WO2022120944A1 - 伽玛电压校正方法、伽玛电压校正装置及显示装置 - Google Patents

伽玛电压校正方法、伽玛电压校正装置及显示装置 Download PDF

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Publication number
WO2022120944A1
WO2022120944A1 PCT/CN2020/138328 CN2020138328W WO2022120944A1 WO 2022120944 A1 WO2022120944 A1 WO 2022120944A1 CN 2020138328 W CN2020138328 W CN 2020138328W WO 2022120944 A1 WO2022120944 A1 WO 2022120944A1
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Prior art keywords
duration
gamma voltage
frame period
vertical blanking
phase
Prior art date
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Ceased
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PCT/CN2020/138328
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English (en)
French (fr)
Inventor
廖文武
赵斌
周明忠
张裕桦
曹丹
应见见
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US17/260,239 priority Critical patent/US20220406239A1/en
Publication of WO2022120944A1 publication Critical patent/WO2022120944A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • 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
    • G09G2320/02—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
    • 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
    • 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0435—Change or adaptation of the frame rate of the video stream

Definitions

  • the present application relates to the field of display technology, and in particular, to a gamma voltage correction method, a gamma voltage correction device, and a display device.
  • the principle of the display device Freesync variable refresh rate technology is to dynamically adjust the refresh rate of the display device by changing the duration of the field blanking phase of the data enable signal carried by the image data, so that the refresh rate of the display device matches the refresh rate of the graphics card.
  • the refresh rate of the display device is lowered, the duration of the vertical blanking phase will be lengthened, causing the display device to have serious leakage and sudden drop in brightness. The leakage of the device is reduced, and the brightness suddenly increases, which is dazzling.
  • the display device cannot quickly change the gamma correction voltage corresponding to the real-time frequency in real time according to the sudden change of the frequency, so the display device is prone to a sudden drop in brightness when the frequency becomes lower, and a sudden increase in brightness when the frequency becomes higher. phenomenon, that is, the display device has the problem that the brightness difference changes greatly when the frequency changes, and the flicker phenomenon occurs.
  • the present application provides a gamma voltage correction method, a gamma voltage correction device and a display device.
  • the present application provides a gamma voltage correction method for use in a variable frequency mode of a display device, the gamma voltage correction method comprising the following steps:
  • S1 Pre-store a plurality of frequencies of image data displayed by the display device and a vertical blanking duration and a gamma voltage curve corresponding to each of the frequencies.
  • each frame period sequentially includes a display phase and a vertical blanking phase.
  • step S2 specifically includes:
  • the current duration of the vertical blanking phase of the current frame period is detected in real time.
  • step S3 specifically includes:
  • the gamma voltage curve corresponding to the current duration of the vertical blanking phase is acquired.
  • the gamma voltage curve represents a relationship between a pixel grayscale value of image data displayed by the display device and a gamma correction voltage corresponding to the pixel grayscale value.
  • step S4 specifically includes:
  • the last said vertical blanking duration reached by the current duration of the vertical blanking phase of the current frame period is determined.
  • the last determined gamma voltage curve of the current frame period is obtained.
  • gamma correction is performed on the pixel grayscale reference voltage corresponding to each of the gamma correction voltages in the display stage of the next frame period, so as to obtain each pixel The gray-scale voltage of the pixel corresponding to the gray-scale reference voltage.
  • the present application provides a gamma voltage correction device for use in a variable frequency mode of a display device, the gamma voltage correction device comprising:
  • a pre-storage module configured to pre-store a plurality of frequencies of the image data displayed by the display device and the vertical blanking duration and gamma voltage curve corresponding to each of the frequencies.
  • the vertical blanking duration determination module is configured to acquire, in the current frame period, the current duration of the vertical blanking phase of the current frame period in real time; wherein each frame period sequentially includes a display phase and a vertical blanking phase.
  • the gamma voltage curve generation module is configured to acquire the frequency corresponding to the current duration of the field blanking phase once every time the current duration of the field blanking phase reaches one of the field blanking periods, and obtain all the frequencies corresponding to the current duration of the field blanking phase.
  • the gamma voltage curve corresponding to the above frequency is configured to acquire the frequency corresponding to the current duration of the field blanking phase once every time the current duration of the field blanking phase reaches one of the field blanking periods, and obtain all the frequencies corresponding to the current duration of the field blanking phase.
  • a pixel grayscale voltage generation module configured to perform gamma voltage correction on the image data in the display stage of the next frame period based on the gamma voltage curve determined last time in the current frame period.
  • the vertical blanking duration determination module includes:
  • the vertical blanking duration detection unit is used to detect the current duration of the vertical blanking phase of the current frame period in real time starting from the end time of the display phase of the current frame period.
  • a vertical blanking duration determination unit configured to determine the interval duration between the current duration of the vertical blanking phase of the current frame period and the end moment of the display phase of the current frame period, and use the interval duration as the The current duration of the field blanking phase.
  • the gamma voltage curve generation module includes:
  • a frequency determination unit configured to obtain the vertical blanking according to the frequency corresponding to the pre-stored vertical blanking duration whenever the current duration of the vertical blanking phase reaches a pre-stored vertical blanking duration The frequency corresponding to the current duration of the hidden phase.
  • a gamma voltage curve generating unit configured to obtain the frequency corresponding to the current duration of the field blanking phase based on the pre-stored gamma voltage curve corresponding to the frequency and the frequency corresponding to the current duration of the field blanking phase Gamma voltage curve.
  • the gamma voltage curve represents a relationship between a pixel grayscale value of image data displayed by the display device and a gamma correction voltage corresponding to the pixel grayscale value.
  • the pixel grayscale voltage generation module includes:
  • a vertical blanking duration final determination unit configured to determine the last vertical blanking duration reached by the current duration of the vertical blanking phase of the current frame period before the start time of the display phase of the next frame period .
  • a frequency final determination unit configured to obtain the last vertical blanking duration reached by the current duration of the vertical blanking phase of the current frame period based on the pre-stored frequency corresponding to the vertical blanking duration The last frequency corresponding to the current duration of the vertical blanking phase of the current frame period.
  • Gamma voltage curve final generating unit configured to obtain the current frame period according to the pre-stored gamma voltage curve corresponding to the frequency, and based on the frequency last corresponding to the current duration of the field blanking phase of the current frame period The last determined gamma voltage curve.
  • a gamma voltage correction unit configured to use each of the gamma correction voltages to perform gamma correction on the pixel grayscale reference voltage corresponding to each of the gamma correction voltages in the display stage of the next frame period , to obtain the pixel gray-scale voltage corresponding to each of the pixel gray-scale reference voltages.
  • the present application further provides a display device, the display device includes a timing controller, a gamma voltage correction device, a source driver, a gate driver and a display panel, the timing controller is respectively connected with the gate A driver is connected to the gamma voltage correction device, the gamma voltage correction device is connected to the source driver, and the gate driver and the source driver are respectively connected to the display panel.
  • the display device operates in a stable frequency mode or a variable frequency mode, and the gamma voltage correction device is used in the variable frequency mode of the display device.
  • the gamma voltage correction device includes:
  • a pre-storage module for pre-storing a plurality of frequencies of the image data displayed by the display device and a vertical blanking duration and a gamma voltage curve corresponding to each of the frequencies
  • each frame period sequentially includes a display phase and a vertical blanking phase
  • the gamma voltage curve generation module is configured to acquire the frequency corresponding to the current duration of the field blanking phase once every time the current duration of the field blanking phase reaches one of the field blanking periods, and obtain all the frequencies corresponding to the current duration of the field blanking phase.
  • a pixel grayscale voltage generation module configured to perform gamma voltage correction on the image data in the display stage of the next frame period based on the gamma voltage curve determined last time in the current frame period.
