CN109036244B - Mura compensation method and device for curved surface display screen and computer equipment - Google Patents
Mura compensation method and device for curved surface display screen and computer equipment Download PDFInfo
- Publication number
- CN109036244B CN109036244B CN201810823702.8A CN201810823702A CN109036244B CN 109036244 B CN109036244 B CN 109036244B CN 201810823702 A CN201810823702 A CN 201810823702A CN 109036244 B CN109036244 B CN 109036244B
- Authority
- CN
- China
- Prior art keywords
- area
- data corresponding
- curved surface
- compensation
- determining
- 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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The invention relates to a Mura compensation method, a Mura compensation device and computer equipment of a curved surface display screen, wherein a display area of the curved surface display screen comprises a curved surface area and a plane area; the method comprises the following steps: acquiring brightness data corresponding to the curved surface area and the plane area respectively; determining compensation data corresponding to the curved surface area and the plane area respectively according to the brightness data corresponding to the curved surface area and the plane area respectively and preset target brightness data; and respectively compensating the curved surface area and the plane area according to the compensation data respectively corresponding to the curved surface area and the plane area. The curved surface area and the plane area are respectively compensated by acquiring the brightness data respectively corresponding to the curved surface area and the plane area, and the display abnormity caused by directly utilizing the brightness data to compensate in the traditional technology is solved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a Mura compensation method and device for a curved surface display screen and computer equipment.
Background
With the rapid development of video display technology, large-size ultrahigh-resolution and ultra-narrow frame display technology becomes the focus of key competition of panel factories, however, as the size increases, the difficulty of process control of display panels increases, and the Mura is generated due to the deterioration of picture uniformity caused by manufacturing process control deviation. Among them, Mura refers to a display non-uniformity phenomenon of a display panel, which is generated due to factors such as process level and raw material purity, and is a common technical problem in the field of display technology.
In the conventional technology, each manufacturer uses a CCD camera to shoot a detection picture displayed by a display panel, respectively shoots three primary colors pictures displayed by the display panel through the CCD camera under a plurality of gray scales to acquire corresponding three primary color luminance data, and improves a Mura phenomenon according to corresponding compensation data of the luminance data respectively corresponding to the three primary colors to the display panel.
At present, curved display screens are popular with the public, but the compensation method in the traditional technology is only suitable for flat display screens. For a curved display screen, the technical problem that abnormal display of the curved display screen is caused by directly compensating brightness data acquired by a CCD camera is solved.
Disclosure of Invention
Therefore, it is necessary to provide a Mura compensation method and device for a curved display screen and a computer device, aiming at the technical problem that the display abnormality of the curved display screen is caused by directly compensating luminance data acquired by a CCD camera in the conventional technology.
A Mura compensation method of a curved surface display screen is provided, wherein a display area of the curved surface display screen comprises a curved surface area and a plane area; the method comprises the following steps: acquiring brightness data corresponding to the curved surface area and the plane area respectively; determining compensation data corresponding to the curved surface area and the plane area respectively according to the brightness data corresponding to the curved surface area and the plane area respectively and preset target brightness data; and respectively compensating the curved surface area and the plane area according to the compensation data respectively corresponding to the curved surface area and the plane area.
In one embodiment, the determining the compensation data corresponding to the curved surface area and the planar area according to the brightness data corresponding to the curved surface area and the planar area and the preset target brightness data includes: calculating a difference value between the brightness data corresponding to the plane area and the target brightness data, and determining compensation data corresponding to the plane area according to the difference value; and setting the compensation data corresponding to the curved surface area to be zero.
In one embodiment, the planar area is provided with pixels arranged in an array, and after the luminance data corresponding to the curved area and the luminance data corresponding to the planar area are obtained, the method further includes: dividing the plane area into a transition area and a normal area according to the number of the columns of the pixels in the plane area; the determining the compensation data respectively corresponding to the curved surface area and the plane area according to the brightness data respectively corresponding to the curved surface area and the plane area and the preset target brightness data comprises: determining compensation data corresponding to the curved surface area according to the brightness data corresponding to the curved surface area and preset target brightness data; determining compensation data corresponding to the transition area according to the brightness data corresponding to the transition area and preset target brightness data; and determining compensation data corresponding to the normal area according to the brightness data corresponding to the normal area and preset target brightness data.
In one embodiment, the curved surface area and the plane area are arranged adjacently, and the transition area is preset with a ratio coefficient; the dividing the planar area into a transition area and a normal area according to the number of the columns of the pixels in the planar area includes: determining the number N of pixel columns in the transition region according to the number of the pixel columns in the planar region and the ratio coefficient; determining a region corresponding to N columns of pixels adjacent to the curved surface region in the planar region as the transition region; determining an area of the planar area other than the transition area as the normal area.
In one embodiment, the determining compensation data corresponding to the planar area according to the difference value includes: determining a difference value between the brightness data corresponding to the normal area and the target brightness data as compensation data corresponding to the normal area; and reducing the difference value, and determining the reduced difference value as compensation data corresponding to the transition area.
In one embodiment, the reducing the difference value and determining the reduced difference value as compensation data corresponding to the transition region includes: and reducing the difference value column by column according to the position corresponding to each column of pixels in the transition region, and determining the reduced difference value column by column as compensation data of the pixels in the column corresponding to the transition region.
