WO2016187909A1 - 一种液晶显示面板及其驱动方法 - Google Patents

一种液晶显示面板及其驱动方法 Download PDF

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Publication number
WO2016187909A1
WO2016187909A1 PCT/CN2015/081673 CN2015081673W WO2016187909A1 WO 2016187909 A1 WO2016187909 A1 WO 2016187909A1 CN 2015081673 W CN2015081673 W CN 2015081673W WO 2016187909 A1 WO2016187909 A1 WO 2016187909A1
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sub
pixel unit
voltage
liquid crystal
pixel
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PCT/CN2015/081673
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English (en)
French (fr)
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孙博
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深圳市华星光电技术有限公司
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Priority to US14/785,986 priority Critical patent/US20170148409A1/en
Publication of WO2016187909A1 publication Critical patent/WO2016187909A1/zh

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    • 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
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    • 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
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    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • 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
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    • 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
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Definitions

  • the present invention relates to the field of display of liquid crystal displays, and more particularly to a liquid crystal display panel and a driving method thereof.
  • VA liquid crystal displays have gained more and more popular applications due to their wide viewing angle, high contrast, and no need for friction alignment.
  • the VA liquid crystal display performs domain processing on the liquid crystal layer to tilt the negative liquid crystal molecules in a vertical state under the action of the voltage applied by the two substrates, thereby achieving the purpose of improving the viewing angle and color shift of the liquid crystal display.
  • the eight-domain display liquid crystal display is generally realized by controlling the rotation angle ⁇ of the liquid crystal molecules.
  • 1 is a schematic structural view of a pixel unit of a liquid crystal display panel that realizes eight-domain display in the prior art.
  • the pixel unit is further divided into two sub-pixel units, and the principle that the eight-domain display can be realized is that firstly, switching elements connected to the same scanning line and the same data line in the pixel unit are respectively used (switching elements usually use thin film transistors) TFT1 and TFT2 storage capacitor C st-1 and C st-2 charged to the same voltage, then close the circuit switching elements TFT1 and TFT2 and switch element TFT3, the storage capacitor C st-2 supplied through the TFT3 and the capacitor C down Discharging, thereby reducing the pixel voltage of the sub-pixel unit including C st-2 , causing the rotation angle ⁇ of the liquid crystal molecules in the two sub-pixel units to be different to realize eight-domain display, thereby improving the viewing angle and color shift of the large-sized liquid crystal display. .
  • the liquid crystal display displayed in the above manner may have more noticeable picture flicker and image sticking.
  • One of the technical problems to be solved by the present invention is to provide a new method for realizing an eight-domain display of a liquid crystal display.
  • an embodiment of the present application first provides a liquid crystal display panel, including an array substrate, wherein the array substrate is arranged with a plurality of scan lines, a plurality of data lines, and a plurality of pixel units, wherein each The pixel units are composed of a first sub-pixel unit and a second sub-pixel unit that share the same data line and respectively use different scan lines, and the first sub-pixel unit is turned on by the scan voltage on the first scan line, and receives data.
  • the data signal of the line has a first pixel voltage; the second sub-pixel unit is turned on by the scan voltage on the second scan line during the driving period of the first sub-pixel unit, and receives the data signal of the data line to have the second a pixel voltage; wherein driving of the second sub-pixel unit is completed within a driving period of the first sub-pixel unit.
  • the first sub-pixel unit comprises a first switching element and a first storage capacitor
  • the first switching element comprises a control end, a signal input end and a signal output end, the control end and the first scan line
  • the signal input terminal is electrically connected to the data line
  • the signal output end is electrically connected to one end of the first storage capacitor
  • the other end of the first storage capacitor is electrically connected to the common electrode.
  • the second sub-pixel unit comprises a second switching element and a second storage capacitor
  • the second switching element comprises a control end, a signal input end and a signal output end, the control end and the second scan line
  • the signal input terminal is electrically connected to the data line
  • the signal output end is electrically connected to one end of the second storage capacitor
  • the other end of the second storage capacitor is electrically connected to the common electrode.
  • the switching element comprises a thin film transistor.
  • the area of the first sub-pixel unit is smaller than the area of the second sub-pixel unit.
  • the embodiment of the present application further provides a driving method of a liquid crystal display panel, comprising: Step 1: using a scan voltage of a first scan line to turn on a first sub-pixel unit, and using a data signal of the data line to the first sub-pixel The pixel unit is charged to reach the first pixel voltage; and step 2, the second sub-pixel unit is turned on by using the scan voltage of the second scan line during the driving period of the first sub-pixel unit, and the data signal of the data line is used to The second sub-pixel unit is charged to reach a second pixel voltage; wherein driving of the second sub-pixel unit is completed within a driving period of the first sub-pixel unit.
