WO2022126337A1 - 伽马校正方法及装置、电子设备和可读存储介质 - Google Patents

伽马校正方法及装置、电子设备和可读存储介质 Download PDF

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Publication number
WO2022126337A1
WO2022126337A1 PCT/CN2020/136234 CN2020136234W WO2022126337A1 WO 2022126337 A1 WO2022126337 A1 WO 2022126337A1 CN 2020136234 W CN2020136234 W CN 2020136234W WO 2022126337 A1 WO2022126337 A1 WO 2022126337A1
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Prior art keywords
gamma correction
display area
display
grayscale
brightness
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PCT/CN2020/136234
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English (en)
French (fr)
Inventor
韩婷
朱元章
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京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Priority to CN202080003332.9A priority Critical patent/CN114981873B/zh
Priority to US18/038,200 priority patent/US12002401B2/en
Priority to PCT/CN2020/136234 priority patent/WO2022126337A1/zh
Publication of WO2022126337A1 publication Critical patent/WO2022126337A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G3/2096—Details of the interface to the display terminal specific for a flat panel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of display technology, and in particular, to a gamma correction method and device, an electronic device and a readable storage medium.
  • AMOLED Active Matrix/Organic Light Emitting Diode
  • the low-density pixel area (L area) is not affected by the pixel density problem.
  • the effect of high-density areas cannot be achieved. Therefore, it is necessary to debug the same new H+L display module with gamma correction equipment in both the H area and the L area. It greatly increases the production cost of the panel factory; on the other hand, the simultaneous display of the H area and the L area requires the display module to have a chip with high pixel and low pixel gamma register setting and adjustment. Passing time is long.
  • Embodiments of the present application provide a gamma correction method and apparatus, an electronic device, and a readable storage medium.
  • Embodiments of the present application provide a gamma correction method for a display panel.
  • the display panel includes a first display area and a second display area, the pixel density of the first display area is smaller than the pixel density of the second display area, and the gamma correction method includes: controlling the first display area to display a test screen; perform gamma correction on the first display area to obtain first gamma correction data; control the second display area to display the test screen according to the first gamma correction data; acquire the second display
  • the current display brightness corresponding to the test picture is displayed in the first display area; when the current display brightness is the same as the display brightness corresponding to the preset pixel grayscale displayed in the first display area, the current display brightness is displayed according to the second display area.
  • the corresponding grayscale brightness and the preset pixel grayscale determine the remapping parameter of the second display area; the second gamma is obtained by compensating the first gamma correction data according to the remapping parameter Correction data; controlling the second display area to display according to the second gamma correction data.
  • the determining the remapping parameter of the second display area according to the grayscale brightness corresponding to the second display area displayed at the current display brightness and the preset pixel grayscale includes: determining the target pixel gray level corresponding to the gray level brightness of the current display brightness in the second display area; determining the remapping parameter according to the ratio of the target pixel gray level and the preset pixel gray level.
  • the target pixel grayscale corresponding to the grayscale brightness of the grayscale brightness that is determined to be displayed in the current display brightness in the second display area is calculated by the following conditional expression:
  • L vH-spec is the grayscale brightness of the current display brightness displayed in the second display area
  • Lvi is the grayscale brightness corresponding to the preset pixel grayscale displayed in the first display area
  • i is the preset Pixel grayscale value
  • Gray H-spec is the target pixel grayscale corresponding to the grayscale brightness of the current display brightness displayed in the second display area
  • Gamma is the gamma correction parameter value.
  • the obtaining second gamma correction data by compensating the first gamma correction data according to the remapping parameter includes: compensating the first gamma correction data according to the remapping parameter Compensation processing is performed on the grayscale of the pixel to obtain the second gamma correction data.
  • controlling the second display area to display according to the second gamma correction data includes: controlling the second display according to the second gamma correction data based on a luminance uneven compensation algorithm area is displayed.
  • performing gamma correction on the first display area to obtain first gamma correction data includes: performing a gamma correction on the first display area from the highest pixel gray level to the lowest pixel gray level
  • the pixel gray-scale binding points are respectively debugged to obtain multiple gray-scale intensities corresponding to the multiple pixel gray-scale binding points respectively; and the gray-scale brightness corresponding to the multiple pixel gray-scale binding points is combined to obtain the first Gamma corrected data.
  • the method further includes: controlling the first display area to display according to the first gamma correction data based on a luminance uneven compensation algorithm.
  • Embodiments of the present application provide a gamma correction device for a display panel.
  • the gamma correction device is electrically connected to the acquisition device, the display panel includes a first display area and a second display area, the pixel density of the first display area is smaller than that of the second display area, and the gamma
  • the correction device includes: a first control module, a first adjustment module, a second control module, an acquisition module, a determination module, a compensation module and a second adjustment module.
  • the first control module is used to control the first display area to display a test image; the first adjustment module is used to perform gamma correction on the first display area to obtain first gamma correction data; the first adjustment module Two control modules are used to control the second display area to display the test image according to the first gamma correction data; the acquisition module is used to acquire the second display area collected by the acquisition device to display the test image The current display brightness corresponding to the screen; the determining module is configured to, when the current display brightness is the same as the display brightness corresponding to the preset pixel grayscale displayed in the first display area, determine the current display brightness according to the second display area.
  • the corresponding gray-scale brightness and the preset pixel gray-scale during display brightness display determine the remapping parameter of the second display area; the compensation module is used for correcting the first gamma correction data according to the remapping parameter. Compensation is performed to obtain second gamma correction data; the second adjustment module is configured to control the second display area to display according to the second gamma correction data.
  • Embodiments of the present application further provide an electronic device.
  • the electronic device includes a processor and a memory, the memory stores a computer program, and when the computer program is executed by the processor, implements the gamma correction method described in any one of the foregoing embodiments.
  • Embodiments of the present application also provide a non-volatile computer-readable storage medium for a computer program.
  • the computer program is executed by one or more processors, the gamma correction method described in any one of the above embodiments is implemented.
  • the gamma correction method and device, the electronic device and the readable storage medium of the present application compensate the first gamma correction data according to the remapping parameter to obtain the second gamma correction data, so as to realize the gamma correction of different display areas in the display panel, Gamma characteristics of different regions can be adjusted to a consistent state without adding equipment and new chips.
  • FIG. 1 is a schematic structural diagram of an electronic device according to some embodiments of the present application.
  • FIG. 2 is a schematic structural diagram of an electronic device according to some embodiments of the present application.
  • 3a is a schematic diagram of a scene of a gamma correction method according to some embodiments of the present application.
  • 3b is a schematic diagram of a scene of a gamma correction method according to some embodiments of the present application.
  • FIG. 4 is a schematic structural diagram of a pixel in a second display area according to some embodiments of the present application.
  • FIG. 5 is a schematic structural diagram of a pixel in a first display area according to some embodiments of the present application.
  • FIG. 6 is a schematic flowchart of a gamma correction method according to some embodiments of the present application.
  • FIG. 7 is a schematic flowchart of a gamma correction method according to some embodiments of the present application.
  • FIG. 8 is a schematic flowchart of a gamma correction method according to some embodiments of the present application.
  • FIG. 9 is a schematic diagram of the relationship between an input grayscale and an output grayscale in a gamma correction method according to some embodiments of the present application.
