WO2020047910A1 - 液晶显示装置及其驱动方法 - Google Patents

液晶显示装置及其驱动方法 Download PDF

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Publication number
WO2020047910A1
WO2020047910A1 PCT/CN2018/106838 CN2018106838W WO2020047910A1 WO 2020047910 A1 WO2020047910 A1 WO 2020047910A1 CN 2018106838 W CN2018106838 W CN 2018106838W WO 2020047910 A1 WO2020047910 A1 WO 2020047910A1
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Prior art keywords
source
driving
unit
liquid crystal
crystal display
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PCT/CN2018/106838
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English (en)
French (fr)
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徐向阳
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深圳市华星光电半导体显示技术有限公司
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Publication of WO2020047910A1 publication Critical patent/WO2020047910A1/zh

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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
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

Definitions

  • the present disclosure relates to a display device, and particularly to a liquid crystal display device and a driving method thereof.
  • a source driving circuit provides a grayscale voltage corresponding to brightness to a data line
  • a gate driving circuit scans a thin film transistor (Thin) connected to the scanning line.
  • Film Transistor (TFT) When the thin film transistor is turned on, the voltage on the corresponding data line is provided to the pixel electrode via the data line and the thin film transistor to charge and discharge the liquid crystal capacitor to form a gray scale, thereby achieving image display.
  • the display panel can display at different refresh frequencies.
  • the refresh frequency refers to the number of times the liquid crystal display panel refreshes an image in a unit time, and the refresh frequency corresponds to the frame rate of the display signal.
  • the currently used refresh frequencies are 60Hz, 120Hz, and 240Hz.
  • FIG. 1 shows a charging waveform of a liquid crystal capacitor in the prior art.
  • the grayscale voltage output by the source driving circuit charges the liquid crystal capacitor.
  • Vd is the ideal grayscale voltage
  • V0 is the actual maximum charging voltage of the liquid crystal capacitor
  • V1 is the holding voltage of the liquid crystal capacitor after the thin film transistor is not turned on.
  • t1 is the scanning time
  • t0 is the charging time.
  • t1 and t0 depend on the resolution of the panel, the refresh frequency, and the RC delay of the signal. The higher the refresh frequency and the smaller t1 and t0, the lower the pixel charging rate.
  • the liquid crystal capacitor can be charged by an Over Driving method.
  • FIG. 2 shows a charging waveform of overdrive in the prior art.
  • the ideal gray-scale voltage is first increased to Vd1 and then Vd is decreased, thereby increasing the actual maximum charging voltage of the liquid crystal capacitor.
  • the over-driving method can improve the pixel charging rate, it will also increase the logic power consumption of the LCD panel.
  • screen flicker may occur, thereby affecting the screen display quality.
  • the overdrive method can increase the pixel charging rate, it will also increase the logic power consumption of the LCD panel.
  • screen flicker may occur, thereby affecting the screen display quality.
  • An object of the present disclosure is to provide a liquid crystal display device and a driving method thereof, which can solve the problems in the prior art.
  • a liquid crystal display device includes: a plurality of source lines and a plurality of gate lines, the source lines and the gate lines define a plurality of pixels; at least one gate drive A unit electrically connected to the gate line and providing a scanning signal to the gate line; at least one source driving unit electrically connected to the source line and providing a data signal to the source line; timing A controller electrically connected to the source driving unit and outputting a source control signal to the source driving unit, and the source driving unit adjusts the data signal to be transmitted to the pixel according to the source control signal
  • the data signal is data written into the pixel, the source control signal is a digital control signal; and a drive control unit, which is electrically connected to the source drive unit and the timing controller.
  • the drive control unit controls an overdrive voltage output from the source drive unit to the pixel according to a frequency of a drive control signal output from the timing controller to the drive control unit.
  • the drive control unit controls the source drive unit to increase the output to all The pixel overdrive voltage is described.
  • the driving control unit controls the source driving unit to reduce the output to the driving control unit. Pixel overdrive voltage.
  • the first frequency has a one-to-one correspondence with the frame rate of the liquid crystal display device.