  • the driving period of the second sub-pixel unit is three quarters of the driving period of the first sub-pixel unit.
  • the scan voltage of the first scan line is equal to the voltage value of the scan voltage of the second scan line.
  • the potential of the common electrode is adjusted in accordance with the primary coupling voltage.
  • FIG. 1 is a schematic structural diagram of a pixel unit of a liquid crystal display panel that realizes eight-domain display in the prior art
  • FIG. 2 is a schematic structural diagram of a pixel unit of a liquid crystal display panel according to an embodiment of the present application
  • FIG. 3 is a schematic flow chart of a driving method of a liquid crystal display panel according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of driving timing of a liquid crystal display panel according to an embodiment of the present application.
  • the pixel unit in Fig. 1 is divided into two sub-pixel units, as shown in the area surrounded by two rectangular dotted lines, respectively.
  • the sub-pixel unit 11 includes a switching element TFT1 and a storage capacitor C st-1
  • a liquid crystal capacitor C lc-1 equivalent to the liquid crystal layer between the two substrates is also indicated in the sub-pixel unit 11 .
  • the sub-pixel unit 12 includes a switching element TFT2 and a storage capacitor Cst-2 .
  • a liquid crystal capacitor Clc-2 equivalent to the liquid crystal layer between the two substrates is also indicated in the sub-pixel unit 12.
  • the sub-pixel unit 12 is also provided with a switching element and a shared TFT3 capacitor C down.
  • the specific process of the eight-domain display of the pixel unit is that first, the switching elements TFT1 and TFT2 are driven to be turned on by the scan line 14, and the data lines 13 simultaneously charge the storage capacitors Cst-1 and Cst-2 through the TFT1 and the TFT2, respectively, and The storage capacitors C st-1 and C st-2 are charged to the same voltage value. Since the pixel voltage of the liquid crystal pixel applied to the sub-pixel unit 11 at this time is equal to the pixel voltage of the liquid crystal pixel applied to the sub-pixel unit 12, the liquid crystal molecules located in the sub-pixel unit 11 are located in the sub-pixel unit 12 The liquid crystal molecules have the same rotation angle ⁇ .
  • the scanning line 14 After the end of charging, the scanning line 14 returns to the low level, and the switching elements TFT1 and TFT2 are turned off. Is then opened by the switching element TFT3 within 15 drives the sub-shared scanning lines of the pixel unit 12, the shared capacitor C down the storage capacitor C st-2 in parallel, while the storage capacitor C st-2 shared capacitance C down charging, its own voltage reduction .
  • the pixel voltage of the liquid crystal pixel applied to the sub-pixel unit 11 will be higher than the pixel voltage of the liquid crystal pixel applied to the sub-pixel unit 12, and the rotation angle ⁇ of the liquid crystal molecules in the two sub-pixel units is no longer the same, thereby realizing the liquid crystal.
  • the liquid crystal display using the AC drive method requires a certain compensation for the coupling voltage V ft caused by the parasitic capacitance.
  • the scanning voltage on the scan line 14 passes through the parasitic capacitance Cgd-1 of the TFT1 and the parasitic capacitance Cgd-2 of the TFT2 to the storage capacitor Cst-1 and The voltage of C st-2 has an effect, which is recorded as the influence of the primary coupling voltage V ft-1 .
  • the compensation method for the coupling voltage in the prior art is performed synchronously for two sub-pixel units, and the secondary coupling voltage V ft-2 only affects the voltage of the storage capacitor C st-2 , and exists only in the sub-pixel unit 12 .
  • the compensation amount for the coupling voltage of the sub-pixel unit 11 and the sub-pixel unit 12 will be different, thereby causing the same gray scale voltage corresponding to the positive and negative voltages during AC driving. There is a difference that causes the liquid crystal display to flicker when it is displayed.
  • a new liquid crystal display panel is proposed in the embodiment of the present application.
  • a plurality of scan lines, a plurality of data lines and a plurality of pixel units are arranged on the array substrate, wherein the structure of each pixel unit is as shown in FIG. 2, and each pixel unit shares the same data line and uses different
  • the first sub-pixel unit and the second sub-pixel unit of the scan line are formed, wherein the first sub-pixel unit is turned on by the scan voltage of the first scan line, and receives the data signal of the data line to have the first pixel voltage.
  • the second sub-pixel unit is turned on by the scan voltage of the second scan line during the driving period of the first sub-pixel unit, and receives the data signal of the data line to have the second pixel voltage.
  • the first sub-pixel unit 21 includes a first switching element TFT1 and a first storage capacitor C st-1 .