  • the vertical blanking duration determination module includes:
  • the field blanking duration detection unit is used to detect the current duration of the field blanking phase of the current frame period in real time from the end moment of the display phase of the current frame period;
  • a vertical blanking duration determination unit configured to determine the interval duration between the current duration of the vertical blanking phase of the current frame period and the end moment of the display phase of the current frame period, and use the interval duration as the The current duration of the field blanking phase.
  • the gamma voltage curve generation module includes:
  • a frequency determination unit configured to obtain the vertical blanking according to the frequency corresponding to the pre-stored vertical blanking duration whenever the current duration of the vertical blanking phase reaches a pre-stored vertical blanking duration the frequency corresponding to the current duration of the hidden phase;
  • a gamma voltage curve generating unit configured to obtain the frequency corresponding to the current duration of the field blanking phase based on the pre-stored gamma voltage curve corresponding to the frequency and the frequency corresponding to the current duration of the field blanking phase Gamma voltage curve.
  • the gamma voltage curve represents a relationship between a pixel grayscale value of image data displayed by the display device and a gamma correction voltage corresponding to the pixel grayscale value.
  • the pixel grayscale voltage generation module includes:
  • a vertical blanking duration final determination unit configured to determine the last vertical blanking duration reached by the current duration of the vertical blanking phase of the current frame period before the start time of the display phase of the next frame period ;
  • a frequency final determination unit configured to obtain the last vertical blanking duration reached by the current duration of the vertical blanking phase of the current frame period based on the pre-stored frequency corresponding to the vertical blanking duration The last frequency corresponding to the current duration of the vertical blanking phase of the current frame period;
  • Gamma voltage curve final generating unit configured to obtain the current frame period according to the pre-stored gamma voltage curve corresponding to the frequency, and based on the frequency last corresponding to the current duration of the field blanking phase of the current frame period The last determined gamma voltage curve;
  • a gamma voltage correction unit configured to use each of the gamma correction voltages to perform gamma correction on the pixel grayscale reference voltage corresponding to each of the gamma correction voltages in the display stage of the next frame period , to obtain the pixel gray-scale voltage corresponding to each of the pixel gray-scale reference voltages.
  • the present application provides a gamma voltage correction method, a gamma voltage correction device and a display device.
  • the method includes: pre-stored multiple frequencies of image data displayed by the display device and the vertical blanking duration and gamma voltage corresponding to each frequency In the current frame period, the frequency of the image data displayed by the display device can be acquired in real time according to the current duration of the field blanking phase of the current frame period, and then the required gamma voltage curve can be acquired according to the frequency.
  • the last determined gamma voltage curve in the current frame period is applied to the next frame period, and in the display stage of the next frame period, gamma voltage correction is performed based on the last determined gamma voltage curve in the current frame period, so that the The gamma voltage curve can follow the change of the frequency, that is, the frequency of the display device and the gamma voltage curve can be kept consistent, so as to reduce the problem of the large difference in brightness caused by the frequency change of the display device, thereby preventing the display device from occurring. flickering phenomenon.
  • FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a gamma voltage calibration method provided by an embodiment of the present application.
  • FIG. 3( a ) is a first timing diagram of the gamma voltage correction method provided by the embodiment of the present application.
  • FIG. 3( b ) is a second timing diagram of the gamma voltage correction method provided by the embodiment of the present application.
  • FIG. 4( a ) is a schematic diagram of a first gamma curve of the gamma voltage correction method provided by the embodiment of the present application.
  • FIG. 4( b ) is a schematic diagram of a second gamma curve of the gamma voltage correction method provided by the embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a gamma voltage correction device provided by an embodiment of the present application.
  • the display device includes a timing controller 110 , a gamma voltage correction device 120 , a source driver 130 , a gate driver 140 and a display panel 150 .
  • the timing controller 110 receives external image data and parses out a data enable signal according to the image data.
  • the data enable signal includes a display phase and a vertical blanking phase in sequence in one frame of image.
  • the gamma voltage correction device 120 is configured to obtain a corresponding gamma voltage curve according to the duration of the field blanking phase of the data enable signal to perform gamma voltage correction on the image data signal, and then pass the source electrode during the display phase of the data enable signal.
  • the driver 130 outputs the corrected image data signal to be applied to the pixels of the display panel 150 , so that the display panel 150 is normally displayed.
  • FIG. 2 is a schematic flowchart of a gamma voltage correction method provided by an embodiment of the present application.
  • an embodiment of the present application provides a gamma voltage correction method, which is used in a variable frequency mode of a display device.
  • the voltage correction method includes the following steps:
  • the duration of the vertical blanking phase of the data enable signal is related to the frequency of the image data, and when the frequency changes, since the brightness of the display panel will change, the gamma voltage used by the display panel for gamma voltage correction
  • the gamma voltage curve actually needs to be changed, that is, different frequencies correspond to different gamma voltage curves.
  • This embodiment of the present application pre-stores multiple frequencies and a vertical blanking duration and a gamma voltage curve corresponding to each frequency, that is, multiple frequencies are pre-stored, and multiple vertical blanking durations corresponding to multiple frequencies are stored in advance. , and multiple gamma voltage curves corresponding to multiple frequencies respectively.
  • the number of pre-stored frequencies can be set according to the actual situation.
  • each frame period sequentially includes a display phase and a vertical blanking phase.
  • each frame period is successively performed according to the display phase and the vertical blanking phase, and the start time of the display phase of the next frame is followed by the end time of the vertical blanking phase of the previous frame.
  • the frequency changes starting from the end time of the display phase of the current frame period, the current duration of the vertical blanking phase of the current frame period is acquired in real time in the current frame period.
  • the current duration of the vertical blanking phase is obtained according to the frequency corresponding to the vertical blanking duration and, according to the pre-stored gamma voltage curve corresponding to the frequency, obtain the gamma voltage curve corresponding to the current duration of the field blanking phase, that is, the gamma voltage required for the display panel to perform gamma voltage correction at this time. Marathon voltage curve.
  • the gamma voltage correction method pre-stores multiple frequencies of the image data displayed by the display device and the vertical blanking duration and the gamma voltage curve corresponding to each frequency, and can be used in the current frame period according to the current
  • the current duration of the vertical blanking phase of the frame period, the frequency of the image data displayed by the display device is acquired in real time, and then the required gamma voltage curve is acquired according to the frequency.
  • the curve is applied to the next frame period, and in the display stage of the next frame period, gamma voltage correction is performed based on the gamma voltage curve determined last time in the current frame period, so that the gamma voltage curve of the display device can follow the change of frequency. , that is, the frequency and the gamma voltage curve of the display device can be kept consistent, so as to reduce the problem that the display device causes a large difference in brightness due to the frequency change, thereby preventing the display device from flickering.
  • FIG. 3( a ) is a schematic diagram of the first time sequence of the gamma voltage correction method provided by the embodiment of the present application, which is a schematic diagram of determining the gamma voltage curve when the frequency becomes lower
  • FIG. 3( b ) is provided by the embodiment of the present application
  • a second timing diagram of the gamma voltage correction method which is a schematic diagram of determining the gamma voltage curve when the frequency increases.
  • the determination moment of the gamma voltage curves in Fig. 3(a) and Fig. 3(b) is the determination moment of the current duration of the field blanking phase.
  • step S2 specifically includes:
  • S22 Determine the interval duration between the current duration of the vertical blanking phase of the current frame period and the end moment of the display phase of the current frame period, and use the interval duration as the current duration of the vertical blanking phase.
  • step S3 specifically includes:
  • the current duration of the vertical blanking phase reaches a pre-stored vertical blanking duration (in FIG. 3(a) and FIG. 3(b)
  • the current duration of the vertical blanking phase reaches a pre-stored vertical blanking duration for the second time
  • the frequency corresponding to the current duration of the vertical blanking phase is obtained according to the frequency corresponding to the pre-stored vertical blanking duration.
