WO2014161237A1 - 液晶显示面板及其驱动方法 - Google Patents

液晶显示面板及其驱动方法 Download PDF

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Publication number
WO2014161237A1
WO2014161237A1 PCT/CN2013/078175 CN2013078175W WO2014161237A1 WO 2014161237 A1 WO2014161237 A1 WO 2014161237A1 CN 2013078175 W CN2013078175 W CN 2013078175W WO 2014161237 A1 WO2014161237 A1 WO 2014161237A1
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WIPO (PCT)
Prior art keywords
scan
driving unit
inputs
data lines
liquid crystal
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Ceased
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PCT/CN2013/078175
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English (en)
French (fr)
Inventor
王金杰
陈政鸿
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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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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to GB1518645.5A priority Critical patent/GB2527470B/en
Priority to KR1020157031527A priority patent/KR101714952B1/ko
Priority to US14/004,167 priority patent/US20150325186A1/en
Publication of WO2014161237A1 publication Critical patent/WO2014161237A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/33—Acousto-optical deflection devices
    • 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
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0213—Addressing of scan or signal lines controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power
    • 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
    • G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a liquid crystal display panel and a driving method thereof.
  • FIG. 1 is a schematic diagram of a pixel structure of a liquid crystal display panel in the prior art.
  • the liquid crystal display panel includes 2m data lines D'1 ⁇ D'2m (data Line), 2k scanning lines G'1 ⁇ G'2k (Gate Line), the gate driving chip 11 and the source driving chip 12, the data lines and the scanning lines are arranged to cross each other, the gate driving chip 11 is connected to the scanning lines, and the source driving chip 12 is connected to the data lines, and two data adjacent to each other
  • the intersection of the line and the two scanning lines adjacent to each other forms a pixel unit (not labeled), and each of the pixel units is provided with a thin film transistor and a liquid crystal capacitor (not shown), and the pixel units of each column respectively correspond to R pixels, G pixels, and B pixels.
  • the gray scale voltage transmitted on the common voltage Vcom is used as the reference voltage, and can be divided into a positive gray scale voltage, a negative gray scale voltage, and a zero polarity gray scale voltage, and the positive gray scale voltage means that the voltage is higher than The common voltage Vcom, the negative gray scale voltage means that its voltage is lower than the common voltage Vcom, and the 0 gray scale voltage means that its voltage is equal to the common voltage Vcom.
  • the same gray scale value is expressed by the positive gray scale voltage and the negative gray scale voltage, the effect is theoretically consistent.
  • one of the data lines in the middle (ie, not on both sides) is connected to the pixel units on the left and right sides at line intervals, and column inversion can be realized by using this structure. Inversion) and dot inversion.
  • the R pixel, the G pixel, and the B pixel when the display screen is two adjacent columns of pixels and the other column is dark, for example, a water blue screen is displayed as an example, where the G pixel and the B pixel correspond to each other.
  • the pixel column inputs the gray scale voltage
  • the pixel column corresponding to the R pixel inputs 0 gray scale voltage, wherein the signal voltage to be fed is shown in FIG.
  • the pixel unit has a polarity of 0; the G pixel and the B pixel are in a bright state, and according to the flip-pixel driving method, the polarity corresponding to the G pixel and the B pixel is positive and negative interleaving, and thus the picture is inverted by dots.
  • the way to drive since the water blue screen is displayed, the R pixel is completely dark, so the R pixel corresponding column
  • the pixel unit has a polarity of 0; the G pixel and the B pixel are in a bright state, and according to the flip-pixel driving method, the polarity corresponding to the G pixel and the B pixel is positive and negative interleaving, and thus the picture is inverted by dots. The way to drive.
  • the data lines input gray scale voltages to the thin film transistors.
  • the data line D'2 corresponds to a 0-cycle signal
  • the G-pixel and B-pixel connected to the data line D'3 are all positive signals
  • the data line D'4 is a negative cycle. signal.
  • the signal line (including the scan line and the data line) itself has a voltage drop (RC) Loading), causing the end charging efficiency of the data line D'2 and the data line D'4 to be lower than the starting end, thereby causing the charging efficiency of the pixel unit charged by the same data line to be inconsistent; and the data line D'3 being sent out It is a DC signal, there is no signal delay, so its corresponding pixels can be well charged.
  • RC voltage drop
  • the above charging method causes the charging efficiency of each pixel unit to be inconsistent in the same column, and there is a case where light and dark appear, and the entire screen will have a horizontal bright line at the output end of the signal line.
  • An object of the present invention is to provide a liquid crystal display panel and a driving method thereof, which are aimed at the technical problem that the charging efficiency of the pixels is inconsistent due to the voltage drop of the signal lines in the prior art, thereby causing the horizontal bright lines to appear on the liquid crystal display panel.
