matrix;
for each sub-pixel of the OLED display screen, determining adjacent pixels of the original image matrix in the original image matrix according to the geometric position of the sub-pixel in the original image matrix, performing image interpolation calculation by adopting channel pixel values of the adjacent pixels in the corresponding original image matrix, and taking the channel pixel value at the geometric position obtained by the image interpolation calculation as the channel pixel value after the sub-pixel correction;
and controlling the OLED display screen to display images by adopting the channel pixel value corrected by each sub-pixel.
In some embodiments of the present application, the image interpolation is performed by using all sub-pixels in the same channel as a batch.
In some embodiments of the present application, the arrangement of the sub-pixels of the OLED display screen is hexagonal, staggered rectangular, wall-built, dleta, diamond, BOE, or star.
In some embodiments of the present application, the arrangement of the sub-pixels of the LED display screen is hexagonal, and the adjacent pixels in the original image matrix are 4 pixels immediately adjacent to the adjacent pixels. Further, the image interpolation calculation adopts a bilinear interpolation method.
In some embodiments of the present application, the arrangement of the sub-pixels of the LED display screen is a hexagonal manner, and the adjacent pixels in the original image matrix are 16 pixels in total of 4 rows and 4 columns in close proximity. Further, the image interpolation calculation adopts a bicubic interpolation method.
In a second aspect, the present application provides a correction device for graph and text edge saw teeth of an OLED display screen, including:
an original image acquisition unit for acquiring pixel values of pixels in an original image matrix;
the pixel value correction unit is used for determining adjacent pixels of the original image matrix in the original image matrix according to the geometric position of each sub-pixel of the OLED display screen in the original image matrix, carrying out image interpolation calculation by adopting the channel pixel values of the corresponding adjacent pixels of the original image matrix, and taking the channel pixel value at the geometric position obtained by the image interpolation calculation as the channel pixel value after the correction of the sub-pixel;
and the display control unit is used for controlling the OLED display screen to display images by adopting the channel pixel value corrected by each sub-pixel.
In a third aspect, the present application provides an electronic product, including: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the correction method for OLED display screen graphics and text edge aliasing.
In a fourth aspect, the present application provides a computer readable storage medium storing a computer program, where the computer program when executed by a processor implements the method for correcting the OLED display screen graph and text edge saw-tooth.
Advantageous effects
According to the application, according to the corresponding relation between the original image topology and the OLED display screen sub-pixel topology, the correct pixel value is distributed for the RGB sub-pixels to be displayed, so that the edge saw-tooth feel phenomenon of the OLED display screen when displaying images or characters is remarkably improved, and the customer visual experience is improved. The application adopts the image interpolation method to correct the pixel value of the sub-pixel, does not change the OLED hardware design, has simple and convenient implementation, and has simple method and low correction cost.
Drawings
Fig. 1 is a diagram showing a cross-shaped sawtooth sense example of an OLED display according to an embodiment of the present application.
FIG. 2 is a diagram showing another example of the jaggy feel of the OLED display in accordance with the embodiments of the present application.
FIG. 3 is a flowchart of a method for correcting the edge jaggies of OLED display screen according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a correspondence relationship between an original image topology and an OLED display screen sub-pixel topology in an embodiment of the present application.
Fig. 5 is a schematic diagram illustrating a positional relationship between an original image pixel and an OLED display sub-pixel in an embodiment of the present application.
Fig. 6 is a schematic diagram of sub-pixel value correction in an embodiment of the application.
Fig. 7 is a diagram showing a comparison example of display effects of the front and rear images in the correction according to the embodiment of the present application.
FIG. 8 is a schematic diagram of a sub-pixel arrangement according to an embodiment of the application.
FIG. 9 is a schematic diagram of the device for correcting the edge saw-tooth of OLED display screen according to the embodiment of the application.
Fig. 10 is a schematic diagram of the composition of an electronic product according to an embodiment of the application.
