WO2018040410A1 - 一种超薄型液晶显示器及其制作方法 - Google Patents

一种超薄型液晶显示器及其制作方法 Download PDF

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Publication number
WO2018040410A1
WO2018040410A1 PCT/CN2016/111772 CN2016111772W WO2018040410A1 WO 2018040410 A1 WO2018040410 A1 WO 2018040410A1 CN 2016111772 W CN2016111772 W CN 2016111772W WO 2018040410 A1 WO2018040410 A1 WO 2018040410A1
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Prior art keywords
liquid crystal
substrate
crystal display
ultra
ultrathin
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English (en)
French (fr)
Inventor
陈珍霞
陈黎暄
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US15/326,236 priority Critical patent/US20180335656A1/en
Publication of WO2018040410A1 publication Critical patent/WO2018040410A1/zh
Anticipated expiration legal-status Critical
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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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133302—Rigid substrates, e.g. inorganic substrates
    • 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

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to an ultra-thin liquid crystal display and a manufacturing method thereof.
  • a liquid crystal display includes an outer frame, a liquid crystal panel, and a backlight module.
  • the liquid crystal panel is composed of a color filter (CF), a thin film transistor array substrate (TFT array substrate), and a liquid crystal (LC) filled in between the two substrates.
  • Transparent electrodes are provided on opposite sides of the CF and TFT substrates.
  • the liquid crystal display controls the orientation of the liquid crystal molecules by the electric field, changes the polarization state of the light, and realizes the penetration and blocking of the optical path by the polarized light passing through the polarizer, thereby achieving the purpose of display.
  • a conventional liquid crystal display shown in FIG. 1) includes a liquid crystal panel and a module backlight 1.
  • the liquid crystal panel mainly includes an upper substrate 5 (having a thickness of 0.5-0.7 mm), a lower substrate 3 (having a thickness of 0.5-0.7 mm), and an upper polarizer 6 (having a thickness of 0.2 mm) attached to the upper surface of the upper substrate 5.
  • the lower polarizer 2 (having a thickness of 0.2 mm) attached to the lower surface of the lower substrate 3 and the liquid crystal layer 4 sandwiched between the upper substrate 5 and the lower substrate 3 (the thickness is very thin, negligible in the overall thickness).
  • Such a structure makes the entire liquid crystal display very thick and has a thickness of 11.4-21.8 mm.
  • liquid crystal displays have been widely used as display screens for electronic devices in various electronic products.
  • the market is increasingly pursuing high-brightness, low-power consumption, and thinning of electronic devices.
  • today's notebook computers, mobile phones, tablet computers, and other electronic devices that require liquid crystal displays are becoming thinner and brighter, and at the same time, they have low power consumption.
  • Liquid crystal displays also need to be thinner and thinner, and higher transmittance to achieve high brightness with low consumption.
  • transmittance since the liquid crystal panel itself does not emit light, it is required to provide a light source by the backlight module. Since the transmittance of the LCD is low, most of the backlight is wasted, resulting in low utilization of light by the LCD.
  • Low LCD transmittance comes from a variety of factors, including polarizers, CFs, and electrodes. They have a occlusion and absorption effect on light, especially polarizers and CF. Their penetration rates are only 42% and 30%, respectively. The main reason for the low LCD penetration rate. In terms of thinning, in the entire liquid crystal display, the thickness of the backlight module occupies more than half of the thickness of the entire liquid crystal display, so the backlight module directly determines whether the liquid crystal display can be thinned. Therefore, there is a need to solve the thinned backlight method to make the liquid crystal display thin.
  • the present invention is directed to solving the technical problems of low transmittance and large thickness of a liquid crystal display (LCD) in the prior art.
  • LCD liquid crystal display
  • the present invention provides an ultra-thin liquid crystal display and a method of fabricating the same.
  • the method for fabricating the ultrathin liquid crystal display provided by the present invention polymer-dispersed liquid crystal (PDLC) can be used to realize a non-polarizing sheet and improve the transmittance.
  • PDLC polymer-dispersed liquid crystal
  • a certain substrate in the liquid crystal display structure is made into a light guide plate, thereby realizing a backlight function, thereby replacing the traditional independent backlight module, thereby realizing ultra-thinness of the liquid crystal display.