  • the present invention constructs a liquid crystal display panel comprising a plurality of data lines extending in a column direction and a plurality of scanning lines extending in a row direction, the data lines and the scanning lines being vertically intersecting each other, adjacent to each other Two data lines intersect with two adjacent scan lines to form a pixel unit, and each of the pixel units is provided with a thin film transistor;
  • the source of the thin film transistor of each pixel unit is connected to the data line of the same side; and in the adjacent two rows, the sources of the thin film transistors of the two pixel units adjacent to each other in the column direction are respectively connected. Data lines on both sides; the gates of the thin film transistors of each row of pixel units are connected to the scan lines of the corresponding rows;
  • the liquid crystal display panel further includes a gate driving unit and a source driving unit, the gate driving unit electrically connecting the plurality of scanning lines and inputting a scanning signal according to a first preset sequence, in the first preset sequence
  • the gate driving unit inputs the scan signal to the plurality of rows of scan lines at intervals;
  • the source driving unit electrically connects the plurality of data lines and inputs gray scale voltages according to a second preset sequence, and in the second preset sequence, the source driving units are oriented to the plurality of columns
  • the extended data lines are input to the gray scale voltage at intervals;
  • the gate driving unit inputs the scan signal according to a first preset sequence
  • the source driving unit inputs the gray scale voltage according to a second preset sequence, in consecutive adjacent three columns of pixel units Two of the columns are in a bright state and the other column is in a dark state.
  • the present invention also constructs a liquid crystal display panel comprising a plurality of data lines extending in a column direction and a plurality of scanning lines extending in a row direction, the data lines and the scanning lines being perpendicular to each other Cross-arranged, two adjacent data lines and two adjacent scan lines intersect to form a pixel unit, and each of the pixel units is provided with a thin film transistor;
  • the pixel units in the same row are connected to the data lines on the same side; and in the adjacent two rows, the adjacent two pixel units are respectively connected to the data lines on both sides;
  • the liquid crystal display panel further includes a gate driving unit and a source driving unit, the gate driving unit electrically connecting the plurality of scanning lines and inputting a scanning signal according to a first preset sequence, in the first preset In sequence, the gate driving unit inputs a scan signal to the plurality of rows of scan lines at intervals;
  • the source driving unit electrically connects the plurality of data lines and inputs gray scale voltages according to a second preset sequence, and in the second preset sequence, the source driving units are oriented to the plurality of columns
  • the extended data lines are input with gray scale voltages at intervals.
  • the present invention also constructs a driving method of a liquid crystal display panel, the method comprising the following steps:
  • the gate driving unit inputs a scan signal according to a first preset sequence, and in the first preset sequence, the gate driving unit inputs a scan signal to the plurality of scan lines at intervals;
  • the source driving unit inputs a gray scale voltage according to a second preset sequence, and in the second preset sequence, the source driving unit inputs the gray scale voltage to the plurality of data lines extending in the column direction at intervals.
  • the signal lines (such as the scan line and the data line) are input into the signal or the gray scale voltage, thereby avoiding the display of two columns of pixel units in consecutive adjacent three columns of pixel units.
  • the other pixel unit is in the dark state, the charging efficiency of each pixel unit is inconsistent due to the voltage drop of the signal line, thereby causing the problem that the horizontal bright line appears on the output end of the signal line, thereby improving the problem.
  • the screen display effect of the LCD panel when the signal line is driven, the signal lines (such as the scan line and the data line) are input into the signal or the gray scale voltage, thereby avoiding the display of two columns of pixel units in consecutive adjacent three columns of pixel units.
  • FIG. 1 is a schematic structural view of a liquid crystal display panel in the prior art
  • FIG. 2 is a schematic diagram of voltages of a pixel unit when a liquid crystal display panel is driven by dot inversion in the prior art
  • FIG. 3 is a driving waveform diagram of a dot driving method in the prior art
  • FIG. 4 is a schematic structural view of a liquid crystal display panel according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of waveforms of a liquid crystal display panel in a point driving mode according to an embodiment of the present invention
  • FIG. 6 is a schematic flow chart of a driving method of a liquid crystal display panel according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a liquid crystal display panel according to a preferred embodiment of the present invention.
  • the liquid crystal display panel includes a plurality of pixel units, 2m data lines D1 to D2m, and 2k scanning lines G ⁇ G2k, and further includes a gate driving unit 41 and a source driving unit 42.
  • the gate driving unit 41 is connected to the scan line
  • the source driving unit 42 is connected to the data line
  • the data line and the scan line are vertically arranged to intersect each other. It is not difficult to see from FIG. 4 that two adjacent data lines and two adjacent scan lines intersect to form a pixel unit (not labeled).
  • a thin film transistor and a liquid crystal capacitor (not shown) are disposed in each pixel unit.
  • the gate driving unit 41 supplies a scan signal to the pixel unit through the scan line
  • the source driving unit 42 supplies the gray scale voltage to the pixel unit through the data line.
