WO2016000289A1 - 一种用于驱动hsd液晶显示面板的方法及装置 - Google Patents

一种用于驱动hsd液晶显示面板的方法及装置 Download PDF

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Publication number
WO2016000289A1
WO2016000289A1 PCT/CN2014/083236 CN2014083236W WO2016000289A1 WO 2016000289 A1 WO2016000289 A1 WO 2016000289A1 CN 2014083236 W CN2014083236 W CN 2014083236W WO 2016000289 A1 WO2016000289 A1 WO 2016000289A1
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liquid crystal
crystal display
square wave
wave data
data signal
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French (fr)
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姚晓慧
陈彩琴
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/417,383 priority Critical patent/US20160049125A1/en
Publication of WO2016000289A1 publication Critical patent/WO2016000289A1/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
    • G09G3/3696—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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • 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
    • G09G2330/027—Arrangements or methods related to powering off a display
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a driving method and an HSD liquid crystal display device for improving the display effect of a liquid crystal display panel of an HSD structure. Background technique
  • the HSD pixel array shares one data line by the left and right adjacent pixel units, so that the number of data lines is halved with respect to the number of data lines of the conventional liquid crystal driving pixel array.
  • Adjacent pixel cells of the same row are connected to different scan lines, and upper and lower adjacent pixel cells are connected to different scan lines, which doubles the number of scan lines relative to the number of scan lines of the conventional drive pixel array.
  • the number of pixel units connected to one scan line is reduced, and the time of scanning pulses allocated to the scan line is reduced, so that the charge B inch of the pixel unit is reduced, and the difference in pixel unit charging caused by the signal delay effect is significant.
  • the data line delay causes charging differences of pixel units on both sides of the same row of data lines, thereby causing display defects of vertical bright and dark lines.
  • the present invention provides a method for improving the display defects of vertical bright and dark lines of an HSD liquid crystal display panel.
  • a method for driving an HSD liquid crystal display panel with ⁇ comprising the following steps:
  • the polarity of the square wave data signal is controlled to be inverted once after three scan pulses by the first polarity inversion signal supplied from the timing control unit.
  • the odd-numbered machine line corresponds to the conduction of the TFT elements of the even-numbered column pixel unit
  • the even-numbered «line corresponds to the conduction of the TFT elements of the odd-numbered column unit
  • the second polarity inversion signal provided by the sequence control unit is such that the polarities of the square wave data signals on the data lines respectively corresponding to the odd column pixels and the even column pixels are in the same B inch. The opposite is true.
  • an HSD liquid crystal display device comprising: a liquid crystal display unit comprising: a pair of machine lines and a plurality of data lines, wherein adjacent pairs of gate lines and adjacent ones Two pixel units are disposed in the space of the data line package, and the data lines are respectively connected to the sources of the TFT elements on the adjacent two columns of pixel units;
  • a scan signal driving unit for supplying a sequence of scan pulse signals to the gate lines to respectively open TFT elements corresponding to each row of pixel units;
  • a data signal driving unit for supplying a square wave data signal to the data line to charge a pixel unit connected to a drain of the TFT element through the square wave data signal when the TFT element is turned on,
  • the polarity of the square wave data signal is inverted once every 2 ⁇ -H scan pulses, and n is an integer greater than or equal to 1.
  • the apparatus further includes a timing control unit configured to provide the data polarity driving unit with a first polarity inversion signal such that the polarity of the square wave data signal passes each time Reversed after the scan cycle.
  • the second polarity inversion signal provided by the B-sequence control unit is such that the polarities of the square wave data signals on the data lines corresponding to the odd-column pixels and the even-numbered columns respectively are at the same time. The opposite is true.
  • the machine line of the device is arranged such that the odd-numbered gate lines correspond to the conduction of the TFT elements controlling the even-numbered columns of pixels, and the even-numbered gate lines correspond to the conduction of the TFT elements that control the odd-numbered columns of pixels. .
  • the present invention reverses the polarity of each of the 211+1 scan pulses by setting the polarity of the square wave data signal, where n is an integer greater than or equal to 1, that is, the polarity of the square wave data signal is inverted every odd number of scan pulses.
