WO2016049951A1 - 液晶显示面板 - Google Patents

液晶显示面板 Download PDF

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Publication number
WO2016049951A1
WO2016049951A1 PCT/CN2014/089011 CN2014089011W WO2016049951A1 WO 2016049951 A1 WO2016049951 A1 WO 2016049951A1 CN 2014089011 W CN2014089011 W CN 2014089011W WO 2016049951 A1 WO2016049951 A1 WO 2016049951A1
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Prior art keywords
pixels
column
data line
liquid crystal
display panel
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PCT/CN2014/089011
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English (en)
French (fr)
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刘桓
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深圳市华星光电技术有限公司
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Priority to US14/416,377 priority Critical patent/US9852704B2/en
Publication of WO2016049951A1 publication Critical patent/WO2016049951A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3614Control of polarity reversal in general
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • G02F1/136286Wiring, e.g. gate line, drain line
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362Active matrix addressed cells
    • G02F1/1368Active matrix addressed cells in which the switching element is a three-electrode device
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3685Details of drivers for data electrodes
    • G09G3/3688Details of drivers for data electrodes suitable for active matrices only
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F2201/00Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/121Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode common or background
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0421Structural details of the set of electrodes
    • G09G2300/043Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243Details of the generation of driving signals
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0209Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0247Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display panel.
  • TFT-LCD thin film transistor-liquid crystal display
  • the column inversion driving method is characterized in that the corresponding sub-pixels on adjacent data lines perform positive and negative polarity inversions in units of columns. This driving method makes the ⁇ phase difference between the flicker waveforms of the adjacent two columns, and plays a role of suppressing flicker to a certain extent.
  • FIG. 1 is a schematic view showing the structure of a liquid crystal display panel in the prior art, in which a driving structure using a column inversion driving method is shown.
  • a scan signal is input, all TFTs connected to the same scan line are turned on, and pixel drive signals on the data line are stored in the storage capacitor Cst and the liquid crystal capacitor Clc inside the pixel. Then all the TFTs on the scan line are turned off, and all the TFTs on the next scan line are turned on, and the voltage on the data line is changed to the data voltage required for the pixels on the scan line.
  • Some display panels use a 1G2D architecture for low color shift design, and the main and sub-pixels of the pixel are charged by two data lines of opposite polarities. Although this design can weaken the data line to a certain extent The coupling effect on the common electrode, however, due to a certain design requirement in this low chromatic design, and affected by the feed through voltage, the coupling effect of the data line on the common electrode is also generated to some extent. , causing the common electrode voltage Vcom to deviate. Therefore, the 1G2D architecture still produces horizontal crosstalk caused by the coupling of the common electrodes.
  • One of the technical problems to be solved by the present invention is to provide a liquid crystal display panel capable of improving horizontal crosstalk.
  • an embodiment of the present application firstly provides a liquid crystal display panel, including: a plurality of pixels arranged in an array, the array being formed by orthogonally configuring a plurality of data lines and a plurality of scan lines.
  • the plurality of data lines include: a first data line disposed corresponding to each column of pixels, the first data line being connected to each pixel of the column of pixels and inputting a pixel driving signal to the column of pixels through the first data line; At least one second data line corresponding to each column of pixels or at least two columns of pixels adjacent to each group, the at least one second data line is not connected to any one of any one of the columns, and the at least one second data
  • the sum of the change of the input signal of the line and the change of the pixel drive signal of the at least two columns of pixels adjacent to each column of pixels or each group is zero, so that the common electrode voltage does not deviate from the predetermined voltage.
  • the input signal of the second data line is opposite in polarity and equal in magnitude to the pixel driving signal of the column of pixels.
  • each of the second data lines is disposed on the same side of each column of pixels.
  • the input signals of the plurality of second data lines are opposite in polarity and equal in magnitude to the pixel driving signals of the column of pixels.
  • the plurality of second data lines are disposed on the same side of each column of pixels, or the second data lines of the even numbers when the second data lines corresponding to the pixels of each column are even It is symmetrically placed at both ends of each column of pixels.
  • the input signal of the second data line and the pixel driving signal polarity of the adjacent at least two columns of pixels are equal in size.
  • each of the second data lines is disposed on the same side of each of the adjacent at least two columns of pixels.
  • the input signals of the plurality of second data lines are driven by pixels of the adjacent at least two columns of pixels
  • the signals are of opposite polarity and of equal magnitude.
  • the plurality of second data lines are disposed on the same side of each group of adjacent at least two columns of pixels, or the second data line disposed corresponding to at least two columns of pixels adjacent to each group is In the case of even strips, the second data lines of the even strips are symmetrically disposed at both ends of at least two columns of pixels adjacent to each group.