  • the source of the thin film transistor of each pixel unit in the pixel unit in the same row, is connected to the data line on the same side; and in the adjacent two rows of pixel units, two pixels adjacent in the column direction are sequentially adjacent.
  • the source of the thin film transistor of the unit is respectively connected to the data lines on both sides; and the gate of the thin film transistor of each row of pixel units is connected to the scan line of the corresponding row.
  • the source of the thin film transistor of the pixel unit of the M1 row is respectively connected to the data lines D2, D3, ...; the source of the thin film transistor of the pixel unit of the M2 row is connected to the data lines D1, D2, ..., the pixels of the M3 row.
  • the source of the thin film transistor of the cell is connected to the data lines D2, D3, ..., and so on.
  • the gate driving unit 41 electrically connects the plurality of scan lines and inputs a scan signal according to a first preset sequence, wherein in the first preset sequence, the gate driving unit 41 Scanning signals are input between the plurality of rows of scan lines at intervals;
  • the source driving unit 42 electrically connects the plurality of data lines and inputs gray scale voltages according to a second preset sequence, wherein the second preset In the sequence, the source driving unit 42 inputs gray scale voltages to the plurality of data lines extending in the column direction at intervals.
  • the embodiment of the present invention is mainly used in the following cases: in a pixel unit column corresponding to an adjacent R pixel, a G pixel, and a B pixel, the display picture is that two columns of pixel units are in a bright state, and another column of the pixel units is in a dark state. state.
  • the pixel units corresponding to the G pixel and the B pixel are in a bright state, and a positive polarity or a negative gray scale voltage needs to be input, and the pixel corresponding to the R pixel is required.
  • the cell column is in a dark state and requires a grayscale voltage of 0.
  • the first preset sequence in the embodiment of the present invention includes: in one scan period, the gate driving unit 41 first inputs a scan signal to an odd-numbered scan line, and then scans an even-numbered line. Line input scan signal.
  • the gate driving unit 41 inputs scan signals from the scan unit, which are not enumerated here.
  • the second preset sequence includes: in one scan period, the source driving unit 42 first inputs gray scale voltages to the data lines of the odd columns, and then inputs gray scale voltages to the data lines of the even columns.
  • the source driving unit 42 inputs the gray scale voltages by the data units, which are not enumerated here.
  • FIG. 5 is a voltage waveform diagram of a portion of the data lines of the liquid crystal display panel of FIG. 4 when the dot inversion driving method is employed.
  • the gray scale voltage provided by the data line includes a positive polarity gray scale voltage (ie, the voltage is higher than the common voltage Vcom), the negative polarity gray scale voltage is a negative polarity (ie, the voltage is lower than the common voltage Vcom), and the 0 gray scale voltage (the voltage is equal to Common voltage Vcom).
  • the driving method of the dot inversion of the liquid crystal display panel of the embodiment of the present invention is as follows:
  • the odd-line scan line G2k-1 is turned on to provide a scan signal, and the thin film transistors of the pixel cells of the G2k-1 row are turned on.
  • the gray line voltage is input to the data line D2k-1 of the odd column.
  • the scan lines G1 and G3 are turned on, and the data lines D3 and D5 are input with a gray scale voltage.
  • the data line D3 supplies a positive gray scale voltage to the corresponding G pixel unit; and the data line D5 provides a 0 gray scale voltage to the corresponding R.
  • a pixel unit for example, a pixel unit (G pixel) in which the scanning line G1 and the data line D3 are cross-connected is written in a positive polarity gray scale voltage, and a pixel unit (G pixel) in which the scanning line G3 and the data line D3 are cross-connected is written in a positive polarity. Gray scale voltage, and so on.
  • the scanning lines G2k of the even rows are turned on to provide a scanning signal, and the thin film transistors of the pixel cells of the G2k row are turned on.
  • the even-numbered data line D2k inputs the gray scale voltage, for example, the scan lines G2 and G4 are turned on, and the data lines D2 and D4 are input with the gray scale voltage.
  • the data line D2 provides the negative gray scale voltage to the corresponding G pixel.
  • the data line D4 provides a 0 gray scale voltage to the corresponding R pixel unit; for example, the pixel unit (G pixel) cross-connected by the scan line G2 and the data line D2 is written to the negative gray scale voltage, the scan line G4 and the data line D4
  • the cross-connected pixel cells (R pixels) are written with a gray scale voltage of 0 polarity, and so on.
  • the polarity of the pixel unit column corresponding to the R pixel is 0, which is full dark;
  • the polarity of the pixel unit column corresponding to the G pixel and the B pixel is positive polarity or negative polarity, and is positively and negatively staggered, and is in a bright state. ;
  • the screen will be driven in a dot-reversed manner and the water blue screen will be displayed.
  • an odd-numbered row of scan signals is first input, and then an even-numbered row of scan signals is input; and at the same time, the data lines are first input into an odd-numbered column of data.