  • the gamma voltage curve represents the relationship between the pixel grayscale value of the image data displayed by the display device and the gamma correction voltage corresponding to the pixel grayscale value.
  • step S4 specifically includes:
  • step S4 determines the real-time frequency finally reached in the current frame period according to the frequency corresponding to the vertical blanking duration finally reached in the vertical blanking phase of the current frame period, and uses the gamma voltage curve corresponding to the frequency as the final gamma
  • the voltage-corrected gamma voltage curve that is, in the next frame period, the gamma voltage curve determined for the last time in the previous frame period is used to perform gamma voltage correction on the gray-scale reference voltages of multiple pixels included in the image data, and obtain each pixel.
  • the pixel grayscale voltage corresponding to the grayscale reference voltage is used to perform gamma voltage correction on the gray-scale reference voltages of multiple pixels included in the image data, and obtain each pixel.
  • the gamma voltage curve determined last time in the previous frame period is used for each pixel grayscale.
  • the reference voltage is corrected by gamma voltage, so as to obtain the pixel grayscale voltage corresponding to the grayscale reference voltage of each pixel, so as to use each pixel grayscale voltage to drive the corresponding grayscale, and display image data through the pixels of the display panel.
  • Figure 3(a) is a schematic diagram of the gamma voltage adjustment when the frequency becomes lower.
  • the vertical blanking duration becomes longer, and as the frequency becomes lower and lower, the vertical blanking duration becomes longer.
  • the degree of length is also deepening, so as the frequency becomes lower and lower, the interval at which the gamma voltage curve is obtained becomes larger and larger.
  • Figure 3(b) is a schematic diagram of the gamma voltage adjustment when the frequency increases.
  • the field blanking duration becomes shorter, and as the frequency becomes higher, the vertical blanking duration becomes shorter. Therefore, as the frequency becomes higher and higher, the interval at which the gamma voltage curve is obtained becomes smaller and smaller.
  • FIG. 4( a ) is a schematic diagram of the first gamma curve of the gamma voltage correction method provided by the embodiment of the present application.
  • FIG. 4(b) is a schematic diagram of the second gamma curve of the gamma voltage correction method provided by the embodiment of the present application.
  • FIG. 4(b) the gamma voltage curve from the stable frequency mode to the variable frequency mode is corresponding to FIG. 3 (b) The gamma voltage curve when the frequency increases, wherein the dotted line is the gamma voltage curve when the frequency increases before the gamma voltage correction method is used, and the solid line is the frequency increases after the gamma voltage correction method is used.
  • gamma voltage curve It can be seen from Figure 4(b) that when the frequency becomes higher, the gamma voltage correction method can reduce the gamma voltage value of the gamma voltage curve and reduce the brightness difference when switching from low frequency to high frequency.
  • FIG. 5 is a schematic structural diagram of a gamma voltage correction device provided by an embodiment of the present application. As shown in FIG. 5 , an embodiment of the present application provides a gamma voltage correction device, which is used in a variable frequency mode of a display device.
  • the voltage correction device includes:
  • the pre-storage module 501 is configured to pre-store a plurality of frequencies of image data displayed by the display device and the vertical blanking duration and gamma voltage curve corresponding to each frequency.
  • the vertical blanking duration determination module 502 is configured to obtain, in the current frame period, the current duration of the vertical blanking phase of the current frame period in real time; wherein each frame period sequentially includes a display phase and a vertical blanking phase.
  • the gamma voltage curve generation module 503 is configured to acquire the frequency corresponding to the current duration of the field blanking phase and acquire the gamma voltage curve corresponding to the frequency whenever the current duration of the field blanking phase reaches a field blanking duration .
  • the pixel grayscale voltage generation module 504 is configured to perform gamma voltage correction on the image data in the display stage of the next frame period based on the gamma voltage curve determined last time in the current frame period.
  • the gamma voltage correction device pre-stores multiple frequencies of the image data displayed by the display device and the vertical blanking duration and gamma voltage curve corresponding to each frequency, and can The current duration of the vertical blanking phase of the frame period, the frequency of the image data displayed by the display device is acquired in real time, and then the required gamma voltage curve is acquired according to the frequency. The curve is applied to the next frame period, and in the display stage of the next frame period, gamma voltage correction is performed based on the gamma voltage curve determined last time in the current frame period, so that the gamma voltage curve of the display device can follow the change of frequency. , that is, the frequency and the gamma voltage curve of the display device can be kept consistent, so as to reduce the problem that the display device causes a large difference in brightness due to the frequency change, thereby preventing the display device from flickering.
  • the vertical blanking duration determination module 502 includes:
  • the vertical blanking duration detection unit is used to detect the current duration of the vertical blanking phase of the current frame period in real time starting from the end time of the display phase of the current frame period.
  • the vertical blanking duration determination unit is used to determine the interval duration between the current duration of the vertical blanking phase of the current frame period and the end moment of the display phase of the current frame period, and use the interval duration as the current duration of the vertical blanking phase .
  • the gamma voltage curve generation module 503 includes:
  • the frequency determination unit is used to obtain the frequency corresponding to the current duration of the vertical blanking phase according to the frequency corresponding to the pre-stored vertical blanking duration whenever the current duration of the vertical blanking phase reaches a pre-stored vertical blanking duration .
  • the gamma voltage curve generating unit is configured to obtain the gamma voltage curve corresponding to the current duration of the field blanking phase based on the pre-stored gamma voltage curve corresponding to the frequency and the frequency corresponding to the current duration of the field blanking phase.
  • the gamma voltage curve represents a relationship between pixel grayscale values of image data displayed by the display device and gamma correction voltages corresponding to the pixel grayscale values.
  • the pixel grayscale voltage generation module 504 includes:
  • the vertical blanking duration final determination unit is used for determining the last vertical blanking duration reached by the current duration of the vertical blanking phase of the current frame period before the start time of the display phase of the next frame period.
  • the frequency final determination unit is used to obtain the vertical blanking phase of the current frame period based on the frequency corresponding to the pre-stored vertical blanking period and the last vertical blanking period reached by the current duration of the vertical blanking period of the current frame period The frequency that last corresponds to the current duration of .
  • the final generation unit of the gamma voltage curve is used to obtain the last determined gamma of the current frame period based on the frequency corresponding to the current duration of the field blanking phase of the current frame period according to the gamma voltage curve corresponding to the pre-stored frequency voltage curve.
  • the gamma voltage correction unit is configured to use each gamma correction voltage to perform gamma correction on the pixel grayscale reference voltage corresponding to each gamma correction voltage in the display stage of the next frame period, so as to obtain each pixel grayscale reference The pixel grayscale voltage corresponding to the voltage.