  • FIG. 1 is a display diagram of a liquid crystal panel in which the polarity of a square wave data signal is inverted by two scanning periods;
  • FIG. 2 is a diagram showing an actual square wave data signal waveform and a polarity inversion relationship of a corresponding scanning pulse corresponding to the figure;
  • 3 is a light and dark display effect diagram corresponding to FIG. 1;
  • Figure 4 is a flow chart of the method of the present invention.
  • FIG. 5 is a diagram showing the relationship between the actual square wave data signal waveform and the polarity inversion relationship of the corresponding scan pulse corresponding to the polarity of the square wave data signal selected by the present invention
  • FIG. 6 is a liquid crystal panel display diagram corresponding to the polarity of the square wave data signal of FIG. 4 inverted by three scanning periods;
  • FIG. 7 is a light-dark display effect diagram corresponding to FIG. 5;
  • Fig. 8 is a structural diagram of an HSD liquid crystal display device corresponding to the method. detailed description
  • the steps illustrated in the flowchart of the Pf diagram may be performed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, The steps shown or described are performed differently than the order herein.
  • the pixel unit in the panel is controlled by the scan driving unit control gate line and the data driving unit control data line.
  • the principle of generating a vertical bright and dark line of a TFT-LCD display panel will be described by taking a square wave data signal inverted by two scanning pulses as an example.
  • FIG. 1 is a schematic diagram of a pixel array of a TFT-LCD display panel of an HSD structure, and the behavior marked by G Scan lines, columns marked with D are data lines.
  • the area surrounded by the scan line and the data line is a pixel area.
  • the pixel cells in the figure are represented by Pxy, where X represents the Xth row and y represents the yth column.
  • the driving order of the scan pulse is to drive the even-numbered column pixel unit on the data line side first, and then drive the odd-numbered column pixel unit on the other side of the data line.
  • the polarity inversion result of the wave data signal above the data line is marked with ⁇ + and one in FIG.
  • the data signal on the data line is reversed in polarity, the data signal needs to undergo a change process to reach a stable value.
  • the data line 1) 2 in Fig. 1 as an example, the pixel units PI 2, P13, P22, and P23 on both sides of D2 are sequentially driven.
  • the actual square wave data signal waveform and the polarity inversion relationship of the corresponding scan pulse are shown in Fig. 2.
  • the POL is a polarity inversion control signal for controlling the polarity of the square wave data signal to be inverted.
  • the square wave data signal voltage on D2 does not reach the specified voltage, so that the even-numbered column pixel unit P12 corresponding to D2 in the G1 scan pulse is undercharged.
  • the square wave data signal voltage on D2 reaches a specified voltage, so that the odd-numbered column pixel cells P13 corresponding to D2 are fully charged in the G2 scan pulse. This causes the pixel unit P12 to be lower in brightness than the pixel unit P13.
  • the polarity of the square wave data signal on D2 is reversed, and the scan line drive order is unchanged.
  • the square wave data signal voltage on D2 does not reach the specified voltage, so that the even-numbered column pixel unit P22 corresponding to D2 is insufficiently charged in the scan pulse of G3.
  • the G4 scan pulse arrives, the square wave data signal voltage on D2 reaches a specified voltage, so that the odd-numbered column pixel unit P23 corresponding to D2 is fully charged in the G4 scan pulse. This causes the pixel unit P22 to be lower in brightness than the pixel unit P23.
  • the even-numbered column pixel units P12 and P22 have lower luminance than the pixel units P13 and P23 of the odd-numbered columns.
  • the even-numbered column pixel units are undercharged, so that the even-numbered columns and the odd-numbered columns as a whole appear to be vertical dark lines.
  • Corresponding to other data lines also have the same display defects, as shown in Figure 3, so that the entire LCD panel appears as a picture of alternating bright and dark lines.
  • the present invention provides an improved HSD liquid crystal panel driving method.
  • the scan driving unit supplies a sequence of scan pulse signals to the gate lines of the liquid crystal display panel to respectively open the TFT elements corresponding to the pixel units of each row.
  • the data driving unit supplies a square wave data signal to the data line of the liquid crystal display panel, and the TFT element is turned on, and the square wave data signal is charged to the pixel unit connected to the drain of the TFT element.