  • FIG. 10 is a schematic diagram of the relationship between the pixel gray scale and the brightness of the display area in the gamma correction method according to some embodiments of the present application.
  • FIG. 11 is a schematic diagram of a scene of a gamma correction method according to some embodiments of the present application.
  • FIG. 12 is a schematic structural diagram of a gamma correction device according to some embodiments of the present application.
  • FIG. 13 is a schematic structural diagram of a first adjustment module in a gamma correction device according to some embodiments of the present application.
  • FIG. 14 is a schematic structural diagram of a determination module in a gamma correction device according to some embodiments of the present application.
  • 15 is a schematic structural diagram of an electronic device according to some embodiments of the present application.
  • FIG. 16 is a schematic structural diagram of a computer-readable storage medium according to some embodiments of the present application.
  • FIG. 1 and FIG. 2 are schematic diagrams of the structure of the current new type of display panel (AMOLED module in H area + L area), where H represents the normal display area, and the pixel density in H area is shown in Figure 4
  • L represents the display area in the camera area
  • the pixel density of the L area is arranged as shown in Figure 5.
  • the high pixel density (High PPI) is about 398
  • the low pixel density (Low PPI) is about 199 .
  • H+L indicates that there are two display architectures combining high and low pixel densities in a module display area.
  • the low-density pixel area (L area) is not affected by the pixel density problem.
  • the effect of high-density areas cannot be achieved. Therefore, it is necessary to debug the same new H+L display module with gamma correction equipment in both the H area and the L area. It greatly increases the production cost of the panel factory; on the other hand, the simultaneous display of the H area and the L area requires the display module to have a chip with high pixel and low pixel gamma register setting and adjustment. Passing time is long.
  • the present application provides a gamma correction method for a display panel.
  • the second gamma correction data is obtained by compensating the first gamma correction data according to the remapping parameter, so as to realize the gamma correction of different display areas in the display panel, Gamma characteristics of different regions can be adjusted to a consistent state without adding equipment and new chips.
  • the display panel 20 is a display device in the electronic device 100 .
  • the display panel 20 includes a first display area 21 and a second display area 22 , and the pixel density of the first display area 21 is smaller than that of the second display area 22 .
  • the electronic device 100 may be a smart device with a display panel, such as a mobile phone, a computer, and an ipad.
  • the gamma correction method includes the following steps:
  • the first display area 21 refers to a low-density pixel area (L area), which may be arranged in the upper middle area of the display panel 20 (as shown in FIG. 1 ), or may be arranged in the four corner areas of the display panel 20 ( as shown in picture 2).
  • the second display area 22 refers to a high-density pixel area (H area), which is an area other than the first display area 21 in the display panel 20 .
  • the first gamma correction data refers to the data of the corresponding conversion relationship between the input voltage and the luminance obtained by gamma correction in the L region.
  • the first display area L is controlled to display a test image
  • the test image may be a white image, a red image, a yellow image, or other pixel images of the same color.
  • the embodiment of the present application is described by taking the test image as a white image as an example.
  • Gamma correction is performed on the L area of the first display area to obtain gamma correction data, that is, the process of adjusting the input voltage of the L area so that the brightness of the L area is at a different pixel gray level, after the gamma correction is performed on the L area.
  • the luminance and chromaticity of the L area meet the target specifications.
  • the acquisition device 50 small probe gamma device
  • the electrical connection may refer to a wireless connection or a wired connection, which is not limited here.
  • the acquisition device 50 may be a device externally connected to the gamma correction device 10 (as shown in FIG.
  • the acquisition device 50 such as a small probe gamma device
  • the gamma correction method obtains the first gamma correction data by acquiring the brightness data collected by the small probe gamma device and the input voltage corresponding to the L area, thereby realizing the gamma correction on the first display area L.
  • the gamma correction refers to the first gamma correction data obtained by the gamma correction process, which refers to the data of the corresponding conversion relationship between the input voltage and the luminance in the L area of the screen.
  • the H area uses the same first gamma correction data of the L area to control the display of the H area, and the first gamma correction data is stored and programmed in the IC chip.
  • the probe gamma device captures the display brightness.
  • the second display area uses the same first gamma correction data as the first display area, and the second display area can be determined according to the first gamma correction data Apply the remapping parameters corresponding to the gamma correction parameters corresponding to the first display area, so that the second display area can use the remapping parameters to compensate the gamma correction data to obtain the second gamma correction data, thereby controlling the second display area in the same pixel.
  • grayscale the same brightness and chromaticity effects as those of the first display area can be achieved.
  • the second display area is controlled to display the test image according to the first gamma correction data, that is, the input voltage of the display panel can be adjusted to control the second display area to display the target test image corresponding to the preset pixel gray scale
  • the preset pixel Grayscale is 1st grayscale, 2nd grayscale, 5th grayscale, 10th grayscale, 20th grayscale, 25th grayscale, 30th grayscale, 40th grayscale, 50th grayscale, 100th grayscale Grayscale and other grayscale binding points
  • the target test picture is the display picture of the second display area corresponding to the preset pixel grayscale of the first display area.
  • the current display brightness corresponding to the target test picture in the second display area is acquired according to the target test picture.
  • the data of the current display brightness refers to the input voltage value U corresponding to the time when the H region is adjusted to the brightness consistent with the current display brightness of the L region.
  • the gamma correction method of the present application obtains the second gamma correction data by compensating the first gamma correction data according to the remapping parameters, so as to realize the gamma correction of different display areas in the display panel, without adding equipment and new chips.
  • the gamma properties of the different regions are adjusted to a consistent state.
  • step S12 includes:
  • S121 Debugging a plurality of pixel grayscale binding points from the highest pixel grayscale to the lowest pixel grayscale in the first display area, respectively, to obtain a plurality of grayscale luminances corresponding to the plurality of pixel grayscale binding points;
  • multiple pixel grayscale binding points from the highest pixel grayscale to the lowest pixel grayscale are respectively debugged, that is, for example, the highest pixel grayscale is the 255th grayscale, and the lowest pixel grayscale is the th 0 grayscale, there are a total of 255 grayscales, and multiple pixel grayscale binding points can be arbitrarily selected as multiple grayscales from the 255 grayscales, for example, 5 grayscales are selected, which are the 50th grayscale and 100th Grayscale, 150th grayscale, 200th grayscale, and 250th grayscale.
  • the corresponding debugging drives the driver displayed in the first display area.
  • voltage value, and the corresponding 5 driving voltage values are obtained as gray-scale brightness.
  • the first gamma correction data is obtained by combining the five pixel grayscales and the corresponding five grayscale intensities, that is, the final first gamma correction data includes the pixel grayscale values and the corresponding grayscale intensities.
  • the gamma correction method further includes: controlling the first display area to display according to the first gamma correction data based on a luminance uneven compensation algorithm.
  • the principle of the brightness uneven compensation algorithm (Demura) is to brighten the dark areas in the picture, or darken the bright areas, or eliminate the color cast areas.
  • the input grayscale refers to the original pixel grayscale of the image input to the first display area by the user, that is, the pixel grayscale of the image before gamma correction is performed on the display area.
  • the input gray level is processed according to the brightness uneven compensation algorithm (Demura), that is, the original pixel gray level is processed by the brightness uneven compensation algorithm to obtain the gamma-corrected pixel gray level in the first display area.
