CN112562576B - Display screen optical external compensation method, device and storage medium - Google Patents
Display screen optical external compensation method, device and storage medium Download PDFInfo
- Publication number
- CN112562576B CN112562576B CN202011266786.3A CN202011266786A CN112562576B CN 112562576 B CN112562576 B CN 112562576B CN 202011266786 A CN202011266786 A CN 202011266786A CN 112562576 B CN112562576 B CN 112562576B
- Authority
- CN
- China
- Prior art keywords
- sub
- pixel
- gray scale
- display screen
- brightness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- G09G3/22—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]
-
- 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
- G09G3/22—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]
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3607—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 by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a display screen optical external compensation method, a device and a storage medium, wherein the method comprises the following steps: when a display screen displays a monochrome picture under a preset gray scale, shooting the monochrome picture to generate a corresponding shot image, wherein the plurality of preset gray scales form a gray scale sequence; determining the human eye observation brightness corresponding to each sub-pixel under the preset gray scale according to the original sub-pixel brightness of each sub-pixel in the shot image and a mean square error fitting method; generating a first fitting straight line corresponding to each sub-pixel under the monochrome picture according to the human eye observation brightness respectively corresponding to each sub-pixel under the monochrome picture in the gray scale sequence; and performing data type conversion on the first fitting straight line and storing the converted data to a display screen so as to enable the display screen to perform optical external compensation according to the first fitting straight line. The linear estimation model for the sub-pixel display brightness of the OLED display screen can be provided, so that the display screen can perform optical external compensation during display, and the compensation effect is in accordance with the visual characteristics of human eyes.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a display screen optical external compensation method, a display screen optical external compensation device and a storage medium.
Background
With the continuous development of information Display technology, an OLED (organic light-Emitting Diode) is gradually replacing an LCD (Liquid Crystal Display). In the OLED display screen, because the OLED process is complex and the evaporation process is difficult to achieve very good flatness, the luminance of each sub-pixel varies greatly under the same external conditions and can be perceived by human eyes, i.e., the Mura phenomenon. Therefore, in order to make the display screen display uniformly and stably, each sub-pixel needs to be compensated to reach the panel display standard.
At present, the compensation method of the display screen mainly includes internal compensation and external compensation, and the external compensation can be divided into an optical extraction type and an electrical extraction type according to different extraction methods of brightness data. The existing optical extraction mode generally has two methods, namely a linear interpolation method and a polynomial fitting method, wherein the linear interpolation method has larger error and poorer compensation effect; the polynomial fitting method has high algorithm complexity and is not suitable for being burnt into a driving chip of a display screen for storage. In addition, the amount of data required to be stored in the two methods is large, so that the flash memory is inconvenient to burn in, and after the data is compressed for burning in the flash memory, the actual compensation effect is greatly reduced, the panel display standard cannot be achieved, and the final yield cannot be improved.
Disclosure of Invention
The invention mainly aims to provide a display screen optical external compensation method, a display screen optical external compensation device and a storage medium, and aims to solve the problems of complex algorithm or insufficient effect of the existing optical external compensation method.
In order to achieve the above object, the present invention provides an optical external compensation method for a display screen, comprising the following steps:
when a display screen displays a monochrome picture under a preset gray scale, shooting the monochrome picture to generate a corresponding shot image, wherein the plurality of preset gray scales form a gray scale sequence, and the monochrome picture at least comprises a red picture, a green picture and a blue picture;
acquiring a sub-pixel matrix of a central area of the shot image, and calculating a central area brightness mean value under the preset gray scale according to the original sub-pixel brightness of all sub-pixels in the sub-pixel matrix, wherein the central area brightness mean value corresponding to each preset gray scale in the gray scale sequence forms a central area mean value sequence;
fitting and generating a fitting gamma value corresponding to the monochrome picture by a mean square error fitting method according to the central area mean value sequence and the gray scale sequence;
carrying out inverse gamma transformation according to the fitting gamma value to obtain human eye observation brightness corresponding to each sub-pixel;
according to the preset gray scale of each sub-pixel and the corresponding human eye observation brightness, whether the display brightness of the sub-pixel under the current preset gray scale needs to be adjusted or not can be determined;
generating a first fitting straight line corresponding to each sub-pixel under the monochrome picture according to the human eye observation brightness of each sub-pixel under the monochrome picture in the gray scale sequence;
obtaining a slope value corresponding to the first fitting straight line;
and converting the data type of the slope value from floating point type data into integer type data, and storing the integer type data to the display screen so that the display screen performs optical external compensation according to the first fitted straight line.
Optionally, after the step of obtaining a sub-pixel matrix of a central area of the captured image and calculating a central area luminance mean value under the preset gray scale according to original sub-pixel luminance of all sub-pixels in the sub-pixel matrix, the method further includes:
determining the highest gray scale and the lowest gray scale in the gray scale sequence;
and fitting and generating a fitting gamma value corresponding to the monochrome picture according to the central area brightness mean value of the highest gray scale and the central area brightness mean value of the lowest gray scale.
Optionally, the step of performing inverse gamma transformation according to the fitted gamma value to obtain the observed brightness of the human eye corresponding to each sub-pixel includes:
performing inverse gamma transformation according to the fitting gamma value, the central area brightness mean value corresponding to the highest gray scale in the gray scale sequence and the original sub-pixel brightness of each sub-pixel under the highest gray scale to obtain the human eye observation brightness corresponding to each sub-pixel under the highest gray scale;
and determining the human eye observation brightness corresponding to each sub-pixel under other gray scales in the gray scale sequence according to the human eye observation brightness corresponding to each sub-pixel under the highest gray scale.
Optionally, after the step of determining the human eye observation brightness corresponding to each sub-pixel at other gray levels in the gray level sequence according to the human eye observation brightness corresponding to each sub-pixel at the highest gray level, the method further includes:
and sharpening the human eye observation brightness corresponding to each sub-pixel under the gray-scale sequence by using a Laplace sharpening algorithm.
