WO2016106866A1 - 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
WO2016106866A1
WO2016106866A1 PCT/CN2015/070855 CN2015070855W WO2016106866A1 WO 2016106866 A1 WO2016106866 A1 WO 2016106866A1 CN 2015070855 W CN2015070855 W CN 2015070855W WO 2016106866 A1 WO2016106866 A1 WO 2016106866A1
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Prior art keywords
gamma
gamma voltage
voltage values
liquid crystal
crystal display
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PCT/CN2015/070855
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English (en)
French (fr)
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秦杰辉
谭小平
陈伟
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深圳市华星光电技术有限公司
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Priority to US14/425,047 priority Critical patent/US9659537B2/en
Publication of WO2016106866A1 publication Critical patent/WO2016106866A1/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
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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

Definitions

  • the invention belongs to the technical field of liquid crystal display, and in particular to a liquid crystal display device and a driving method thereof.
  • liquid crystal display LCD
  • space utilization efficiency high space utilization efficiency
  • low consumption high space utilization efficiency
  • Many superior features such as power, no radiation and low electromagnetic interference have become the mainstream of the market.
  • the liquid crystal display device generally includes a liquid crystal display panel and a backlight module (Black Light Module, abbreviated as BL). Since the liquid crystal display panel itself does not have self-illuminating characteristics, the backlight module must be disposed under the liquid crystal display panel to provide a surface light source required for the liquid crystal display panel, such that the liquid crystal display panel can provide a surface light source provided by the backlight module. And the image is displayed.
  • BL Black Light Module
  • each liquid crystal cell corresponds to a thin film transistor (hereinafter referred to as TFT), and the TFT can control the switching of each liquid crystal cell, that is, each TFT can be understood as a valve, and the closing of the valve can control the corresponding pixel unit.
  • TFT thin film transistor
  • the valve can control the degree of switching of the valve by the applied voltage, and control the level of the luminous intensity of the pixel unit in conjunction with the intensity of the backlight, thereby achieving the purpose of hierarchically controlling the gray scale.
  • the brightness of a liquid crystal display device has a certain relationship with the transmittance, and the transmittance is related to the voltage applied to the pixel. Therefore, the brightness of the liquid crystal display device is related to the voltage on each pixel. Usually the relationship between voltage and penetration is expressed by a gamma curve.
  • the Gamma voltage is usually divided into two groups by a common voltage VCOM, wherein a larger Gamma voltage group than the common voltage VCOM and a negative Gamma smaller than the common voltage VCOM. Voltage group.
  • the liquid crystal display device displays the gray scales of the two sets of Gamma voltages symmetrical with the common voltage VCOM.
  • 1 is a schematic view showing the structure of a liquid crystal display device of the prior art. Referring to FIG.
  • the gamma generator 150 supplies all of its positive Gamma voltage and negative Gamma voltage to the data driver (Source IC) 120 at one time, and the data driver 120 is based on The polarity inversion (POL) signal provided by the timing control device 110 selects a corresponding Gamma voltage from the positive Gamma voltage and the negative Gamma voltage supplied from the gamma generator 150, and performs gamma correction on the data analog voltage by using the selected Gamma voltage. And supplying a gamma-corrected data analog voltage to the liquid crystal display panel 140, wherein the data analog voltage is received by the data driver 120 from the video controller digital signal (ie, the data signal in FIG. 1) ) converted into.
  • POL polarity inversion
  • the memory selection pin externally set by the generator 150 needs to have at least 20, and at least 20 traces connected to the data driver 120, which will cause a complicated driving structure and increase the wiring area on the liquid crystal display panel. It is advantageous for the narrow bezel design of the liquid crystal display device, and the number of wires is large, so that the cost is also increased.
