WO2017124596A1 - 液晶显示面板及液晶显示装置 - Google Patents

液晶显示面板及液晶显示装置 Download PDF

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Publication number
WO2017124596A1
WO2017124596A1 PCT/CN2016/074222 CN2016074222W WO2017124596A1 WO 2017124596 A1 WO2017124596 A1 WO 2017124596A1 CN 2016074222 W CN2016074222 W CN 2016074222W WO 2017124596 A1 WO2017124596 A1 WO 2017124596A1
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WIPO (PCT)
Prior art keywords
pixel electrode
liquid crystal
electrode
crystal display
common electrode
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PCT/CN2016/074222
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English (en)
French (fr)
Inventor
郝思坤
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深圳市华星光电技术有限公司
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Priority to US14/915,271 priority Critical patent/US9971208B2/en
Publication of WO2017124596A1 publication Critical patent/WO2017124596A1/zh

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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
    • G02F1/136213—Storage capacitors associated with the pixel electrode
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133345—Insulating layers
    • 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
    • G02F1/136227—Through-hole connection of the pixel electrode to the active element through an insulation layer
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134318—Electrodes characterised by their geometrical arrangement having a patterned common electrode
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a liquid crystal display panel and a liquid crystal display device.
  • Liquid crystal display is currently the most widely used flat panel display. With the development of liquid crystal display technology, people have put forward higher requirements on the display quality, design, low cost and high transmittance of liquid crystal display.
  • liquid crystal displays generally include two types, one is composed of upper and lower substrates and an intermediate liquid crystal layer, and the substrate is composed of glass and electrodes, such as TN (Twist). Nematic; twisted nematic mode, VA (Vertical Alignment) mode, and MVA (Multidomain) developed to solve narrow viewing angles Vertical Alignment mode.
  • TN Transmission
  • VA Vertical Alignment
  • MVA Multidomain
  • the electrodes are located only on one side of the substrate, forming a display of a transverse electric field mode, such as IPS (In-plane). Switching; plane direction conversion) mode, FFS (Fringe Field Switching) mode, etc.
  • the FFS mode is a wide viewing angle technology derived from the IPS mode.
  • the structure of the FFS is to set a general electrode under the electrode spacing. When a voltage is applied, a boundary electric field is generated to rotate the liquid crystal on the electrode, and the boundary electric field is arranged to be nearly homogeneous.
  • the liquid crystal molecules rotate inside the surface of the electrode to achieve high penetration and large viewing angle characteristics.
  • FIG. 1 is a pixel structure diagram of a liquid crystal display panel in the prior art
  • FIG. 2 is a cross-sectional view of the pixel structure in FIG. 1 taken along a line AA', as shown in FIG. 1 and FIG.
  • the pixel electrode 15 in the FFS liquid crystal display panel 1 of the present technology completely overlaps the common electrode 14, and the passivation (PV) layer 13 between the pixel electrode 15 and the common electrode 14 is thin, so that the pixel electrode 15 and the common A large storage capacitor is formed between the electrodes 14.
  • An excessive storage capacitor will cause insufficient charging of the liquid crystal display panel, and the load of the resistor and capacitor is too heavy, and the charging time of the pixel is too long.
  • the present invention provides a liquid crystal display panel and a display device capable of reducing the storage capacitance of a pixel, improving the charging capability of the pixel, and reducing the driving voltage of the liquid crystal display panel, thereby reducing the power consumption of the liquid crystal display panel.
  • a first aspect of the present invention provides a liquid crystal display panel including: a common electrode, a first pixel electrode, a second pixel electrode, and a passivation layer, wherein the first pixel electrode and the second pixel electrode are spaced apart, and the first pixel electrode is The common electrode and the second pixel electrode partially overlap the common electrode, the overlapping portion of the common electrode and the first pixel electrode, and the overlapping portion of the common electrode and the second pixel electrode are hollow structures, and the area of the hollow structure is smaller than the area of the first pixel electrode or The area of the second pixel electrode; the passivation layer is disposed between the common electrode and the first pixel electrode and the second pixel electrode, and the passivation layer corresponds to the non-overlapping of the common electrode and the first pixel electrode and the common electrode and the second pixel electrode The area is provided with a groove.
