WO2014187050A1 - Pdlc液晶面板的制备方法 - Google Patents

Pdlc液晶面板的制备方法 Download PDF

Info

Publication number
WO2014187050A1
WO2014187050A1 PCT/CN2013/083595 CN2013083595W WO2014187050A1 WO 2014187050 A1 WO2014187050 A1 WO 2014187050A1 CN 2013083595 W CN2013083595 W CN 2013083595W WO 2014187050 A1 WO2014187050 A1 WO 2014187050A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
light
crystal cell
preparation
mixture
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2013/083595
Other languages
English (en)
French (fr)
Inventor
李明超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Original Assignee
BOE Technology Group Co Ltd
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.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to US14/370,128 priority Critical patent/US9557609B2/en
Publication of WO2014187050A1 publication Critical patent/WO2014187050A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G02F1/1341—Filling or closing 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
    • 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

Definitions

  • Embodiments of the present invention relate to a method of fabricating a PDLC liquid crystal panel. Background technique
  • Polymer Dispersed Liquid Crystal is a method in which a low molecular liquid crystal is mixed with a prepolymer, and a micron-sized liquid crystal droplet is uniformly dispersed in a polymer network under polymerization under certain conditions.
  • a material having electro-optical response characteristics is obtained by using dielectric anisotropy of liquid crystal molecules.
  • the PDLC mainly works between the scattering state and the transparent state and has a certain gray scale.
  • the PDLC display has many advantages, such as a polarizing plate and a directional layer, a process cartridge, and a large-area flexible display.
  • PDLC has been widely used in optical modulators, thermal and pressure sensitive devices, electronically controlled glass, light valves, projection displays, and e-books.
  • a conventional method of fabricating a PDLC liquid crystal panel is as follows. First, the liquid crystal is mixed with the prepolymer, and the mixed mixture is filled between the array substrate and the color filter substrate which are oppositely disposed to constitute the liquid crystal cell; then, the liquid crystal cell filled with the mixture is irradiated with light, and the mixture in the liquid crystal cell Polymerization occurs under the action of light to form a high molecular polymer.
  • the polymer polymer forms a spatial skeleton structure under light irradiation, and forms a groove structure between the skeleton and the skeleton; when the liquid crystal moves toward the groove portion, a dispersion system is formed to disperse the liquid crystal in the polymer network, thereby A PDLC liquid crystal panel is available. Summary of the invention
  • Embodiments of the present invention provide a method for preparing a PDLC liquid crystal panel, so that the prepared
  • the brightness of the PDLC liquid crystal panel is more uniform.
  • An aspect of the invention provides a method for preparing a PDLC liquid crystal panel, comprising: mixing liquid crystal molecules, a photoinitiator, and a prepolymer to obtain a liquid crystal mixture; injecting the obtained liquid crystal mixture into a liquid crystal empty cell to form a liquid crystal cell; The liquid crystal cell is irradiated with light and uniform alternating light, and the liquid crystal mixture in the liquid crystal cell is polymerized to obtain a PDLC liquid crystal panel.
  • the liquid crystal mixture is uniformly mixed by a liquid crystal molecule, a photoinitiator, and a prepolymer in a mass ratio (79 ⁇ 5 ) %: (1 ⁇ 0.05 ) %: (20 ⁇ 5 ) %.
  • illuminating the liquid crystal cell by uniformly alternating light with strong and weak may include: placing a mask above the liquid crystal cell, and providing a pattern with uniform transparency in the mask; and illuminating the mask with light After passing through the mask, light rays uniformly and alternately are formed; the liquid crystal cell is irradiated by uniformly alternating light formed by the strength.
  • illuminating the liquid crystal cell with uniform alternating light of strong and weak further comprises: outputting light through the laser; and irradiating the light output from the laser onto the beam expander for beam expansion.
  • the illuminating the liquid crystal cell by using the light and the uniform alternating light may further comprise: separating the light into the strong and weak evenly and uniformly by using the light-emitting beam splitting prism. The light portion and the reflected light portion are formed to form a strong and weakly alternating light; and the liquid crystal cell is irradiated with uniformly alternating light formed by the strength.
  • illuminating the liquid crystal cell with the light of the alternating strong and weak hooks may further include: outputting light through the laser; and irradiating the light output by the laser to the beam expander. Expand the beam.
  • the polymerization reaction of the liquid crystal mixture in the liquid crystal cell may be: the liquid crystal mixture in the liquid crystal cell irradiated by the strong light first starts to undergo polymerization to form a polymer skeleton; the liquid crystal cell irradiated by the weak light The polymerization of the liquid crystal mixture in the interior begins to form a groove between the polymer skeletons.
  • the light illuminating the liquid crystal cell may be ultraviolet light.
  • the injecting the obtained liquid crystal mixture into the liquid crystal empty box may be: injecting the obtained liquid crystal mixture into the liquid crystal empty box by vacuum infusion.
  • FIG. 1 is a schematic diagram of a method for fabricating a PDLC liquid crystal panel according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a method for fabricating a PDLC liquid crystal panel according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of a method for fabricating a PDLC liquid crystal panel according to Embodiment 2 of the present invention.
