WO2016090677A1 - 一种液晶显示器和用于其的双面胶带 - Google Patents

一种液晶显示器和用于其的双面胶带 Download PDF

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Publication number
WO2016090677A1
WO2016090677A1 PCT/CN2014/094824 CN2014094824W WO2016090677A1 WO 2016090677 A1 WO2016090677 A1 WO 2016090677A1 CN 2014094824 W CN2014094824 W CN 2014094824W WO 2016090677 A1 WO2016090677 A1 WO 2016090677A1
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WO
WIPO (PCT)
Prior art keywords
adhesive
liquid crystal
crystal display
crystal panel
bonding substance
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PCT/CN2014/094824
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English (en)
French (fr)
Inventor
周革革
Original Assignee
深圳市华星光电技术有限公司
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Priority to US14/417,158 priority Critical patent/US9829731B2/en
Publication of WO2016090677A1 publication Critical patent/WO2016090677A1/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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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

  • the present invention relates to a liquid crystal display and a double-sided tape therefor.
  • liquid crystal displays have become an indispensable component of electronic products such as mobile phones and computers, as well as related mechanical devices. They can transmit certain information to people through display content so that people can know the information in time.
  • the conventional liquid crystal display 100 mainly includes a liquid crystal panel 20 and a double-sided tape 30, and a backlight unit 50 adhered to the liquid crystal panel 20 by a double-sided tape 30.
  • the backlight unit 50 includes a back plate 501, a bezel 503, and an optical film set 502.
  • One surface of the double-sided tape 30 is connected to the liquid crystal panel 20, and the other surface is connected to the bezel 503 and the optical film group 502.
  • the liquid crystal display 100 When the liquid crystal display 100 is inspected, it is necessary to apply two outward forces F1 and F2 to the liquid crystal panel 20 and the backlight unit 50 on one side of the liquid crystal display 100, respectively, so that the liquid crystal panel 20 and the backlight unit 50 can be gradually separated.
  • the double-sided tape 30 After the liquid crystal panel 20 is separated from the backlight unit 50, the double-sided tape 30 is highly likely to remain on the liquid crystal panel 20, so that the double-sided tape 30 and the optical film group 502 are separated from each other.
  • the double-sided tape 30 that is detached from the optical film group 502 breaks the positional relationship between the films in the optical film group 502, so that the optical film group 502 is damaged, and the liquid crystal display after reassembly is not normally used.
  • an object of the present invention is to provide a liquid crystal display capable of preventing a double-sided tape from remaining on a liquid crystal panel after the backlight unit is separated from the optical film group, thereby not damaging the optical film.
  • the positional relationship between the diaphragms ensures that the liquid crystal display after reassembly can be used normally.
  • the present invention provides a liquid crystal display comprising: a liquid crystal panel; a backlight unit including a back plate and an optical film set disposed between the back plate and the liquid crystal panel, and disposed between the back plate and the liquid crystal panel and surrounding a plastic frame outside the optical film set; a double-sided tape comprising a first surface coated with a first adhesive and connected to the liquid crystal panel through a first adhesive, and coated with a second adhesive and passed through the first a second surface to which the second adhesive is attached to the backsheet and the optical film set, respectively.
  • the adhesion strength of the first adhesive to the liquid crystal panel is lower than the adhesion strength of the second adhesive to the optical film set.
  • the bonding substance in the first adhesive is different from the adhesive substance in the first adhesive, and the viscosity of the bonding substance in the first adhesive is lower than the viscosity of the bonding substance in the second adhesive.
  • the concentration of the binding substance in an adhesive is lower than or equal to the concentration of the binding substance.
  • the bonding material in the first and second adhesives is the same, but the concentration of the bonding material in the first adhesive is lower than the concentration of the bonding material in the second adhesive.
  • the optical film set includes a diffusion film, a brightness enhancement film, a diffusion film, a light guide plate, and a reflective film which are sequentially disposed from the liquid crystal panel toward the back plate.
  • the liquid crystal panel includes a polarizing film, a color filter substrate, a liquid crystal layer, an array substrate, a polarizer, a driving circuit, and a printed circuit board which are sequentially stacked.
  • the first and second adhesives are all acrylic adhesives.