  • the liquid crystal display panel further includes a substrate, a gate insulating layer, a signal line, and a PFA organic film layer, wherein
  • a gate insulating layer is disposed above the substrate
  • the signal line spacing is disposed above the gate insulating layer
  • a PFA organic film layer covers the signal line and extends onto the gate insulating layer
  • the common electrode is disposed above the PFA organic film layer
  • the passivation layer covers the common electrode
  • the first pixel electrode and the second pixel electrode are spaced apart above the passivation layer.
  • a second aspect of the present invention provides a liquid crystal display panel including: a common electrode, a first pixel electrode, and a second pixel electrode, wherein the first pixel electrode and the second pixel electrode are spaced apart, and the first pixel electrode and the common electrode and the first electrode The two-pixel electrode partially overlaps the common electrode, and the overlapping portion of the common electrode and the first pixel electrode and the overlapping portion of the common electrode and the second pixel electrode are hollow structures.
  • the liquid crystal display panel further includes a passivation layer disposed between the common electrode and the first pixel electrode and the second pixel electrode.
  • the passivation layer is provided with a recess corresponding to the non-overlapping region of the common electrode and the first pixel electrode and the common electrode and the second pixel electrode.
  • the area of the hollow structure is smaller than the area of the first pixel electrode or the area of the second pixel electrode.
  • the liquid crystal display panel further includes a substrate, a gate insulating layer, a signal line, and a PFA organic film layer, wherein
  • a gate insulating layer is disposed above the substrate
  • the signal line spacing is disposed above the gate insulating layer
  • a PFA organic film layer covers the signal line and extends onto the gate insulating layer
  • the common electrode is disposed above the PFA organic film layer
  • the passivation layer covers the common electrode
  • the first pixel electrode and the second pixel electrode are spaced apart above the passivation layer.
  • a third aspect of the present invention provides a liquid crystal display device including a liquid crystal display panel including a common electrode, a first pixel electrode, and a second pixel electrode, wherein the first pixel electrode and the second pixel electrode The first pixel electrode and the common electrode and the second pixel electrode overlap the common electrode portion, and the overlapping portion of the common electrode and the first pixel electrode and the overlapping portion of the common electrode and the second pixel electrode are hollow structures.
  • the liquid crystal display panel further includes a passivation layer disposed between the common electrode and the first pixel electrode and the second pixel electrode.
  • the passivation layer is provided with a recess corresponding to the non-overlapping region of the common electrode and the first pixel electrode and the common electrode and the second pixel electrode.
  • the area of the hollow structure is smaller than the area of the first pixel electrode or the area of the second pixel electrode.
  • the liquid crystal display panel further includes a substrate, a gate insulating layer, a signal line, and a PFA organic film layer, wherein
  • a gate insulating layer is disposed above the substrate
  • the signal line spacing is disposed above the gate insulating layer
  • a PFA organic film layer covers the signal line and extends onto the gate insulating layer
  • the common electrode is disposed above the PFA organic film layer
  • the passivation layer covers the common electrode
  • the first pixel electrode and the second pixel electrode are spaced apart above the passivation layer.
  • the present invention has the beneficial effects that the liquid crystal display panel and the liquid crystal display device of the present invention are configured to reduce the liquid crystal display panel by disposing the overlapping portion of the common electrode and the pixel electrode as a hollow structure.
  • the charging time of the pixel can be further reduced, the driving voltage is lowered, and the power consumption of the liquid crystal display panel is reduced.
  • FIG. 1 is a view showing a pixel structure of a liquid crystal display panel of the prior art
  • Figure 2 is a cross-sectional view of the pixel structure of Figure 1 taken along line A-A';
  • FIG. 3 is a schematic view showing a pixel structure of a liquid crystal display panel according to an embodiment of the present invention.
  • 4a to 4f are schematic views showing the formation of the pixel structure shown in FIG. 3;
  • Figure 5 is a cross-sectional view of the first embodiment of the pixel structure shown in Figure 3 taken along line B-B';
  • Figure 6 is a cross-sectional view showing a second embodiment of the pixel structure shown in Figure 3 taken along line B-B'.