  • the liquid crystal display device further includes a gamma voltage unit electrically connected to the source driving unit and providing a reference voltage to the source driving unit, where the reference voltage is used as the source.
  • a gamma voltage unit electrically connected to the source driving unit and providing a reference voltage to the source driving unit, where the reference voltage is used as the source.
  • a reference when the driving unit performs analog-to-digital conversion on the data signal.
  • a liquid crystal display device includes: a plurality of source lines and a plurality of gate lines, the source lines and the gate lines define a plurality of pixels; at least one gate drive A unit electrically connected to the gate line and providing a scanning signal to the gate line; at least one source driving unit electrically connected to the source line and providing a data signal to the source line; timing A controller electrically connected to the source driving unit and outputting a source control signal to the source driving unit, and the source driving unit adjusts the data signal to be transmitted to the pixel according to the source control signal And a driving control unit, which is electrically connected to the source driving unit and the timing controller, and the driving control unit is based on a frequency of a driving control signal output by the timing controller to the driving control unit, Controlling the over-driving voltage output from the source driving unit to the pixel.
  • the drive control unit controls the source drive unit to increase the output to all The pixel overdrive voltage is described.
  • the driving control unit controls the source driving unit to reduce the output to the driving control unit. Pixel overdrive voltage.
  • the first frequency has a one-to-one correspondence with the frame rate of the liquid crystal display device.
  • the liquid crystal display device further includes a gamma voltage unit electrically connected to the source driving unit and providing a reference voltage to the source driving unit, where the reference voltage is used as the source.
  • a gamma voltage unit electrically connected to the source driving unit and providing a reference voltage to the source driving unit, where the reference voltage is used as the source.
  • a reference when the driving unit performs analog-to-digital conversion on the data signal.
  • the liquid crystal display device includes a plurality of source lines, a plurality of gate lines, at least one gate driving unit, at least one source driving unit, a timing controller, And a driving control unit, the liquid crystal panel includes a plurality of source lines and a plurality of gate lines, the source lines and the gate lines define a plurality of pixels, and a driving method of the liquid crystal display device includes: The gate driving unit provides a scanning signal to the gate line; the source driving unit provides a data signal to the source line; and the driving control unit provides the driving control unit to the driving control unit according to the timing controller The frequency of the driving control output signal controls the over-driving voltage output by the source driving unit to the pixel.
  • the drive control unit controls the source drive unit to increase the output to all The pixel overdrive voltage is described.
  • the driving control unit controls the source driving unit to reduce the output to the driving control unit. Pixel overdrive voltage.
  • the first frequency has a one-to-one correspondence with the frame rate of the liquid crystal display device.
  • the liquid crystal display device further includes a gamma voltage unit electrically connected to the source driving unit and providing a reference voltage to the source driving unit, where the reference voltage is used as the source.
  • a gamma voltage unit electrically connected to the source driving unit and providing a reference voltage to the source driving unit, where the reference voltage is used as the source.
  • a reference when the driving unit performs analog-to-digital conversion on the data signal.
  • the liquid crystal display device and the driving method of the present disclosure increase the overdrive voltage to increase the pixel charging rate.
  • the liquid crystal display device and the driving method thereof of the present disclosure reduce the overdrive voltage, thereby reducing the power consumption.
  • reducing the overdrive voltage can avoid screen flicker, thereby ensuring the screen display quality.
  • FIG. 1 shows a charging waveform of a liquid crystal capacitor in the prior art.
  • FIG. 2 shows a charging waveform of overdrive in the prior art.
  • FIG. 3 shows a liquid crystal display device according to an embodiment of the present disclosure.
  • FIG. 4 shows a flowchart of a driving method of a liquid crystal display device according to an embodiment of the present disclosure.
  • FIG. 3 illustrates a liquid crystal display device according to an embodiment of the present disclosure.
  • the liquid crystal display device has a display area and a non-display area.
  • the liquid crystal display device includes at least one source driving unit 12 (one source driving unit 12 is shown in the figure), a timing controller 14, a driving control unit 16, a gamma voltage unit 18, and at least one gate driving unit. 20 (a gate driving unit 20 is shown in the figure) and a power supply unit 22.