  • the ultra-thin liquid crystal display produced by the method of the present invention has a thickness of 1.02-3.3 mm, and the thickness is greatly reduced as compared with the conventional liquid crystal display.
  • an ultrathin liquid crystal display comprising a liquid crystal cell, the liquid crystal cell including a first substrate, a second substrate disposed opposite the first substrate, and a liquid crystal layer between the first substrate and the second substrate;
  • the liquid crystal layer is a polymer dispersed liquid crystal structure, the polymer dispersed liquid crystal structure comprising a polymer layer and liquid crystal droplets dispersed in the polymer layer;
  • the back surface of the first substrate or the second substrate in the liquid crystal cell is provided with a dot; the ultra-thin liquid crystal display further includes an LED light bar disposed on a side of the substrate containing the dot.
  • the liquid crystal droplets are ellipsoidal.
  • the liquid crystal droplets have a size of from 10 to 1000 nm.
  • the liquid crystal layer is obtained by polymerization of a mixture of a polymerizable monomer and liquid crystal molecules by UV (Ultra Violet) irradiation, heating or cationic curing.
  • the content of the polymerizable monomer is from 10% by weight to 60% by weight based on the weight of the mixture.
  • the polymerizable monomer comprises acrylic acid, acrylate and its derivatives, methacrylate and its derivatives, styrene and its derivatives, epoxy resin and fatty amine epoxy curing agent. One or more.
  • the substrate containing the dots is a non-glass substrate.
  • the ultrathin liquid crystal display has a thickness of 1.02-3.3 mm.
  • a mixture of a polymerizable monomer and liquid crystal molecules is disposed between the first substrate and the second substrate; the content of the polymerizable monomer is 10% by weight to 60% by weight based on the weight of the mixture;
  • the polymerizable monomer comprises acrylic acid, acrylate and its derivatives, methacrylate and its derivatives, styrene and its derivatives, epoxy resin and fatty amine epoxy.
  • the curing agents One or more of the curing agents.
  • the UV irradiation is performed in a temperature range of -30 ° C to 120 ° C; the heating is performed by oven, ultrasonic or infrared heating.
  • the liquid crystal droplets are ellipsoidal.
  • liquid crystal droplets have a size of from 10 to 1000 nm.
  • the substrate containing dots is a non-glass substrate.
  • the ultrathin liquid crystal display has a thickness of 1.02-3.3 mm.
  • the ultra-thin liquid crystal display provided by the invention adopts polymer dispersed liquid crystal as the liquid crystal layer, can realize bright and dark display under the non-polarizing sheet, and forms a light guide plate in a display, instead of the traditional independent backlight module.
  • the thickness of the ultra-thin liquid crystal display is 1.02-3.3 mm. Compared with the traditional liquid crystal display, the thickness is reduced by 10-20mm.
  • the ultra-thin liquid crystal display provided by the invention has a simple manufacturing method, and the obtained ultra-thin liquid crystal display not only realizes ultra-thinning, but also has high transmittance.
  • FIG. 1 is a schematic structural view of a conventional liquid crystal display
  • FIG. 2 is a schematic view showing the open structure of the ultrathin liquid crystal display of the present invention.
  • FIG. 3 is a schematic view showing the off state structure of the ultrathin liquid crystal display of the present invention.
  • FIG. 4 is a plan view showing a substrate 11 including dots 13 in the ultrathin liquid crystal display of the present invention.
  • Figure 5 is a side view showing the substrate 11 including the dots 13 in the ultrathin liquid crystal display of the present invention.
  • Fig. 6 is a flow chart showing the fabrication of the ultrathin liquid crystal display of the present invention.
  • the present invention is directed to solving the technical problems of low transmittance and large thickness of a liquid crystal display (LCD) in the prior art.
  • an embodiment of the present invention provides an ultra-thin liquid crystal display.
  • the ultrathin liquid crystal display includes a liquid crystal cell 100, and its structure is as shown in FIGS. 2 and 3.
  • the liquid crystal cell 100 includes a first substrate 11 , a second substrate 12 disposed opposite to the first substrate 11 , and a liquid crystal layer 200 disposed between the first substrate 11 and the second substrate 12 .
