CN117746808A - Display calibration method, display panel calibration system and display device - Google Patents
Display calibration method, display panel calibration system and display device Download PDFInfo
- Publication number
- CN117746808A CN117746808A CN202311871986.5A CN202311871986A CN117746808A CN 117746808 A CN117746808 A CN 117746808A CN 202311871986 A CN202311871986 A CN 202311871986A CN 117746808 A CN117746808 A CN 117746808A
- Authority
- CN
- China
- Prior art keywords
- display
- partition
- color
- value
- luminance
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005192 partition Methods 0.000 claims abstract description 273
- 238000012937 correction Methods 0.000 claims abstract description 20
- 239000003086 colorant Substances 0.000 claims description 10
- 238000013507 mapping Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 16
- 238000003384 imaging method Methods 0.000 description 11
- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003190 augmentative effect Effects 0.000 description 2
- 238000004737 colorimetric analysis Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- ORFSSYGWXNGVFB-UHFFFAOYSA-N sodium 4-amino-6-[[4-[4-[(8-amino-1-hydroxy-5,7-disulfonaphthalen-2-yl)diazenyl]-3-methoxyphenyl]-2-methoxyphenyl]diazenyl]-5-hydroxynaphthalene-1,3-disulfonic acid Chemical compound COC1=C(C=CC(=C1)C2=CC(=C(C=C2)N=NC3=C(C4=C(C=C3)C(=CC(=C4N)S(=O)(=O)O)S(=O)(=O)O)O)OC)N=NC5=C(C6=C(C=C5)C(=CC(=C6N)S(=O)(=O)O)S(=O)(=O)O)O.[Na+] ORFSSYGWXNGVFB-UHFFFAOYSA-N 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Controls And Circuits For Display Device (AREA)
Abstract
The application discloses a display calibration method, a display panel calibration system and a display device. The method is applied to the display panel, the display area of the display panel comprises at least three display partitions, the at least three display partitions comprise a first display partition and a second display partition, and the method comprises the following steps: according to the first luminance and chrominance data of the first display partition and the second luminance and chrominance data of the second display partition, gamma compensation tables respectively corresponding to the second display partitions are obtained; respectively compensating the brightness value and the chromaticity value of the second display partition according to the gamma compensation table; and correcting the color quasi of the display area according to the three-dimensional color lookup table obtained after the brightness value and the chromaticity value are adjusted. The color accuracy consistency correction is carried out on the panel, the color deviation is reduced, the brightness uniformity is improved, and the display effect is improved.
Description
Technical Field
The application relates to the technical field of display panel driving, in particular to a display calibration method, a display panel calibration system and a display device.
Background
With the development of technology, the development of display technology is also gradually changed, and the pursuit of display effect is also increasingly high from black and white to color to high dynamic range imaging (High Dynamic Range Imaging, HDR).
The color appearance of the same display area on different displays may be different due to the uneven hardware level of the displays, resulting in great inconvenience. Thus, currently displays contain substantially the color level Δe requirement. The color level Δe is a standard for quantifying the difference between the display color and the original color of the input content, and is set by the international commission on illumination, and the smaller Δe is, the smaller the color difference is. In order to obtain a more accurate display effect, it is often necessary to calibrate the display effect of the display panel.
Disclosure of Invention
The embodiment of the application provides a display calibration method, a display panel calibration system and a display device, which solve the problem that the display effect of the display panel cannot be over-all.
In a first aspect, the present application provides a display calibration method applied to a display panel, where a display area of the display panel includes at least three display partitions, the at least three display partitions include a first display partition and a second display partition, the first display partition is located in a central area of the at least three display partitions, and the second display partition is a display partition other than the first display partition among the at least three display partitions, where the method includes:
According to the first luminance and chrominance data of the first display partition and the second luminance and chrominance data of the second display partition, gamma compensation tables respectively corresponding to the second display partitions are obtained;
respectively compensating the brightness value and the chromaticity value of the second display partition according to the gamma compensation table;
and correcting the color quasi of the display area according to the three-dimensional color lookup table obtained after the brightness value and the chromaticity value are adjusted.
In some embodiments, the obtaining the gamma compensation table respectively corresponding to each of the second display partitions according to the first luminance and chrominance data of the first display partition and the second luminance and chrominance data of the second display partition includes:
acquiring first luminance and chrominance data of the first display partition and second luminance and chrominance data of the second display partition;
respectively acquiring a first display parameter of the first display partition and a second display parameter of the second display partition according to the first brightness and chrominance data and the second brightness and chrominance data;
and obtaining a gamma compensation table corresponding to each second display partition according to the first display parameters and the second display parameters.
In some embodiments, the obtaining the first luminance and chrominance data of the first display section and the second luminance and chrominance data of the second display section includes:
Acquiring original brightness and chrominance data corresponding to a preset picture displayed by the display panel;
acquiring first luminance and chrominance data of the first display partition according to coordinates of all sub-pixels in the first display partition and the original luminance and chrominance data;
and acquiring second luminance and chrominance data of the second display partition according to the coordinates of each sub-pixel in the second display partition and the original luminance and chrominance data.
In some embodiments, the obtaining the first display parameter of the first display section and the second display parameter of the second display section according to the first luminance and chrominance data and the second luminance and chrominance data respectively includes:
determining first display parameters corresponding to three colors of red, green and blue according to the first luminance and chrominance data, wherein the first display parameters comprise a first luminance value and a first color coordinate;
and determining second display parameters corresponding to the three colors of red, green and blue according to the second luminance and chrominance data, wherein the second display parameters comprise a second luminance value and a second color coordinate.
