WO2020143365A1 - 显示电压补偿方法及装置、显示装置和显示设备 - Google Patents

显示电压补偿方法及装置、显示装置和显示设备 Download PDF

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Publication number
WO2020143365A1
WO2020143365A1 PCT/CN2019/122684 CN2019122684W WO2020143365A1 WO 2020143365 A1 WO2020143365 A1 WO 2020143365A1 CN 2019122684 W CN2019122684 W CN 2019122684W WO 2020143365 A1 WO2020143365 A1 WO 2020143365A1
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Prior art keywords
grayscale value
value
gray scale
display
compensation
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PCT/CN2019/122684
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English (en)
French (fr)
Inventor
熊玉龙
周留刚
李涛
韩屹湛
孙建伟
何浏
梁云云
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京东方科技集团股份有限公司
合肥京东方显示技术有限公司
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Priority to US16/761,593 priority Critical patent/US11348547B2/en
Publication of WO2020143365A1 publication Critical patent/WO2020143365A1/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
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3614—Control of polarity reversal in general
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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
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    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects
    • G—PHYSICS
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    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
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    • 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
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G—PHYSICS
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    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
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    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
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    • G09G2320/00—Control of display operating conditions
    • G09G2320/10—Special adaptations of display systems for operation with variable images
    • G09G2320/103—Detection of image changes, e.g. determination of an index representative of the image change
    • G—PHYSICS
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    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
    • G—PHYSICS
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    • 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
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display 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
    • 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 disclosure relates to the field of display technology, and in particular, to a display voltage compensation method, a display voltage compensation device, a display device, and a display device.
  • a bias voltage will be generated on the pixels, which is likely to cause afterimage.
  • the polarity inversion (Polarity Inversion, POL) signal of the pixel is usually reversed once at a preset time interval, so that the bias voltage on the pixel point cancels.
  • the liquid crystal will deflect in the same direction, making the deflection angle of the liquid crystal in the next frame too large, causing the liquid crystal to overdrive, resulting in the difference in brightness of the front and back frames, and causing the screen to flicker .
  • the present disclosure provides a display voltage compensation method and device, display device, and display device.
  • a display voltage compensation method including: when performing a reversal operation on a polarity reversal signal of any pixel, acquiring the previous gray level of any pixel Value and the value in the back gray scale.
  • the polarity inversion signal is used to control the polarity of the pixel voltage of any pixel
  • the gray scale value in the front is the gray scale value of any pixel in the previous frame in the reverse operation
  • the gray scale value in the rear Invert the grayscale value of any pixel in the subsequent frame.
  • the compensated grayscale value is obtained from the inversion compensation table based on the above-mentioned previous grayscale value and the following grayscale value.
  • the inversion compensation table includes the above-mentioned mapping relationship between the previous gray scale value, the rear gray scale value and the compensated gray scale value.
  • the pixel voltage of any pixel is compensated according to the above-mentioned compensation gray scale value.
  • the above display voltage compensation method further includes: establishing an inversion compensation table.
  • the foregoing establishment of the inversion compensation table includes: establishing a first inversion compensation table.
  • the establishment of the first inversion compensation table includes: detecting the standard brightness for the previous gray scale value, and detecting the display brightness for the rear gray scale value. Then, compare the above display brightness with the standard brightness. When the above display brightness is greater than the standard brightness, the subsequent gray scale value is lowered to obtain a compensated gray scale value, and the display brightness targeted for the compensated gray scale value is less than or equal to the standard brightness.
  • a first inversion compensation table is established according to the preceding grayscale value, the following grayscale value and the compensated grayscale value.
  • the above-mentioned detection of the standard brightness for the previous grayscale value includes: displaying any pixel according to the previous grayscale value.
  • the display brightness of any pixel is detected as the standard brightness for the previous grayscale value.
  • the above-mentioned detection of the display brightness for the rear grayscale value includes: performing a test inversion operation on the polarity inversion signal. Then, according to the subsequent grayscale value, any pixel in the subsequent frame of the test inversion operation is displayed. Next, the display brightness of any pixel in the subsequent frame of the test inversion operation is detected as the display brightness targeted at the rear grayscale value.
  • reducing the subsequent grayscale value to obtain a compensated grayscale value includes: when the display brightness is greater than the standard brightness, performing a cyclic decrement process until the reduced subsequent grayscale value The target display brightness is less than or equal to the standard brightness.
  • the reduced subsequent grayscale value is used as the compensation grayscale value.
  • the above-mentioned cyclic decrement process includes: lowering the after-gray scale value by a specified threshold, and detecting the display brightness for the reduced after-gray scale value. Then compare the reduced display brightness and standard brightness for the lower gray level value.
  • the foregoing establishment of the inversion compensation table includes: establishing a second inversion compensation table.
  • Establishing the second inversion compensation table includes: on the one hand, acquiring the first preceding grayscale value and the first following grayscale value, the first preceding grayscale value and the first following grayscale value are the same.
  • the first standard brightness for the first preceding grayscale value and the first display brightness for the first subsequent grayscale value are detected respectively. Then compare the first display brightness with the first standard brightness. When the first display brightness is greater than the first standard brightness, the first subsequent grayscale value is reduced to obtain a first compensated grayscale value, and the display brightness for the first compensated grayscale value is less than or equal to the first standard brightness.
  • the second preceding grayscale value and the second following grayscale value are obtained, and the second preceding grayscale value and the second subsequent grayscale value are the same.
  • the second standard brightness for the second preceding grayscale value and the second display brightness for the second preceding grayscale value are respectively detected. Then compare the second display brightness with the second standard brightness. When the second display brightness is greater than the second standard brightness, the second subsequent grayscale value is reduced to obtain a second compensated grayscale value, and the display brightness for the second compensated grayscale value is less than or equal to the second standard brightness.
  • the first compensated grayscale value, the second following grayscale value and the second compensated grayscale value calculate the values for the first preceding grayscale value and the second preceding grayscale value The third compensation gray scale value.
  • a second inversion compensation table is established based on the first preceding grayscale value, the second following grayscale value, and the third compensation grayscale.
  • calculating the third compensated gray scale value according to the first preceding gray scale value, the first compensated gray scale value, the second after gray scale value, and the second compensated gray scale value includes: according to the first preceding gray scale Value, the first compensation gray scale, and the second compensation gray scale, the third compensation gray scale value is calculated by a linear difference.
  • the above method further includes: receiving a polarity control signal and responding to the polarity control signal to enter the polarity Reverse compensation mode.
  • a display voltage compensation device including: a polarity inversion module for performing an inversion operation on a polarity inversion signal of any pixel.
  • the compensation grayscale acquisition module is used to acquire the previous grayscale value and the subsequent grayscale value of any pixel.
  • the polarity inversion signal is used to control the polarity of the pixel voltage of any pixel, and the gray scale value in the front is the gray scale value of any pixel in the previous frame in the reverse operation, and the gray scale value in the rear is reversed The grayscale value of any pixel in the subsequent frame.
  • the compensation module is connected to the compensation grayscale acquisition module, and is used for compensating the pixel voltage of any pixel according to the compensation grayscale value when displaying the subsequent frame of the inversion operation.
  • the display voltage compensation device further includes: a storage module, connected to the compensation gray-scale acquisition module, and used for storing an inversion compensation table.
  • the display voltage compensation device further includes a control module for receiving a polarity control signal and responding to the polarity control signal to control the compensation gray-scale acquisition module to obtain the compensation gray-scale value.
  • a display device including the above-mentioned display voltage compensation device.
  • a display device including a memory and at least one processor.
  • the memory is configured to store instructions.
  • At least one processor executes instructions stored in the memory to implement the above display voltage compensation method.
  • the display voltage compensation method provided by the present disclosure obtains the compensated grayscale value from the inversion compensation table according to the previous grayscale value and the subsequent grayscale value, and compensates the pixel voltage by the compensated grayscale value, which solves the problem caused by liquid crystal overdriving There is a difference in the brightness of the screen before and after the reverse operation under the static screen, which causes the problem of the screen flickering briefly and improves the display quality.
  • Figure 1 is a schematic diagram of display brightness before and after a reversal operation
  • FIG. 2 is a flowchart of a method for displaying voltage compensation provided by an embodiment of the present disclosure
  • FIG. 3 is a flowchart of another display voltage compensation method provided by an embodiment of the present disclosure.
  • FIG. 4 is a flowchart of another voltage compensation method according to an embodiment of the present disclosure.
  • FIG. 5 is a flowchart of a method for determining a compensated gray scale value provided by an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of display brightness before and after an inversion operation provided by an embodiment of the present disclosure
  • FIG. 7 is a block diagram of a display voltage compensation device provided by an embodiment of the present disclosure.
  • FIG. 8 is a block diagram of another display voltage compensation device provided by an embodiment of the present disclosure.
  • FIG. 9 is a block diagram of yet another display voltage compensation device provided by an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of a timing controller provided by an embodiment of the present disclosure.