  • Signal then input the data signal of even columns. Since the input waveform will only have a polarity change when the odd line is switched to the even line, the signal is transmitted in the DC mode at other times, so the RC can be reduced.
  • the phenomenon of charging causes a difference in pixel charging rate, ensuring that the charging rate of all pixel units is maintained at an average level, thereby eliminating the horizontal bright line of the liquid crystal display panel during display.
  • FIG. 6 is a schematic flow chart of a driving method of a liquid crystal display panel according to an embodiment of the present invention.
  • step S601 the gate driving unit inputs a scan signal according to a first preset sequence, wherein in the first preset sequence, the gate driving unit inputs a scan interval between the plurality of rows of scan lines signal.
  • step S602 the source driving unit inputs gray scale voltages according to a second preset sequence, wherein in the second preset sequence, the source driving unit is spaced apart from the plurality of data lines extending in the column direction Ground the grayscale voltage.
  • the gate driving unit when the gate driving unit inputs the scan signal according to a first preset sequence, and the source driving unit inputs the gray scale voltage according to a second preset sequence, the pixel of the liquid crystal display panel The cell assumes a state in which two consecutive columns of pixel cells are in a bright state and the other column is in a dark state.
  • the first preset sequence of the embodiment of the present invention includes: in one scan period, the gate driving unit first inputs a scan signal to an odd-numbered row of scan lines, and then inputs the scan lines to the even-numbered rows. Scan the signal.
  • the second predetermined sequence includes: in one scan period, the source driving unit first inputs gray scale voltages to the data lines of the odd columns, and then inputs gray scale voltages to the data lines of the even columns.
  • the liquid crystal display panel includes a plurality of data lines extending in a column direction, and a plurality of scan lines extending in a row direction, the data lines and the scan lines.