  • Gray - out represents the output grayscale (or pixel grayscale)
  • Gray -in represents the input grayscale
  • Gain represents the gain value
  • Offset represents the compensation value
  • step S15 includes:
  • S152 Determine the remapping parameter according to the ratio of the gray level of the target pixel and the gray level of the preset pixel.
  • the gamma correction method of the present application can determine the target pixel grayscale corresponding to the current display brightness of the H region according to the following formula:
  • L vH -spec is the grayscale brightness of the current display brightness displayed in the second display area (H area)
  • Lvi is the grayscale corresponding to the preset pixel grayscale displayed in the first display area (L area).
  • Brightness, i is the preset pixel grayscale value
  • Gray H-spec is the target pixel grayscale corresponding to the grayscale brightness of the currently displayed brightness described in the H area
  • Gamma is the gamma correction parameter value, that is, the gamma correction index
  • the gamma correction parameter values can be 1.8, 2.0, 2.2, 2.4 and 2.6, and different gamma correction parameter values represent different values of brightness adjustment.
  • Gamma 2.2 is currently the Windows and Apple standard, monitors using Gamma 2.2 can produce nearly the best color, this level provides the best balance for true color and is used as the standard for graphics and video professionals, Therefore, in this application, the gamma correction parameter value Gamma is 2.2 as an example for description.
  • L vH-spec is the gray-scale brightness of the current display brightness displayed in the second display area (H area)
  • L v255 is the first display area (L area) corresponding to when the preset pixel gray-scale is 255.
  • the grayscale brightness of , Gray H-spec is the grayscale of the target pixel corresponding to the grayscale brightness of the current display brightness described in the H area
  • Gamma is the gamma correction parameter value, that is, the gamma correction index.
  • the gamma correction parameter value can be are 1.8, 2.0, 2.2, 2.4 and 2.6, and different gamma correction parameter values represent different values of brightness adjustment.
  • Gamma 2.2 is currently the Windows and Apple standard, monitors using Gamma 2.2 can produce near-optimal color, this level provides the best balance for true color and is used as the standard for graphics and video professionals, therefore, In this application, the gamma correction parameter value Gamma is 2.2 as an example for description.
  • the value of the remapping parameter Remap can be calculated according to the following conditional expression:
  • the remapping parameter Remap 239/255.
  • the gain value (Gain) in the H area is limited to remap*Gain, at this time
  • the displayed gray-scale Gray-out of the gamma-corrected output of the H region can be expressed as the following formula:
  • Gray -out Gray -in *Remap*Gain+Offset
  • Gray - out represents the output grayscale
  • Gray -in represents the input grayscale
  • Gain represents the gain value
  • Offset represents the compensation value
  • the brightness uneven compensation algorithm brightens the areas it considers to be dark, or darkens the bright areas, or eliminates the areas with color casts.
  • the ultimate goal is to make different areas in the display panel. With roughly the same color, a smooth demura algorithm is needed to remove the Mura boundary.
  • the remapping parameter (remap) of the second display area (H area) is determined according to the current display brightness and the preset pixel grayscale, and the remap parameter (remap) may be the grayscale value corresponding to the current display brightness value and the current brightness value.
  • the ratio of the corresponding grayscale values For example, when the input voltage value is U, the luminance value of the first display area L area is the luminance value L1 that meets the target specification. Due to the high pixel density of the H area, the current display luminance value of the second display area H area will be higher than that of the second display area.
  • the brightness value L1 is larger, assuming that the brightness value is L2, for example, the number of gray scales corresponding to the brightness value L2 is the 255th level, then the brightness value L1 is used as the current display brightness value of the second display area H area, according to the gamma
  • the pixel grayscale of the first gamma correction data is the 255th grayscale
  • the output grayscale of the L region is the 255th grayscale
  • the input grayscales of the remaining H area pixels are multiplied by the remap parameter remap to obtain the second gamma correction data of the second display area (H area). Then, the second display area is controlled to display according to the second gamma correction data based on the luminance uneven compensation algorithm.
  • both the L area and the H area can meet the gamma2.2 curve (as shown in Figure 10).
  • the current display brightness and chromaticity are consistent with the target specification requirements, as shown in Figure 11: Use this principle to simulate the white screen results of matlab.
  • the gamma2.2 curve is a gamma correction target specification curve preset by the user, and it can also be a gamma2.4 curve or other gamma curve, which is not limited here.
  • the present application determines the remapping parameter remap of the second display area according to the current display brightness data, and compensates the first gamma correction data obtained after the gamma correction in the L area according to the remapping parameter remap to obtain the second gamma correction data, and then Based on the brightness uneven compensation algorithm, the second display area is controlled to display according to the second gamma correction data. Finally, both the L area and the H area of the display panel can satisfy the gamma2.2 curve. The current display brightness and chromaticity of the entire display panel are consistent with the target Specifications are consistent.
  • the present application further provides a gamma correction device 10 for a display panel.
  • the gamma correction device 10 is electrically connected to the acquisition device 50 , and the electrical connection may refer to a wireless connection or a wired connection, which is not limited herein.
  • the acquisition device 50 may be a device electrically connected to the outside of the gamma correction device 10 (as shown in FIG. 3 a ), or may be integrated with the gamma correction device 10 and electrically connected to the gamma correction device 10 device (shown in Figure 3b).
  • the display panel includes a first display area and a second display area, and the pixel density of the first display area is smaller than that of the second display area.
  • the gamma correction device 10 includes: a first control module 11 , a first adjustment module 12 , a second control module 13 , an acquisition module 14 , a determination module 15 , a compensation module 16 and a second adjustment module 17 .
  • the first control module 11 is used to control the first display area to display the test image; the first adjustment module 12 is used to perform gamma correction on the first display area to obtain the first gamma correction data; the second control module 13 is used to A gamma correction data controls the display of the test image in the second display area; the acquisition module 14 is used to acquire the current display brightness corresponding to the test image displayed in the second display area collected by the acquisition device; the determination module 15 is used to determine the difference between the current display brightness and the first display When the display brightness corresponding to the preset pixel gray scale is the same in the second display area, the remapping parameter of the second display area is determined according to the corresponding gray scale brightness and the preset pixel gray scale when the second display area is displayed with the current display brightness; the compensation module 16 uses The second gamma correction data is obtained by compensating the first gamma correction data according to the remapping parameter; the second adjustment module 17 is used for controlling the second display area to display according to the second gamma correction data.
  • the first adjustment module 12 further includes a debugging unit 121 and a combining unit 122 .
  • the debugging unit 121 is configured to respectively debug a plurality of pixel grayscale binding points from the highest pixel grayscale to the lowest pixel grayscale in the first display area, and obtain a plurality of grayscale luminances corresponding to the plurality of pixel grayscale binding points respectively;
  • the combining unit 122 is configured to combine the gray-level luminances corresponding to the gray-level binding points of the plurality of pixels to obtain the first gamma correction data.
  • the first adjustment module 12 further includes a control unit 123 .
  • the control unit 123 is configured to control the first display area to display according to the first gamma correction data based on the luminance uneven compensation algorithm.
  • the determination module 15 includes a first determination unit 151 and a second determination unit 152 .
  • the first determination unit 151 is configured to determine the target pixel grayscale corresponding to the grayscale brightness of the current display brightness displayed in the second display area
  • the second determination unit 152 is configured to determine remapping according to the ratio of the target pixel grayscale to the preset pixel grayscale. parameter.