Optionally, the step of generating a first fitted straight line corresponding to each sub-pixel in the monochrome picture according to the human eye observation brightness respectively corresponding to each sub-pixel in the grayscale sequence in the monochrome picture includes:
determining a coordinate array of preset gray scales and human eye observation brightness in each monochrome picture according to the human eye observation brightness respectively corresponding to each sub-pixel in the gray scale sequence;
and generating a first fitting straight line according to the coordinate array, wherein the first fitting straight line passes through the origin of coordinates.
In addition, to achieve the above object, the present invention further provides a display optical external compensation apparatus, which includes a memory, a processor, and a display optical external compensation program stored in the memory and executable on the processor, wherein: the display screen optical external compensation program, when executed by the processor, implements the steps of the display screen optical external compensation method as described above.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium having stored thereon a display screen optical external compensation program which, when executed by a processor, implements the steps of the display screen optical external compensation method as described above.
According to the optical external compensation method, the optical external compensation device and the storage medium for the display screen, by shooting a single-color picture displayed by the display screen under a preset gray scale, the brightness of an original sub-pixel corresponding to each single-color sub-pixel under the preset gray scale can be obtained according to a shot image, a fitting gamma value under the single-color picture can be generated through mean square error fitting according to the average brightness of the sub-pixels in a central area and a gray scale sequence, and human eye observation brightness corresponding to each single-color sub-pixel in the gray scale sequence is obtained after inverse gamma conversion is carried out on the fitting gamma value. And performing linear fitting on the corresponding relation between the preset gray scale of each single-color sub-pixel and the observation brightness of human eyes to obtain a first fitted straight line corresponding to each single-color sub-pixel under the single-color picture. The first fitting straight lines corresponding to all the sub-pixels in the display screen can be calculated by adjusting the monochrome picture and the preset gray scale. Because the first fitting straight line is stored in the display screen, the storage space occupied by the first fitting straight line is large, the slope value corresponding to the first fitting straight line can be converted into shaping data from floating point data through data type conversion, and therefore a large amount of storage space can be saved while the accuracy of the slope value is not obviously reduced, and the communication time consumed by data transmission can be reduced. After the display screen receives and stores the first fitting straight line corresponding to each sub-pixel, the display screen can perform optical external compensation on the sub-pixel according to the current gray scale of each sub-pixel and the corresponding first fitting straight line when displaying a picture. The embodiment of the invention provides a linear estimation model for the display brightness of the sub-pixels of the OLED display screen, which can accurately estimate the actual display effect of each sub-pixel in different display gray scales, and the display effect accords with the human eye perception characteristic, so that the compensation effect is more fit with the human eye visual characteristic.
Drawings
FIG. 1 is a schematic diagram of an apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a first embodiment of a method for optically compensating for external factors of a display panel according to the present invention;
FIG. 3 is a flow chart of a second embodiment of a method for optically compensating for external factors of a display screen according to the present invention;
FIG. 4 is a detailed flowchart of step S22 in the third embodiment of the method for optically compensating for external factors of a display screen according to the present invention;
FIG. 5 is a flowchart illustrating a step S30 of a fifth embodiment of the method for optically compensating for external factors of a display screen according to the present invention;
FIG. 6 is a graph of the slope value k versus the offset Δ G of the embodiment of FIG. 2.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic diagram of a hardware structure of a display screen optical external compensation device according to an embodiment of the present invention.
The embodiment of the invention relates to a display screen optical external compensation device, which comprises: a processor 1001, such as a CPU, a communication bus 1002, and a memory 1003. Wherein a communication bus 1002 is used to enable connective communication between these components. The memory 1003 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1003 may alternatively be a storage device separate from the processor 1001.
It will be appreciated by those skilled in the art that the terminal structure shown in fig. 1 does not constitute a limitation of the display screen optical external compensation means and may comprise more or less components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, the memory 1003, which is a kind of computer storage medium, may include therein an operating system and a display screen optical external compensation program.
In the apparatus shown in fig. 1, the processor 1001 may be configured to call up a display screen optical external compensation program stored in the memory 1003, and perform the following operations:
when a display screen displays a monochrome picture under a preset gray scale, shooting the monochrome picture to generate a corresponding shot image, wherein the plurality of preset gray scales form a gray scale sequence, and the monochrome picture at least comprises a red picture, a green picture and a blue picture;
acquiring a sub-pixel matrix of a central area of the shot image, and calculating a central area brightness mean value under the preset gray scale according to the original sub-pixel brightness of all sub-pixels in the sub-pixel matrix, wherein the central area brightness mean value corresponding to each preset gray scale in the gray scale sequence forms a central area mean value sequence;
fitting and generating a fitting gamma value corresponding to the monochrome picture by a mean square error fitting method according to the central area mean value sequence and the gray scale sequence;
carrying out inverse gamma transformation according to the fitting gamma value to obtain human eye observation brightness corresponding to each sub-pixel;
generating a first fitting straight line corresponding to each sub-pixel under the monochrome picture according to the human eye observation brightness of each sub-pixel under the monochrome picture in the gray scale sequence;
obtaining a slope value corresponding to the first fitting straight line;
and converting the data type of the slope value from floating point type data into integer type data, and storing the integer type data to the display screen so that the display screen performs optical external compensation according to the first fitted straight line.
Further, the processor 1001 may call the display screen optical external compensation program stored in the memory 1003, and also perform the following operations:
determining the highest gray scale and the lowest gray scale in the gray scale sequence;
and fitting and generating a fitting gamma value corresponding to the monochrome picture according to the central area brightness mean value of the highest gray scale and the central area brightness mean value of the lowest gray scale.
Further, the processor 1001 may call the display screen optical external compensation program stored in the memory 1003, and also perform the following operations:
performing inverse gamma transformation according to the fitting gamma value, the central area brightness mean value corresponding to the highest gray scale in the gray scale sequence and the original sub-pixel brightness of each sub-pixel under the highest gray scale to obtain the human eye observation brightness corresponding to each sub-pixel under the highest gray scale;
and determining the human eye observation brightness corresponding to each sub-pixel under other gray scales in the gray scale sequence according to the human eye observation brightness corresponding to each sub-pixel under the highest gray scale.