In one embodiment, the determining the compensation data corresponding to the transition region according to the brightness data corresponding to the transition region and preset target brightness data includes:
(ii) a Cn is compensation data corresponding to the nth row of pixels; kn is an arithmetic progression and represents a compensation coefficient of the nth row of pixels; l1 is target luminance data, and L2 is acquired actual luminance data.
In one embodiment, the number of pixel columns in the curved surface area is M; determining compensation data corresponding to the curved surface area according to the brightness data corresponding to the curved surface area and preset target brightness data, wherein the determining comprises the following steps:
(ii) a Wherein Cm is the m-thCompensation data corresponding to the column pixels; km is an arithmetic progression and represents a compensation coefficient of the mth column of pixels; l1 is target luminance data, and L2 is acquired actual luminance data.
A Mura compensation device of a curved surface display screen is characterized in that a display area of the curved surface display screen is divided into a curved surface area and a plane area; the device comprises: the brightness data acquisition module is used for acquiring brightness data corresponding to the curved surface area and the plane area respectively; the compensation data determining module is used for determining the compensation data corresponding to the curved surface area and the plane area respectively according to the brightness data corresponding to the curved surface area and the plane area respectively and preset target brightness data; and the compensation module is used for respectively compensating the curved surface area and the plane area according to the compensation data respectively corresponding to the curved surface area and the plane area.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the method of any of the above embodiments when the processor executes the computer program.
According to the Mura compensation method, the Mura compensation device and the computer equipment for the curved surface display screen, the brightness data corresponding to the curved surface area and the brightness data corresponding to the planar area are obtained, so that the compensation data corresponding to the curved surface area and the compensation data corresponding to the planar area are determined according to the brightness data corresponding to the curved surface area and the brightness data corresponding to the planar area and the preset target brightness data, and the curved surface area and the planar area are compensated according to the compensation data corresponding to the curved surface area and the planar area. The curved surface area and the plane area are respectively compensated by acquiring the brightness data respectively corresponding to the curved surface area and the plane area, so that the display abnormity caused by directly utilizing the brightness data to compensate in the traditional technology is solved. Furthermore, a transition area is arranged in the plane area, and compensation data corresponding to the transition area is reduced column by column according to the position corresponding to each column of pixels in the transition area, so that the display effect of the curved surface display screen is improved.
Drawings
FIG. 1a is a diagram illustrating an exemplary environment for implementing a Mura compensation method for a curved display screen;
FIG. 1b is a schematic flow chart illustrating a Mura compensation method for a curved display screen according to an embodiment;
FIG. 1c is a schematic view of a display area of a curved display screen in one embodiment;
FIG. 2 is a flowchart illustrating the step S120 according to one embodiment;
FIG. 3a is a schematic diagram of a display area of a curved display screen in one embodiment;
FIG. 3b is a flowchart illustrating the step S120 according to an embodiment;
FIG. 4 is a flow diagram illustrating the division of transition regions and normal regions in one embodiment;
FIG. 5 is a flowchart illustrating the step S220 according to one embodiment;
FIG. 6 is a schematic flow chart illustrating a Mura compensation method for a curved display screen according to an embodiment;
FIG. 7 is a block diagram of an apparatus for obtaining Mura compensation data according to one embodiment;
FIG. 8 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
The Mura compensation method for the curved-surface display screen can be applied to the application environment shown in FIG. 1 a. Wherein, a communication connection is established between the data processing device 130 and the image acquisition device 120. The image acquisition device 120 acquires an image of the detection picture displayed on the curved display screen 110 and extracts corresponding brightness data, then the image acquisition device 120 sends the brightness data of the detection picture to the data processing device 130, and the data processing device 130 processes the brightness data of the detection picture displayed on the curved display screen 110 to obtain compensation data corresponding to the detection picture. And burning the obtained compensation data into a flash memory of the curved surface display screen 140 to be compensated.
In one embodiment, referring to fig. 1b and fig. 1c, the present application provides a Mura compensation method for a curved display screen, wherein a display area 100 of a curved display screen 110 includes a curved area 160 and a flat area 150. The compensation method comprises the following steps:
and S110, acquiring brightness data corresponding to the curved surface area and the plane area respectively.
The curved display screen is formed by bending the display panel according to the mechanism composition, and the display area of the curved display screen comprises a curved area and a plane area. The curved display may be, but is not limited to, a plasma display, a Liquid Crystal Display (LCD), a light emitting diode display (LED), or an organic light emitting diode display (OLED). The curved surface display screen is provided with pixels which are arranged in an array mode, each pixel in the curved surface display screen is displayed based on brightness data of RGB three primary colors, and one pixel is composed of three sub-pixels of red R, green G and blue B. The light source of each sub-pixel may exhibit a different brightness level, represented by gray scale. The gray levels represent gradation levels of different brightness from the darkest to the brightest. The luminance data means that each pixel in the display area emits light to display a corresponding gray scale.
Specifically, the curved surface display screen displays a detection picture, and the detection picture is photographed through the image acquisition device to obtain an image of the detection picture. And extracts corresponding luminance data for each pixel of the detection picture image. And dividing the display area of the curved surface display screen into a curved surface area and a plane area, and extracting the brightness data corresponding to the curved surface area and the brightness data corresponding to the plane area by the image acquisition device. And sending the brightness data corresponding to the curved surface area and the brightness data corresponding to the flat surface area to a data processing device, namely, the data processing device obtains the brightness data corresponding to the curved surface area and the brightness data corresponding to the flat surface area.