  • the gamma correction device 10 of the present application obtains the second gamma correction data by compensating the first gamma correction data according to the remapping parameters, so as to realize the gamma correction of different display areas in the display panel without adding equipment and new chips. Adjust the gamma characteristics of different regions to a consistent state.
  • the present application further provides an electronic device 100 .
  • the electronic device 100 includes a processor 31 and a memory 32, and the memory 32 stores a computer program 33.
  • the computer program When the computer program is executed by the processor 31, it realizes: controlling the first display area to display a test picture; performing gamma correction on the first display area to obtain the first display area.
  • a gamma correction data control the second display area to display a test image according to the first gamma correction data; obtain the current display brightness corresponding to the test image displayed in the second display area; display the preset pixel gray in the current display brightness and the first display area
  • the remapping parameter of the second display area is determined according to the corresponding gray-scale brightness and the preset pixel gray-scale when the second display area is displayed with the current display brightness; and according to the remapping parameter, the first gamma
  • the correction data is compensated to obtain second gamma correction data; the second display area is controlled to display according to the second gamma correction data.
  • the electronic device 100 is, for example, a computer, a mobile phone, an ipad, a tablet learning machine, a game console, and other smart devices having a display panel, which are not listed here.
  • the processor 31 is further configured to: debug the binding points of multiple pixel gray levels ranging from the highest pixel gray level to the lowest pixel gray level in the first display area, respectively, to obtain the same pixel gray level as the multiple pixel gray level. Multiple gray-scale intensities corresponding to the binding points respectively; and combining the gray-scale brightnesses corresponding to the multiple pixel gray-scale binding points respectively to obtain the first gamma correction data.
  • the processor 31 is configured to: control the first display area to display according to the first gamma correction data based on a luminance uneven compensation algorithm.
  • the present application further provides a non-volatile computer-readable storage medium 40 for a computer program, on which a computer program 41 is stored.
  • the computer-readable storage medium 40 may be provided in the processor 42 or the data source reader. At this time, the processor 42 or the data source reader can communicate with the cloud server to obtain the corresponding computer program 41 .
  • the computer program 41 includes computer program code.
  • the computer program code may be in source code form, object code form, an executable file or some intermediate form, or the like.
  • Computer-readable storage media may include: any entity or device capable of carrying computer program codes, recording media, U disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random storage Access memory (RAM, Random Access Memory), and software distribution media, etc.