  • an object of the present invention is to provide a liquid crystal display device including a gamma generator and a liquid crystal display panel, the gamma generator including a first memory unit and a second memory unit;
  • the first storage unit stores a set of first gamma voltage values
  • the second storage unit stores a set of second gamma voltage values
  • the first gamma voltage value is a positive gamma voltage value
  • the second The gamma voltage value is a negative gamma voltage value
  • the first gamma voltage value is a negative gamma voltage value
  • the second gamma voltage value is a positive gamma voltage value
  • the gamma generator is based on Controlling a polarity inversion signal, periodically acquiring the set of first gamma voltage values from the first storage unit, or periodically acquiring the set of second gamma from the second storage unit a horse voltage value
  • the liquid crystal display panel performs image display based on the set of first gamma voltage
  • the first storage unit further stores a first gamma value corresponding to the set of first gamma voltage values
  • the second storage unit further stores a first gamma voltage value corresponding to the set of second gamma voltage values a second gamma value, wherein the first gamma value is equal to the second gamma value.
  • the liquid crystal display device further includes a timing controller, wherein the timing controller generates the polarity inversion signal.
  • the liquid crystal display device further includes a data driver, wherein the data driver is based on the digital signal provided by the timing controller and the set of first gamma voltage values provided by the gamma generator, or And obtaining a voltage value of each pixel on the liquid crystal display panel based on the digital signal provided by the timing controller and the set of second gamma voltage values provided by the gamma generator, and the voltage of each pixel The value is sent to the liquid crystal display panel.
  • the data driver is based on the digital signal provided by the timing controller and the set of first gamma voltage values provided by the gamma generator, or And obtaining a voltage value of each pixel on the liquid crystal display panel based on the digital signal provided by the timing controller and the set of second gamma voltage values provided by the gamma generator, and the voltage of each pixel The value is sent to the liquid crystal display panel.
  • the gamma generator is a programmable gamma generator.
  • first storage unit and the second storage unit are both non-volatile storage units.
  • Another object of the present invention is to provide a driving method of a liquid crystal display device, comprising: periodically acquiring a set of first gamma voltage values or a set of second gamma voltage values based on control of a polarity inversion signal; Performing image display based on the set of first gamma voltage values and/or the set of second gamma voltage values; wherein the first gamma voltage value is a positive gamma voltage value, the second gamma The horse voltage value is a negative gamma voltage value; or the first gamma voltage value is a negative gamma voltage value, and the second gamma voltage value is a positive gamma voltage value.
  • the set of first gamma voltage values corresponds to a first gamma value
  • the set of second gamma voltage values corresponds to a second gamma value, wherein the first gamma value
  • the second gamma values are equal.
  • the polarity inversion signal is generated before the periodically acquiring a set of first gamma voltage values or a set of second gamma voltage values.
  • the specific method for performing image display based on the set of first gamma voltage values or the set of second gamma voltage values is: using the set of first gamma voltage values or the one
  • the second gamma voltage value is gamma-corrected to the data analog voltage to generate a voltage value of each pixel of the liquid crystal display device, and the voltage value of each pixel is supplied to the respective pixel.
  • the number of memory selection pins externally set by the gamma generator is reduced, and the wiring connected to the data driver is also reduced, thereby effectively reducing the cost, and simultaneously Simplifying the driving structure of the liquid crystal display device and reducing the wiring area on the liquid crystal display panel, Conducive to the narrow frame design of the liquid crystal display device.
  • FIG. 1 is a schematic structural view of a liquid crystal display device of the prior art
  • FIG. 2 is a schematic block diagram of a liquid crystal display device in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic block diagram of a liquid crystal display device in accordance with an embodiment of the present invention.
  • a liquid crystal display device includes a timing controller 10, a data driver 20, a scan driver 30, a liquid crystal display panel 40, and a gamma generator 50.
  • the timing controller 10 is operative to generate a polarity flip (POL) signal and provide the POL signal to a gamma generator 50.
  • POL polarity flip
  • the gamma generator 50 is a programmable gamma generator.
  • the gamma generator 50 includes a first memory unit 51, a second memory unit 52, and a hardware port BANK_SEL for receiving a POL signal supplied from the timing controller 10.
  • the first storage unit 51 is preferably a non-volatile storage unit that stores a set of first gamma voltage values and a first gamma value corresponding to the set of first gamma voltage values, wherein the set of first The gamma voltage value includes a plurality of first gamma voltage values (eg, including 10 first gamma voltage values).
  • the first gamma value may be 2.2, but the present invention is not limited thereto.