  • the liquid crystal display panel is adapted to a column inversion driving mode, a row inversion driving mode, a frame inversion driving mode, and a dot inversion driving mode.
  • Embodiments of the present application also provide a liquid crystal display including the above liquid crystal display panel.
  • the embodiment of the present application provides a liquid crystal display panel, wherein at least one data line is added correspondingly to each column of pixels or each group of adjacent at least two columns of pixels, and the input signal of the at least one data line changes with each column of pixels. Or the sum of the changes of the pixel driving signals of at least two columns of pixels adjacent to each group is 0, so that the phenomenon that the common electrode voltage is deviated by the data line coupling can be weakened to a large extent, thereby improving the prior art due to the common Horizontal crosstalk caused by the electrode voltage being coupled.
  • FIG. 1 is a schematic structural view of a liquid crystal display panel of the prior art.
  • FIG. 3 is a diagram showing an example of horizontal crosstalk of a liquid crystal display panel of the prior art.
  • FIG. 4 is a schematic structural view of a liquid crystal display panel according to an embodiment of the present application.
  • Fig. 5 is a waveform diagram of a data line voltage and a common electrode voltage applied to the liquid crystal display panel shown in Fig. 4 under a reload screen.
  • FIG. 6 is a schematic structural diagram of a liquid crystal display panel according to another embodiment of the present application.
  • the embodiment of the present application provides a liquid crystal display panel, by adding at least one corresponding pixel in each column or each group of adjacent at least two columns of pixels.
  • a data line, and a change in an input signal of the at least one data line and a change in a pixel drive signal of at least two columns of pixels adjacent to each column of pixels or each group is zero, thereby being able to substantially reduce the common electrode voltage
  • a phenomenon in which the data lines are coupled to cause a deviation thereby improving the horizontal crosstalk phenomenon in the prior art due to the coupling of the common electrode voltage.
  • the display panel includes an image display area 100, a data driver 200, and a scan driver 300.
  • the image display area 100 includes an array (also referred to as a pixel area) formed by orthogonally configuring a plurality of data lines (data lines D1, D1' as shown) and a plurality of scan lines, and a plurality of arrays arranged in the array Pixel.
  • the data driver 200 transmits the supplied pixel driving signal to the image display area 100 through a plurality of data lines coupled thereto.
  • the scan driver 300 transmits the supplied scan signal to the image display area 100 through a plurality of scan lines coupled thereto.
  • each of the second data lines is disposed on the same side of each column of pixels. As shown in FIG. 4, two data lines are provided corresponding to each column of pixels, which are referred to herein as a first data line and a second data line for convenience of explanation.
  • the first data line is connected to each pixel of the column of pixels and inputs a pixel driving signal to the column of pixels through the first data line
  • the second data line is not connected to any pixel of the column of pixels
  • the second data line is not connected to any pixel of the column of pixels
  • the input signal is opposite in polarity and equal in magnitude to the pixel drive signal input by the first data line.
  • each of the second data lines is disposed on the same side of each column of pixels. As shown in FIG.
  • all of the second data lines D1', D2', D3'... are disposed on the left side adjacent to the first data lines D1, D2, D3, .
  • This arrangement can reduce the complexity of the display panel manufacturing, make the panel layout more uniform, and increase the yield.
  • the first data line D1 and the second data line D1' are disposed corresponding to the column pixels.
  • the data line D1 passes through the TFT and the storage capacitor Cst of each pixel of the column.
  • the liquid crystal capacitor Clc is connected.
  • Data Line D1' is independent of data line D1 and is not connected to any of the pixels.
  • each column of pixels corresponds to two data lines Dn (the data line Dn connects the column of pixels, The data line is charged to the pixel and the data line Dn' (the data line Dn' is not connected to any pixel), and the voltage input to the data line Dn' is opposite in polarity and equal in magnitude to the voltage on Dn.
  • the voltage change of the data line Dn′ at any time is equal to the change of the Dn voltage, and the polarity is opposite.
  • the sum of the voltage changes of the two is 0, which can greatly reduce the deviation of the common electrode voltage by the data line coupling.
  • the display effect produced by the general liquid crystal display panel and the display panel of the embodiment of the present application will be described below by taking the voltage on the data line of the write pixel shown in FIG. 2 as an example.
  • horizontal crosstalk may occur on the displayed screen.
  • the horizontal crosstalk phenomenon caused by the coupling of the common electrode voltage Vcom by the data line is explained.
  • the background of the screen is a low grayscale screen
  • the middle window is a reloaded screen of the liquid crystal display panel, and the reloaded screen is in the same frame, the positive polarity voltage waveform is the same, and the negative polarity voltage waveform is also the same.