  • the liquid crystal display panel includes a color filter substrate disposed at a relatively interval (Color Filter Substrate, referred to as CF substrate, also known as color filter substrate) and array substrate (Thin Film Transistor) Substrate, referred to as a TFT substrate, also referred to as a thin film transistor substrate or an Array substrate, and a liquid crystal (liquid crystal molecule) filled between the two substrates, the liquid crystal is located in a liquid crystal cell formed by stacking the array substrate and the color filter substrate.
  • CF substrate Color Filter Substrate
  • TFT substrate Thin Film Transistor
  • the TFT array substrate generally includes a glass substrate, a common electrode, a gate, a gate insulating layer, an amorphous silicon layer, an active semiconductor layer, a source electrode, a drain electrode, a passivation layer, and a pixel electrode.
  • the TFT array substrate may further cover a PFA organic film layer over the gate insulating layer, and the PFA organic film layer is used to reduce the parasitic capacitance of the liquid crystal display panel, wherein the PFA organic film is a polymer film, and the acrylic resin may be used. Made of epoxy resin and polyvinyl alcohol, the PFA organic film also has insulation.
  • FIG. 3 is a schematic diagram of a pixel structure of a liquid crystal display panel according to an embodiment of the invention.
  • the liquid crystal display panel 2 of the present embodiment includes a substrate (not shown in FIG. 3), a plurality of signal lines D disposed along the column direction on the substrate, and a plurality of scanning lines disposed along the row direction on the substrate. G, a plurality of scanning lines G and a plurality of signal lines D are alternately arranged vertically.
  • the plurality of scanning lines G and the plurality of signal lines D alternately form a plurality of pixel units, each of the pixel units includes a plurality of pixel electrodes 25 and a common electrode 24, and the common electrode 24 is spaced apart from the pixel electrodes 25 to form a storage capacitor.
  • the liquid crystal display panel 2 further includes a thin film transistor. A gate (not shown) of the thin film transistor is disposed on the scanning line G, a source 26 of the thin film transistor is connected to the signal line D, and a drain 27 of the thin film transistor is connected to the pixel electrode 25.
  • the scan line G supplies the scan signal
  • the thin film transistor is turned on, and the pixel electrode 25 is connected to the signal line D through the thin film transistor to acquire the data signal supplied from the signal line D.
  • FIG. 4a to FIG. 4f are schematic diagrams showing the formation of the pixel structure of the liquid crystal display panel 2 shown in FIG.
  • the forming process of the pixel structure of this embodiment specifically includes:
  • a scanning line G is provided on a substrate (not shown) as shown in Fig. 4a. Further, a gate of the thin film transistor is further disposed on the scan line G and a gate insulating layer is disposed on the gate, and the gate insulating layer covers the gate and extends onto the substrate (the structure of the gate and the gate insulating layer is not shown in FIG. 4a).
  • an amorphous silicon layer 21 is disposed on the gate of the thin film transistor (Amorphous) Si), the amorphous silicon layer 21 is disposed over the gate of the thin film transistor, as shown in FIG. 4b.
  • a signal line D and a source 26 and a drain 27 of the thin film transistor are disposed on the amorphous silicon layer 21, wherein the signal line D is alternately arranged perpendicularly to the scanning line G, and the source 26 and the drain 27 of the thin film transistor are disposed on the amorphous silicon Above, the source 26 of the thin film transistor is connected to the signal line D as shown in Fig. 4c.
  • a PFA organic film layer 22 is provided on the signal line D and the source 26 and the drain 27 of the thin film transistor, as shown in Fig. 4d.
  • the PFA organic film layer 22 covers the signal line D, the source electrode 26, the drain electrode 27, and the gate insulating layer, and the PFA organic film layer 22 is further provided with a through hole (not shown).
  • a common electrode 24 is disposed on the PFA organic film layer 22, wherein the common electrode 24 has a hollowed-out 28 structure, and the hollowed-out 28 regions are spaced apart from the common electrode 24 as shown in Fig. 4e.
  • a passivation layer 23 is disposed over the common electrode 24, as shown in FIG. 4f, wherein the passivation layer 23 covers the common electrode 24 and extends onto the PFA organic film layer 22, and a via hole is also disposed above the passivation layer 23 ( The figure is not shown).
  • a plurality of pixel electrodes 25 are provided above the passivation layer 23, and a diagram in which the pixel electrodes 25 are provided is shown in FIG.