  • the gamma correction method and device, electronic device and readable storage medium of the present application can achieve gamma correction of different pixel regions in a new type of display panel (AMOLED) without adding a gamma correction device or a new chip. , the gamma characteristics of different regions of the new display panel can be adjusted to a consistent state, the brightness and chromaticity both meet the target specifications, and the mass production performance is high.
  • the gamma characteristics of different regions of the new display panel can be adjusted to a consistent state, the brightness and chromaticity both meet the target specifications, and the mass production performance is high.
  • the gamma correction method and device, electronic device and readable storage medium of the present application obtain the second gamma correction data by compensating the first gamma correction data according to the remapping parameter, so as to realize the gamma correction of different display areas in the display panel , the gamma characteristics of different regions can be adjusted to a consistent state without adding equipment and new chips.

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Abstract

一种显示面板（20）的伽马校正方法。方法包括：控制第一显示区（21）显示测试画面（S11）；对第一显示区（21）进行伽马校正以得到第一伽马校正数据（S12）；根据第一伽马校正数据控制第二显示区（22）显示测试画面（S13）；获取第二显示区（22）显示测试画面对应的当前显示亮度（S14）；在当前显示亮度与第一显示区（21）显示预设像素灰阶对应的显示亮度相同时，根据第二显示区（22）以当前显示亮度显示时对应的灰阶亮度和预设像素灰阶确定第二显示区（22）的重映射参数（S15）；根据重映射参数对第一伽马校正数据进行补偿得到第二伽马校正数据（S16）；根据第二伽马校正数据控制第二显示区（22）进行显示（S17）。还包括一种伽马校正装置（10）、电子设备（100）和计算机可读存储介质（40）。

Description

伽马校正方法及装置、电子设备和可读存储介质 技术领域
本申请涉及显示技术领域，特别涉及一种伽马校正方法及装置、电子设备和可读存储介质。
背景技术
随着主动式有机电激发光二极管显示面板(Active Matrix/Organic Light Emitting Diode，AMOLED)模组多元化的发展，出现了同一个模组在屏幕显示区域有多种像素排布的架构，如目前流行的屏下摄像头，即将普通AMOLED模组在屏幕正常显示区域显示上方，通过面板设计，将屏幕正常显示区域上方的区域进行透明化处理，变为正常屏幕显示区域的一半像素点排布进行显示，并将手机的摄像头隐藏于此，在真正意义上实现了全面屏。
基于在同一个模组上存在了两种不同的像素排布设计，由于仅针对高密度像素区域(H区)进行伽马校正后，低密度像素区域(L区)由于像素密度问题在亮度及色度上均达不到高密度区域的效果。因此需要将同一个H+L新型显示模组在H区及L区均采用伽马校正设备进行调试，一方面两个不同区域的调试需要增加一台伽马校正设备，而设备的增加，将大大增加面板厂的生产成本；另一方面H区及L区同时显示需要显示模组具备高像素、低像素伽马寄存器设置与调节的芯片，新开芯片的难度大、时程周期长、验证通过时间长。
发明内容
本申请实施方式提供一种伽马校正方法及装置、电子设备和可读存储介质。
本申请实施方式提供一种显示面板的伽马校正方法。所述显示面板包括第一显示区和第二显示区，第一显示区的像素密度小于所述第二显示区的像素密度，所述伽马校正方法包括：控制所述第一显示区显示测试画面；对所述第一显示区进行伽马校正以得到第一伽马校正数据；根据所述第一伽马校正数据控制所述第二显示区显示所述测试画面；获取所述第二显示区显示所述测试画面对应的当前显示亮度；在所述当前显示亮度与所述第一显示区显示预设像素灰阶对应的显示亮度相同时，根据所述第二显示区以所述当前显示亮度显示时对应的灰阶亮度和所述预设像素灰阶确定所述第二显示区的重映射参数；根据所述重映射参数对所述第一伽马校正数据进行补偿得到第二伽马校正数据；根据所述第二伽马校正数据控制所述第二显示区进行显示。
在某些实施方式中，所述根据所述第二显示区以所述当前显示亮度显示时对应的灰阶亮度和所述预设像素灰阶确定所述第二显示区的重映射参数包括：确定所述第二显示区显示所述当前显示亮度的灰阶亮度对应的目标像素灰阶；根据所述目标像素灰阶和所述预设像素灰阶的比值确定所述重映射参数。
在某些实施方式中，所述确定所述第二显示区显示所述当前显示亮度的灰阶亮度对应的目标像 素灰阶通过下列条件式计算：
Figure PCTCN2020136234-appb-000001
式中，L vH-spec为所述第二显示区显示所述当前显示亮度的灰阶亮度，L vi为所述第一显示区显示预设像素灰阶对应的灰阶亮度，i为预设像素灰阶值，Gray H-spec为所述第二显示区显示所述当前显示亮度的灰阶亮度对应的目标像素灰阶，Gamma为伽马校正参数值。
在某些实施方式中，所述根据所述重映射参数对所述第一伽马校正数据进行补偿得到第二伽马校正数据包括：根据所述重映射参数对所述第一伽马校正数据的像素灰阶进行补偿处理以得到所述第二伽马校正数据。
在某些实施方式中，所述根据所述第二伽马校正数据控制所述第二显示区进行显示包括：基于亮度不均补偿算法根据所述第二伽马校正数据控制所述第二显示区进行显示。
在某些实施方式中，所述对所述第一显示区进行伽马校正以得到第一伽马校正数据包括：对所述第一显示区从最高像素灰阶到最低像素灰阶的多个像素灰阶绑点分别进行调试，得到与多个像素灰阶绑点分别对应的多个灰阶亮度；将多个像素灰阶绑点分别对应的灰阶亮度进行组合，以得到所述第一伽马校正数据。
在某些实施方式中，所述方法还包括：基于亮度不均补偿算法根据所述第一伽马校正数据控制所述第一显示区进行显示。
本申请实施方式提供一种显示面板的伽马校正装置。所述伽马校正装置与采集装置电性连接，所述显示面板包括第一显示区和第二显示区，第一显示区的像素密度小于所述第二显示区的像素密度，所述伽马校正装置包括：第一控制模块、第一调节模块、第二控制模块、获取模块、确定模块、补偿模块和第二调节模块。所述第一控制模块用于控制所述第一显示区显示测试画面；所述第一调节模块用于对所述第一显示区进行伽马校正以得到第一伽马校正数据；所述第二控制模块用于根据所述第一伽马校正数据控制所述第二显示区显示所述测试画面；所述获取模块用于获取所述采集装置采集的所述第二显示区显示所述测试画面对应的当前显示亮度；所述确定模块用于在所述当前显示亮度与所述第一显示区显示预设像素灰阶对应的显示亮度相同时，根据所述第二显示区以所述当前显示亮度显示时对应的灰阶亮度和所述预设像素灰阶确定所述第二显示区的重映射参数；所述补偿模块用于根据所述重映射参数对所述第一伽马校正数据进行补偿得到第二伽马校正数据；所述第二调节模块用于根据所述第二伽马校正数据控制所述第二显示区进行显示。
本申请实施方式还提供一种电子设备。所述电子设备包括处理器和存储器，所述存储器存储有计算机程序，所述计算机程序被所述处理器执行时实现上述任一实施方式所述的伽马校正方法。
