WO2021168943A1 - Tft液晶显示装置 - Google Patents

Tft液晶显示装置 Download PDF

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Publication number
WO2021168943A1
WO2021168943A1 PCT/CN2020/080168 CN2020080168W WO2021168943A1 WO 2021168943 A1 WO2021168943 A1 WO 2021168943A1 CN 2020080168 W CN2020080168 W CN 2020080168W WO 2021168943 A1 WO2021168943 A1 WO 2021168943A1
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WO
WIPO (PCT)
Prior art keywords
layer
liquid crystal
display device
crystal display
substrate
Prior art date
Application number
PCT/CN2020/080168
Other languages
English (en)
French (fr)
Inventor
朱清永
Original Assignee
Tcl华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Tcl华星光电技术有限公司 filed Critical Tcl华星光电技术有限公司
Priority to US16/761,249 priority Critical patent/US11567372B2/en
Publication of WO2021168943A1 publication Critical patent/WO2021168943A1/zh

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Classifications

    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G02F1/133723—Polyimide, polyamide-imide
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • 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
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—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
    • G02F1/133357—Planarisation 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • This application relates to the field of display technology, and in particular to a liquid crystal display device.
  • TFT-LCD Thin Film Transistor-Liquid Crystal Display
  • COF Chip On Film
  • PCB printed The Circuit Board
  • One end of the COF substrate is bound to the bonding lead of the array substrate, and the other end of the COF substrate is connected to the PCB board.
  • an alignment film is provided on the side of the array substrate, which can provide a pretilt angle for the liquid crystal molecules, so that the liquid crystal molecules are arranged in an orderly manner.
  • the inkjet printing process is a common process for preparing the alignment film, which has the advantages of high efficiency and high utilization rate.
  • the edges of the inkjet ink will spread freely, resulting in poor accuracy.
  • the inkjet ink 20 is wavy after being diffused in the edge area 12. Due to the uneven film thickness of the alignment film, the wavy area needs to be expanded as far as possible to avoid affecting the display area 11 of the liquid crystal display device.
  • the distance between the boundary of the wave region of the alignment film and the edge of the display area of the substrate is about 1200-2400um.
  • the alignment film prepared by the inkjet printing process may completely cover the bound electrodes. Since the alignment film is an insulating material, covering the bonding electrode with the alignment film may cause poor conduction between the COF and the bonding electrode, resulting in abnormal display.
  • the alignment film prepared by the inkjet printing process has the risk of completely covering the bound electrodes. Since the alignment film is an insulating material, covering the bonding electrode with the alignment film may cause poor conduction between the COF and the bonding electrode, resulting in abnormal display.
  • an embodiment of the present application provides a liquid crystal display device, including: an array substrate and a color filter substrate arranged oppositely, and a liquid crystal layer and spacers sandwiched between the array substrate and the color filter substrate, so The array substrate and the color filter substrate are bonded by a frame sealant.
  • the liquid crystal display device includes a display area and a non-display area located outside the display area.
  • the non-display area is also provided with a binding area located in A binding electrode is formed on a part of the binding area on the array substrate, and a first alignment film is further provided on the array substrate;
  • a first retaining wall is provided on the binding electrode on the side close to the edge of the display area, and the first retaining wall is used to separate the first alignment film and the binding electrode;
  • the retaining wall is an arc-shaped protrusion structure, and the protrusion direction of the arc-shaped protrusion structure corresponds to the first alignment film.
  • the height of the arc-shaped protrusion structure ranges from 2 to 4 um, and the arc line width of the arc-shaped protrusion structure is 5 to 50 um.
  • the array substrate has a first base substrate and a plurality of thin film transistor array layers on the first base substrate, and the thin film transistor array layer includes a buffer layer, Gate metal layer, gate insulating layer, inter insulating layer, source and drain metal layer, pixel electrode layer, planarization layer and passivation layer.
  • the color filter substrate includes a second base substrate, a color filter layer, a common electrode layer, and a second alignment film layer.