And S120, determining compensation data corresponding to the curved surface area and the plane area respectively according to the brightness data corresponding to the curved surface area and the plane area respectively and preset target brightness data.
And the curved surface area and the plane area in the curved surface display screen are both provided with preset target brightness data. The preset target brightness data may be represented in gray scale. Specifically, firstly, the curved surface display screen displays a monitoring picture, and then the data processing device acquires brightness data corresponding to a curved surface region and brightness data corresponding to a flat surface region. In fact, the acquired luminance data has a little difference from the preset target luminance data, and therefore, the compensation data corresponding to the curved surface region can be determined through the luminance data corresponding to the curved surface region and the preset target luminance data. And determining compensation data corresponding to the plane area according to the brightness data corresponding to the plane area and preset target brightness data.
And S130, respectively compensating the curved surface area and the plane area according to the compensation data respectively corresponding to the curved surface area and the plane area.
In order to make the image displayed on the curved display screen reach the preset target brightness data, the display area needs to be compensated. Specifically, the curved surface area is compensated according to the compensation data corresponding to the curved surface area. And compensating the plane area according to the compensation data corresponding to the plane area.
In this embodiment, the luminance data corresponding to the curved surface area and the planar area are obtained to compensate the curved surface area and the planar area, respectively, so that the display abnormality caused by directly compensating the curved surface area by using the luminance data of the planar area in the conventional technology is solved.
In one embodiment, referring to fig. 2, determining the compensation data corresponding to the curved surface area and the planar area according to the luminance data corresponding to the curved surface area and the planar area and the preset target luminance data respectively includes the following steps:
s210, calculating a difference value between the brightness data corresponding to the plane area and the target brightness data.
And S220, determining compensation data corresponding to the plane area according to the difference.
And S230, setting the compensation data corresponding to the curved surface area to be zero.
Specifically, the curved surface display screen displays a pure-color gray scale picture corresponding to the three primary colors of RGB, the pure-color gray scale picture is preset with target luminance data, and the luminance data corresponding to the planar area can be acquired through the image acquisition device. In the plane area, the preset target luminance data is inconsistent with the actually acquired luminance data. A difference between the preset target luminance data and the actually acquired luminance data is calculated. In order to improve the display uniformity of the curved display screen, the compensation data corresponding to the planar area may be determined according to a difference between preset target luminance data and actually acquired luminance data. For example, the planar area displays a pure-color gray scale image corresponding to the R primary color, assuming that the target luminance data preset in the planar area, i.e., the preset gray scale, is 60, and the gray scale value of the R primary color corresponding to the actually detected image is 57, the difference between the preset target luminance data and the actually detected luminance data is 3, and the difference 3 needs to be used as compensation data to compensate the display effect of the R primary color.
Because the brightness data corresponding to the curved surface area acquired by the image acquisition device is inaccurate, the occupation ratio of the curved surface area in the display area of the curved surface display screen is very small, the display effect of the curved surface display screen is not greatly influenced, the curved surface area can not be compensated, that is, the compensation data corresponding to the curved surface area is set to be zero.
In this embodiment, it is considered that the area of the curved surface region is small, and when the display effect of the curved surface display screen is not greatly affected, the curved surface region is not compensated, only the plane region is compensated, and the Mura compensation of the curved surface display screen is completed.
In one embodiment, the planar area is provided with pixels arranged in an array. After acquiring the luminance data corresponding to the curved surface area 160 and the flat surface area 150, referring to fig. 3a, the method further includes: the planar area is divided into a transition area 320 and a normal area 310 according to the number of columns of pixels in the planar area 150. Referring to fig. 3b, determining the compensation data corresponding to the curved surface area and the planar area according to the luminance data corresponding to the curved surface area and the planar area and the preset target luminance data respectively includes:
s310, determining compensation data corresponding to the curved surface area according to the brightness data corresponding to the curved surface area and preset target brightness data.
And S320, determining compensation data corresponding to the transition area according to the brightness data corresponding to the transition area and preset target brightness data.
S330, determining compensation data corresponding to the normal area according to the brightness data corresponding to the normal area and preset target brightness data.
Specifically, the display area of the curved display screen comprises a plane area and a curved area, and the display area is provided with pixels arranged in an array. For example, X × Y pixels are arranged in the planar region, and the planar region has X rows of pixels and Y columns of pixels. The flat area 150 of the curved display screen may be divided into a transition area 320 and a normal area 310 by performing finer area division on the flat area 150 according to the number Y of columns of pixels in the flat area.
The curved surface display screen displays the detection picture, and the brightness data corresponding to the display area is detected through the image acquisition device. The plane area 150 is divided into a transition area 320 and a normal area 310, and the luminance data detected in the plane area includes luminance data corresponding to the transition area and luminance data corresponding to the normal area. Target brightness data are preset in a plane area of the curved surface display screen, due to factors such as process level and raw material purity, brightness data corresponding to the curved surface area are different from preset target brightness data, brightness data corresponding to the transition area are different from preset target brightness data, brightness data corresponding to the normal area are different from preset target brightness data, compensation data corresponding to the transition area are determined according to the brightness data corresponding to the curved surface area and the preset target brightness data, compensation data corresponding to the transition area are determined according to the brightness data corresponding to the transition area and the preset target brightness data, and compensation data corresponding to the normal area are determined according to the brightness data corresponding to the normal area and the preset target brightness data.