  • the adjacent two data lines and the adjacent two scan lines intersect to form a pixel unit, and each of the pixel units is provided with a thin film transistor; the gates of the thin film transistors of each row of pixel units are connected to each other The scan line of the line.
  • the pixel units located in the same row are connected to the data lines on the same side; and in the adjacent two rows, the adjacent two pixel units are respectively connected to the data lines on both sides.
  • the signal lines (such as the scan line and the data line) are input into the signal or the gray scale voltage, thereby avoiding the display of two columns of pixel units in consecutive adjacent three columns of pixel units.
  • the other pixel unit is in the dark state, the charging efficiency of each pixel unit is inconsistent due to the voltage drop of the signal line, thereby causing the problem that the horizontal bright line appears on the output end of the signal line, thereby improving the problem.
  • the screen display effect of the LCD panel when the signal line is driven, the signal lines (such as the scan line and the data line) are input into the signal or the gray scale voltage, thereby avoiding the display of two columns of pixel units in consecutive adjacent three columns of pixel units.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
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Abstract

一种液晶显示面板及其驱动方法，栅极驱动单元（41）向多条各行扫描线（G~G2k）之间间隔地输入扫描信号；源极驱动单元（42）向多条沿列方向延伸的数据线（D1~D2m）间隔地输入灰阶电压。这种液晶显示面板及其驱动方法，避免了由于信号线存在的电压降而造成的对像素单元的充电效率不一致的问题。

Description

液晶显示面板及其驱动方法 技术领域
本发明涉及液晶显示技术领域，特别是涉及一种液晶显示面板及其驱动方法。
 背景技术
随着液晶显示面板的不断普及，对液晶显示面板显示质量的要求越来越高。
请参阅图1，图1为一种现有技术中液晶显示面板的像素结构示意图，上述液晶显示面板包括2m条数据线D'1~D'2m（data line），2k条扫描线G'1~G'2k（Gate line），栅极驱动芯片11以及源极驱动芯片12，上述数据线和扫描线相互交叉排列，栅极驱动芯片11连接扫描线，源极驱动芯片12连接数据线，彼此相邻的两条数据线与彼此相邻的两条扫描线的交叉区域形成一像素单元(未标号)，每一像素单元内设置一薄膜晶体管和一液晶电容(图未示)，且每一列的像素单元均分别对应R像素、G像素和B像素。
其中在数据线(D'1~ D'2m )上所传送的灰阶电压，以公共电压Vcom作为参考电压，可以分为正极性灰阶电压、负极性灰阶电压以及0极性灰阶电压，正极性灰阶电压是指其电压高于公共电压Vcom，负极性灰阶电压是指其电压低于公共电压Vcom，0极性灰阶电压是指其电压等于公共电压Vcom。同一灰阶值分别以正极性灰阶电压和负极性灰阶电压表示时，理论上显示效果是一致的。
图1所示的液晶显示面板的结构中，处在中间（即不在两侧）的其中一条数据线会按行间隔连接到左右两侧的像素单元，使用此种结构可以实现列反转（column inversion）以及点反转（dot inversion）。
更具体的，在R像素、G像素和B像素中，当显示画面为相邻的两列像素、而另外一列暗时，譬如以显示水蓝色画面为例，此时G像素和B像素对应的像素列输入灰阶电压，而R像素对应的像素列输入0灰阶电压，其中送入的信号电压请参阅图2，由于显示水蓝色画面，因此R像素全暗，故R像素对应列的像素单元的极性为0；G像素和B像素为亮态，且依照flip-pixel的驱动方式，G像素和B像素对应的极性为正负交错，由此画面会以点反转的方式进行驱动。