  • the materials of the first alignment film layer and the second alignment film layer are both polyimide.
  • the color filter layer includes a color filter layer and a black matrix
  • the color filter layer includes a plurality of red color resists, a plurality of green color resists, and a plurality of blue color resists.
  • the black matrix is arranged between any two of the red color resist, the green color resist and the blue color resist.
  • the first barrier wall and the spacer, the red color resist, the green color resist, the blue color resist, the gate metal layer, the The material of any one of the source and drain metal layers and the planarization layer is the same.
  • the liquid crystal display device further includes a chip-on-film substrate, one end of the chip-on-film substrate is adhered to the binding electrode through a first adhesive layer, and the coating The other end of the crystal film substrate is adhered to the printed circuit board through the first adhesive layer.
  • the first adhesive layer is an anisotropic conductive adhesive.
  • an embodiment of the present application further provides a liquid crystal display device, comprising: an array substrate and a color filter substrate arranged oppositely, and a liquid crystal layer and spacers sandwiched between the array substrate and the color filter substrate, The array substrate and the color filter substrate are bonded by a frame sealant, the liquid crystal display device includes a display area and a non-display area located outside the display area, and a binding area is also provided in the non-display area, A binding electrode is formed on a part of the array substrate located in the binding area, and a first alignment film is further provided on the array substrate;
  • a first retaining wall is provided on the binding electrode on the side close to the edge of the display area, and the first retaining wall is used to separate the first alignment film and the binding electrode.
  • the array substrate has a first base substrate and a plurality of thin film transistor array layers on the first base substrate, and the thin film transistor array layer includes a buffer layer, Gate metal layer, gate insulating layer, inter insulating layer, source and drain metal layer, pixel electrode layer, planarization layer and passivation layer.
  • the color filter substrate includes a second base substrate, a color filter layer, a common electrode layer, and a second alignment film layer.
  • the materials of the first alignment film layer and the second alignment film layer are both polyimide.
  • the color filter layer includes a color filter layer and a black matrix
  • the color filter layer includes a plurality of red color resists, a plurality of green color resists, and a plurality of blue color resists.
  • the black matrix is arranged between any two of the red color resist, the green color resist and the blue color resist.
  • the first barrier wall and the spacer, the red color resist, the green color resist, the blue color resist, the gate metal layer, the The material of any one of the source and drain metal layers and the planarization layer is the same.
  • the liquid crystal display device further includes a chip-on-film substrate, one end of the chip-on-film substrate is adhered to the binding electrode through a first adhesive layer, and the coating The other end of the crystal film substrate is adhered to the printed circuit board through the first adhesive layer.
  • the first adhesive layer is an anisotropic conductive adhesive.
  • the liquid crystal display device provided by the embodiments of the present application has a barrier structure between the alignment film on the side of the array substrate and the binding electrode, which can prevent the inkjet ink for preparing the alignment film from covering the binding electrode. It prevents poor conduction between the COF substrate and the bonding electrode, and further improves the display effect of the liquid crystal display device without increasing the process.
  • FIG. 1 is a schematic diagram of the inkjet ink spreading along the display frame during the process of preparing the alignment film by the inkjet printing process in the existing liquid crystal display device.
  • FIG. 2 is a schematic plan view of a liquid crystal display device provided by an embodiment of the application.
  • Fig. 3 is a partial enlarged view of part A in Fig. 2.
  • FIG. 4 is a schematic cross-sectional view of a liquid crystal display device provided by an embodiment of the application.
  • Fig. 5 is a schematic plan view of the area where the first retaining wall in Fig. 4 is located.
  • FIG. 2 it is a schematic plan view of a liquid crystal display device 30 provided by an embodiment of this application.
  • the liquid crystal display device 30 has a display area 31 and a non-display area 32 located outside the display area 31, and a binding area 321 is also provided in the non-display area 32.
  • FIG. 3 it is a partial enlarged view of part A in FIG. 2.