Further, the processor 1001 may call the display screen optical external compensation program stored in the memory 1003, and also perform the following operations:
and sharpening the human eye observation brightness corresponding to each sub-pixel under the gray-scale sequence by using a Laplace sharpening algorithm.
Further, the processor 1001 may call the display screen optical external compensation program stored in the memory 1003, and also perform the following operations:
determining a coordinate array of preset gray scales and human eye observation brightness in each monochrome picture according to the human eye observation brightness respectively corresponding to each sub-pixel in the gray scale sequence;
and generating a first fitting straight line according to the coordinate array, wherein the first fitting straight line passes through the origin of coordinates.
Based on the hardware construction, various embodiments of the display screen optical external compensation method are provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of a display screen optical external compensation method of the present invention, wherein the display screen optical external compensation method includes the following steps:
step S10, when a display screen displays a monochrome picture under a preset gray scale, shooting the monochrome picture to generate a corresponding shot image, wherein a plurality of preset gray scales form a gray scale sequence, and the monochrome picture at least comprises a red picture, a green picture and a blue picture;
in this embodiment, the implementation subject is a display screen optical external compensation device. The Device can be provided with a CCD (Charge coupled Device) shooting module or perform data interaction with the CCD shooting module in a wired or wireless mode. The display screen can be pre-stored with a gray scale sequence, the gray scale sequence comprises a plurality of preset gray scales, and the display screen can respectively display the monochrome picture of each preset gray scale. The device can shoot a monochrome picture under the preset gray scale displayed by the display screen through the CCD shooting module so as to generate a corresponding shot image. The original sub-pixel brightness of all sub-pixels of the display screen corresponding to the single color under the current preset gray scale can be determined according to the shot image, and compensation adjustment is carried out on the sub-pixels according to the original sub-pixel brightness. The sub-pixels of the display screen may include red, green and blue sub-pixels, that is, the monochrome picture may include at least red, green and blue pictures.
It can be understood that the number of frames displayed by the display screen is the product of the number of preset gray scales in the gray scale sequence and the number of monochrome frames. For example, when the gray scale sequence is set to {32, 64, 96, 160, 196, 224}, and the monochrome screen includes red, green, and blue screens, the number of all screens displayed on the display screen is 6 × 3 — 18, that is, the number of captured images is also 18.
Step S20, determining the human eye observation brightness corresponding to each sub-pixel under the preset gray scale according to the original sub-pixel brightness of each sub-pixel in the shot image;
after a shooting image group composed of different preset gray scales and different monochrome pictures is obtained by shooting, a description will be given by taking one of the shooting images as an example. The shot image can correspond to a display picture with a preset gray scale of 32 and a red monochrome picture. The brightness of original sub-pixels corresponding to all red sub-pixels in a display screen under 32 gray scales can be determined according to the shot image, and the human eye observation brightness corresponding to each sub-pixel can be calculated according to a preset De-Mura (optical extraction compensation) algorithm and the brightness of the original sub-pixels of each red sub-pixel.
It can be understood that the human eye observation brightness can be set to correspond to the gray scale value, that is, the human eye observation brightness can range from 0 to 255 and correspond to the gray scale value of the display screen under the monochrome picture. For example, when a red image with a preset gray scale of 32 is displayed on the display screen, if the human eye observation brightness corresponding to a certain sub-pixel in the image is calculated to be 32, it indicates that the sub-pixel can normally display, and when the human eye observation brightness corresponding to the sub-pixel is greater than or less than 32, it indicates that the sub-pixel needs to be subjected to brightness compensation, so as to achieve the panel display standard.
Optionally, the step S20 includes:
step S211, obtaining a sub-pixel matrix of a central area of the shot image, and calculating a central area brightness mean value under the preset gray scale according to the original sub-pixel brightness of all sub-pixels in the sub-pixel matrix, wherein the central area brightness mean value corresponding to each preset gray scale in the gray scale sequence forms a central area mean value sequence;
step S212, according to the central area mean value sequence and the gray level sequence, fitting through a mean square error fitting method to generate a fitting gamma value corresponding to the monochrome picture;
and step S22, performing inverse gamma transformation according to the fitting gamma value to obtain the human eye observation brightness corresponding to each sub-pixel.
In this embodiment, the display panel may include red, green and blue sub-pixels, and Rwidth, Rheight, Gwidth, ghight, Bwidth and bhight are respectively used as the row number and column number of the red, green and blue sub-pixels. That is, in a display panel with a resolution of 1920 × 1080, the number of rows of subpixels is 1920, and the number of columns is 1080. The gray scale sequence may be set as:
GList＝{g1,g2,…gn}
wherein n is the number of gray scales extracted by the brightness under the monochrome picture. For example, the number of gray levels is 6, and the corresponding gray level sequence may be 32, 64, 96, 160, 196, 224.
In the shot image corresponding to a preset gray scale in the gray scale sequence, the original sub-pixel brightness of each sub-pixel under the preset gray scale can be obtained. Corresponding to three monochromatic pictures of red, green and blue, the original sub-pixel brightness data obtained by shooting the image is as follows:
in the display process of the existing display screen, the gamma voltage and the white balance of the display screen are usually corrected and adjusted, and after the gamma voltage of the display screen is adjusted, the original sub-pixel brightness displayed by each sub-pixel has no linear relationship with the actual human eye observation brightness, so that after the original sub-pixel brightness of each sub-pixel is obtained, a fitting gamma value is determined to be used as a transformation parameter under the monochrome picture, and inverse gamma transformation is performed on the original sub-pixel brightness of each sub-pixel to determine the human eye observation brightness corresponding to each sub-pixel under the current preset gray scale, so that brightness compensation is performed according to the human eye observation brightness. For example, in two captured images with preset gray levels of 32 and 64, since the gamma voltages are corrected and adjusted, the two original sub-pixel luminances of the same sub-pixel do not have a corresponding proportional relationship, and after the fitting gamma value is determined and the original sub-pixel luminances are subjected to inverse gamma conversion, the obtained human eye observation luminance is proportional to the preset gray level, that is, in a normal display state, the ratio of the human eye observation luminance of the sub-pixel with the preset gray level of 64 to the human eye observation luminance of the sub-pixel with the preset gray level of 32 is also 64: 32. According to the preset gray scale of each sub-pixel and the corresponding human eye observation brightness, whether the display brightness of the sub-pixel under the current preset gray scale needs to be adjusted or not can be determined.