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  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

一种伽玛电压校正方法、伽玛电压校正装置及显示装置，能在下一帧周期的显示阶段基于当前帧周期中最后一次确定的伽玛电压曲线进行伽玛电压校正，从而使得显示装置的伽玛电压曲线能跟随频率的变化而变化，即频率和伽玛电压曲线保持一致，以减小显示装置因频率变化而导致亮度差异较大的问题，由此防止发生闪烁现象。

Description

伽玛电压校正方法、伽玛电压校正装置及显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种伽玛电压校正方法、伽玛电压校正装置及显示装置。
 背景技术
显示装置Freesync可变刷新率技术的原理是通过改变图像数据携带的数据使能信号的场消隐阶段的时长来动态调节显示装置的刷新率，使显示装置的刷新率与显卡的刷新率匹配。但是，由于显示装置的刷新率降低时，场消隐阶段的时长会加长，使得显示装置产生较严重的漏电，亮度突然下降，而刷新率提高时，场消隐阶段的时长会缩短，使得显示装置的漏电变少，亮度突然变高，显得刺眼。
 技术问题
目前，显示装置无法根据频率的突然变化而快速地实时更改实时频率对应的伽玛校正电压，因此使得显示装置在频率变低时容易出现亮度突然下降，在频率变高时容易出现亮度突然变高的现象，即显示装置存在频率变化时亮度差变化较大的问题，发生闪烁现象。
 技术解决方案
为了解决上述问题，本申请提供一种伽玛电压校正方法、伽玛电压校正装置及显示装置。
第一方面，本申请提供一种伽玛电压校正方法，用于显示装置的可变频率模式下，所述伽玛电压校正方法包括以下步骤：
S1、预先存储所述显示装置显示的图像数据的多个频率以及每一所述频率对应的场消隐时长和伽玛电压曲线。
S2、在当前帧周期中，实时获取所述当前帧周期的场消隐阶段的当前持续时长；其中，每一帧周期依次包括显示阶段和场消隐阶段。
S3、每当所述场消隐阶段的当前持续时长达到一个所述场消隐时长，则获取一次所述场消隐阶段的当前持续时长对应的频率，并获取所述频率对应的伽玛电压曲线。
S4、基于所述当前帧周期中最后一次确定的伽玛电压曲线，在下一帧周期的显示阶段对所述图像数据进行伽玛电压校正。
在一些实施例中，步骤S2具体包括：
从当前帧周期的显示阶段结束时刻开始，实时侦测所述当前帧周期的场消隐阶段的当前持续时刻。
确定所述当前帧周期的场消隐阶段的当前持续时刻距离所述当前帧周期的显示阶段的结束时刻的间隔时长，并将所述间隔时长作为所述场消隐阶段的当前持续时长。
在一些实施例中，步骤S3具体包括：
每当所述场消隐阶段的当前持续时长达到一个预先存储的所述场消隐时长，则根据预先存储的所述场消隐时长对应的频率，获取所述场消隐阶段的当前持续时长对应的频率。
基于预先存储的所述频率对应的伽玛电压曲线，所述场消隐阶段的当前持续时长对应的频率，获取所述场消隐阶段的当前持续时长对应的伽玛电压曲线。
在一些实施例中，所述伽玛电压曲线表示所述显示装置显示的图像数据的像素灰阶值与所述像素灰阶值对应的伽玛校正电压之间的关系。
在一些实施例中，步骤S4具体包括：
在所述下一帧周期的显示阶段的开始时刻之前，确定所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长。
基于预先存储的所述场消隐时长对应的频率，根据所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长，获取所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率。
根据预先存储的所述频率对应的伽玛电压曲线，基于所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率，获取所述当前帧周期最后一次确定的伽玛电压曲线。
基于所述当前帧周期中最后一次确定的伽玛电压曲线，根据所述图像数据包括的多个像素灰阶参考电压，确定最后一次确定的所述伽玛校正曲线包括的对应于每个所述像素灰阶参考电压的伽玛校正电压。
利用每个所述伽玛校正电压，在所述下一帧周期的显示阶段对每个所述伽玛校正电压对应的所述像素灰阶参考电压进行伽玛校正，以获取每个所述像素灰阶参考电压对应的所述像素灰阶电压。
第二方面，本申请提供一种伽玛电压校正装置，用于显示装置的可变频率模式下，所述伽玛电压校正装置包括：
预先存储模块，用于预先存储所述显示装置显示的图像数据的多个频率以及每一所述频率对应的场消隐时长和伽玛电压曲线。
场消隐持续时长确定模块，用于在当前帧周期中，实时获取所述当前帧周期的场消隐阶段的当前持续时长；其中，每一帧周期依次包括显示阶段和场消隐阶段。
伽玛电压曲线生成模块，用于每当所述场消隐阶段的当前持续时长达到一个所述场消隐时长，则获取一次所述场消隐阶段的当前持续时长对应的频率，并获取所述频率对应的伽玛电压曲线。
像素灰阶电压生成模块，用于基于所述当前帧周期中最后一次确定的伽玛电压曲线，在下一帧周期的显示阶段对所述图像数据进行伽玛电压校正。
在一些实施例中，所述场消隐持续时长确定模块包括：
场消隐持续时长侦测单元，用于从当前帧周期的显示阶段结束时刻开始，实时侦测所述当前帧周期的场消隐阶段的当前持续时刻。
场消隐持续时长确定单元，用于确定所述当前帧周期的场消隐阶段的当前持续时刻距离所述当前帧周期的显示阶段的结束时刻的间隔时长，并将所述间隔时长作为所述场消隐阶段的当前持续时长。
在一些实施例中，所述伽玛电压曲线生成模块包括：
频率确定单元，用于每当所述场消隐阶段的当前持续时长达到一个预先存储的所述场消隐时长，则根据预先存储的所述场消隐时长对应的频率，获取所述场消隐阶段的当前持续时长对应的频率。
伽玛电压曲线生成单元，用于基于预先存储的所述频率对应的伽玛电压曲线，所述场消隐阶段的当前持续时长对应的频率，获取所述场消隐阶段的当前持续时长对应的伽玛电压曲线。
在一些实施例中，所述伽玛电压曲线表示所述显示装置显示的图像数据的像素灰阶值与所述像素灰阶值对应的伽玛校正电压之间的关系。
在一些实施例中，所述像素灰阶电压生成模块包括：
场消隐时长最终确定单元，用于在所述下一帧周期的显示阶段的开始时刻之前，确定所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长。
频率最终确定单元，用于基于预先存储的所述场消隐时长对应的频率，根据所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长，获取所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率。
伽玛电压曲线最终生成单元，用于根据预先存储的所述频率对应的伽玛电压曲线，基于所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率，获取所述当前帧周期最后一次确定的伽玛电压曲线。
伽玛电压校正单元，用于利用每个所述伽玛校正电压，在所述下一帧周期的显示阶段对每个所述伽玛校正电压对应的所述像素灰阶参考电压进行伽玛校正，以获取每个所述像素灰阶参考电压对应的所述像素灰阶电压。
第三方面，本申请还提供一种显示装置，所述显示装置包括时序控制器、伽玛电压校正装置、源极驱动器、栅极驱动器和显示面板，所述时序控制器分别与所述栅极驱动器和所述伽玛电压校正装置连接，所述伽玛电压校正装置与所述源极驱动器连接，所述栅极驱动器和所述源极驱动器分别与所述显示面板连接。
在一些实施例中，所述显示装置工作于稳定频率模式或可变频率模式，所述伽玛电压校正装置用于所述显示装置的可变频率模式下。
在一些实施例中，所述伽玛电压校正装置包括：
预先存储模块，用于预先存储所述显示装置显示的图像数据的多个频率以及每一所述频率对应的场消隐时长和伽玛电压曲线；