  • a binding electrode 3211 is also provided in the binding area 321.
  • the liquid crystal display panel includes an array substrate 40, a color filter substrate 50, and a liquid crystal layer 60 arranged between the array substrate 40 and the color filter substrate 50, which are arranged relatively parallel; the edge of the array substrate 40 The two ends and the two edge ends of the color filter substrate 50 are bonded by a frame sealant 70.
  • the liquid crystal display device further includes a display area 31 and a non-display area 32 located outside the display area 31.
  • the non-display area 32 is also provided with a binding area 321, which is located in a part of the binding area 321.
  • a bonding electrode 91 (bonding lead) is formed on the array substrate 40, and a first alignment film 43 is further provided on the array substrate 40;
  • the binding electrode 91 is provided with a first retaining wall 80 on the side close to the edge of the display area 31, and the first retaining wall 80 is used to separate the first alignment film 43 and the binding electrode. 91.
  • a spacer 61 (Photo spacer) is further provided between the array substrate 40 and the color filter substrate 50, and the spacer 61 is formed on the side of the array substrate 40.
  • the spacer 61 may be made of polyimide material by photolithography or printing.
  • the array substrate 40 also has a first base substrate 41 and a plurality of thin film transistor array layers 42 located on the first base substrate 41.
  • the thin film transistor array layer 42 includes a buffer layer and a gate metal. Layer, gate insulating layer, inter-insulating layer, source and drain metal layer, pixel electrode layer, planarization layer and passivation layer (all not shown).
  • the color filter substrate 50 includes a second base substrate 51, a color filter layer 52, a common electrode layer 53, and a second alignment film layer 54 in order from top to bottom.
  • the color filter layer 52 includes a color filter layer 521 and a black matrix 522
  • the color filter layer 521 includes a plurality of red color resistors 5211, a plurality of green color resistors 5212, and a plurality of blue color resistors 5213.
  • the black matrix 522 is provided between any two of the red color resistor 5211, the green color resistor 5212 and the blue color resistor 5213.
  • the liquid crystal display device located in the bonding area 321 further includes a chip on film substrate 93 (Chip On Film, COF), one end of the chip on film substrate 93 is adhered to the binding electrode 91 through the first adhesive layer 92, and the other end of the chip on film substrate 93 passes through the first adhesive layer 92 and printed circuit board 94 (Printed Circuit Board, PCB) are adhered to each other, so that the printed circuit board 94 can output drive control signals to the liquid crystal display panel to complete corresponding drive control.
  • the first adhesive layer 92 is an anisotropic conductive film (ACF).
  • the liquid crystal layer 60 includes liquid crystal molecules, a photoinitiator, and a polymerizable monomer that can undergo polymerization under ultraviolet light irradiation.
  • the liquid crystal molecules are nematic liquid crystal molecules and have a negative dielectric anisotropy constant.
  • the frame sealant 70 can effectively bond the array substrate 40 and the color filter substrate 50.
  • the frame sealing glue 70 is completely cured through an ultraviolet curing process and a thermal curing process.
  • FIG. 5 it is a schematic plan view of the area where the first retaining wall 80 described in FIG. 4 is located.
  • the first retaining wall 80 is an arc-shaped protrusion structure
  • the protrusion direction of the arc-shaped protrusion structure corresponds to the first alignment film 43.
  • the inkjet ink for preparing the first alignment film 43 has the characteristic of bypassing the circular via hole due to the influence of the surface tension of the liquid. Therefore, arranging the first retaining wall 80 as an arc-shaped protrusion structure can make the inkjet ink for preparing the first alignment film 43 easier to diffuse along the arc tangent direction of the arc-shaped protrusion structure. Furthermore, it is avoided that the inkjet ink for preparing the first alignment film 43 covers the binding electrode 91.
  • the materials of the first alignment film layer 43 and the second alignment film layer 54 are both polyimide.
  • the first alignment film layer 43 and the second alignment film layer 54 are both formed by an inkjet printing process using polyimide inkjet ink.