  • FIG. 5 is a cross-sectional view of the first embodiment of the pixel structure shown in FIG. 3 taken along line B-B'.
  • the pixel structure of the present embodiment can be seen along the tangential line of BB'.
  • the pixel structure of the liquid crystal display panel of the present embodiment includes the substrate 100, the gate insulating layer 101, the signal line D, and the PFA organic film layer 22.
  • the gate insulating layer 101 is located above the substrate 100, the signal lines D are disposed above the gate insulating layer 101, the PFA organic film layer 22 covers the signal line D and extends to the gate insulating layer 101, and the common electrode 24 is disposed on the PFA organic film layer. 22, and the common electrode 24 has a hollowed-out 28 structure, the passivation layer 23 covers the common electrode 24 and extends to the PFA organic film layer 22, the pixel electrode 25 is spaced apart from the passivation layer 23, and the pixel electrode 25 is The common electrode 24 partially overlaps, and the overlapping portion of the common electrode 24 with the pixel electrode 25 is a hollow 28 structure, and the area of the hollow 28 structure is smaller than the area of the pixel electrode 25.
  • the liquid crystal display panel 2 includes a common electrode 24, a first pixel electrode 251, and a second pixel electrode 252.
  • the first pixel electrode 251 and the second pixel electrode 252 are spaced apart from each other, and the first pixel electrode 251 and the common electrode 24 and the second pixel electrode 252 and the common electrode 24 are partially overlapped, and the common electrode 24 corresponds to the first pixel.
  • the overlapping portion of the electrode 251 and the common electrode 24 correspond to the overlapping portion with the second pixel electrode 252, and the area of the hollowed out 28 region is smaller than the area of the first pixel electrode 25 or smaller than the area of the second pixel electrode 25.
  • the hollow 28 region of the common electrode 24 corresponds to a partial position region of the first pixel electrode 251 and a partial position region corresponding to the second pixel electrode 252.
  • the first pixel electrode 251 and the second pixel electrode 252 are connected to the drain electrode 27 through via holes provided in the PFA organic film layer 22 and the passivation layer 23 .
  • FIG. 6 is a cross-sectional view showing the second embodiment of the pixel structure shown in FIG. 3 taken along line B-B'.
  • the passivation layer 23 is formed with a recess corresponding to the non-overlapping region of the common electrode 24 and the pixel electrode 25, which is further processed by the dry etching process on the passivation layer 23.
  • the passivation layer 23 is formed into a structure having a groove. That is, the passivation layer 23 is provided with a groove corresponding to the non-overlapping region of the common electrode 24 and the first pixel electrode 251 and the common electrode 24 and the second pixel electrode 252.
  • the passivation layer 23 is formed with a groove structure corresponding to the non-overlapping regions of the common electrode 24 and the pixel electrode 25, so that the liquid crystal display panel can improve the transmittance of the display area.
  • the present invention also provides a liquid crystal display device including the liquid crystal display panel 2 and a backlight module and other components that provide a light source for the liquid crystal display panel.
  • the liquid crystal display panel and the liquid crystal display device of the present invention reduce the overlap area between the common electrode and the pixel electrode by providing a hollow structure on the common electrode of the array substrate.