  • the voltage waveforms of two adjacent data lines Dn and D(n+1) are as shown in FIG. 2(a) and FIG. 2(b), respectively, and the voltage of the data line Dn (hereinafter referred to as Dn voltage).
  • Dn voltage the voltage of the data line Dn
  • the voltage is positive, and the voltage of the data line D(n+1) (hereinafter referred to as D(n+1) voltage) is negative in this frame.
  • the Dn voltage remains at M1
  • the D(n+1) voltage remains at -N2
  • the Vcom voltage remains unchanged.
  • this overloaded picture is taken as an example here, it is not only the horizontal crosstalk phenomenon of such a picture.
  • the data line voltage change in a certain area is not 0 at any time. Both cause a phenomenon in which the common electrode voltage is decoupled by the data line in this region.
  • the D(n+1) voltage is pulled up from -N2 to -N1, and the data line D(n+1)' (hereinafter referred to as D(n+1)' voltage) is lowered from N2 to N1.
  • the change in the D(n+1)' voltage counteracts the coupling effect of the change in the D(n+1) voltage on the common electrode voltage Vcom.
  • the voltage of the two data lines corresponding to each column of pixels is always 0, and the sum of voltage changes is also 0. Further, it can be understood that, under any display screen, since the voltage changes of the two data lines corresponding to each column of pixels are always equal in magnitude, opposite in polarity, and the sum is 0, the coupling of the data lines to the common electrodes in any picture is obtained. Greatly mitigated, thereby reducing the horizontal crosstalk caused by the coupling of the common electrode voltage.
  • a plurality of second data lines, an input signal of the plurality of second data lines, and a pixel driving signal polarity of the column of pixels may be disposed corresponding to each column of pixels.
  • the size is equal, so that the technical effect of the present application can also be achieved, and the horizontal crosstalk phenomenon is effectively improved.
  • the plurality of second data lines are disposed on the same side of each column of pixels, or the second data lines of the even numbers when the second data lines corresponding to the pixels of each column are even It is symmetrically placed at both ends of each column of pixels. This configuration can reduce the complexity of the manufacturing process of the display panel, improve the uniformity of the layout, and increase the yield.
  • liquid crystal display panel of the embodiment of the present application is applicable not only to the column inversion driving method but also to the row inversion driving method, the frame inversion driving method, and the dot inversion driving method.
  • the embodiment of the present application provides a liquid crystal display panel by adding at least one data line corresponding to each column of pixels, and the input signal of the at least one data line changes with the pixel driving signal of each column of pixels.
  • the sum of the variations is 0, so that the phenomenon that the common electrode voltage is deviated by the data line coupling can be largely attenuated, thereby improving the horizontal crosstalk phenomenon in the prior art due to the coupling of the common electrode voltage.
  • FIG. 6 is a schematic structural diagram of a liquid crystal display panel according to another embodiment of the present application, and various constituent structures of the display panel will be described in detail below with reference to FIG. 6.
  • the display panel includes an image display area 100, a data driver 200, and a scan driver 300.
  • the image display area 100 includes an array (also referred to as a pixel area) formed by orthogonally configuring a plurality of data lines (data lines D1, D1' as shown) and a plurality of scan lines, and a plurality of arrays arranged in the array Pixel.
  • the data driver 200 transmits the supplied pixel driving signal to the image display area 100 through a plurality of data lines coupled thereto.
  • the scan driver 300 transmits the supplied scan signal to the image display area 100 through a plurality of scan lines coupled thereto.
  • a second data line is disposed corresponding to each set of adjacent two columns of pixels, the second data line is not connected to the any of the pixels, and the second data line is The input signal is opposite in polarity and equal in magnitude to the pixel drive signals of the two columns of pixels adjacent to the group.
  • each of the second data lines is disposed on the same side of each of the adjacent at least two columns of pixels.
  • all of the second data lines D1', D3', D5'... are disposed on the right side of the first data line adjacent to each group.
  • a data line is added corresponding to each adjacent two columns of pixels, that is, two columns of pixels correspond to three data lines.
  • a data line D1' is added.
  • the corresponding column of pixels is charged through the data lines D1 and D2, so that the first column of pixels is charged to a preset voltage A, and the second column of pixels is charged to a preset voltage B.
  • the other data line D1' is not connected to any pixel, and the input voltage is -(A+B), that is, the voltage on the data line D1' is equal to the sum of the voltages of the data lines D1 and D2, and the polarity phase is anti.
  • the voltage sums on the three data lines D1, D2, and D1' corresponding to the two columns of the first column of pixels and the second column of pixels are always zero, and the sum of voltage changes is also zero.
  • the voltage changes of the three data lines corresponding to each two columns of pixels are always equal in magnitude, opposite in polarity, and the sum is 0, so that the coupling of the data lines to the common electrode voltage is obtained in any picture.