  • the liquid crystal layer 200 is a polymer dispersed liquid crystal structure including a polymer layer 21 and liquid crystal droplets 22 dispersed in the polymer layer 21.
  • the back surface (ie, the lower surface) of the first substrate 11 is provided with dots 13 .
  • the ultra-thin liquid crystal display further includes an LED strip 14 disposed on a side of the substrate 11 (ie, the first substrate) including the dots 13.
  • the present invention uses the substrate 11 including the dots 13 as a light guide plate, and the dots 13 disposed thereon are used to conduct the light emitted from the LED strips 14 disposed on the sides thereof, and uniformly introduce the light from the sides and uniformly.
  • the liquid crystal cell 100 is guided to realize the function of the backlight.
  • the dot 13 is produced in a similar manner to a conventional light guide plate by laser, etching, injection molding, and printing. As shown in FIG. 4 and FIG. 5, the design of the dots 13 is similar to that of the conventional light guide plate design, and different dot density and size are set according to the proximity of the LED strips for realizing light on the substrate 11 containing the dots 13.
  • the medium distribution is uniform and the light is uniformly guided to the liquid crystal cell 100.
  • liquid crystal droplets 22 are ellipsoidal.
  • the liquid crystal droplets 22 have a size of 10-1000 nm.
  • the liquid crystal layer 200 is obtained by polymerization of a mixture of a polymerizable monomer and liquid crystal molecules by UV irradiation, heating or cationic curing, and forms a high molecular weight solid state by polymerization. A substance with good transparency.
  • the polymerizable monomer is present in an amount of from 10% by weight to 60% by weight, based on the weight of the mixture.
  • the polymerizable monomer includes, but is not limited to, one of acrylic acid, acrylate and its derivatives, methacrylate and its derivatives, styrene and its derivatives, epoxy resin and fatty amine epoxy curing agent. Or their compositions.
  • a photoinitiator When a mixture of a polymerizable monomer and a liquid crystal molecule is irradiated with UV, a photoinitiator may be introduced in order to accelerate the efficiency of UV photopolymerization.
  • the photoinitiator is present in an amount of from 0.01% by weight to 3% by weight based on the weight of the mixture.
  • the photoinitiator includes, but is not limited to, one of benzil dimethyl ketal, benzophenone, and thioxanthone or a combination thereof.
  • the substrate 11 including the dots 13 is a non-glass substrate.
  • the substrate 11 ie, the first substrate
  • the substrate 11 including the dots 13 includes, but is not limited to, a polyimide (PI) substrate, a polyethylene terephthalate (PET) substrate. Or a polymethyl methacrylate (PMMA) substrate.
  • PI polyimide
  • PET polyethylene terephthalate
  • PMMA polymethyl methacrylate
  • the thickness of the first substrate 11 is 0.5-1.5 mm
  • the thickness of the second substrate 12 is 0.5-1.5 mm
  • the thickness of the liquid crystal layer 200 is 0.02-0.1 mm. Therefore, the ultra-thin type provided by the present invention
  • the thickness of the liquid crystal display is 1.02-3.3 mm.
  • the ultra-thin liquid crystal display when the ultra-thin liquid crystal display is in an open state (that is, a voltage is applied to the liquid crystal cell 100), the liquid crystals in the liquid crystal droplets 22 are uniformly arranged in the direction of the electric field by the action of the electric field, and the incident light remains mostly. The direction is emitted, and the panel is displayed as bright.
  • the ultra-thin liquid crystal display when the ultra-thin liquid crystal display is in an off state (ie, the voltage applied to the liquid crystal cell 100 is zero), the liquid crystal molecules in the liquid crystal cell 22 are randomly arranged, and the incident light is received by the liquid crystal cell 22 and the polymer layer.
  • an embodiment of the present invention further provides a method for fabricating an ultra-thin liquid crystal display. As shown in FIG. 6, the method mainly includes steps S1 - S4.
  • step S1 a first substrate 11 and a second substrate 12 disposed opposite to the first substrate 11 are provided, and black matrix electrodes are formed on the first substrate 11 and the second substrate 12 (not shown in the drawing) Out).
  • step S2 a mixture of a polymerizable monomer and liquid crystal molecules is disposed between the first substrate 11 and the second substrate 12.
  • the content of the polymerizable monomer is from 10% by weight to 60% by weight based on the weight of the mixture.