In some embodiments, the obtaining the gamma compensation table corresponding to each of the second display partitions according to the first display parameter and the second display parameter includes:
Performing difference calculation on the first display parameter corresponding to the current color in the second display partition and the second display parameter corresponding to the current color in the first display partition to obtain display difference values of the second display partitions and the first display partition under the current color respectively;
and obtaining a gamma compensation table corresponding to the second display partition according to the display difference value.
In some embodiments, the display difference value includes a luminance value difference and a chrominance value difference, and the obtaining the gamma compensation table corresponding to the second display partition according to the display difference value includes:
obtaining a brightness compensation value applicable to the second display partition under the current color according to the brightness value difference of the second display partition and the first display partition under the current color;
obtaining a corresponding chromaticity compensation value applicable to the second display partition under the current color according to the chromaticity value difference of the second display partition and the first display partition under the current color;
and obtaining a gamma compensation table corresponding to the second display partition according to the brightness compensation value and the chromaticity compensation value.
In some embodiments, the performing color quasi-correction on the display area according to the three-dimensional color lookup table acquired after the adjustment of the luminance value and the chrominance value includes:
acquiring the three-dimensional color lookup table according to the brightness color data of the first display subarea;
and respectively carrying out color calibration on the first display subarea and the second display subarea according to the three-dimensional color lookup table.
In some embodiments, the obtaining the three-dimensional color look-up table comprises the steps of:
obtaining output color parameters of a preset picture;
after compensating the brightness value and the chromaticity value of the second display partition, acquiring brightness and chromaticity data of the first display partition, and acquiring input color parameters according to the brightness and chromaticity data of the first display partition;
and obtaining the three-dimensional color lookup table according to the mapping relation between the input color parameters and the output color parameters.
In a second aspect, the present application further provides a calibration system of a display panel, a display area of the display panel includes at least three display partitions, the at least three display partitions include a first display partition and a second display partition, the first display partition is located in a central area of the at least three display partitions, and the second display partition is a display partition other than the first display partition among the at least three display partitions, the system includes:
The processing module is used for obtaining gamma compensation tables corresponding to the second display partitions respectively according to the first luminance and chrominance data of the first display partition and the second luminance and chrominance data of the second display partition;
the compensation module is used for respectively compensating the brightness value and the chromaticity value of the second display partition according to the gamma compensation table;
and the calibration module is used for carrying out color quasi correction on the display area according to the three-dimensional color lookup table obtained after the brightness value and the chromaticity value are adjusted.
In a third aspect, the present application also provides a display device, the display device comprising a display panel, a memory, the memory storing a computer program, and a processor for running the computer program in the memory to perform the steps in the display calibration method according to the first aspect.
The beneficial effects are that: the application provides a display calibration method, a display panel calibration system and a display device. And controlling each second display partition to adaptively adjust the voltage of the second display partition according to the gamma compensation table corresponding to each second display partition while keeping the brightness value and the chromaticity value of the first display partition of the display panel unchanged, so that the difference between the gray scale value and the chromaticity value of the adjusted second display partition and the gray scale value and the chromaticity value of the first display partition is reduced. And then, the color quasi delta E correction is carried out on the picture displayed in the whole display area according to the three-dimensional color lookup table obtained after the adjustment of the brightness value and the chromaticity value, so that the gap between the actual display effect and the expected display effect of the display panel is reduced, the color shift can be reduced, the uniformity of the brightness and the chromaticity is improved, and the display effect is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a gamma compensation table according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a three-dimensional color lookup table according to an embodiment of the present application.
Fig. 3 is a schematic flow chart of a display calibration method according to an embodiment of the present application.
Fig. 4 is a schematic diagram of a display panel divided into 9 display areas according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "one end," "the other end," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present application and to simplify the description, rather than to indicate or imply that the apparatus or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "" "is two or more, unless explicitly defined otherwise.
It should be noted that in the embodiments of the present application, "connected" is understood to mean electrically connected, and two electrical components may be connected directly or indirectly between two electrical components. For example, a may be directly connected to B, or indirectly connected to B via one or more other electrical components.
In the circuit structure provided in the embodiments of the present application, the first node, the second node, and the like are not nodes representing actually existing components, but represent junction points of related coupling in the circuit diagram, that is, the nodes are equivalent nodes formed by the junction points of the related coupling in the circuit diagram.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The application provides a display calibration method, a display panel calibration system and a display device. The display panel in the embodiment of the application can be used for mobile phones, tablet computers, desktop computers, laptop computers, electronic readers, handheld computers, electronic display screens, notebook computers, ultra-mobile Personal Computer (UMPC), netbooks, cellular phones, personal digital assistants (Personal Digital Assistant, PDA), augmented Reality (Augmented Reality, AR) \virtual Reality (VR) devices, media players, wearable devices, digital cameras, car navigation devices, and the like.
The display panel may be a liquid crystal display panel. The present application is not limited to the type of liquid crystal display panel. The liquid crystal display panel provided by the application can be a horizontal electric field type liquid crystal display panel, such as a Fringe FieldSwitching, FFS (Fringe) or In-Plane Switching (IPS) type liquid crystal display panel, or a vertical electric field type liquid crystal display panel, such as a Twisted Nematic (TN) type liquid crystal display panel, or a Multi-domain vertical alignment (Multi-domain Vertical Alignment, MVA) type liquid crystal display panel.