In this embodiment, in order to improve the compensated display effect, the plane area of the curved display screen is further divided into a transition area and a normal area, so that different compensation data can be generated for the transition area and the normal area respectively. Therefore, different areas are compensated according to different compensation data, and fine compensation of the curved-surface display screen is achieved.
In one embodiment, the curved surface area is disposed adjacent to a transition area, and the transition area is preset with a ratio coefficient. Referring to fig. 4, dividing the planar area into a transition area and a normal area according to the number of columns of the pixels in the planar area includes the following steps:
s410, determining the pixel column number N in the transition area according to the column number and the ratio coefficient of the pixels in the plane area.
And S420, determining a region corresponding to N columns of pixels adjacent to the curved surface region in the planar region as a transition region.
And S430, determining the area except the transition area in the plane area as a normal area.
The display area of the curved surface display screen comprises a curved surface area and a plane area, and a boundary line is arranged between the curved surface area and the plane area. The plane area is divided into a transition area and a normal area, and the curved area is arranged adjacent to the transition area. The transition region is provided with a duty factor in the planar region. The number of pixel columns N in the transition region may be based on the number of columns of pixels in the planar region and the duty factor. Specifically, the product of the number of columns of pixels in the planar area and the duty factor is equal to the number of columns of pixels N in the transition area. The curved surface area and the plane area are arranged adjacently, the number N of pixel columns in the transition area, namely N columns of pixels adjacent to the curved surface area in the plane area, is determined as the transition area in the plane area. Since the plane area is divided into the transition area and the normal area, an area other than the transition area in the plane area is determined as the normal area.
In the production process, the ratio coefficient of the transition area can be set according to the actual situation. For example, the number of columns of pixels in the planar area is 600, the duty factor may be set to 5%, and the number of columns of pixels in the transition area is 30. And determining a transition region from the boundary line of the curved surface region and the plane region to the region corresponding to the 30 th row of pixels along the direction of pointing the edge of the curved surface display screen to the center line of the curved surface display screen.
In one embodiment, referring to fig. 5, determining the compensation data corresponding to the planar area according to the difference includes the following steps:
and S510, determining the difference value between the brightness data corresponding to the normal area and the target brightness data as compensation data corresponding to the normal area.
And S520, reducing the difference, and determining the reduced difference as compensation data corresponding to the transition area.
The curved surface display screen displays a pure color gray scale picture corresponding to RGB three primary colors, target brightness data are preset in the pure color gray scale picture, and the brightness data corresponding to the plane area can be acquired through the image acquisition device. In the plane area, a difference value between preset target luminance data and actually acquired luminance data is calculated. The difference value includes a difference value corresponding to the normal region and a difference value corresponding to the transition region. The difference corresponding to the normal area is directly determined as the compensation data corresponding to the normal area.
In order to improve the display effect of the curved-surface display screen, a transition area exists between the curved-surface area and the normal area, because the compensation data corresponding to the normal area is the difference value between the preset target brightness data and the actually acquired brightness data, and the compensation data of the curved-surface area is set to be zero, the difference value corresponding to the transition area needs to be adaptively reduced, the reduced difference value is used for compensating the transition area, that is, the reduced difference value is determined as the compensation data corresponding to the transition area. Therefore, a transition zone, namely a transition zone, exists between the display effect of the normal zone and the effect of the curved surface zone, and the display effect of the curved surface display screen is further improved.
Further, reducing the difference value, and determining the reduced difference value as compensation data corresponding to the transition region, including: and reducing the difference value corresponding to each column of pixels in the transition region column by column according to the position corresponding to each column of pixels in the transition region, and determining the reduced difference value column by column as compensation data of the pixels in the column corresponding to the transition region.
The transition area is provided with a certain number of rows of pixels, and the number of the rows of pixels in the transition area can be numbered according to the position of each row of pixels in the transition area along a certain direction. And reducing the difference value corresponding to each column of pixels in the transition region column by column according to the column number of the pixels. For example, the direction from the edge of the curved display screen to the center line of the curved display screen is denoted as column 1 from the column pixel at the boundary between the transition region and the normal region, and so on, up to the column pixel at the boundary between the curved region and the flat region is denoted as column N. And reducing the difference value corresponding to each column of pixels in the transition area column by column along with the increase of the sequence number of each column of pixels in the transition area, and determining the reduced difference value column by column as compensation data of the corresponding column of pixels in the transition area.
In one embodiment, determining compensation data corresponding to the transition region according to the luminance data corresponding to the transition region and preset target luminance data includes:
cn is compensation data corresponding to the nth row of pixels; kn is an arithmetic progression and represents a compensation coefficient of the nth row of pixels; l1 is target luminance data, and L2 is acquired actual luminance data.