  • the present invention also provides a double-sided tape for a liquid crystal display, comprising a first surface coated with a first adhesive and connectable to a liquid crystal panel of the liquid crystal display through a first adhesive, and coated
  • the second adhesive may be a second surface that is connected to the back sheet of the liquid crystal display and the optical film set by the second adhesive, respectively.
  • the adhesion strength of the first adhesive to the liquid crystal panel is lower than the adhesion strength of the second adhesive to the optical film set.
  • the bonding substance in the first adhesive is different from the adhesive substance in the first adhesive, and the viscosity of the bonding substance in the first adhesive is lower than the viscosity of the bonding substance in the second adhesive.
  • the concentration of the binding substance in the adhesive is lower than or equal to the concentration of the bonding substance.
  • the bonding material in the first and second adhesives is the same, but the concentration of the bonding material in the first adhesive is lower than the concentration of the bonding material in the second adhesive.
  • the first and second adhesives are all acrylic adhesives.
  • the double-sided tape of the liquid crystal display of the present invention has to be separated from the liquid crystal panel and left on the optical film and the plastic frame so as not to break the position between the optical film groups in the optical film group. Relationship, to ensure that the reassembled LCD monitor can be used normally.
  • liquid crystal display according to the present invention has a simple structure, convenient processing, easy assembly, safe use, and convenient implementation and popularization.
  • FIG. 1 is a schematic structural view of a liquid crystal panel of the prior art.
  • FIG. 2 is a schematic structural view of a liquid crystal display according to the present invention.
  • FIG. 2 shows a liquid crystal display 10 in accordance with the present invention.
  • the liquid crystal display 10 can be applied to electronic products such as mobile phones and computers, and related mechanical devices, and transmits certain information to people through display contents, so that people can know the information in time.
  • the liquid crystal display 10 includes a rectangular liquid crystal panel 2 and a frame type double-sided tape 3, and a backlight unit 5 connected to the liquid crystal panel 2 through a double-sided tape 3.
  • the backlight unit 5 is capable of supplying a light source to the liquid crystal panel 2 to ensure that the liquid crystal panel 2 can clearly display a picture.
  • the liquid crystal panel 2 can be selected as a TFT-LCD liquid crystal panel (ie, a liquid crystal panel of a thin film transistor liquid crystal display), and includes a polarizing film 21 and a color filter substrate 22 which are sequentially arranged from the top to the bottom direction (ie, the A direction).
  • the driving circuit, the liquid crystal layer, the color filter substrate 22, the array substrate 23, and the printed circuit board are all well-known to those skilled in the art, and are not described herein again.
  • the backlight unit 5 may include a back plate 51 and an optical film group 52 disposed between the back plate 51 and the liquid crystal panel 2, and between the back plate 51 and the liquid crystal panel 2 and surrounding the group of the optical film group 52.
  • the optical film group 52 includes a diffusion film 521, a brightness enhancement film 522, a diffusion film 523, a light guide plate 524, and a reflection film 525 which are sequentially distributed from the liquid crystal panel 2 toward the back plate 51 (ie, the A direction).
  • the backlight unit 5 further includes a light source disposed between the light guide sheet 524 and the bezel 53. Wherein, the light source may be selected as an LED lamp capable of adjusting brightness to adjust the brightness of the liquid crystal display 10.
  • the optical film set 52 has other forms of structure, such as a structure formed by adding or subtracting the corresponding film.
  • the double-sided tape 3 consists of a substrate and an adhesive.
  • the substrate may be formed from paper, cloth or plastic film, and the adhesive may be an environmentally friendly adhesive such as acrylic (ie, acrylic and methacrylic).
  • the substrate has a first surface 3a and a second surface 3b opposite thereto.
  • the adhesive includes a first adhesive coated on the first surface 3a, and a second adhesive coated on the second surface 3b.
  • the first surface 3a of the double-sided tape 3 is connected to the liquid crystal panel 2 by a first adhesive
  • the second surface 3b is connected to the diffusion film 521 of the backing plate 51 and the optical film group 52 by a second adhesive, respectively.
  • the liquid crystal panel 2 and the backlight unit 5 can be firmly fixed together by the double-sided tape 3.
  • the adhesion strength of the first adhesive to the liquid crystal panel 2 needs to be lower than that of the second adhesive to the optical film.
  • the adhesion strength of group 52 Since the adhesion strength of the same second adhesive to the glass optical film set 52 is lower than that of the rubber plastic frame 53, and the adhesion strength of the first adhesive to the liquid crystal panel 2 is low.