  • the purpose of reducing the storage capacitance between the common electrode and the pixel electrode is achieved, thereby reducing the driving voltage of the liquid crystal display panel, reducing the charging time of the pixel, and reducing the power consumption of the liquid crystal display panel.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Power Engineering (AREA)
  • Thin Film Transistor (AREA)

Abstract

一种液晶显示面板及其显示装置。液晶显示面板通过使像素电极（25）与公共电极（24）部分重叠，且公共电极（24）中与像素电极（25）的重叠部分为镂空结构，从而减小像素电极（25）与公共电极（24）之间的交叠面积，进而减小像素电极（25）与公共电极之间（24）的存储电容，减小像素的充电时间，降低驱动电压，并降低液晶显示面板的功耗。

Description

液晶显示面板及液晶显示装置
【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液晶显示装置。
【背景技术】
液晶显示器是目前使用最广泛的一种平板显示器，随着液晶显示器技术的发展进步，人们对液晶显示器的显示品质、外观设计、低成本和高穿透率等提出了更高的要求。
目前普遍采用的液晶显示器通常包括两种，一种是由上下衬底和中间液晶层组成，衬底由玻璃和电极等组成，如TN（Twist Nematic；扭转向列型）模式，VA（Vertical Alignment；垂直对齐）模式，以及为了解决视角过窄开发的MVA（Multidomain Vertical Alignment；多区域垂直排列）模式。另一种是电极只位于衬底的一侧，形成横向电场模式的显示器，如IPS（In-plane switching；平面方向转换）模式、FFS（Fringe Field Switching；边缘场开关）模式等。
其中，FFS模式是IPS模式衍生出来的广视角技术，FFS的结构是在电极间距下方设置一般电极，施加电压就会产生边界电场使液晶在电极上旋转，藉由边界电场使几乎均质排列的液晶分子在电极表层内部旋转，达到高穿透性与大视角特性。请参看图1和图2，图1为现有技术中的液晶显示面板的像素结构图，图2是图1中的像素结构沿A-A′切线的剖面图，如图1和图2所示，现在技术的FFS液晶显示面板1中的像素电极15与公共电极14完全重叠，位于像素电极15和公共电极14之间的钝化（Passivation；简称PV）层13很薄，使得像素电极15和公共电极14之间形成很大的存储电容，过大的存储电容将造成液晶显示面板充电不足，电阻电容负载过重，像素充电时间过长。
【发明内容】
有鉴于此，本发明提供一种液晶显示面板及显示装置，能够减小像素的存储电容，提升像素的充电能力，并且降低液晶显示面板的驱动电压，从而降低液晶显示面板的功耗。
本发明的第一方面提供一种液晶显示面板，包括：公共电极、第一像素电极、第二像素电极及钝化层，第一像素电极及第二像素电极间隔排列，且第一像素电极与公共电极及第二像素电极与公共电极部分重叠，公共电极与第一像素电极的重叠部分及公共电极与第二像素电极的重叠部分为镂空结构，镂空结构的面积小于第一像素电极的面积或第二像素电极的面积；钝化层设置于公共电极与第一像素电极及第二像素电极之间，钝化层对应于公共电极与第一像素电极及公共电极与第二像素电极的非重叠区域设置有凹槽。
其中，液晶显示面板还包括基板、栅绝缘层、信号线及PFA有机膜层，其中，
栅绝缘层设置于基板上方；
信号线间隔设置于栅绝缘层上方；
PFA有机膜层覆盖信号线并延伸到栅绝缘层上；
公共电极设置于PFA有机膜层上方；
钝化层覆盖公共电极；
第一像素电极及第二像素电极间隔设置于钝化层上方。