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
The image normally displayed by the common display is changed when displayed on the OLED, and the edges of the graph or the text can generate a saw tooth feel or saw tooth phenomenon. The edges of the graph and the characters shown in fig. 1 and 2 are provided with saw-tooth points, and when the color OLED display displays, a circle of color lamps are hung around the color lamps, and sometimes the lines of the fonts are also perceived to be bent and dithered. Especially in VR/AR equipment such as head-mounted display, the display screen pixel size is littleer, and the sawtooth sense is more obvious, lets people feel that figure or characters are trembling, seriously influences user's visual experience. Therefore, the application provides a correction method and device for the image and text edge saw teeth of an OLED display screen, an electronic product and a computer readable storage medium, and aims to solve the problem that the saw tooth feeling of the image and text edge of the OLED display screen affects the visual experience of a user, improve the saw tooth feeling of the image or text edge and improve the visual experience of the user of the OLED display screen.
As shown in fig. 3, the method for correcting the graph and text edge saw-tooth of the OLED display screen according to an embodiment of the application includes:
acquiring pixel values of pixels in an original image matrix;
for each sub-pixel of the OLED display screen, determining adjacent pixels of the original image matrix in the original image matrix according to the geometric position of the sub-pixel in the original image matrix, performing image interpolation calculation by adopting channel pixel values of the adjacent pixels in the corresponding original image matrix, and taking the channel pixel value at the geometric position obtained by the image interpolation calculation as the channel pixel value after the sub-pixel correction;
and controlling the OLED display screen to display images by adopting the channel pixel value corrected by each sub-pixel.
In some embodiments of the present application, the arrangement of the sub-pixels of the LED display screen is hexagonal, and the adjacent pixels in the original image matrix are 4 pixels immediately adjacent to the adjacent pixels. Further, the image interpolation calculation adopts a bilinear interpolation method.
In some embodiments of the present application, the arrangement of the sub-pixels of the LED display screen is a hexagonal manner, and the adjacent pixels in the original image matrix are 16 pixels in total of 4 rows and 4 columns in close proximity. Further, the image interpolation calculation adopts a bicubic interpolation method.
Specifically, as shown in fig. 4-6, the hexagons are the OLED pixel arrangement and the squares are the ideal display pixel arrangement. For the red, green and blue three channels, all sub-pixels under the same channel are calculated as one batch. For each channel, from any point in the original image, four adjacent pixels V1, V2, V3 and V4 around the current sub-pixel are found, and when the neighbor is missing for the edge pixel, the neighbor is the neighbor. And adopting corresponding channel pixel values (R value, G value or B value) of the four pixels V1, V2, V3 and V4, and then solving the pixel value of the current sub-pixel point according to an image interpolation formula, namely the pixel value of the image under the channel after correction processing.
In this embodiment, the pixels (RGB points) of the original image are overlapped and located at the center points of V1, V2, V3, and V4, and for the OLED display screen, the center points of the three sub-pixels of RGB are marked as the pixel center point of the ideal display.
In fig. 6, x-direction from left to right and y-direction from top to bottom, in the coordinate system with the pixel V1 (0, 0) as the origin, there are, for the odd columns of OLEDs: the coordinates of the center point of the red pass sub-pixel R1 with respect to the pixel V1 (0, 0) are (-1/3, -1/4), the coordinates of the center point of the blue channel B1 sub-pixel with respect to the pixel V1 (0, 0) are (1/3, -1/4), and the coordinates of the center point of the green channel G1 sub-pixel with respect to the pixel V1 (0, 0) are (0, 1/4).
Regarding the above-mentioned linear velocity V4 (-1, 0) as the origin, i.e., pixel V4 (0, 0), there are for the OLED even columns: the center point of the red pass sub-pixel R0 has a coordinate (-1/3, 1/4) with respect to the pixel V4 (0, 0), the center point of the blue pass sub-pixel B0 has a coordinate (1/3, 1/4) with respect to the pixel V4 (0, 0), and the center point of the green sub-pixel G0 has a coordinate (0, -1/4) with respect to the pixel V4 (0, 0).