  • the at least one source driving unit 12, the timing controller 14, the driving control unit 16, the gamma voltage unit 18, the at least one gate driving unit 20, and the power supply unit 22 are disposed in a non- On the display area.
  • the liquid crystal device further includes a plurality of source lines 100 and a plurality of gate lines 102 disposed in a display area.
  • the source line 100 is formed along a first direction.
  • the gate lines 102 are formed along a second direction.
  • the first direction is perpendicular to the second direction.
  • the source line 100 and the gate line 102 define a plurality of pixels 104.
  • Each of the pixels 104 is electrically connected to a thin film transistor 106.
  • the source driving unit 12 is electrically connected to the source line 100 and is used to provide a data signal to the source line 100.
  • the data signal is used to write to the pixel 104.
  • the gate driving unit 20 is electrically connected to the gate line 102 and provides a scanning signal to the gate line 102 to turn on the thin film transistor 106.
  • the timing controller 14 is electrically connected to the source driving unit 12 and the gate driving unit 20.
  • the timing controller 14 is configured to output a gate control signal to the gate driving unit 20, and the gate driving unit 20 adjusts a timing of transmitting a scan signal to the gate line 102 according to the gate control signal.
  • the timing controller 14 is configured to output a source control signal to the source driving unit 12, and the source driving unit 12 adjusts the data signal to be transmitted to the source through the thin film transistor 106 according to the source control signal.
  • the timing of the pixel 104 is described.
  • the data signal is data written into the pixel 104.
  • the gate control signal and the source control signal are digital control signals.
  • the gate driving unit 20 When the gate driving unit 20 provides a scanning signal to one of the gate lines 102, the thin film transistor 106 electrically connected to the one of the gate lines 102 is turned on.
  • the source driving unit 12 provides a data signal to the pixel 104 electrically connected to one of the gate lines 102 through the source line 100.
  • the gamma voltage unit 18 is electrically connected to the source driving unit 12 and configured to provide a reference voltage to the source driving unit 12.
  • the reference voltage is used as a reference when the source driving unit 12 performs analog-to-digital conversion on the data signal.
  • the driving control unit 16 is electrically connected to the source driving unit 12 and the timing controller 14.
  • the driving control unit 16 controls an over-driving voltage output from the source driving unit 12 to the pixel 104 according to a frequency of a driving control signal output from the timing controller 14 to the driving control unit 16.
  • the frequency of the driving control signal is a frequency required when the liquid crystal display device increases a pixel charging rate.
  • the over-driving voltage refers to a voltage that increases the data signal and then decreases the data signal.
  • the driving The control unit 16 controls the source driving unit 12 to increase the over-driving voltage output to the pixel 104.
  • the drive control unit 16 controls the source drive unit 12 reduces the over-driving voltage output to the pixel 104.
  • the first frequency has a one-to-one correspondence with the frame rate of the liquid crystal display device.
  • the first frequency corresponds to the frame rate of 60 Hertz (Hz). That is, when the frequency of the driving signal output from the timing controller 14 to the driving control unit 16 is equal to the first frequency, the frame rate representing the liquid crystal display panel is 60 Hz.
  • the driving control unit 16 controls the source driving unit 12 to increase the overdrive voltage.
  • the frame rate representing the liquid crystal display panel is less than 60 Hz.
  • the driving control unit 16 controls the source driving unit 12 to reduce the overdrive voltage.
  • the first frequency can be adjusted according to various characteristics of the liquid crystal display device.
  • the liquid crystal display device of the present disclosure increases the overdrive voltage to increase the pixel charging rate.
  • the liquid crystal display device of the present disclosure reduces the overdrive voltage, thereby reducing power consumption.
  • reducing the over-driving voltage can avoid screen flicker, thereby ensuring screen display quality.
  • the power supply unit 22 is electrically connected to the source driving unit 12, the timing controller 14, the driving control unit 16, the gamma voltage unit 18, and the gate driving unit 20.
  • the power supply unit 22 is configured to provide an operating voltage to the source driving unit 12, the timing controller 14, the driving control unit 16, the gamma voltage unit 18, and the gate driving unit 20.
  • FIG. 4 is a flowchart of a driving method of a liquid crystal display device according to an embodiment of the present disclosure.