本申请实施方式还提供一种计算机程序的非易失性计算机可读存储介质。当所述计算机程序被一个或多个处理器执行时，实现上述任一实施方式所述的伽马校正方法。
本申请的伽马校正方法及装置、电子设备和可读存储介质对第一伽马校正数据根据重映射参数进行补偿得到第二伽马校正数据，实现显示面板中不同显示区域的伽马校正，不增加设备和新芯片 即可将不同区域的伽马特性调至一致的状态。
本申请实施方式的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点可以从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本申请某些实施方式的电子设备的结构示意图；
图2是本申请某些实施方式的电子设备的结构示意图；
图3a是本申请某些实施方式的伽马校正方法的场景示意图；
图3b是本申请某些实施方式的伽马校正方法的场景示意图；
图4是本申请某些实施方式的第二显示区的像素点的结构示意图；
图5是本申请某些实施方式的第一显示区的像素点的结构示意图；
图6是本申请某些实施方式的伽马校正方法的流程示意图；
图7是本申请某些实施方式的伽马校正方法的流程示意图；
图8是本申请某些实施方式的伽马校正方法的流程示意图；
图9是本申请某些实施方式的伽马校正方法中输入灰阶与输出灰阶的的关系示意图；
图10是本申请某些实施方式的伽马校正方法中像素灰阶与显示区的亮度的关系示意图；
图11是本申请某些实施方式的伽马校正方法的场景示意图；
图12是本申请某些实施方式的伽马校正装置的结构示意图；
图13是本申请某些实施方式的伽马校正装置中第一调节模块的结构示意图；
图14是本申请某些实施方式的伽马校正装置中确定模块的结构示意图；
图15是本申请某些实施方式的电子设备的结构示意图；
图16是本申请某些实施方式的计算机可读存储介质的结构示意图。
具体实施方式
下面详细描述本申请的实施方式，所述实施方式的示例在附图中示出，其中，相同或类似的标号自始至终表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本申请的实施方式，而不能理解为对本申请的实施方式的限制。
请一并参阅图1至图5，图1和图2为目前新型显示面板(H区+L区的AMOLED模组)架构示意图，其中H表示在正常显示区域，H区的像素密度如图4所示排布，L表示在摄像头区域的显示区，L区的像素密度如图5所示排布，例如，高像素密度(High PPI)大约为398，低像素密度(Low PPI)大约为199。H+L表示一个模组显示区域中有2种高低像素密度结合的显示架构。
基于在同一个模组上存在了两种不同的像素排布设计，由于仅针对高密度像素区域(H区)进行伽马校正后，低密度像素区域(L区)由于像素密度问题在亮度及色度上均达不到高密度区域的效果。因此需要将同一个H+L新型显示模组在H区及L区均采用伽马校正设备进行调试，一方面两个不同区域的调试需要增加一台伽马校正设备，而设备的增加，将大大增加面板厂的生产成本；另一方面H区及L区同时显示需要显示模组具备高像素、低像素伽马寄存器设置与调节的芯片，新开芯片的难度大、时程周期长、验证通过时间长。
为此，本申请提供一种显示面板的伽马校正方法，通过对第一伽马校正数据根据重映射参数进行补偿得到第二伽马校正数据，实现显示面板中不同显示区域的伽马校正，不增加设备和新芯片即可将不同区域的伽马特性调至一致的状态。
可以理解地，请结合图1，显示面板20为电子设备100中的显示装置。显示面板20包括第一显示区21和第二显示区22，第一显示区21的像素密度小于第二显示区22的像素密度。电子设备100可以为手机、电脑、ipad等具有显示面板的智能设备。
请参阅图6，伽马校正方法包括以下步骤：
S11：控制第一显示区显示测试画面；
S12：对第一显示区进行伽马校正以得到第一伽马校正数据；
S13：根据第一伽马校正数据控制第二显示区显示测试画面；
S14：获取第二显示区显示测试画面对应的当前显示亮度；
S15：在当前显示亮度与第一显示区显示预设像素灰阶对应的显示亮度相同时，根据第二显示区以当前显示亮度显示时对应的灰阶亮度和预设像素灰阶确定第二显示区的重映射参数；和
S16：根据重映射参数对第一伽马校正数据进行补偿得到第二伽马校正数据；
S17：根据第二伽马校正数据控制第二显示区进行显示。
第一显示区21指的是低密度像素区域(L区)，可以设置在显示面板20的上方的中间区域(如图1所示)，也可以设置在显示面板20的四个边角区域(如图2所示)。第二显示区22指的是高密度像素区域(H区)，为显示面板20中除了第一显示区21以外的其他区域。其中，第一伽马校正数据指的是对L区伽马校正得到的输入电压与亮度的对应转换关系的数据。
控制第一显示区L区显示测试画面，测试画面可以是白画面、红画面、黄画面等颜色一致的像素画面，本申请实施例以测试画面为白画面为例进行说明。
对第一显示区L区进行伽马校正以得到伽马校正数据，即，调节L区的输入电压以使得L区的亮度处于不同的像素灰阶的过程，对L区进行伽马校正结束后，L区的亮度、色度满足目标规格。具体地，请参阅图3a或图3b，采集装置50(小探头伽马设备)与伽马校正装置10电性连接，电性连接可以指的是无线连接或有线连接，在此不作限制。采集装置50可以是在伽马校正装置10外部连接的设备(如图3a所示)，也可以是伽马校正装置10集成为一体的设备(如图3b所示)。因此，在执行伽马校正工序时，首先，利用采集装置50(例如小探头伽马设备)对L区的中心区域 进行探测以采集L区不同输入电压对应的亮度数据，然后，本申请的伽马校正方法通过获取小探头伽马设备采集的亮度数据和对应L区的输入电压得到第一伽马校正数据从而实现对第一显示区L的伽马校正。伽马校正指的是伽马校正过程得到的第一伽马校正数据指的是屏幕中L区的输入电压与亮度的对应转换关系数据。经过对L区伽马校正之后，H区沿用L区的相同的第一伽马校正数据控制H区显示，且该第一伽马校正数据存储烧录在IC芯片中。
根据第一伽马校正数据控制第二显示区显示测试画面，即，使用第一伽马校正数据中预设像素灰阶对应的输入电压值驱动第二显示区显示测试画面，然后还是使用上述小探头伽马设备采集显示亮度。
在获取第二显示区显示测试画面对应的当前显示亮度时，第二显示区使用的是和第一显示区相同的第一伽马校正数据，可以根据第一伽马校正数据确定第二显示区应用第一显示区对应伽马校正参数对应的重映射参数，使得第二显示区可以利用重映射参数对伽马校正数据进行补偿得到第二伽马校正数据，从而控制第二显示区在相同像素灰阶的情况下达到和第一显示区相同的亮度、色度效果。
具体地，根据第一伽马校正数据控制第二显示区显示测试画面，即可以调节显示面板的输入电压控制第二显示区显示为预设像素灰阶对应的目标测试画面，例如，预设像素灰阶为第1灰阶、第2灰阶、第5灰阶、第10灰阶、第20灰阶、第25灰阶、第30灰阶、第40灰阶、第50灰阶、第100灰阶等灰阶绑点，目标测试画面即为与第一显示区的预设像素灰阶对应第二显示区的显示画面。再根据目标测试画面获取第二显示区的目标测试画面对应的当前显示亮度。其中，当前显示亮度的数据指的是与调节H区至与L区的当前显示亮度一致的亮度时对应的输入电压值U。
本申请的伽马校正方法通过对第一伽马校正数据根据重映射参数进行补偿得到第二伽马校正数据，实现显示面板中不同显示区域的伽马校正，不增加设备和新芯片即可将不同区域的伽马特性调至一致的状态。
请参阅图7，在某些实施例中，步骤S12包括：
S121：对第一显示区从最高像素灰阶到最低像素灰阶的多个像素灰阶绑点分别进行调试，得到与多个像素灰阶绑点分别对应的多个灰阶亮度；
S122：将多个像素灰阶绑点分别对应的灰阶亮度进行组合，以得到第一伽马校正数据。
具体地，第一显示区L区从最高像素灰阶到最低像素灰阶的多个像素灰阶绑点分别进行调试，即，例如最高像素灰阶为第255灰阶，最低像素灰阶为第0灰阶，则总共有255个灰阶，多个像素灰阶绑点即可以为255个灰阶中任意取多个灰阶，例如取5个灰阶，分别为第50灰阶、第100灰阶、第150灰阶、第200灰阶和第250灰阶。分别第一显示区的白画面显示的像素灰阶为第50灰阶、第100灰阶、第150灰阶、第200灰阶和第250灰阶时，对应调试驱动第一显示区显示的驱动电压值，得到对应的5个驱动电压值即为灰阶亮度。将5个像素灰阶与对应的5个灰阶亮度进行组合得到第一伽马校正数据，即最终的第一伽马校正数据包括像素灰阶值与相对应的灰阶亮度。