After acquiring the original sub-pixel brightness of each sub-pixel under the current monochrome picture and the preset gray scale according to the shot image, the original sub-pixel brightness mean value of the central area of the display screen can be used as the central area brightness mean value under the preset gray scale, and the calculation formula is as follows:
wherein the content of the first and second substances,
the red sub-pixel corresponding to the coordinate (i, j) is at the preset gray level gnThe luminance of the original sub-pixel in the lower,
presetting gray scale as g in red picturenCenter area luminance mean of bottom. The central area is a sub-pixel matrix consisting of sub-pixels in the center of the display screen. The row and column widths of the sub-pixel matrix may be arranged to displayThe height of the screen row and the column width are half, i.e. the area of the sub-pixel matrix is one quarter of the display area of the display screen.
It can be understood that, taking a red image as an example, after obtaining the central area brightness mean value under each preset gray level in the gray level sequence, the central area mean value sequence corresponding to the gray level sequence under the red image can be formed:
after the central area mean sequence corresponding to the gray scale sequence under the monochrome picture is determined, the fitting gamma value corresponding to the monochrome picture can be generated through a preset fitting algorithm according to the central area mean sequence and the gray scale sequence. The preset fitting algorithm may be a mean square error fitting method:
taking the gray-scale sequence {32, 64, 96, 160, 196, 224} under the red frame as an example, any two predetermined gray-scales are selected from the gray-scale sequence in common
Namely 15. The corresponding fitting gamma values under each selection mode are as follows:
wherein k is { g ═ gi,gjAnd i, and i>j。
After the corresponding 15 fitting gamma values are calculated according to the selection mode, the fitting mean square error of each fitting gamma value and the brightness mean value of the central area of all the preset gray scales is calculated, and the fitting gamma value with the minimum fitting mean square error is selected from the fitting gamma values to serve as the fitting gamma value corresponding to the single-color picture. For example, after selecting the fitting gamma values corresponding to the preset gray levels of 32 and 64, the sum of the mean square errors of the brightness mean of the central area of the preset gray levels 96, 160, 196, 224 and the fitting curve corresponding to the fitting gamma values is calculated by using the following fitting mean square error calculation formula:
after the sum of the fitting mean square errors corresponding to all the fitting gamma values is calculated by using the mean square error calculation formula, the fitting gamma value with the minimum sum of the fitting mean square errors can be selected.
Calculating to obtain a fitting gamma value gamma corresponding to the red picture(R)Then, the same calculation method can be adopted to obtain the fitting gamma value gamma corresponding to the green picture and the blue picture(G)And gamma(B)。
Step S30, generating a first fitting straight line corresponding to each sub-pixel in the monochrome picture according to the human eye observation brightness corresponding to each sub-pixel in the gray scale sequence in the monochrome picture;
taking a red picture as an example, when a monochrome picture is a red picture, after the human eye observation brightness corresponding to each sub-pixel in the display screen under each preset gray scale is determined, the human eye observation brightness respectively corresponding to the same sub-pixel in the gray scale sequence is used as a coordinate coefficient group to perform straight line fitting so as to generate a first fitting straight line corresponding to the sub-pixel. For example, after determining the human-eye observed luminance corresponding to each sub-pixel in the red frame with the gray scale sequence {32, 64, 96, 160, 196, 224}, taking a certain sub-pixel as an example, the human-eye observed luminance corresponding to the sub-pixel with the preset gray scale of 32, 64, 96, 160, 196, 224 is 30, 60, 90, 162, 198, 226, the coordinate coefficient group can be determined as { (32, 30), (64, 60), (96, 90), (160, 162), (196, 198), (224, 226) }, and the first fit straight line g) (g) k · g + b can be obtained by fitting the above-mentioned groups. g is as large as N+And g is less than or equal to 255.
And step S40, storing the first fitted straight line to the display screen so that the display screen performs optical external compensation according to the first fitted straight line.
After the first fitted straight line corresponding to a certain sub-pixel under the red picture is generated, the first fitted straight lines corresponding to all sub-pixels in the display screen under the red picture can be calculated through the same calculation process. And after the red picture is changed into the green picture and the blue picture, first fitting straight lines corresponding to all green sub-pixels and all blue sub-pixels in the display screen can be obtained. That is, the number of the first fitting straight lines obtained by final calculation is the sum of the numbers of the red, green and blue sub-pixels in the display screen.
After the first fitted straight lines respectively corresponding to all the sub-pixels are calculated, the data of the first fitted straight lines can be stored in the display screen, and when the display screen displays a picture, optical external compensation can be performed according to the first fitted straight line corresponding to each sub-pixel and the gray scale currently corresponding to the sub-pixel.
Optionally, the step S40 includes:
step S41, obtaining a slope value corresponding to the first fitting straight line;
and step S42, converting the data type of the slope value from floating point type data into integer type data, and storing the integer type data into the display screen so as to enable the display screen to perform optical external compensation according to the first fitted straight line.
In this embodiment, since the range of the preset gray scale is 0 to 255, the first fitting straight line is a straight line of a zero crossing point, and the numerical range of the human eye observation brightness is quantized to 0 to 255. Therefore, in an ideal situation, the first fitted straight line corresponding to the sub-pixel that does not need to be externally optically compensated should be a straight line with a slope of 1, and the slope value of the sub-pixel that is brighter or darker can be represented by an offset Δ G at 255, as shown in fig. 6, where Δ G is related to the slope k as follows:
In the data storage process, since the slope value k needs to define the data type as single-precision floating point data when storing, the data length sizeof (float) occupied by each slope is 4 bytes. That is, the number of subpixels for a display screen is:
S＝Rwidth*Rheight+Gwidth*Gheight+Bwidth*Bheight
the slope value corresponding to each sub-pixel is stored in the display screen, the required storage space at least needs S × 4 bytes, and for the OLED display screen with resolution of 1920 × 720 and delta arrangement of sub-pixels, the storage space of 1920 × 720 × 3 × 4 ═ 15.82MB needs to be occupied. When the storage space is excessively occupied, the data communication time in the De-Mura data burning process is very long, so that the optical external compensation efficiency of the display screen is reduced.