  • the liquid crystal display device includes a plurality of source lines, a plurality of gate lines, at least one gate driving unit, at least one source driving unit, a timing controller, and a driving control unit.
  • the source line and the gate line define a plurality of pixels.
  • the driving method of the liquid crystal display device includes the following operations.
  • the gate driving unit provides a scanning signal to the gate line.
  • the source driving unit provides a data signal to the source line.
  • the drive control unit controls an overdrive voltage output from the source drive unit to the pixel according to a frequency of a drive control signal output from the timing controller to the drive control unit.
  • the driving control unit controls the source driving unit to increase the output to the driving control unit. Pixel overdrive voltage.
  • the drive control unit controls the source drive unit to reduce the overdrive voltage output to the pixel.
  • the first frequency has a one-to-one correspondence with the frame rate of the liquid crystal display device.
  • the liquid crystal display device further includes a gamma voltage unit electrically connected to the source driving unit and providing a reference voltage to the source driving unit, where the reference voltage is used as the source driving unit for the data.
  • the reference when the signal performs analog-to-digital conversion.
  • the liquid crystal display device and the driving method of the present disclosure increase the overdrive voltage to increase the pixel charging rate.
  • the liquid crystal display device and the driving method thereof of the present disclosure reduce the overdrive voltage, thereby reducing the power consumption.
  • reducing the overdrive voltage can avoid screen flicker, thereby ensuring the screen display quality.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)

Abstract

一种液晶显示装置和液晶显示装置的驱动方法，液晶显示装置包括：若干条源极线（100）以及若干条栅极线（102），源极线（100）及栅极线（102）定义出若干个像素（104）；至少一栅极驱动单元（20），向栅极线（102）提供扫描信号；至少一源极驱动单元（12），用于向源极线（100）提供数据信号；一时序控制器（14），向源极驱动单元（12）输出源极控制信号；以及驱动控制单元（16），根据时序控制器（14）输出至驱动控制单元（16）的驱动控制信号的频率，控制源极驱动单元（12）输出至像素（104）的过驱动电压。