  • the first polarity inversion signal is provided by the sequence control unit to control the polarity of the square wave data signal to be inverted once after 2n scan pulses, wherein n is set to an integer greater than or equal to one.
  • the timing control unit further provides a second polarity inversion signal such that the polarities of the square wave data signals on the data lines respectively corresponding to the odd column pixels and the even column pixels are opposite at the same time.
  • Control even-numbered column pixel units corresponding to gate lines with odd-numbered numbers The TFT elements are turned on, and the even-numbered gate lines correspond to the conduction of the TFT elements that control the odd-numbered column pixel units.
  • the polarity inversion relationship between the square wave data signal waveform and the corresponding scan pulse is shown in Fig. 5.
  • the scan pulse sequentially turns on to charge the pixel units on both sides of D2, and the pixel units P12, P13, ⁇ 22, ⁇ 23, ⁇ 32, ⁇ 33 on both sides of D2 are sequentially driven.
  • the polarity inversion result of the wave data signal above the data line is marked as + and one in the figure.
  • the first polarity inversion signal is sent by the sequence control unit so that the polarity of the data signal of D2 is reversed, and the driving order of the scan pulse is unchanged.
  • the voltage signal on D2 does not reach the specified voltage, so that the even-numbered column pixel unit P23 corresponding to D2 is undercharged during the scan period of G4.
  • the voltage on D2 reaches the specified voltage ii, and the even-numbered column pixel unit P33 corresponding to D2 in the G6 scan period is fully charged.
  • the voltage signal voltage on D2 is in the middle state of the voltage corresponding to G4 and G6, and the charging degree of the odd-numbered column pixel unit P32 corresponding to 1)2 in the G5 scan period is between P23 and P33. in the middle. This makes the luminance relationship of the pixels P23 ⁇ P32 ⁇ P33.
  • an HSD liquid crystal display device which achieves the above-described improvement of vertical bright and dark line display defects includes the following components.
  • a liquid crystal display unit comprising a plurality of pairs of gate lines and a plurality of data lines. Two pixel units are disposed in a spatial region surrounded by adjacent gate line pairs and adjacent data lines. The data lines are respectively connected to the sources of the TFT elements on the adjacent two columns of pixel units.
  • the odd-numbered yang line is set to control the conduction of the TFT elements corresponding to the even-numbered column pixel units on the liquid crystal display panel, and the even-numbered gate lines are arranged to control the conduction of the TFT elements corresponding to the odd-numbered column pixel units.
  • Scanning signal driving unit for providing a sequence of scan pulse signals to the «line to open each line separately A TFT element corresponding to a pixel unit.
  • a data signal driving unit for providing a square wave data signal for 1 data line When the TFT element is turned on, the square wave data signal charges the pixel unit connected to the drain of the TFT element.
  • the polarity of the square wave data signal is inverted once every 211+1 scan pulses, and II is an integer greater than or equal to 1, that is, the polarity of the square wave data signal is inverted once every odd number of scan pulses.
  • the HSD liquid crystal display device may further include a timing control unit.
  • the timing control unit is configured to provide timing control signals to the scan driving unit and the data driving unit.
  • Two polarity inversion signals are included in the provided timing spike signal.
  • the first polarity inversion signal is used to control the polarity of the square wave data signal on the data line to be inverted once every three scanning periods, and the second polarity inversion signal is used to control the odd column pixels on the liquid crystal panel.
  • the polarities of the square wave data signals on the data lines respectively corresponding to the cells and the even-numbered column pixel units are opposite at the same time.
  • the timing control unit can issue a polarity inversion control signal to the data driving unit every 2n+1 scan pulses, n being an integer greater than or equal to 1, such that the polarity of the square wave data signal It is inverted once every odd number of scan pulses, thus eliminating, for example, uneven brightness in the vertical direction.
  • n is an integer greater than or equal to 1, such that the polarity of the square wave data signal It is inverted once every odd number of scan pulses, thus eliminating, for example, uneven brightness in the vertical direction.
  • the value of n should not be too large, otherwise it will cause problems similar to the DC drive.