  • the control end of the first switching element TFT1 is electrically connected to the first scan line 24, the signal input end of the TFT1 is electrically connected to the data line 23, and the signal output end of the TFT1 is electrically connected to one end of the first storage capacitor Cst-1 .
  • the other end of the first storage capacitor Cst-1 is electrically connected to the common electrode 26.
  • the second sub-pixel unit 22 includes a second switching element TFT2 and a second storage capacitor Cst-2 .
  • the control end of the second switching element TFT2 is electrically connected to the second scan line 25, the signal input end of the TFT2 is electrically connected to the data line 23, and the signal output end of the TFT2 is electrically connected to one end of the second storage capacitor Cst-2 .
  • the other end of the second storage capacitor Cst-2 is electrically connected to the common electrode 26.
  • liquid crystal capacitors C lc-1 and C lc-2 equivalent to the liquid crystal layer between the two substrates are also shown in the first sub-pixel unit 21 and the second sub-pixel unit 22, respectively.
  • One ends of the liquid crystal capacitors C lc-1 and C lc-2 are electrically connected to the signal output ends of the TFT 1 and the TFT 2, respectively, and the other end is electrically connected to the common electrode.
  • the trace of the common electrode 26 is not shown in FIG.
  • the common electrodes to which the storage capacitors C st-1 and C st-2 are connected are located on the array substrate, and the common electrodes to which the liquid crystal capacitors C lc-1 and C lc-2 are connected are located on the other substrate, and both have the same potential.
  • the area of the first sub-pixel unit in the pixel unit is smaller than the area of the second sub-pixel unit.
  • the area of the second sub-pixel unit is approximately twice the area of the first sub-pixel unit, a better effect of improving the color shift can be obtained.
  • the first storage capacitor C st-1 of the first sub-pixel unit, the liquid crystal capacitor C lc-1 and the second storage capacitor C st-2 of the second sub-pixel unit, and the liquid crystal capacitor C lc- One of the plates of 2 is connected to the common electrode so that the generated coupling voltages do not overlap each other.
  • This structure is advantageous for reducing the cross-effect of parasitic capacitance.
  • the structure of the pixel unit of the embodiment of the present application is more convenient for compensating for the primary coupling voltage Vft-1 .
  • the improvement of the structure of the pixel unit simplifies the process steps of fabricating the array substrate, The substrate reliability is further improved while the substrate production efficiency is improved.
  • the improvement of the structure of the pixel unit increases the aperture ratio of the second sub-pixel unit, which is advantageous for improving the display effect of the liquid crystal display.
  • the embodiment of the present application further provides a driving method of the liquid crystal display panel, which will be described below with reference to FIG. 3 and FIG. 4.
  • the driving method of the embodiment of the present application includes: in step S310, turning on a first sub-pixel unit by using a scan voltage of a first scan line, and charging the first sub-pixel unit by using a data signal of the data line, Bringing it to the first pixel voltage; step S320, turning on the second sub-pixel unit by using the scan voltage of the second scan line during the driving period of the first sub-pixel unit, and using the data signal of the data line to the second sub-pixel The unit is charged to reach the second pixel voltage.
  • the driving of the second sub-pixel unit is completed during the driving period of the first sub-pixel unit.
  • the driving method of the embodiment of the present application obtains different pixel voltages by adjusting charging times of the first storage capacitor Cst-1 and the second storage capacitor Cst-2 . Further, the driving period of the first sub-pixel unit is determined according to the rotation angle ⁇ 1 of the liquid crystal molecules inside the first sub-pixel unit, and the driving period of the second sub-pixel unit is according to the rotation angle ⁇ of the liquid crystal molecules inside the second sub-pixel unit. 2 OK.
  • the effective address period refers to the turn-on time allowed for each pixel unit determined according to the pixels of the liquid crystal display and the refresh rate of each frame of the picture. For example, when the resolution of the liquid crystal display is 1024*768, the on-time allowed for each row of pixel units is 21.7 ⁇ s, that is, the effective address period is 21.7 ⁇ s.
  • a scan voltage is applied to the first scan line 24, the scan voltage turns on the first switching element TFT1 in the first sub-pixel unit, and the signal voltage on the data line 23 is opposite to the first storage capacitor C st -1 for charging.
  • a scan voltage is applied to the second scan line 25, and the scan voltage is a second switching element in the second sub-pixel unit.
  • the TFT 2 is turned on while the signal voltage on the data line 23 charges the second storage capacitor C st-2 .
  • the voltage values of the scanning voltages of the first scanning line 24 and the second scanning line 25 are equal, and at the same time return to the low level at time t2, and the charging of the storage capacitors Cst-1 and Cst-2 is ended.
  • step S310 and step S320 can be performed simultaneously.