在具体实施过程中，由于扫描线是按照顺序逐行进行扫描，一旦扫描线的扫描信号打开像素单元的薄膜晶体管，则数据线将灰阶电压输入至该薄膜晶体管。譬如请参阅图3所示的信号线波形，数据线D'2对应的为0循环信号，数据线D'3连接的G像素和B像素为全正的信号，数据线D'4为负循环信号。由于信号线（包括扫描线和数据线）本身存在电压降（RC loading），导致数据线D'2和数据线D'4的末端充电效率一定会低于起始端，进而导致由同一数据线进行充电的像素单元的充电效率不一致；而数据线D'3由于送出的是直流信号，不会存在信号的延迟，所以它所对应的像素都可以很好的完成充电。
再回到图3，上述的充电方式就会导致在同一列中，各像素单元的充电效率不一致，出现有亮有暗的情况，整个画面就会在信号线的输出端出现水平亮暗线。
 技术问题
本发明的目的在于提供一种液晶显示面板及其驱动方法，旨在现有技术中由于信号线存在电压降，导致像素的充电效率不一致，进而使得液晶显示面板出现水平亮暗线的技术问题。
 技术解决方案
本发明构造了一种液晶显示面板，其中包括多条沿列方向延伸的数据线、以及多条沿行方向延伸的扫描线，所述数据线和所述扫描线相互垂直交叉排列，相邻的两条数据线与相邻的两条扫描线交叉形成一像素单元，上述每一像素单元内设置有一薄膜晶体管；
其中位于同一行的像素单元中，各像素单元的薄膜晶体管的源极连接同一侧的数据线；而相邻的两行中，列方向顺序相邻的两像素单元的薄膜晶体管的源极分别连接两侧的数据线；每一行像素单元的薄膜晶体管的栅极均连接对应行的扫描线；
所述液晶显示面板还包括栅极驱动单元和源极驱动单元，所述栅极驱动单元电连接所述多条扫描线并按照第一预设顺序输入扫描信号，在所述第一预设顺序下，所述栅极驱动单元向所述多条各行扫描线之间间隔地输入所述扫描信号；
所述源极驱动单元电连接所述多条数据线并按照第二预设顺序输入灰阶电压，在所述第二预设顺序下，所述源极驱动单元向所述多条沿列方向延伸的数据线间隔地输入所述灰阶电压；
其中在所述栅极驱动单元按照第一预设顺序输入所述扫描信号、所述源极驱动单元按照第二预设顺序输入所述灰阶电压时，在连续相邻的三列像素单元中，其中两列为亮态，而另外一列为暗态。
为解决上述技术问题，本发明还构造了一种液晶显示面板，包括多条沿列方向延伸的数据线、以及多条沿行方向延伸的扫描线，所述数据线和所述扫描线相互垂直交叉排列，相邻的两条数据线与相邻的两条扫描线交叉形成一像素单元，上述每一像素单元内设置有一薄膜晶体管；
其中位于同一行的像素单元连接同一侧的数据线；而相邻的两行中，顺序相邻的两像素单元分别连接两侧的数据线；
所述液晶显示面板还包括栅极驱动单元和源极驱动单元，所述栅极驱动单元，电连接所述多条扫描线并按照第一预设顺序输入扫描信号，在所述第一预设顺序下，所述栅极驱动单元向所述多条各行扫描线之间间隔地输入扫描信号；
所述源极驱动单元电连接所述多条数据线并按照第二预设顺序输入灰阶电压，在所述第二预设顺序下，所述源极驱动单元向所述多条沿列方向延伸的数据线间隔地输入灰阶电压。
为解决上述技术问题，本发明还构造了一种液晶显示面板的驱动方法，所述方法包括以下步骤：
栅极驱动单元按照第一预设顺序输入扫描信号，在所述第一预设顺序下，所述栅极驱动单元向所述多条各行扫描线之间间隔地输入扫描信号；
源极驱动单元按照第二预设顺序输入灰阶电压，在所述第二预设顺序下，所述源极驱动单元向所述多条沿列方向延伸的数据线间隔地输入灰阶电压。
 有益效果
本发明实施例在对信号线进行驱动时，将信号线（譬如扫描线和数据线）间隔输入信号或者灰阶电压，避免了在连续相邻的三列像素单元中，其中两列像素单元显示为亮态、而另一像素单元显示为暗态时，由于信号线存在电压降造成的对各像素单元的充电效率不一致，进而导致画面在信号线的输出端出现水平亮暗线的问题，提高了液晶显示面板的画面显示效果。
 附图说明
图1为现有技术中液晶显示面板的结构示意图；
图2为现有技术中液晶显示面板进行点反转驱动时像素单元的电压示意图；
图3为现有技术中点驱动方式下的驱动波形图；
图4为本发明实施例中液晶显示面板的结构示意图；
图5为本发明实施例中液晶显示面板的点驱动方式下的波形示意图；
图6为本发明实施例中液晶显示面板的驱动方法的流程示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是以相同标号表示。
请参阅图4，图4为本发明较佳实施例液晶显示面板的结构示意图。
上述液晶显示面板包括多个像素单元，2m条数据线D1~D2m以及2k条扫描线G~G2k，还包括栅极驱动单元41及源极驱动单元42。其中，栅极驱动单元41连接扫描线，源极驱动单元42连接数据线，所述数据线和所述扫描线相互垂直交叉排列。从图4不难看出，相邻两条数据线和相邻两条扫描线交叉形成一像素单元(未标号)。每一像素单元内设置一薄膜晶体管和一液晶电容(图未示)。所述栅极驱动单元41通过扫描线为像素单元提供扫描信号，所述源极驱动单元42通过数据线为像素单元提供灰阶电压。
在本发明实施例中，位于同一行的像素单元中，各像素单元的薄膜晶体管的源极连接同一侧的数据线；而相邻的两行像素单元中，沿列方向顺序相邻的两像素单元的薄膜晶体管的源极分别连接两侧的数据线；且每一行像素单元的薄膜晶体管的栅极均连接对应行的扫描线。具体请参阅图4，M1行的像素单元的薄膜晶体管的源极分别连接数据线D2、D3…；M2行的像素单元的薄膜晶体管的源极则连接数据线D1、D2…，M3行的像素单元的薄膜晶体管的源极分别连接数据线D2、D3…，依次类推。