  • FIG. 11 is a block diagram of a display device provided by an embodiment of the present disclosure.
  • FIG. 12 is a block diagram of a display device provided by an embodiment of the present disclosure.
  • the inversion operation is usually performed on the POL signal every 28 seconds, so that the bias voltage before and after the inversion operation cancels each other, and the equivalent DC voltage on the liquid crystal is zero, thereby improving the afterimage.
  • This method can be called " 28 seconds polarity reversal". As shown in Figure 1, the inversion operation is performed at 28 seconds.
  • the pixel voltages of the two frames before and after the inversion operation are the same, and the liquid crystal deflects in the same direction. There is a brightness gain of ⁇ L in the frame, and the brightness is greater. There is a difference in the brightness of the front and back frames under the static picture, which causes the picture to flicker once briefly, which affects the image quality.
  • a processing method consists in normal charging in the previous frame for the inversion operation, and reducing the charging time in the subsequent frame for the inversion operation to reduce the deflection angle of the liquid crystal in the subsequent frame, and neutralizing in the rear Overdrive effect of the liquid crystal in the frame.
  • the shortcomings of this method are twofold: First, the partial voltage is turned on by line, which is easy to cause insufficient charging in the next frame, too much brightness drop, and the overall brightness is lower than the previous frame, which causes flicker.
  • the far-end circuit is heavily loaded, which is likely to cause insufficient charging at the far-end.
  • the near-end charging is better.
  • the difference between the brightness of the far-end and the near-end is large.
  • the brightness of the far-end in the latter frame is the same as that in the previous frame. The position decreases much, and the brightness at the near end of the subsequent frame decreases less than the same position at the previous frame, causing local flicker at the far end.
  • Exemplary embodiments of the present disclosure first provide a display voltage compensation method. It should be noted that the sequence numbers of the various steps in the following method are only used as a representation of the step for description, and should not be regarded as representing the execution order of the respective steps. Unless explicitly stated, the method need not be performed in the exact order shown. As shown in FIG. 2, the display voltage compensation method may include the following steps.
  • Step S210 When performing the inversion operation on the polarity inversion signal of any pixel, obtain the previous grayscale value and the subsequent grayscale value of any pixel.
  • Step S220 Obtain the compensation grayscale value from the inversion compensation table according to the previous grayscale value and the subsequent grayscale value.
  • the inversion compensation table is included between the previous grayscale value, the post grayscale value and the compensation grayscale value. Mapping relationship.
  • step S230 when the subsequent frame of the inversion operation is displayed, the pixel voltage of any pixel is compensated according to the compensated gray scale value.
  • the polarity inversion signal is used to control the polarity of the pixel voltage of any pixel.
  • the value in the front gray scale is the gray scale value displayed by any pixel in the previous frame in the reverse operation
  • the value in the rear gray scale is the gray scale value of the any pixel in the rear frame in the reverse operation, that is The theoretical grayscale value to be displayed by any pixel in the subsequent frame of the inversion operation
  • the compensated grayscale value is the actual display grayscale value that makes the brightness of the screen displayed before and after the inversion operation stable during actual display without flickering.
  • the display compensation method provided by the embodiment of the present disclosure obtains the compensated gray scale value from the inversion compensation table according to the previous gray scale value and the subsequent gray scale value, and compensates the pixel voltage of any pixel by compensating the gray scale value, which solves
  • the pixel voltages of the two frames before and after the polarity inversion are the same, the brightness of the screen before and after the inversion operation in the static picture caused by the liquid crystal overdrive is different, causing the problem of the screen flickering briefly.
  • the local flashing problem at the far end caused by insufficient charging at the far end of the large-size panel and good near-end charging in the processing method described above will not occur, which improves the display quality.
  • the above display voltage compensation method may further include step S240.
  • step S240 an inversion compensation table is established.
  • the establishment of the inversion compensation table is the mapping relationship established between the front gray-scale value, the rear gray-scale value and the compensation gray-scale value.
  • the mapping relationship between the previous gray scale value, the rear gray scale value and the compensated gray scale value can be obtained through experiments.
  • the test reversal operation was performed on the polarity reversal signal
  • the light sensor was used to detect the brightness of the screen before and after the test reversal operation
  • the brightness signal was converted into an electrical signal input filter
  • the test reversal operation was observed through the filter.
  • establishing the inversion compensation table may include: establishing a first inversion compensation table.
  • the above establishment of the first inversion compensation table may include: detecting the standard brightness targeted by the previous grayscale value, and detecting the display brightness targeted by the subsequent grayscale value. Then, compare the above display brightness with the standard brightness. When the display brightness for the subsequent grayscale value is greater than the standard brightness, the subsequent grayscale value is reduced to obtain the compensated grayscale value. Among them, the display brightness for the compensated gray scale value is less than or equal to the standard brightness. Then, the first inversion compensation table is established according to the previous gray scale value, the subsequent gray scale value and the compensated gray scale value.
  • the process of determining the compensated gray scale value may include the following steps: Step S510, detecting the display brightness for which the rear gray scale value is directed may be detected by a light sensor and an oscilloscope. In step S520, the display brightness targeted at the rear gray scale value and the standard brightness are compared. In step S530, it is determined whether the display brightness is less than or equal to the standard brightness. When the display brightness is less than or equal to the standard brightness, step S540 is executed, and the subsequent gray scale value is used as the compensated gray scale value.
  • the reduced subsequent gray scale value corresponding to the display brightness is the compensated gray scale value.
  • the standard brightness may refer to the desired ideal display brightness under the conditions of the former gray scale value and the latter gray scale value.
  • the detection of the standard brightness for the previous grayscale value may include: displaying any pixel according to the previous grayscale value.
  • the above-mentioned detection of the display brightness for the rear grayscale value includes: performing a test inversion operation on the polarity inversion signal. Then, according to the subsequent grayscale value, any pixel in the subsequent frame of the test inversion operation is displayed. Next, the light sensor and the oscilloscope are used to detect the display brightness of any pixel in the subsequent frame of the test inversion operation, as the display brightness targeted at the rear gray scale value.
  • the process of reducing the subsequent grayscale value to obtain the compensated grayscale may include: performing when the display brightness is greater than the standard brightness Cyclic decrement process until the display brightness for the lower gray level value after reduction is less than or equal to the standard brightness.
  • the reduced subsequent grayscale value is used as the compensation grayscale value.
  • the above-mentioned cyclic decrement process includes: lowering the after-gray scale value by a specified threshold, and detecting the display brightness for the reduced after-gray scale value. Then compare the reduced display brightness and standard brightness for the lower gray level value. The process of detecting the display brightness targeted for the lower gray scale value after each decrease is the same as the above process for detecting the display brightness targeted for the rear gray scale value, and will not be described here.
  • the display brightness is detected from the latter grayscale value. If the display brightness is less than or equal to the standard brightness, the The post-gray scale value is used as the compensated gray-scale value; if the display brightness is greater than the standard brightness, the post-gray scale value will be reduced by a specified threshold to continue detection and comparison until the display brightness is less than or equal to the standard brightness.
  • the specified threshold may be a first-level grayscale value or a multi-level grayscale value.
  • the rear gray scale value is 127
  • the display brightness against the 127 gray scale value after the test inversion operation is detected, and the display brightness is compared with the standard brightness
  • the standard brightness is the display brightness for the 127 gray scale value before the test inversion operation.
  • the post-gray scale value is 127
  • the display brightness is greater than the standard brightness, and the post-gray scale value is reduced to 126.
  • the compensated gray scale value is 126.
  • the compensation grayscale value of each previous grayscale value and its corresponding subsequent grayscale value can be obtained, the pixel voltage of the corresponding pixel is compensated by the compensation grayscale value, and the compensation grayscale value obtained by this method Accurate, so the compensation of the pixel voltage is accurate, which is conducive to improving the display quality.
  • the step S240 of establishing the inversion compensation table may include: establishing a second inversion compensation table.
  • the above-mentioned establishment of the second inversion compensation table may include a first process, a second process, and a third process.
  • the first preceding grayscale value and the first following grayscale value are obtained, and the first preceding grayscale value and the first following grayscale value are the same. Detecting and detecting the first standard brightness for the first preceding grayscale value and the first display brightness for the first subsequent grayscale value, respectively. Then compare the first display brightness with the first standard brightness. When the first display brightness is greater than the first standard brightness, the first subsequent grayscale value is reduced to obtain a first compensated grayscale value, and the display brightness for the first compensated grayscale value is less than or equal to the first standard brightness.
  • the second preceding grayscale value and the second following grayscale value are obtained, and the second preceding grayscale value and the second following grayscale value are the same.
  • the second standard brightness for the second preceding grayscale value and the second display brightness for the second preceding grayscale value are respectively detected. Then compare the second display brightness with the second standard brightness. When the second display brightness is greater than the second standard brightness, the second subsequent grayscale value is reduced to obtain a second compensated grayscale value, and the display brightness for the second compensated grayscale value is less than or equal to the second standard brightness.