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

Abstract

一种用于驱动HSD液晶显示面板的方法，包括以下步骤：向所述液晶显示面板的栅线（G1、G2、G3、G4、G5、G6）提供一序列扫描脉冲信号，以分别打开每行像素单元（P12、P13、P22、P23、P32、P33）对应的TFT元件，向所述液晶显示面板的数据线（D1、D2、D3、D4、D5）提供方波数据信号，以在所述TFT元件打开时，通过所述方波数据信号向与所述TFT元件的漏极连接的像素单元（P12、P13、P22、P23、P32、P33）充电，其中，所述方波数据信号的极性每经过2n+1个扫描脉冲反转一次，其中n为大于或等于1的整数；对应本方法的一种装置包括液晶显示单元、扫描驱动单元、数据信号驱动单元和时序控制单元。本方法使得数据线（D1、D2、D3、D4、D5）两侧的亮暗不同的像素单元（P12、P13、P22、P23、P32、P33）交错位于该数据线（D1、D2、D3、D4、D5）的两侧，空间上亮暗不均的像素单元（P12、P13、P22、P23、P32、P33）交错排列，改善了面板上垂直亮暗线的显示缺陷。

Description

一种用于驱动 Bf SD液晶显示面板的方法及装置 相关申请的交叉引用
本申请要求享有 2014年 7 .月 4日提交的名称为"一种用于驱动 HSD液晶显示面板的 方法及装置"的中国专利申请 CN201410317749.9的优先权， 该申请的全部内容通过引用 并入本文中。 技术领域
本发明涉及液晶显示技术领域， 具体地说， 涉及一种改善 HSD结构液晶显示面板显 示效果的驱动方法及 HSD液晶显示装置。 背景技术
HSD 像素阵列通过左右相邻的像素单元共用一条数据线， 使得数据线的数目相对于 传统液晶驱动像素阵列的数据线数目减半。同一行的相邻像素单元连接不同的扫描线，上 下相邻的像素单元连接不同的扫描线，这就使得扫描线的数目相对于传统驱动像素阵列的 扫描线数目加倍。一条扫描线上连接的像素单元数减少，分配到扫描线上的扫描脉冲时间 减少，使得像素单元的充电 B寸间减少，由信号延迟效应导致的像素单元充电差异就会明显。 例如， 在 HSD结构的液晶显示面板中， 由于数据线两侧的像素单元驱动顺序不同， 数据 线延迟会造成同一行数据线两侧的像素单元的充电差异， 从而产生垂直亮暗线的显示缺 陷。
基于上述情况， 需要一种改善 HSD液晶显示面板垂直亮暗线显示缺陷的方法。 发明内容
为解决上述问题，本发明提供了一种改善 HSD液晶显示面板垂直亮暗线显示缺陷的 方法。
根据本发明的一个方面， 提供了一种用亍驱动 HSD液晶显示面板的方法， 包括以下 歩骤：
向所述液晶显示面板的機线提供一序列扫描脉冲信号，以分别打开每行像素单元对应 的 TFT元件； 向所述液晶显示面板的数据线提供方波数据信号， 以在所述 TFT元件打开时， 通过 所述方波数据信号 1 与所述 TFT元件的漏极连接的像素单元充电， 其中， 所述方波数据 信号的极性每经过 2n 个扫描脉冲反转一次， 其中 n为大于或等于 1的整数。
根据本发明的一个实施例，通过时序控制单元提供的第一极性反转信号来控制所述方 波数据信号的极性在经过 3个扫描脉冲后反转一次。
根据本发明的一个实施例， 奇数序号的機线对应控刺偶数列像素单元的 TFT元件的 导通， 偶数序号的 «线对应控制奇数列像素单元的 TFT元件的导通。
根据本发明的一个实施例，通过^序控制单元提供的第二极性反转信号，使得奇数列 像素与偶数列像素分别对应的数据线上的方波数据信号的极性在同一 B寸刻上是相反的。
根据本发明的另一个方面， 还提供了一种 HSD液晶显示装置， 包括- 液晶显示单元， 包括若千对機线和若千条数据线， 其中， 在相邻的栅线对和相邻的数 据线包圏的空间内设置两个像素单元， 所述数据线分别与相邻的两列像素单元上的 TFT 元件的源极连接；