  • TFT1 and TFT2 may be turned on by simultaneously applying a driving voltage to the second scanning line 25 through the first scanning line 24 at time t0, and the TFT2 is turned off before the TFT1 at the time of (t0+b).
  • the TFT 2 is turned on by the second scanning line 25 at a certain time between the time t0 and the time t1 and is turned off before the TFT1.
  • the driving period of the first sub-pixel unit is greater than the driving period of the second sub-pixel unit.
  • the driving period b of the second sub-pixel unit is three-quarters of the driving period a of the first sub-pixel unit, and the illuminance per unit area of the first sub-pixel unit is higher than that of the second sub-pixel unit. The illuminance per unit area can obtain a better display effect.
  • the driving method of the embodiment of the present application can be used to drive a high-resolution liquid crystal display panel.
  • the TFT3 is turned on to discharge the second storage capacitor Cst-2 .
  • the driving process of the second sub-pixel unit is completed during the driving period of the first sub-pixel unit, and the first sub-pixel unit does not occupy an effective addressing period.
  • the current driving module can be used to drive more pixel units, thereby improving The resolution of the liquid crystal display.
  • the driving method of the embodiment of the present application further includes the step of adjusting the potential of the common electrode according to the primary coupling voltage Vft-1 .
  • the storage capacitor C st-1 , the liquid crystal capacitor C lc-1 of the first sub-pixel unit, the storage capacitor C st-2 of the second sub-pixel unit, and the liquid crystal capacitor C lc-2 of the first sub-pixel unit of the embodiment of the present application One of the plates is connected to the common electrode, and this structure can easily compensate for the influence of the primary coupling voltage by adjusting the potential V com of the common electrode.
  • the asymmetric positive and negative frame images in the AC drive can be compensated by adjusting the potential V com of the common electrode, so that it is not necessary to adopt a complicated multi-step driving method for the pixel unit, only A second-order driving method is used to drive the pixel unit to achieve a satisfactory display effect.