  • the third compensation gray scale value is calculated according to the first preceding gray scale value, the second following gray scale value, the first compensation gray scale, and the second compensation gray scale.
  • the first post-gray scale value and the second post-gray scale value are different, and the third compensation gray-scale value is any pixel switching from the first previous gray-scale value of the previous frame to the next frame during the inversion operation
  • the second is the compensated gray-scale value at the time of the gray-scale value.
  • a second inversion compensation table is established based on the first preceding grayscale value, the second following grayscale value, and the third compensation grayscale.
  • one pixel is displayed as the first previous grayscale value, and a static picture is displayed.
  • the theoretical grayscale value of the one pixel is the first A post-gray scale value, that is, the first post-gray scale value is the same as the first pre-gray scale value.
  • another pixel is displayed as the second previous grayscale value, displaying a static picture, and in the subsequent frame of the test inversion operation, the theoretical gray of the other pixel
  • the level value is the second-gray-level value, that is, the second-gray-level value is the same as the second-gray-level value.
  • the previous grayscale value of the same pixel before and after the test inversion operation is different from the subsequent grayscale value, for example, the display gray of a pixel in the previous frame during the test inversion operation
  • the level value is the first preceding gray level value.
  • the second gray level value is the second. After the gray level value, the first compensated gray level value and the second compensated gray level value, the third compensated gray level value is calculated.
  • the display brightness for which the first and second post-gray scale values are detected can be detected by a light sensor and an oscilloscope. Compare the first display brightness corresponding to the first subsequent gray scale value with the first standard brightness. When the first display brightness is less than or equal to the first standard brightness, the first post gray scale value is used as the first compensation gray scale. When the first display brightness is greater than the first standard brightness, the first post-grayscale value is reduced, the display brightness corresponding to the reduced grayscale is detected, and compared with the first standard brightness until the display brightness is less than or equal to the first standard brightness. At this time, the gray scale corresponding to the display brightness is the first compensated gray scale. Similarly, the second compensated gray scale can also be obtained by the above method.
  • the first standard brightness may refer to the desired ideal display brightness under the conditions of the first preceding grayscale value and the first following grayscale value
  • the second standard brightness may refer to the second preceding grayscale value and the first 2.
  • the desired ideal display brightness Under the condition of post-gray scale value, the desired ideal display brightness.
  • Table 1 is an inversion compensation table provided by an exemplary embodiment of the present disclosure.
  • the first compensated gray scale value is the compensated gray scale at the diagonal line in the figure
  • the first rear gray scale value is the same as the first front gray scale value
  • the display screen is a static screen.
  • the display brightness of the first subsequent gray level value in the subsequent frame of the test reversal operation is detected, and the display brightness is compared with the standard brightness. If the display brightness is less than or equal to the standard brightness, the first subsequent grayscale value is used as the compensated grayscale value; if the display brightness is greater than the standard brightness, the first subsequent grayscale value is reduced by a specified threshold to continue detection and comparison until the display brightness is less than or equal to Standard brightness.
  • the specified threshold may be one gray level or multiple gray levels.
  • the first row in Table 1 can be the front gray scale value
  • the first column can be the rear gray scale value
  • the table is the compensated gray scale value
  • the diagonal data in the table is obtained by detection, and is blank The data at can be calculated.
  • the inversion compensation table is only a schematic table, which is not specifically limited in this disclosure.
  • the process of calculating the third compensated gray scale value according to the first preceding gray scale value, the second after gray scale value, the first compensated gray scale value, and the second compensated gray scale value may include: According to the first preceding grayscale value, the first compensated grayscale value and the second compensated grayscale value, the third compensated grayscale value is calculated by a linear difference.
  • the first preceding gray level value and the first following gray level value are H11
  • the first compensation gray level value is H12
  • the second preceding gray level value and the second following gray level value are H21
  • the second compensation The gray scale value is H22.
  • k is the compensation coefficient, and its value is obtained according to the experience in practical application.
  • the above display voltage compensation method may further include: step S250, receiving a polarity control signal, which is used to instruct to enter the polarity inversion compensation mode.
  • the display Since the display will over-drive after the inversion operation against the POL signal occurs, the display screen will flicker, so the inversion operation is compensated by the display voltage compensation method provided by the embodiments of the present disclosure.
  • Receiving the polarity control signal for controlling the polarity inversion it enters the inversion compensation mode, and obtains the compensated gray scale value according to the previous gray scale value and the subsequent gray scale value.
  • the pixel voltage of any pixel is compensated according to the compensated gray scale value of any pixel.
  • the above compensation of the pixel voltage of any pixel according to the compensation gray scale may include: calculating the compensation amount of the pixel voltage of the any pixel according to the compensation gray scale value, and performing the calculation of the pixel voltage of the any pixel make up.
  • the display voltage compensation method provided by the present disclosure compensates the pixel voltage of the pixel in the subsequent frame of the inversion operation, so that the display brightness after the compensation and the display brightness before the inversion operation are consistent. Solved the problem of screen flicker caused by reverse operation.
  • the timing controller may include two compensation methods for processing data: normal compensation and reverse compensation.
  • the Vx1 receiver in the timing controller receives the data signal and decodes the data signal, and then the decoded data signal undergoes digital gamma calibration, jitter processing, and compensation module processing, and then is pushed to the line register , Waiting for output to the source line.
  • the Vx1 receiver receives the data signal and decodes the data signal.
  • the decoded data signal undergoes digital gamma calibration, jitter processing, and compensation
  • the microcontroller sends a control signal to transfer the compensated data signal to the inversion compensation module, and compensates the data signal according to the position of the data signal in the post-gray value in the inversion compensation table, reducing the data signal correspondence The gray-scale value of, and then push the data signal to the line register, waiting for output to the source line.
  • Exemplary embodiments of the present disclosure also provide a display compensation device.
  • the display voltage compensation device 700 includes:
  • the polarity inversion module 710 is used to invert the polarity inversion signal of any pixel.
  • the compensation grayscale acquisition module 720 is used to acquire the previous grayscale value and the subsequent grayscale value of any pixel.
  • the polarity inversion signal is used to control the polarity of the pixel voltage of any pixel
  • the gray scale value in the front is the gray scale value of any pixel in the previous frame in the reverse operation
  • the gray scale value in the rear is reversed
  • the grayscale value of any pixel in the subsequent frame can obtain the compensated grayscale value from the inversion compensation table according to the preceding grayscale value and the following grayscale value, the inversion compensation table including the value of the previous grayscale value, the subsequent grayscale value and the compensation grayscale value Mapping relationship.
  • the compensation module 730 is connected to the compensation gray scale acquisition module 720, and is used to compensate the pixel voltage of any pixel according to the compensation gray scale value when displaying the subsequent frame of the inversion operation.
  • the display compensation device includes a compensation grayscale acquisition module 720 and a compensation module 730.
  • the compensation grayscale acquisition module 720 acquires the compensation grayscale from the inversion compensation table according to the previous grayscale value and the subsequent grayscale value Value
  • the compensation module 730 compensates the pixel voltage by compensating the gray scale value.
  • the display voltage compensation device 800 may include a storage module in addition to the above-mentioned polarity inversion module 710, compensation grayscale acquisition module 720, and compensation module 730 740, connected with the compensation gray scale acquisition module 720, and used to store the inversion compensation table.
  • the display voltage compensation device 900 may include a control module in addition to the above-mentioned polarity inversion module 710, compensation grayscale acquisition module 720, and compensation module 730 750, for receiving a polarity control signal, and in response to the polarity control signal to control the compensation gray scale acquisition module 720 to obtain a compensation gray scale value.
  • the display voltage compensation device 700, 800, or 900 may be provided in the timing controller, as shown in FIG. 10, the timing controller may include a Vx1 receiver 101, a built-in self-test control module 102, and image processing Module 103, digital gamma calibration module 104, jitter processing module 105, compensation module 109, memory control module 108, frame temporary storage module 107, microcontroller 106, line temporary storage module 110 and CEDS (ClockEmbeddedDifferentialDifferentialSignaling, clock embedding Differential signal) transmitter 111 and so on.
  • the timing controller may include two compensation methods for processing data: normal compensation and reverse compensation.
  • the Vx1 receiver 101 in the timing controller receives the data signal and decodes the data signal, and then the decoded data signal is processed by the digital gamma calibration module 104, the jitter processing module 105, and the compensation module 109. Push to the line register 110, waiting for output to the source line through the CEDS transmitter 111.
  • the inversion over-compensation mode is entered.
  • the Vx1 receiver 101 receives the data signal and decodes the data signal, and then the decoded data signal passes through the digital gamma calibration module 104, After the jitter processing module 105 and the compensation module 109 process, the microcontroller 106 sends a control signal to transmit the compensated data signal to the display compensation device 700, according to the position of the data signal in the inverse compensation table after the gray level value, the The data signal is compensated to reduce the gray scale corresponding to the data signal, and then the data signal is pushed to the row register 110 and waits for output to the source line through the CEDS transmitter 111.