扫描信号驱动单元，其用于向所述栅线提供一序列扫描脉冲信号， 以分别打开每行像 素单元对应的 TFT元件；
数据信号驱动单元， 其用于向所述数据线提供方波数据信号， 以在所述 TFT元件打 开^, 通过所述方波数据信号向与所述 TFT元件的漏极连接的像素单元充电， 其中， 所 述方波数据信号的极性每经过 2ιι- H个扫描脉冲反转一次， n为大于或等于 1的整数。
根据本发明的一个实施例，所述装置还包括时序控制单元，其用以向所述数据信号驱 动单元提供第一极性反转信号，使得所述方波数据信号的极性每经过≡个扫描周期后反转 一次。
根据本发明的一个实施例，通过 B寸序控制单元提供的第二极性反转信号，使得奇数列 像素与偶数列像素分别对应的数据线上的方波数据信号的极性在同一时刻上是相反的。
根据本发明的一个实施例，所述装置的機线设置成，奇数序号的栅线对应控制偶数列 像素的 TFT元件的导通， 偶数序号的栅线对应控制奇数列像素的 TFT元件的导通。
本发明带来了以下有益效果：
本发明通过设定方波数据信号的极性每经过 211+1个扫描脉冲反转一次， 其中 n为大 于或等于 1的整数， 即方波数据信号的极性每经过奇数个扫描脉冲反转一次，使得数据线 两侧的亮暗不同的像素单元交错位于该数据线的两侧，空间上亮暗不均的像素单元交错排 列， 改善了靣板上垂直亮暗线的显示缺陷。
本发明的其它特征和优点将在随后的说明书中阐述， 并且， 部分地从说明书中变得 显而易见， 或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利 要求书以及附图中所特别指出的结构来实现和获得。 f†图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实施例或现有 技术描述中所需要的附图做简单的介绍：
图 1是方波数据信号的极性经 2个扫描周期进行反转的液晶面板显示图； 图 2是对应图〗的实际方波数据信号波形及对应扫描脉冲的极性反转关系图； 图 3是对应图 1的亮暗显示效果图；
图 4是本发明的方法流程图；
图 5是本发明对应选取方波数据信号的极性经 3个扫描周期进行反转的实际方波数 据信号波形及对应扫描脉冲的极性反转关系图；
图 6是对应图 4的方波数据信号的极性经 3个扫描周期进行反转的液晶面板显示图； 图 7是对应图 5的亮暗显示效果图；
图 8是本方法对应的 HSD液晶显示装置结构图。 具体实施方式
以下将结合附图及实施例来详细说明本发明的实施方式， 借此对本发明如何应用技 术手段来解决技术 1¾题，并达成技术效果的实现过程能充分理解并据以实施。需要说明的 是， 只要不构成冲突， 本发明中的各个实施例以及各实施例中的各个特征可以相互结合， 所形成的技术方案均在本发明的保护范围之内。
在以下说明中， 出于解释的目的而阐述了许多具体细节， 以提供对本发明实施例的 彻底理解。然而， 对本领域的技术人员来说显而易见的是， 本发明可以不用这里的具体细 节或者所描述的特定方式来实施。
另外， 在 Pf†图的流程图示出的步骤可以在诸如一组计算机可执行指令的计算机系统 中执行， 并且， 虽然在流程图中示出了逻辑顺序， 但是在某些情况下， 可以以不同于此处 的顺序执行所示出或描述的步骤。
在 TFT- LCD显示靣板中，通过扫描驱动单元控制栅线和数据驱动单元控制数据线来 对面板中的像素单元进行控制。 为更好的说明本发明的改进之处， 以方波数据信号经过 2 个扫描脉冲反转一次为例来对 TFT- LCD显示面板垂直亮暗线的产生原理进行说明。
如图 1所示为 HSD结构的 TFT- LCD显示面板的像素阵列示意图， 以 G标注的行为 扫描线， 以 D标注的列为数据线。 扫描线与数据线包围区域为像素区。 图中的像素单元 以 Pxy表示， 其中 X代表第 X行， y代表第 y列。 在同一行的像素单元中， 扫描脉冲的驱 动顺序为先驱动数据线一侧的偶数列像素单元， 后驱动数据线另一侧的奇数列像素单元。 数据线上方波数据信号的极性反转结果如图 1中的 ·+、 一标注。