  • the primary coupling voltages at the first sub-pixel unit and the second sub-pixel unit are also substantially equal, further reducing the difference of the V com compensation amount of the first sub-pixel unit and the second sub-pixel unit, which is beneficial to improving the display effect of the liquid crystal display. .

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Abstract

一种液晶显示面板及其驱动方法。液晶显示面板包括阵列基板。阵列基板上排布有多条扫描线、多条数据线与多个像素单元。每个像素单元由共用同一条数据线（13）且分别使用不同扫描线（24、25）的第一子像素单元（21）和第二子像素单元（22）组成。第一子像素单元（21）由第一扫描线（24）的扫描电压开启，并接收数据线（23）的数据信号而具有第一像素电压。第二子像素单元（22）在第一子像素单元（21）的驱动期间内由第二扫描线（25）的扫描电压开启，并接收数据线（23）的数据信号而具有第二像素电压。第二子像素单元（22）的驱动于第一子像素单元（21）的驱动期间内完成。该液晶显示面板可以消除交流驱动中二次耦合电压对液晶显示器的影响，增加像素单元的开口率，有利于改善液晶显示器的显示效果。

Description

一种液晶显示面板及其驱动方法
相关申请的交叉引用
本申请要求享有2015年05月26日提交的名称为“一种液晶显示面板及其驱动方法”的中国专利申请CN201510273789.2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器的显示领域，尤其涉及一种液晶显示面板及其驱动方法。
背景技术
近年来，垂直配向(Vertical Alignment，VA)液晶显示器以其广视角、高对比度以及无须摩擦配向等优势获得了越来越普遍的应用。VA液晶显示器通过对液晶层进行分畴处理，使处于垂直状态的负性液晶分子在两基板所施加的电压的作用下发生倾斜，进而达到改善液晶显示器的视角和色偏的目的。
由于在物理上最多只能形成四畴显示，所以八畴显示的液晶显示器一般通过控制液晶分子的转动角度Φ来实现。图1为现有技术中实现八畴显示的液晶显示面板的像素单元的结构示意图。该像素单元进一步分为两个子像素单元，其可以实现八畴显示的原理是，首先分别通过像素单元中连接于同一条扫描线与同一条数据线的开关元件(开关元件通常使用薄膜晶体管)TFT1和TFT2将存储电容Cst-1和Cst-2充电到相等的电压，再关闭开关元件TFT1和TFT2并打开开关元件TFT3，则存储电容Cst-2将通过TFT3和电容Cdown提供的回路放电，进而使包含Cst-2的子像素单元的像素电压降低，造成两个子像素单元内的液晶分子的转动角度Φ不同来实现八畴显示，以改善大尺寸液晶显示器的视角和色偏问题。但在实际的使用中，以上述方式进行显示的液晶显示器会存在较明显的画面闪烁以及图像残留。
综上，亟需一种新的实现液晶显示器的八畴显示的方法来解决上述问题。
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新的实现液晶显示器的八畴显示的方法。
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，包括阵列基板，所述阵列基板上排布有多条扫描线、多条数据线与多个像素单元，其中，每个像素单元由共用同一条数据线且分别使用不同扫描线的第一子像素单元和第二子像素单元组成，第一子像素单元，其由第一扫描线上的扫描电压开启，并接收数据线的数据信号而具有第一像素电压；第二子像素单元，其在第一子像素单元的驱动期间内由第二扫描线上的扫描电压开启，并接收数据线的数据信号而具有第二像素电压；其中，第二子像素单元的驱动于第一子像素单元的驱动期间内完成。
优选地，第一子像素单元包括第一开关元件和第一存储电容，其中，所述第一开关元件包括控制端、信号输入端与信号输出端，所述控制端与所述第一扫描线电连接，所述信号输入端与所述数据线电连接，所述信号输出端与所述第一存储电容的一端电连接；所述第一存储电容的另一端与公共电极电连接。
优选地，第二子像素单元包括第二开关元件和第二存储电容，其中，所述第二开关元件包括控制端、信号输入端与信号输出端，所述控制端与所述第二扫描线电连接，所述信号输入端与所述数据线电连接，所述信号输出端与所述第二存储电容的一端电连接；所述第二存储电容的另一端与公共电极电连接。
优选地，开关元件包括薄膜晶体管。
优选地，第一子像素单元的面积小于所述第二子像素单元的面积。
本申请的实施例还提供了一种液晶显示面板的驱动方法，包括：步骤一、利用第一扫描线的扫描电压开启第一子像素单元，并利用数据线的数据信号对所述第一子像素单元充电，使其达到第一像素电压；步骤二、在第一子像素单元的驱动期间内利用第二扫描线的扫描电压开启第二子像素单元，并利用数据线的数据信号对所述第二子像素单元充电，使其达到第二像素电压；其中，所述第二子像素单元的驱动于所述第一子像素单元的驱动期间内完成。