  • modules or units of the display compensation device are mentioned in the above detailed description, this division is not mandatory.
  • the features and functions of the two or more modules or units described above may be embodied in one module or unit.
  • the features and functions of one module or unit described above can be further divided into multiple modules or units to be embodied.
  • FIG. 11 is a block diagram of a display device provided by an embodiment of the present disclosure.
  • the display device 1100 may include a display voltage compensation device 1110.
  • the display voltage compensation device 1110 may be the display voltage compensation device 700, 800, or 900 described above.
  • the display voltage compensation devices 700, 800 have been described above. Or 900 for a detailed description, not repeat them here.
  • the display device may further include: a pixel circuit, a backlight module, a display module, etc., because they are all prior art embodiments of the present disclosure and will not be repeated here.
  • the display device may include, for example, any product or component with a display function, such as a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, and a navigator.
  • FIG. 12 schematically shows a block diagram of a display device suitable for implementing the method described above according to an embodiment of the present disclosure.
  • the display device shown in FIG. 12 is only an example, and should not bring any limitation to the functions and use scope of the embodiments of the present disclosure.
  • the display device 1200 includes one or more processors 1210 and a computer-readable storage medium 1220.
  • the display device 1200 may perform the method according to the embodiment of the present disclosure.
  • the processor 1210 may include, for example, a general-purpose microprocessor, an instruction set processor and/or related chipsets, and/or a dedicated microprocessor (for example, an application specific integrated circuit (ASIC)), and so on.
  • the processor 810 may also include on-board memory for caching purposes.
  • the processor 1210 may be a single processing unit or a plurality of processing units for performing different actions of the method flow according to the embodiments of the present disclosure.
  • the computer-readable storage medium 1220 may be, for example, a non-volatile computer-readable storage medium. Specific examples include but are not limited to: magnetic storage devices such as magnetic tapes or hard disks (HDD); optical storage devices such as optical disks (CD-ROM) ; Memory, such as random access memory (RAM) or flash memory; and so on.
  • magnetic storage devices such as magnetic tapes or hard disks (HDD)
  • optical storage devices such as optical disks (CD-ROM)
  • Memory such as random access memory (RAM) or flash memory; and so on.
  • the computer-readable storage medium 1220 may include a computer program 1221, which may include code/computer-executable instructions, which when executed by the processor 1210 cause the processor 1210 to perform the method according to an embodiment of the present disclosure or any variation thereof.
  • the computer program 1221 may be configured to have, for example, computer program code including computer program modules.
  • the code in the computer program 1221 may include one or more program modules, including, for example, 1221A, module 1221B, .... It should be noted that the division mode and number of modules are not fixed, and those skilled in the art may use appropriate program modules or program module combinations according to actual conditions.
  • the processor 1210 may The method according to an embodiment of the present disclosure or any variant thereof is performed.
  • the present disclosure also provides a computer-readable storage medium.
  • the computer-readable storage medium may be included in the device/apparatus/system described in the above embodiments; or may exist alone without being assembled into the device/ Device/system.
  • the above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to an embodiment of the present disclosure is implemented.