After the slope value k is converted into Δ G, the data type of Δ G is int integer data, when the 8 th bit is a sign bit, the representing range of Δ G is-128 to 127, the precision is 1, and sizeof (int) ═ 1 byte, then Δ G corresponding to each sub-pixel is stored into the display screen, which only needs to store one quarter of the space size of the slope value, that is, 3.955 MB. After the stored data capacity is reduced, the total data communication time length in the corresponding data burning process is also greatly reduced, so that the data transmission efficiency and the overall efficiency of optical external compensation are improved, and the occupied space can be reduced.
It should be noted that Δ G usually does not reach 255 due to the low luminance shift of the sub-pixels of the OLED display panel. Therefore, an 8-bit floating point number expression method can be provided, in which the 1 st bit is used as a decimal representation bit (i.e. 0 represents 0, 1 represents 0.5), the 2 nd to 7 th bits are integer part representation bits, the 8 th bit is a sign bit (0 represents + and 1 represents-), the floating point number at this time is represented in a range of-64 to +63.5, and the precision of the decimal part is 0.5. In the floating-point expression, Δ G ranges from-64 to + 63.5.
Similarly, the floating-point number expression method can further adjust the precision, and the floating-point number expression range is-32- +31.75 and the precision of the decimal part is 0.25 when the 1 st to 2 nd bits are used as the decimal representation bits (00 represents 0, 01 represents 0.25, 10 represents 0.5, 11 represents 0.75), the 3 rd to 7 th bits are used as the integer part representation bits, the 8 th bit is used as the sign bit (0 represents + and 1 represents-).
When 1 to 3 bits are used as decimal representation bits (000 represents 0, 001 represents 0.125, and 111 represents 0.875), 4 to 7 bits are integer part representation bits, 8 bits are sign bits (0 represents + and 1 represents-), floating point numbers represent a range of-16 to +15.875, and the precision of the decimal part is 0.125.
The floating-point number expression methods can be switched by adjusting the numerical value of the register, and in an OLED display screen with small brightness deviation, a more accurate floating-point number expression method can be selected for storing data, so that sub-pixels are accurately compensated. In the OLED display screen with large brightness deviation, the floating point number expression method with a large expression range can be selected for storing data.
In a preferred embodiment, after determining Δ G of each sub-pixel in different monochrome pictures and different preset grayscales, Δ G of four sub-pixels constituting the matrix can be averaged and stored in a 2 × 2block average compression mode, and the storage space is only one quarter of the Δ G storage mode, namely 0.988MB, thereby further reducing the space occupied by storage.
After the delta G corresponding to each sub-pixel is stored in the De-Mura data cache of the display screen, when the OLED module display screen displays images, the compensated image gray scale is obtained according to the following calculation process for displaying, and then the optical external compensation can be realized:
wherein G (i, j) is the gray scale to be displayed by the sub-pixel (i, j), G (i, j) is the gray scale displayed by the sub-pixel (i, j) after being compensated by De-Mura, and Δ G (i, j) is the Mura compensation data corresponding to the sub-pixel (i, j) stored in the display screen.
In this embodiment, by shooting a monochrome picture displayed by a display screen at a preset gray scale, the brightness of an original sub-pixel corresponding to each monochrome sub-pixel at the preset gray scale can be obtained according to a shot image, a fitting gamma value at the monochrome picture can be generated through mean square error fitting according to the average brightness of sub-pixels at a central region and a gray scale sequence, and human eye observation brightness corresponding to each monochrome sub-pixel in the gray scale sequence is obtained after inverse gamma conversion is performed on the fitting gamma value. And performing linear fitting on the corresponding relation between the preset gray scale of each single-color sub-pixel and the observation brightness of human eyes to obtain a first fitted straight line corresponding to each single-color sub-pixel under the single-color picture. The first fitting straight lines corresponding to all the sub-pixels in the display screen can be calculated by adjusting the monochrome picture and the preset gray scale. Because the first fitting straight line is stored in the display screen, the storage space occupied by the first fitting straight line is large, the slope value corresponding to the first fitting straight line can be converted into shaping data from floating point data through data type conversion, and therefore a large amount of storage space can be saved while the accuracy of the slope value is not obviously reduced, and the communication time consumed by data transmission can be reduced. After the display screen receives and stores the first fitting straight line corresponding to each sub-pixel, the display screen can perform optical external compensation on the sub-pixel according to the current gray scale of each sub-pixel and the corresponding first fitting straight line when displaying a picture. The embodiment of the invention provides a linear estimation model for the display brightness of the sub-pixels of the OLED display screen, which can accurately estimate the actual display effect of each sub-pixel in different display gray scales, and the display effect accords with the human eye perception characteristic, so that the compensation effect is more fit with the human eye visual characteristic.
Further, referring to fig. 3, fig. 3 is a flowchart illustrating a second embodiment of the display screen optical external compensation method according to the present invention, based on the embodiment shown in fig. 2, where step S211 is to obtain a sub-pixel matrix of a central area of the captured image, and calculate a central area luminance mean value under the preset gray scale according to original sub-pixel luminance of all sub-pixels in the sub-pixel matrix, and after the step of forming a central area mean value sequence by a central area luminance mean value corresponding to each preset gray scale in the gray scale sequence, the method further includes:
step S213, determining the highest gray scale and the lowest gray scale in the gray scale sequence;
and step S214, fitting and generating a fitting gamma value corresponding to the monochrome picture according to the central area brightness mean value of the highest gray scale and the central area brightness mean value of the lowest gray scale.