  • the first alignment film layer 43 and the second alignment film layer 54 are vertical alignment layers.
  • the first alignment film layer 43 and the second alignment film layer 54 are both photo-alignment layers. When the photo-alignment layer is irradiated with ultraviolet light, a certain pretilt angle is formed so that the liquid crystal layer 60 The rotation direction of the liquid crystal molecules is more consistent.
  • the first retaining wall 80 and the spacer 61, the red color resistor 5211, the green color resistor 5212, the blue color resistor 5213, the gate metal layer, the source and drain The material of any one of the metal layer and the planarization layer is the same.
  • the height and the arc line width of the arc-shaped protrusion structure can be precisely determined according to the process.
  • the height range of the arc-shaped protrusion structure is preferably 2 ⁇ 4um, and the arc width of the arc-shaped protrusion structure is preferably 5-50um.
  • the liquid crystal display device provided by the embodiment of the present application only changes the design of the frame area, does not increase the manufacturing process, and does not affect the display of the display area 31.
  • a barrier structure is provided between the alignment film on the side of the array substrate and the binding electrode, which can prevent the inkjet ink for preparing the alignment film from covering the binding electrode and prevent COF
  • the poor conduction between the substrate and the bonding electrode further improves the display effect of the liquid crystal display device without increasing the process.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Liquid Crystal (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