  • the computer-readable storage medium may be a non-volatile computer-readable storage medium, which may include, but is not limited to, a portable computer disk, a hard disk, a random access memory (RAM), and a read-only memory (ROM) , Erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.
  • the computer-readable storage medium may be any tangible medium that contains or stores a program, and the program may be used by or in combination with an instruction execution system, apparatus, or device.

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Abstract

一种显示电压补偿方法及装置（700，800，900，1110）、显示装置（1100）和显示设备（1200），显示电压补偿方法包括：在针对任一像素的极性反转信号进行反转操作时，获取任一像素的在前灰阶值和在后灰阶值（S210），其中，极性反转信号用于控制任一像素的像素电压的极性，在前灰阶值为反转操作的在前帧中任一像素的灰阶值，在后灰阶值为反转操作的在后帧中任一像素的灰阶值；根据在前灰阶值和在后灰阶值从反转补偿表中获取补偿灰阶值，反转补偿表包括在前灰阶值、在后灰阶值和补偿灰阶值之间的映射关系（S220）；在显示反转操作的在后帧时，根据补偿灰阶值，对任一像素的像素电压进行补偿（S230）。

Description

显示电压补偿方法及装置、显示装置和显示设备
本申请要求于2019年1月8日提交的、申请号为201910016011.1的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域，具体而言，涉及一种显示电压补偿方法、显示电压补偿装置、显示装置和显示设备。
背景技术
在大尺寸面板中，比如，65寸以上的面板，长时间显示静态画面时，像素点上会产生偏置电压，易造成残像。为了改善残像，通常会在预设时间间隔针对像素的极性反转(Polarity Inversion，POL)信号进行一次反转操作，使得像素点上的偏置电压抵消。但是当反转操作前后两帧的像素电压极性相同时，液晶会向同一方向偏转，使得后一帧液晶偏转角度过大，造成液晶过驱动，导致前后帧画面亮度存在差异，造成画面短暂闪烁。
发明内容
本公开提供了一种显示电压补偿方法及装置、显示装置和显示设备。
根据本公开的一个方面，提供一种显示电压补偿方法，所述显示电压补偿方法包括：在针对任一像素的极性反转信号进行反转操作时，获取该任一像素的在前灰阶值和在后灰阶值。其中，极性反转信号用于控制该任一像素的像素电压的极性，在前灰阶值为反转操作的在前帧中该任一像素的灰阶值，在后灰阶值为反转操作的在后帧中该任一像素的灰阶值。然后，根据上述在前灰阶值和在后灰阶值从反转补偿表中获取补偿灰阶值。其中，反转补偿表包括上述在前灰阶值、在后灰阶值和补偿灰阶值之间的映射关系。接着，在显示反转操作的在后帧时，根据上述补偿灰阶值，对该任一像素的像素电压进行补偿。
例如，在上述根据在前灰阶值和在后灰阶值，从反转补偿表中获取补偿灰阶值之前，上述显示电压补偿方法还包括：建立反转补偿表。
例如，上述建立所述反转补偿表包括：建立第一反转补偿表。建立第一反转补偿表 包括：检测在前灰阶值针对的标准亮度，检测在后灰阶值针对的显示亮度。然后，比较上述显示亮度和标准亮度。当上述显示亮度大于标准亮度时，降低在后灰阶值以得到补偿灰阶值，补偿灰阶值所针对的显示亮度小于等于标准亮度。接着，根据所述在前灰阶值、在后灰阶值和补偿灰阶值，建立第一反转补偿表。
例如，上述检测在前灰阶值针对的标准亮度包括：根据在前灰阶值，对任一像素进行显示。检测该任一像素的显示亮度，以作为在前灰阶值针对的标准亮度。
例如，上述检测在后灰阶值针对的显示亮度包括：对极性反转信号进行测试反转操作。然后，根据在后灰阶值，对测试反转操作的在后帧中任一像素进行显示。接着，检测测试反转操作的在后帧中该任一像素的显示亮度，以作为在后灰阶值针对的显示亮度。
例如，所述当显示亮度大于标准亮度时，降低所述在后灰阶值以得到补偿灰阶值包括：当显示亮度大于标准亮度时，执行循环递减过程，直至降低后的在后灰阶值所针对的显示亮度小于等于标准亮度。并且，当降低后的在后灰阶值所针对的显示亮度小于等于标准亮度时，将降低后的在后灰阶值作为上述补偿灰阶值。上述循环递减过程包括：将在后灰阶值降低一指定阈值，并检测降低后的在后灰阶值所针对的显示亮度。然后比较降低后的在后灰阶值针对的显示亮度和标准亮度。
例如，上述建立所述反转补偿表包括：建立第二反转补偿表。建立第二反转补偿表包括：一方面，获取第一在前灰阶值和第一在后灰阶值，第一在前灰阶值和第一在后灰阶值相同。分别检测第一在前灰阶值针对的第一标准亮度和第一在后灰阶值针对的第一显示亮度。然后比较第一显示亮度和第一标准亮度。当第一显示亮度大于所述第一标准亮度时，降低第一在后灰阶值以得到第一补偿灰阶值，第一补偿灰阶值所针对的显示亮度小于等于第一标准亮度。另一方面，获取第二在前灰阶值和第二在后灰阶值，第二在前灰阶值和第二在后灰阶值相同。分别检测第二在前灰阶值针对的第二标准亮度和第二在后灰阶值针对的第二显示亮度。然后比较第二显示亮度和第二标准亮度。当第二显示亮度大于第二标准亮度时，降低第二在后灰阶值以得到第二补偿灰阶值，第二补偿灰阶值所针对的显示亮度小于等于第二标准亮度。接着，根据第一在前灰阶值、第一补偿灰阶、第二在后灰阶值和第二补偿灰阶值，计算针对第一在前灰阶值和第二在后灰阶值的第三补偿灰阶值。接着，根据第一在前灰阶值、第二在后灰阶值和第三补偿灰阶建立第二反转补偿表。
例如，根据第一在前灰阶值、第一补偿灰阶、第二在后灰阶值和第二补偿灰阶值，计算第三补偿灰阶值包括：根据所述第一在前灰阶值、第一补偿灰阶、和第二补偿灰阶，通过线性差值计算所述第三补偿灰阶值。
例如，上述根据在前灰阶值和在后灰阶值，从反转补偿表中获取补偿灰阶值之前，上述方法还包括：接收极性控制信号，并响应极性控制信号以进入极性反转补偿模式。
根据本公开的另一方面，提供一种显示电压补偿装置，包括：极性反转模块，用于针对任一像素的极性反转信号进行反转操作。补偿灰阶获取模块，用于获取任一像素的在前灰阶值和在后灰阶值。其中，极性反转信号用于控制任一像素的像素电压的极性，在前灰阶值为反转操作的在前帧中任一像素的灰阶值，在后灰阶值为反转操作的在后帧中任一像素的灰阶值。并根据在前灰阶值和在后灰阶值，从反转补偿表中获取补偿灰阶值，所述反转补偿表包括在前灰阶值、在后灰阶值和补偿灰阶值之间的映射关系。补偿模块和所述补偿灰阶获取模块连接，用于在显示所述反转操作的在后帧时，根据补偿灰阶值，对任一像素的像素电压进行补偿。
例如，所述显示电压补偿装置还包括：存储模块，和补偿灰阶获取模块连接，用于存储反转补偿表。
例如，显示电压补偿装置还包括：控制模块，用于接收极性控制信号，并响应极性控制信号以控制补偿灰阶获取模块获取所述补偿灰阶值。
根据本公开的又一方面，提供一种显示装置，包括上述的显示电压补偿装置。
根据本公开的再一方面，提供一种显示设备，包括存储器和至少一个处理器。存储器配置为存储指令。至少一个处理器执行存储在存储器中的指令，以实现上述显示电压补偿方法。
本公开提供的显示电压补偿方法根据在前灰阶值和在后灰阶值从反转补偿表中获取补偿灰阶值，通过补偿灰阶值对像素电压进行补偿，解决了液晶过驱动导致的静态画面下反转操作前后画面亮度存在差异，造成画面短暂闪烁的问题，提升了显示品质。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
通过参照附图来详细描述其示例实施例，本公开的上述和其它特征及优点将变得更 加明显。
图1为一种反转操作前后显示亮度的示意图；
图2为本公开实施例提供的一种显示电压补偿方法的流程图；
图3为本公开实施例提供的另一种显示电压补偿方法的流程图；
图4为本公开实施例提供的又一种显示电压补偿方法的流程图；
图5为本公开实施例提供的一种补偿灰阶值确定方法的流程图；
图6为本公开实施例提供的一种反转操作前后显示亮度的示意图；
图7为本公开实施例提供的一种显示电压补偿装置的框图；
图8为本公开实施例提供的另一种显示电压补偿装置的框图；
图9为本公开实施例提供的又一种显示电压补偿装置的框图；
图10为本公开实施例提供的一种时序控制器的示意图；
图11为本公开实施例提供的一种显示装置的框图；以及
图12为本公开实施例提供的一种显示设备的框图。
具体实施方式
现在将参考附图更全面地描述示例实施例。然而，示例实施例能够以多种形式实施，且不应被理解为限于在此阐述的实施例；相反，提供这些实施例使得本公开将全面和完整，并将示例实施例的构思全面地传达给本领域的技术人员。在图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
此外，所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中，提供许多具体细节从而给出对本公开的实施例的充分理解。然而，本领域技术人员将意识到，可以实践本公开的技术方案而没有所述特定细节中的一个或更多，或者可以采用其它的方法、组元、材料、装置、步骤等。在其它情况下，不详细示出或描述公知结构、方法、装置、实现、材料或者操作以避免模糊本公开的各方面。
附图中所示的方框图仅仅是功能实体，不一定必须与物理上独立的实体相对应。即，可以采用软件形式来实现这些功能实体，或在一个或多个软件硬化的模块中实现这些功能实体或功能实体的一部分，或在不同网络和/或处理器装置和/或微控制器装置中实现这些功能实体。