The number of pixel columns in the transition region is N, and compensation data corresponding to each column of pixels in the transition region changes column by column along with the position corresponding to each column of pixels. The compensation data corresponding to each column of pixels is related to the difference between the target brightness data and the actual brightness data of the column of pixels. In the transition region, each column of pixels is provided with a compensation coefficient, and the compensation coefficient of the nth column of pixels is represented by kn. And multiplying the compensation coefficient kn by the difference value between the target brightness data and the actual brightness data of the row of pixels to obtain compensation data Cn corresponding to the row of pixels in the transition region. Specifically, kn may be an arithmetic series.
Since the compensation data corresponding to each column of pixels in the transition region varies column by column with the position corresponding to each column of pixels, the number of terms in the arithmetic number column { kn } may be equal to the number of columns of pixels in the transition region, i.e., { kn } is also a number of terms N. If the edge of the curved-surface display screen points to the opposite direction of the center line of the curved-surface display screen, the compensation coefficient of the row of pixels at the boundary line between the transition region and the normal region may be set as the first term, that is, the compensation coefficient of the row of pixels at the boundary line between the transition region and the normal region is k1, and the compensation coefficient of the row of pixels at the boundary line between the curved-surface region and the transition region is set as the last term, that is, the compensation coefficient of the row of pixels at the boundary line between the transition region and the curved-surface region is kn. The values of k1 and kn can be set according to practical situations, for example, k1 can be equal to 1, and k1 can also be equal to 0.9; kn may be equal to 0.1 and kn may also be equal to 0.2. Similarly, the tolerance d1 of the arithmetic series { kn } can be set adaptively according to the display effect in the production process. The display effect is improved by the tolerance d1, so that the display effect between the normal area and the curved area has gradually changed transition.
Illustratively, if the direction pointing to the center line of the curved display panel along the edge of the curved display panel is from the row of pixels at the boundary between the curved region and the transition region, which is denoted as the 1 st row, i.e. the compensation coefficient of the row of pixels is k1, k1 may be equal to 1/N, and so on, and the row of pixels at the boundary between the transition region and the normal region is denoted as the nth row, i.e. the compensation coefficient of the row of pixels is kn, and the tolerance d1 is equal to 1/N, the terms of the equal difference number row { kn } are 1/N, 2/N, 3/N. If the number of pixel columns in the transition region is 10, the tolerance d1 is equal to 0.1, and the terms of the series of arithmetic units { kn } are 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and 1, respectively.
In one embodiment, the number of pixel columns in the curved surface area is M; according to the brightness data corresponding to the curved surface area and the preset target brightness data, determining compensation data corresponding to the curved surface area, including:
wherein Cm is compensation data corresponding to the mth row of pixels; km is an arithmetic progression and represents a compensation coefficient of the mth column of pixels; l1 is target luminance data, and L2 is acquired actual luminance data.
The number of pixel columns in the curved surface area is M, and compensation data corresponding to each column of pixels in the curved surface area changes column by column along with the position corresponding to each column of pixels. The compensation data corresponding to each column of pixels is related to the difference between the target brightness data and the actual brightness data of the column of pixels. In the curved surface area, each column of pixels is provided with a compensation coefficient, and the compensation coefficient of the mth column of pixels is represented by km. And multiplying the compensation coefficient km by the difference value between the target brightness data and the actual brightness data of the row of pixels to obtain compensation data Cm corresponding to the row of pixels in the transition region. In particular, km may be an arithmetic series.
Since the compensation data for each column of pixels in the transition region varies column by column with the location for each column of pixels, the number of terms in the arithmetic series { km } may be equal to the number of columns of pixels in the transition region, i.e., { km } is the number of terms M. If the edge of the curved surface display screen points to the opposite direction of the center line of the curved surface display screen, the compensation coefficient of the first column of pixels close to the edge of the curved surface display screen can be set as the first term, that is, the compensation coefficient of the column of pixels at the position is k1, the compensation coefficient of the column of pixels at the boundary line of the curved surface area and the transition area is set as the last term, that is, the compensation coefficient of the column of pixels at the position is km, and the values of k1 and km can be set according to the actual situation. Similarly, the tolerance d2 of the arithmetic progression { km } can be adaptively set according to the display effect during the production process.
For example, because the curved surface region is bent at two side walls of the curved surface display screen, according to the actual situation, the tolerance d2 of the arithmetic difference series { km } corresponding to the curved surface region can be set to be larger than the tolerance d1 of the arithmetic difference series { kn } corresponding to the transition region. The display effect is improved by the tolerance d2, so that the display effect between the plane area and the curved surface area has gradually changed transition.
For example, if the direction pointing to the center line of the curved display screen along the edge of the curved display screen is from the row of pixels at the edge of the curved area, the row is denoted as the 1 st row, i.e. the compensation coefficient of the row of pixels is k1, k1 may be equal to 1/N, and so on, and the row of pixels at the boundary between the curved area and the transition area is denoted as the M th row, and the tolerance d2 is equal to 1/M, the terms of the equal difference number row { kn } are 1/M, 2/M, 3/M. If the number of pixel columns in the curved region is 5, the tolerance d1 is equal to 0.2, and the terms of the arithmetic series { kn } are 0.2, 0.4, 0.6, 0.8, and 1, respectively.