优选地，根据第一子像素单元内的液晶分子的转动角度确定所述第一子像素单元的驱动期间；根据第二子像素单元内的液晶分子的转动角度确定所述第二子像素单元的驱动期间。
优选地，第二子像素单元的驱动期间为所述第一子像素单元的驱动期间的四分之三。
优选地，第一扫描线的扫描电压与所述第二扫描线的扫描电压的电压值相等。
优选地，根据一次耦合电压对公共电极的电位进行调整。
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：
通过采用具有共用同一条数据线且分别使用不同扫描线的两个子像素单元的像素单元结构，消除了交流驱动中二次耦合电压对液晶显示器的影响，增加了像素单元的开口率，有利于改善液晶显示器的显示效果。
本发明的其他优点、目标，和特征在某种程度上将在随后的说明书中进行阐述，并且在某种程度上，基于对下文的考察研究对本领域技术人员而言将是显而易见的，或者可以从本发明的实践中得到教导。本发明的目标和其他优点可以通过下面的说明书，权利要求书，以及附图中所特别指出的结构来实现和获得。
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为现有技术中实现八畴显示的液晶显示面板的像素单元的结构示意图；
图2为本申请实施例的液晶显示面板的像素单元的结构示意图；
图3为本申请实施例的液晶显示面板的驱动方法的流程示意图；
图4为本申请实施例的液晶显示面板的驱动时序示意图。
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。
通过对图1所示的像素单元的结构进行分析，可以发现导致液晶显示器画面闪烁及图像残留的原因主要是由于开关元件TFT3的寄生电容的影响，下面结合 图1进行详细说明。
图1中的像素单元被分成两个子像素单元，分别如图中两个矩形虚线框围成的区域所示。具体的，在子像素单元11内包含一个开关元件TFT1和一个存储电容Cst-1，另外，由两基板之间的液晶层等效出来的液晶电容Clc-1也标示于子像素单元11内。子像素单元12内包含一个开关元件TFT2和一个存储电容Cst-2，同样的，由两基板之间的液晶层等效出来的液晶电容Clc-2也标示于子像素单元12内。除此之外，在子像素单元12内还设置有一个开关元件TFT3以及一个共享电容Cdown。该像素单元实现八畴显示的具体过程为，首先由扫描线14驱动开关元件TFT1和TFT2打开，数据线13分别通过TFT1和TFT2对存储电容Cst-1和Cst-2同时充电，且将存储电容Cst-1和Cst-2充电到相同的电压值。由于此时施加于子像素单元11内的液晶像素的像素电压与施加于子像素单元12内的液晶像素的像素电压相等，因此，位于子像素单元11内的液晶分子与位于子像素单元12内的液晶分子具有相同的转动角度Φ。充电结束后，扫描线14回到低电平，关闭开关元件TFT1和TFT2。然后由共享扫描线15驱动子像素单元12内的开关元件TFT3打开，共享电容Cdown与存储电容Cst-2并联，同时存储电容Cst-2对共享电容Cdown进行充电，其自身电压降低。此时施加于子像素单元11内的液晶像素的像素电压将高于施加于子像素单元12内的液晶像素的像素电压，两个子像素单元内的液晶分子的转动角度Φ不再相同，实现液晶显示器的八畴显示。
进一步地，为了正确地显示画面，采用交流驱动方式的液晶显示器需要对寄生电容引起的耦合电压Vft进行一定的补偿。具体的，在图1中，当TFT1和TFT2打开时，扫描线14上的扫描电压会分别通过TFT1的寄生电容Cgd-1和TFT2的寄生电容Cgd-2对存储电容Cst-1和Cst-2的电压产生影响，记为一次耦合电压Vft-1的影响。当TFT1和TFT2关闭，TFT3打开时，共享扫描线15上的扫描电压将通过TFT3的寄生电容Cgd-3对存储电容Cst-2的电压产生影响，记为二次耦合电压Vft-2的影响。
现有技术中对于耦合电压的补偿方法都是针对两个子像素单元同步进行的，而二次耦合电压Vft-2只对存储电容Cst-2的电压有影响，只存在于子像素单元12内。因此，当子像素单元12中存在二次耦合电压时，子像素单元11与子像素单元12的针对耦合电压的补偿量将存在差异，进而导致交流驱动时正负电压所对应的同一灰阶电压存在差别，使液晶显示器在显示时出现画面闪烁。
为了解决上述问题，在本申请的实施例中提出了一种新的液晶显示面板，在 其阵列基板上排布有多条扫描线、多条数据线与多个像素单元，其中，每个像素单元的结构如图2所示，每个像素单元由共用同一条数据线且分别使用不同扫描线的第一子像素单元和第二子像素单元组成，其中，第一子像素单元由第一扫描线的扫描电压开启，并接收数据线的数据信号而具有第一像素电压。第二子像素单元在第一子像素单元的驱动期间内由第二扫描线的扫描电压开启，并接收数据线的数据信号而具有第二像素电压。