  • the adhesion strength of the second adhesive to the optical film set 52 so that the adhesion strength of the first adhesive to the liquid crystal panel 2 is lower than the adhesion strength of the second adhesive to the optical film set 52. It is lower than the adhesion strength of the second adhesive to the plastic frame 53. Wherein the adhesion strength is actually the adhesion per unit area, and the adhesion is equal to the adhesion strength multiplied by the contact area at the adhesion.
  • the adhesion strength of the first adhesive to the liquid crystal panel 2 is
  • the adhesion strength of the second adhesive to the optical film group 52 is lower than that of the second adhesive to the plastic frame 53, so that the double-sided tape 3 has to be separated from the liquid crystal panel 2 and left in the optical
  • the diaphragm group 52 and the plastic frame 53 can prevent the structure of the optical film group 52 from being damaged, and the liquid crystal display 10 after reassembly can be normally applied.
  • the bonding substance in the first adhesive is different from the adhesive substance in the first adhesive, and the viscosity of the bonding substance in the first adhesive is lower than the viscosity of the bonding substance in the second adhesive.
  • the concentration of the binding substance in the first adhesive is lower than or equal to the concentration of the bonding substance. In this way, the adhesion strength between the first surface 3a and the liquid crystal panel 2 can be effectively reduced, and the double-sided tape 3 can be smoothly separated from the liquid crystal panel 2, thereby remaining on the bezel 53 and the optical film group 52.
  • the bonding substance is also called a binder, which is an essential component in the adhesive and acts as a bonding.
  • the first and second adhesives have the same bonding substance, but the first adhesive The concentration of the bonding substance inside is lower than the concentration of the bonding substance in the second adhesive. In this way, the adhesion strength between the first surface 3a and the liquid crystal panel 2 can be effectively reduced, and the double-sided tape 3 can be smoothly separated from the liquid crystal panel 2, thereby remaining on the bezel 53 and the optical film group 52.