本发明的第二方面提供一种液晶显示面板，包括：公共电极、第一像素电极及第二像素电极，第一像素电极及第二像素电极间隔排列，且第一像素电极与公共电极及第二像素电极与公共电极部分重叠，公共电极与第一像素电极的重叠部分及公共电极与第二像素电极的重叠部分为镂空结构。
其中，液晶显示面板还包括钝化层，钝化层设置于公共电极与第一像素电极及第二像素电极之间。
其中，钝化层对应于公共电极与第一像素电极及公共电极与第二像素电极的非重叠区域设置有凹槽。
其中，镂空结构的面积小于第一像素电极的面积或第二像素电极的面积。
其中，液晶显示面板还包括基板、栅绝缘层、信号线及PFA有机膜层，其中，
栅绝缘层设置于基板上方；
信号线间隔设置于栅绝缘层上方；
PFA有机膜层覆盖信号线并延伸到栅绝缘层上；
公共电极设置于PFA有机膜层上方；
钝化层覆盖公共电极；
第一像素电极及第二像素电极间隔设置于钝化层上方。
本发明的第三方面提供一种液晶显示装置，该液晶显示装置包括液晶显示面板，液晶显示面板包括公共电极、第一像素电极及第二像素电极，其中，第一像素电极及第二像素电极间隔排列，且第一像素电极与公共电极及第二像素电极与公共电极部分重叠，公共电极与第一像素电极的重叠部分及公共电极与第二像素电极的重叠部分为镂空结构。
其中，液晶显示面板还包括钝化层，钝化层设置于公共电极与第一像素电极及第二像素电极之间。
其中，钝化层对应于公共电极与第一像素电极及公共电极与第二像素电极的非重叠区域设置有凹槽。
其中，镂空结构的面积小于第一像素电极的面积或第二像素电极的面积。
其中，液晶显示面板还包括基板、栅绝缘层、信号线及PFA有机膜层，其中，
栅绝缘层设置于基板上方；
信号线间隔设置于栅绝缘层上方；
PFA有机膜层覆盖信号线并延伸到栅绝缘层上；
公共电极设置于PFA有机膜层上方；
钝化层覆盖公共电极；
第一像素电极及第二像素电极间隔设置于钝化层上方。
通过上述方案，本发明的有益效果是：区别于现有技术，本发明的液晶显示面板及液晶显示装置，通过将公共电极与像素电极的重叠部分设置为镂空结构以实现减小液晶显示面板的像素电极与公共电极之间的交叠面积的目的，进而减小像素电极与公共电极之间的存储电容的电容值，从而可以弥补现有技术因存储电容电容值过大造成的充电不足，进而可进一步减小像素的充电时间，降低驱动电压，降低液晶显示面板的功耗。
【附图说明】
图1是现有技术的液晶显示面板的像素结构图；
图2是图1中的像素结构沿A-A′切线的剖面图；
图3是本发明一实施例的液晶显示面板的像素结构的示意图；
图4a至图4f是图3所示的像素结构的形成示意图；
图5是图3所示的像素结构沿B-B′切线的第一实施例的剖面图；
图6是图3所示的像素结构沿B-B′切线的第二实施例的剖面图。
【具体实施方式】
为了使本发明所要解决的技术问题、技术方案及有益效果更加清楚、明白，以下结合附图和实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
液晶显示面板包括相对间隔设置的彩膜基板（Color Filter Substrate，简称CF基板，又称彩色滤光片基板）和阵列基板（Thin Film Transistor Substrate，简称TFT基板，又称薄膜晶体管基板或Array基板）以及填充于两基板之间的液晶（液晶分子），液晶位于阵列基板和彩膜基板叠加形成的液晶盒内。其中，TFT阵列基板通常包括玻璃基板、公共电极、栅极、栅绝缘层、非晶硅层、有源半导体层、源电极、漏电极、钝化层及像素电极。此外，TFT阵列基板还可以在栅绝缘层上方覆盖设置PFA有机膜层，PFA有机膜层用于减小液晶显示面板的寄生电容，其中，PFA有机膜为一种聚合物膜，可以采用丙烯酸树脂、环氧树脂和聚乙烯醇等化合物制成，PFA有机膜层同样具有绝缘作用。
请参见图3，图3是本发明一实施例的液晶显示面板的像素结构示意图。如图3所示，本实施例所揭示液晶显示面板2包括基板（图3未示）、在基板上沿列方向设置的多条信号线D及在基板上沿行方向设置的多条扫描线G，多条扫描线G和多条信号线D垂直交替设置。其中，多条扫描线G和多条信号线D交替形成多个像素单元，每个像素单元包括多个像素电极25以及公共电极24，公共电极24与像素电极25间隔设置，以形成存储电容。液晶显示面板2进一步包括薄膜晶体管，薄膜晶体管的栅极（图未示）设置在扫描线G上，薄膜晶体管的源极26与信号线D连接，薄膜晶体管的漏极27与像素电极25连接。当扫描线G提供扫描信号时，薄膜晶体管导通，像素电极25通过薄膜晶体管与信号线D连接，以获取信号线D所提供的数据信号。