If no correction is made, the channel pixel values of the pixel V1, i.e. RGB values, are directly assigned to the red sub-pixel R1, the green sub-pixel G1 and the blue sub-pixel B1 when the OLED display screen displays the original image, and in fact, the red sub-pixel R1, the green sub-pixel G1 and the blue sub-pixel B1 have their corresponding positions in the original image matrix and should be obtained by image interpolation calculation from the original image matrix. In some embodiments of the present application, the image interpolation calculation method is a bilinear interpolation method, a bicubic interpolation method or a nearest neighbor interpolation method, and other forms are also possible, but the principle is not changed.
When the bilinear interpolation method is adopted in the embodiments of the present application, for the cases in fig. 4-6, we can consider that the channel pixel value of the sub-pixel is equal to the function f (x, y) related to the position coordinate (x, y) where the center point is located. Taking red pass sub-pixel R1 as an example, R1 is located in a region surrounded by four pixels of adjacent pixels V1, V2, V3, V4 of the original image matrix, and the positions of V1, V2, V3, V4 and the channel pixel values are known. The channel pixel value of R1 is equal to a function f (x, y) related to the position coordinates (x, y) where its center point is located.
When the bilinear interpolation method is adopted, the channel pixel value function f (x, y) =ax+by+c+dxy, four equations are established for the channel pixel values at the adjacent pixels V1 (0, 0), V2 (0, -1), V3 (-1, -1) and V4 (-1, 0) of the original image matrix, and after the four unknowns abcd are obtained, the channel pixel values can be calculated according to the positions of the sub-pixels. For example, the red pass sub-pixel R1 has a pixel value function of f (x, y) = (R) V1 -R V4 )x+(R V1 -R V2 )y+(R V1 +R V3 -R V2 -R V4 )xy+R V1 ，R V1 、R V2 、R V3 、R V4 Red channel pixel values for V1, V2, V3, V4. The value of R1 can be calculated from the position (x, y) of R1. In the same manner, a blue sub-pixel B1, a green sub-pixel G1, a red sub-pixel R0, a green sub-pixel G0, and a red sub-pixel G0 can be obtained,The value of blue subpixel B0.
Further, in order to reduce the calculation amount and improve the efficiency, when the OLED display screen adopts the hexagonal OLED pixel arrangement, for the same pass sub-pixels located in two adjacent rows or two adjacent columns and adjacent to each other, for example, R1 and R2 in fig. 4 and R0 and R1 in fig. 6, image interpolation calculation is performed on the original image matrix adjacent pixels of one sub-pixel, and the channel pixel values of the two sub-pixels obtained by calculation are corrected. The same group of original image matrix adjacent pixels can be used for correcting a plurality of sub-pixels by adopting an image interpolation method. For example, the red pass sub-pixels R0 and R1 are corrected with the same set of original image matrix adjacent pixels V1, V2, V3, V4, in other words, the same set of original image matrix adjacent pixels may be selected for correction based on odd columns (2 n-1 columns) of sub-pixels and even columns (2 n columns) of sub-pixels. Similarly, the odd-numbered (2 n-1 row) sub-pixels and the even-numbered (2 n row) sub-pixels select the same group of adjacent pixels of the original image matrix for correction, so that the calculated amount is reduced, the power consumption is reduced, and the calculation efficiency is improved.