每个子像素单元各由一条扫描线驱动，每个像素单元的两个子像素单元由同一条数据线驱动。具体的，第一子像素单元21包括第一开关元件TFT1和第一存储电容Cst-1。其中，第一开关元件TFT1的控制端与第一扫描线24电连接，TFT1的信号输入端与数据线23电连接，TFT1的信号输出端与第一存储电容Cst-1的一端电连接，第一存储电容Cst-1的另一端与公共电极26电连接。第二子像素单元22包括第二开关元件TFT2和第二存储电容Cst-2。其中，第二开关元件TFT2的控制端与第二扫描线25电连接，TFT2的信号输入端与数据线23电连接，TFT2的信号输出端与第二存储电容Cst-2的一端电连接，第二存储电容Cst-2的另一端与公共电极26电连接。此外，两基板之间的液晶层等效出来的液晶电容Clc-1和Clc-2也分别于第一子像素单元21和第二子像素单元22内示出。液晶电容Clc-1和Clc-2的一端分别与TFT1和TFT2的信号输出端电连接，另一端与公共电极电连接。需要注意的是，公共电极26的走线在图2中未画出。存储电容Cst-1和Cst-2所连接的公共电极位于阵列基板上，液晶电容Clc-1和Clc-2所连接的公共电极位于另一基板上，两者具有相同的电位。
需要说明的是，上述像素单元中第一子像素单元的面积小于第二子像素单元的面积。举例而言，当第二子像素单元的面积大约为第一子像素单元的面积的二倍时，可以获得比较好的改善色偏的效果。
由于本申请实施例中省去了开关元件TFT3和共享电容Cdown以及它们所在的支路，因而不再存在寄生电容Cgd-3，即消除了二次耦合电压Vft-2的影响。
在本申请的实施例中，第一子像素单元的第一存储电容Cst-1、液晶电容Clc-1与第二子像素单元的第二存储电容Cst-2、液晶电容Clc-2的一个极板均与公共电极相连接，使得产生的耦合电压之间不会相互叠加，这种结构有利于降低寄生电容的交叉影响。在后面还将看到，本申请实施例的像素单元的结构更便于对一次耦合电压Vft-1进行补偿。
进一步地，像素单元的结构的改进使得制作阵列基板的工艺步骤得到简化， 在提升基板生产效率的同时还进一步提高了基板的可靠性。像素单元的结构的改进增加了第二子像素单元的开口率，有利于改善液晶显示器的显示效果。
基于图2所示的像素单元的结构，本申请实施例还提出了一种液晶显示面板的驱动方法，下面结合图3和图4进行说明。
图3为本申请实施例的液晶显示面板的驱动方法的流程示意图，图4为本申请实施例的液晶显示面板的驱动时序示意图。如图3所示，本申请实施例的驱动方法包括：步骤S310、利用第一扫描线的扫描电压开启第一子像素单元，并利用数据线的数据信号对所述第一子像素单元充电，使其达到第一像素电压；步骤S320、在第一子像素单元的驱动期间内利用第二扫描线的扫描电压开启第二子像素单元，并利用数据线的数据信号对所述第二子像素单元充电，使其达到第二像素电压。
其中，第二子像素单元的驱动于第一子像素单元的驱动期间内完成。
由电荷守恒可知，当对电容进行充电的电压或电流恒定时，其所获得的电量由充电时间决定。本申请实施例的驱动方法通过调整第一存储电容Cst-1和第二存储电容Cst-2的充电时间来得到不同的像素电压。进一步地，第一子像素单元的驱动期间根据第一子像素单元内部的液晶分子的转动角度Φ1确定，第二子像素单元的驱动期间根据第二子像素单元内部的液晶分子的转动角度Φ2确定。
如图4所示，在有效寻址周期T内完成对第一子像素单元与第二子像素单元的存储电容的充电。有效寻址周期指的是根据液晶显示器的像素和每帧画面的刷新频率确定的每个像素单元所允许的开启时间。举例而言，当液晶显示器的分辨率为1024*768时，其每行像素单元允许的开启时间为21.7μs，即有效寻址周期为21.7μs。具体的，在t0时刻，对第一扫描线24施加扫描电压，该扫描电压将第一子像素单元内的第一开关元件TFT1打开，同时数据线23上的信号电压对第一存储电容Cst-1进行充电。进一步地，在保持第一扫描线24对第一子像素单元进行驱动的同时，例如t1时刻，对第二扫描线25施加扫描电压，该扫描电压将第二子像素单元内的第二开关元件TFT2打开，同时数据线23上的信号电压对第二存储电容Cst-2进行充电。第一扫描线24和第二扫描线25的扫描电压的电压值相等，并同时在t2时刻回到低电平，结束对存储电容Cst-1和Cst-2的充电。
需要说明的是，在本申请的实施例中，对第二存储电容Cst-2开始充电的时刻不做限定。只需保证对第二子像素单元的驱动在第一子像素单元的驱动期间内完成即可。进一步地，步骤S310与步骤S320可同时进行。例如在图4中，也可以 在t0时刻通过第一扫描线24与第二扫描线25同时施加驱动电压来打开TFT1和TFT2，并且使TFT2在(t0+b)时刻先于TFT1关闭。或者由第二扫描线25在t0时刻与t1时刻之间的某一时刻打开TFT2并先于TFT1关闭。
在本申请的实施例中，第一子像素单元的驱动期间大于第二子像素单元的驱动期间。举例而言，使第二子像素单元的驱动期间b为第一子像素单元的驱动期间a的四分之三，这时第一子像素单元的单位面积的照度高于第二子像素单元的单位面积的照度，可以获得比较好的显示效果。
本申请实施例的驱动方法可用于驱动高解析度的液晶显示面板。现有技术中，需要在完成对第一存储电容Cst-1与第二存储电容Cst-2的充电之后再开启TFT3使第二存储电容Cst-2放电。根据前面的分析可知，由于一个像素单元的驱动需要在一个有效寻址周期内完成，所以TFT1和TFT2的充电时间受到限制。而在本申请的实施例中，第二子像素单元的驱动过程在第一子像素单元的的驱动期间内完成，不与第一子像素单元各自占用有效寻址周期。进一步地，当第一子像素单元的驱动过程(包含第二子像素单元的驱动过程)不需要占用全部的有效寻址周期时，则可以使用当前的驱动模组驱动更多的像素单元，提高液晶显示器的解析度。