A color standard correction flow of the display panel in the application is as follows: the Gamma and white point (white color coordinates) of the display panel are corrected to standard values by a set of dynamic Gamma correction tables (Digital Gamma Compensation Look-Up-Table, DGC LUT) as shown in fig. 1 below. The color level delta E is then corrected for the particular display area using a three-dimensional color Look-Up Table (3D Look-Up Table, 3D-LUT for short). The 3D-LUT format is shown in the following figure 2, and the overall mapping is performed through the combination of R/G/B three channels. If the input is (50, 50, 50), the corresponding output is (70, 70, 70), and for example, the input is (50, 50, 60), the output is (70, 75, 75), and the like. Therefore, after the original image data passes through the 3D-LUT, each color can be mapped independently, and color quasi correction is realized. However, after performing color level correction based on the original brightness color data of the central area of the display panel, the color level of the central area of the display panel may reach the standard, but the whole color level of the display panel may still have a problem.
The display calibration method, the display panel calibration system and the display device of the present application are described below with reference to the drawings in the specification to solve the above problems.
Referring to fig. 3, a flow chart of a display calibration method provided in an embodiment of the present application is applied to a display panel, a display area of the display panel includes at least three display partitions, the at least three display partitions include a first display partition and a second display partition, the first display partition is located in a central area of the at least three display partitions, and the second display partition is a display partition except for the first display partition in the at least three display partitions, as shown in fig. 3, the display calibration method includes:
s100, according to the first brightness and chrominance data of the first display partition and the second brightness and chrominance data of the second display partition, gamma compensation tables respectively corresponding to the second display partitions are obtained;
s200, respectively compensating the brightness value and the chromaticity value of the second display partition according to the gamma compensation table;
and S300, performing color quasi correction on the display area according to the three-dimensional color lookup table obtained after the brightness value and the chromaticity value are adjusted.
Specifically, the display panel includes a display area and a non-display area, and the display area may be divided into at least three display areas, that is, the display panel may be configured to be divided into N display areas, where N is a positive integer, and N is greater than or equal to 3. For example, the display area is divided into 3, 5, 6, 9, 12 or more display sections. For convenience of explanation, the embodiment of the present application is exemplarily illustrated with 9 display sections as shown in fig. 4, and as shown in fig. 4, the display area 100 includes at least three display sections including one first display section dgc_lut5, and 8 second display sections including dgc_lut1 to dgc_lut4, and dgc_lut6 to dgc_lut9, respectively. The pixel unit of the display panel may include a plurality of color monochrome light emitting devices (i.e., sub-pixels), including, for example, a red light emitting device, a green light emitting device, and a blue light emitting device.
The area sizes of the at least three display areas may be the same or different. The display area may be equally divided to obtain at least three display areas with the same area size, or the display area may be divided to obtain 1 first display area with the area size of a first value, and N-1 second display areas with the area size of a second value around the first display area mentioned in the following embodiments. For different display panels, the position or size of the first display section may be set as desired. For example, the first display partition of each display panel of the same batch, same gauge type, may be the same during the acquisition process.
The luminance and chrominance data may include luminance values as well as chrominance data, including hue and saturation of the color. The present application firstly obtains first luminance and chrominance data of a first display partition and second luminance and chrominance data of a second display partition in a display panel, and then, according to the first luminance and chrominance data and the second luminance and chrominance data, a gamma compensation table corresponding to each second display partition can be obtained through calculation in steps S110 to S130 in the following embodiments. And controlling each second display partition to adaptively adjust the voltage of each second display partition according to the gamma compensation table corresponding to each second display partition while keeping the brightness value and the chromaticity value of the currently displayed picture of the first display partition of the display panel unchanged, so that the difference between the brightness value and the chromaticity value of each second display partition after adjustment and the brightness value and the chromaticity value of the first display partition is reduced. In this way, on the premise that the luminance value and the chromaticity value of the first display partition and the second display partition, that is, the whole display area of the display panel, are basically consistent, that is, the difference of the luminance values of the first display partition and the second display partition is smaller than a first threshold value, and the difference of the chromaticity values of the first display partition and the second display partition is smaller than a second threshold value, the three-dimensional color lookup table obtained in the following embodiments S310 to S320 is used to perform color quasi delta E correction on the picture displayed in the whole display area of the display panel, so that the difference between the actual display effect and the expected display effect of the display panel is reduced, the color cast can be reduced, the uniformity of the luminance is improved, and the display effect is facilitated to be improved.
In some embodiments of the present application, the step S100 of obtaining the gamma compensation table corresponding to each of the second display partitions according to the first luminance and chrominance data of the first display partition and the second luminance and chrominance data of the second display partition includes:
s110, acquiring first luminance and chrominance data of the first display partition and second luminance and chrominance data of the second display partition;
s120, respectively obtaining a first display parameter of the first display partition and a second display parameter of the second display partition according to the first brightness and chrominance data and the second brightness and chrominance data;
s130, obtaining gamma compensation tables corresponding to the second display partitions according to the first display parameters and the second display parameters.
Specifically, when the display panel performs the image display, if only the actual luminance value and the target luminance value of the display panel are obtained, compensation display is performed according to the difference between the actual luminance value and the target luminance value, and only the luminance uniformity of the display panel can be realized, and the chromaticity value uniformity of the display panel cannot be ensured. Therefore, the first display parameter and the second display parameter acquired in the embodiment of the present application include the luminance value and the color coordinate mentioned in the following embodiment, that is, the first display parameter includes the first luminance value and the first color coordinate of the first display partition, and the second display parameter includes the second luminance value and the second color coordinate of the second display partition. The first display parameter may be obtained from the first luminance value of the first display section and its first color coordinates, and the second display parameter may be obtained from the second luminance value of the second display section and its second color coordinates.
In the embodiment of the application, the first display parameter of the first display partition located at the center point of the display area of the display panel is obtained as a reference for adjusting the uniformity of the chromaticity value of the display panel. In some embodiments, the first display parameter of the first display partition may be set as a standard display parameter of the display module, where the standard display parameter refers to a required value, and may specifically be set according to a user requirement or a user preference. In this embodiment of the present application, in order to achieve uniformity of a display panel, a first display parameter of a first display partition located in a central area in a display area may be selected as a standard display parameter of a second display partition for adjustment reference, so that a gamma compensation table corresponding to each second display partition may be calculated according to a difference between the first display parameter and the second display parameter.
In some embodiments of the present application, S110, the obtaining the first luminance and chrominance data of the first display section, and the second luminance and chrominance data of the second display section include:
s111, acquiring original brightness and chrominance data corresponding to a preset picture displayed by the display panel;
s112, acquiring first luminance and chrominance data of the first display partition according to coordinates of all sub-pixels in the first display partition and the original luminance and chrominance data;
S113, acquiring second luminance and chrominance data of the second display partition according to the coordinates of all sub-pixels in the second display partition and the original luminance and chrominance data.
Specifically, the preset frames include a solid color frame and a non-solid color frame, and the solid color frame includes a solid red frame, a solid green frame, a solid blue frame, a solid white frame, and the like. The original luminance and chrominance data can be obtained by taking a picture of a display panel displaying a preset picture by an imaging component, shooting and obtaining a target image when the display panel displays the preset picture with maximum gray-scale brightness, and obtaining the original luminance and chrominance data according to the target image. The imaging component can be a camera, a video camera and other photographing equipment. The shortest distance from the optical center of the lens of the imaging component to the display panel is smaller than the normal working distance of the imaging component. In this embodiment, the normal working distance of the imaging assembly is the working distance of the imaging assembly when the area in the display panel photographed by the imaging assembly does not have image distortion or when the image distortion is at a minimum.
After the target image is obtained from the imaging component, extracting original brightness and chrominance data corresponding to pixel units of all pixel points from the target image, wherein the original brightness data comprises brightness values and chrominance data. The brightness value refers to brightness of the image, and for gray level image, the brightness value of the image is the gray level value of the image, the range of the gray level value is 0-255, and the gray level value and the brightness value are in a proportional relation, namely, the higher the gray level value is, the brighter the image is. Therefore, gray scale processing can be performed on the target image to obtain gray scale values of all pixel points in the target image, so that corresponding brightness values can be obtained.
Of course, the process of obtaining the luminance value may also be extracting three primary color components of the target image, where each pixel has three components, and the three primary color components represent the gray-scale values of red, blue and green of the color of the pixel, and calculating the luminance of the pixel according to the three primary color components, that is, calculating the luminance value corresponding to the pixel according to the gray-scale values of red, blue and green after the conversion of the pixel, where the formula is:
L＝a1*R+a2*G+a3*B
wherein R represents a gray scale value of red, G represents a gray scale value of green, B represents a gray scale value of blue, and a1, a2 and a3 are constant coefficients respectively.
After the original luminance and chrominance data corresponding to the preset picture is obtained by the display panel through the embodiment, and the preset gray scale value luminance display is performed on the display panel, because the target image comprises the display panel, each pixel point in the target image corresponds to a sub-pixel in the display panel, and therefore the first luminance and chrominance data of the first display partition can be searched from the original luminance and chrominance data according to the conversion relation between the coordinates of each sub-pixel in the first display partition and the image coordinates of the sub-pixel in the target image. Similarly, the second luminance and chrominance data of the second display partition may be searched from the original luminance and chrominance data according to the conversion relationship between the coordinates of each sub-pixel in the second display partition and the image coordinates of the sub-pixel in the target image.
Preferably, the imaging component may not be located right in front of the display panel, so that the brightness of different areas of the target image may deviate to generate distortion, after the target image is obtained, the target image is subjected to view angle correction, and then original brightness and chrominance data corresponding to all pixel points respectively are extracted from the target image after the view angle correction, so that the problem that the compensation effect is affected due to the distortion of the brightness of the image of the display panel can be solved.
In some embodiments of the present application, the step of obtaining the first display parameter of the first display section and the second display parameter of the second display section according to the first luminance and chrominance data and the second luminance and chrominance data includes:
s121, according to the first brightness and chrominance data, determining first display parameters corresponding to three colors of red, green and blue, wherein the first display parameters comprise a first brightness value and a first color coordinate;
s122, determining second display parameters corresponding to the red, green and blue colors according to the second brightness data, wherein the second display parameters comprise a second brightness value and a second color coordinate.
Specifically, the color coordinates (chromaticity coordinate) are color coordinates, also called a color system or chromaticity coordinates. The color coordinates are used to determine a point on the chromaticity diagram, which accurately represents the hue and saturation of the color, generally by (x, y), in which color coordinates the abscissa thereof is denoted as x and the ordinate thereof is denoted as y, and there is a color coordinate, and a point (x, y) on the chromaticity diagram, which accurately represents the emission color, i.e., the color coordinates accurately represent the color, can be determined.
In the embodiment of the present application, unless otherwise specified, chromaticity of a color is represented by color coordinates (chromaticity coordinate), luminance of a color is represented by a luminance value, for example, a chromaticity value and a luminance value of one color may be represented directly in xyz form, where xy represents color coordinates, and z represents a luminance value. The color coordinates (x, y) and the luminance value z of each pixel unit in the display area of the display panel may be measured by a chromaticity measuring instrument, wherein each pixel unit is composed of three primary color sub-pixels, namely a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B, each primary color sub-pixel including a color coordinate and a luminance value.
And controlling all red sub-pixels of a display area of the display panel to display red solid-color pictures, measuring a first brightness value z1 and first color coordinates (x 1, y 1) of a first display partition on which the red solid-color pictures are displayed by a colorimetry instrument, converting the first brightness value z1 into a first red chromaticity value (x 1, y1, z 1) based on a standard colorimetry system conversion relationship, namely a conversion relationship (such as CIE1931 or CIE 2932) between a CIE-RGB system and a CIE-XYZ system, and further taking the first chromaticity value corresponding to the red color as the first display parameter corresponding to the first display partition on the red color. Similarly, the second display partition is used for displaying the second brightness value z2 and the second color coordinates (x 2, y 2) of the red solid-color picture, and the second brightness value z2 and the second color coordinates (x 2, y 2) are converted into the second chromaticity value (x 2, y2, z 2) of red based on the standard chromaticity system transformation relation, and then the second chromaticity value corresponding to red is used as the second display parameter corresponding to the first display partition in red. Similarly, the first display parameters corresponding to the first display partition in blue and green respectively and the second display parameters corresponding to the second display partition in blue and green respectively can be obtained respectively.
In some embodiments of the present application, the step S130 of obtaining the gamma compensation table corresponding to each of the second display partitions according to the first display parameter and the second display parameter includes:
s131, performing difference calculation on the first display parameters corresponding to the current color in the second display partition and the second display parameters corresponding to the current color in the first display partition to obtain display difference values of the second display partitions and the first display partition under the current color respectively;
and S132, obtaining a gamma compensation table corresponding to the second display partition according to the display difference value.
Specifically, the first display parameter of the first display partition may be set as a standard luminance parameter and a standard chrominance parameter of the display module, where the standard display parameter refers to a required value, specifically may be set according to a user requirement or a user preference, and when implementing, a preset luminance value and a preset chrominance value may be provided as a design requirement of the display module according to an actual situation.
In this embodiment of the present application, in order to achieve uniformity of the display panel, a first luminance value of a first display partition located in a central area of a display area may be selected as a preset luminance value, and a first chrominance value of the first display partition may be selected as a preset chrominance value. And carrying out difference value calculation on the second display parameter corresponding to the red color of any second display partition and the first display parameter corresponding to the red color of the first display partition to obtain a display difference value between the second display partition and the first display partition corresponding to the red color channel. And similarly, the display difference values between the second display partition and the first display partition corresponding to the green channel and the blue channel can be obtained, and then, the gamma compensation table corresponding to the current second display partition is obtained according to the respective corresponding display difference values of the current second display partition under the red, green and blue color channels. Thus, a gamma compensation table corresponding to each second display partition can be obtained.
In some embodiments of the present application, the display difference value includes a luminance value difference and a chrominance value difference, and the obtaining, according to the display difference value, the gamma compensation table corresponding to the second display partition includes:
obtaining a brightness compensation value applicable to the second display partition under the current color according to the brightness value difference of the second display partition and the first display partition under the current color;
obtaining a corresponding chromaticity compensation value applicable to the second display partition under the current color according to the chromaticity value difference of the second display partition and the first display partition under the current color;
and obtaining a gamma compensation table corresponding to the second display partition according to the brightness compensation value and the chromaticity compensation value.
Specifically, the original color value may be an RGB value, where R represents a red component of a color, G represents a green component of a color, and B represents a blue component of a color. After the display signal is obtained, the display values, i.e. color coordinates and luminance values (x, y, z), presented by the output signal on the display panel are the result of the simultaneous action of the individual color components, i.e. R, G and B components, in their original color, the action of the three color components on the color coordinates and luminance values presented finally on the display panel being different, and the action of the increase of the individual component of the three color components on the abscissa component x of the color coordinates presented finally, the ordinate component y of the color coordinates and the luminance value z being monotonic.
Therefore, a first difference value can be obtained by performing difference calculation according to an abscissa component of the first display parameter corresponding to the first display partition under the red channel and an abscissa component of the second display parameter corresponding to the current second display partition under the red channel, a second difference value can be obtained by performing difference calculation according to an ordinate component of the first display parameter corresponding to the first display partition under the red channel and an ordinate component of the second display parameter corresponding to the current second display partition under the red channel, and thus the first difference value and the second difference value are chromaticity value differences, and a third difference value is obtained by performing difference value calculation according to a luminance value of the first display parameter corresponding to the first display partition under the red channel and a luminance value of the second display parameter corresponding to the current second display partition under the red channel. According to the corresponding chromaticity value difference and the luminance value difference of the first display partition and the current second display partition under the red channel, the luminance compensation value and the chromaticity compensation value which are basically consistent with the luminance value and the chromaticity value of the red channel of the first display partition can be obtained by adjusting the red channel of the current second display partition. Similarly, the brightness compensation value and the chromaticity compensation value of the current green channel of the second display partition, which are basically consistent with the brightness value and the chromaticity value of the green channel of the first display partition, can be obtained, and the brightness compensation value and the chromaticity compensation value of the current blue channel of the second display partition, which are basically consistent with the brightness value and the chromaticity value of the blue channel of the first display partition, can be obtained, so that the brightness value and the chromaticity value of the current second display partition are regulated to the brightness compensation value and the chromaticity compensation value which are basically consistent with the brightness value and the chromaticity value of the first display partition under the red, green and blue color channels. The gamma compensation table comprises brightness compensation values and chromaticity compensation values corresponding to three colors of red, green and blue respectively.
In some embodiments of the present application, the performing color quasi-correction on the display area according to the three-dimensional color lookup table obtained after adjustment of the luminance value and the chrominance value includes:
s310, acquiring the three-dimensional color lookup table according to the brightness and color data of the first display subarea;
s320, performing color calibration on the first display subarea and the second display subarea according to the three-dimensional color lookup table.
Specifically, referring to embodiments S100 to S200 above, in the case where the display panel displays the preset screen, brightness adjustment is performed on each second display partition according to the gamma compensation table corresponding to each second display partition, after brightness values and chromaticity values of each second display partition in the display area are adjusted to be substantially consistent with those of the first display partition, brightness data corresponding to the first display partition is measured in real time by using the chromaticity measuring apparatus on the premise that the preset screen displayed by the display panel is unchanged, in order to achieve uniformity of the display panel, a three-dimensional color lookup table corresponding to the first display partition may be obtained according to the adjusted brightness data, then correction data for the first display partition is obtained according to the three-dimensional color lookup table of the first display partition and the brightness data of the first display partition, and color calibration is performed on the first display partition according to the correction data of the first display partition. And similarly, acquiring correction data aiming at the current second display subarea according to the three-dimensional color lookup table of the first display subarea and the adjusted brightness color data of the current second display subarea, and performing color quasi-calibration on the current second display subarea according to the correction data of the current second display subarea.
The method includes that after the brightness value and the chromaticity value of the second display partition are basically consistent with the brightness value and the chromaticity value of the first display partition, the input color parameter of any pixel point in the first display partition is obtained according to the brightness color data of the first display partition, the corresponding output color parameter can be searched from the three-dimensional color lookup table according to the input color parameter of any pixel point in the first display partition, the color parameter difference value between the searched input color parameter and the searched output color parameter is used as color calibration data of the color parameter, color calibration data of each sub-pixel in the first display partition can be obtained in the same way, and then the sub-pixels corresponding to the first display partition are calibrated according to the color calibration data corresponding to each sub-pixel in the first display partition. Similarly, the color calibration data of each sub-pixel in the second display partition may be used, and then the sub-pixels corresponding to the second display partition may be calibrated according to the color calibration data corresponding to each sub-pixel in the second display partition. The 3D-LUT comprises mapping relations between input color parameters and output color parameters of different colors, and further, when the colors need to be displayed, required color calibration data are searched in the 3D-LUT for display, so that the display effect which is finally and practically displayed is the same as the effect which needs to be displayed.
In some embodiments of the present application, the acquiring the three-dimensional color lookup table includes the steps of:
s311, obtaining output color parameters of a preset picture;
s312, after compensating the brightness value and the chromaticity value of the second display partition, acquiring brightness and chromaticity data of the first display partition, and acquiring input color parameters according to the brightness and chromaticity data of the first display partition;
s313, obtaining the three-dimensional color lookup table according to the mapping relation between the input color parameters and the output color parameters.
Specifically, a three-dimensional color lookup table 3D-LUT is created, the three-dimensional color lookup table 3D-LUT comprises a plurality of input color parameters and a plurality of output color parameters of a display panel and a mapping relation between the input color parameters and the output color parameters, and in summary, the 3D-LUT is a lookup table which is built according to the color deviation of a display picture of the display panel and comprises the mapping relation of the input color parameters and the output color parameters. Essentially, the output color parameter is a standard color parameter for the desired display, wherein the standard color parameter is a color parameter of the standard color. The input color parameter and the output color parameter refer to tristimulus values of the pixel points, namely, a red value (R), a green value (G) and a blue value (B). There are RGB channels for each coordinate direction in the 3D-LUT. For example, input color parameters (R in ，G in ，B in ) The signal, after 3D-LUT conversion, becomes an output color parameter (R out ，G out ，B out ) The transformed output color parameters (R out ，G out ，B out ) The target display effect of the display panel is the effect to be displayed.
For example, if the display panel displays a pure red picture, the output color parameter of any one pixel in the display panel is (255, 0), and similarly, if the display panel displays a pure blue picture, the output color parameter of any one pixel in the display panel is (0, 255), and if the display panel displays a pure green picture, the output color parameter of any one pixel in the display panel is (0, 255, 0).
Referring to the above embodiments S100 to S200, the display panel is controlled to display different preset pictures with uniform preset gray-scale brightness. After a plurality of input color parameters are acquired, a preset picture corresponding to a preset color (or a preset color gamut) can be displayed through the display panel, brightness adjustment is performed on each second display partition according to a gamma compensation table corresponding to each second display partition under the condition of the preset picture displayed by the display panel, brightness values and chromaticity values of each second display partition of a display area are adjusted to be basically consistent with those of a first display partition, on the premise that the preset picture displayed by the display panel is unchanged, brightness color data corresponding to a first display partition of a current preset color (or a preset color gamut) are measured in real time by using a chromaticity measuring instrument, input color parameters of any current sub-pixel of the first display partition can be acquired according to the brightness color data corresponding to the first display partition, and then a set of mapping relation of the current preset color (or the preset color gamut) is acquired according to standard color parameters corresponding to the input color parameters corresponding to one sub-pixel of the first display partition and preset picture, namely, the output color parameters. Similarly, multiple sets of mapping relationships of different preset colors (or preset color gamuts) can be obtained, and then a three-dimensional color lookup table of the first display partition is obtained.
In this embodiment, it is assumed that the display areas are all standard rectangular or square display areas, so as to facilitate division, and for the display areas of irregular graphics, the embodiment of the present application processes with small rectangles or small squares with equal division areas, for example: dividing the display area of the irregular graph into a plurality of small squares to obtain a display partition.
The embodiment of the application further provides a calibration system of a display panel, a display area of the display panel includes at least three display partitions, the at least three display partitions include a first display partition and a second display partition, the first display partition is located in a central area of the at least three display partitions, and the second display partition is a display partition except for the first display partition among the at least three display partitions, the system includes:
the processing module is used for obtaining gamma compensation tables corresponding to the second display partitions respectively according to the first luminance and chrominance data of the first display partition and the second luminance and chrominance data of the second display partition;
the compensation module is used for respectively compensating the brightness value and the chromaticity value of the second display partition according to the gamma compensation table;
And the calibration module is used for carrying out color quasi correction on the display area according to the three-dimensional color lookup table obtained after the brightness value and the chromaticity value are adjusted.
The embodiment of the application also provides a display panel, the display device comprises a display panel, a memory and a processor, wherein the memory stores a computer program, and the processor is used for running the computer program in the memory to execute the steps in the display calibration method in the embodiment corresponding to the figures.
The embodiment of the application also provides a display panel, wherein the storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor to execute the steps in the display calibration method in the embodiment corresponding to the figures.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing has described in detail a display calibration method, a display panel calibration system and a display device provided in the embodiments of the present application, and specific examples have been applied to illustrate the principles and embodiments of the present application, where the foregoing description of the embodiments is only for aiding in understanding the methods and core ideas of the present application; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above. Moreover, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the principles of the present application, and such modifications and variations are considered to be within the scope of the present application.
Claims (10)
1. A display calibration method, applied to a display panel, wherein a display area of the display panel includes at least three display partitions, the at least three display partitions include a first display partition and a second display partition, the first display partition is located in a central area of the at least three display partitions, and the second display partition is a display partition other than the first display partition among the at least three display partitions, the method comprising:
according to the first luminance and chrominance data of the first display partition and the second luminance and chrominance data of the second display partition, gamma compensation tables respectively corresponding to the second display partitions are obtained;
respectively compensating the brightness value and the chromaticity value of the second display partition according to the gamma compensation table;
and correcting the color quasi of the display area according to the three-dimensional color lookup table obtained after the brightness value and the chromaticity value are adjusted.
2. The display calibration method according to claim 1, wherein the obtaining the gamma compensation tables respectively corresponding to the second display sections according to the first luminance and chrominance data of the first display section and the second luminance and chrominance data of the second display section includes:
Acquiring first luminance and chrominance data of the first display partition and second luminance and chrominance data of the second display partition;
respectively acquiring a first display parameter of the first display partition and a second display parameter of the second display partition according to the first brightness and chrominance data and the second brightness and chrominance data;
and obtaining a gamma compensation table corresponding to each second display partition according to the first display parameters and the second display parameters.
3. The display calibration method of claim 2, wherein the obtaining the first luminance-color data of the first display section and the second luminance-color data of the second display section comprises:
acquiring original brightness and chrominance data corresponding to a preset picture displayed by the display panel;
acquiring first luminance and chrominance data of the first display partition according to coordinates of all sub-pixels in the first display partition and the original luminance and chrominance data;
and acquiring second luminance and chrominance data of the second display partition according to the coordinates of each sub-pixel in the second display partition and the original luminance and chrominance data.
4. The display calibration method according to claim 2, wherein the acquiring the first display parameter of the first display section and the second display parameter of the second display section according to the first luminance-chrominance data and the second luminance-chrominance data, respectively, includes:
Determining first display parameters corresponding to three colors of red, green and blue according to the first luminance and chrominance data, wherein the first display parameters comprise a first luminance value and a first color coordinate;
and determining second display parameters corresponding to the three colors of red, green and blue according to the second luminance and chrominance data, wherein the second display parameters comprise a second luminance value and a second color coordinate.
5. The display calibration method according to claim 4, wherein obtaining the gamma compensation table corresponding to each of the second display sections according to the first display parameter and the second display parameter includes:
performing difference calculation on the first display parameter corresponding to the current color in the second display partition and the second display parameter corresponding to the current color in the first display partition to obtain display difference values of the second display partitions and the first display partition under the current color respectively;
and obtaining a gamma compensation table corresponding to the second display partition according to the display difference value.