本申请公开了一种液晶显示装置，包括显示区域以及非显示区域，所述非显示区域内还设置有绑定区域，位于所述绑定区域的部分所述阵列基板上形成有绑定电极，所述阵列基板上还设置有第一配向膜；其中，所述绑定电极上靠近所述显示区域的边缘一侧设置有第一挡墙，所述第一挡墙用于分隔所述第一配向膜与所述绑定电极。

Description

TFT液晶显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种液晶显示装置。
 背景技术
在薄膜晶体管液晶显示器(Thin Film Transistor-Liquid Crystal Display，TFT-LCD)中，通常使用覆晶薄膜基板(Chip On Film，COF)将印刷电路板(Printed Circuit Board，PCB)和液晶面板连接到一起，从而使PCB板能够将驱动控制信号输出至液晶面板，完成相应的驱动控制。COF基板的一端绑定在阵列基板的绑定电极(bonding lead)上，COF基板的另一端连接PCB板。
在目前的液晶显示装置中，阵列基板侧设有配向膜，可以给液晶分子提供一个预倾角，使液晶分子有序排列。喷墨打印工艺是制备配向膜的常用工艺，具有效率高、利用率高等优点。在喷墨打印制备配向膜的过程中，喷墨墨水边缘会自由扩散，精度较差。如图1所示，喷墨墨水20在边缘区12扩散后呈波浪形，波浪区域因配向膜的膜厚不均，需尽量外扩以避免影响液晶显示装置的显示区域11。配向膜波浪区边界距基板的显示区域边缘一般距离约为1200~2400um。然而，对于边框小于2.4mm的窄边框产品，喷墨打印工艺制备的配向膜，有完全覆盖绑定电极的风险。因配向膜为绝缘材料，配向膜覆盖绑定电极会导致COF与绑定电极导通不良，造成显示异常。
因此，需要寻求一种液晶显示装置来解决上述问题。
 技术问题
现有的液晶显示装置，对于边框小于2.4mm的窄边框产品，喷墨打印工艺制备的配向膜，有完全覆盖绑定电极的风险。因配向膜为绝缘材料，配向膜覆盖绑定电极会导致COF与绑定电极导通不良，造成显示异常。
 技术解决方案
第一方面，本申请实施例提供一种液晶显示装置，包括：相对设置的阵列基板和彩膜基板以及夹设于所述阵列基板和所述彩膜基板之间的液晶层和间隔柱，所述阵列基板与所述彩膜基板通过封框胶粘合，所述液晶显示装置包括显示区域以及位于所述显示区域外侧的非显示区域，所述非显示区域内还设置有绑定区域，位于所述绑定区域的部分所述阵列基板上形成有绑定电极，所述阵列基板上还设置有第一配向膜；
其中，所述绑定电极上靠近所述显示区域的边缘一侧设置有第一挡墙，所述第一挡墙用于分隔所述第一配向膜与所述绑定电极；所述第一挡墙为弧形凸起结构，所述弧形凸起结构的凸起方向对应于所述第一配向膜。
在本申请实施例提供的液晶显示装置中，所述弧形凸起结构的高度范围为2~4um，所述弧形凸起结构的弧线宽为5~50um。
在本申请实施例提供的液晶显示装置中，所述阵列基板具有第一衬底基板以及位于所述第一衬底基板上的多个薄膜晶体管阵列层，所述薄膜晶体管阵列层包括缓冲层、栅极金属层、栅绝缘层、间绝缘层、源漏极金属层、像素电极层、平坦化层以及钝化层。
在本申请实施例提供的液晶显示装置中，所述彩膜基板包括第二衬底基板、彩膜层、公共电极层以及第二配向膜层。
在本申请实施例提供的液晶显示装置中，所述第一配向膜层以及所述第二配向膜层的材料均为聚酰亚胺。
在本申请实施例提供的液晶显示装置中，所述彩膜层包括彩色滤光层以及黑色矩阵，所述彩色滤光层包括多个红色色阻、多个绿色色阻以及多个蓝色色阻，所述红色色阻、所述绿色色阻以及所述蓝色色阻中的任意两者之间设置所述黑色矩阵。
在本申请实施例提供的液晶显示装置中，所述第一挡墙与所述间隔柱、所述红色色阻、所述绿色色阻、所述蓝色色阻、所述栅极金属层、所述源漏极金属层以及所述平坦化层中任意一种的材料相同。