场消隐持续时长确定模块，用于在当前帧周期中，实时获取所述当前帧周期的场消隐阶段的当前持续时长；其中，每一帧周期依次包括显示阶段和场消隐阶段；
伽玛电压曲线生成模块，用于每当所述场消隐阶段的当前持续时长达到一个所述场消隐时长，则获取一次所述场消隐阶段的当前持续时长对应的频率，并获取所述频率对应的伽玛电压曲线；
像素灰阶电压生成模块，用于基于所述当前帧周期中最后一次确定的伽玛电压曲线，在下一帧周期的显示阶段对所述图像数据进行伽玛电压校正。
在一些实施例中，所述场消隐持续时长确定模块包括：
场消隐持续时长侦测单元，用于从当前帧周期的显示阶段结束时刻开始，实时侦测所述当前帧周期的场消隐阶段的当前持续时刻；
场消隐持续时长确定单元，用于确定所述当前帧周期的场消隐阶段的当前持续时刻距离所述当前帧周期的显示阶段的结束时刻的间隔时长，并将所述间隔时长作为所述场消隐阶段的当前持续时长。
在一些实施例中，所述伽玛电压曲线生成模块包括：
频率确定单元，用于每当所述场消隐阶段的当前持续时长达到一个预先存储的所述场消隐时长，则根据预先存储的所述场消隐时长对应的频率，获取所述场消隐阶段的当前持续时长对应的频率；
伽玛电压曲线生成单元，用于基于预先存储的所述频率对应的伽玛电压曲线，所述场消隐阶段的当前持续时长对应的频率，获取所述场消隐阶段的当前持续时长对应的伽玛电压曲线。
在一些实施例中，所述伽玛电压曲线表示所述显示装置显示的图像数据的像素灰阶值与所述像素灰阶值对应的伽玛校正电压之间的关系。
在一些实施例中，所述像素灰阶电压生成模块包括：
场消隐时长最终确定单元，用于在所述下一帧周期的显示阶段的开始时刻之前，确定所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长；
频率最终确定单元，用于基于预先存储的所述场消隐时长对应的频率，根据所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长，获取所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率；
伽玛电压曲线最终生成单元，用于根据预先存储的所述频率对应的伽玛电压曲线，基于所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率，获取所述当前帧周期最后一次确定的伽玛电压曲线；
伽玛电压校正单元，用于利用每个所述伽玛校正电压，在所述下一帧周期的显示阶段对每个所述伽玛校正电压对应的所述像素灰阶参考电压进行伽玛校正，以获取每个所述像素灰阶参考电压对应的所述像素灰阶电压。
 有益效果
本申请提供一种伽玛电压校正方法、伽玛电压校正装置及显示装置，方法包括：预先存储了显示装置显示的图像数据的多个频率与每一频率对应的场消隐时长和伽玛电压曲线，并能在当前帧周期中根据当前帧周期的场消隐阶段的当前持续时长，实时获取显示装置显示的图像数据的频率，再根据频率获取所需的伽玛电压曲线，由此，将当前帧周期中最后一次确定的伽玛电压曲线应用于下一帧周期，在下一帧周期的显示阶段基于当前帧周期中最后一次确定的伽玛电压曲线进行伽玛电压校正，从而使得显示装置的伽玛电压曲线能跟随频率的变化而变化，即使得显示装置的频率和伽玛电压曲线能保持一致，以减小显示装置因频率变化而导致亮度差异较大的问题，由此防止显示装置发生闪烁现象。
 附图说明
图1为本申请实施例提供的显示装置的结构示意图。
图2为本申请实施例提供的伽玛电压校正方法的流程示意图。
图3（a）为本申请实施例提供的伽玛电压校正方法的第一种时序示意图。
图3（b）为本申请实施例提供的伽玛电压校正方法的第二种时序示意图。
图4（a）为本申请实施例提供的伽玛电压校正方法的第一种伽玛曲线示意图。
图4（b）为本申请实施例提供的伽玛电压校正方法的第二种伽玛曲线示意图。
图5为本申请实施例提供的伽玛电压校正装置的结构示意图。
 本发明的实施方式
为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
图1为本申请实施例提供的显示装置的结构示意图，如图1所示，显示装置包括时序控制器110、伽玛电压校正装置120、源极驱动器130、栅极驱动器140和显示面板150，该伽玛电压校正方法的工作过程中，时序控制器110接收外部的图像数据并根据图像数据解析出数据使能信号等，数据使能信号在一帧图像依次包括显示阶段和场消隐阶段，伽玛电压校正装置120用于根据数据使能信号的场消隐阶段的时长获取对应的伽玛电压曲线来对图像数据信号进行伽玛电压校正后，在数据使能信号的显示阶段通过源极驱动器130输出校正后的图像数据信号施加到显示面板150的像素中，从而使得显示面板150正常显示。
图2为本申请实施例提供的伽玛电压校正方法的流程示意图，结合图2所示，本申请实施例提供一种伽玛电压校正方法，用于显示装置的可变频率模式下，伽玛电压校正方法包括以下步骤：
S1、预先存储显示装置显示的图像数据的多个频率以及每一频率对应的场消隐时长和伽玛电压曲线。
具体地，数据使能信号的场消隐阶段的时长与图像数据的频率有关，并且，当频率发生改变时，由于显示面板的亮度会发生改变，因此显示面板进行伽玛电压校正所采用的伽玛电压曲线实际也需要进行改变，即不同的频率对应于不同的伽玛电压曲线。本申请实施例预先存储多个频率以及每一频率分别对应的一个场消隐时长和一条伽玛电压曲线，也即，预先存储了多个频率，多个频率分别对应的多个场消隐时长，以及多个频率分别对应的多条伽玛电压曲线。
需要说明的是，预先存储的频率的个数可以根据实际情况自行设置，预先设置的频率的个数越多，则由于每个频率均分别对应一个场消隐时长和伽玛电压曲线，因此需要预先存储的场消隐时长和伽玛电压曲线也越多，这代表后续能够将场消隐阶段的当前持续时长进行比对的场消隐时长的个数更多，则能够选择的频率对应的伽玛电压曲线也越多，即代表该伽玛电压校正方法的精度越高。
S2、在当前帧周期中，实时获取当前帧周期的场消隐阶段的当前持续时长；其中，每一帧周期依次包括显示阶段和场消隐阶段。
具体地，每一帧周期依次按照显示阶段和场消隐阶段连续进行，下一帧的显示阶段的开始时刻接着上一帧的场消隐阶段的结束时刻。当频率发生变化时，从当前帧周期的显示阶段的结束时刻开始，在当前帧周期中实时获取当前帧周期的场消隐阶段的当前持续时长。
S3、每当场消隐阶段的当前持续时长达到一个场消隐时长，则获取一次场消隐阶段的当前持续时长对应的频率，并获取频率对应的伽玛电压曲线。
具体地，根据预先存储的多个场消隐时长，每当场消隐阶段的当前持续时长达到一个场消隐时长，则根据该场消隐时长对应的频率，获取场消隐阶段的当前持续时长对应的频率；并且，根据预先存储的该频率对应的伽玛电压曲线，获取场消隐阶段的当前持续时长对应的伽玛电压曲线，即此时显示面板进行伽玛电压校正所需采用的伽玛电压曲线。
S4、基于当前帧周期中最后一次确定的伽玛电压曲线，在下一帧周期的显示阶段对图像数据进行伽玛电压校正。
具体地，在下一帧周期的显示阶段的开始时刻之前，确定当前帧周期中最后一次确定的伽玛电压曲线，并利用最后一次确定的伽玛电压曲线在下一帧周期的显示阶段对图像数据进行伽玛电压校正。
本申请实施例提供的伽玛电压校正方法，预先存储了显示装置显示的图像数据的多个频率与每一频率对应的场消隐时长和伽玛电压曲线，并能在当前帧周期中根据当前帧周期的场消隐阶段的当前持续时长，实时获取显示装置显示的图像数据的频率，再根据频率获取所需的伽玛电压曲线，由此，将当前帧周期中最后一次确定的伽玛电压曲线应用于下一帧周期，在下一帧周期的显示阶段基于当前帧周期中最后一次确定的伽玛电压曲线进行伽玛电压校正，从而使得显示装置的伽玛电压曲线能跟随频率的变化而变化，即使得显示装置的频率和伽玛电压曲线能保持一致，以减小显示装置因频率变化而导致亮度差异较大的问题，由此防止显示装置发生闪烁现象。