在本发明实施例所述栅极驱动单元41电连接所述多条扫描线并按照第一预设顺序输入扫描信号，其中在所述第一预设顺序下，所述栅极驱动单元41向所述多条各行扫描线之间间隔地输入扫描信号；所述源极驱动单元42电连接所述多条数据线并按照第二预设顺序输入灰阶电压，其中在所述第二预设顺序下，所述源极驱动单元42向所述多条沿列方向延伸的数据线间隔地输入灰阶电压。
具体的，本发明实施例主要用于以下情形：在相邻的R像素、G像素和B像素对应的像素单元列中，显示画面为两列像素单元为亮态、而另外一列像素单元为暗态。譬如，以显示水蓝色画面为例，此时，在图4中，G像素和B像素对应的像素单元列为亮态，需要输入正极性或者负极性灰阶电压，而R像素对应的像素单元列为暗态，需要输入0灰阶电压。为实现上述效果，本发明实施例中的所述第一预设顺序包括：在一个扫描周期内，所述栅极驱动单元41先向奇数行的扫描线输入扫描信号，再向偶数行的扫描线输入扫描信号。当然，在具体实施过程中，也可以是其中两行扫描线作为一个扫描单元，之后所述栅极驱动单元41间隔扫描单元输入扫描信号，此处不一一列举。
具体的，所述第二预设顺序包括：在一个扫描周期内，所述源极驱动单元42先向奇数列的数据线输入灰阶电压，再向偶数列的数据线输入灰阶电压。当然，在具体实施过程中，也可以是两列数据线作为一个数据单元，之后所述源极驱动单元42间隔数据单元输入灰阶电压，此处不一一列举。
请参阅图5，图5为图4所示液晶显示面板在采用点反转驱动方法时部分数据线上的电压波形图。其中，数据线提供的灰阶电压包括正极性灰阶电压(即电压高于公共电压Vcom)、负极性灰阶电压为负极性(即电压低于公共电压Vcom)以及0灰阶电压（电压等于公共电压Vcom）。
譬如以图4和图5为例，在一个周期T内，为了显示水蓝色画面，需将G像素和B像素对应的像素单元列显示为亮态，R像素对应的像素单元列显示为暗态，本发明实施例的液晶显示面板的点反转的驱动方法如下：
首先，在前T/2时，奇数行的扫描线G2k-1打开，提供扫描信号，G2k-1行的像素单元的薄膜晶体管开启。此时，奇数列的数据线D2k-1输入灰阶电压。譬如，扫描线G1、G3打开，数据线D3、D5输入灰阶电压，此时数据线D3提供正极性的灰阶电压到对应的G像素单元；数据线D5提供0灰阶电压到对应的R像素单元；譬如扫描线G1与数据线D3交叉连接的像素单元（G像素）被写入正极性灰阶电压，扫描线G3与数据线D3交叉连接的像素单元（G像素）被写入正极性灰阶电压，依次类推。
之后，在后T/2时，偶数行的扫描线G2k打开，提供扫描信号，G2k行的像素单元的薄膜晶体管开启。此时，偶数列的数据线D2k输入灰阶电压，譬如扫描线G2、G4打开，数据线D2、D4输入灰阶电压，此时，数据线D2提供负极性的灰阶电压到对应的G像素单元；数据线D4提供0灰阶电压到对应的R像素单元；譬如扫描线G2与数据线D2交叉连接的像素单元（G像素）被写入负极性灰阶电压，扫描线G4与数据线D4交叉连接的像素单元（R像素）被写入0极性的灰阶电压，依次类推。通过上述驱动方式，R像素对应的像素单元列的极性为0，为全暗；G像素和B像素对应的像素单元列的极性为正极性或者负极性，且正负交错，为亮态；由此画面会以点反转的方式进行驱动，且显示水蓝色画面。
综上，本发明实施例中，扫描线在输入扫描信号时，在一个扫描周期内，首先输入奇数行的扫描信号，之后再输入偶数行的扫描信号；同时，数据线先输入奇数列的数据信号，之后再输入偶数列的数据信号。由于输入的波形只在奇数行切换到偶数行时才会有极性的变换，其他时间均以直流的方式进行信号的传输，因此可以减少由于RC loading造成画素充电率出现差异的现象，保证所有的像素单元充电率大致维持在一个平均的水准，进而消除液晶显示面板在显示时的水平亮暗线。
请参阅图6，图6为本发明实施例提供的液晶显示面板的驱动方法的流程示意图。
在步骤S601中，栅极驱动单元按照第一预设顺序输入扫描信号，其中在所述第一预设顺序下，所述栅极驱动单元向所述多条各行扫描线之间间隔地输入扫描信号。
在步骤S602中，源极驱动单元按照第二预设顺序输入灰阶电压，其中在所述第二预设顺序下，所述源极驱动单元向所述多条沿列方向延伸的数据线间隔地输入灰阶电压。
更优的，在所述栅极驱动单元按照第一预设顺序输入所述扫描信号、所述源极驱动单元按照第二预设顺序输入所述灰阶电压时，所述液晶显示面板的像素单元呈现以下状态：在连续相邻的三列像素单元中，其中两列为亮态，而另外一列为暗态。为达到上述效果，本发明实施例的所述第一预设顺序包括：在一个扫描周期内，所述栅极驱动单元先向奇数行的扫描线输入扫描信号，再向偶数行的扫描线输入扫描信号。而所述第二预设顺序包括：在一个扫描周期内，所述源极驱动单元先向奇数列的数据线输入灰阶电压，再向偶数列的数据线输入灰阶电压。
当然，在具体实施过程中，上述步骤S601和步骤S602同步进行。
关于所述液晶显示面板的详细描述请参阅图4，所述液晶显示面板包括多条沿列方向延伸的数据线、以及多条沿行方向延伸的扫描线，所述数据线和所述扫描线相互垂直交叉排列，相邻的两条数据线与相邻的两条扫描线交叉形成一像素单元，上述每一像素单元内设置有一薄膜晶体管；每一行像素单元的薄膜晶体管的栅极均连接对应行的扫描线。其中位于同一行的像素单元连接同一侧的数据线；而相邻的两行中，顺序相邻的两像素单元分别连接两侧的数据线。