  • the second storage unit 52 is preferably a non-volatile storage unit that stores a set of second gamma voltage values And a second gamma value corresponding to the set of second gamma voltage values, wherein the set of second gamma voltage values includes a plurality of second gamma voltage values (eg, including 10 second gamma voltage values) ).
  • the second gamma value may be 2.2, but the present invention is not limited thereto. In other words, the second gamma value is equal to the first gamma value.
  • the first gamma voltage value is a positive gamma voltage value and the second gamma voltage value is a negative gamma voltage value. It should be understood that as other embodiments of the present invention, the first gamma voltage value is a negative gamma voltage value and the second gamma voltage value is a positive gamma voltage value.
  • the gamma generator 50 periodically acquires a set of first gamma voltage values from the first storage unit 51 based on control of the POL signal, or periodically acquires the set of second gamma from the second storage unit 52. Horse voltage value.
  • the gamma generator 50 receives the POL signal supplied from the timing controller 10 through its hardware port BANK_SEL, wherein when the POL signal is at a high level, the first gamma value in the first memory unit 51 is acquired, and then Obtaining a set of first gamma voltage values according to the first gamma value; and acquiring a second gamma value in the second storage unit 52 when the POL signal received by the hardware port BANK_SEL of the gamma generator 50 is low level And obtaining a set of second gamma voltage values according to the second gamma value.
  • the period of the POL signal is one time of the picture refresh period, that is, when the POL signal is at a high level, the picture displays one frame;
  • the POL signal is low, the screen displays another frame.
  • the timing controller 10 controls the data driver 20 and supplies the video driver 20 with a video digital signal (i.e., the data signal shown in FIG. 2).
  • the data driver 20 receives the video digital signal supplied from the timing controller 10 and converts the video digital signal into a data analog voltage, while the data driver 20 receives a set of the first from the gamma generator 50 when the POL signal is at a high level.
  • a gamma voltage value and gamma correction of the data analog voltage by the set of first gamma voltage values to generate a voltage value of each pixel on the liquid crystal display panel; or the data driver 20 when the POL signal is low
  • the period of the POL signal is the same as the picture refresh period, that is, the high level of the POL signal continues.
  • the time of the low time of the POL signal is the same as the time of displaying one frame of the picture.
  • the data driver 20 receives the video digital signal supplied from the timing controller 10 and converts the video digital signal into a data analog voltage, while the data driver 20 receives a set of the first from the gamma generator 50 when the POL signal is at a high level.
  • a gamma voltage value a gamma voltage value
  • the data driver 20 is low in the POL signal
  • the prior art gamma generator 150 shown in FIG. 1 needs to generate 20 gamma voltages (of which, the positive gamma voltage is 10, negative gamma The horse voltage is 10) is simultaneously supplied to the data driver 120, and the externally set memory selection pin needs to have at least 20, and at least 20 traces connected to the data driver, and the gamma of the embodiment of the present invention
  • the generator 50 selectively supplies 10 positive gamma voltages or 10 negative gamma voltages to the data driver 20 according to whether the POL signal is high level or low level, and the externally set memory selection pin only needs to have 10, 0, and the number of traces connected to the data driver 20 is also reduced to 10.
  • the timing controller 10 controls the scan driver 30 to set the horizontal scan start in accordance with the timing of display of each frame.
  • the scan driver 30 accepts the control of the timing controller 10 to sequentially supply scan signals to scan lines (not shown) on the liquid crystal display panel 40.
  • the liquid crystal display panel 40 receives the voltage value from each pixel supplied from the data driver 20 and the scan signal supplied from the scan driver 30, and displays the image via the voltage value of each pixel supplied from the data driver 20 and the scan signal supplied from the scan scan driver 30.
  • the number of memory selection pins externally set by the gamma generator is reduced, and the wiring connected to the data driver is also reduced, thereby effectively reducing the cost.
  • the driving structure of the liquid crystal display device is simplified, the wiring area on the liquid crystal display panel is reduced, and the narrow bezel design of the liquid crystal display device is facilitated.