In this embodiment, in addition to the fitting gamma value calculated by the mean square error fitting method, the fitting gamma value may be calculated directly by the highest gray level and the lowest gray level in the gray level sequence. In the above embodiment of selecting the fitting gamma value by using the sum of mean square errors, if the number of preset gray levels in the gray level sequence is too large, the calculation amount of calculating the sum of mean square errors of the fitting gamma value is large, and the time consumption is long. In order to reduce time consumption and reduce calculation amount, the highest gray scale and the lowest gray scale in the gray scale sequence can be selected for calculating the fitting gamma value. For example, in the gray scale sequence {32, 64, 96, 160, 196, 224}, i ═ 224 and j ═ 32 are selected, and the fitting gamma value is calculated by using the following formula:
it will be appreciated that the above fitting gamma value is
Compared with a mode of calculating the sum of fitting mean square errors of all fitting gamma values and selecting the fitting gamma value according to the sum of the fitting mean square errors, the method is low in fitting precision, can meet the compensation precision requirement of a display screen, and can calculate quickly to obtain the fitting gamma value.
Further, referring to fig. 4, fig. 4 is a detailed flowchart of step S22 in the third embodiment of the display screen optical external compensation method of the present invention, based on the embodiment shown in fig. 2, the step S22 of performing inverse gamma transformation according to the fitted gamma value to obtain the human eye observed brightness corresponding to each sub-pixel includes:
step S221, inverse gamma conversion is carried out according to the fitting gamma value, the central area brightness mean value corresponding to the highest gray scale in the gray scale sequence and the original sub-pixel brightness of each sub-pixel under the highest gray scale, and human eye observation brightness corresponding to each sub-pixel under the highest gray scale is obtained;
step S222, determining the human eye observation brightness corresponding to each sub-pixel under other gray scales in the gray scale sequence according to the human eye observation brightness corresponding to each sub-pixel under the highest gray scale.
In this embodiment, continuing to take the red frame as an example, the fitting gamma value γ under the red frame is obtained(R)Then, the highest gray scale in the gray scale sequence can be determined, and the central area brightness mean value corresponding to the highest gray scale and the original sub-pixel brightness of each sub-pixel under the highest gray scale can be obtained. And carrying out inverse gamma conversion on the brightness of the original sub-pixel to obtain the human eye observation brightness corresponding to each sub-pixel under the highest gray scale. Wherein, the inverse gamma conversion formula of the human eye observation brightness under the highest gray scale is as follows:
wherein the content of the first and second substances,
the molecule of (A) is
Namely the original sub-pixel brightness of each sub-pixel under the highest gray scale of the red picture; denominator is
Namely the brightness mean value of the corresponding central area under the highest gray scale of the red picture.
After the human eye observation brightness corresponding to each sub-pixel at the highest gray scale in the red picture is determined, inverse gamma conversion can be performed according to the human eye observation brightness at the highest gray scale, the original sub-pixel brightness of each sub-pixel at other gray scales and the central area brightness mean value corresponding to the other gray scales so as to obtain the human eye observation brightness corresponding to each sub-pixel at other gray scales. Wherein, the inverse gamma conversion formula of the human eye observation brightness under other gray scales is as follows:
in the gray scale sequence, the human eye observation brightness corresponding to each sub-pixel under all the preset gray scales can be determined in sequence by the two modes.
With reference to fig. 4, after the step S222 of determining the human eye observation brightness corresponding to each sub-pixel at other gray levels in the gray level sequence according to the human eye observation brightness corresponding to each sub-pixel at the highest gray level, the method further includes:
step S223, sharpening the human eye observation brightness corresponding to each sub-pixel in the gray-scale sequence by using a laplacian sharpening algorithm.
In this embodiment, after determining the human eye observed brightness corresponding to each sub-pixel under all preset gray scales, sharpening the human eye observed brightness by using a laplacian sharpening algorithm may be performed, where a specific formula is as follows:
in the above formula, σ is an adjustment factor, and when σ is 0, it means that enhancement processing is not performed,
and when a is > 0, the data is,
the actual human eye observation brightness is increased after sharpening, the function of enhancing and adjusting is achieved, and the effect of enhancing and optimizing the part with insufficient subsequent compensation force is achieved.
Further, referring to fig. 5, fig. 5 is a schematic diagram illustrating a detailed flow of step S30 in a fifth embodiment of the display screen optical external compensation method according to the present invention, based on the embodiments shown in fig. 4 and fig. 5, the step S30 of generating a first fitting straight line corresponding to each sub-pixel in the monochrome picture according to the human eye observation brightness respectively corresponding to each sub-pixel in the grayscale sequence in the monochrome picture includes:
step S31, determining a coordinate array of the preset gray scale and the human eye observation brightness in each monochrome picture according to the human eye observation brightness respectively corresponding to each sub-pixel in the gray scale sequence;
and step S32, generating a first fitting straight line according to the coordinate array, wherein the first fitting straight line passes through the coordinate origin.
In this embodiment, taking a red frame as an example, after obtaining the human eye observation brightness corresponding to all the preset gray scales in the gray scale sequence corresponding to each sub-pixel through calculation, the preset gray scale value of each sub-pixel may be used as x coordinate data of line fitting, and the corresponding human eye observation brightness is used as y coordinate data of line fitting to perform line fitting. The fitted coordinate array is represented as follows:
wherein (i, j) represents the coordinate position of the sub-pixel on the display screen, i ∈ N + and i ∈ N +<Rheight，j∈N+And j is<Rwidth。
It can be understood that the preset gray scale and the human eye observation brightness range are both 0-255, therefore, when the preset gray scale is 0, the corresponding human eye observation brightness should also be 0, and the theoretical human eye sensory brightness expression data (0) of the 0 gray scale and the 0 gray scale are added to the coordinate array of the straight line fitting to obtain:
after the straight line fitting is carried out on the P (i, j), a fitting straight line G (g) k.g + b can be obtained, wherein g is a gray scale value, and g belongs to N+And g is less than or equal to 255.
It can be understood that since the theoretical human eye observation brightness 0 at the 0 gray level is increased into the fitted coordinate array and the theoretically fitted straight line is a straight line passing through the coordinate origin, the straight line intercept b can be regarded as a 0 value and can be ignored. Under red picture, sub-pixel human eye sense brightness straight line modelThe slope matrix k may be used(R)To indicate.