In one embodiment, referring to fig. 6, the present application provides a Mura compensation method for a curved display screen, where a display area of the curved display screen includes a curved area and a flat area. The compensation method comprises the following steps:
s610, luminance data corresponding to the curved surface area and the plane area are obtained.
The display area of the curved surface display screen is divided into a curved surface area and a plane area, and the image acquisition device extracts brightness data corresponding to the curved surface area and brightness data corresponding to the plane area.
And S620, dividing the plane area into a transition area and a normal area according to the number of the columns of the pixels in the plane area.
The curved surface area and the transition area are arranged adjacently, and the ratio coefficient is preset in the transition area. The number of pixel columns N in the transition region may be determined according to the number of columns of pixels in the planar region and the duty factor. Thus, the area corresponding to the N columns of pixels adjacent to the curved surface area in the planar area is determined as a transition area, and the area other than the transition area in the planar area is determined as a normal area.
And S630, determining compensation data corresponding to the normal area.
And calculating the difference between the brightness data corresponding to the normal area and the target brightness data, and directly determining the difference corresponding to the normal area as compensation data corresponding to the normal area.
And S640, determining compensation data corresponding to the transition area.
And calculating the difference between the brightness data corresponding to the transition region and the target brightness data, and reducing the difference corresponding to each column of pixels in the transition region column by column according to the position corresponding to each column of pixels in the transition region. The pixel column number N in the transition region, and the compensation data corresponding to the nth column of pixels are calculated according to the following formula:
cn is compensation data corresponding to the nth row of pixels; kn is an arithmetic progression and represents a compensation coefficient of the nth row of pixels; l1 is target luminance data, and L2 is acquired actual luminance data.
If the direction along the edge of the curved display panel is opposite to the center line of the curved display panel, the row 1 is marked from the row of pixels at the boundary line of the transition region and the normal region, and the compensation coefficient corresponding to the first row of pixels is k 1. By analogy, the row pixels counted to the boundary between the curved surface region and the planar region are denoted as the nth row, the compensation coefficient corresponding to the nth row pixels is kn, and the tolerance d1 (d 1 is a positive number) is defined as the following general formula:
kn=k1-（N-1）*d1。
if the direction along the edge of the curved display panel points to the center line of the curved display panel, the row 1 is counted from the row of pixels at the boundary between the curved area and the transition area, and the compensation coefficient corresponding to the first row of pixels is k 1. By analogy, the row pixels counting to the boundary between the transition region and the normal region are denoted as the nth row, the compensation coefficient corresponding to the nth row pixels is kn, and the tolerance d1 (d 1 is a positive number) is defined as the following general formula:
kn=k1+（N-1）*d1。
and S650, determining compensation data corresponding to the curved surface area.
The number of pixel columns in the curved region is M. The compensation data corresponding to the curved surface area is calculated according to the following formula
Wherein Cm is compensation data corresponding to the mth row of pixels; km is an arithmetic progression and represents a compensation coefficient of the mth column of pixels; l1 is target luminance data, and L2 is acquired actual luminance data.
If the direction pointing to the center line of the curved display screen along the edge of the curved display screen is from the first row of pixels near the edge of the curved display screen, the first row of pixels is marked as the 1 st row, and the compensation coefficient corresponding to the first row of pixels is k 1. By analogy, the row pixels counting to the boundary between the curved surface region and the transition region are denoted as the Mth row, the compensation coefficient corresponding to the Mth row pixels is km, and the tolerance d2 (d 2 is a positive number) is defined as the following general formula:
km=k1+（N-1）*d2。
if the direction from the edge of the curved display panel to the center line of the curved display panel is opposite, the row 1 is counted from the row of pixels at the boundary between the curved area and the transition area, and the compensation coefficient corresponding to the first row of pixels is k 1. By analogy, the pixels in the row counting to the edge of the curved display screen are marked as the Mth row, the compensation coefficient corresponding to the pixels in the Mth row is km, and the tolerance d2 (d 2 is a positive number) is defined as the following general formula:
km=k1-（N-1）*d2。
it should be understood that although the various steps in the flow charts of fig. 1-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-6 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 7, a Mura compensation apparatus for a curved display screen is provided, the display area of the curved display screen being divided into a curved area and a flat area. The device comprises: a luminance data acquisition module 710, a compensation data determination module 720, and a compensation module 730, wherein:
the luminance data obtaining module 710 is configured to obtain luminance data corresponding to the curved surface area and the planar area respectively.
The compensation data determining module 720 is configured to determine the compensation data corresponding to the curved surface area and the planar area according to the brightness data corresponding to the curved surface area and the planar area, respectively, and the preset target brightness data.
The compensation module 730 is configured to compensate the curved surface area and the planar area according to the compensation data corresponding to the curved surface area and the planar area, respectively.