In some embodiments of the present application, for the case of fig. 4-6, the image interpolation calculation may further use bicubic interpolation, where the channel pixel value function is f (x, y) = Σvix w (y), where x is a distance between a center point of the to-be-solved sub-pixel and adjacent pixels of the 16 original image matrix in the x direction, y is a distance between the center point of the to-be-solved sub-pixel and adjacent pixels of the 16 original image matrix in the y direction, vi is a total of 16 adjacent pixels of the original image matrix for 4 rows and 4 columns nearest neighbor around the center point of the to-be-solved sub-pixel, and a side length of each unit cell of the 4 rows and 4 columns is 1.w is a BiCubic function, wherein BiCubic function w (x) is defined as:
the value of a can be minus 0.5.
In some embodiments of the present application, since the number of rows and columns of the processed image matrix are the same as those of the original image matrix, when the processed image is displayed on a common display, the same phenomenon as that seen on the OLED before the appearance of the font edge can be seen, and the effect can be presumed to be the inverse effect of the OLED effect.
FIG. 7 is a diagram showing a comparison example of display effects of images before and after correction according to the present application. As shown in fig. 7, the left side is the display effect without correction, and the right side is the display effect after correction, which are all taken directly by the mobile phone. It can be seen that white spots are apparent to be mixed in the middle of the left font lines, the fonts are white, the lean and curved right fonts are full and round and consistent with the common display feel, and if the OLED screen is directly observed by naked eyes, the effect is more obvious.
In some embodiments of the present application, the geometric arrangement of the sub-pixels of the OLED display is not hexagonal, but is similar to rectangular cross, or similar to the arrangement of the wall-type bricks, as shown in fig. 8, and the method of the present application is still applicable. The common display adopts an RGB pixel arrangement structure, and if the method is adopted for image processing, the image display effect is better. The other diamond, BOE and Huaxing arrangement can have better display effect if the method is adopted for image processing.
In a second aspect, as shown in fig. 9, in an embodiment, the present application provides a correction device for graph and text edge saw teeth of an OLED display screen, including:
an original image acquisition unit for acquiring pixel values of pixels in an original image matrix;
the pixel value correction unit is used for determining adjacent pixels of the original image matrix in the original image matrix according to the geometric position of each sub-pixel in the original image matrix of the OLED display screen, carrying out image interpolation calculation by adopting the channel pixel values of the adjacent pixels in the corresponding original image matrix, and taking the channel pixel value at the geometric position obtained by the image interpolation calculation as the channel pixel value after the sub-pixel correction;
and the display control unit is used for controlling the OLED display screen to display images by adopting the channel pixel value corrected by each sub-pixel.
In a third aspect, the present application provides, in one embodiment, an electronic product in an embodiment, as shown in fig. 10, where the electronic device includes at least one processor, and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method for correcting the OLED display screen graphics and text edge saw-tooth.
Where the memory and the processor are connected by a bus, the bus may comprise any number of interconnected buses and bridges, the buses connecting the various circuits of the one or more processors and the memory together. The bus may also interface various other circuits together, such as peripherals, voltage regulators, and power management circuits, which are well known in the art. The interface provides an interface, e.g., a communication interface, a user interface, between the bus and the transceiver. The transceiver may be one element or may be a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor is transmitted over the wireless medium via the antenna, which further receives the data and transmits the data to the processor.
The processor is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory may be used to store data used by the processor in performing operations.
In a fourth aspect, the present application provides in an embodiment a computer readable storage medium storing a computer program, which when executed by a processor, implements the above-mentioned embodiments of a method for correcting OLED display screen graphics and text edge aliasing.
It will be appreciated by those skilled in the art that the steps of a method of the above embodiments may be performed by hardware associated with a program stored in a storage medium, including instructions for causing a device (which may be a single-chip microcomputer, a chip or the like) or processor (processor) to perform all or part of the steps of the method of the various embodiments of the application. The storage medium includes, but is not limited to, a usb disk, a removable hard disk, a magnetic memory, an optical memory, and other various media capable of storing program codes.