  • the polymerizable monomer is characterized in that a polymerization reaction can be carried out to form a high molecular weight solid, transparent material.
  • the polymerizable monomer includes, but is not limited to, one of acrylic acid, acrylate and its derivatives, methacrylate and its derivatives, styrene and its derivatives, epoxy resin and fatty amine epoxy curing agent. Or a combination of them.
  • step S3 the mixture is subjected to UV irradiation in a temperature range of -30 ° C to 120 ° C or by an oven, ultrasonic or infrared heating or cationic curing to polymerize the polymerizable monomer to form a polymer.
  • the layer 21 is separated from the liquid crystal droplets 22 dispersed in the polymer layer 21.
  • the polymer layer 21 and the liquid crystal droplets 22 dispersed in the polymer layer 21 constitute the liquid crystal layer 200.
  • the liquid crystal layer 200 and the first substrate 11 and the second substrate 12 constitute a liquid crystal cell 100.
  • the liquid crystal droplets 22 have an ellipsoidal shape.
  • the liquid crystal droplets 22 have a size of 10 to 1000 nm.
  • a photoinitiator When the mixture is irradiated with UV, a photoinitiator can be introduced in order to accelerate the rate of UV photopolymerization.
  • the photoinitiator is present in an amount of from 0.01% by weight to 3% by weight based on the weight of the mixture.
  • the photoinitiator includes, but is not limited to, one of benzil dimethyl ketal, benzophenone, and thioxanthone or a combination thereof.
  • step S4 a dot 13 is formed on the back surface (ie, the lower surface) of the first substrate 11, and then the LED strip 14 is combined on the side of the substrate 11 (ie, the first substrate) including the dots 13 to make the ultra-thin Liquid crystal display.
  • the substrate 11 including the dots 13 is a non-glass substrate.
  • the substrate 11 ie, the first substrate
  • the substrate 11 including the dots 13 includes, but is not limited to, a polyimide (PI) substrate, a polyethylene terephthalate (PET) substrate. Or a polymethyl methacrylate (PMMA) substrate.
  • PI polyimide
  • PET polyethylene terephthalate
  • PMMA polymethyl methacrylate
  • the thickness of the first substrate 11 is 0.5-1.5 mm
  • the thickness of the second substrate 12 is 0.5-1.5 mm
  • the thickness of the liquid crystal layer 200 is 0.02-0.1 mm. Therefore, the method provided by the present invention is manufactured.
  • the ultra-thin liquid crystal display has a thickness of 1.02-3.3 mm.
  • the ultra-thin liquid crystal display provided by the present invention uses a polymer dispersed liquid crystal as a liquid crystal layer, which can realize a bright and dark display under a polarizerless film, and a substrate in the display is made into a light guide plate instead of the traditional independent.
  • the backlight module makes the ultra-thin liquid crystal display 1.02-3.3mm thick, and the thickness is reduced by 10-20mm compared with the conventional liquid crystal display.
  • the ultra-thin liquid crystal display provided by the invention has a simple manufacturing method, and the obtained ultra-thin liquid crystal display not only realizes ultra-thinning, but also has high transmittance.