  • the backing plate 51 includes a bottom portion 51a and a side portion 51b fixedly coupled to the edge of the bottom portion 51a.
  • the side portion 51b surrounds the plastic frame 53 and functions as a positioning plastic frame 53, and can ensure that the plastic frame 53 is not easily deformed.
  • the second surface 3b of the double-sided tape 3 may also be bonded to the top end of the side portion 51b to enhance the stability of the bezel 53 in the backlight unit 5.
  • the double-sided tape 3 of the liquid crystal display 10 according to the present invention has to be separated from the liquid crystal panel 2 and left on the optical film group 52 and the plastic frame 53, so that the optical film is not broken.
  • the positional relationship between the sheets in the sheet group 52 ensures that the liquid crystal display 10 after reassembly can be used normally.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)

Abstract

提供一种液晶显示器（10）和用于其的双面胶带（3）。液晶显示器（10）包括：液晶面板（2）；背光单元（5），包括背板（51）、光学膜片组（52）和胶框（53）；双面胶带（3），包括涂布了第一胶黏剂并通过第一胶黏剂与液晶面板（2）相连的第一表面（3a），以及涂布了第二胶黏剂并通过第二胶黏剂分别与背板（51）和光学膜片组（52）相连的第二表面（3b）。其中，第一胶黏剂对液晶面板（2）的粘附强度低于第二胶黏剂对光学膜片组（52）的粘附强度。在背光单元（5）与液晶面板（2）分离后，液晶显示器（10）的双面胶带（3）能留在光学膜片组（52）和胶框（53）上，不会破坏光学膜片组（52）内膜片间的位置关系，保证重新组装后的液晶显示器（10）能够正常使用。

Description

一种液晶显示器和用于其的双面胶带
相关申请的交叉引用
本申请要求享有于2014年12月10日提交的名称为“一种液晶显示器和用于其的双面胶带”的中国专利申请CN201410751973.9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
本发明涉及一种液晶显示器和用于其的双面胶带。
背景技术
在当今社会中，液晶显示器已成为手机、电脑等电子产品以及相关机械设备必不可缺的重要组成，其可通过显示内容向人们传递某种信息，以便人们及时获知该信息。
如图1所示，现有的液晶显示器100主要包括液晶面板20和双面胶带30，以及通过双面胶带30粘附在液晶面板20上的背光单元50。该背光单元50包括背板501、胶框503和光学膜片组502。双面胶带30的一个表面与液晶面板20相连接，而另一个表面与胶框503和光学膜片组502相连接。
当检修液晶显示器100时，需要在液晶显示器100的一侧对液晶面板20和背光单元50分别施加两个向外作用力F1和F2，以使液晶面板20与背光单元50能够逐渐分开。在液晶面板20与背光单元50分离后，双面胶带30极有可能留在液晶面板20上，使得双面胶带30与光学膜片组502彼此脱离。但是，脱离光学膜片组502的双面胶带30会破坏光学膜片组502内膜片间的位置关系，使得光学膜片组502受到损伤，造成重新组装后的液晶显示器无法正常使用。
发明内容
为了解决上述问题，本发明的目的是提供一种液晶显示器，其能够避免双面胶带在背光单元与光学膜片组分离后留在液晶面板上，由此不会破坏光学膜片内 膜片间的位置关系，保证重新组装后的液晶显示器能够正常使用。