此外，在本公开实施例的描述中，除非另外定义，本公开使用的技术术语或者科学 术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”、“一”或者“该”等类似词语也不表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者部件及其等同，而不排除其他元件或者部件。
通常情况下，大尺寸4K显示面板，例如65寸以上的TV面板，正负极性对像素的偏置电压无法抵消，长时间显示静态画面，像素点上会有一个等效的正向或负向的偏置电压，会容易造成残像。为了改善残像，例如通常每隔28秒针对POL信号进行一次反转操作，使反转操作前后的偏置电压相互抵消，液晶上等效直流电压为零，从而改善残像，该方法可称为“28秒极性反转”。如图1所示，28秒时进行反转操作，反转操作前后两帧像素电压极性相同，液晶向同一方向偏转，反转操作的在后帧的液晶偏转角度更大，表现为在后帧存在ΔL的亮度增益，亮度更大，静态画面下前后帧的亮度存在差异，造成画面短暂闪烁一次，影响画质。
对于上述问题，一种处理方式在于针对反转操作的在前帧正常充电，而降低针对反转操作的在后帧的充电时间，以减小在后帧中液晶的偏转角度，中和在后帧中液晶的过驱效应。该方法不足之处有两点：首先，按行开启分压，容易造成在后帧充电不足，亮度下降过多，整体亮度低于上一帧，而引起闪烁。其次，大尺寸TV面板，远端电路负载大，容易造成远端的充电不足，近端充电较好，远端亮度与近端亮度差异大，在后帧的远端亮度相比在前帧相同位置降低多，在后帧的近端亮度相比在前帧相同位置降低少，引起远端局部闪烁。
本公开示例性实施例首先提供一种显示电压补偿方法，应注意，以下方法中各个步骤的序号仅作为该步骤的表示以便描述，而不应被看作表示该各个步骤的执行顺序。除非明确指出，否则该方法不需要完全按照所示顺序来执行。如图2所示，该显示电压补偿方法可以包括如下步骤。
步骤S210，在针对任一像素的极性反转信号进行反转操作时，获取该任一像素的在前灰阶值和在后灰阶值。
步骤S220，根据在前灰阶值和在后灰阶值从反转补偿表中获取补偿灰阶值，反转补偿表包括在前灰阶值、在后灰阶值和补偿灰阶值之间的映射关系。
步骤S230，在显示反转操作的在后帧时，根据补偿灰阶值，对该任一像素的像素电压进行补偿。
其中，极性反转信号用于控制该任一像素的像素电压的极性。在前灰阶值为反转操作的在前帧中该任一像素所显示的灰阶值，在后灰阶值为反转操作的在后帧中该任一像素的灰阶值，即在反转操作的在后帧中该任一像素所要显示的理论灰阶值，补偿灰阶值为在实际显示中使得反转操作前后显示的画面亮度稳定，不发生闪烁的实际显示灰阶值。
本公开实施例提供的显示补偿方法根据在前灰阶值和在后灰阶值从反转补偿表中获取补偿灰阶值，通过补偿灰阶值对任一像素的像素电压进行补偿，解决了极性反转前后两帧像素电压极性相同时，液晶过驱动导致的静态画面下反转操作前后画面亮度存在差异，造成画面短暂闪烁的问题。并且由于未对充电时间进行变化，不会产生如上文所述的处理方式中因大尺寸面板远端的充电不足、近端充电较好，而造成的远端局部闪烁问题，提升了显示品质。
进一步的，如图3所示，在步骤S210之前上述显示电压补偿方法还可以包括步骤S240。
步骤S240，建立反转补偿表。
其中，建立反转补偿表，即为建立在前灰阶值、在后灰阶值和补偿灰阶值之间的映射关系。可以通过试验的方式获取在前灰阶值、在后灰阶值和补偿灰阶值之间的映射关系。
比如，可以采用如下的方式获取在前灰阶值、在后灰阶值和补偿灰阶值之间的映射关系：通过光线传感器和示波器获取在前灰阶值、在后灰阶值和补偿灰阶的映射关系。在试验中，针对极性反转信号进行测试反转操作，利用光线传感器检测测试反转操作前后的屏幕画面亮度，将亮度信号转化为电信号输入滤波器，通过滤波器观察测试反转操作的在前帧和前后的显示亮度，若测试反转操作的在后帧所针对的显示亮度大于标准亮度，则降低在后灰阶值，直至降低后的在后灰阶值所针对的显示亮度小于等于标准亮度，此时的降低后的在后灰阶值即为补偿灰阶值。
在本公开示例提供的一种可行的实施方式中，步骤S240，建立所述反转补偿表可以包括：建立第一反转补偿表。
示例性地，上述建立第一反转补偿表可以包括：检测在前灰阶值针对的标准亮度， 检测所述在后灰阶值针对的显示亮度。然后，比较上述显示亮度和标准亮度。当在后灰阶值针对的显示亮度大于标准亮度时，降低在后灰阶值以得到补偿灰阶值。其中，补偿灰阶值所针对的显示亮度小于等于标准亮度。接着，再根据在前灰阶值、在后灰阶值和补偿灰阶值建立第一反转补偿表。
例如，如图5所示，确定补偿灰阶值的过程可以包括如下步骤：步骤S510，检测在后灰阶值针对的显示亮度可以通过光线传感器和示波器进行检测。步骤S520，将在后灰阶值针对的显示亮度和标准亮度进行比较。步骤S530，确定显示亮度是否小于等于标准亮度。当显示亮度小于等于标准亮度时，执行步骤S540，将在后灰阶值作为补偿灰阶值。当显示亮度大于标准亮度时，降低在后灰阶值，重新检测降低后的在后灰阶值针对的显示亮度，并和标准亮度比较，直至降低后的在后灰阶值所针对的显示亮度小于等于标准亮度。此时，该显示亮度对应的降低后的在后灰阶值即为补偿灰阶值。标准亮度可以是指在在前灰阶值和在后灰阶值条件下，所期望的理想显示亮度。
示例性地，上述检测在前灰阶值针对的标准亮度可以包括：根据在前灰阶值，对任一像素进行显示。利用光线传感器和示波器检测该任一像素的显示亮度，以作为在前灰阶值针对的标准亮度。上述检测在后灰阶值针对的显示亮度包括：对极性反转信号进行测试反转操作。然后，根据在后灰阶值，对测试反转操作的在后帧中任一像素进行显示。接着，利用光线传感器和示波器检测测试反转操作的在后帧中该任一像素的显示亮度，以作为在后灰阶值针对的显示亮度。
根据本公开的实施例，当在后灰阶值所针对的显示亮度大于标准亮度时，降低在后灰阶值以得到所述补偿灰阶的过程可以包括：当显示亮度大于标准亮度时，执行循环递减过程，直至降低后的在后灰阶值所针对的显示亮度小于等于标准亮度。并且，当降低后的在后灰阶值所针对的显示亮度小于等于标准亮度时，将降低后的在后灰阶值作为上述补偿灰阶值。其中，上述循环递减过程包括：将在后灰阶值降低一指定阈值，并检测降低后的在后灰阶值所针对的显示亮度。然后比较降低后的在后灰阶值针对的显示亮度和标准亮度。每次检测降低后的在后灰阶值针对的显示亮度的过程与上文中检测在后灰阶值针对的显示亮度的过程原理相同，在此不再赘述。
在测试反转操作前后，当一像素的灰阶值从在前灰阶值跳转到在后灰阶值时，从在后灰阶值开始检测显示亮度，若显示亮度小于等于标准亮度，将在后灰阶值作为补偿灰阶值；若显示亮度大于标准亮度，将在后灰阶值降低一指定阈值继续检测比较，直至显 示亮度小于等于标准亮度。其中，指定阈值可以是一级灰阶值或者多级灰阶值。
示例性地，在前灰阶值为127，静态显示画面，则在后灰阶值为127，检测测试反转操作后的127灰阶值针对的显示亮度，将该显示亮度和标准亮度进行比较，此时标准亮度为测试反转操作前127灰阶值针对的显示亮度。经检测，当在后灰阶值为127时，显示亮度大于标准亮度，将在后灰阶值降低至126，此时检测在测试反转操作后的126灰阶值针对的显示亮度小于标准亮度，则补偿灰阶值为126。
通过上述方式可以获取每一个在前灰阶值和其对应的在后灰阶值的补偿灰阶值，通过补偿灰阶值对相应像素的像素电压进行补偿，通过该方法获得的补偿灰阶值准确，因此对像素电压的补偿精确，有利于提升显示品质。
在本公开实施例提供的另一种可行的实施方式中，步骤S240建立反转补偿表可以包括：建立第二反转补偿表。
示例性地，上述建立第二反转补偿表可以包括第一过程、第二过程和第三过程。
在第一过程中，获取第一在前灰阶值和第一在后灰阶值，第一在前灰阶值和第一在后灰阶值相同。分别检测检测第一在前灰阶值针对的第一标准亮度和第一在后灰阶值针对的第一显示亮度。然后比较第一显示亮度和第一标准亮度。当第一显示亮度大于第一标准亮度时，降低第一在后灰阶值以得到第一补偿灰阶值，第一补偿灰阶值所针对的显示亮度小于等于第一标准亮度。
在第二过程中，获取第二在前灰阶值和第二在后灰阶值，第二在前灰阶值和第二在后灰阶值相同。分别检测第二在前灰阶值针对的第二标准亮度和第二在后灰阶值针对的第二显示亮度。然后比较第二显示亮度和第二标准亮度。当第二显示亮度大于第二标准亮度时，降低第二在后灰阶值以得到第二补偿灰阶值，第二补偿灰阶值所针对的显示亮度小于等于第二标准亮度。
在第三过程中，根据第一在前灰阶值、第二在后灰阶值、第一补偿灰阶和第二补偿灰阶，计算第三补偿灰阶值。其中，第一在后灰阶值和第二在后灰阶值不同，第三补偿灰阶值为反转操作时任一像素从在前帧的第一在前灰阶值切换到在后帧的第二在后灰阶值时的补偿灰阶值。然后，根据第一在前灰阶值、第二在后灰阶值和第三补偿灰阶建立第二反转补偿表。
例如，在测试反转操作的在前帧中，一个像素显示为第一在前灰阶值，显示静态画面，在测试反转操作的在后帧中，该一个像素的理论灰阶值为第一在后灰阶值，也即是 第一在后灰阶值和第一在前灰阶值相同。同理地，在测试反转操作的在前帧中，另一像素显示为第二在前灰阶值，显示静态画面，在测试反转操作的在后帧中，该另一像素的理论灰阶值为第二在后灰阶值，也即是第二在后灰阶值和第二在前灰阶值相同。当测试反转操作前后显示的画面有变化，测试反转操作前后同一像素的在前灰阶值和在后灰阶值不同，例如，在测试反转操作的在前帧中一个像素的显示灰阶值为第一在前灰阶值，在测试反转操作的在后帧中一个像素的理论灰阶值为第二在后灰阶值时，根据第一在前灰阶值、第二在后灰阶值、第一补偿灰阶值和第二补偿灰阶值，计算第三补偿灰阶值。
示例性地，检测第一在后灰阶值和第二在后灰阶值针对的显示亮度可以通过光线传感器和示波器进行检测。将第一在后灰阶值对应的第一显示亮度和第一标准亮度进行比较，当第一显示亮度小于等于第一标准亮度时，第一在后灰阶值作为第一补偿灰阶，当第一显示亮度大于第一标准亮度时，降低第一在后灰阶值，检测降低后的灰阶对应的显示亮度，并和第一标准亮度比较，直至显示亮度小于等于第一标准亮度。此时，该显示亮度对应的灰阶即为第一补偿灰阶。同理第二补偿灰阶也可以通过上述方法获得。第一标准亮度可以是指在第一在前灰阶值和第一在后灰阶值条件下，所期望的理想显示亮度，第二标准亮度可以是指在第二在前灰阶值和第二在后灰阶值条件下，所期望的理想显示亮度。