Description

液晶显示装置及其驱动方法 技术领域
本揭示涉及显示装置，特别是涉及一种液晶显示装置及其驱动方法。
 背景技术
于液晶显示面板中，源极驱动电路对数据线提供对应亮度的灰阶电压，栅极驱动电路扫描与扫描线连接的薄膜晶体管（Thin Film Transistor，TFT）的栅极。当薄膜晶体管导通时，对应的数据线上的电压经数据线和薄膜晶体管被提供到像素电极，以对液晶电容进行充放电，形成灰阶，进而实现图像显示。
显示面板可在不同的刷新频率下进行显示。刷新频率是指液晶显示面板在单位时间内刷新图像的次数，刷新频率与显示信号的帧速率相对应。目前常用的刷新频率为60Hz、120Hz和240Hz。
请参阅图1，图1显示现有技术中液晶电容的充电波形。当栅极驱动电路所输出之栅极扫描信号从低电平转换至高电平时，源极驱动电路所输出之灰阶电压对液晶电容进行充电。如图1所示，Vd为理想灰阶电压，V0为液晶电容的实际最高充电电压，V1为薄膜晶体管不导通后，液晶电容的保持电压。t1为扫描时间，t0扫充电时间。t1和t0取决于面板的分辨率、刷新频率和信号的RC延时。刷新频率越高且t1和t0越小，则像素充电率越低。
为了提升高刷新频率的像素充电率，可通过过驱动（Over Driving）的方式对液晶电容进行充电。请参阅图2，图2显示现有技术中过驱动的充电波形。如图2所示，将理想灰阶电压先增大至Vd1后再减小Vd，藉此提高液晶电容的实际最高充电电压。然而，过驱动方式虽然能提升像素充电率，但也会增加液晶显示面板的逻辑功耗。此外，当液晶显示面板以低频驱动时会产生画面闪烁，进而影响到画面显示质量。
因此需要对现有技术中的问题提出解决方法。
 技术问题
过驱动方式虽然能提升像素充电率，但也会增加液晶显示面板的逻辑功耗。此外，当液晶显示面板以低频驱动时会产生画面闪烁，进而影响到画面显示质量。
 技术解决方案
本揭示的目的在于提供一种液晶显示装置及其驱动方法，其能解决现有技术中的问题。
为解决上述问题，本揭示提供的一种液晶显示装置包括：若干条源极线以及若干条栅极线，所述源极线及所述栅极线定义出若干个像素；至少一栅极驱动单元，电性连接至所述栅极线并向所述栅极线提供扫描信号；至少一源极驱动单元，电性连接至所述源极线并向所述源极线提供数据信号；时序控制器，电性连接至所述源极驱动单元并向所述源极驱动单元输出源极控制信号，所述源极驱动单元根据所述源极控制信号调整所述数据信号输送至所述像素的时序，所述数据信号为写入所述像素的资料，所述源极控制信号为数字控制信号；以及驱动控制单元，电性连接至所述源极驱动单元及所述时序控制器，所述驱动控制单元根据所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率，控制所述源极驱动单元输出至所述像素的过驱动电压。
于一实施例中，当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率大于或等于一第一频率时，所述驱动控制单元控制所述源极驱动单元提高输出至所述像素的过驱动电压。
于一实施例中，当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率小于所述第一频率时，所述驱动控制单元控制所述源极驱动单元降低输出至所述像素的过驱动电压。
于一实施例中，所述第一频率与所述液晶显示装置的帧率具有一对一的对应关系。
于一实施例中，所述液晶显示装置进一步包括伽马电压单元电性连接至所述源极驱动单元并向所述源极驱动单元提供基准电压，所述基准电压用于作为所述源极驱动单元对所述数据信号执行模数转换时的基准。
为解决上述问题，本揭示提供的一种液晶显示装置包括：若干条源极线以及若干条栅极线，所述源极线及所述栅极线定义出若干个像素；至少一栅极驱动单元，电性连接至所述栅极线并向所述栅极线提供扫描信号；至少一源极驱动单元，电性连接至所述源极线并向所述源极线提供数据信号；时序控制器，电性连接至所述源极驱动单元并向所述源极驱动单元输出源极控制信号，所述源极驱动单元根据所述源极控制信号调整所述数据信号输送至所述像素的时序；以及驱动控制单元，电性连接至所述源极驱动单元及所述时序控制器，所述驱动控制单元根据所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率，控制所述源极驱动单元输出至所述像素的过驱动电压。
于一实施例中，当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率大于或等于一第一频率时，所述驱动控制单元控制所述源极驱动单元提高输出至所述像素的过驱动电压。