请进一步参见图4a至图4f，图4a至图4f是图3所示的液晶显示面板2的像素结构的形成示意图。本实施例的像素结构的形成过程具体包括：
在基板（图未示）上设置扫描线G，如图4a所示。并且进一步在扫描线G上设置薄膜晶体管的栅极及在栅极上设置栅绝缘层，栅绝缘层覆盖栅极并延伸到基板上（图4a中未标示栅极及栅绝缘层的结构）。
进一步在薄膜晶体管的栅极上设置非晶硅层21（Amorphous Si），非晶硅层21覆盖设置于薄膜晶体管的栅极上方，如图4b所示。
在非晶硅层21上设置信号线D以及薄膜晶体管的源极26和漏极27，其中信号线D与扫描线G垂直交替设置，薄膜晶体管的源极26和漏极27设置在非晶硅的上方，其中薄膜晶体管的源极26与信号线D连接，如图4c所示。
在信号线D以及薄膜晶体管的源极26和漏极27上设置PFA有机膜层22，如图4d所示。其中，PFA有机膜层22覆盖信号线D、源极26、漏极27及栅绝缘层，并且，PFA有机膜层22上还设置有通孔（图未示）。
进一步在PFA有机膜层22上设置公共电极24，其中，公共电极24具有镂空28结构，镂空28区域间隔设置于公共电极24上，如图4e所示。
进一步在公共电极24上方设置钝化层23，如图4f所示，其中，钝化层23覆盖公共电极24并延伸到PFA有机膜层22上，并且钝化层23上方也设置有通孔（图未示）。
进一步在钝化层23上方设置多个像素电极25，设置像素电极25后的图如图3所示。
请进一步参看图5，图5是图3所示的像素结构沿B-B′切线的第一实施例的剖面图。如图5所示，本实施例的像素结构沿B-B′切线切开可以看到，本实施例的液晶显示面板的像素结构包括基板100、栅绝缘层101、信号线D、PFA有机膜层22、公共电极24、钝化层23及像素电极25。其中，栅绝缘层101位于基板100上方，信号线D间隔设置于栅绝缘层101上方，PFA有机膜层22覆盖信号线D并延伸到栅绝缘层101上，公共电极24设置于PFA有机膜层22上，且公共电极24具有间隔设置的镂空28结构，钝化层23覆盖公共电极24并延伸到PFA有机膜层22，像素电极25间隔设置于钝化层23上，并且，像素电极25与公共电极24部分重叠，公共电极24对应与像素电极25的重叠部分为镂空28结构，且镂空28结构的面积小于像素电极25的面积。
这里以第一像素电极251及第二像素电极252为例说明。液晶显示面板2包括公共电极24、第一像素电极251及第二像素电极252。其中，第一像素电极251及第二像素电极252间隔排列，并且，第一像素电极251与公共电极24及第二像素电极252与公共电极24均部分重叠，公共电极24对应于与第一像素电极251的重叠部分和公共电极24对应于与第二像素电极252的重叠部分均为镂空28结构，并且镂空28区域的面积小于第一像素电极25的面积或小于第二像素电极25的面积，即公共电极24的镂空28区域对应第一像素电极251的部分位置区域和对应第二像素电极252的部分位置区域。其中，第一像素电极251及第二像素电极252通过PFA有机膜层22及钝化层23上设置的通孔与漏电极27连接。
请参看图6，图6是图3所示的像素结构沿B-B′切线的第二实施例的剖面图。其中，本实施例与上述实施例的区别在于，钝化层23对应于公共电极24与像素电极25的非重叠区域形成有凹槽，这是通过对钝化层23进一步进行干刻工艺以使钝化层23形成具有凹槽的结构。即钝化层23对应于公共电极24与第一像素电极251及公共电极24与第二像素电极252的非重叠区域设置有凹槽。通过对钝化层23进行干刻工艺使得钝化层23对应于公共电极24与像素电极25的非重叠区域形成有凹槽结构，从而使得液晶显示面板可以提升显示面积的穿透率。
本发明还提供一种液晶显示装置，该液晶显示装置包括上述液晶显示面板2及为上述液晶显示面板提供光源的背光模组及其他元器件。
综上所述，区域别于现有技术，本发明的液晶显示面板及液晶显示装置，通过在阵列基板的公共电极上设置镂空结构，从而使得公共电极与像素电极之间的交叠面积减小，实现减小公共电极与像素电极之间的存储电容的目的，从而降低液晶显示面板的驱动电压，减小像素的充电时间，并且降低液晶显示面板的功耗。
以上参照附图说明了本发明的优选实施例，并非因此局限本发明的权利范围。本领域技术人员不脱离本发明的范围和实质内所作的任何修改、等同替换和改进，均应在本发明的权利范围之内。

Claims (12)

  1. 一种液晶显示面板，其中，所述液晶显示面板包括：公共电极、第一像素电极、第二像素电极及钝化层，所述第一像素电极及所述第二像素电极间隔排列，且所述第一像素电极与所述公共电极及所述第二像素电极与所述公共电极部分重叠，所述公共电极与所述第一像素电极的重叠部分及所述公共电极与所述第二像素电极的重叠部分为镂空结构，所述镂空结构的面积小于所述第一像素电极的面积或所述第二像素电极的面积；所述钝化层设置于所述公共电极与所述第一像素电极及所述第二像素电极之间，所述钝化层对应于所述公共电极与所述第一像素电极及所述公共电极与所述第二像素电极的非重叠区域设置有凹槽。
  2. 根据权利要求1所述的液晶显示面板，其中，所述液晶显示面板还包括基板、栅绝缘层、信号线及PFA有机膜层，其中，
    所述栅绝缘层设置于所述基板上方；
    所述信号线间隔设置于所述栅绝缘层上方；
    所述PFA有机膜层覆盖所述信号线并延伸到所述栅绝缘层上；
    所述公共电极设置于所述PFA有机膜层上方；
    所述钝化层覆盖所述公共电极；
    所述第一像素电极及所述第二像素电极间隔设置于所述钝化层上方。
  3. 一种液晶显示面板，其中，所述液晶显示面板包括：公共电极、第一像素电极及第二像素电极，所述第一像素电极及所述第二像素电极间隔排列，且所述第一像素电极与所述公共电极及所述第二像素电极与所述公共电极部分重叠，所述公共电极与所述第一像素电极的重叠部分及所述公共电极与所述第二像素电极的重叠部分为镂空结构。
  4. 根据权利要求3所述的液晶显示面板，其中，所述液晶显示面板还包括钝化层，所述钝化层设置于所述公共电极与所述第一像素电极及所述第二像素电极之间。
  5. 根据权利要求4所述的液晶显示面板，其中，所述钝化层对应于所述公共电极与所述第一像素电极及所述公共电极与所述第二像素电极的非重叠区域设置有凹槽。
  6. 根据权利要求3所述的液晶显示面板，其中，所述镂空结构的面积小于所述第一像素电极的面积或所述第二像素电极的面积。
  7. 根据权利要求4所述的液晶显示面板，其中，所述液晶显示面板还包括基板、栅绝缘层、信号线及PFA有机膜层，其中，
    所述栅绝缘层设置于所述基板上方；
    所述信号线间隔设置于所述栅绝缘层上方；
    所述PFA有机膜层覆盖所述信号线并延伸到所述栅绝缘层上；
    所述公共电极设置于所述PFA有机膜层上方；
    所述钝化层覆盖所述公共电极；
    所述第一像素电极及所述第二像素电极间隔设置于所述钝化层上方。
  8. 一种液晶显示装置，其中，所述液晶显示装置包括液晶显示面板，所述液晶显示面板包括公共电极、第一像素电极及第二像素电极，其中，所述第一像素电极及所述第二像素电极间隔排列，且所述第一像素电极与所述公共电极及所述第二像素电极与所述公共电极部分重叠，所述公共电极与所述第一像素电极的重叠部分及所述公共电极与所述第二像素电极的重叠部分为镂空结构。
  9. 根据权利要求8所述的液晶显示装置，其中，所述液晶显示面板还包括钝化层，所述钝化层设置于所述公共电极与所述第一像素电极及所述第二像素电极之间。
  10. 根据权利要求9所述的液晶显示装置，其中，所述钝化层对应于所述公共电极与所述第一像素电极及所述公共电极与所述第二像素电极的非重叠区域设置有凹槽。
  11. 根据权利要求8所述的液晶显示装置，其中，所述镂空结构的面积小于所述第一像素电极的面积或所述第二像素电极的面积。
  12. 根据权利要求9所述的液晶显示装置，其中，所述液晶显示面板还包括基板、栅绝缘层、信号线及PFA有机膜层，其中，
    所述栅绝缘层设置于所述基板上方；
    所述信号线间隔设置于所述栅绝缘层上方；
    所述PFA有机膜层覆盖所述信号线并延伸到所述栅绝缘层上；
    所述公共电极设置于所述PFA有机膜层上方；
    所述钝化层覆盖所述公共电极；
    所述第一像素电极及所述第二像素电极间隔设置于所述钝化层上方。
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