  • the large mitigation reduces the horizontal crosstalk caused by the coupling of the common electrode voltage.
  • one or more second data lines may be set corresponding to each group of adjacent multiple columns (for example, three columns or four columns), and a corresponding one is set.
  • the input signals of the plurality of second data lines are opposite in polarity and equal in magnitude to the pixel driving signals of the adjacent plurality of columns of pixels. This also achieves the technical effect of the present application and effectively improves the horizontal crosstalk phenomenon.
  • the plurality of second data lines are disposed on the same side of each of the adjacent at least two columns of pixels, or the second data line disposed corresponding to at least two columns of pixels adjacent to each group is
  • the second data lines of the even strips are symmetrically disposed at both ends of at least two columns of pixels adjacent to each group. This arrangement can reduce the complexity of the display panel manufacturing, make the panel layout more uniform, and increase the yield.
  • liquid crystal display panel of the embodiment of the present application is applicable not only to the column inversion driving method but also to the row inversion driving method, the frame inversion driving method, and the dot inversion driving method.
  • the embodiment of the present application provides a liquid crystal display panel, wherein at least one data line is added corresponding to at least two columns of pixels adjacent to each group, and the input signal of the at least one data line changes with each group.
  • the sum of the change of the pixel driving signals of the adjacent at least two columns of pixels is 0, so that the phenomenon that the common electrode voltage is deviated by the data line coupling can be weakened to a large extent, thereby improving the prior art due to the common electrode voltage being Horizontal crosstalk caused by coupling.
  • the present application also provides a liquid crystal display including the liquid crystal display panel in the first embodiment or the second embodiment.

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