于一实施例中，当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率小于所述第一频率时，所述驱动控制单元控制所述源极驱动单元降低输出至所述像素的过驱动电压。
于一实施例中，所述第一频率与所述液晶显示装置的帧率具有一对一的对应关系。
于一实施例中，所述液晶显示装置进一步包括伽马电压单元电性连接至所述源极驱动单元并向所述源极驱动单元提供基准电压，所述基准电压用于作为所述源极驱动单元对所述数据信号执行模数转换时的基准。
本揭示提供的一种液晶显示装置之驱动方法中，所述液晶显示装置包括若干条源极线、若干条栅极线、至少一栅极驱动单元、至少一源极驱动单元、时序控制器、以及驱动控制单元，所述液晶面板包括若干条源极线以及若干条栅极线，所述源极线及所述栅极线定义出若干个像素，所述种液晶显示装置之驱动方法包括：所述栅极驱动单元向所述栅极线提供扫描信号；所述源极驱动单元向所述源极线提供数据信号；以及所述驱动控制单元根据所述时序控制器至所述驱动控制单元的驱动控制输出信号的频率，控制所述源极驱动单元输出至所述像素的过驱动电压。
于一实施例中，当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率大于或等于一第一频率时，所述驱动控制单元控制所述源极驱动单元提高输出至所述像素的过驱动电压。
于一实施例中，当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率小于所述第一频率时，所述驱动控制单元控制所述源极驱动单元降低输出至所述像素的过驱动电压。
于一实施例中，所述第一频率与所述液晶显示装置的帧率具有一对一的对应关系。
于一实施例中，所述液晶显示装置进一步包括伽马电压单元电性连接至所述源极驱动单元并向所述源极驱动单元提供基准电压，所述基准电压用于作为所述源极驱动单元对所述数据信号执行模数转换时的基准。
 有益效果
相较于现有技术，于高帧率模式下，本揭示之液晶显示装置及其驱动方法提高过驱动电压来提升像素充电率。于低帧率模式下，本揭示之液晶显示装置及其驱动方法降低过驱动电压，藉此可降低消耗功率。此外，降低过驱动电压能避免画面闪烁，进而保证画面显示质量。
 附图说明
图1显示现有技术中液晶电容的充电波形。
图2显示现有技术中过驱动的充电波形。
图3显示根据本揭示一实施例之液晶显示装置。
图4显示根据本揭示一实施例之液晶显示装置之驱动方法的流程图。
 本发明的实施方式
以下各实施例的说明是参考附加的图式，用以例示本揭示可用以实施的特定实施例。
请参阅图3，图3显示根据本揭示一实施例之液晶显示装置。
所述液晶显示装置具有一显示区以及一非显示区。所述液晶显示装置包括至少一源极驱动单元12（图中显示一个源极驱动单元12）、一时序控制器14、一驱动控制单元16、一伽马电压单元18、至少一栅极驱动单元20（图中显示一个栅极驱动单元20）以及一电源单元22。所述至少一源极驱动单元12、所述时序控制器14、所述驱动控制单元16、所述伽马电压单元18、所述至少一栅极驱动单元20及所述电源单元22设置于非显示区上。
所述液晶装置还包括设置于显示区的若干条源极线100以及若干条栅极线102。所述源极线100沿一第一方向形成。所述栅极线102沿一第二方向形成。所述第一方向垂直于所述第二方向。所述源极线100及所述栅极线102定义出若干个像素104。每一所述像素104电性连接至一薄膜晶体管106。
所述源极驱动单元12电性连接至所述源极线100并用于向所述源极线100提供数据信号，所述数据信号用于写入所述像素104。
所述栅极驱动单元20电性连接至所述栅极线102并用向所述栅极线102提供扫描信号以导通所述薄膜晶体管106。
所述时序控制器14电性连接至所述源极驱动单元12及所述栅极驱动单元20。所述时序控制器14用于向所述栅极驱动单元20输出栅极控制信号，所述栅极驱动单元20根据所述栅极控制信号调整扫描信号输送至所述栅极线102的时序。所述时序控制器14用于向所述源极驱动单元12输出源极控制信号，所述源极驱动单元12根据所述源极控制信号调整所述数据信号通过所述薄膜晶体管106输送至所述像素104的时序。所述数据信号为写入所述像素104的资料。所述栅极控制信号及所述源极控制信号为数字控制信号。
当所述栅极驱动单元20提供扫描信号给所述栅极线102之其中一者时，与所述栅极线102之该其中一者电性连接的薄膜晶体管106被导通。所述源极驱动单元12通过所述源极线100提供数据信号给与所述栅极线102之该其中一者电性连接的像素104。
所述伽马电压单元18电性连接至所述源极驱动单元12并用于向所述源极驱动单元12提供基准电压。所述基准电压用于作为所述源极驱动单元12对所述数据信号执行模数转换时的基准。