表1为本公开示例性实施例提供的一种反转补偿表。如表1所示，第一补偿灰阶值为图中对角线处的补偿灰阶，第一在后灰阶值和第一在前灰阶值相同，显示画面为静态画面。在静态画面下检测测试反转操作的在后帧中第一在后灰阶值所针对的显示亮度，将显示亮度和标准亮度进行比较。若显示亮度小于等于标准亮度，将第一在后灰阶值作为补偿灰阶值；若显示亮度大于标准亮度，将第一在后灰阶值降低一指定阈值继续检测比较，直至显示亮度小于等于标准亮度。其中，指定阈值可以是一个灰阶或者多个灰阶。
表1 反转补偿表
  0 8 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 248 255
0 0                                    
8   7                                  
16     15                                
32       31                              
48         47                            
64           63                          
80             79                        
96               95                      
112                 111                    
128                   126                  
144                     142                
160                       158              
176                         174            
192                           189          
208                             206        
224                               222      
240                                 239    
248                                   247  
255                                     255
需要说明的是，表1中第一行可以是在前灰阶值，第一列可以是在后灰阶值，表中为补偿灰阶值，表中的对角线数据通过检测获得，空白处的数据可以通过计算获得。该反转补偿表仅为示意性表格，本公开对此不做具体限定。
示例性地，上述根据所述第一在前灰阶值、第二在后灰阶值、第一补偿灰阶值和第二补偿灰阶值，计算第三补偿灰阶值的过程可以包括：根据第一在前灰阶值、第一补偿灰阶值和第二补偿灰阶值，通过线性差值计算第三补偿灰阶值。
例如，第一在前灰阶值和第一在后灰阶值为H11，第一补偿灰阶值为H12，第二在前灰阶值和第二在后灰阶值为H21，第二补偿灰阶值为H22。此时，图5中非对角线区域，也即是从第一在前灰阶值H11切换到第二在后灰阶值H12时，第三补偿灰阶值H33的计算公式如下：
H33＝H11+k(H22-H12)
其中，k为补偿系数，其取值根据实际应用中的经验所得。
通过检测获取第一在后灰阶值对应的第一补偿灰阶值，通过计算得到从第一在前灰阶值切换到第二在后灰阶值对应的第三补偿灰阶值，只需检测反转补偿表中对角线区域的数据，对角线之外的数据即第三补偿灰阶值通过计算得到，减少了测试量，便于实现。
进一步的，如图6所示，在步骤S210之前，上述显示电压补偿方法还可以包括：步骤S250，接收极性控制信号，极性控制信号用于指示进入极性反转补偿模式。
由于屏幕会在发生针对POL信号的反转操作后，出现过驱动导致显示画面出现闪烁，因此在反转操作时通过本公开实施例提供的显示电压补偿方法进行补偿。接收到用于控制极性反转的极性控制信号，进入反转补偿模式，根据在前灰阶值和在后灰阶值获取补偿灰阶值。
在获取到补偿灰阶值后，在显示上述反转操作的在后帧时，根据任一像素的补偿灰阶值，对该任一像素的像素电压进行补偿。
示例性地，上述根据补偿灰阶，对该任一像素的像素电压进行补偿可以包括：根据补偿灰阶值，计算该任一像素的像素电压的补偿量，对该任一像素的像素电压进行补偿。
如图6所示，通过本公开提供的显示电压补偿方法对反转操作的在后帧中像素的像素电压进行补偿，使得补偿后的显示亮度和反转操作前的显示亮度一致。解决了反转操作导致的屏幕画面闪烁的问题。
需要说明的，在实际应用中时序控制器可以包括两种处理数据补偿方式：正常补偿和反转补偿。
正常补偿时，时序控制器中的Vx1接收器接收到数据信号，并对数据信号进行解码，然后解码后的数据信号经过数字伽马校准、抖动处理、补偿模块处理后，推送至行暂存器，等待输出至源极线。
反转补偿时，在极性控制信号的控制下进入反转补偿模式，Vx1接收器接收到数据信号，并对数据信号进行解码，然后解码后的数据信号经过数字伽马校准、抖动处理、补偿处理后，微控制器发送控制信号将补偿处理后的数据信号传送至反转补偿模块，根据数据信号在后灰阶值在反转补偿表中的位置，对数据信号进行补偿，降低数据信号对应的灰阶值，然后将数据信号推送至行暂存器，等待输出至源极线。
需要说明的是，尽管在附图中以特定顺序描述了本公开中方法的各个步骤，但是，这并非要求或者暗示必须按照该特定顺序来执行这些步骤，或是必须执行全部所示的步骤才能实现期望的结果。附加的或备选的，可以省略某些步骤，将多个步骤合并为一个步骤执行，以及/或者将一个步骤分解为多个步骤执行等。
本公开示例性实施例还提供一种显示补偿装置，如图7所示，显示电压补偿装置 700包括：
极性反转模块710，用于针对任一像素的极性反转信号进行反转操作。
补偿灰阶获取模块720，用于获取任一像素的在前灰阶值和在后灰阶值。其中，极性反转信号用于控制任一像素的像素电压的极性，在前灰阶值为反转操作的在前帧中任一像素的灰阶值，在后灰阶值为反转操作的在后帧中任一像素的灰阶值。并根据在前灰阶值和在后灰阶值，从反转补偿表中获取补偿灰阶值，所述反转补偿表包括在前灰阶值、在后灰阶值和补偿灰阶值之间的映射关系。
补偿模块730，和补偿灰阶获取模块720连接，用于在显示所述反转操作的在后帧时，根据补偿灰阶值，对上述任一像素的像素电压进行补偿。
本公开实施例提供的显示补偿装置，包括补偿灰阶获取模块720和补偿模块730，补偿灰阶获取模块720根据在前灰阶值和在后灰阶值从反转补偿表中获取补偿灰阶值，补偿模块730通过补偿灰阶值对像素电压进行补偿。解决了针对POL信号的反转操作后，液晶过驱动导致的静态画面下反转操作前后画面亮度存在差异，造成画面短暂闪烁的问题。并且由于未改变充电时间，不会出现大尺寸面板远端的充电不足，近端充电较好，进而造成远端局部闪烁的问题，提升了显示品质。
进一步的，根据本公开的实施例，如图8所示，显示电压补偿装置800除上述极性反转模块710、补偿灰阶获取模块720、以及补偿模块730之外，还可以包括：存储模块740，和补偿灰阶获取模块720连接，用于存储反转补偿表。
进一步的，根据本公开的实施例，如图9所示，显示电压补偿装置900除上述极性反转模块710、补偿灰阶获取模块720、以及补偿模块730之外，还可以包括：控制模块750，用于接收极性控制信号，并响应极性控制信号以控制所述补偿灰阶获取模块720获取补偿灰阶值。
在实际应用中，显示电压补偿装置700、800或900可以设置于时序控制器中，如图10所示，时序控制器中可以包括，Vx1接收器101、内建自我测试控制模块102、图像处理模块103、数字伽马校准模块104、抖动处理模块105、补偿模块109、内存控制模块108、帧暂存模块107、微控制器106、行暂存模块110和CEDS(Clock Embedded Differential Signaling，时钟嵌入差分信号)发送器111等。时序控制器可以包括两种处理数据补偿方式：正常补偿和反转补偿。
正常补偿时，时序控制器中的Vx1接收器101接收到数据信号，并对数据信号 进行解码，然后解码后的数据信号经过数字伽马校准模块104、抖动处理模块105、补偿模块109处理后，推送至行暂存器110，等待通过CEDS发送器111输出至源极线。
反转补偿时，在极性控制信号的控制下进入反转过补偿模式，Vx1接收器101接收到数据信号，并对数据信号进行解码，然后解码后的数据信号经过数字伽马校准模块104、抖动处理模块105、补偿模块109处理后，微控制器106发送控制信号将补偿处理后的数据信号传送至显示补偿装置700，根据数据信号在后灰阶值在反转补偿表中的位置，对数据信号进行补偿，降低数据信号对应的灰阶，然后将数据信号推送至行暂存器110，等待通过CEDS发送器111输出至源极线。
上述中各虚拟显示补偿装置模块的具体细节已经在对应的虚拟对象传送方法中进行了详细的描述，因此此处不再赘述。
应当注意，尽管在上文详细描述中提及了显示补偿装置的若干模块或者单元，但是这种划分并非强制性的。实际上，根据本公开的实施方式，上文描述的两个或更多模块或者单元的特征和功能可以在一个模块或者单元中具体化。反之，上文描述的一个模块或者单元的特征和功能可以进一步划分为由多个模块或者单元来具体化。
本公开示例性实施例还提供一种显示装置，图11为本公开实施例提供的一种显示装置的框图。如图11所示，该显示装置1100可以包括显示电压补偿装置1110，该显示电压补偿装置1110可以是上文中的显示电压补偿装置700、800或900，上文中已对显示电压补偿装置700、800或900进行详细说明，在此不再赘述。当然在实际应用中所述显示装置还可以包括：像素电路、背光模组和显示模组等，因其均为现有技术本公开实施例在此不复赘述。所述显示装置例如可以包括手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