本发明实施例在对信号线进行驱动时，将信号线（譬如扫描线和数据线）间隔输入信号或者灰阶电压，避免了在连续相邻的三列像素单元中，其中两列像素单元显示为亮态、而另一像素单元显示为暗态时，由于信号线存在电压降造成的对各像素单元的充电效率不一致，进而导致画面在信号线的输出端出现水平亮暗线的问题，提高了液晶显示面板的画面显示效果。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
 本发明的实施方式
工业实用性
序列表自由内容

Claims (13)

  1. 一种液晶显示面板，其中包括多条沿列方向延伸的数据线、以及多条沿行方向延伸的扫描线，所述数据线和所述扫描线相互垂直交叉排列，相邻的两条数据线与相邻的两条扫描线交叉形成一像素单元，上述每一像素单元内设置有一薄膜晶体管；
    其中位于同一行的像素单元中，各像素单元的薄膜晶体管的源极连接同一侧的数据线；而相邻的两行中，列方向顺序相邻的两像素单元的薄膜晶体管的源极分别连接两侧的数据线；每一行像素单元的薄膜晶体管的栅极均连接对应行的扫描线；
    所述液晶显示面板还包括栅极驱动单元和源极驱动单元，所述栅极驱动单元电连接所述多条扫描线并按照第一预设顺序输入扫描信号，在所述第一预设顺序下，所述栅极驱动单元向所述多条各行扫描线之间间隔地输入所述扫描信号；
    所述源极驱动单元电连接所述多条数据线并按照第二预设顺序输入灰阶电压，在所述第二预设顺序下，所述源极驱动单元向所述多条沿列方向延伸的数据线间隔地输入所述灰阶电压；
    其中在所述栅极驱动单元按照第一预设顺序输入所述扫描信号、所述源极驱动单元按照第二预设顺序输入所述灰阶电压时，在连续相邻的三列像素单元中，其中两列为亮态，而另外一列为暗态。
  2. 根据权利要求1所述的液晶显示面板，其中所述第一预设顺序包括：在一个扫描周期内，所述栅极驱动单元先向奇数行的扫描线输入扫描信号，再向偶数行的扫描线输入扫描信号。
  3. 根据权利要求1所述的液晶显示面板，其中所述第二预设顺序包括：在一个扫描周期内，所述源极驱动单元先向奇数列的数据线输入灰阶电压，再向偶数列的数据线输入灰阶电压。
  4. 一种液晶显示面板，其中包括多条沿列方向延伸的数据线、以及多条沿行方向延伸的扫描线，所述数据线和所述扫描线相互垂直交叉排列，相邻的两条数据线与相邻的两条扫描线交叉形成一像素单元，上述每一像素单元内设置有一薄膜晶体管；
    其中位于同一行的像素单元中，各像素单元的薄膜晶体管的源极连接同一侧的数据线；而相邻的两行中，列方向顺序相邻的两像素单元的薄膜晶体管的源极分别连接两侧的数据线；
    所述液晶显示面板还包括栅极驱动单元和源极驱动单元，所述栅极驱动单元电连接所述多条扫描线并按照第一预设顺序输入扫描信号，在所述第一预设顺序下，所述栅极驱动单元向所述多条各行扫描线之间间隔地输入所述扫描信号；
    所述源极驱动单元电连接所述多条数据线并按照第二预设顺序输入灰阶电压，在所述第二预设顺序下，所述源极驱动单元向所述多条沿列方向延伸的数据线间隔地输入所述灰阶电压。
  5. 根据权利要求4所述的液晶显示面板，其特征在于，在所述栅极驱动单元按照第一预设顺序输入所述扫描信号、所述源极驱动单元按照第二预设顺序输入所述灰阶电压时，在连续相邻的三列像素单元中，其中两列为亮态，而另外一列为暗态。
  6. 根据权利要求5所述的液晶显示面板，其中所述第一预设顺序包括：在一个扫描周期内，所述栅极驱动单元先向奇数行的扫描线输入扫描信号，再向偶数行的扫描线输入扫描信号。
  7. 根据权利要求5所述的液晶显示面板，其中所述第二预设顺序包括：在一个扫描周期内，所述源极驱动单元先向奇数列的数据线输入灰阶电压，再向偶数列的数据线输入灰阶电压。
  8. 根据权利要求4所述的液晶显示面板，其中每一行像素单元的薄膜晶体管的栅极均连接对应行的扫描线。
  9. 一种液晶显示面板的驱动方法，其中所述方法包括以下步骤：
    栅极驱动单元按照第一预设顺序输入扫描信号，在所述第一预设顺序下，所述栅极驱动单元向所述多条各行扫描线之间间隔地输入扫描信号；
    源极驱动单元按照第二预设顺序输入灰阶电压，在所述第二预设顺序下，所述源极驱动单元向所述多条沿列方向延伸的数据线间隔地输入灰阶电压。
  10. 根据权利要求9所述的液晶显示面板的驱动方法，在所述栅极驱动单元按照第一预设顺序输入所述扫描信号、所述源极驱动单元按照第二预设顺序输入所述灰阶电压时，在连续相邻的三列像素单元中，其中两列为亮态，而另外一列为暗态。
  11. 根据权利要求9所述的液晶显示面板的驱动方法，其中所述液晶显示面板包括多条沿列方向延伸的数据线、以及多条沿行方向延伸的扫描线，所述数据线和所述扫描线相互垂直交叉排列，相邻的两条数据线与相邻的两条扫描线交叉形成一像素单元，上述每一像素单元内设置有一薄膜晶体管；
    其中位于同一行的像素单元连接同一侧的数据线；而相邻的两行中，顺序相邻的两像素单元分别连接两侧的数据线。
  12. 根据权利要求10所述的液晶显示面板的驱动方法，其中所述第一预设顺序包括：在一个扫描周期内，所述栅极驱动单元先向奇数行的扫描线输入扫描信号，再向偶数行的扫描线输入扫描信号。
  13. 根据权利要求10所述的液晶显示面板的驱动方法，其中所述第二预设顺序包括：在一个扫描周期内，所述源极驱动单元先向奇数列的数据线输入灰阶电压，再向偶数列的数据线输入灰阶电压。
PCT/CN2013/078175 2013-04-03 2013-06-27 液晶显示面板及其驱动方法 Ceased WO2014161237A1 (zh)

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