所述驱动控制单元16电性连接至所述源极驱动单元12及所述时序控制器14。所述驱动控制单元16根据所述时序控制器14输出至所述驱动控制单元16的驱动控制信号的频率，控制所述源极驱动单元12输出至所述像素104的过驱动电压。所述驱动控制信号的频率为使所述液晶显示装置提升像素充电率时所需的频率。
所述过驱动电压是指先增大上述数据信号后再减小数据信号的电压。
更明确地说，于一高帧率（frame rate）模式下，当所述时序控制器14输出至所述驱动控制单元16的驱动控制信号的频率大于或等于一第一频率时，所述驱动控制单元16控制所述源极驱动单元12提高输出至所述像素104的过驱动电压。
于一低帧率模式下，当所述时序控制器14输出至所述驱动控制单元16的驱动控制信号的频率小于所述第一频率时，所述驱动控制单元16控制所述源极驱动单元12降低输出至所述像素104的过驱动电压。
所述第一频率与所述液晶显示装置的帧率具有一对一的对应关系。于一实施例中，所述第一频率对应至所述帧率为60赫兹（Hertz，Hz）。也就是说，当所述时序控制器14输出至所述驱动控制单元16的驱动信号的频率等于所述第一频率时，代表所述液晶显示面板之所述帧率为60赫兹。所述驱动控制单元16控制所述源极驱动单元12提高所述过驱动电压。
当所述时序控制器14输出至所述驱动控制单元16的驱动信号的频率小于所述第一频率时，代表所述液晶显示面板之所述帧率小于60赫兹。所述驱动控制单元16控制所述源极驱动单元12降低所述过驱动电压。
所述第一频率可根据所述液晶显示装置的各种特性调整。
综上可知，于高帧率模式下，本揭示之液晶显示装置提高所述过驱动电压来提升像素充电率。于低帧率模式下，本揭示之液晶显示装置降低所述过驱动电压，藉此可降低消耗功率。此外，降低所述过驱动电压能避免画面闪烁，进而保证画面显示质量。
所述电源单元22电性连接至所述源极驱动单元12、所述时序控制器14、所述驱动控制单元16、所述伽马电压单元18、以及所述栅极驱动单元20。所述电源单元22用于向所述源极驱动单元12、所述时序控制器14、所述驱动控制单元16、所述伽马电压单元18、以及所述栅极驱动单元20提供操作电压。
请参阅图4，图4显示根据本揭示一实施例之液晶显示装置之驱动方法的流程图。
所述液晶显示装置包括若干条源极线、若干条栅极线、至少一栅极驱动单元、至少一源极驱动单元、时序控制器、以及驱动控制单元。所述源极线及所述栅极线定义出若干个像素。所述种液晶显示装置之驱动方法包括下列操作。
操作S40中，所述栅极驱动单元向所述栅极线提供扫描信号。
操作S42中，所述源极驱动单元向所述源极线提供数据信号。
操作S44中，所述驱动控制单元根据所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率，控制所述源极驱动单元输出至所述像素的过驱动电压。
于操作S44中，当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率大于或等于一第一频率时，所述驱动控制单元控制所述源极驱动单元提高输出至所述像素的过驱动电压。当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率小于所述第一频率时，所述驱动控制单元控制所述源极驱动单元降低输出至所述像素的过驱动电压。
所述第一频率与所述液晶显示装置的帧率具有一对一的对应关系。
所述液晶显示装置进一步包括伽马电压单元电性连接至所述源极驱动单元并向所述源极驱动单元提供基准电压，所述基准电压用于作为所述源极驱动单元对所述数据信号执行模数转换时的基准。
于高帧率模式下，本揭示之液晶显示装置及其驱动方法提高过驱动电压来提升像素充电率。于低帧率模式下，本揭示之液晶显示装置及其驱动方法降低过驱动电压，藉此可降低消耗功率。此外，降低过驱动电压能避免画面闪烁，进而保证画面显示质量。
综上所述，虽然本揭示已以优选实施例揭露如上，但上述优选实施例并非用以限制本揭示，本领域的普通技术人员，在不脱离本揭示的精神和范围内，均可作各种更动与润饰，因此本揭示的保护范围以权利要求界定的范围为准。

Claims (15)

  1. 一种液晶显示装置，包括：
    若干条源极线以及若干条栅极线，所述源极线及所述栅极线定义出若干个像素；
    至少一栅极驱动单元，电性连接至所述栅极线并向所述栅极线提供扫描信号；
    至少一源极驱动单元，电性连接至所述源极线并向所述源极线提供数据信号；
    时序控制器，电性连接至所述源极驱动单元并向所述源极驱动单元输出源极控制信号，所述源极驱动单元根据所述源极控制信号调整所述数据信号输送至所述像素的时序，所述数据信号为写入所述像素的资料，所述源极控制信号为数字控制信号；以及
    驱动控制单元，电性连接至所述源极驱动单元及所述时序控制器，所述驱动控制单元根据所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率，控制所述源极驱动单元输出至所述像素的过驱动电压。