图12示意性示出了根据本公开的实施例的适于实现上文描述的方法的显示设备的框图。图12示出的显示设备仅仅是一个示例，不应对本公开实施例的功能和使用范围带来任何限制。
如图12所示，显示设备1200包括一个或多个处理器1210以及计算机可读存储介质1220。该显示设备1200可以执行根据本公开实施例的方法。
例如，处理器1210例如可以包括通用微处理器、指令集处理器和/或相关芯片组和/或专用微处理器(例如，专用集成电路(ASIC))，等等。处理器810还可以包括 用于缓存用途的板载存储器。处理器1210可以是用于执行根据本公开实施例的方法流程的不同动作的单一处理单元或者是多个处理单元。
计算机可读存储介质1220，例如可以是非易失性的计算机可读存储介质，具体示例包括但不限于：磁存储装置，如磁带或硬盘(HDD)；光存储装置，如光盘(CD-ROM)；存储器，如随机存取存储器(RAM)或闪存；等等。
计算机可读存储介质1220可以包括计算机程序1221，该计算机程序1221可以包括代码/计算机可执行指令，其在由处理器1210执行时使得处理器1210执行根据本公开实施例的方法或其任何变形。
计算机程序1221可被配置为具有例如包括计算机程序模块的计算机程序代码。例如，在示例实施例中，计算机程序1221中的代码可以包括一个或多个程序模块，例如包括1221A、模块1221B、......。应当注意，模块的划分方式和个数并不是固定的，本领域技术人员可以根据实际情况使用合适的程序模块或程序模块组合，当这些程序模块组合被处理器1210执行时，使得处理器1210可以执行根据本公开实施例的方法或其任何变形。
本公开还提供了一种计算机可读存储介质，该计算机可读存储介质可以是上述实施例中描述的设备/装置/系统中所包含的；也可以是单独存在，而未装配入该设备/装置/系统中。上述计算机可读存储介质承载有一个或者多个程序，当上述一个或者多个程序被执行时，实现根据本公开实施例的方法。
根据本公开的实施例，计算机可读存储介质可以是非易失性的计算机可读存储介质，例如可以包括但不限于：便携式计算机磁盘、硬盘、随机访问存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、便携式紧凑磁盘只读存储器(CD-ROM)、光存储器件、磁存储器件、或者上述的任意合适的组合。在本公开中，计算机可读存储介质可以是任何包含或存储程序的有形介质，该程序可以被指令执行系统、装置或者器件使用或者与其结合使用。
所属技术领域的技术人员能够理解，本公开的各个方面可以实现为系统、方法或程序产品。因此，本公开的各个方面可以具体实现为以下形式，即：完全的硬件实施例、完全的软件实施例(包括固件、微代码等)，或硬件和软件方面结合的实施例，这里可以统称为“电路”、“模块”或“系统”。
此外，上述附图仅是根据本公开示例性实施例的方法所包括的处理的示意性说明， 而不是限制目的。易于理解，上述附图所示的处理并不表明或限制这些处理的时间顺序。另外，也易于理解，这些处理可以是例如在多个模块中同步或异步执行的。
本领域技术人员在考虑说明书及实践这里公开的公开后，将容易想到本公开的其他实施例。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限。

Claims (14)

  1. 一种显示电压补偿方法，包括：
    在针对任一像素的极性反转信号进行反转操作时，获取所述任一像素的在前灰阶值和在后灰阶值，其中，所述极性反转信号用于控制所述任一像素的像素电压的极性，所述在前灰阶值为所述反转操作的在前帧中所述任一像素的灰阶值，所述在后灰阶值为所述反转操作的在后帧中所述任一像素的灰阶值；
    根据所述在前灰阶值和所述在后灰阶值，从反转补偿表中获取补偿灰阶值，其中，所述反转补偿表包括所述在前灰阶值、所述在后灰阶值和所述补偿灰阶值之间的映射关系；以及
    在显示所述反转操作的在后帧时，根据所述补偿灰阶值，对所述任一像素的像素电压进行补偿。
  2. 如权利要求1所述的显示电压补偿方法，还包括：
    在所述根据所述在前灰阶值和所述在后灰阶值，从反转补偿表中获取补偿灰阶值之前，建立所述反转补偿表。
  3. 如权利要求2所述的显示电压补偿方法，其中，所述建立所述反转补偿表包括：建立第一反转补偿表，其中，包括：
    检测所述在前灰阶值针对的标准亮度；
    检测所述在后灰阶值针对的在后灰阶值显示亮度；
    比较所述显示亮度和所述标准亮度；
    当所述显示亮度大于所述标准亮度时，降低所述在后灰阶值以得到所述补偿灰阶值，其中，所述补偿灰阶值针对的显示亮度小于等于所述标准亮度；以及
    根据所述在前灰阶值、所述在后灰阶值和所述补偿灰阶值，建立所述第一反转补偿表。
  4. 根据权利要求3所述的显示电压补偿方法，其中，所述检测所述在前灰阶值针对的标准亮度包括：
    根据所述在前灰阶值，对所述任一像素进行显示；以及
    检测所述任一像素的显示亮度，以作为所述在前灰阶值针对的标准亮度。
  5. 根据权利要求3所述的显示电压补偿方法，其中，所述检测所述在后灰阶值 针对的显示亮度包括：
    对所述极性反转信号进行测试反转操作；
    根据所述在后灰阶值，对所述测试反转操作的在后帧中所述任一像素进行显示；以及
    检测所述测试反转操作的在后帧中所述任一像素的显示亮度，以作为所述在后灰阶值针对的显示亮度。
  6. 如权利要求3所述的显示电压补偿方法，其中，所述当所述显示亮度大于所述标准亮度时，降低所述在后灰阶值以得到所述补偿灰阶值，包括：
    当所述显示亮度大于所述标准亮度时，执行循环递减过程，直至降低后的在后灰阶值针对的显示亮度小于等于所述标准亮度；以及
    当所述降低后的在后灰阶值针对的显示亮度小于等于所述标准亮度时，将所述降低后的在后灰阶值作为所述补偿灰阶值；
    其中，所述循环递减过程包括：
    将所述在后灰阶值降低一指定阈值；
    检测降低后的在后灰阶值针对的显示亮度；以及
    比较降低后的在后灰阶值针对的显示亮度和所述标准亮度。
  7. 如权利要求2所述的显示电压补偿方法，其中，所述建立所述反转补偿表包括：建立第二反转补偿表，其中，包括：获取第一在前灰阶值和第一在后灰阶值，所述第一在前灰阶值和所述第一在后灰阶值相同；
    分别检测所述第一在前灰阶值针对的第一标准亮度和所述第一在后灰阶值针对的第一显示亮度；
    比较所述第一显示亮度和所述第一标准亮度；
    当所述第一显示亮度大于所述第一标准亮度时，降低所述第一在后灰阶值以得到第一补偿灰阶值，所述第一补偿灰阶值针对的显示亮度小于等于所述第一标准亮度；
    获取第二在前灰阶值和第二在后灰阶值，所述第二在前灰阶值和所述第二在后灰阶值相同；
    分别检测所述第二在前灰阶值针对的第二标准亮度和所述第二在后灰阶值针对的第二显示亮度；
    比较所述第二显示亮度和所述第二标准亮度；
    当所述第二显示亮度大于所述第二标准亮度时，降低所述第二在后灰阶值以得到第二补偿灰阶值，所述第二补偿灰阶值针对的显示亮度小于等于所述第二标准亮度；
    根据所述第一在前灰阶值、所述第一补偿灰阶值、所述第二在后灰阶值和所述第二补偿灰阶值，计算针对所述第一在前灰阶值和所述第二在后灰阶值的第三补偿灰阶值；以及
    根据所述第一在前灰阶值、所述第二在后灰阶值和所述第三补偿灰阶值，建立第二反转补偿表。
  8. 如权利要求7所述的显示电压补偿方法，其中，所述根据所述第一在前灰阶值、所述第一补偿灰阶值、所述第二在后灰阶值和所述第二补偿灰阶值，计算针对所述第一在前灰阶值和所述第二在后灰阶值的第三补偿灰阶，包括：
    根据所述第一在前灰阶值、所述第一补偿灰阶值、和所述第二补偿灰阶值，通过线性差值计算所述第三补偿灰阶值。
  9. 如权利要求1所述的显示电压补偿方法，还包括：
    在所述根据在前灰阶值和所述在后灰阶值，从反转补偿表中获取补偿灰阶之前，接收极性控制信号，并响应所述极性控制信号以进入极性反转补偿模式。
  10. 一种显示电压补偿装置，包括：
    极性反转模块，用于针对任一像素的极性反转信号进行反转操作；
    补偿灰阶获取模块，用于获取所述任一像素的在前灰阶值和在后灰阶值，其中，所述极性反转信号用于控制所述任一像素的像素电压的极性，所述在前灰阶值为所述反转操作的在前帧中所述任一像素的灰阶值，所述在后灰阶值为所述反转操作的在后帧中所述任一像素的灰阶值，并根据所述在前灰阶值和所述在后灰阶值，从反转补偿表中获取补偿灰阶值，其中，所述反转补偿表包括所述在前灰阶值、所述在后灰阶值和所述补偿灰阶值之间的映射关系；
    补偿模块，配置为和所述补偿灰阶获取模块连接，用于在显示所述反转操作的在后帧时，根据所述补偿灰阶值，对所述任一像素的像素电压进行补偿。
  11. 如权利要求10所述的显示电压补偿装置，还包括：
    存储模块，配置为和所述补偿灰阶获取模块连接，用于存储所述反转补偿表。
  12. 如权利要求10所述的显示电压补偿装置，还包括：
    控制模块，配置为和所述补偿灰阶获取模块连接，用于接收极性控制信号，并响 应所述极性控制信号以控制所述补偿灰阶获取模块获取所述补偿灰阶值。
  13. 一种显示装置，包括如权利要求10-12之一所述的显示电压补偿装置。
  14. 一种显示设备，包括：
    存储器，配置为存储指令；
    至少一个处理器：
    所述至少一个处理器执行存储在存储器中的指令，以实现根据权利要求1～9之一所述的方法。
PCT/CN2019/122684 2019-01-08 2019-12-03 显示电压补偿方法及装置、显示装置和显示设备 WO2020143365A1 (zh)

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