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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)

Abstract

一种液晶显示装置，包括伽马发生器（50）及液晶显示面板（40），伽马发生器（50）包括第一存储单元（51）及第二存储单元（52）；第一存储单元（51）存储一组正伽马电压值或负伽马电压值，第二存储单元（52）存储一组负伽马电压值或正伽马电压值；伽马发生器（50）基于极性翻转信号的控制，从第一存储单元（51）中周期性地获取一组正伽马电压值或负伽马电压值，或者从第二存储单元（52）中周期性地获取一组负伽马电压值或正伽马电压值；液晶显示面板（40）基于一组正伽马电压值和/或一组负伽马电压值进行图像显示。与现有技术相比，能有效地降低成本，同时简化驱动结构，减小布线面积，利于窄边框设计。

Description

液晶显示装置及其驱动方法 技术领域
本发明属于液晶显示技术领域，具体地讲，涉及一种液晶显示装置及其驱动方法。
背景技术
随着光电与半导体技术的演进，也带动了平板显示器(Flat Panel Display)的蓬勃发展，而在诸多平板显示器中，液晶显示装置(Liquid Crystal Display，简称LCD)因具有高空间利用效率、低消耗功率、无辐射以及低电磁干扰等诸多优越特性，已成为市场的主流。
液晶显示装置通常包括液晶显示面板(Liquid Crystal Panel)与背光模块(Black Light Module，简称BL)。由于液晶显示面板本身并不具备自发光的特性，因此必须将背光模组配置在液晶显示面板下方，以提供液晶显示面板所需的面光源，如此液晶显示面板可借由背光模块提供的面光源而显示影像。
在液晶显示装置中，每一个液晶单元对应一个薄膜晶体管(下称TFT)，TFT可以控制每一个液晶单元的开关，即可以将每一个TFT理解为一个阀门，阀门的关闭可以控制相应像素单元的明暗程度；将阀门打开，光线可以通过，则可以得到亮的像素单元，若阀门关闭，光线不可通过，则得到暗的像素单元。阀门除了具有开关功能外，还可以籍由施加的电压大小来控制阀门的开关程度，在配合背光源强度控制像素单元发光强度的等级，进而达到分级控制灰阶的目的。
液晶显示装置的亮度与穿透度存在一定关系，而穿透度与作用在像素上的电压有关。因此，液晶显示装置的亮度与各像素上的电压有关。通常人们将电压与穿透度之间的关系用伽马(Gamma)曲线来表示。
在现有技术中，Gamma电压通常以公共电压VCOM分为两组，其中，大于公共电压VCOM的为正Gamma电压组，小于公共电压VCOM的负Gamma 电压组。液晶显示装置以公共电压VCOM对称的这两组Gamma电压来显示的灰阶是一致的。图1是现有技术的液晶显示装置的架构示意图。参照图1，现有技术的液晶显示装置在进行显示时，伽马发生器150将其产生的正Gamma电压和负Gamma电压一次性全部提供给数据驱动器(Source IC)120，数据驱动器120会根据时序控制110器提供的极性翻转(POL)信号从伽马发生器150提供的正Gamma电压和负Gamma电压中选择对应的Gamma电压，并利用选择出的Gamma电压对数据模拟电压进行伽马校正，并将伽马校正后的数据模拟电压提供至液晶显示面板140，其中，所述数据模拟电压由数据驱动器120将其从时序控制器110接收到的视频数字信号(即图1中的数据信号)转换而成。
为了将所有的Gamma电压输送至数据驱动器120，连接至数据驱动器120的走线较多，以正Gamma电压组具有10个正Gamma电压，负Gamma电压组具有10个负Gamma电压为例，伽马发生器150外部设定的记忆选择管脚至少需要具有20个，且连接至数据驱动器120的走线至少需20条，这将会造成驱动结构的复杂，增加液晶显示面板上的布线面积，不利于液晶显示装置的窄边框设计，并且走线数量较多，使得成本也会增加。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种液晶显示装置，包括伽马发生器及液晶显示面板，所述伽马发生器包括第一存储单元及第二存储单元；所述第一存储单元存储一组第一伽马电压值，所述第二存储单元存储一组第二伽马电压值；所述第一伽马电压值为正伽马电压值，所述第二伽马电压值为负伽马电压值；或者，所述第一伽马电压值为负伽马电压值，所述第二伽马电压值为正伽马电压值；所述伽马发生器基于极性翻转信号的控制，从所述第一存储单元中周期性地获取所述一组第一伽马电压值，或者从所述第二存储单元中周期性地获取所述一组第二伽马电压值；所述液晶显示面板基于所述一组第一伽马电压值和/或所述一组第二伽马电压值进行图像显示。