  • first substrate ie substrate with dots

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  • Optics & Photonics (AREA)
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  • Chemical & Material Sciences (AREA)
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Abstract

一种超薄型液晶显示器及其制作方法。采用聚合物分散液晶作为液晶层（200），能够实现无偏光片下的亮暗显示，且将显示器中某一基板制成导光板，替代了传统独立的背光模组，使得超薄液晶显示器的厚度为1.02-3.3mm，实现了高穿透率和超薄化。

Description

一种超薄型液晶显示器及其制作方法
本申请要求享有2016年8月30日提交的名称为“一种超薄型液晶显示器及其制作方法”的中国专利申请CN201610764679.0的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示器技术领域，具体涉及一种超薄型液晶显示器及其制作方法。
背景技术
液晶显示器(liquid crystal display，LCD)包括外框、液晶面板和背光模组。液晶面板由彩色滤光片(color filter，CF)、薄膜晶体阵列基板(thin film transistor array substrate，TFT array substrate)以及此两基板中间填充的液晶(liquid crystal，LC)组成。CF和TFT基板的相对内侧设有透明电极。液晶显示器通过电场对液晶分子的取向进行控制，改变光的偏振状态，并通过偏光片对通过的偏振光实现光路的穿透和阻拦，达到显示的目的。例如，传统的液晶显示器(如图1所示)包括液晶面板和模组背光1。其中，液晶面板主要包含上基板5(厚度为0.5-0.7mm)、下基板3(厚度为0.5-0.7mm)、贴附在上基板5上表面上的上偏光片6(厚度为0.2mm)、贴附在下基板3下表面上的下偏光片2(厚度为0.2mm)以及夹在上基板5和下基板3中间的液晶层4(厚度非常薄，在整体厚度中可以忽略不计)。这样的结构使得整个液晶显示器非常厚，其厚度为11.4-21.8mm。
目前，液晶显示器作为电子设备的显示屏已经广泛应用于各种电子产品中。市场越来越追求电子设备高亮度、低功耗、薄型化，例如现在的笔记本电脑、手机、平板电脑等需要液晶显示器的电子设备越做越薄、越亮，同时又要低功耗，因此，液晶显示器也需要越做越薄，以及更高的穿透率来达到低耗下的高亮度。首先在穿透率方面，由于液晶面板本身不发光，需要由背光模组提供光源，由于LCD的穿透率很低，所以大部分的背光都被浪费掉，导致LCD对光的利用很低。LCD穿透率低来自多个因素，包括偏光片、CF和电极等，它们对光有遮挡和吸收的作用，尤其是偏光片和CF，他们的穿透率分别只有42％和30％，是LCD穿透率低的主要原因。而在薄型化方面，在整个液晶显示器中，背光模块的厚度占据了整个液晶显示器一半以上的厚度，所以背光模块直接决定了液晶显示器是否可以薄型化。所以亟需解决薄化的背光源方法，以使液晶显示器实现薄型化。
发明内容
本发明旨在解决现有技术中的液晶显示器(LCD)存在的穿透率低和厚度大的技术问题。
为了解决上述技术问题，本发明提供了一种超薄型液晶显示器及其制作方法。本发明提供的超薄型液晶显示器的制作方法中采用聚合物分散液晶(PDLC)能够实现无偏光片，提高穿透率。同时将液晶显示器结构中的某一基板制成导光板，从而实现背光功能，以此替代传统独立的背光模组，实现液晶显示器的超薄化。本发明方法制作的超薄型液晶显示器的厚度为1.02-3.3mm，与传统液晶显示器相比，厚度大幅度减小。
根据本发明的第一个方面，提供了一种超薄型液晶显示器，其包括液晶盒，所述液晶盒包括第一基板、与所述第一基板相对设置的第二基板以及设于所述第一基板和第二基板之间的液晶层；所述液晶层为聚合物分散液晶结构，所述聚合物分散液晶结构包括聚合物层以及分散于所述聚合物层中的液晶滴；
所述液晶盒中的第一基板或第二基板的背面设有网点；所述超薄型液晶显示器还包括设于含有网点的基板侧面的LED灯条。
优选的是，所述液晶滴呈椭球状。
优选的是，所述液晶滴的尺寸为10-1000nm。