在本申请实施例提供的液晶显示装置中，所述液晶显示装置还包括覆晶薄膜基板，所述覆晶薄膜基板的一端通过第一粘结层与所述绑定电极相粘连，所述覆晶薄膜基板的另一端通过所述第一粘结层与印刷电路板相粘连。
在本申请实施例提供的液晶显示装置中，所述第一粘结层为异方性导电胶。
第二方面，本申请实施例还提供一种液晶显示装置，包括：相对设置的阵列基板和彩膜基板以及夹设于所述阵列基板和所述彩膜基板之间的液晶层和间隔柱，所述阵列基板与所述彩膜基板通过封框胶粘合，所述液晶显示装置包括显示区域以及位于所述显示区域外侧的非显示区域，所述非显示区域内还设置有绑定区域，位于所述绑定区域的部分所述阵列基板上形成有绑定电极，所述阵列基板上还设置有第一配向膜；
其中，所述绑定电极上靠近所述显示区域的边缘一侧设置有第一挡墙，所述第一挡墙用于分隔所述第一配向膜与所述绑定电极。
在本申请实施例提供的液晶显示装置中，所述阵列基板具有第一衬底基板以及位于所述第一衬底基板上的多个薄膜晶体管阵列层，所述薄膜晶体管阵列层包括缓冲层、栅极金属层、栅绝缘层、间绝缘层、源漏极金属层、像素电极层、平坦化层以及钝化层。
在本申请实施例提供的液晶显示装置中，所述彩膜基板包括第二衬底基板、彩膜层、公共电极层以及第二配向膜层。
在本申请实施例提供的液晶显示装置中，所述第一配向膜层以及所述第二配向膜层的材料均为聚酰亚胺。
在本申请实施例提供的液晶显示装置中，所述彩膜层包括彩色滤光层以及黑色矩阵，所述彩色滤光层包括多个红色色阻、多个绿色色阻以及多个蓝色色阻，所述红色色阻、所述绿色色阻以及所述蓝色色阻中的任意两者之间设置所述黑色矩阵。
在本申请实施例提供的液晶显示装置中，所述第一挡墙与所述间隔柱、所述红色色阻、所述绿色色阻、所述蓝色色阻、所述栅极金属层、所述源漏极金属层以及所述平坦化层中任意一种的材料相同。
在本申请实施例提供的液晶显示装置中，所述液晶显示装置还包括覆晶薄膜基板，所述覆晶薄膜基板的一端通过第一粘结层与所述绑定电极相粘连，所述覆晶薄膜基板的另一端通过所述第一粘结层与印刷电路板相粘连。
在本申请实施例提供的液晶显示装置中，所述第一粘结层为异方性导电胶。
 有益效果
相较于现有技术，本申请实施例提供的液晶显示装置，在阵列基板侧的配向膜与绑定电极之间设置一挡墙结构，能够避免制备配向膜的喷墨墨水覆盖绑定电极，防止COF基板与绑定电极导通不良，在不增加工艺制程的基础上进一步提升了液晶显示装置的显示效果。
 附图说明
图1为现有的液晶显示装置中使用喷墨打印工艺制备配向膜过程中喷墨墨水沿显示边框扩散的示意图。
图2为本申请实施例提供的液晶显示装置的平面示意图。
图3为图2中A部位的局部放大图。
图4为本申请实施例提供的液晶显示装置的截面示意图。
图5为图4中第一挡墙所在区域的平面示意图。
 本发明的实施方式
如图2所示，为本申请实施例提供的液晶显示装置30的平面示意图。其中，所述液晶显示装置30具有显示区域31以及位于所述显示区域31外侧的非显示区域32，所述非显示区域32内还设置有绑定区域321。
具体地，如图3所示，为图2中A部位的局部放大图。其中，所述绑定区域321内还设置有绑定电极3211。
如图4所示，为本申请实施例提供的液晶显示装置的截面示意图。其中，所述液晶显示面板包括相对平行设置的阵列基板40、彩膜基板50、及设置在所述阵列基板40与所述彩膜基板50之间的液晶层60；所述阵列基板40的边缘两端与所述彩膜基板50的边缘两端通过封框胶70粘合。所述液晶显示装置还包括显示区域31以及位于所述显示区域31外侧的非显示区域32，所述非显示区域32内还设置有绑定区域321，位于所述绑定区域321的部分所述阵列基板40上形成有绑定电极91（bonding lead），所述阵列基板40上还设置有第一配向膜43；
其中，所述绑定电极91上靠近所述显示区域31的边缘一侧设置有第一挡墙80，所述第一挡墙80用于分隔所述第一配向膜43与所述绑定电极91。
具体地，所述阵列基板40与所述彩膜基板50之间还设置有间隔柱61（Photo spacer），所述间隔柱61形成于所述阵列基板40侧。所述间隔柱61可以由聚酰亚胺材料通过光刻或印刷制成。
具体地，所述阵列基板40还具有第一衬底基板41以及位于所述第一衬底基板41上的多个薄膜晶体管阵列层42，所述薄膜晶体管阵列层42包括缓冲层、栅极金属层、栅绝缘层、间绝缘层、源漏极金属层、像素电极层、平坦化层以及钝化层（均未图示）。
具体地，所述彩膜基板50由上至下依次包括第二衬底基板51、彩膜层52、公共电极层53以及第二配向膜层54。其中，所述彩膜层52包括彩色滤光层521以及黑色矩阵522，所述彩色滤光层521包括多个红色色阻5211、多个绿色色阻5212以及多个蓝色色阻5213，所述红色色阻5211、所述绿色色阻5212以及所述蓝色色阻5213中的任意两者之间设置所述黑色矩阵522。
具体地，所述液晶显示装置位于所述绑定区域321还包括覆晶薄膜基板93（Chip On Film，COF），所述覆晶薄膜基板93的一端通过第一粘结层92与所述绑定电极91相粘连，所述覆晶薄膜基板93的另一端通过所述第一粘结层92与印刷电路板94(Printed Circuit Board，PCB)相粘连，从而能够使所述印刷电路板94能够将驱动控制信号输出至液晶显示面板，完成相应的驱动控制。其中，所述第一粘结层92为异方性导电胶（Anisotropic Conductive Film，ACF）。
具体地，所述液晶层60包括液晶分子、光引发剂以及在紫外光照射下可发生聚合反应的可聚合单体。其中，所述液晶分子为向列液晶分子，具有负介电各向异性常数。
具体地，所述封框胶70能够有效地将所述阵列基板40与所述彩膜基板50粘合。其中，所述封框胶70经紫外光固化工艺以及热固化工艺完全固化而成。
如图5所示，为图4中所述第一挡墙80所在区域的平面示意图。其中，所述第一挡墙80为弧形凸起结构，所述弧形凸起结构的凸起方向对应于所述第一配向膜43。由于制备所述第一配向膜43的喷墨墨水因液体表面张力的影响有绕过圆形过孔的特点。因此，将所述第一挡墙80设置为弧形凸起结构，可以使制备所述第一配向膜43的喷墨墨水更容易沿着所述弧形凸起结构的弧形切线方向扩散，进而避免制备所述第一配向膜43的喷墨墨水覆盖所述绑定电极91。
具体地，所述第一配向膜层43以及所述第二配向膜层54的材料均为聚酰亚胺。所述第一配向膜层43以及所述第二配向膜层54均是采用聚酰亚胺喷墨墨水通过喷墨打印工艺成型。优选地，所述第一配向膜层43以及所述第二配向膜层54为垂直配向层。进一步的，所述第一配向膜层43以及所述第二配向膜层54均为光配向层，当使用紫外光照射光配向层时，会形成一定的预倾角，以使得所述液晶层60中的液晶分子的旋转方向一致性更好。
具体地，所述第一挡墙80与所述间隔柱61、所述红色色阻5211、所述绿色色阻5212、所述蓝色色阻5213、所述栅极金属层、所述源漏极金属层以及所述平坦化层中任意一种的材料相同。
其中，制备所述第一挡墙80需在所述绑定电极91靠近所述显示区31的一侧设计弧形曝光区，并通过曝光显影等正常制程形成所述弧形凸起结构，无需新增制程工艺。
具体地，所述弧形凸起结构的高度和弧线宽可依照工艺精确制定。所述弧形凸起结构的高度范围优选为2~4um，所述弧形凸起结构的弧线宽优选为5~50um。
本申请实施例提供的液晶显示装置，仅仅变更边框区设计，不增加工艺制程，不影响所述显示区域31的显示。
以上各个操作的具体实施可参见前面的实施例，在此不再赘述。
综上所述，本申请实施例提供的液晶显示装置，在阵列基板侧的配向膜与绑定电极之间设置一挡墙结构，能够避免制备配向膜的喷墨墨水覆盖绑定电极，防止COF基板与绑定电极导通不良，在不增加工艺制程的基础上进一步提升了液晶显示装置的显示效果。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (17)

  1. 一种液晶显示装置，其中，包括：相对设置的阵列基板和彩膜基板以及夹设于所述阵列基板和所述彩膜基板之间的液晶层和间隔柱，所述阵列基板与所述彩膜基板通过封框胶粘合，所述液晶显示装置包括显示区域以及位于所述显示区域外侧的非显示区域，所述非显示区域内还设置有绑定区域，位于所述绑定区域的部分所述阵列基板上形成有绑定电极，所述阵列基板上还设置有第一配向膜；
    其中，所述绑定电极上靠近所述显示区域的边缘一侧设置有第一挡墙，所述第一挡墙用于分隔所述第一配向膜与所述绑定电极；所述第一挡墙为弧形凸起结构，所述弧形凸起结构的凸起方向对应于所述第一配向膜。
  2. 如权利要求1所述的液晶显示装置，其中，所述弧形凸起结构的高度范围为2~4um，所述弧形凸起结构的弧线宽为5~50um。
  3. 如权利要求1所述的液晶显示装置，其中，所述阵列基板具有第一衬底基板以及位于所述第一衬底基板上的多个薄膜晶体管阵列层，所述薄膜晶体管阵列层包括缓冲层、栅极金属层、栅绝缘层、间绝缘层、源漏极金属层、像素电极层、平坦化层以及钝化层。
  4. 如权利要求1所述的液晶显示装置，其中，所述彩膜基板包括第二衬底基板、彩膜层、公共电极层以及第二配向膜层。
  5. 如权利要求4所述的液晶显示装置，其中，所述第一配向膜层以及所述第二配向膜层的材料均为聚酰亚胺。
  6. 如权利要求4所述的液晶显示装置，其中，所述彩膜层包括彩色滤光层以及黑色矩阵，所述彩色滤光层包括多个红色色阻、多个绿色色阻以及多个蓝色色阻，所述红色色阻、所述绿色色阻以及所述蓝色色阻中的任意两者之间设置所述黑色矩阵。
  7. 如权利要求3所述的液晶显示装置，其中，所述第一挡墙与所述间隔柱、所述红色色阻、所述绿色色阻、所述蓝色色阻、所述栅极金属层、所述源漏极金属层以及所述平坦化层中任意一种的材料相同。
  8. 如权利要求1所述的液晶显示装置，其中，所述液晶显示装置还包括覆晶薄膜基板，所述覆晶薄膜基板的一端通过第一粘结层与所述绑定电极相粘连，所述覆晶薄膜基板的另一端通过所述第一粘结层与印刷电路板相粘连。
  9. 如权利要求8所述的液晶显示装置，其中，所述第一粘结层为异方性导电胶。
  10. 一种液晶显示装置，其中，包括：相对设置的阵列基板和彩膜基板以及夹设于所述阵列基板和所述彩膜基板之间的液晶层和间隔柱，所述阵列基板与所述彩膜基板通过封框胶粘合，所述液晶显示装置包括显示区域以及位于所述显示区域外侧的非显示区域，所述非显示区域内还设置有绑定区域，位于所述绑定区域的部分所述阵列基板上形成有绑定电极，所述阵列基板上还设置有第一配向膜；
    其中，所述绑定电极上靠近所述显示区域的边缘一侧设置有第一挡墙，所述第一挡墙用于分隔所述第一配向膜与所述绑定电极。
  11. 如权利要求10所述的液晶显示装置，其中，所述阵列基板具有第一衬底基板以及位于所述第一衬底基板上的多个薄膜晶体管阵列层，所述薄膜晶体管阵列层包括缓冲层、栅极金属层、栅绝缘层、间绝缘层、源漏极金属层、像素电极层、平坦化层以及钝化层。
  12. 如权利要求10所述的液晶显示装置，其中，所述彩膜基板包括第二衬底基板、彩膜层、公共电极层以及第二配向膜层。
  13. 如权利要求12所述的液晶显示装置，其中，所述第一配向膜层以及所述第二配向膜层的材料均为聚酰亚胺。
  14. 如权利要求12所述的液晶显示装置，其中，所述彩膜层包括彩色滤光层以及黑色矩阵，所述彩色滤光层包括多个红色色阻、多个绿色色阻以及多个蓝色色阻，所述红色色阻、所述绿色色阻以及所述蓝色色阻中的任意两者之间设置所述黑色矩阵。
  15. 如权利要求11所述的液晶显示装置，其中，所述第一挡墙与所述间隔柱、所述红色色阻、所述绿色色阻、所述蓝色色阻、所述栅极金属层、所述源漏极金属层以及所述平坦化层中任意一种的材料相同。
  16. 如权利要求10所述的液晶显示装置，其中，所述液晶显示装置还包括覆晶薄膜基板，所述覆晶薄膜基板的一端通过第一粘结层与所述绑定电极相粘连，所述覆晶薄膜基板的另一端通过所述第一粘结层与印刷电路板相粘连。
  17. 如权利要求16所述的液晶显示装置，其中，所述第一粘结层为异方性导电胶。
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