在某些实施例中，伽马校正方法还包括：基于亮度不均补偿算法根据所述第一伽马校正数据控制所述第一显示区进行显示。
具体地，亮度不均补偿算法(Demura)的原理是将画面中偏暗的区域变亮，或者偏亮的区域变暗，或者将有色偏的区域消除。输入灰阶指的是用户输入至第一显示区的图像的原始像素灰阶，即为对显示区域伽马校正前的图像的像素灰阶。根据亮度不均补偿算法(Demura)的方式对输入灰阶进行处理即利用亮度不均补偿算法的方式对原始像素灰阶进行处理得到第一显示区中的伽马校正后的像素灰阶。
其中，亮度不均补偿算法(demura)的计算公式为：
Gray -out＝Gray -in*Gain+Offset
上述式子中，Gray -out表示输出灰阶(或称为像素灰阶)，Gray -in表示输入灰阶，Gain表示增益值，Offset表示补偿值。
请参阅图8，在某些实施例中，步骤S15包括：
S151：确定第二显示区显示当前显示亮度的灰阶亮度对应的目标像素灰阶；
S152：根据目标像素灰阶和预设像素灰阶的比值确定重映射参数。
可以理解地，因为L区和H区的子像素排布方式均是GGRB(如图4和图5所示)，各个子像素对于白画面亮度贡献不存在H/L区差异，只是L区的像素密度较少，因此此时的H区与L区的白色画面坐标一致，但亮度偏大，需要对H区的数据再调整。即需要利用上述伽马设备采集当前H区的亮度数据，利用伽马校正数据计算方式，确定H区当前显示亮度的灰阶亮度对应的目标像素灰阶。
首先，本申请的伽马校正方法可以根据以下式子确定H区的当前显示亮度对应的目标像素灰阶：
Figure PCTCN2020136234-appb-000002
式中，L vH-spec为所述第二显示区(H区)显示当前显示亮度的灰阶亮度，L vi为所述第一显示区(L区)显示预设像素灰阶对应的灰阶亮度，i为预设像素灰阶值，Gray H-spec为H区所述显示当前显示亮度的灰阶亮度对应的目标像素灰阶，Gamma为伽马校正参数值，即伽马校正指数，该伽马校正参数值可以为1.8、2.0、2.2、2.4及2.6，不同的伽马校正参数值代表亮度调节的数值不同。由于目前Gamma2.2一直是Windows和Apple的标准，使用Gamma2.2的显示器可以产生几乎最佳的颜色，此级别为真彩色提供了最佳平衡，并被用作图形和视频专业人员的标准，因此，本申请以伽马校正参数值Gamma为2.2为例进行说明。
具体地，以H区当前的亮度值处于预设像素灰阶为255为例进行说明，根据以下公式先确定H区当前显示亮度规格所在的灰阶：
Figure PCTCN2020136234-appb-000003
式中，L vH-spec为所述第二显示区(H区)显示当前显示亮度的灰阶亮度，L v255为所述第一显 示区(L区)显示预设像素灰阶为255时对应的灰阶亮度，Gray H-spec为H区所述显示当前显示亮度的灰阶亮度对应的目标像素灰阶，Gamma为伽马校正参数值，即伽马校正指数，该伽马校正参数值可以为1.8、2.0、2.2、2.4及2.6，不同的伽马校正参数值代表亮度调节的数值不同。由于目前Gamma 2.2一直是Windows和Apple的标准，使用Gamma 2.2的显示器可以产生几乎最佳的颜色，此级别为真彩色提供了最佳平衡，并被用作图形和视频专业人员的标准，因此，本申请以伽马校正参数值Gamma为2.2为例进行说明。
然后，根据以下条件式可以计算出重映射参数Remap的数值：
Remap＝Gray H-spec/255
假设此时H区239灰阶为当前显示亮度数据，则重映射参数Remap＝239/255，在demura的后处理流程中，限定H区位置内的增益值(Gain)为remap*Gain，此时H区的伽马校正后的输出的显示灰阶Gray-out可以表示为下面的公式：
Gray -out＝Gray -in*Remap*Gain+Offset
另外，L区的伽马校正后的输出的显示灰阶Gray-out可以表示为下面的公式：
Gray -out＝Gray -in*Gain+Offset
上述式子中，Gray -out表示输出灰阶，Gray -in表示输入灰阶，Gain表示增益值，Offset表示补偿值。
可以理解地，亮度不均补偿算法(demura)即把它认为偏暗的区域变亮，或者偏亮的区域变暗，或者将有色偏的区域消除，最终的目标是使得显示面板中的不同区域有大体相同的颜色，需要平滑的demura算法来消除Mura边界。
接着，根据当前显示亮度和预设像素灰阶确定第二显示区(H区)的重映射参数(remap)，重映射参数(remap)可以为当前显示亮度值对应的灰阶值与当前亮度值对应的灰阶值的比值。例如，基于输入电压值为U时，第一显示区L区的亮度值为满足目标规格的亮度值L1，由于H区的像素密度较大，第二显示区H区的当前显示亮度值会比亮度值L1大一些，假设为亮度值为L2，例如亮度值L2对应的灰阶数为第255阶，则此时将亮度值L1作为第二显示区H区的当前显示亮度值，根据伽马特性曲线得到对应的灰阶值为第239灰阶，则得到重映射参数remap＝239/255。
然后，根据重映射参数对第一伽马校正数据的像素灰阶进行补偿处理以得到第二伽马校正数据。可以理解地，如图9所示，在L区的输入灰阶为第255灰阶时，L区的输出灰阶即为第255灰阶，然而在H区的输入灰阶(像素灰阶)为255时，由于H区的像素密度比L区的密度大，因此根据重映射参数对第一伽马校正数据的像素灰阶进行补偿处理，即H区的像素灰阶为255乘以remap，由于remap＝239/255，此时得到此时H区的输出灰阶数为第239灰阶，其中，第239灰阶及第239灰阶对应的输入电压即为第二伽马校正数据的其中一组数据。以此类推，其余的H区像素点的输入灰阶都乘以重映射参数remap，以获得第二显示区(H区)的第二伽马校正数据。然后基于亮度不均补偿算法根据第二伽马校正数据控制第二显示区进行显示。
经过重映射参数及亮度不均补偿算法补偿后的L区和H区均能满足gamma2.2曲线(如图10所示)，当前显示亮度色度与目标规格要求一致，如图11所示为利用该原理matlab仿真的白画面结果。其中，gamma2.2曲线是用户预先设置的伽马校正目标规格曲线，也可以是gamma2.4曲线或其他gamma曲线，在此不做限制。
本申请根据当前显示亮度数据确定第二显示区的重映射参数remap，根据重映射参数remap对L区伽马校正后得到的第一伽马校正数据进行补偿以得到第二伽马校正数据，然后基于亮度不均补偿算法根据第二伽马校正数据控制第二显示区进行显示，最后，显示面板的L区和H区均能满足gamma2.2曲线，整个显示面板的当前显示亮度色度与目标规格要求一致。
为了实现上述实施例，请参阅图12，本申请还提供一种显示面板的伽马校正装置10。请参阅图3a或图3b，伽马校正装置10与采集装置50电性连接，电性连接可以指的是无线连接或有线连接，在此不作限制。其中，采集装置50可以是与伽马校正装置10外部电性连接的装置(如图3a所示)，也可以是与伽马校正装置10集成为一体且与伽马校正装置10电性连接的装置(如图3b所示)。显示面板包括第一显示区和第二显示区，第一显示区的像素密度小于第二显示区的像素密度。伽马校正装置10包括：第一控制模块11、第一调节模块12、第二控制模块13、获取模块14、确定模块15、补偿模块16和第二调节模块17。第一控制模块11用于控制第一显示区显示测试画面；第一调节模块12用于对第一显示区进行伽马校正以得到第一伽马校正数据；第二控制模块13用于根据第一伽马校正数据控制第二显示区显示测试画面；获取模块14用于获取采集装置采集的第二显示区显示测试画面对应的当前显示亮度；确定模块15用于在当前显示亮度与第一显示区显示预设像素灰阶对应的显示亮度相同时，根据第二显示区以当前显示亮度显示时对应的灰阶亮度和预设像素灰阶确定第二显示区的重映射参数；补偿模块16用于根据重映射参数对第一伽马校正数据进行补偿得到第二伽马校正数据；第二调节模块17用于根据第二伽马校正数据控制第二显示区进行显示。
在本申请的一个实施例中，请结合图13，第一调节模块12还包括调试单元121和组合单元122。调试单元121用于对第一显示区从最高像素灰阶到最低像素灰阶的多个像素灰阶绑点分别进行调试，得到与多个像素灰阶绑点分别对应的多个灰阶亮度；组合单元122用于将多个像素灰阶绑点分别对应的灰阶亮度进行组合，以得到第一伽马校正数据。
在本申请的一个实施例中，请结合图13，第一调节模块12还包括控制单元123。控制单元123用于基于亮度不均补偿算法根据第一伽马校正数据控制第一显示区进行显示。