Abstract

一种液晶显示面板,包括:配置在阵列中的多个像素,阵列由多条数据线(Dn,Dn')和多条扫描线正交配置形成,多条数据线包括:与每列像素对应设置的第一数据线(Dn);与每列像素或每组相邻的至少两列像素对应设置的至少一条第二数据线(Dn'),至少一条第二数据线(Dn')不与任何一列的任一像素连接,且至少一条第二数据线(Dn')的输入信号的变化与每列像素或每组相邻的至少两列像素的像素驱动信号的变化之和为0,使得共电极电压(Vcom)不会偏离预定电压。因此液晶显示面板能够在很大程度上减弱共电极电压(Vcom)被数据线耦合而产生偏离的现象,从而改善现有技术中由于共电极电压(Vcom)被耦合而引起的水平串扰。

Description

液晶显示面板
本申请要求享有2014年9月29日提交的名称为“液晶显示面板”的中国专利申请CN201410514024.9的优先权,其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,尤其涉及一种液晶显示面板。
背景技术
在薄膜晶体管-液晶显示器(TFT-LCD)领域,为了克服配向膜的直流阻绝效应以及使得液晶能够进行方向性极化,需要采用极性反转的驱动方式来驱动液晶,其中列反转由于更加省电,具有更好的充电率,大尺寸面板往往采用这种驱动方式。
列反转驱动方式表现为,相邻数据线上对应的子像素以列为单位进行正负极性反转。这种驱动方式,使得相邻两列的闪烁波形之间存在π相位差,在一定程度上起到了抑制闪烁的作用。
图1是现有技术中的液晶显示面板的结构示意图,其中示出了采用列反转驱动方式的驱动结构。如图1所示,当输入扫描信号时,连接在同一扫描线上的所有TFT打开,将数据线上的像素驱动信号存储于像素内部的存储电容Cst和液晶电容Clc中。接着将此条扫描线上的所有TFT关闭,将下一条扫描线上的所有TFT打开,数据线上的电压改为此条扫描线上像素所需的数据电压。
然而,因为数据线和上板共电极以及下板共电极存在寄生电容Cpc,这样,在电容耦合效应的作用下,会影响到共电极电压Vcom的波形变化,使得共电极电压Vcom波形偏离预设的直流波形(参照图2(c))。当像素电极通过数据线存储像素信号时,若共电极电压Vcom受各个数据线的耦合效应而偏离了预设电压,此时此行扫描线上像素的液晶两端压差偏离了预设的压差,从而使得像素显示的并非为预计的灰阶,从而产生了水平串扰现象(参照图3)。
现有一些显示面板采用1G2D架构来做低色差(Low color shift)设计,像素的主区与子区通过极性相反的两根数据线进行充电。虽然此种设计在一定程度上能够减弱数据线 对共电极的耦合效应,然而,由于这种低色差设计中的某种设计需求,且受到馈通(Feed through)电压的影响,因此也会在一定程度上产生数据线对共电极的耦合效应,使得共电极电压Vcom发生偏离。因此,1G2D架构依然会产生共电极被耦合而产生的水平串扰现象。
发明内容
本发明所要解决的技术问题之一是需要提供一种能够改善水平串扰现象的液晶显示面板。
为了解决上述技术问题,本申请的实施例首先提供了一种液晶显示面板,包括:配置在阵列中的多个像素,所述阵列由多条数据线和多条扫描线正交配置形成,所述多条数据线包括:与每列像素对应设置的第一数据线,所述第一数据线与该列像素的每一像素连接并通过该第一数据线向该列像素输入像素驱动信号;与每列像素或每组相邻的至少两列像素对应设置的至少一条第二数据线,所述至少一条第二数据线不与任何一列的任一像素连接,且所述至少一条第二数据线的输入信号的变化与所述每列像素或每组相邻的至少两列像素的像素驱动信号的变化之和为0,使得共电极电压不会偏离预定电压。
优选地,在与每列像素对应设置的第二数据线为一条时,该条第二数据线的输入信号与该列像素的像素驱动信号极性相反、大小相等。
优选地,每条第二数据线均被设置在每列像素的同一侧。
优选地,在与每列像素对应设置的第二数据线为多条时,这些多条的第二数据线的输入信号与该列像素的像素驱动信号极性相反、大小相等。
优选地,所述这些多条的第二数据线被设置在每列像素的同一侧,或者,在与每列像素对应设置的第二数据线为偶数条时,这些偶数条的第二数据线被对称设置在每列像素的两端。
优选地,在与每组相邻的至少两列像素对应设置的第二数据线为一条时,该条第二数据线的输入信号与该组相邻的至少两列像素的像素驱动信号极性相反、大小相等。
优选地,每条第二数据线均被设置在每组相邻的至少两列像素的同一侧。
优选地,在与每组相邻的至少两列像素对应设置的第二数据线为多条时,这些多条的第二数据线的输入信号与该组相邻的至少两列像素的像素驱动信号极性相反、大小相等。
优选地,所述这些多条的第二数据线被设置在每组相邻的至少两列像素的同一侧,或者,在与每组相邻的至少两列像素对应设置的第二数据线为偶数条时,这些偶数条的第二数据线被对称设置在与每组相邻的至少两列像素的两端。
优选地,所述液晶显示面板适应于列反转驱动方式、行反转驱动方式、帧反转驱动方式和点反转驱动方式。
本申请的实施例还提供了一种液晶显示器,其包括上述的液晶显示面板。
与现有技术相比,上述方案中的一个或多个实施例可以具有如下优点或有益效果:
本申请实施例提供了一种液晶显示面板,通过在每列像素或每组相邻的至少两列像素对应增加了至少一条数据线,并且该至少一条数据线的输入信号的变化与每列像素或每组相邻的至少两列像素的像素驱动信号的变化之和为0,因此能够在很大程度上减弱共电极电压被数据线耦合而产生偏离的现象,从而改善现有技术中由于共电极电压被耦合而引起的水平串扰。
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的技术方案而了解。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和/或流程来实现和获得。
附图说明
附图用来提供对本申请的技术方案或现有技术的进一步理解,并且构成说明书的一部分。其中,表达本申请实施例的附图与本申请的实施例一起用于解释本申请的技术方案,但并不构成对本申请技术方案的限制。
图1为现有技术的液晶显示面板的结构示意图。
图2(a)、(b)、(c)分别为数据线Dn上的电压波形图、数据线D(n+1)上的电压波形图以及耦合效应所产生的共电极电压Vcom偏离的波形示意图。
图3为现有技术的液晶显示面板的水平串扰示例图。
图4为本申请实施例的液晶显示面板的结构示意图。
图5为在重载画面下施加到图4所示液晶显示面板上的数据线电压和共电极电压的波形图。
图6为本申请另一实施例的液晶显示面板的结构示意图。
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问题,并达成相应技术效果的实现过程能充分理解并据以实施。本申请实施例以及实施例中的各个特征,在不相冲突前提下可以相互结合,所形成的技术方案均在本发明的保护范围之内。
为了解决现有技术中液晶显示面板显示时可能产生的水平串扰问题,本申请实施例提供了一种液晶显示面板,通过在每列像素或每组相邻的至少两列像素对应增加了至少一条数据线,并且该至少一条数据线的输入信号的变化与每列像素或每组相邻的至少两列像素的像素驱动信号的变化之和为0,因此能够在很大程度上减弱共电极电压被数据线耦合而产生偏离的现象,从而改善现有技术中由于共电极电压被耦合而引起的水平串扰现象。
第一实施例
图4是本申请实施例的液晶显示面板的结构示意图。如图4所示,该显示面板包括影像显示区100、数据驱动器200以及扫描驱动器300。影像显示区100包括由多条数据线(如图所示的数据线D1、D1′)与多条扫描线正交配置形成的阵列(也可称为像素区)以及配置在阵列中的多个像素。数据驱动器200通过与其耦接的多条数据线将所提供的像素驱动信号传输至影像显示区100中。扫描驱动器300通过与其耦接的多条扫描线将所提供的扫描信号传输至影像显示区100中。
下面详细说明本申请实施例的液晶显示面板的驱动结构。如图4所示,对应每列像素设置了两条数据线,为了便于说明,此处称为第一数据线和第二数据线。其中,第一数据线与该列像素的每一像素连接并通过第一数据线向该列像素输入像素驱动信号,第二数据线不与该列像素的任一像素连接,且第二数据线的输入信号与第一数据线所输入的像素驱动信号极性相反、大小相等。优选地,每条第二数据线均被设置在每列像素的同一侧。如图4所示,所有的第二数据线D1′、D2′、D3′…被设置在与第一数据线D1、D2、D3…相邻的左侧。这种设置方式能够降低显示面板制造的复杂度,使得面板布局更加均匀化,且提高产量。
以第一列像素为例,对应该列像素设置了第一数据线D1和第二数据线D1′,如图4所示,数据线D1通过TFT与该列的每个像素的存储电容Cst和液晶电容Clc连接。数据 线D1′独立于数据线D1,不与任一像素连接。数据线D1和数据线D1′进行信号传输时,均与上板共电极以及下板共电极存在寄生电容Cpc,数据线D1和D1′的变化均会对共电极电压有耦合效应。
然而,与现有技术中的一般液晶显示面板相比,本申请实施例不仅在每列像素上增加了一条数据线,即每列像素对应两条数据线Dn(数据线Dn连接该列像素,通过该数据线向像素充电)和数据线Dn′(数据线Dn′不连接任何像素),而且,数据线Dn′所输入的电压与Dn上的电压极性相反、大小相等。这样使得任意时刻的数据线Dn’的电压变化与Dn电压变化大小相等,极性相反,二者的电压变化总和为0,能够在很大程度上减弱共电极电压被数据线耦合而产生偏离的现象,从而改善由于共电极电压被耦合而引起的水平串扰。也就是说,虽然,数据线D1和D1′均与上板共电极以及下板共电极存在寄生电容Cpc,但是两个寄生电容Cpc所产生的耦合效应大小相等,方向相反,会相互抵消,进而使得共电极电压不会偏离预定电压。
下面以图2所示的写入像素的数据线上的电压为例,对比说明一般液晶显示面板和本申请实施例的显示面板所产生的显示效果。
(1)对于一般液晶显示面板来说,其显示的画面会出现水平串扰现象。
以常见的重载画面下水平串扰现象为例,来说明共电极电压Vcom被数据线耦合而引起的水平串扰现象。该画面的背景为低灰阶画面,中间窗口为液晶显示面板的重载画面,且该重载画面在同一帧下,正极性电压波形相同,负极性电压波形也相同。