由于数据线的信号延迟效应，数据线上的方波数据信号发生极性反转时，数据信号需 要经过一个变化过程才能达到稳定值。 以图 1 中的数据线 1)2为例， D2上两侧的像素单 元 PI 2， P13 , P22, P23依次被驱动。 实际方波数据信号波形及对应扫描脉冲的极性反转 关系如图 2所示。其中 POL为极性反转控制信号， 用以控制方波数据信号极性发生反转。
如图 2所示， 当 G1扫描脉冲到来时， D2上的方波数据信号电压未达到指定电压， 使得该 G1扫描脉冲内 D2对应的偶数列像素单元 P12充电不足。在 G2扫描脉冲到来时， D2上的方波数据信号电压达到指定电压，使得在 G2扫描脉 ^内 D2对应的奇数列像素电 元 P13充电完全。 这就会导致像素单元 P12比像素单元 P13亮度低。
之后， D2上的方波数据信号极性发生反转， 扫描线驱动顾序不变。 当 G3扫描脉冲 到来时， D2上的方波数据信号电压未达到指定电压， 使得在 G3的扫描脉冲内 D2对应的 偶数列像素单元 P22充电不足。 在 G4扫描脉冲到来时， D2上的方波数据信号电压达到 指定电压， 使得在 G4扫描脉冲内 D2对应的奇数列像素单元 P23充电完全。 这就会导致 像素单元 P22比像素单元 P23亮度低。
因此， 从整体来看， 偶数列像素单元 P12和 P22比奇数列的像素单元 P13和 P23的 亮度低。对应 D2两侧的偶数列和奇数列的其他像素单元，扫描线驱动顺序不变的情况下， 偶数列像素单元均有充电不足现象， 使得偶数列和奇数列整体看起来就是垂直暗亮线显 示。对应其他的数据线也有相同的显示缺陷， 如图 3所示， 使得整个液晶面板看起来为垂 直亮暗线交替出现的画面。
为改善以上驱动方法产生的垂直暗亮线显示缺陷， 本发明提供一种改善的 HSD液晶 面板驱动方法。
本方法的步骤如图 4所示，首先由扫描驱动单元向液晶显示靣板的栅线提供一序列扫 描脉冲信号， 用以分别打开每行像素单元对应的 TFT元件。 再由数据驱动单元向液晶显 示面板的数据线提供方波数据信号， 在 TFT元件打开 '， 方波数据信号向与该 TFT元件 的漏极连接的像素单元充电。由 序控制单元提供第一极性反转信号控制方波数据信号的 极性经过 2n 个扫描脉冲后反转一次， 其中设定 n为大于或等于 1的整数。 时序控制单 元还提供第二极性反转信号，使得奇数列像素与偶数列像素分别对应的数据线上的方波数 据信号的极性在同一时刻上是相反的。同 设定奇数序号的栅线对应控制偶数列像素单元 的 TFT元件的导通， 偶数序号的栅线对应控制奇数列像素单元的 TFT元件的导通。
在本方法的一个实施例中， 选择 n=l , 即方波数据信号的极性经过 3个扫描脉冲后反 转一次为例来说明。 方波数据信号波形及对应扫描脉冲的极性反转关系如图 5所示。
如图 6所示， 以数据线 D2为 ί到， 扫描脉冲依次打开向 D2两侧的像素单元进行充电， D2上两侧的像素单元 P12， P13 , Ρ22 , Ρ23 , Ρ32 , Ρ33依次被驱动。 数据线上方波数据 信号的极性反转结果如 6图中的+、 一标注。
再次如图 5所示， 当 G1扫描脉冲到来时， D2上的电压信号未达到指定电压， 使得 在 G1的扫描周期内 [)2对应的偶数列像素单元 ΡΙ 2充电不足。 在 G3扫描脉冲到来时， D2上的电压信号达到指定电压, G3扫描周期内 D2对应的偶数列像素单元 Ρ22充电完全。 处于 G1与 G2中间的 G2扫描脉冲到来时， D2上的电压值介于 Gl、 G3扫描脉中对应的 数据信号电压之间， 因此 G2扫描周期内 D2对应的奇数列像素电极 P13的充电程度介于 P12 , P22的中间。 这就使得 D2数据线两侧像素单元的亮度关系为 P12<P13<P22。