在本申请的一个实施例中，请结合图14，确定模块15包括第一确定单元151和第二确定单元152。第一确定单元151用于确定第二显示区显示当前显示亮度的灰阶亮度对应的目标像素灰阶，第二确定单元152用于根据目标像素灰阶和预设像素灰阶的比值确定重映射参数。
本申请的伽马校正装置10通过对第一伽马校正数据根据重映射参数进行补偿得到第二伽马校正数据，实现显示面板中不同显示区域的伽马校正，不增加设备和新芯片即可将不同区域的伽马特 性调至一致的状态。
请参阅图15，本申请还提供一种电子设备100。电子设备100包括处理器31和存储器32，存储器32存储有计算机程序33，计算机程序被处理器31执行时实现：控制第一显示区显示测试画面；对第一显示区进行伽马校正以得到第一伽马校正数据；根据第一伽马校正数据控制第二显示区显示测试画面；获取第二显示区显示测试画面对应的当前显示亮度；在当前显示亮度与第一显示区显示预设像素灰阶对应的显示亮度相同时，根据第二显示区以当前显示亮度显示时对应的灰阶亮度和预设像素灰阶确定第二显示区的重映射参数；和根据重映射参数对第一伽马校正数据进行补偿得到第二伽马校正数据；根据第二伽马校正数据控制所述第二显示区进行显示。电子设备100例如为电脑、手机、ipad、平板学习机和游戏机等具有显示面板的智能设备，在此不一一列举。
在本申请的一个实施例中，处理器31还用于：对第一显示区从最高像素灰阶到最低像素灰阶的多个像素灰阶绑点分别进行调试，得到与多个像素灰阶绑点分别对应的多个灰阶亮度；将多个像素灰阶绑点分别对应的灰阶亮度组合，以得到第一伽马校正数据。
在本申请的一个实施例中，处理器31用于：基于亮度不均补偿算法根据第一伽马校正数据控制第一显示区进行显示。
在本申请的一个实施例中，请参阅图16，本申请还提供一种计算机程序的非易失性计算机可读存储介质40，其上存储有计算机程序41。
计算机程序41被一个或多个处理器42执行的情况下，实现上述任意一种实施方式的模型训练方法的步骤。
例如，程序被处理器42执行的情况下，实现以下伽马校正方法的步骤：
S11：控制第一显示区显示测试画面；
S12：对第一显示区进行伽马校正以得到第一伽马校正数据；
S13：根据第一伽马校正数据控制第二显示区显示测试画面；
S14：获取第二显示区显示测试画面对应的当前显示亮度；
S15：在当前显示亮度与第一显示区显示预设像素灰阶对应的显示亮度相同时，根据第二显示区以当前显示亮度显示时对应的灰阶亮度和预设像素灰阶确定第二显示区的重映射参数；
S16：根据重映射参数对第一伽马校正数据进行补偿得到第二伽马校正数据；
S17：根据第二伽马校正数据控制第二显示区进行显示。
计算机可读存储介质40可设置在处理器42或者数据源读取器内，此时，处理器42或者数据源读取器能够与云端服务器进行通讯来获取到相应的计算机程序41。
可以理解，计算机程序41包括计算机程序代码。计算机程序代码可以为源代码形式、对象代码形式、可执行文件或某些中间形式等。计算机可读存储介质可以包括：能够携带计算机程序代码的任何实体或装置、记录介质、U盘、移动硬盘、磁碟、光盘、计算机存储器、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、以及软件分发介质等。
本申请的伽马校正方法及装置、电子设备和可读存储介质通过，实现新型的显示面板(AMOLED)中不同像素区域的伽马校正，在不增加伽马校正设备与增加新芯片的情况下，能够将新型显示面板的不同区域伽马特性调整为一致的状态，亮度及色度均满足目标规格，量产性能高。
本申请的伽马校正方法及装置、电子设备和可读存储介质通过对第一伽马校正数据根据重映射参数进行补偿得到第二伽马校正数据，实现显示面板中不同显示区域的伽马校正，不增加设备和新芯片即可将不同区域的伽马特性调至一致的状态。

Claims (10)

  1. 一种显示面板的伽马校正方法，其特征在于，所述显示面板包括第一显示区和第二显示区，第一显示区的像素密度小于所述第二显示区的像素密度，所述伽马校正方法包括：
    控制所述第一显示区显示测试画面；
    对所述第一显示区进行伽马校正以得到第一伽马校正数据；
    根据所述第一伽马校正数据控制所述第二显示区显示所述测试画面；
    获取所述第二显示区显示所述测试画面对应的当前显示亮度；
    在所述当前显示亮度与所述第一显示区显示预设像素灰阶对应的显示亮度相同时，根据所述第二显示区以所述当前显示亮度显示时对应的灰阶亮度和所述预设像素灰阶确定所述第二显示区的重映射参数；
    根据所述重映射参数对所述第一伽马校正数据进行补偿得到第二伽马校正数据；
    根据所述第二伽马校正数据控制所述第二显示区进行显示。
  2. 根据权利要求1所述的伽马校正方法，其特征在于，所述根据所述第二显示区以所述当前显示亮度显示时对应的灰阶亮度和所述预设像素灰阶确定所述第二显示区的重映射参数包括：
    确定所述第二显示区显示所述当前显示亮度的灰阶亮度对应的目标像素灰阶；
    根据所述目标像素灰阶和所述预设像素灰阶的比值确定所述重映射参数。
  3. 根据权利要求2所述的伽马校正方法，其特征在于，所述确定所述第二显示区显示所述当前显示亮度的灰阶亮度对应的目标像素灰阶通过下列条件式计算：
    Figure PCTCN2020136234-appb-100001
    式中，L vH-spec为所述第二显示区显示所述当前显示亮度的灰阶亮度，L vi为所述第一显示区显示预设像素灰阶对应的灰阶亮度，i为预设像素灰阶值，Gray H-spec为所述第二显示区显示所述当前显示亮度的灰阶亮度对应的目标像素灰阶，Gamma为伽马校正参数值。
  4. 根据权利要求1所述的伽马校正方法，其特征在于，根据所述重映射参数对所述第一伽马校正数据进行补偿得到第二伽马校正数据包括：
    根据所述重映射参数对所述第一伽马校正数据的像素灰阶进行补偿处理以得到所述第二伽马校正数据。
  5. 根据权利要求1所述的伽马校正方法，其特征在于，所述根据所述第二伽马校正数据控制所述第二显示区进行显示包括：
    基于亮度不均补偿算法根据所述第二伽马校正数据控制所述第二显示区进行显示。
  6. 根据权利要求1所述的伽马校正方法，其特征在于，所述对所述第一显示区进行伽马校正以得到第一伽马校正数据包括：
    对所述第一显示区从最高像素灰阶到最低像素灰阶的多个像素灰阶绑点分别进行调试，得到与多个像素灰阶绑点分别对应的多个灰阶亮度；
    将多个像素灰阶绑点分别对应的灰阶亮度进行组合，以得到所述第一伽马校正数据。
  7. 根据权利要求6所述的伽马校正方法，其特征在于，所述方法还包括：
    基于亮度不均补偿算法根据所述第一伽马校正数据控制所述第一显示区进行显示。
  8. 一种显示面板的伽马校正装置，其特征在于，所述伽马校正装置与采集装置电性连接，所述显示面板包括第一显示区和第二显示区，第一显示区的像素密度小于所述第二显示区的像素密度，所述伽马校正装置包括：
    第一控制模块，所述第一控制模块用于控制所述第一显示区显示测试画面；
    第一调节模块，所述第一调节模块用于对所述第一显示区进行伽马校正以得到第一伽马校正数据；
    第二控制模块，所述第二控制模块用于根据所述第一伽马校正数据控制所述第二显示区显示所述测试画面；
    获取模块，所述获取模块用于获取所述采集装置采集的所述第二显示区显示所述测试画面对应的当前显示亮度；
    确定模块，所述确定模块用于在所述当前显示亮度与所述第一显示区显示预设像素灰阶对应的显示亮度相同时，根据所述第二显示区以所述当前显示亮度显示时对应的灰阶亮度和所述预设像素灰阶确定所述第二显示区的重映射参数；
    补偿模块，所述补偿模块用于根据所述重映射参数对所述第一伽马校正数据进行补偿得到第二伽马校正数据；
    第二调节模块，所述第二调节模块用于根据所述第二伽马校正数据控制所述第二显示区进行显示。
  9. 一种电子设备，其特征在于，包括处理器和存储器，所述存储器存储有计算机程序，所述计算机程序被所述处理器执行时实现1-7任一项所述的伽马校正方法。
  10. 一种计算机程序的非易失性计算机可读存储介质，其特征在于，当所述计算机程序被一个或多个处理器执行时，实现权利要求1-7中任一项所述的伽马校正方法。
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