进一步优选的是，所述液晶层由可聚合单体与液晶分子的混合物经UV(Ultra Violet，紫外线)照射、加热或阳离子固化的方式发生聚合反应制得。
进一步优选的是，基于混合物的重量计，所述可聚合物单体的含量为10wt％-60wt％。
进一步优选的是，所述可聚合单体包括丙烯酸、丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂中的一种或多种。
进一步优选的是，所述含有网点的基板为非玻璃材质基板。
进一步优选的是，所述超薄型液晶显示器的厚度为1.02-3.3mm。
根据本发明的第二个方面，提供了一种超薄型液晶显示器的制作方法，其包括如下步骤：
S1，提供第一基板及与所述第一基板相对设置的第二基板，并在所述第一基板与第二基板上制作黑矩阵电极；
S2，在所述第一基板与第二基板之间设置可聚合单体与液晶分子的混合物；基于混合物的重量计，所述可聚合物单体的含量为10wt％-60wt％；
S3，对所述混合物进行UV照射、加热或阳离子固化，使所述可聚合单体发生聚合反应形成聚合物层与分散在所述聚合物层中的液晶滴；所述聚合物层与分散在所述聚合物层中的液晶滴构成液晶层，所述液晶层与第一基板和第二基板构成液晶盒；
S4，在所述第一基板或第二基板的背面制作网点，然后在含有网点的基板的侧面组合LED灯条制得所述超薄型液晶显示器。
优选的是，在步骤S2中，所述可聚合单体包括丙烯酸、丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂中的一种或多种。
优选的是，在步骤S3中，所述UV照射在-30℃至120℃的温度范围内进行；所述加热的方式为采用烘箱、超声或红外加热。
优选的是，所述液晶滴呈椭球状。
进一步优选的是，所述液晶滴的尺寸为10-1000nm。
进一步优选的是，在步骤S4中，所述含有网点的基板为非玻璃材质基板。
进一步优选的是，所述超薄型液晶显示器的厚度为1.02-3.3mm。
与现有技术相比，上述方案中的一个或多个实施例可以具有如下优点或有益效果：
本发明提供的超薄型液晶显示器采用聚合物分散液晶作为液晶层，能够实现无偏光片下的亮暗显示，且将显示器中某一基板制成导光板，替代了传统独立的背光模组，使得超薄液晶显示器的厚度为1.02-3.3mm。与传统的液晶显示器相比，厚度减少了10-20mm。本发明提供的超薄型液晶显示器的制作方法简单，制得的超薄型液晶显示器不仅实现了超薄化，同时其穿透率高。
本发明的其它特征和优点将在随后的说明书中阐述，并且部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例共同用于解释本发明，并不构成对本发明的限制。在附图中：
图1示出了传统液晶显示器的结构示意图；
图2示出了本发明的超薄型液晶显示器开态结构示意图；
图3示出了本发明的超薄型液晶显示器关态结构示意图；
图4示出了本发明的超薄型液晶显示器中含网点13的基板11的俯视图；
图5示出了本发明的超薄型液晶显示器中含网点13的基板11的侧视图；
图6示出了本发明的超薄型液晶显示器的制作流程图。
具体实施方式
以下将结合附图及实施例来详细说明本发明的实施方式，借此对本发明如何应用技术手段来解决技术问题，并达成技术效果的实现过程能充分理解并据以实施。需要说明的是，只要不构成冲突，本发明中的各个实施例以及各实施例中的各个特征可以相互结合，所形成的技术方案均在本发明的保护范围之内。
本发明旨在解决现有技术中的液晶显示器(LCD)存在的穿透率低和厚度大的技术问题。为了解决上述技术问题，本发明实施例提供了一种超薄型液晶显示器。
在本实施例中，超薄型液晶显示器包括液晶盒100，其结构如图2和图3所示。所述液晶盒100包括：第一基板11、与所述第一基板11相对设置的第二基板12以及设于所述第一基板11和第二基板12之间的液晶层200。所述液晶层200为聚合物分散液晶结构，所述聚合物分散液晶结构包括聚合物层21以及分散于所述聚合物层21中的液晶滴22。
如图4和图5所示，所述第一基板11的背面(即下表面)设有网点13。所述超薄型液晶显示器还包括设于含有网点13的基板11(即第一基板)侧面的LED灯条14。
值得注意的是，本发明将含有网点13的基板11用作导光板，其上面设置的网点13用于传导其侧边设置的LED灯条14发出的光线，将光线均匀从侧边导入并均匀导向液晶盒100中，从而实现背光的作用。网点13的制作方式与通常的导光板相类似，制作方式有激光、刻蚀、注塑和印刷等方法。如图4和图5所示，网点13的设计与通常的导光板设计相类似，根据靠近LED灯条的远近不同，设置不同的网点密度与大小，用于实现光线在含有网点13的基板11中均匀的分布并将光线均匀的导向液晶盒100。