本申请实施例的驱动方法还包括根据一次耦合电压Vft-1对公共电极的电位进行调整的步骤。根据前面的分析可知，本申请实施例的第一子像素单元的存储电容Cst-1、液晶电容Clc-1与第二子像素单元的存储电容Cst-2、液晶电容Clc-2的一个极板均与公共电极相连接，这种结构可以很方便地通过调整公共电极的电位Vcom来补偿一次耦合电压的影响。进一步地，在本申请的实施例中，可以通过采用调整公共电极的电位Vcom的方式来补偿交流驱动中不对称的正负帧画面，因此无需对像素单元采用复杂的多阶驱动方式，只采用二阶驱动的方式对像素单元进行驱动就可以达到满意的显示效果。另外，由于扫描线上只存在两种不同的电压值(打开晶体管的电压与关闭晶体管的电压)，且第一扫描线24和第二扫描线25的两种电压数值对应相等，因此分别产生于第一子像素单元与第二子像素单元处的一次耦合电压也大致相等，进一步降低了第一子像素单元与第二子像素单元的Vcom补偿量的差异，有利于改善液晶显示器的显示效果。
最后需要说明的是，尽管在本申请实施例的驱动方法中利用两条扫描线驱动一个像素单元，但由于第二子像素单元的驱动过程在第一子像素单元的驱动期间内完成，所以在设计扫描线驱动模组时，只需将现有技术中的单扫描线驱动的 Gate IC稍作修改，使其在现有输出波形的基础上再周期性地输出一种不同宽度的波形即可，而不需要考虑复杂的时序设计，有利于缩短新产品的开发时间。
虽然本发明所揭露的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所揭露的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的专利保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (11)

  1. 一种液晶显示面板，包括阵列基板，所述阵列基板上排布有多条扫描线、多条数据线与多个像素单元，其中，
    每个像素单元由共用同一条数据线且分别使用不同扫描线的第一子像素单元和第二子像素单元组成，
    第一子像素单元，其由第一扫描线的扫描电压开启，并接收数据线的数据信号而具有第一像素电压；
    第二子像素单元，其在第一子像素单元的驱动期间内由第二扫描线的扫描电压开启，并接收数据线的数据信号而具有第二像素电压；
    其中，所述第二子像素单元的驱动于所述第一子像素单元的驱动期间内完成。
  2. 根据权利要求1所述的液晶显示面板，其中，所述第一子像素单元包括第一开关元件和第一存储电容，其中，
    所述第一开关元件包括控制端、信号输入端与信号输出端，所述控制端与所述第一扫描线电连接，所述信号输入端与所述数据线电连接，所述信号输出端与所述第一存储电容的一端电连接；
    所述第一存储电容的另一端与公共电极电连接。
  3. 根据权利要求2所述的液晶显示面板，其中，所述第二子像素单元包括第二开关元件和第二存储电容，其中，
    所述第二开关元件包括控制端、信号输入端与信号输出端，所述控制端与所述第二扫描线电连接，所述信号输入端与所述数据线电连接，所述信号输出端与所述第二存储电容的一端电连接；
    所述第二存储电容的另一端与公共电极电连接。
  4. 根据权利要求2所述的液晶显示面板，其中，所述开关元件包括薄膜晶体管。
  5. 根据权利要求3所述的液晶显示面板，其中，所述开关元件包括薄膜晶体管。
  6. 根据权利要求1所述的液晶显示面板，其中，所述第一子像素单元的面积小于所述第二子像素单元的面积。
  7. 一种液晶显示面板的驱动方法，所述液晶显示面板包括阵列基板，所述阵列基板上排布有多条扫描线、多条数据线与多个像素单元，其中，
    每个像素单元由共用同一条数据线且分别使用不同扫描线的第一子像素单元和第二子像素单元组成，
    第一子像素单元，其由第一扫描线的扫描电压开启，并接收数据线的数据信号而具有第一像素电压；
    第二子像素单元，其在第一子像素单元的驱动期间内由第二扫描线的扫描电压开启，并接收数据线的数据信号而具有第二像素电压；
    其中，所述第二子像素单元的驱动于所述第一子像素单元的驱动期间内完成；
    该驱动方法包括：
    步骤一、利用第一扫描线的扫描电压开启第一子像素单元，并利用数据线的数据信号对所述第一子像素单元充电，使其达到第一像素电压；
    步骤二、在第一子像素单元的驱动期间内利用第二扫描线的扫描电压开启第二子像素单元，并利用数据线的数据信号对所述第二子像素单元充电，使其达到第二像素电压；
    其中，所述第二子像素单元的驱动于所述第一子像素单元的驱动期间内完成。
  8. 根据权利要求7所述的方法，其中，根据第一子像素单元内的液晶分子的转动角度确定所述第一子像素单元的驱动期间；根据第二子像素单元内的液晶分子的转动角度确定所述第二子像素单元的驱动期间。
  9. 根据权利要求8所述的方法，其中，所述第二子像素单元的驱动期间为所述第一子像素单元的驱动期间的四分之三。
  10. 根据权利要求7所述的方法，其中，所述第一扫描线的扫描电压与所述第二扫描线的扫描电压的电压值相等。
  11. 根据权利要求7所述的方法，其中，在步骤一之前还包括：
    根据一次耦合电压对公共电极的电位进行调整。
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