  2. 根据权利要求1所述的液晶显示装置，其中当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率大于或等于一第一频率时，所述驱动控制单元控制所述源极驱动单元提高输出至所述像素的过驱动电压。
  3. 根据权利要求2所述的液晶显示装置，其中当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率小于所述第一频率时，所述驱动控制单元控制所述源极驱动单元降低输出至所述像素的过驱动电压。
  4. 根据权利要求2所述的液晶显示装置，其中所述第一频率与所述液晶显示装置的帧率具有一对一的对应关系。
  5. 根据权利要求1所述的液晶显示装置，进一步包括伽马电压单元电性连接至所述源极驱动单元并向所述源极驱动单元提供基准电压，所述基准电压用于作为所述源极驱动单元对所述数据信号执行模数转换时的基准。
  6. 一种液晶显示装置，包括：
    若干条源极线以及若干条栅极线，所述源极线及所述栅极线定义出若干个像素；
    至少一栅极驱动单元，电性连接至所述栅极线并向所述栅极线提供扫描信号；
    至少一源极驱动单元，电性连接至所述源极线并向所述源极线提供数据信号；
    时序控制器，电性连接至所述源极驱动单元并向所述源极驱动单元输出源极控制信号，所述源极驱动单元根据所述源极控制信号调整所述数据信号输送至所述像素的时序；以及
    驱动控制单元，电性连接至所述源极驱动单元及所述时序控制器，所述驱动控制单元根据所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率，控制所述源极驱动单元输出至所述像素的过驱动电压。
  7. 根据权利要求6所述的液晶显示装置，其中当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率大于或等于一第一频率时，所述驱动控制单元控制所述源极驱动单元提高输出至所述像素的过驱动电压。
  8. 根据权利要求7所述的液晶显示装置，其中当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率小于所述第一频率时，所述驱动控制单元控制所述源极驱动单元降低输出至所述像素的过驱动电压。
  9. 根据权利要求7所述的液晶显示装置，其中所述第一频率与所述液晶显示装置的帧率具有一对一的对应关系。
  10. 根据权利要求6所述的液晶显示装置，进一步包括伽马电压单元电性连接至所述源极驱动单元并向所述源极驱动单元提供基准电压，所述基准电压用于作为所述源极驱动单元对所述数据信号执行模数转换时的基准。
  11. 一种液晶显示装置之驱动方法，所述液晶显示装置包括若干条源极线、若干条栅极线、至少一栅极驱动单元、至少一源极驱动单元、时序控制器、以及驱动控制单元，所述源极线及所述栅极线定义出若干个像素，所述种液晶显示装置之驱动方法包括：
    所述栅极驱动单元向所述栅极线提供扫描信号；
    所述源极驱动单元向所述源极线提供数据信号；以及
    所述驱动控制单元根据所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率，控制所述源极驱动单元输出至所述像素的过驱动电压。
  12. 根据权利要求11所述的液晶显示装置之驱动方法，其中当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率大于或等于一第一频率时，所述驱动控制单元控制所述源极驱动单元提高输出至所述像素的过驱动电压。
  13. 根据权利要求12所述的液晶显示装置之驱动方法，其中当所述时序控制器输出至所述驱动控制单元的驱动控制信号的频率小于所述第一频率时，所述驱动控制单元控制所述源极驱动单元降低输出至所述像素的过驱动电压。
  14. 根据权利要求12所述的液晶显示装置之驱动方法，其中所述第一频率与所述液晶显示装置的帧率具有一对一的对应关系。
  15. 根据权利要求11所述的液晶显示装置之驱动方法，所述液晶显示装置进一步包括伽马电压单元电性连接至所述源极驱动单元并向所述源极驱动单元提供基准电压，所述基准电压用于作为所述源极驱动单元对所述数据信号执行模数转换时的基准。
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CN110288958B (zh) * 2019-06-11 2021-10-01 重庆惠科金渝光电科技有限公司 显示面板的驱动方法、驱动装置及显示装置
CN110910809A (zh) * 2019-11-25 2020-03-24 Tcl华星光电技术有限公司 一种驱动电路及显示装置
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