之后， 由^序控制单元发出第一极性反转信号使得 D2的数据信号极性发生反转， 扫 描脉冲的驱动顾序不变。 当 G4扫描脉冲到来时， D2上的电压信号未达到指定电压， 使 得在 G4的扫描周期内 D2对应的偶数列像素单元 P23充电不足。在 G6扫描周期到来时， D2上的电 ίΐ信号达到指定电 ii，G6扫描周期内 D2对应的偶数列像素单元 P33充电完全。 处于 G4、 G6中间的 G5扫描周期到来时， D2上的电压信号电压介于 G4、 G6对应电压 的中间状态， G5扫描周期内 1)2对应的奇数列像素单元 P32充电程度介于 P23、 P33的中 间。 这就使得像素的亮度关系为 P23<P32<P33。
这就使得亮度不同的像素单元交错位亍 D2数据线两侧的奇数列和偶数列。 同理， 其 他数据线两侧的亮暗不同的像素单元也交错位亍该数据线的两侧，使得空间上亮暗不均的 像素单元交错排列，改善了面板上垂直亮暗线的显示缺陷。面板上像素单元的亮暗关系如 图 7所示， 其中中亮表示亮度处于暗、 明的中间状态。
如图 8所示， 实现以上所述改善垂直亮暗线显示缺陷的一种 HSD液晶显示装置包括 以下组成部分。
液晶显示单元，该液晶显示单元包括若千对栅线和若干条数据线。在相邻的栅线对和 相邻的数据线包围的空间区域内设置两个像素单元。数据线分别与相邻的两列像素单元上 的 TFT元件的源极连接。 奇数序号的楊线设置成控制对应液晶显示靣板上偶数列像素单 元的 TFT元件的导通， 偶数序号的栅线设置成控制对应奇数列像素单元的 TFT元件的导 通。
扫描信号驱动单元， 该单元用于向«线提供一序列扫描脉冲信号用以分别打开每行 像素单元对应的 TFT元件。
数据信号驱动单元， 该单元用于 1 数据线提供方波数据信号。 在 TFT元件打开时， 方波数据信号向与 TFT元件的漏极连接的像素单元充电。 其中， 方波数据信号的极性每 经过 211+1个扫描脉冲反转一次， II为大于或等于 1的整数， 即方波数据信号的极性每经 ϋ奇数个扫描脉冲后反转一次。
上述反转的动 可通过一种极性反转信号来特别地控制。 在这种情况下， 该 HSD液 晶显示装置还可包括时序控制单元。该时序控制单元用于向扫描驱动单元和数据驱动单元 提供时序控制信号。在提供的时序控刺信号中包括两种极性反转信号。其中， 第一极性反 转信号用于控制数据线上的方波数据信号的极性每经过三个扫描周期后反转一次，第二极 性反转信号用于控制液晶面板上奇数列像素单元与偶数列像素单元分别对应的数据线上 的方波数据信号的极性在同一时刻上是相反的。这里需要说明的是，提供的第一极性反转 信号当然不限定每经过三个扫描周期进行反转。事实上， 如前所述， 该时序控制单元可每 经过 2n+l个扫描脉冲向数据驱动单元发出极性反转控制信号， n为大于或等于 1的整数， 使得方波数据信号的极性每经过奇数个扫描脉冲后反转一次,这样便消除了例如垂直方向 上的亮暗不均现象。 这里， 为保证驱动显示效果， n的取值不宜过大， 否则会导致类似直 流驱动 ^所产生的问题。
应该理解的是， 本发明所公开的实施例不限于这里所公开的特定结构、 处理歩骤或 材料，而应当延伸到相关领域的普通技术人员所理解的这些特征的等同替代。还应当理解 的是， 在此使用的术语仅用亍描述特定实施例的目的， 而并不意味着限制。
说明书中提到的"一个实施例"或"实施例"意指结合实施例描述的特定特征、 结构或 特性包括在本发明的至少一个实施例中。因此，说明书通篇各个地方出现的短语 "一个实 施例' '或"实施例"并不一定均指同一个实施例。
为了方便， 在此使用的多个项目、 结构单元、 组成单元和 /或材料可出现在共同列表 中。然而， 这些列表应解释为该列表中的每个元素分别识别为单独唯一的成员。 因此， 在 没有反靣说明的情况下，该列表中没有一个成员可仅基于它们出现在共同列表中便被解释 为相同列表的任何其它成员的实际等同物。另夕卜，在此还可以连同针对各元件的替代一起 来参照本发明的各种实施例和示例。应当理解的是， 这些实施例、示例和替代并不解释为 彼此的等同物， 而被认为是本发明的单独自主的代表。