图3（a）为本申请实施例提供的伽玛电压校正方法的第一种时序示意图，此为频率变低时的伽玛电压曲线确定示意图，图3（b）为本申请实施例提供的伽玛电压校正方法的第二种时序示意图，此为频率变高时的伽玛电压曲线确定示意图。其中，图3（a）和图3（b）中的伽玛电压曲线确定时刻即为场消隐阶段的当前持续时长的确定时刻。
如图3（a）或图3（b）所示，步骤S2具体包括：
S21、从当前帧周期的显示阶段结束时刻开始，实时侦测当前帧周期的场消隐阶段的当前持续时刻。
S22、确定当前帧周期的场消隐阶段的当前持续时刻距离当前帧周期的显示阶段的结束时刻的间隔时长，并将间隔时长作为场消隐阶段的当前持续时长。
如图3（a）或图3（b）所示，步骤S3具体包括：
S31、每当场消隐阶段的当前持续时长达到一个预先存储的场消隐时长（图3（a）和图3（b）中以场消隐阶段的当前持续时长第二次达到一个预先存储的场消隐时长为例），则根据预先存储的场消隐时长对应的频率，获取场消隐阶段的当前持续时长对应的频率。
S32、基于预先存储的频率对应的伽玛电压曲线，场消隐阶段的当前持续时长对应的频率，获取场消隐阶段的当前持续时长对应的伽玛电压曲线。
需要说明的是，伽玛电压曲线表示显示装置显示的图像数据的像素灰阶值与像素灰阶值对应的伽玛校正电压之间的关系。
如图3（a）或图3（b）所示，步骤S4具体包括：
S41、在下一帧周期的显示阶段的开始时刻之前，确定当前帧周期的场消隐阶段的当前持续时长达到的最后一个场消隐时长。
S42、基于预先存储的场消隐时长对应的频率，根据当前帧周期的场消隐阶段的当前持续时长达到的最后一个场消隐时长，获取当前帧周期的场消隐阶段的当前持续时长最后对应的频率。
S43、根据预先存储的频率对应的伽玛电压曲线，基于当前帧周期的场消隐阶段的当前持续时长最后对应的频率，获取当前帧周期最后一次确定的伽玛电压曲线。
S44、基于当前帧周期中最后一次确定的伽玛电压曲线，根据图像数据包括的多个像素灰阶参考电压，确定最后一次确定的伽玛校正曲线包括的对应于每个像素灰阶参考电压的伽玛校正电压。
S45、利用每个伽玛校正电压，在下一帧周期的显示阶段对每个伽玛校正电压对应的像素灰阶参考电压进行伽玛校正，以获取每个像素灰阶参考电压对应的像素灰阶电压。
具体地，步骤S4根据当前帧周期的场消隐阶段最后达到的场消隐时长对应的频率，确定当前帧周期最终达到的实时频率，并将该频率对应的伽玛电压曲线作为最后进行伽玛电压校正的伽玛电压曲线，即在下一帧周期中利用上一帧周期最后一次确定的伽玛电压曲线，对图像数据包括的多个像素灰阶参考电压进行伽玛电压校正，获取每个像素灰阶参考电压对应的像素灰阶电压，例如，图像采用256灰阶，图像数据包括256个像素灰阶参考电压，则利用上一帧周期最后一次确定的伽玛电压曲线对每个像素灰阶参考电压进行伽玛电压校正，从而获取每个像素灰阶参考电压对应的像素灰阶电压，以利用每个像素灰阶电压驱动对应的灰阶，通过显示面板的像素显示图像数据。
需要说明的是，图3（a）为频率变低时的伽玛电压调节示意图，频率变低时，场消隐时长会变长，并且，随着频率越变越低，场消隐时长变长的程度也在加深，因此随着频率越变越低，获取伽玛电压曲线的间隔时刻的区间也越来越大。图3（b）为频率变高时的伽玛电压调节示意图，频率变高时，场消隐时长会变短，并且，随着频率越变越高，场消隐时长变短的程度也在减弱，因此随着频率越变越高，获取伽玛电压曲线的间隔时刻的区间也越来越小。
需要注意的是，该伽玛电压校正方法应用于可变频率模式中。
图4（a）为本申请实施例提供的伽玛电压校正方法的第一种伽玛曲线示意图，图4（a）由稳定频率模式进入可变频率模式的伽玛电压曲线为对应于图3（a）中频率变低时的伽玛电压曲线，其中，虚线为使用该伽玛电压校正方法之前频率变低时的伽玛电压曲线，实线为使用该伽玛电压校正方法之后频率变低时的伽玛电压曲线。由图4（a）可以看出，当频率变低时，使用该伽玛电压校正方法能将伽玛电压曲线的伽玛电压值提高，减小了高频切换到低频时的亮度差。
图4（b）为本申请实施例提供的伽玛电压校正方法的第二种伽玛曲线示意图，图4（b）由稳定频率模式进入可变频率模式的伽玛电压曲线为对应于图3（b）中频率变高时的伽玛电压曲线，其中，虚线为使用该伽玛电压校正方法之前频率变高时的伽玛电压曲线，实线为使用该伽玛电压校正方法之后频率变高时的伽玛电压曲线。由图4（b）可以看出，当频率变高时，使用该伽玛电压校正方法能将伽玛电压曲线的伽玛电压值减小，减小了低频切换到高频时的亮度差。
图5为本申请实施例提供的伽玛电压校正装置的结构示意图，如图5所示，本申请实施例提供一种伽玛电压校正装置，用于显示装置的可变频率模式下，伽玛电压校正装置包括：
预先存储模块501，用于预先存储显示装置显示的图像数据的多个频率以及每一频率对应的场消隐时长和伽玛电压曲线。
场消隐持续时长确定模块502，用于在当前帧周期中，实时获取当前帧周期的场消隐阶段的当前持续时长；其中，每一帧周期依次包括显示阶段和场消隐阶段。
伽玛电压曲线生成模块503，用于每当场消隐阶段的当前持续时长达到一个场消隐时长，则获取一次场消隐阶段的当前持续时长对应的频率，并获取频率对应的伽玛电压曲线。
像素灰阶电压生成模块504，用于基于当前帧周期中最后一次确定的伽玛电压曲线，在下一帧周期的显示阶段对图像数据进行伽玛电压校正。
本申请实施例提供的伽玛电压校正装置，预先存储了显示装置显示的图像数据的多个频率与每一频率对应的场消隐时长和伽玛电压曲线，并能在当前帧周期中根据当前帧周期的场消隐阶段的当前持续时长，实时获取显示装置显示的图像数据的频率，再根据频率获取所需的伽玛电压曲线，由此，将当前帧周期中最后一次确定的伽玛电压曲线应用于下一帧周期，在下一帧周期的显示阶段基于当前帧周期中最后一次确定的伽玛电压曲线进行伽玛电压校正，从而使得显示装置的伽玛电压曲线能跟随频率的变化而变化，即使得显示装置的频率和伽玛电压曲线能保持一致，以减小显示装置因频率变化而导致亮度差异较大的问题，由此防止显示装置发生闪烁现象。
在一些实施例中，场消隐持续时长确定模块502包括：
场消隐持续时长侦测单元，用于从当前帧周期的显示阶段结束时刻开始，实时侦测当前帧周期的场消隐阶段的当前持续时刻。
场消隐持续时长确定单元，用于确定当前帧周期的场消隐阶段的当前持续时刻距离当前帧周期的显示阶段的结束时刻的间隔时长，并将间隔时长作为场消隐阶段的当前持续时长。
在一些实施例中，伽玛电压曲线生成模块503包括：
频率确定单元，用于每当场消隐阶段的当前持续时长达到一个预先存储的场消隐时长，则根据预先存储的场消隐时长对应的频率，获取场消隐阶段的当前持续时长对应的频率。
伽玛电压曲线生成单元，用于基于预先存储的频率对应的伽玛电压曲线，场消隐阶段的当前持续时长对应的频率，获取场消隐阶段的当前持续时长对应的伽玛电压曲线。
在一些实施例中，伽玛电压曲线表示显示装置显示的图像数据的像素灰阶值与像素灰阶值对应的伽玛校正电压之间的关系。
在一些实施例中，像素灰阶电压生成模块504包括：
场消隐时长最终确定单元，用于在下一帧周期的显示阶段的开始时刻之前，确定当前帧周期的场消隐阶段的当前持续时长达到的最后一个场消隐时长。
频率最终确定单元，用于基于预先存储的场消隐时长对应的频率，根据当前帧周期的场消隐阶段的当前持续时长达到的最后一个场消隐时长，获取当前帧周期的场消隐阶段的当前持续时长最后对应的频率。
伽玛电压曲线最终生成单元，用于根据预先存储的频率对应的伽玛电压曲线，基于当前帧周期的场消隐阶段的当前持续时长最后对应的频率，获取当前帧周期最后一次确定的伽玛电压曲线。
伽玛电压校正单元，用于利用每个伽玛校正电压，在下一帧周期的显示阶段对每个伽玛校正电压对应的像素灰阶参考电压进行伽玛校正，以获取每个像素灰阶参考电压对应的像素灰阶电压。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (17)

  1. 一种伽玛电压校正方法，用于显示装置的可变频率模式下，其中，所述伽玛电压校正方法包括以下步骤：
    S1、预先存储所述显示装置显示的图像数据的多个频率以及每一所述频率对应的场消隐时长和伽玛电压曲线；