在本发明一优选的实施例中，所述液晶滴22呈椭球状。
在本发明一优选的实施例中，所述液晶滴22的尺寸为10-1000nm。
在本发明一优选的实施例中，所述液晶层200由可聚合单体与液晶分子的混合物经UV照射、加热或阳离子固化的方式发生聚合反应制得，通过聚合反应形成高分子量的固态、透明性好的物质。
在本发明一优选的实施例中，基于混合物的重量计，所述可聚合物单体的含量为10wt％-60wt％。
所述可聚合单体包括但不限于丙烯酸、丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂中的一种或它们的组合物。
当采用UV照射可聚合单体与液晶分子的混合物时，为了加快UV光聚合效率，可引入光引发剂。基于混合物的重量计，所述光引发剂的含量为0.01wt％-3wt％。所述光引发剂包括但不限于苯偶酰二甲基缩酮、二苯甲酮和硫代蒽酮中的一种或它们的组合物。
所述含有网点13的基板11为非玻璃材质基板。
在本发明一优选的实施例中，所述含有网点13的基板11(即第一基板)包括但不限于聚酰亚胺(PI)基板、聚对苯二甲酸乙二醇酯(PET)基板或聚甲基丙烯酸甲酯(PMMA)基板。
所述第一基板11的厚度为0.5-1.5mm，所述第二基板12的厚度为0.5-1.5mm，所述液晶层200的厚度为0.02-0.1mm，因此，本发明提供的超薄型液晶显示器的厚度为1.02-3.3mm。
如图2所示，当超薄型液晶显示器处于开态(即在液晶盒100上施加电压)时，液晶滴22内的液晶受电场的作用沿电场方向统一排列，入射光线大部分依旧保持原来的方向射出，此时面板显示为亮态。如图3所示，当超薄型液晶显示器处于关态(即液晶盒100上施加的电压为零)时，液晶滴22内的液晶分子随机排列，入射的光线受液晶滴22和聚合物层21界面，液晶滴22内散乱排列的液晶分子等的折射、反射和散射等作用，原来准直入射的光线被改变散乱的漫反射状态，面板显示为暗态。如此，不需要偏光片即可实现不同亮暗态的显示。
相应地，本发明实施例还提供了一种超薄型液晶显示器的制作方法。如图6所示，该方法主要包括步骤S1-步骤S4。
在步骤S1中，提供第一基板11及与所述第一基板11相对设置的第二基板12，并在所述第一基板11与第二基板12上制作黑矩阵电极(附图中未示出)。
在步骤S2中，在所述第一基板11与第二基板12之间设置可聚合单体与液晶分子的混合物。基于混合物的重量计，所述可聚合物单体的含量为10wt％-60wt％。
所述可聚合单体的特征是可以发生聚合反应，形成高分子量的固态、透明性好的物质。所述可聚合单体包括但不限于丙烯酸、丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂中的一种或它们的组合。
在步骤S3中，对所述混合物采用在-30℃至120℃的温度范围内进行UV照射或采用烘箱、超声或红外加热或阳离子固化方式，使所述可聚合单体发生聚合反应形成聚合物层21与分散在所述聚合物层21中的液晶滴22。所述聚合物层21与分散在所述聚合物层21中的液晶滴22构成液晶层200。所述液晶层200与第一基板11和第二基板12构成液晶盒100。所述液晶滴22呈椭球状。所述液晶滴22的尺寸为10-1000nm。
当采用UV照射混合物时，为了加快UV光聚合速率，可引入光引发剂。基于混合物的重量计，所述光引发剂的含量为0.01wt％-3wt％。所述光引发剂包括但不限于苯偶酰二甲基缩酮、二苯甲酮和硫代蒽酮中的一种或它们的组合物。
在步骤S4中，在所述第一基板11的背面(即下表面)制作网点13，然后在含有网点13的基板11(即第一基板)的侧面组合LED灯条14制得所述超薄型液晶显示器。
所述含有网点13的基板11为非玻璃材质基板。
在本发明一优选的实施例中，所述含有网点13的基板11(即第一基板)包括但不限于聚酰亚胺(PI)基板、聚对苯二甲酸乙二醇酯(PET)基板或聚甲基丙烯酸甲酯(PMMA)基板。
所述第一基板11的厚度为0.5-1.5mm，所述第二基板12的厚度为0.5-1.5mm，所述液晶层200的厚度为0.02-0.1mm，因此，本发明提供的方法制作的超薄型液晶显示器的厚度为1.02-3.3mm。
综上所述，本发明提供的超薄型液晶显示器采用聚合物分散液晶作为液晶层，能够实现无偏光片下的亮暗显示，且将显示器中某一基板制成导光板，替代了传统独立的背光模组，使得超薄液晶显示器的厚度为1.02-3.3mm，与传统的液晶显示器相比，厚度减少了10-20mm。本发明提供的超薄型液晶显示器的制作方法简单，制得的超薄型液晶显示器不仅实现了超薄化，同时其穿透率高。
虽然本发明所公开的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所公开的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的保护范围，仍须以所附的权利要求书所界定的范围为准。
附图标记说明
1         模组背光
2         下偏光片
3         下基板
4         液晶层
5         上基板
6         上偏光片
100       液晶盒
11        第一基板(即含有网点的基板)
12        第二基板
13        网点
14        LED灯条
200       液晶层
21        聚合物层
22        液晶滴

Claims (15)

  1. 一种超薄型液晶显示器，其包括液晶盒，所述液晶盒包括第一基板、与所述第一基板相对设置的第二基板以及设于所述第一基板和第二基板之间的液晶层；所述液晶层为聚合物分散液晶结构，所述聚合物分散液晶结构包括聚合物层以及分散于所述聚合物层中的液晶滴；
    所述液晶盒中的第一基板或第二基板的背面设有网点；所述超薄型液晶显示器还包括设于含有网点的基板侧面的LED灯条。
  2. 根据权利要求1所述的超薄型液晶显示器，其中，所述液晶滴呈椭球状。
  3. 根据权利要求1所述的超薄型液晶显示器，其中，所述液晶滴的尺寸为10-1000nm。
  4. 根据权利要求1所述的超薄型液晶显示器，其中，所述液晶层由可聚合单体与液晶分子的混合物经UV照射、加热或阳离子固化的方式发生聚合反应制得。
  5. 根据权利要求4所述的超薄型液晶显示器，其中，基于混合物的重量计，所述可聚合物单体的含量为10wt％-60wt％。
  6. 根据权利要求5所述的超薄型液晶显示器，其中，所述可聚合单体包括丙烯酸、丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂中的一种或多种。
  7. 根据权利要求1所述的超薄型液晶显示器，其中，所述含有网点的基板为非玻璃材质基板。
  8. 根据权利要求1所述的超薄型液晶显示器，其中，所述超薄型液晶显示器的厚度为1.02-3.3mm。
  9. 一种超薄型液晶显示器的制作方法，其包括如下步骤：
    S1，提供第一基板及与所述第一基板相对设置的第二基板，并在所述第一基板与第二基板上制作黑矩阵电极；
    S2，在所述第一基板与第二基板之间设置可聚合单体与液晶分子的混合物；基于混合物的重量计，所述可聚合物单体的含量为10wt％-60wt％；
    S3，对所述混合物进行UV照射、加热或阳离子固化，使所述可聚合单体发生聚合反应形成聚合物层与分散在所述聚合物层中的液晶滴；所述聚合物层与分散在所述聚合物层中的液晶滴构成液晶层，所述液晶层与第一基板和第二基板构成液晶盒；
    S4，在所述第一基板或第二基板的背面制作网点，然后在含有网点的基板的侧面组合LED灯条制得所述超薄型液晶显示器。
  10. 根据权利要求9所述的制作方法，其中，在步骤S2中，所述可聚合单体包括丙烯 酸、丙烯酸酯及其衍生物、甲基丙烯酸酯及其衍生物、苯乙烯及其衍生物、环氧树脂与脂肪胺类环氧固化剂中的一种或多种。
  11. 根据权利要求9所述的制作方法，其中，在步骤S3中，所述UV照射在-30℃至120℃的温度范围内进行；所述加热的方式为采用烘箱、超声或红外加热。
  12. 根据权利要求9所述的制作方法，其中，在步骤S3中，所述液晶滴呈椭球状。
  13. 根据权利要求9所述的制作方法，其中，在步骤S3中，所述液晶滴的尺寸为10-1000nm。
  14. 根据权利要求9所述的制作方法，其中，在步骤S4中，所述含有网点的基板为非玻璃材质基板。
  15. 根据权利要求9所述的制作方法，其中，在步骤S4中，所述超薄型液晶显示器的厚度为1.02-3.3mm。
PCT/CN2016/111772 2016-08-30 2016-12-23 一种超薄型液晶显示器及其制作方法 Ceased WO2018040410A1 (zh)

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