在某一帧内,相邻的两根数据线Dn和D(n+1)的电压波形分别如图2(a)和图2(b)所示,数据线Dn的电压(以下简称Dn电压)在此帧内为正极性,数据线D(n+1)的电压(以下简称D(n+1)电压)在此帧内为负极性。
在t1至t4时刻,Dn电压一直保持为M1,D(n+1)电压一直保持为-N2,Vcom电压保持不变。
在t4时刻,Dn电压突然由M1升高至M2,D(n+1)电压突然从-N2升高至-N1,Dn电压与D(n+1)电压同时升高,使得数据线与共电极之间存在寄生电容Cpc(参照图1),由于电容Cpc的耦合效应,使得共电极电压Vcom此时也被拉高,如图2(c)所示。
同样,在t5时刻,Dn电压突然由M2下降到M1,D(n+1)电压突然从-N1下降到-N2,Dn电压与D(n+1)电压同时降低,使得共电极电压Vcom被拉低,如图2(c)所示。
该重载画面下,所有正极性电压波形均与数据线Dn的类似,所有负极性电压波形均与数据线D(n+1)的类似,则所有数据线上的电压的变化均会导致共电极电压Vcom向上拉升或向下拉降,使得面板内共电极电压Vcom发生偏离,从而产生水平串扰现象。
需要指出的是,虽然此处以此重载画面为例来说明的,但是并不仅仅是此类画面才会发生水平串扰现象,实际上,任何时刻某一区域内数据线电压变化不为0时,均会引起此区域内共电极电压被数据线耦合而发生偏离的现象。
(2)对于本申请实施例的液晶显示面板来说,其能够有效地改善水平串扰现象。
以相邻的两条连接像素的数据线Dn与D(n+1)为例,如图5所示,在t4时刻,数据线Dn的电压突然从M1升高至M2,此时数据线Dn′的电压(以下简称Dn′电压)同时从-M1降低至-M2。由于Dn′电压的变化与Dn电压的变化大小相等、极性相反,因此抵消了数据线Dn的电压变化对共电极Vcom的耦合效应。
同样地,在t4时刻,D(n+1)电压从-N2拉高至-N1,数据线D(n+1)′(以下简称D(n+1)′电压)从N2降低至N1,D(n+1)′电压的变化抵消了D(n+1)电压的变化对共电极电压Vcom的耦合效应。
同样道理,在t5时刻,Dn电压突然从M2降低至M1,D(n+1)电压突然从-N1降低至-N2,由于Dn′电压变化与Dn电压变化大小相等、极性相反,而且数据线D(n+1)′的电压变化与D(n+1)电压变化大小相等、极性相反,从而使得数据线电压变化之和为0。
由图5可知,本申请实施例的液晶显示面板,使得每列像素所对应的两条数据线电压和总是为0,电压变化之和也为0。进而,可以理解得到,在任何显示画面下,由于每一列像素对应的两根数据线电压变化总是大小相等、极性相反、总和为0,使得任何画面下数据线对共电极的耦合都得到很大的减轻,从而减弱了由于共电极电压被耦合而引起的水平串扰现象。
然而,容易理解,本申请并不限于上述实施例,例如,还可以对应于每列像素设置多条第二数据线,多条第二数据线的输入信号与该列像素的像素驱动信号极性相反、大小相等,这样也能够实现本申请的技术效果,有效改善水平串扰现象。而且,优选地,这些多条的第二数据线被设置在每列像素的同一侧,或者,在与每列像素对应设置的第二数据线为偶数条时,这些偶数条的第二数据线被对称设置在每列像素的两端。这种配置方式能够降低显示面板制造过程的复杂度,提高布局的均与性,且提升产量。
另外,本申请实施例的液晶显示面板不仅适用于列反转驱动方式也适用于行反转驱动方式、帧反转驱动方式和点反转驱动方式。
综上所述,本申请实施例提供了一种液晶显示面板,通过在每列像素对应增加了至少一条数据线,并且该至少一条数据线的输入信号的变化与每列像素的像素驱动信号的变化之和为0,因此能够在很大程度上减弱共电极电压被数据线耦合而产生偏离的现象,从而改善现有技术中由于共电极电压被耦合而引起的水平串扰现象。
第二实施例
图6为本申请另一实施例的液晶显示面板的结构示意图,下面参照图6来详细说明该显示面板的各个组成结构。
如图6所示,该显示面板包括影像显示区100、数据驱动器200以及扫描驱动器300。影像显示区100包括由多条数据线(如图所示的数据线D1、D1′)与多条扫描线正交配置形成的阵列(也可称为像素区)以及配置在阵列中的多个像素。数据驱动器200通过与其耦接的多条数据线将所提供的像素驱动信号传输至影像显示区100中。扫描驱动器300通过与其耦接的多条扫描线将所提供的扫描信号传输至影像显示区100中。
下面详细说明本申请实施例的液晶显示面板的驱动结构。
与上一实施例不同的是,在本实施例中,对应于每组相邻两列像素设置了一条第二数据线,该第二数据线不与该任一像素连接,且第二数据线输入的信号与该组相邻的两列像素的像素驱动信号极性相反、大小相等。优选地,每条第二数据线均被设置在每组相邻的至少两列像素的同一侧。如图6所示,所有的第二数据线D1′、D3′、D5′…被设置在与每组相邻的第一数据线的右侧。这种设置方式能够降低显示面板制造的复杂度,使得面板布局更加均匀化,且提高产量。
如图6所示,本申请实施例在现有的液晶显示面板的驱动结构的基础上,对应每相邻两列像素增加一条数据线,即两列像素对应三条数据线。以相邻的第一列像素和第二列像素为例,除了连接这两列像素的数据线D1与D2之外,还增加了一条数据线D1′。