    S2、在当前帧周期中，实时获取所述当前帧周期的场消隐阶段的当前持续时长；其中，每一帧周期依次包括显示阶段和场消隐阶段；
    S3、每当所述场消隐阶段的当前持续时长达到一个所述场消隐时长，则获取一次所述场消隐阶段的当前持续时长对应的频率，并获取所述频率对应的伽玛电压曲线；
    S4、基于所述当前帧周期中最后一次确定的伽玛电压曲线，在下一帧周期的显示阶段对所述图像数据进行伽玛电压校正。
  2. 如权利要求1所述的伽玛电压校正方法，其中，步骤S2具体包括：
    从当前帧周期的显示阶段结束时刻开始，实时侦测所述当前帧周期的场消隐阶段的当前持续时刻；
    确定所述当前帧周期的场消隐阶段的当前持续时刻距离所述当前帧周期的显示阶段的结束时刻的间隔时长，并将所述间隔时长作为所述场消隐阶段的当前持续时长。
  3. 如权利要求1所述的伽玛电压校正方法，其中，步骤S3具体包括：
    每当所述场消隐阶段的当前持续时长达到一个预先存储的所述场消隐时长，则根据预先存储的所述场消隐时长对应的频率，获取所述场消隐阶段的当前持续时长对应的频率；
    基于预先存储的所述频率对应的伽玛电压曲线，所述场消隐阶段的当前持续时长对应的频率，获取所述场消隐阶段的当前持续时长对应的伽玛电压曲线。
  4. 如权利要求1所述的伽玛电压校正方法，其中，所述伽玛电压曲线表示所述显示装置显示的图像数据的像素灰阶值与所述像素灰阶值对应的伽玛校正电压之间的关系。
  5. 如权利要求4所述的伽玛电压校正方法，其中，步骤S4具体包括：
    在所述下一帧周期的显示阶段的开始时刻之前，确定所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长；
    基于预先存储的所述场消隐时长对应的频率，根据所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长，获取所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率；
    根据预先存储的所述频率对应的伽玛电压曲线，基于所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率，获取所述当前帧周期最后一次确定的伽玛电压曲线；
    基于所述当前帧周期中最后一次确定的伽玛电压曲线，根据所述图像数据包括的多个像素灰阶参考电压，确定最后一次确定的所述伽玛校正曲线包括的对应于每个所述像素灰阶参考电压的伽玛校正电压；
    利用每个所述伽玛校正电压，在所述下一帧周期的显示阶段对每个所述伽玛校正电压对应的所述像素灰阶参考电压进行伽玛校正，以获取每个所述像素灰阶参考电压对应的所述像素灰阶电压。
  6. 一种伽玛电压校正装置，用于显示装置的可变频率模式下，其中，所述伽玛电压校正装置包括：
    预先存储模块，用于预先存储所述显示装置显示的图像数据的多个频率以及每一所述频率对应的场消隐时长和伽玛电压曲线；
    场消隐持续时长确定模块，用于在当前帧周期中，实时获取所述当前帧周期的场消隐阶段的当前持续时长；其中，每一帧周期依次包括显示阶段和场消隐阶段；
    伽玛电压曲线生成模块，用于每当所述场消隐阶段的当前持续时长达到一个所述场消隐时长，则获取一次所述场消隐阶段的当前持续时长对应的频率，并获取所述频率对应的伽玛电压曲线；
    像素灰阶电压生成模块，用于基于所述当前帧周期中最后一次确定的伽玛电压曲线，在下一帧周期的显示阶段对所述图像数据进行伽玛电压校正。
  7. 如权利要求6所述的伽玛电压校正装置，其中，所述场消隐持续时长确定模块包括：
    场消隐持续时长侦测单元，用于从当前帧周期的显示阶段结束时刻开始，实时侦测所述当前帧周期的场消隐阶段的当前持续时刻；
    场消隐持续时长确定单元，用于确定所述当前帧周期的场消隐阶段的当前持续时刻距离所述当前帧周期的显示阶段的结束时刻的间隔时长，并将所述间隔时长作为所述场消隐阶段的当前持续时长。
  8. 如权利要求6所述的伽玛电压校正装置，其中，所述伽玛电压曲线生成模块包括：
    频率确定单元，用于每当所述场消隐阶段的当前持续时长达到一个预先存储的所述场消隐时长，则根据预先存储的所述场消隐时长对应的频率，获取所述场消隐阶段的当前持续时长对应的频率；
    伽玛电压曲线生成单元，用于基于预先存储的所述频率对应的伽玛电压曲线，所述场消隐阶段的当前持续时长对应的频率，获取所述场消隐阶段的当前持续时长对应的伽玛电压曲线。
  9. 如权利要求6所述的伽玛电压校正装置，其中，所述伽玛电压曲线表示所述显示装置显示的图像数据的像素灰阶值与所述像素灰阶值对应的伽玛校正电压之间的关系。
  10. 如权利要求9所述的伽玛电压校正装置，其中，所述像素灰阶电压生成模块包括：
    场消隐时长最终确定单元，用于在所述下一帧周期的显示阶段的开始时刻之前，确定所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长；
    频率最终确定单元，用于基于预先存储的所述场消隐时长对应的频率，根据所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长，获取所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率；
    伽玛电压曲线最终生成单元，用于根据预先存储的所述频率对应的伽玛电压曲线，基于所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率，获取所述当前帧周期最后一次确定的伽玛电压曲线；
    伽玛电压校正单元，用于利用每个所述伽玛校正电压，在所述下一帧周期的显示阶段对每个所述伽玛校正电压对应的所述像素灰阶参考电压进行伽玛校正，以获取每个所述像素灰阶参考电压对应的所述像素灰阶电压。
  11. 一种显示装置，其包括：时序控制器、伽玛电压校正装置、源极驱动器、栅极驱动器和显示面板，所述时序控制器分别与所述栅极驱动器和所述伽玛电压校正装置连接，所述伽玛电压校正装置与所述源极驱动器连接，所述栅极驱动器和所述源极驱动器分别与所述显示面板连接。
  12. 如权利要求1所述的显示装置，其中，所述显示装置工作于稳定频率模式或可变频率模式，所述伽玛电压校正装置用于所述显示装置的可变频率模式下。
  13. 如权利要求1所述的显示装置，其中，所述伽玛电压校正装置包括：
    预先存储模块，用于预先存储所述显示装置显示的图像数据的多个频率以及每一所述频率对应的场消隐时长和伽玛电压曲线；
    场消隐持续时长确定模块，用于在当前帧周期中，实时获取所述当前帧周期的场消隐阶段的当前持续时长；其中，每一帧周期依次包括显示阶段和场消隐阶段；
    伽玛电压曲线生成模块，用于每当所述场消隐阶段的当前持续时长达到一个所述场消隐时长，则获取一次所述场消隐阶段的当前持续时长对应的频率，并获取所述频率对应的伽玛电压曲线；
    像素灰阶电压生成模块，用于基于所述当前帧周期中最后一次确定的伽玛电压曲线，在下一帧周期的显示阶段对所述图像数据进行伽玛电压校正。
  14. 如权利要求13所述的显示装置，其中，所述场消隐持续时长确定模块包括：
    场消隐持续时长侦测单元，用于从当前帧周期的显示阶段结束时刻开始，实时侦测所述当前帧周期的场消隐阶段的当前持续时刻；
    场消隐持续时长确定单元，用于确定所述当前帧周期的场消隐阶段的当前持续时刻距离所述当前帧周期的显示阶段的结束时刻的间隔时长，并将所述间隔时长作为所述场消隐阶段的当前持续时长。
  15. 如权利要求13所述的显示装置，其中，所述伽玛电压曲线生成模块包括：
    频率确定单元，用于每当所述场消隐阶段的当前持续时长达到一个预先存储的所述场消隐时长，则根据预先存储的所述场消隐时长对应的频率，获取所述场消隐阶段的当前持续时长对应的频率；
    伽玛电压曲线生成单元，用于基于预先存储的所述频率对应的伽玛电压曲线，所述场消隐阶段的当前持续时长对应的频率，获取所述场消隐阶段的当前持续时长对应的伽玛电压曲线。
  16. 如权利要求13所述的显示装置，其中，所述伽玛电压曲线表示所述显示装置显示的图像数据的像素灰阶值与所述像素灰阶值对应的伽玛校正电压之间的关系。
  17. 如权利要求16所述的显示装置，其中，所述像素灰阶电压生成模块包括：
    场消隐时长最终确定单元，用于在所述下一帧周期的显示阶段的开始时刻之前，确定所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长；
    频率最终确定单元，用于基于预先存储的所述场消隐时长对应的频率，根据所述当前帧周期的场消隐阶段的当前持续时长达到的最后一个所述场消隐时长，获取所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率；
    伽玛电压曲线最终生成单元，用于根据预先存储的所述频率对应的伽玛电压曲线，基于所述当前帧周期的场消隐阶段的当前持续时长最后对应的频率，获取所述当前帧周期最后一次确定的伽玛电压曲线；
    伽玛电压校正单元，用于利用每个所述伽玛校正电压，在所述下一帧周期的显示阶段对每个所述伽玛校正电压对应的所述像素灰阶参考电压进行伽玛校正，以获取每个所述像素灰阶参考电压对应的所述像素灰阶电压。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118968917A (zh) * 2024-09-04 2024-11-15 合肥维信诺科技有限公司 显示驱动方法、显示装置以及计算机可读存储介质

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112767893B (zh) * 2021-02-22 2023-03-07 重庆京东方光电科技有限公司 显示驱动电路及其控制方法、显示装置
CN113077746A (zh) * 2021-03-23 2021-07-06 Tcl华星光电技术有限公司 显示面板的伽马校正方法及装置
CN113920939B (zh) * 2021-10-28 2022-09-16 合肥京东方卓印科技有限公司 亮度补偿方法、亮度补偿模块和显示装置
CN114333678B (zh) * 2021-12-29 2023-07-18 合肥维信诺科技有限公司 显示控制方法、装置、设备、存储介质及程序产品
CN118556264A (zh) * 2022-01-28 2024-08-27 华为技术有限公司 用于补偿显示面板的亮度的方法、装置以及设备
CN116153230B (zh) * 2023-02-28 2025-04-04 惠科股份有限公司 驱动电路、显示面板的驱动方法及其显示装置
CN116825042B (zh) * 2023-04-19 2024-05-17 惠科股份有限公司 伽马电压调节方法、伽马电压调节电路及显示装置
CN116453445B (zh) * 2023-04-27 2025-09-09 惠科股份有限公司 显示面板的驱动方法、驱动电路以及显示装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080309600A1 (en) * 2007-06-13 2008-12-18 Samsung Electronics Co., Ltd. Display apparatus and method for driving the same
CN101727868A (zh) * 2008-10-10 2010-06-09 华映视讯（吴江）有限公司 动态伽玛调整方法与其装置
CN101882417A (zh) * 2010-07-06 2010-11-10 华映光电股份有限公司 显示装置及伽玛电压产生器
CN104715708A (zh) * 2013-12-13 2015-06-17 乐金显示有限公司 用于显示设备的驱动电路
CN105793915A (zh) * 2013-10-10 2016-07-20 三星电子株式会社 显示驱动电路、显示设备及包括显示驱动电路和显示设备的便携式终端
CN109903725A (zh) * 2017-12-11 2019-06-18 三星显示有限公司 能够根据操作频率改变亮度的显示设备
CN110634439A (zh) * 2018-06-05 2019-12-31 三星显示有限公司 显示设备及其驱动方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009239899A (ja) * 2008-03-04 2009-10-15 Seiko Epson Corp 画像処理回路及びそれを含む電子機器
TWI493959B (zh) * 2009-05-07 2015-07-21 Mstar Semiconductor Inc 影像處理系統及影像處理方法
US10019968B2 (en) * 2015-12-31 2018-07-10 Apple Inc. Variable refresh rate display synchronization
CN106373516B (zh) * 2016-10-31 2019-08-13 北京集创北方科技股份有限公司 Led显示装置及其驱动方法
KR102521898B1 (ko) * 2018-06-28 2023-04-18 삼성디스플레이 주식회사 프레임 주파수를 변경할 수 있는 표시 장치 및 그것의 구동 방법
CN110491351B (zh) * 2019-09-27 2021-04-27 京东方科技集团股份有限公司 一种显示面板的驱动方法、其驱动装置及显示装置
CN111968582B (zh) * 2020-01-14 2022-04-15 Oppo广东移动通信有限公司 显示屏变频方法、ddic芯片、显示屏模组及终端
CN114495850A (zh) * 2020-10-23 2022-05-13 群创光电股份有限公司 电子装置及电子装置驱动方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080309600A1 (en) * 2007-06-13 2008-12-18 Samsung Electronics Co., Ltd. Display apparatus and method for driving the same
CN101727868A (zh) * 2008-10-10 2010-06-09 华映视讯（吴江）有限公司 动态伽玛调整方法与其装置
CN101882417A (zh) * 2010-07-06 2010-11-10 华映光电股份有限公司 显示装置及伽玛电压产生器
CN105793915A (zh) * 2013-10-10 2016-07-20 三星电子株式会社 显示驱动电路、显示设备及包括显示驱动电路和显示设备的便携式终端
CN104715708A (zh) * 2013-12-13 2015-06-17 乐金显示有限公司 用于显示设备的驱动电路
CN109903725A (zh) * 2017-12-11 2019-06-18 三星显示有限公司 能够根据操作频率改变亮度的显示设备
CN110634439A (zh) * 2018-06-05 2019-12-31 三星显示有限公司 显示设备及其驱动方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118968917A (zh) * 2024-09-04 2024-11-15 合肥维信诺科技有限公司 显示驱动方法、显示装置以及计算机可读存储介质

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