According to the application, according to the corresponding relation between the original image topology and the OLED display screen sub-pixel topology, the correct pixel value is distributed for the RGB sub-pixels to be displayed, so that the edge saw-tooth feel phenomenon of the OLED display screen when displaying images or characters is remarkably improved, and the customer visual experience is improved. The application adopts the image interpolation method to correct the pixel value of the sub-pixel, does not change the OLED hardware design, has simple and convenient implementation and low correction cost.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, or method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules/units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple modules or units may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules or units, which may be in electrical, mechanical or other forms.
The modules/units illustrated as separate components may or may not be physically separate, and components shown as modules/units may or may not be physical modules, i.e., may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules/units may be selected according to actual needs to achieve the objectives of the embodiments of the present application. For example, functional modules/units in various embodiments of the application may be integrated into one processing module, or each module/unit may exist alone physically, or two or more modules/units may be integrated into one module/unit.
Those of ordinary skill would further appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The descriptions of the processes or structures corresponding to the drawings have emphasis, and the descriptions of other processes or structures may be referred to for the parts of a certain process or structure that are not described in detail.
The above embodiments are merely illustrative of the principles of the present application and its effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the application. Accordingly, it is intended that all equivalent modifications and variations of the application be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A correction method for OLED display screen graph and character edge saw-tooth comprises the following steps:
acquiring pixel values of pixels in an original image matrix;
for each sub-pixel of the OLED display screen, determining an original image matrix adjacent pixel in the original image matrix according to the geometric position of the sub-pixel in the original image matrix, performing image interpolation calculation by adopting a channel pixel value of the corresponding original image matrix adjacent pixel, and taking the channel pixel value at the geometric position obtained by the image interpolation calculation as a channel pixel value after correction of the sub-pixel;
and controlling the OLED display screen to display images by adopting the channel pixel value corrected by each sub-pixel.
2. The correction method according to claim 1, wherein,
in the image interpolation calculation, all sub-pixels under the same channel are calculated as one batch.
3. The correction method according to claim 2, wherein,
the arrangement mode of the sub-pixels of the OLED display screen is a hexagonal mode, a staggered rectangular mode, a wall building mode, a dleta mode, a diamond mode, a BOE mode or a Huaxing mode.
4. The correction method according to claim 3, wherein,
the arrangement mode of the sub-pixels of the OLED display screen is a hexagonal mode, and the adjacent pixels in the original image matrix are 4 pixels which are close to each other.
5. The correction method according to claim 4, wherein,
the image interpolation calculation method is a bilinear interpolation method.
6. The correction method according to claim 3, wherein,
the arrangement mode of the sub-pixels of the OLED display screen is a hexagonal mode, and the adjacent pixels in the original image matrix are 4 rows and 4 columns which are adjacent to the adjacent pixels, and the total number of the pixels is 16.
7. The correction method according to claim 4, wherein,
the image interpolation calculation adopts a bicubic interpolation method.
8. A correction device for OLED display screen graphics and text edge aliasing, comprising:
an original image acquisition unit for acquiring pixel values of pixels in an original image matrix;
the pixel value correction unit is used for determining adjacent pixels of the original image matrix in the original image matrix according to the geometric position of each sub-pixel of the OLED display screen in the original image matrix, carrying out image interpolation calculation by adopting the channel pixel values of the corresponding adjacent pixels of the original image matrix, and taking the channel pixel value at the geometric position obtained by the image interpolation calculation as the channel pixel value after the correction of the sub-pixel;
and the display control unit is used for controlling the OLED display screen to display images by adopting the channel pixel value corrected by each sub-pixel.
9. An electronic product, comprising:
at least one processor; the method comprises the steps of,
a memory communicatively coupled to the at least one processor; wherein,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of correcting OLED display screen graphics and text edge serrations as claimed in any one of claims 1 to 7.
10. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the method of correcting for OLED display screen graphics and text edge aliasing of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310961198.9A CN117153102A (en) | 2023-08-01 | 2023-08-01 | Correction method and device for OLED display screen graph and character edge saw tooth |
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