进一步地，所述第一存储单元还存储与所述一组第一伽马电压值对应的第一伽马值，所述第二存储单元还存储与所述一组第二伽马电压值对应的第二伽马值，其中，所述第一伽马值与所述第二伽马值相等。
进一步地，所述液晶显示装置还包括时序控制器，其中，所述时序控制器产生所述极性翻转信号。
进一步地，所述液晶显示装置还包括数据驱动器，其中，所述数据驱动器基于所述时序控制器提供的数字信号及所述伽马发生器提供的所述一组第一伽马电压值，或者基于所述时序控制器提供的数字信号及所述伽马发生器提供的所述一组第二伽马电压值得到所述液晶显示面板上各像素的电压值，并将所述各像素的电压值发送至所述液晶显示面板上。
进一步地，所述伽马发生器为可编程伽马发生器。
进一步地，所述第一存储单元及所述第二存储单元均为非易失性存储单元。
本发明的另一目的还在于提供一种液晶显示装置的驱动方法，包括：基于极性翻转信号的控制，周期性地获取一组第一伽马电压值或者一组第二伽马电压值；基于所述一组第一伽马电压值和/或所述一组第二伽马电压值进行图像显示；其中，所述第一伽马电压值为正伽马电压值，所述第二伽马电压值为负伽马电压值；或者，所述第一伽马电压值为负伽马电压值，所述第二伽马电压值为正伽马电压值。
进一步地，所述一组第一伽马电压值对应一第一伽马值，所述一组第二伽马电压值对应一第二伽马值，其中，所述第一伽马值与所述第二伽马值相等。
进一步地，在所述周期性地获取一组第一伽马电压值或者一组第二伽马电压值之前，产生所述极性翻转信号。
进一步地，所述基于所述一组第一伽马电压值或者所述一组第二伽马电压值进行图像显示的具体方法为：利用所述一组第一伽马电压值或者所述一组第二伽马电压值对数据模拟电压进行伽马校正，以产生所述液晶显示装置的各像素的电压值，并将所述各像素的电压值提供给所述各像素。
本发明的液晶显示装置及其驱动方法，与现有技术相比，伽马发生器外部设定的记忆选择管脚数量减少，且连接至数据驱动器的走线也减少，有效地降低成本，同时简化液晶显示装置的驱动结构，减小液晶显示面板上的布线面积， 利于液晶显示装置的窄边框设计。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是现有技术的液晶显示装置的架构示意图；
图2是根据本发明的实施例的液晶显示装置的架构示意图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。
图2是根据本发明的实施例的液晶显示装置的架构示意图。
参照图2，根据本发明的实施例的液晶显示装置包括：时序控制器10、数据驱动器20、扫描驱动器30、液晶显示面板40和伽马发生器50。
时序控制器10用于产生极性翻转(POL)信号，并将该POL信号提供给伽马(Gamma)发生器50。在根据本发明的实施例中，优选的，伽马发生器50为可编程伽马发生器。
伽马发生器50包括第一存储单元51、第二存储单元52及用于接收来自时序控制器10提供的POL信号的硬件端口BANK_SEL。
第一存储单元51优选为非易失性存储单元，其存储一组第一伽马电压值及与该一组第一伽马电压值对应的第一伽马值，其中，该一组第一伽马电压值包括多个第一伽马电压值(例如包括10个第一伽马电压值)。在本实施例中，第一伽马值可为2.2，但本发明不局限于此。
第二存储单元52优选为非易失性存储单元，其存储一组第二伽马电压值 及与该一组第二伽马电压值对应的第二伽马值，其中，该一组第二伽马电压值包括多个第二伽马电压值(例如包括10个第二伽马电压值)。在本实施例中，第二伽马值可为2.2，但本发明不局限于此。换句话讲，第二伽马值与第一伽马值相等。
在根据本发明的实施例中，第一伽马电压值为正伽马电压值，第二伽马电压值为负伽马电压值。应当理解的是，作为本发明的其他实施方式，第一伽马电压值为负伽马电压值，第二伽马电压值为正伽马电压值。
伽马发生器50基于POL信号的控制，从第一存储单元51中周期性地获取一组第一伽马电压值，或者从第二存储单元52中周期性地获取所述一组第二伽马电压值。
具体地，伽马发生器50通过其硬件端口BANK_SEL接收来自时序控制器10提供的POL信号，其中，在该POL信号为高电平时，获取第一存储单元51中的第一伽马值，再根据该第一伽马值得到一组第一伽马电压值；而在伽马发生器50的硬件端口BANK_SEL接收的POL信号为低电平时，获取第二存储单元52中的第二伽马值，再根据该第二伽马值得到一组第二伽马电压值。应当理解的是，作为本发明的其他实施方式，在伽马发生器50的硬件端口BANK_SEL接收的POL信号为低电平时，则获取第一存储单元51中的第一伽马值；而在伽马发生器50的硬件端口BANK_SEL接收的POL信号为高电平时，则获取第二存储单元52中的第二伽马值。
当根据本发明的实施例的液晶显示装置以帧反转对像素进行驱动时，POL信号的周期为画面刷新周期的一倍，也就是说，POL信号为高电平时，画面显示一帧；而POL信号为低电平时，画面显示另一帧。时序控制器10控制数据驱动器20，并向数据驱动器20提供视频数字信号(即图2所示的数据信号)。数据驱动器20接收来自时序控制器10提供的视频数字信号，并将该视频数字信号转换为数据模拟电压，同时数据驱动器20在POL信号为高电平时接收来自伽马发生器50提供的一组第一伽马电压值，并利用该一组第一伽马电压值对数据模拟电压进行伽马校正，以产生液晶显示面板上的各像素的电压值；或者数据驱动器20在POL信号为低电平时接收来自伽马发生器50提供的一组第二伽马电压值，并利用该一组第二伽马电压值对数据模拟电压进行伽马校 正，以产生液晶显示面板上的各像素的电压值。
当根据本发明的实施例的液晶显示装置以行反转、列反转或点反转对像素进行驱动时，POL信号的周期与画面刷新周期相同，也就是说，POL信号的高电平持续的时间与POL信号的低电平持续的时间与画面显示一帧的时间相同。数据驱动器20接收来自时序控制器10提供的视频数字信号，并将该视频数字信号转换为数据模拟电压，同时数据驱动器20在POL信号为高电平时接收来自伽马发生器50提供的一组第一伽马电压值，并利用该一组第一伽马电压值对数据模拟电压进行伽马校正，以产生液晶显示面板上的正极性像素的电压值，并且数据驱动器20在POL信号为低电平时接收来自伽马发生器50提供的一组第二伽马电压值，并利用该一组第二伽马电压值对数据模拟电压进行伽马校正，以产生液晶显示面板上的负极性像素的电压值。
例如，当液晶现显示装置显示一帧画面时，图1所示的现有技术的伽马发生器150需要将其产生的20个伽马电压(其中，正伽马电压为10个，负伽马电压为10个)同时提供给数据驱动器120，其外部设定的记忆选择管脚至少需要具有20个，且连接至数据驱动器的走线至少需20条，而本发明的实施例的伽马发生器50根据POL信号为高电平或低电平，选择性地将10个正伽马电压或10个负伽马电压提供给数据驱动器20，其外部设定的记忆选择管脚只需要具有10个即可，0且连接至数据驱动器20的走线也减少为10条。
时序控制器10控制扫描驱动器30，配合每个帧显示的时机，设定水平扫描启动。扫描驱动器30接受时序控制器10的控制，循序地向液晶显示面板40上的扫描线(未示出)提供扫描信号。
液晶显示面板40接收来自数据驱动器20提供的各像素的电压值以及扫描驱动器30提供的扫描信号，并经由数据驱动器20提供的各像素的电压值和扫扫描驱动器30提供的扫描信号来显示影像。
综上所述，根据本发明的实施例，与现有技术相比，伽马发生器外部设定的记忆选择管脚数量减少，且连接至数据驱动器的走线也减少，有效地降低成本，同时简化液晶显示装置的驱动结构，减小液晶显示面板上的布线面积，利于液晶显示装置的窄边框设计。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (12)

  1. 一种液晶显示装置，包括伽马发生器及液晶显示面板，其中，所述伽马发生器包括第一存储单元及第二存储单元；所述第一存储单元存储一组第一伽马电压值，所述第二存储单元存储一组第二伽马电压值；
    所述第一伽马电压值为正伽马电压值，所述第二伽马电压值为负伽马电压值；或者，所述第一伽马电压值为负伽马电压值，所述第二伽马电压值为正伽马电压值；
    所述伽马发生器基于极性翻转信号的控制，从所述第一存储单元中周期性地获取所述一组第一伽马电压值，或者从所述第二存储单元中周期性地获取所述一组第二伽马电压值；
    所述液晶显示面板基于所述一组第一伽马电压值和/或所述一组第二伽马电压值进行图像显示。
  2. 根据权利要求1所述的液晶显示装置，其中，所述第一存储单元还存储与所述一组第一伽马电压值对应的第一伽马值，所述第二存储单元还存储与所述一组第二伽马电压值对应的第二伽马值，其中，所述第一伽马值与所述第二伽马值相等。
  3. 根据权利要求1所述的液晶显示装置，其中，所述液晶显示装置还包括时序控制器，其中，所述时序控制器产生所述极性翻转信号。
  4. 根据权利要求2所述的液晶显示装置，其中，所述液晶显示装置还包括时序控制器，其中，所述时序控制器产生所述极性翻转信号。
  5. 根据权利要求3所述的液晶显示装置，其中，所述液晶显示装置还包括数据驱动器，其中，所述数据驱动器基于所述时序控制器提供的数字信号及所述伽马发生器提供的所述一组第一伽马电压值，或者基于所述时序控制器提供的数字信号及所述伽马发生器提供的所述一组第二伽马电压值得到所述液晶显示面板上各像素的电压值，并将所述各像素的电压值发送至所述液晶显示面板上。
  6. 根据权利要求1所述的液晶显示装置，其中，所述伽马发生器为可编程伽马发生器。
  7. 根据权利要求1所述的液晶显示装置，其中，所述第一存储单元及所述第二存储单元均为非易失性存储单元。
  8. 一种液晶显示装置的驱动方法，其中，包括：
    基于极性翻转信号的控制，周期性地获取一组第一伽马电压值或者一组第二伽马电压值；
    基于所述一组第一伽马电压值和/或所述一组第二伽马电压值进行图像显示；
    其中，所述第一伽马电压值为正伽马电压值，所述第二伽马电压值为负伽马电压值；或者，所述第一伽马电压值为负伽马电压值，所述第二伽马电压值为正伽马电压值。
  9. 根据权利要求8所述的驱动方法，其中，所述一组第一伽马电压值对应一第一伽马值，所述一组第二伽马电压值对应一第二伽马值，其中，所述第一伽马值与所述第二伽马值相等。
  10. 根据权利要求8所述的驱动方法，其中，在所述周期性地获取一组第一伽马电压值或者一组第二伽马电压值之前，产生所述极性翻转信号。
  11. 根据权利要求9所述的驱动方法，其中，在所述周期性地获取一组第一伽马电压值或者一组第二伽马电压值之前，产生所述极性翻转信号。
  12. 根据权利要求8所述的驱动方法，其中，所述基于所述一组第一伽马电压值和/或所述一组第二伽马电压值进行图像显示的具体方法为：利用所述一组第一伽马电压值和/或所述一组第二伽马电压值对数据模拟电压进行伽马校正，以产生所述液晶显示装置的各像素的电压值，并将所述各像素的电压值提供给所述各像素。
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105741805B (zh) * 2016-04-19 2019-03-19 深圳市华星光电技术有限公司 液晶显示器的驱动系统及驱动方法、液晶显示器
KR102552804B1 (ko) * 2018-07-25 2023-07-10 삼성디스플레이 주식회사 표시 장치 및 이의 구동 방법
CN108877728A (zh) * 2018-09-11 2018-11-23 惠科股份有限公司 显示装置及其驱动方法
CN109147706A (zh) * 2018-09-30 2019-01-04 惠科股份有限公司 驱动电路及方法、显示面板及显示装置
CN111091790B (zh) * 2018-10-23 2022-03-15 深圳天德钰科技股份有限公司 时序控制器及具有时序控制器的液晶显示装置
CN114023283B (zh) * 2021-11-29 2024-02-09 京东方科技集团股份有限公司 一种显示驱动模组、显示装置和显示驱动方法
CN115938306B (zh) * 2023-02-21 2023-10-27 惠科股份有限公司 伽马电压发生器、显示装置及显示面板的驱动方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1396580A (zh) * 2001-07-06 2003-02-12 日本电气株式会社 驱动电路和液晶显示装置
CN1477614A (zh) * 2002-08-22 2004-02-25 Nec液晶技术株式会社 液晶显示器驱动方法、液晶显示器件和设有该液晶显示器件的监视器
CN101071213A (zh) * 2006-05-11 2007-11-14 Nec显示器解决方案株式会社 液晶显示设备以及液晶面板驱动方法
KR20080034573A (ko) * 2006-10-17 2008-04-22 엘지.필립스 엘시디 주식회사 액정표시장치의 구동회로 및 이의 구동방법
KR20090058055A (ko) * 2007-12-04 2009-06-09 엘지디스플레이 주식회사 구동회로 및 이를 포함하는 액정표시장치

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69027136T2 (de) * 1989-02-10 1996-10-24 Sharp Kk Flüssigkristallanzeigeeinheit und Steuerverfahren dafür
JP2001054134A (ja) * 1999-08-11 2001-02-23 Casio Comput Co Ltd ビデオエンコーダ回路
JP2003015612A (ja) * 2001-06-29 2003-01-17 Nec Corp 液晶ディスプレイの駆動方法、液晶表示装置及びモニタ
US7724228B2 (en) * 2004-11-29 2010-05-25 Lg Display Co., Ltd. Liquid crystal display device and driving method thereof
KR101117981B1 (ko) * 2005-05-12 2012-03-06 엘지디스플레이 주식회사 데이터 드라이버 및 이를 이용한 액정 표시장치
US20070001964A1 (en) * 2005-06-30 2007-01-04 Lg.Philips Lcd Co., Ltd. Display device and method of driving the same
JP2009186911A (ja) * 2008-02-08 2009-08-20 Rohm Co Ltd ソースドライバ
KR101056231B1 (ko) * 2009-03-27 2011-08-11 삼성모바일디스플레이주식회사 유기전계발광표시장치
CN101996592A (zh) * 2009-08-13 2011-03-30 联咏科技股份有限公司 源极驱动器
KR101308478B1 (ko) * 2010-12-24 2013-09-16 엘지디스플레이 주식회사 액정표시장치 및 그의 구동 방법
CN102237066A (zh) * 2011-08-18 2011-11-09 青岛海信电器股份有限公司 一种液晶显示器及提高图像对比度的方法
CN102760398B (zh) * 2012-07-03 2014-12-10 京东方科技集团股份有限公司 伽码电压产生装置和方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1396580A (zh) * 2001-07-06 2003-02-12 日本电气株式会社 驱动电路和液晶显示装置
CN1477614A (zh) * 2002-08-22 2004-02-25 Nec液晶技术株式会社 液晶显示器驱动方法、液晶显示器件和设有该液晶显示器件的监视器
CN101071213A (zh) * 2006-05-11 2007-11-14 Nec显示器解决方案株式会社 液晶显示设备以及液晶面板驱动方法
KR20080034573A (ko) * 2006-10-17 2008-04-22 엘지.필립스 엘시디 주식회사 액정표시장치의 구동회로 및 이의 구동방법
KR20090058055A (ko) * 2007-12-04 2009-06-09 엘지디스플레이 주식회사 구동회로 및 이를 포함하는 액정표시장치

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