此外， 所描述的特征、 结构或特性 以任何其他合适的方式结合到一个或多个实施 例中。 在下面的描述中， 提供一些具体的细节， ί到如长度、 宽度、 形状等， 以提供对本发 明的实施例的全面理解。然而， 相关领域的技术人员将明白， 本发明无需上述一个或多个 具体的细节便可实现， 或者也可采用其它方法、 组件、 材料等实现。 在其它示例中， 周知 的结构、 材料或操作并未详细示出或描述以免模糊本发明的各个方面。
虽然上述示例用于说明本发明在一个或多个应用中的原理,但对于本领域的技术人员 来说， 在不背离本发明的原理和思想的情况下， 明显可以在形式上、用法及实施的细节上 作各种修改而不 ^付出创造性劳动。 因此， 本发明由所 W的权利要求书来限定。

Claims

权利要求书
1、 一种用于驱动 HSD液晶显示面板的方法， 其中， 包括以下步骤：
向所述液晶显示面板的 «线提供一序列扫描脉冲信号，以分别打开每行像素单元对应 的 TFT元件；
向所述液晶显示面板的数据线提供方波数据信号， 以在所述 TFT元件打开时， 通 ϋ所 述方波数据信号向与所述 TFT元件的漏极连接的像素单元充电， 其中， 所述方波数据信号 的极性每经过 2 -l个扫描脉冲反转一次， 其中 n为大亍或等于】的整数。
2、 如权利要求 1所述的用于驱动 HSD液晶显示面板的方法， 其中，
通过时序控制单元提供的第一极性反转信号来控制所述方波数据信号的极性在经过 3 个扫描脉冲后反转一次。
3、 如权利要求 1所述的用于驱动 HSD液晶显示面板的方法， 其中，
奇数序号的栅线对应控制偶数列像素单元的 TFT元件的导通，偶数序号的栅线对应控 制奇数列像素单元的 TFT元件的导通。
4、 如权利要求 2所述的用于驱动 HSD液晶显示面板的方法， 其中，
通过时序控制单元提供的第二极性反转信号，使得奇数列像素与偶数列像素分别对应 的数据线上的方波数据信号的极性在同一 ^"刻上是相反的。
5、 一种 HSD液晶显示装置， 包括：
液晶显示单元， 包括若千对榲线和若千条数据线， 其中， 在相邻的»线对和相邻的数 据线包围的空间内设置两个像素单元，所述数据线分别与相邻的两列像素单元上的 TFT元 件的源极连接；
扫描信号驱动单元，其用于向所述栅线提供一序列扫描脉冲信号， 以分别打开每行像 素单元对应的 TFT元件；
数据信号驱动单元， 其用亍向所述数据线提供方波数据信号， 以在所述 TFT元件打开 时， 通过所述方波数据信号 1 与所述 TFT元件的漏极连接的像素单元充电， 其中， 所述方 波数据信号的极性每经过 2n+l个扫描脉^反转一次， n为大于或等于 的整数。
6、 如权利要求 5所述的液晶显示装置， 其中， 所述装置还包括时序控制单元， 其用以 向所述数据信号驱动单元提供第一极性反转信号，使得所述方波数据信号的极性每经过三 个扫描周期后反转一次。
7、 如权利要求 6所述的液晶显示装置， 其中，
通过时序控制单元提供的第二极性反转信号，使得奇数列像素与偶数列像素分别对应 的数据线上的方波数据信号的极性在同一 刻上是相反的。
8、 如权利要求 6所述的液晶显示装置， 其中， 所述装置的栅线设置成， 奇数序号的栅 线对应控制偶数列像素的 TFT元件的导通， 偶数序号的栅线对应控制奇数列像素的 TFT元 件的导通。
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CN104317086A (zh) * 2014-11-14 2015-01-28 深圳市华星光电技术有限公司 一种用于驱动液晶显示面板的方法
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