本发明提供了一种液晶显示器，其包括：液晶面板；背光单元，其包括背板和设在背板与液晶面板之间的光学膜片组，以及设在背板与液晶面板之间并围绕光学膜片组外的胶框；双面胶带，包括涂布了第一胶黏剂并通过第一胶黏剂与液晶面板相连的第一表面，以及涂布了第二胶黏剂并通过第二胶黏剂分别与背板和光学膜片组相连的第二表面。其中，第一胶黏剂对液晶面板的粘附强度低于第二胶黏剂对光学膜片组的粘附强度。
在一个实施例中，第一与第二胶黏剂内的粘结物质不同，第一胶黏剂内的粘结物质的黏度低于第二胶黏剂内的粘结物质的黏度，同时第一胶黏剂内的粘结物质的浓度低于或等于粘结物质的浓度。
在一个实施例中，第一与第二胶黏剂内的粘结物质相同，但第一胶黏剂内的粘结物质的浓度低于第二胶黏剂内的粘结物质的浓度。
在一个实施例中，光学膜片组包括从液晶面板朝背板的方向依次分布的扩散膜、增亮膜、扩散膜、导光板和反射膜。
在一个实施例中，液晶面板包括依次堆叠的偏光膜、彩膜基板、液晶层、阵列基板、偏光片、驱动电路和印刷电路板。
在一个实施例中，第一和第二胶黏剂均为亚克力胶。
本发明还提供了一种用于液晶显示器的双面胶带，其包括涂布了第一胶黏剂并可以通过第一胶黏剂与液晶显示器的液晶面板相连的第一表面，以及涂布了第二胶黏剂并可以通过第二胶黏剂分别与液晶显示器的背板和光学膜片组相连的第二表面。其中，第一胶黏剂对液晶面板的粘附强度低于第二胶黏剂对光学膜片组的粘附强度。
在一个实施例中，第一与第二胶黏剂内的粘结物质不同，第一胶黏剂内的粘结物质的黏度低于第二胶黏剂内的粘结物质的黏度，第一胶黏剂内的粘结物质的浓度低于或等于粘结物质的浓度。
在一个实施例中，第一与第二胶黏剂内的粘结物质相同，但第一胶黏剂内的粘结物质的浓度低于第二胶黏剂内的粘结物质的浓度。
在一个实施例中，第一和第二胶黏剂均为亚克力胶。
在背光单元与液晶面板分离后，本发明的液晶显示器的双面胶带不得不与液晶面板分离并留在光学膜片和胶框上，从而不会破坏光学膜片组内膜片间的位置 关系，保证重新组装后的液晶显示器能够正常使用。
另外，根据本发明的液晶显示器的结构简单，加工方便，装配容易，使用安全，便于实施推广应用。
附图说明
在下文中将基于实施例并参考附图来对本发明进行更详细的描述。其中：
图1是现有技术的液晶面板的结构示意图。
图2是根据本发明的液晶显示器的结构示意图。
在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例绘制。
具体实施方式
下面将结合附图对本发明作进一步说明。
图2显示了根据本发明的液晶显示器10。该液晶显示器10可应用在手机和电脑等电子产品以及相关的机械设备中，并通过显示内容向人们传递某种信息，以便人们及时获知该信息。
如图2所示，该液晶显示器10包括矩形的液晶面板2和框式的双面胶带3，以及通过双面胶带3与液晶面板2相连的背光单元5。背光单元5能够向液晶面板2提供光源，以确保液晶面板2能够清晰地显示画面。
该液晶面板2可选为TFT-LCD液晶面板(即薄膜晶体管液晶显示器的液晶面板)，其包括从上至下方向(即A方向)依次布置的偏光膜21、彩膜基板22(另称对向电极基板)、液晶层、阵列基板23、偏光片24、驱动电路和印刷电路板。其中，所述的驱动电路、液晶层、彩膜基板22和阵列基板23和印刷电路板都属于本领域技术人员熟知的，在此不再赘述。
背光单元5可包括背板51和设在背板51与液晶面板2之间的光学膜片组52，以及设在背板51与液晶面板2之间并围绕在光学膜片组52组外的胶框53。光学膜片组52包括从液晶面板2朝背板51的方向(即A方向)依次分布的扩散膜521、增亮膜522、扩散膜523、导光板524和反射膜525。背光单元5还包括设置在导光片524与胶框53之间的灯源。其中，所述的灯源可选为能够调节亮度的LED灯，以便调整液晶显示器10的亮度。除此之外，该光学膜片组52也有其他形式的结构，例如添加或删减相应膜片后形成的结构。
根据本发明，双面胶带3由基材和胶黏剂组成。基材可由纸、布或塑料薄膜形成，而胶黏剂可为环保型的胶黏剂，例如亚克力胶(即含有丙烯酸类和甲基丙烯酸类的胶)。其中，基材具有第一表面3a和与其相反的第二表面3b。胶黏剂包括涂布在第一表面3a上的第一胶黏剂，以及涂布在第二表面3b上的第二胶黏剂。双面胶带3的第一表面3a通过第一胶黏剂与液晶面板2相连接，而第二表面3b通过第二胶黏剂分别与背板51和光学膜片组52的扩散膜521相连接。通过双面胶带3能够把液晶面板2和背光单元5牢固地固定在一起。
为了防止双面胶带3在液晶面板2与光学膜片组52分离后留在液晶面板2上，第一胶黏剂对液晶面板2的粘附强度需要低于第二胶黏剂对光学膜片组52的粘附强度。由于同样的第二胶黏剂对玻璃材质光学膜片组52的粘附强度要低于对橡胶材质胶框53的粘附强度，而且第一胶黏剂对液晶面板2的粘附强度需要低于第二胶黏剂对光学膜片组52的粘附强度，因此第一胶黏剂对液晶面板2的粘附强度既低于第二胶黏剂对光学膜片组52的粘附强度又低于第二胶黏剂对胶框53的粘附强度。其中，所述的粘附强度实际上是单位面积内的粘附力，粘附力等于粘附强度乘以粘附处的接触面积。