For specific limitations of the Mura compensation device for the curved display screen, reference may be made to the above limitations of the Mura compensation method for the curved display screen, and details are not repeated here. All or part of each module in the Mura compensation device of the curved surface display screen can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 8. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of obtaining Mura compensation data. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 8 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In an embodiment, a computer device is provided, comprising a memory in which a computer program is stored and a processor, which when executing the computer program performs the method steps in the above embodiments.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the method steps of the above-mentioned embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A Mura compensation method of a curved surface display screen is characterized in that a display area of the curved surface display screen comprises a curved surface area and a plane area; the method comprises the following steps:
acquiring brightness data corresponding to the curved surface area and the plane area respectively;
determining compensation data corresponding to the curved surface area according to the brightness data corresponding to the curved surface area and preset target brightness data; determining compensation data corresponding to the plane area according to the brightness data corresponding to the plane area and preset target brightness data;
compensating the curved surface area according to the compensation data corresponding to the curved surface area; compensating the plane area according to the compensation data corresponding to the plane area;
wherein the plane area comprises a transition area arranged adjacent to the curved area and a normal area except the transition area; the determining compensation data corresponding to the planar area according to the brightness data corresponding to the planar area and preset target brightness data includes: determining a difference value between the brightness data corresponding to the normal area and the target brightness data as compensation data corresponding to the normal area; and reducing the difference value, and determining the reduced difference value as compensation data corresponding to the transition area.
2. The method according to claim 1, wherein the determining compensation data corresponding to the curved surface area and the flat surface area according to the luminance data corresponding to the curved surface area and the flat surface area, respectively, and preset target luminance data comprises:
calculating a difference value between the brightness data corresponding to the plane area and the target brightness data, and determining compensation data corresponding to the plane area according to the difference value;
and setting the compensation data corresponding to the curved surface area to be zero.
3. The method according to claim 1, wherein the planar area is provided with pixels arranged in an array, and after the obtaining of the luminance data corresponding to the curved area and the planar area respectively, the method further comprises:
dividing the plane area into a transition area and a normal area according to the number of the columns of the pixels in the plane area;
the determining the compensation data respectively corresponding to the curved surface area and the plane area according to the brightness data respectively corresponding to the curved surface area and the plane area and the preset target brightness data comprises:
determining compensation data corresponding to the curved surface area according to the brightness data corresponding to the curved surface area and preset target brightness data;
determining compensation data corresponding to the transition area according to the brightness data corresponding to the transition area and preset target brightness data;
and determining compensation data corresponding to the normal area according to the brightness data corresponding to the normal area and preset target brightness data.
4. The method according to claim 3, wherein the transition region is preset with a duty factor; the dividing the planar area into a transition area and a normal area according to the number of the columns of the pixels in the planar area includes:
determining the number N of pixel columns in the transition region according to the number of the pixel columns in the planar region and the ratio coefficient;
determining a region corresponding to N columns of pixels adjacent to the curved surface region in the planar region as the transition region;
determining an area of the planar area other than the transition area as the normal area.
5. The method of claim 1, wherein the reducing the difference value and determining the reduced difference value as compensation data corresponding to the transition region comprises:
and reducing the difference value column by column according to the position corresponding to each column of pixels in the transition region, and determining the reduced difference value column by column as compensation data of the pixels in the column corresponding to the transition region.
6. The method according to any one of claims 3 to 5, wherein the determining the compensation data corresponding to the transition region according to the luminance data corresponding to the transition region and preset target luminance data comprises:
cn is compensation data corresponding to the nth row of pixels; kn is an arithmetic progression and represents a compensation coefficient of the nth row of pixels; l1 is target luminance data, and L2 is acquired actual luminance data.
7. The method according to any one of claims 1 to 5, wherein the number of pixel columns in the curved region is M; the determining the compensation data corresponding to the curved surface area according to the brightness data corresponding to the curved surface area and preset target brightness data includes:
wherein Cm is compensation data corresponding to the mth row of pixels; km is an arithmetic progression and represents a compensation coefficient of the mth column of pixels; l1 is target luminance data, and L2 is acquired actual luminance data.
8. A Mura compensation device of a curved surface display screen is characterized in that a display area of the curved surface display screen is divided into a curved surface area and a plane area; the device comprises:
a brightness data obtaining module for obtaining brightness data corresponding to the curved surface area and the plane area respectively
The compensation data determining module is used for determining the compensation data corresponding to the curved surface area according to the brightness data corresponding to the curved surface area and preset target brightness data; determining compensation data corresponding to the plane area according to the brightness data corresponding to the plane area and preset target brightness data;
the compensation module is used for compensating the curved surface area according to the compensation data corresponding to the curved surface area; compensating the plane area according to the compensation data corresponding to the plane area;
wherein the plane area comprises a transition area arranged adjacent to the curved area and a normal area except the transition area; the compensation data determining module is further configured to determine a difference between the luminance data corresponding to the normal region and the target luminance data as compensation data corresponding to the normal region; and reducing the difference value, and determining the reduced difference value as compensation data corresponding to the transition area.
9. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823702.8A CN109036244B (en) | 2018-07-25 | 2018-07-25 | Mura compensation method and device for curved surface display screen and computer equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823702.8A CN109036244B (en) | 2018-07-25 | 2018-07-25 | Mura compensation method and device for curved surface display screen and computer equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109036244A CN109036244A (en) | 2018-12-18 |
| CN109036244B true CN109036244B (en) | 2021-09-14 |
Family
ID=64644989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810823702.8A Active CN109036244B (en) | 2018-07-25 | 2018-07-25 | Mura compensation method and device for curved surface display screen and computer equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109036244B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110264977A (en) * | 2019-06-25 | 2019-09-20 | 惠科股份有限公司 | Display brightness adjustment method and device |
| CN110689843B (en) * | 2019-08-19 | 2021-10-12 | 昆山国显光电有限公司 | Demura system and method and electronic equipment |
| CN111025701B (en) * | 2019-12-30 | 2022-06-07 | 凌云光技术股份有限公司 | Curved surface liquid crystal screen detection method |
| CN111105745B (en) * | 2020-01-17 | 2024-02-09 | 深圳市华星光电半导体显示技术有限公司 | Compensation method and compensation system for curved display panel |
| CN111504610B (en) * | 2020-04-22 | 2022-11-22 | 苏州佳智彩光电科技有限公司 | Method and system for extracting brightness of curved surface screen |
| CN111369898B (en) * | 2020-04-23 | 2022-10-14 | 云谷（固安）科技有限公司 | Compensating device of display panel and display panel |
| CN113744675B (en) * | 2020-05-29 | 2024-01-30 | 北京小米移动软件有限公司 | Display effect adjusting method and device of display screen, electronic equipment and medium |
| CN112511761B (en) * | 2020-11-23 | 2022-07-08 | Oppo广东移动通信有限公司 | Curved screen display compensation method, device, equipment, storage medium and shooting equipment |
| CN112820231B (en) * | 2021-01-22 | 2023-08-11 | 惠州Tcl移动通信有限公司 | Method for balancing brightness of curved screen, intelligent terminal and computer readable storage medium |
| CN114187216A (en) * | 2021-11-17 | 2022-03-15 | 海南乾唐视联信息技术有限公司 | Image processing method and device, terminal equipment and storage medium |
| CN114609818B (en) * | 2022-03-10 | 2022-12-09 | 重庆惠科金渝光电科技有限公司 | Display compensation method of curved surface display panel, curved surface screen and display device |
| CN114549533B (en) * | 2022-04-28 | 2022-09-06 | 深圳百里科技有限公司 | Template image storage method, device, equipment and storage medium |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102145533B1 (en) * | 2012-10-04 | 2020-08-18 | 삼성전자주식회사 | Flexible display apparatus and control method thereof |
| KR101950473B1 (en) * | 2012-10-05 | 2019-02-21 | 삼성디스플레이 주식회사 | Flexible display panel |
| KR102261876B1 (en) * | 2015-01-06 | 2021-06-07 | 삼성디스플레이 주식회사 | Display device and driving method thereof |
| KR102537463B1 (en) * | 2016-01-20 | 2023-05-30 | 삼성디스플레이 주식회사 | Stain compensating apparatus for display panel, method of compensating stain using the stan compensating apparatus and method of driving display panel having the method of compensating stain |
| US10185064B2 (en) * | 2016-10-26 | 2019-01-22 | Microsoft Technology Licensing, Llc | Curved edge display with controlled luminance |
| CN107086021B (en) * | 2017-04-20 | 2019-11-19 | 京东方科技集团股份有限公司 | The mura compensation system and method for display screen |
| CN108196810A (en) * | 2017-12-21 | 2018-06-22 | 努比亚技术有限公司 | A kind of multi-screen display method, terminal and computer readable storage medium |
-
2018
- 2018-07-25 CN CN201810823702.8A patent/CN109036244B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109036244A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109036244B (en) | Mura compensation method and device for curved surface display screen and computer equipment | |
| CN108877740B (en) | Method and device for acquiring Mura compensation data, computer equipment and storage medium | |
| CN108877631B (en) | Mura compensation method and device for display screen, computer equipment and storage medium | |
| US11538392B2 (en) | Display substrate, method for driving the same, display device, and fine metal mask | |
| CN110134353B (en) | Color compensation method, compensation device and display device | |
| JP6874157B2 (en) | Display panel unevenness correction method and display panel | |
| CN108877630B (en) | Method and device for acquiring Mura compensation data, computer equipment and storage medium | |
| US10636345B2 (en) | Method of compensating in display panel, driving unit and display panel | |
| US20210358379A1 (en) | Display substrate, method for driving the same, display device, and high-precision metal mask | |
| CN104699438B (en) | The apparatus and method handled the picture to be shown of OLED display | |
| KR102509023B1 (en) | Display apparatus and method for generating compensation information of color deflection of the same | |
| WO2015180336A1 (en) | Display device brightness compensation method, brightness compensation apparatus, and display device | |
| CN107203056B (en) | Mura processing method for ultrahigh-resolution panel | |
| US20160027359A1 (en) | Display method and display device | |
| CN110880297B (en) | Display panel brightness adjusting method and device and display device | |
| CN110364116B (en) | Gray scale compensation method, gray scale compensation device and display module | |
| US20150116384A1 (en) | Display device and compensation method for the same | |
| CN110073433B (en) | Display compensation method, display compensation device, display device, and storage medium | |
| US20150356929A1 (en) | Display device for correcting display non-uniformity | |
| CN113920917B (en) | Display panel compensation method and compensation device | |
| KR100741971B1 (en) | Driving Method of Organic Electro Luminescence Display Device | |
| CN109712569A (en) | A kind of method and OLED display panel reducing display color difference | |
| CN108877612B (en) | Mura compensation method and device for display screen, display screen and computer equipment | |
| TWI547923B (en) | Display panel and driving method | |
| US20230102440A1 (en) | System and method for variable area-based compensation of burn-in in display panels |
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 |