通过数据线D1与D2向相应列像素充电,使第一列像素充电达到预设电压A,第二列像素充电达到预设电压B。另外一条数据线D1′不连接任何像素,其所输入的电压为-(A+B),即该条数据线D1′上的电压与数据线D1与D2的电压之和大小相等,极性相 反。这样在任何时刻,第一列像素和第二列像素这两列像素所对应的三条数据线D1、D2和D1′上的电压和总是为0,电压变化之和也为0。
可以理解得到,在任何显示画面下,每两列像素对应的三根数据线电压变化总是大小相等、极性相反、总和为0,使得在任何画面下数据线对共电极电压的耦合都得到很大减轻,从而减弱了由于共电极电压被耦合而引起的水平串扰。
然而,容易理解,本申请并不限于上述实施例,例如,还可以对应于每组相邻的多列(例如三列或四列)像素设置一条或多条第二数据线,对应设置的一条或多条第二数据线的输入信号与该组相邻的多列像素的像素驱动信号极性相反、大小相等。这样也能够实现本申请的技术效果,有效改善水平串扰现象。而且,优选地,这些多条的第二数据线被设置在每组相邻的至少两列像素的同一侧,或者,在与每组相邻的至少两列像素对应设置的第二数据线为偶数条时,这些偶数条的第二数据线被对称设置在与每组相邻的至少两列像素的两端。这种设置方式能够降低显示面板制造的复杂度,使得面板布局更加均匀化,且提高产量。
另外,本申请实施例的液晶显示面板不仅适用于列反转驱动方式也适用于行反转驱动方式、帧反转驱动方式和点反转驱动方式。
综上所述,本申请实施例提供了一种液晶显示面板,通过在每组相邻的至少两列像素对应增加了至少一条数据线,并且该至少一条数据线的输入信号的变化与每组相邻的至少两列像素的像素驱动信号的变化之和为0,因此能够在很大程度上减弱共电极电压被数据线耦合而产生偏离的现象,从而改善现有技术中由于共电极电压被耦合而引起的水平串扰现象。
另外,本申请还提供了一种液晶显示器,其包括第一实施例或第二实施例中的液晶显示面板。
以上所述,仅为本发明的具体实施案例,本发明的保护范围并不局限于此,任何熟悉本技术的技术人员在本发明所述的技术规范内,对本发明的修改或替换,都应在本发明的保护范围之内。

Claims (10)

  1. 一种液晶显示面板,包括:
    配置在阵列中的多个像素,所述阵列由多条数据线和多条扫描线正交配置形成,所述多条数据线包括:
    与每列像素对应设置的第一数据线,所述第一数据线与该列像素的每一像素连接并通过该第一数据线向该列像素输入像素驱动信号;
    与每列像素或每组相邻的至少两列像素对应设置的至少一条第二数据线,所述至少一条第二数据线不与任何一列的任一像素连接,且所述至少一条第二数据线的输入信号的变化与所述每列像素或每组相邻的至少两列像素的像素驱动信号的变化之和为0,使得共电极电压不会偏离预定电压。
  2. 根据权利要求1所述的液晶显示面板,其中,
    在与每列像素对应设置的第二数据线为一条时,该条第二数据线的输入信号与该列像素的像素驱动信号极性相反、大小相等。
  3. 根据权利要求2所述的液晶显示面板,其中,
    每条第二数据线均被设置在每列像素的同一侧。
  4. 根据权利要求1所述的液晶显示面板,其中,
    在与每列像素对应设置的第二数据线为多条时,这些多条的第二数据线的输入信号与该列像素的像素驱动信号极性相反、大小相等。
  5. 根据权利要求3所述的液晶显示面板,其中,
    所述这些多条的第二数据线被设置在每列像素的同一侧,或者,
    在与每列像素对应设置的第二数据线为偶数条时,这些偶数条的第二数据线被对称设置在每列像素的两端。
  6. 根据权利要求1所述的液晶显示面板,其中,
    在与每组相邻的至少两列像素对应设置的第二数据线为一条时,该条第二数据线的输入信号与该组相邻的至少两列像素的像素驱动信号极性相反、大小相等。
  7. 根据权利要求6所述的液晶显示面板,其中,
    每条第二数据线均被设置在每组相邻的至少两列像素的同一侧。
  8. 根据权利要求1所述的液晶显示面板,其中,
    在与每组相邻的至少两列像素对应设置的第二数据线为多条时,这些多条的第二数据线的输入信号与该组相邻的至少两列像素的像素驱动信号极性相反、大小相等。
  9. 根据权利要求8所述的液晶显示面板,其中,
    所述这些多条的第二数据线被设置在每组相邻的至少两列像素的同一侧,或者,
    在与每组相邻的至少两列像素对应设置的第二数据线为偶数条时,这些偶数条的第二数据线被对称设置在与每组相邻的至少两列像素的两端。
  10. 根据权利要求1所述的液晶显示面板,其中,
    所述液晶显示面板适应于列反转驱动方式、行反转驱动方式、帧反转驱动方式和点反转驱动方式。
PCT/CN2014/089011 2014-09-29 2014-10-21 液晶显示面板 WO2016049951A1 (zh)

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CN106782390A (zh) * 2016-12-30 2017-05-31 深圳市华星光电技术有限公司 用于驱动显示面板的方法、显示面板及装置
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