6. The display calibration method according to claim 5, wherein the display difference value includes a luminance value difference and a chrominance value difference, and the obtaining the gamma compensation table corresponding to the second display section according to the display difference value includes:
Obtaining a brightness compensation value applicable to the second display partition under the current color according to the brightness value difference of the second display partition and the first display partition under the current color;
obtaining a corresponding chromaticity compensation value applicable to the second display partition under the current color according to the chromaticity value difference of the second display partition and the first display partition under the current color;
and obtaining a gamma compensation table corresponding to the second display partition according to the brightness compensation value and the chromaticity compensation value.
7. The display calibration method according to any one of claims 1 to 6, wherein performing color quasi-correction on the display area according to the three-dimensional color lookup table obtained after adjustment of the luminance value and the chromaticity value comprises:
acquiring the three-dimensional color lookup table according to the brightness color data of the first display subarea;
and respectively carrying out color calibration on the first display subarea and the second display subarea according to the three-dimensional color lookup table.
8. The display calibration method of claim 7, wherein the step of obtaining the three-dimensional color look-up table comprises the steps of:
Obtaining output color parameters of a preset picture;
after compensating the brightness value and the chromaticity value of the second display partition, acquiring brightness and chromaticity data of the first display partition, and acquiring input color parameters according to the brightness and chromaticity data of the first display partition;
and obtaining the three-dimensional color lookup table according to the mapping relation between the input color parameters and the output color parameters.
9. A display panel calibration system, wherein a display area of the display panel includes at least three display partitions, the at least three display partitions including a first display partition and a second display partition, the first display partition being located in a center area of the at least three display partitions, the second display partition being a display partition of the at least three display partitions other than the first display partition, the system comprising:
the processing module is used for obtaining gamma compensation tables corresponding to the second display partitions respectively according to the first luminance and chrominance data of the first display partition and the second luminance and chrominance data of the second display partition;
the compensation module is used for respectively compensating the brightness value and the chromaticity value of the second display partition according to the gamma compensation table;
And the calibration module is used for carrying out color quasi correction on the display area according to the three-dimensional color lookup table obtained after the brightness value and the chromaticity value are adjusted.
10. A display device comprising a display panel, a memory storing a computer program and a processor for running the computer program in the memory to perform the steps of the display calibration method according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311871986.5A CN117746808A (en) | 2023-12-29 | 2023-12-29 | Display calibration method, display panel calibration system and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311871986.5A CN117746808A (en) | 2023-12-29 | 2023-12-29 | Display calibration method, display panel calibration system and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117746808A true CN117746808A (en) | 2024-03-22 |
Family
ID=90281367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311871986.5A Pending CN117746808A (en) | 2023-12-29 | 2023-12-29 | Display calibration method, display panel calibration system and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117746808A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118098176A (en) * | 2024-04-26 | 2024-05-28 | Tcl华星光电技术有限公司 | Image compensation method of display device and display device |
| CN119649735A (en) * | 2025-01-23 | 2025-03-18 | 合肥维信诺科技有限公司 | Display panel compensation method, device, terminal equipment and computer program product |
-
2023
- 2023-12-29 CN CN202311871986.5A patent/CN117746808A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118098176A (en) * | 2024-04-26 | 2024-05-28 | Tcl华星光电技术有限公司 | Image compensation method of display device and display device |
| CN119649735A (en) * | 2025-01-23 | 2025-03-18 | 合肥维信诺科技有限公司 | Display panel compensation method, device, terminal equipment and computer program product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7456843B2 (en) | Method and apparatus for improved color correction | |
| KR101367199B1 (en) | Image display device and method for revising display character thereof | |
| CN106128373B (en) | Image processing device with image compensation function and image processing method thereof | |
| EP2367348B1 (en) | Method for generating a lookup table for color correction for an image display device | |
| US20190221173A1 (en) | Calculation method for viewing-angle compensation of display device, viewing-angle compensation structure, and display device | |
| CN111968590B (en) | Picture display adjusting method and device, storage medium and display equipment | |
| TWI388220B (en) | Image processing method capable of reducing color shift | |
| CN117746808A (en) | Display calibration method, display panel calibration system and display device | |
| CN109246405B (en) | Method and system for adjusting uniformity of image tone | |
| KR20080043808A (en) | Methods and systems for automatically calibrating color displays | |
| CN111292697A (en) | Method for improving color cast of display device | |
| US20110148907A1 (en) | Method and system for image display with uniformity compensation | |
| CN112992059B (en) | Method and related device for adjusting Gamma of OLED display screen | |
| CN103383830B (en) | Method for viewing virtual display outputs | |
| CN112053650A (en) | Multi-screen color correction method and electronic device thereof | |
| WO2020000477A1 (en) | Color gamut correction method and apparatus | |
| CN108230406B (en) | Data processing method and electronic equipment | |
| WO2024000465A1 (en) | Method and apparatus for generating color mapping table, method and apparatus for correcting color mapping table, and medium and device | |
| US20200118503A1 (en) | Driving Method of Display Device and Display Device | |
| JP6976150B2 (en) | Correction data generation device, display device, correction data generation method and program | |
| CN113077742B (en) | Adjusting method and adjusting device of display panel and display panel | |
| CN108053802A (en) | The display methods and system of display device | |
| CN113920927B (en) | Display method, display panel and electronic equipment | |
| CN109410889A (en) | A kind of white balance adjustment method, device and electronic equipment | |
| CN118098176B (en) | Image compensation method of display device and display device |
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 |