It should be noted that the slope matrix k is obtained by dividing(R)And storing the first fitting straight line into the display screen, namely storing the first fitting straight line corresponding to all the red sub-pixels into the display screen.
Calculating to obtain a slope matrix k of first fitting straight lines corresponding to all red sub-pixels in the display screen under a red picture(R)Then, k corresponding to the green sub-pixel and the blue sub-pixel can be calculated in the same way(G)And k(B)And stored in the display screen.
The present invention also provides a display screen optical external compensation device, which includes a memory, a processor and a display screen optical external compensation program stored in the memory and executable on the processor, wherein the display screen optical external compensation program, when executed by the processor, implements the steps of the display screen optical external compensation method according to the above embodiments.
The present invention also provides a medium storing a display screen optical external compensation program, which when executed by a processor implements the steps of the display screen optical external compensation method according to the above embodiment.
It is to be understood that throughout the description of the present specification, reference to the term "one embodiment", "another embodiment", "other embodiments", or "first through nth embodiments", etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. An optical external compensation method for a display screen, comprising the steps of:
when a display screen displays a monochrome picture under a preset gray scale, shooting the monochrome picture to generate a corresponding shot image, wherein the plurality of preset gray scales form a gray scale sequence, and the monochrome picture at least comprises a red picture, a green picture and a blue picture;
acquiring a sub-pixel matrix of a central area of the shot image, and calculating a central area brightness mean value under the preset gray scale according to the original sub-pixel brightness of all sub-pixels in the sub-pixel matrix, wherein the central area brightness mean value corresponding to each preset gray scale in the gray scale sequence forms a central area mean value sequence;
fitting and generating a fitting gamma value corresponding to the monochrome picture by a mean square error fitting method according to the central area mean value sequence and the gray scale sequence;
carrying out inverse gamma transformation according to the fitting gamma value to obtain human eye observation brightness corresponding to each sub-pixel;
according to the preset gray scale of each sub-pixel and the corresponding human eye observation brightness, whether the display brightness of the sub-pixel under the current preset gray scale needs to be adjusted or not can be determined;
generating a first fitting straight line corresponding to each sub-pixel under the monochrome picture according to the human eye observation brightness of each sub-pixel under the monochrome picture in the gray scale sequence;
obtaining a slope value corresponding to the first fitting straight line;
and converting the data type of the slope value from floating point type data into integer type data, and storing the integer type data to the display screen so that the display screen performs optical external compensation according to the first fitted straight line.
2. The method for optically compensating the exterior of a display screen according to claim 1, wherein after the step of obtaining a sub-pixel matrix of a central area of the captured image and calculating a mean value of the brightness of the central area at the preset gray level according to the original sub-pixel brightness of all sub-pixels in the sub-pixel matrix, the method further comprises:
determining the highest gray scale and the lowest gray scale in the gray scale sequence;
and fitting and generating a fitting gamma value corresponding to the monochrome picture according to the central area brightness mean value of the highest gray scale and the central area brightness mean value of the lowest gray scale.
3. The method for optically compensating the exterior of a display screen according to claim 1, wherein the step of performing an inverse gamma transformation on the fitted gamma values to obtain the brightness observed by the human eye corresponding to each sub-pixel comprises:
performing inverse gamma transformation according to the fitting gamma value, the central area brightness mean value corresponding to the highest gray scale in the gray scale sequence and the original sub-pixel brightness of each sub-pixel under the highest gray scale to obtain the human eye observation brightness corresponding to each sub-pixel under the highest gray scale;
and determining the human eye observation brightness corresponding to each sub-pixel under other gray scales in the gray scale sequence according to the human eye observation brightness corresponding to each sub-pixel under the highest gray scale.
4. The method as claimed in claim 3, wherein said step of determining the observed luminance of the human eye corresponding to each sub-pixel at other gray levels in the gray scale sequence based on the observed luminance of the human eye corresponding to each sub-pixel at the highest gray level further comprises:
and sharpening the human eye observation brightness corresponding to each sub-pixel under the gray-scale sequence by using a Laplace sharpening algorithm.
5. The method for optically compensating externally of a display screen of claim 3, wherein the step of generating a first fitted straight line corresponding to each sub-pixel in the monochrome picture according to the human eye observation brightness corresponding to each sub-pixel in the gray scale sequence in the monochrome picture comprises:
determining a coordinate array of preset gray scales and human eye observation brightness in each monochrome picture according to the human eye observation brightness respectively corresponding to each sub-pixel in the gray scale sequence;
and generating a first fitting straight line according to the coordinate array, wherein the first fitting straight line passes through the origin of coordinates.
6. A display screen optical external compensation device, comprising a memory, a processor, and a display screen optical external compensation program stored on the memory and executable on the processor, wherein: the display screen optical external compensation program when executed by the processor implements the steps of the display screen optical external compensation method according to any one of claims 1 to 5.
7. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a display screen optical external compensation program, which when executed by a processor implements the steps of the display screen optical external compensation method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011266786.3A CN112562576B (en) | 2020-11-12 | 2020-11-12 | Display screen optical external compensation method, device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011266786.3A CN112562576B (en) | 2020-11-12 | 2020-11-12 | Display screen optical external compensation method, device and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112562576A CN112562576A (en) | 2021-03-26 |
| CN112562576B true CN112562576B (en) | 2021-09-03 |
Family
ID=75042980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011266786.3A Active CN112562576B (en) | 2020-11-12 | 2020-11-12 | Display screen optical external compensation method, device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112562576B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114333722B (en) * | 2021-12-24 | 2023-10-24 | 重庆惠科金渝光电科技有限公司 | Display panel debugging method and device |
| CN114299854B (en) * | 2021-12-24 | 2023-05-09 | 杭州海康威视数字技术股份有限公司 | LED display screen adjusting system, method, equipment and readable storage medium |
| CN114283731B (en) * | 2021-12-30 | 2023-09-22 | 昆山国显光电有限公司 | Pressure drop compensation method, apparatus, device, medium and program product |
| CN114743509B (en) * | 2022-03-31 | 2023-11-17 | 海宁奕斯伟集成电路设计有限公司 | Image processing method, device and display device |
| CN116229870B (en) * | 2023-05-10 | 2023-08-15 | 苏州华兴源创科技股份有限公司 | Compensation data compression and decompression method and display panel compensation method |
| CN117612482B (en) * | 2024-01-23 | 2024-04-26 | 深圳博邦诚光电有限公司 | Network playing method and system for LED display screen |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047149A (en) * | 2014-04-15 | 2015-11-11 | 株式会社日本显示器 | Display device and display control method |
| CN106601167A (en) * | 2016-12-20 | 2017-04-26 | 上海天马有机发光显示技术有限公司 | Gray scale compensation method, apparatus and system of display panel |
| CN107068037A (en) * | 2017-05-26 | 2017-08-18 | 武汉天马微电子有限公司 | The gray scale correction method and gray scale correction device of display panel |
| CN108492776A (en) * | 2018-03-29 | 2018-09-04 | 苏州佳智彩光电科技有限公司 | A kind of AMOLED screens brightness disproportionation intelligent external optical compensation method |
| CN109036326A (en) * | 2018-10-23 | 2018-12-18 | 惠科股份有限公司 | A kind of gamma curve method and device adjusting display panel |
| CN109147707A (en) * | 2018-09-30 | 2019-01-04 | 重庆惠科金渝光电科技有限公司 | Gamma value adjusting method, device and the display equipment of display panel |
| CN109410834A (en) * | 2018-10-22 | 2019-03-01 | 惠科股份有限公司 | A kind of the brightness correction method and brightness correction equipment of display panel |
| CN110390653A (en) * | 2019-07-24 | 2019-10-29 | 易诚高科（大连）科技有限公司 | A kind of high robust DeMURA method for OLED screen |
| CN110796979A (en) * | 2019-11-14 | 2020-02-14 | 华兴源创(成都)科技有限公司 | Driving method and driving device of display panel |
| CN110890046A (en) * | 2018-09-10 | 2020-03-17 | 京东方智慧物联科技有限公司 | Method and device for modulating brightness-gray scale curve of display equipment and electronic equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101850994B1 (en) * | 2011-11-18 | 2018-04-23 | 삼성디스플레이 주식회사 | Method for controlling brightness in a display device and the display device using the same |
| KR20160012258A (en) * | 2014-07-23 | 2016-02-03 | 삼성디스플레이 주식회사 | Method of operating a display device and display device |
-
2020
- 2020-11-12 CN CN202011266786.3A patent/CN112562576B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047149A (en) * | 2014-04-15 | 2015-11-11 | 株式会社日本显示器 | Display device and display control method |
| CN106601167A (en) * | 2016-12-20 | 2017-04-26 | 上海天马有机发光显示技术有限公司 | Gray scale compensation method, apparatus and system of display panel |
| CN107068037A (en) * | 2017-05-26 | 2017-08-18 | 武汉天马微电子有限公司 | The gray scale correction method and gray scale correction device of display panel |
| CN108492776A (en) * | 2018-03-29 | 2018-09-04 | 苏州佳智彩光电科技有限公司 | A kind of AMOLED screens brightness disproportionation intelligent external optical compensation method |
| CN110890046A (en) * | 2018-09-10 | 2020-03-17 | 京东方智慧物联科技有限公司 | Method and device for modulating brightness-gray scale curve of display equipment and electronic equipment |
| CN109147707A (en) * | 2018-09-30 | 2019-01-04 | 重庆惠科金渝光电科技有限公司 | Gamma value adjusting method, device and the display equipment of display panel |
| CN109410834A (en) * | 2018-10-22 | 2019-03-01 | 惠科股份有限公司 | A kind of the brightness correction method and brightness correction equipment of display panel |
| CN109036326A (en) * | 2018-10-23 | 2018-12-18 | 惠科股份有限公司 | A kind of gamma curve method and device adjusting display panel |
| CN110390653A (en) * | 2019-07-24 | 2019-10-29 | 易诚高科（大连）科技有限公司 | A kind of high robust DeMURA method for OLED screen |
| CN110796979A (en) * | 2019-11-14 | 2020-02-14 | 华兴源创(成都)科技有限公司 | Driving method and driving device of display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112562576A (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112562576B (en) | Display screen optical external compensation method, device and storage medium | |
| CN111161691B (en) | Compensation method and compensation device for display screen and display device | |
| CN107665684B (en) | Color Mura compensation method | |
| CN110085166B (en) | Bright spot compensation method and device for curved screen | |
| CN109036249B (en) | Display method of curved surface display panel and curved surface display device | |
| JP5430068B2 (en) | Display device | |
| US8159511B2 (en) | Methods and systems for sub-pixel rendering with gamma adjustment | |
| US8421820B2 (en) | Methods and systems for sub-pixel rendering with adaptive filtering | |
| CN111415616B (en) | Method for improving picture display quality, time sequence controller and display device | |
| CN108122525B (en) | Display device and image processing method thereof | |
| CN107545868B (en) | Display device | |
| CN111243512B (en) | Gray-scale data compensation method and device and driving chip | |
| JP2003015612A (en) | Driving method for liquid crystal display, liquid crystal display device and monitor | |
| CN108122546B (en) | Display apparatus and image processing method thereof | |
| JP2013257477A (en) | Display unit, image processing unit, and display method | |
| CN109949744B (en) | Gamma voltage correction method and device | |
| CN109461400B (en) | Sub-pixel rendering method and device for converting RGB (red, green and blue) image into RGBW (red, green and blue) image | |
| CN110085168B (en) | Driving method and device of display panel | |
| WO2004044881A1 (en) | Liquid crystal display and driving method thereof | |
| CN114267291A (en) | Gray scale data determination method, device and equipment and screen driving board | |
| CN113920917A (en) | Display panel compensation method and compensation device | |
| CN111462260A (en) | Mura compensation method and device of display panel and electronic equipment | |
| CN113380170B (en) | Display compensation method and device of display panel, display device and medium | |
| KR20090033565A (en) | Apparatus and method of converting image signal for four color display device | |
| CN115966159A (en) | Gray scale compensation method, display device and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |