WO2020107659A1 - 液晶面板驱动方法 - Google Patents

液晶面板驱动方法 Download PDF

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Publication number
WO2020107659A1
WO2020107659A1 PCT/CN2019/070907 CN2019070907W WO2020107659A1 WO 2020107659 A1 WO2020107659 A1 WO 2020107659A1 CN 2019070907 W CN2019070907 W CN 2019070907W WO 2020107659 A1 WO2020107659 A1 WO 2020107659A1
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overvoltage
liquid crystal
frame picture
crystal panel
gray scale
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French (fr)
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何涛
吴宇
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Shenzhen China Star Optoelectronics Semiconductor Display Technology Co Ltd
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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
    • G09G3/3696—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
    • 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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • 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 relates to the field of display technology, and in particular to a driving method of a liquid crystal panel.
  • Thin film transistor Thin Film Transistor, TFT is the main driving element in the current liquid crystal display device (Liquid Crystal Display) and active matrix driven organic electroluminescence display device (Active Matrix Organic Light-Emitting Diode, AMOLED), It is directly related to the display performance of the flat panel display device.
  • liquid crystal displays which include a liquid crystal display panel and a backlight module.
  • the working principle of the liquid crystal display panel is to infuse liquid crystal molecules between the thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate) and the color filter (CF) substrate, and apply them separately on the two substrates
  • the pixel voltage and the common voltage control the rotation direction of the liquid crystal molecules by the electric field formed between the pixel voltage and the common voltage, so as to transmit the light of the backlight module to generate a picture.
  • Overdrive is an important technology to improve the dynamic response quality of LCD panels.
  • the principle is to insert a frame Z'signal in the middle when the signal changes from X'to Y', and use the signal pressure difference between X'and Z'to overdrive the liquid crystal molecules to quickly rotate.
  • the frame of Z' is After the time is over, the liquid crystal molecules rotate exactly to the angle required by the Y'signal, and the signal pressure difference between X'and Z'is called the OD value.
  • the gray scale is used to correspond to the signal voltage, and the system will look up the corresponding OD value in the OD lookup table according to the gray scale values of X'and Y'.
  • a threshold m' is usually set, when the absolute value of the difference between the gray level of X'and the gray level of Y'is less than or equal to the threshold m'(that is, the gray level and Y'of X'in FIG.
  • the point corresponding to the gray level of is located in the area enclosed by the two dotted lines), without OD compensation, and directly output the voltage value corresponding to the gray level of Y'; when the difference between the gray level of X'and the gray level of Y'
  • the absolute value of the value is greater than the threshold value m'(that is, the points corresponding to the gray level of X'and the gray level of Y'in Figure 1 are outside the area enclosed by two dashed lines)
  • OD compensation is performed and the gray level of Y'is output
  • the corresponding OD value for example, the threshold m'is 10, the gray level of X'is 60, and the gray level of Y'is 72, through linear interpolation of the OD values of the four points D', E', G'and H'
  • the OD value corresponding to the gray scale of Y'is calculated.
  • An object of the present invention is to provide a driving method of a liquid crystal panel, which can avoid the occurrence of faults when the gray level of the current frame image jumps to the gray level of the next frame image, thereby avoiding abnormal display of the panel image.
  • the present invention provides a method for driving a liquid crystal panel, including the following steps:
  • Step S1 Provide an overvoltage compensation lookup table; the overvoltage compensation lookup table includes the grayscale of the current frame picture, the grayscale of the next frame picture, and the grayscale of the current frame picture corresponding to the grayscale of the next frame picture.
  • Drive value the grayscale of the current frame picture, the grayscale of the next frame picture, and the grayscale of the current frame picture corresponding to the grayscale of the next frame picture.
  • Step S2 When
  • ⁇ Z, output the voltage value corresponding to the gray scale of the next frame to the LCD panel;
  • X n is the gray scale of the current frame
  • X n+1 Is the gray scale of the next frame picture
  • is the absolute value of the difference between the gray scale of the current frame picture and the gray scale of the next frame picture
  • Z is the preset first threshold
  • the voltage value corresponding to the gray scale is provided by the Gamma module connected to the LCD panel.
  • the first region (10) formed in the overvoltage compensation lookup table is located on both sides of the diagonal.
  • the second region (20) formed in the overvoltage compensation lookup table is located on both sides of the first region (10).
  • the N is 32 and the M is 9.
  • the N is 16, and the M is 17.
  • OD(X n , X n+1 ) is an adjustable value .
  • the invention also provides a driving method of a liquid crystal panel, including the following steps:
  • Step S1 Provide an overvoltage compensation lookup table; the overvoltage compensation lookup table includes the grayscale of the current frame picture, the grayscale of the next frame picture, and the grayscale of the current frame picture corresponding to the grayscale of the next frame picture.
  • Drive value the grayscale of the current frame picture, the grayscale of the next frame picture, and the grayscale of the current frame picture corresponding to the grayscale of the next frame picture.
  • Step S2 When
  • ⁇ Z, output the voltage value corresponding to the gray scale of the next frame to the LCD panel;
  • X n is the gray scale of the current frame
  • X n+1 Is the gray scale of the next frame picture
  • is the absolute value of the difference between the gray scale of the current frame picture and the gray scale of the next frame picture
  • Z is the preset first threshold
  • the voltage value corresponding to the gray scale is provided by the Gamma module connected to the liquid crystal panel;
  • the liquid crystal panel driving method of the present invention outputs the voltage value corresponding to the gray scale of the next frame to the liquid crystal panel when
  • ⁇ Z; when Z ⁇
  • >W output the gray scale of the current frame and the next frame
  • the overvoltage driving value corresponding to the gray scale is applied to the liquid crystal panel, which can avoid the occurrence of faults when the gray scale of the current frame image
  • FIG. 1 is a schematic diagram of a conventional driving method of a liquid crystal panel
  • FIG. 3 is a schematic diagram of a driving method of a liquid crystal panel of the present invention.
  • the present invention provides a driving method of a liquid crystal panel, which includes the following steps:
  • Step S1 Provide an overvoltage compensation lookup table; the overvoltage compensation lookup table includes the grayscale of the current frame picture, the grayscale of the next frame picture, and the grayscale of the current frame picture corresponding to the grayscale of the next frame picture.
  • Drive value the grayscale of the current frame picture, the grayscale of the next frame picture, and the grayscale of the current frame picture corresponding to the grayscale of the next frame picture.
  • Step S2 When
  • ⁇ Z, output the voltage value corresponding to the gray scale of the next frame to the LCD panel;
  • X n is the gray scale of the current frame
  • X n+1 Is the gray scale of the next frame picture
  • is the absolute value of the difference between the gray scale of the current frame picture and the gray scale of the next frame picture
  • Z is the preset first threshold
  • the voltage value corresponding to the gray scale is provided by the Gamma module connected to the liquid crystal panel.
  • the N is 32 and the M is 9, that is, the overvoltage compensation lookup table is 9*9 in size, and the display screen is divided into 256 gray levels, and each 32 gray levels is a unit,
  • the abscissa is X n and the ordinate is X n+1 .
  • Both X n and X n+1 have 9 values, which are 0, 32, 64, 96 alone; point A represents the current frame picture.
  • the gray level is 32 and the overvoltage driving value OD(32, 32) corresponding to the gray level of the next frame is 32.
  • Point B indicates that the gray level of the current frame is 64 and the gray level of the next frame is 32 Overvoltage driving value OD (64, 32), and so on, point I represents the overvoltage driving value OD (96, 96) corresponding to the gray scale of the current frame picture is 96 and the gray scale of the next frame picture is 96.
  • the gray scale X n of the current frame picture is 34
  • the gray scale X n+1 of the next frame picture is 60
  • the overvoltage driving value OD(34, 60) passes OD(32, 32), OD(64, 32) , OD (32, 64) and OD (64, 64) are obtained by linear interpolation of four overvoltage drive values.
  • the liquid crystal panel driving method of the present invention outputs the voltage value corresponding to the gray scale of the next frame of the picture to the liquid crystal panel when
  • ⁇ Z; when Z ⁇
  • > W the gray scale of the current frame of picture and the gray of the next frame of picture are output
  • the overvoltage driving value corresponding to the level is applied to the liquid crystal panel, which can avoid the occurrence of faults when the

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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)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种液晶面板驱动方法。通过在|X n-X n+1|＜＝Z时，输出下一帧画面的灰阶对应的电压值到液晶面板；在Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，在|X n-X n+1|＞W时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值到液晶面板，可以避免当前帧画面的灰阶跳变到下一帧画面的灰阶时出现断层，从而避免面板画面显示异常。

Description

液晶面板驱动方法 技术领域
本发明涉及显示技术领域，尤其涉及一种液晶面板驱动方法。
背景技术
薄膜晶体管(Thin Film Transistor，TFT)是目前液晶显示装置(Liquid Crystal Display，LCD)和有源矩阵驱动式有机电致发光显示装置(Active Matrix Organic Light-Emitting Diode，AMOLED)中的主要驱动元件，直接关系平板显示装置的显示性能。
现有市场上的液晶显示器大部分为背光型液晶显示器，其包括液晶显示面板及背光模组(backlight module)。液晶显示面板的工作原理是在薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)与彩色滤光片(Color Filter，CF)基板之间灌入液晶分子，并在两片基板上分别施加像素电压和公共电压，通过像素电压和公共电压之间形成的电场控制液晶分子的旋转方向，以将背光模组的光线透射出来产生画面。
过压驱动(Over Drive，OD)是提高液晶面板动态响应品质的一项重要技术。其原理是在信号由X’变到Y’时，在中间插入一帧(Frame)Z’信号，利用X’、Z’之间信号压差过驱动液晶分子快速转动，当Z’的一帧时间结束之后，液晶分子恰好转动到Y’信号所需要的角度,则X’、Z’之间信号压差被称为OD值。LCD的驱动电路中，用灰阶来对应信号电压，系统会根据X’和Y’的灰阶值在OD查找表中查找对应的OD值。当前大多数系统采用8bit的颜色深度，X’、Y’都有256阶，那么OD查找表的容量就需要256*256*8bit。大多数的LCD驱动电路不会使用这么大空间的ROM来存储OD查找表，而是采用9*9*8bit或者17*17*8bit的OD查找表。请参阅图1，在9*9*8bit的OD查找表中，X’和Y’都是每隔32阶取值，并填入对应的OD值(即图2中的A’、B’、C’.....H’、I’等等)，而中间灰阶的OD值则由周围4个OD值来做线性内插计算出来。
现有技术中通常设定一个阈值m’，当X’的灰阶与Y’的灰阶的差值的绝对值小于或等于阈值m’时(即图1中X’的灰阶与Y’的灰阶对应的点位于两条虚线围成的区域中)，不进行OD补偿，而直接输出Y’的灰阶所对应的电压值；当X’的灰阶与Y’的灰阶的差值的绝对值大于阈值m’时(即图1中X’的灰阶与Y’的灰阶对应的点位于两条虚线围成的区域 之外)，进行OD补偿，输出Y’的灰阶所对应的OD值，例如阈值m’为10，X’的灰阶为60，Y’的灰阶为72，通过D’、E’、G’和H’四个点的OD值线性内插计算得到Y’的灰阶所对应的OD值。
但是当X’的灰阶与Y’的灰阶的差值刚好处于阈值m’过渡的位置，即X’的灰阶与Y’的灰阶的差值等于阈值m’，由于进行OD补偿与不进行OD补偿的灰阶差异较大，导致X’的灰阶跳变到Y’的灰阶时出现断层，进而导致面板画面显示异常。
发明内容
本发明的目的在于提供一种液晶面板驱动方法，可以避免当前帧画面的灰阶跳变到下一帧画面的灰阶时出现断层，从而避免面板画面显示异常。
为实现上述目的，本发明提供了一种液晶面板驱动方法，包括如下步骤：
步骤S1、提供过压补偿查找表；所述过压补偿查找表包括当前帧画面的灰阶、下一帧画面的灰阶以及当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值；
步骤S2、当|X n-X n+1|＜＝Z时，输出下一帧画面的灰阶对应的电压值到液晶面板；其中，X n为当前帧画面的灰阶，X n+1为下一帧画面的灰阶，|X n-X n+1|为当前帧画面的灰阶与下一帧画面的灰阶的差值的绝对值，Z为预设的第一阈值；
当Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，其中，W为预设的第二阈值，OD_t为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值，ra为权重，OD(X n，X n+1)为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值，V n+1为下一帧画面的灰阶对应的电压值；
当|X n-X n+1|＞W时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值到液晶面板。
灰阶对应的电压值由与液晶面板连接的Gamma模块提供。
所述过压补偿查找表还包括一函数为X n＝X n+1形成的对角线。
|X n-X n+1|＜＝Z在过压补偿查找表中所形成的第一区域(10)位于对角线的两侧。
Z＜|X n-X n+1|＜＝W在过压补偿查找表中所形成的第二区域(20)位于第一区域(10)的两侧。
所述过压补偿查找表为M*M大小且以N个灰阶为一个单位,设N，M均为整数，且N>＝2，M>＝2。
所述N为32，所述M为9。
所述N为16，所述M为17。
设X n＝L*N，X n+1＝K*N，其中，L和K均为0至M-1中的任一整数，则OD(X n，X n+1)为可调值。
设P*N<X n<(P+1)*N，P*N<X n+1<(P+1)*N，其中，P为0至M-1中的任一整数，则OD(X n，X n+1)通过OD(P*N，P*N)、OD((P+1)*N，P*N)、OD(P*N，(P+1)*N)及OD((P+1)*N，(P+1)*N)线性内插得到，
其中，OD(P*N，P*N)为X n＝P*N与X n+1＝P*N对应的过压驱动值；OD((P+1)*N，P*N)为X n＝(P+1)*N与X n+1＝P*N对应的过压驱动值；OD(P*N，(P+1)*N)为X n＝P*N与X n+1＝(P+1)*N对应的过压驱动值；OD((P+1)*N，(P+1)*N)为X n＝(P+1)*N与X n+1＝(P+1)*N对应的过压驱动值。
本发明还提供了一种液晶面板驱动方法，包括如下步骤：
步骤S1、提供过压补偿查找表；所述过压补偿查找表包括当前帧画面的灰阶、下一帧画面的灰阶以及当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值；
步骤S2、当|X n-X n+1|＜＝Z时，输出下一帧画面的灰阶对应的电压值到液晶面板；其中，X n为当前帧画面的灰阶，X n+1为下一帧画面的灰阶，|X n-X n+1|为当前帧画面的灰阶与下一帧画面的灰阶的差值的绝对值，Z为预设的第一阈值；
当Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面 的灰阶对应的过压驱动过渡值到液晶面板，其中，W为预设的第二阈值，OD_t为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值，ra为权重，OD(X n，X n+1)为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值，V n+1为下一帧画面的灰阶对应的电压值；
当|X n-X n+1|＞W时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值到液晶面板；
其中，灰阶对应的电压值由与液晶面板连接的Gamma模块提供；
其中，所述过压补偿查找表还包括一函数为X n＝X n+1形成的对角线。
本发明的有益效果：本发明的液晶面板驱动方法通过在|X n-X n+1|＜＝Z时，输出下一帧画面的灰阶对应的电压值到液晶面板；在Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，在|X n-X n+1|＞W时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值到液晶面板，可以避免当前帧画面的灰阶跳变到下一帧画面的灰阶时出现断层，从而避免面板画面显示异常。
附图说明
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
附图中，
图1为现有的的液晶面板驱动方法的示意图；
图2为本发明的液晶面板驱动方法的流程图；
图3为本发明的液晶面板驱动方法的示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图2，本发明提供一种液晶面板驱动方法，包括如下步骤：
步骤S1、提供过压补偿查找表；所述过压补偿查找表包括当前帧画面 的灰阶、下一帧画面的灰阶以及当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值；
步骤S2、当|X n-X n+1|＜＝Z时，输出下一帧画面的灰阶对应的电压值到液晶面板；其中，X n为当前帧画面的灰阶，X n+1为下一帧画面的灰阶，|X n-X n+1|为当前帧画面的灰阶与下一帧画面的灰阶的差值的绝对值，Z为预设的第一阈值；
当Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，其中，W为预设的第二阈值，OD_t为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值，ra为权重，OD(X n，X n+1)为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值，V n+1为下一帧画面的灰阶对应的电压值；
当|X n-X n+1|＞W时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值到液晶面板。
具体的，灰阶对应的电压值由与液晶面板连接的Gamma模块提供。
具体的，所述过压补偿查找表还包括一函数为X n＝X n+1形成的对角线。
进一步的，|X n-X n+1|＜＝Z在过压补偿查找表中所形成的第一区域10位于对角线的两侧。即X n与X n+1在过压补偿查找表中形成的坐标位于第一区域10中时，不进行过压补偿，而直接输出下一帧画面的灰阶对应的电压值到液晶面板。
进一步的，Z＜|X n-X n+1|＜＝W在过压补偿查找表中所形成的第二区域20位于第一区域10的两侧。即X n与X n+1在过压补偿查找表中形成的坐标位于第二区域20中时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，避免当前帧画面的灰阶跳变到下一帧画面的灰阶时出现断层，从而避免面板画面显示异常。
具体的，所述过压补偿查找表为M*M大小且以N个灰阶为一个单位，设N，M均为整数，且N>＝2，M>＝2。
具体的，请参阅图3，所述N为32，所述M为9，即过压补偿查找表 为9*9大小，将显示画面分为256灰阶，每32个灰阶为一个单位，横坐标为X n，纵坐标为X n+1，X n与X n+1均具有9个值，分别为0，32，64，96.....255；A点表示当前帧画面的灰阶为32与下一帧画面的灰阶为32对应的过压驱动值OD(32，32)，B点表示当前帧画面的灰阶为64与下一帧画面的灰阶为32对应的过压驱动值OD(64，32)，依次类推，I点表示当前帧画面的灰阶为96与下一帧画面的灰阶为96对应的过压驱动值OD(96，96)。
当然，本发明也可以将N设为16，M设为17，即过压补偿查找表为17*17大小，将显示画面分为256灰阶，每16个灰阶为一个单位，X n与X n+1均具有17个值，分别为0，16，32，48.....255。
具体的，设X n＝L*N，X n+1＝K*N，其中，L和K均为0至M-1中的任一整数，则OD(X n，X n+1)为可调值。即图3中所示的A点、B点、C点.....I点均为可调值。
具体的，设P*N<X n<(P+1)*N，P*N<X n+1<(P+1)*N，其中，P为0至M-1中的任一整数，则OD(X n，X n+1)通过OD(P*N，P*N)、OD((P+1)*N，P*N)、OD(P*N，(P+1)*N)及OD((P+1)*N，(P+1)*N)线性内插得到。
其中，OD(P*N，P*N)为X n＝P*N与X n+1＝P*N对应的过压驱动值；OD((P+1)*N，P*N)为X n＝(P+1)*N与X n+1＝P*N对应的过压驱动值；OD(P*N，(P+1)*N)为X n＝P*N与X n+1＝(P+1)*N对应的过压驱动值；OD((P+1)*N，(P+1)*N)为X n＝(P+1)*N与X n+1＝(P+1)*N对应的过压驱动值。
例如当前帧画面的灰阶X n为34，下一帧画面的灰阶X n+1为60，过压驱动值OD(34，60)通过OD(32，32)、OD(64，32)、OD(32，64)及OD(64，64)四个过压驱动值线性内插得到。
需要说明的是，本发明在当|X n-X n+1|＜＝Z时，不进行过压补偿，而直接输出下一帧画面的灰阶对应的电压值到液晶面板 ，可以防止|X n-X n+1|和|X n+1-X n+2|接近的时候，|X n+1-X n+2|为下一帧画面的灰阶与下两帧画面的灰阶的差值的绝对值，由于OD(X n，X n+1)和OD(X n+1，X n+2)分别通过不同的四个过压驱动值线性内插而导致OD(X n，X n+1)与OD(X n+1，X n+2)差异较大(例如OD(X n，X n+1)通过A、B、D、E线性内插得到，OD(X n+1，X n+2)通过D、E、G、H线性内插得到)，从而避免画面显示异常；接着， 通过设置一预设的第二阈值，当Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，避免当前帧画面的灰阶跳变到下一帧画面的灰阶时出现断层，从而避免面板画面显示异常。
综上所述，本发明的液晶面板驱动方法通过在|X n-X n+1|＜＝Z时，输出下一帧画面的灰阶对应的电压值到液晶面板；在Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，在|X n-X n+1|＞W时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值到液晶面板，可以避免当前帧画面的灰阶跳变到下一帧画面的灰阶时出现断层，从而避免面板画面显示异常。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (15)

  1. 一种液晶面板驱动方法，包括如下步骤：
    步骤S1、提供过压补偿查找表；所述过压补偿查找表包括当前帧画面的灰阶、下一帧画面的灰阶以及当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值；
    步骤S2、当|X n-X n+1|＜＝Z时，输出下一帧画面的灰阶对应的电压值到液晶面板；其中，X n为当前帧画面的灰阶，X n+1为下一帧画面的灰阶，|X n-X n+1|为当前帧画面的灰阶与下一帧画面的灰阶的差值的绝对值，Z为预设的第一阈值；
    当Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，其中，W为预设的第二阈值，OD_t为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值，ra为权重，OD(X n，X n+1)为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值，V n+1为下一帧画面的灰阶对应的电压值；
    当|X n-X n+1|＞W时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值到液晶面板。
  2. 如权利要求1所述的液晶面板驱动方法，其中，灰阶对应的电压值由与液晶面板连接的Gamma模块提供。
  3. 如权利要求1所述的液晶面板驱动方法，其中，所述过压补偿查找表还包括一函数为X n＝X n+1形成的对角线。
  4. 如权利要求3所述的液晶面板驱动方法，其中，|X n-X n+1|＜＝Z在过压补偿查找表中所形成的第一区域(10)位于对角线的两侧。
  5. 如权利要求4所述的液晶面板驱动方法，其中，Z＜|X n-X n+1|＜＝W在过压补偿查找表中所形成的第二区域(20)位于第一区域(10)的两侧。
  6. 如权利要求1所述的液晶面板驱动方法，其中，所述过压补偿查找 表为M*M大小且以N个灰阶为一个单位,设N，M均为整数，且N>＝2，M>＝2。
  7. 如权利要求6所述的液晶面板驱动方法，其中，所述N为32，所述M为9。
  8. 如权利要求6所述的液晶面板驱动方法，其中，所述N为16，所述M为17。
  9. 如权利要求6所述的液晶面板驱动方法，其中，设X n＝L*N，X n+1＝K*N，其中，L和K均为0至M-1中的任一整数，则OD(X n，X n+1)为可调值。
  10. 如权利要求6所述的液晶面板驱动方法，其中，设P*N<X n<(P+1)*N，P*N<X n+1<(P+1)*N，其中，P为0至M-1中的任一整数，则OD(X n，X n+1)通过OD(P*N，P*N)、OD((P+1)*N，P*N)、OD(P*N，(P+1)*N)及OD((P+1)*N，(P+1)*N)线性内插得到，
    其中，OD(P*N，P*N)为X n＝P*N与X n+1＝P*N对应的过压驱动值；OD((P+1)*N，P*N)为X n＝(P+1)*N与X n+1＝P*N对应的过压驱动值；OD(P*N，(P+1)*N)为X n＝P*N与X n+1＝(P+1)*N对应的过压驱动值；OD((P+1)*N，(P+1)*N)为X n＝(P+1)*N与X n+1＝(P+1)*N对应的过压驱动值。
  11. 一种液晶面板驱动方法，包括如下步骤：
    步骤S1、提供过压补偿查找表；所述过压补偿查找表包括当前帧画面的灰阶、下一帧画面的灰阶以及当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值；
    步骤S2、当|X n-X n+1|＜＝Z时，输出下一帧画面的灰阶对应的电压值到液晶面板；其中，X n为当前帧画面的灰阶，X n+1为下一帧画面的灰阶，|X n-X n+1|为当前帧画面的灰阶与下一帧画面的灰阶的差值的绝对值，Z为预设的第一阈值；
    当Z＜|X n-X n+1|＜＝W时，根据过压驱动过渡值的计算公式：OD_t＝ra*OD(X n，X n+1)+(1-ra)*V n+1输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值到液晶面板，其中，W为预设的第二阈值，OD_t为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动过渡值，ra为权重，OD(X n，X n+1)为当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值，V n+1为下一帧画面的灰阶对应的电压值；
    当|X n-X n+1|＞W时，输出当前帧画面的灰阶与下一帧画面的灰阶对应的过压驱动值到液晶面板；
    其中，灰阶对应的电压值由与液晶面板连接的Gamma模块提供；
    其中，所述过压补偿查找表还包括一函数为X n＝X n+1形成的对角线。
  12. 如权利要求11所述的液晶面板驱动方法，其中，|X n-X n+1|＜＝Z在过压补偿查找表中所形成的第一区域(10)位于对角线的两侧。
  13. 如权利要求12所述的液晶面板驱动方法，其中，Z＜|X n-X n+1|＜＝W在过压补偿查找表中所形成的第二区域(20)位于第一区域(10)的两侧。
  14. 如权利要求11所述的液晶面板驱动方法，其中，所述过压补偿查找表为M*M大小且以N个灰阶为一个单位,设N，M均为整数，且N>＝2，M>＝2。
  15. 如权利要求14所述的液晶面板驱动方法，其中，所述N为32，所述M为9。
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