如图2所示，在液晶显示器10的一侧对液晶面板2和背光单元5分别施加两个向外的作用力F3和F4时，由于第一胶黏剂对液晶面板2的粘附强度既低于第二胶黏剂对光学膜片组52的粘附强度又低于第二胶黏剂对胶框53的粘附强度，使得双面胶带3不得不与液晶面板2分离并留在光学膜片组52和胶框53上，由此可以避免光学膜片组52的结构受到损伤，保证重新组装后的液晶显示器10能够正常应用。
为了实现第一胶黏剂对液晶面板2的粘附强度低于第二胶黏剂对光学膜片组52上的粘附强度，以下提供两种实施例方式。
在第一种实施方式中，第一与第二胶黏剂内的粘结物质不同，第一胶黏剂内的粘结物质的黏度低于第二胶黏剂内的粘结物质的黏度，同时第一胶黏剂内的粘结物质的浓度低于或等于粘结物质的浓度。通过这种方式能够有效地降低第一表面3a与液晶面板2之间的粘附强度，确保双面胶带3能够与液晶面板2顺利分离，从而留在胶框53和光学膜片组52上。其中，所述粘结物质也称黏料，它是胶黏剂中的基本组分，起黏结作用。
在第二种实施方式中，第一与第二胶黏剂内的粘结物质相同，但第一胶黏剂 内的粘结物质的浓度低于第二胶黏剂内的粘结物质的浓度。通过这种方式能够有效地降低第一表面3a与液晶面板2之间的粘附强度，确保双面胶带3能够与液晶面板2顺利分离，从而留在胶框53和光学膜片组52上。
在一个优选的实施例中，背板51包括底部51a和固定连接在底部51a边缘处的侧部51b。侧部51b环绕在胶框53外，起定位胶框53的作用，并且能够保证胶框53不易变形。另外，双面胶带3的第二表面3b还可以与侧部51b的顶端相粘接，以增强背光单元5内的胶框53的稳定性。
在背光单元5与液晶面板2分离后，根据本发明的液晶显示器10的双面胶带3不得不与液晶面板2分离并留在光学膜片组52和胶框53上，从而不会破坏光学膜片组52内膜片间的位置关系，保证重新组装后的液晶显示器10能够正常使用。
虽然已经参考优选实施例对本发明进行了描述，但在不脱离本发明的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本发明并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (12)

  1. 一种液晶显示器，其中，包括：
    液晶面板；
    背光单元，其包括背板和设在所述背板与液晶面板之间的光学膜片组，以及设在所述背板与液晶面板之间并围绕所述光学膜片组外的胶框；以及
    双面胶带，其包括涂布了第一胶黏剂并通过所述第一胶黏剂与所述液晶面板相连接的第一表面，以及涂布了第二胶黏剂并通过所述第二胶黏剂分别与所述背板和光学膜片组相连的第二表面；
    其中，所述第一胶黏剂对所述液晶面板的粘附强度低于所述第二胶黏剂对所述光学膜片组的粘附强度。
  2. 根据权利要求1所述的液晶显示器，其中，所述第一与第二胶黏剂内的粘结物质不同，所述第一胶黏剂内的粘结物质的黏度低于所述第二胶黏剂内的粘结物质的黏度，同时所述第一胶黏剂内的粘结物质的浓度低于或等于所述粘结物质的浓度。
  3. 根据权利要求2所述的液晶显示器，其中，所述光学膜片组包括从所述液晶面板朝所述背板的方向依次分布的扩散膜、增亮膜、扩散膜、导光板和反射膜。
  4. 根据权利要求3所述的液晶显示器，其中，所述液晶面板包括依次堆叠的偏光膜、彩膜基板、液晶层、阵列基板、偏光片、驱动电路和印刷电路板。
  5. 根据权利要求1所述的液晶显示器，其中，所述第一与第二胶黏剂内的粘结物质相同，但所述第一胶黏剂内的粘结物质的浓度低于所述第二胶黏剂内的粘结物质的浓度。
  6. 根据权利要求5所述的液晶显示器，其中，所述光学膜片组包括从所述液晶面板朝所述背板的方向依次分布的扩散膜、增亮膜、扩散膜、导光板和反射膜。
  7. 根据权利要求6所述的液晶显示器，其中，所述液晶面板包括依次堆叠的偏光膜、彩膜基板、液晶层、阵列基板、偏光片、驱动电路和印刷电路板。
  8. 根据权利要求7所述的液晶显示器，其中，所述第一和第二胶黏剂均为亚克力胶。
  9. 一种用于液晶显示器的双面胶带，其中，包括涂布了第一胶黏剂并可以通过所述第一胶黏剂与所述液晶显示器的液晶面板相连接的第一表面，以及涂布了 第二胶黏剂并可以通过所述第二胶黏剂分别与所述液晶显示器的背板和光学膜片组相连的第二表面，其中，所述第一胶黏剂对所述液晶面板的粘附强度低于所述第二胶黏剂对所述光学膜片组的粘附强度。
  10. 根据权利要求9所述的双面胶带，其中，所述第一与第二胶黏剂内的粘结物质不同，所述第一胶黏剂内的粘结物质的黏度低于所述第二胶黏剂内的粘结物质的黏度，同时所述第一胶黏剂内的粘结物质的浓度低于或等于所述粘结物质的浓度。
  11. 根据权利要求9所述的双面胶带，其中，所述第一与第二胶黏剂内的粘结物质相同，但所述第一胶黏剂内的粘结物质的浓度低于所述第二胶黏剂内的粘结物质的浓度。
  12. 根据权利要求11所述的双面胶带，其中，所述第一和第二胶黏剂均为亚克力胶。
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CN102956154A (zh) * 2012-11-29 2013-03-06 深圳市华星光电技术有限公司 一种显示装置

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