  • the inventors found that in the process of curing the mixture, the problem of uneven distribution of the polymer is inevitable, that is, the polymer skeleton is unevenly distributed and the groove distribution between the polymer skeletons is uneven. As a result, the brightness of the PDLC liquid crystal panel is uneven, which affects the overall display effect of the liquid crystal panel.
  • the grooves between the polymer skeletons are groove-like (height and uneven) topography, including void shapes.
  • FIG. 1 is a schematic diagram of a method for fabricating a PDLC liquid crystal panel according to an embodiment of the present invention. As shown in FIG. 1, the method for preparing the PDLC liquid crystal panel includes:
  • Step 1 mixing the liquid crystal molecules, the photoinitiator and the prepolymer to obtain a liquid crystal mixture; Step 2, injecting the obtained liquid crystal mixture into a liquid crystal empty box to form a liquid crystal cell; Step 3, using uniform light irradiation with strong and weak
  • the liquid crystal cell is obtained by polymerizing a liquid crystal mixture in the liquid crystal cell to obtain a PDLC liquid crystal panel.
  • a portion irradiated by strong light forms a polymer skeleton (ie, a polymer skeleton) due to polymerization of the prepolymer, and low light.
  • the (low intensity light) illuminating portion forms a groove between the polymer skeletons.
  • the uniform distribution of the skeleton and the groove in the liquid crystal cell allows the liquid crystal molecules to be uniformly distributed in the groove, thereby forming a uniformly distributed polymer system.
  • the light rays uniformly alternating with each other make the portion where the light intensity is high and the portion having the low intensity uniformly alternate with each other in the light-irradiated region in one plane.
  • the process of controlling the PDLC in the embodiment of the present invention can uniformly distribute the liquid crystal molecules in the polymer material, so that the embodiment of the present invention improves the uneven brightness of the PDLC liquid crystal panel compared with the conventional preparation method, thereby Improve the overall quality of the PDLC LCD panel.
  • the preparation method of the PDLC liquid crystal panel described in Embodiment 1 includes the following steps. Step 201, mixing liquid crystal molecules, a photoinitiator and a prepolymer to obtain a liquid crystal mixture 21.
  • the liquid crystal mixture is composed of liquid crystal molecules, photoinitiators, and prepolymers by mass percentage.
  • the liquid crystal molecules, the photoinitiator and the prepolymer may have a ratio of 79: 1: 20 in mass ratio.
  • the prepolymer may be a monofunctional TMPTA (trimethylolpropane triacrylate), IBMA (isobutyl methacrylate), IBOA (isobornyl (meth)acrylate), or the like, or may have a double Functional groups such as BDDA (1,3-butanediol diacrylate), DPGDA (dipropylene glycol diacrylate), PEGDA (polyethylene glycol diacrylate), and the like.
  • TMPTA trimethylolpropane triacrylate
  • IBMA isobutyl methacrylate
  • IBOA isobornyl (meth)acrylate
  • BDDA 1,3-butanediol diacrylate
  • DPGDA dipropylene glycol diacrylate
  • PEGDA polyethylene glycol diacrylate
  • I hair agent also known as photosensitizer or photocuring agent
  • photosensitizer or photocuring agent is a type of energy that absorbs a certain wavelength in the ultraviolet (250 ⁇ 420nm) or visible (400 ⁇ 800nm) region.
  • a radical, a cation, or the like thereby initiating a compound in which the monomer is polymerized and crosslinked and cured.
  • the photoinitiator can be, for example, the Irgacure series 650-659, or the DP series 1030, 3100, 5000, 5100, 5120, and the like.
  • a liquid crystal molecule is a molecule containing a rigid structure (RS) flexible structure (FS) and an electron-dipping group (EG).
  • RS rigid structure
  • FS flexible structure
  • EG electron-dipping group
  • a rigid structure RS can be:
  • the flexible group (FS ) may be -C n H 2n+1 (n is an integer); -0 C n H 2n+1 (n is an integer), etc.;
  • an electron withdrawing group is a group having a large electronegativity, such as -CN; -X (X is a halogen element) and the like.
  • the liquid crystal molecules to which the present invention relates may, for example, be M series 11-1560, 11-1159, etc.; C series 5220, 5221; 5213; etc.; S series 069015 and the like.
  • Step 202 injecting the obtained liquid crystal mixture into the liquid crystal empty cell 22 to form a liquid crystal cell 23.
  • the liquid crystal empty box is formed by the array plate and the opposite substrate (for example, the color filter substrate) being sealed and sealed by the sealant, and liquid crystal is injected into the liquid crystal cell to form a liquid crystal cell.
  • the liquid crystal mixture is injected into the liquid crystal empty box by vacuum infusion to obtain a liquid crystal cell, and the vacuum infusion process can make the liquid crystal mixture penetrate better into the edge region of the liquid crystal empty box, thereby reducing bubble generation and improving.
  • the filling effect can shorten the process and increase production efficiency.
  • the meaning of injecting the obtained liquid crystal mixture into the liquid crystal empty box to form the liquid crystal cell is not limited to first injecting the array substrate and the color filter substrate into the liquid crystal, and then injecting the liquid crystal on the array substrate. After the glue is dropped into the sealant, the array substrate and the color filter substrate are aligned.
  • Step 203 placing a mask 24 above the liquid crystal cell, and the mask 24 is provided with a pattern of uniform transparency.
  • the pattern provided on the mask 24 may be formed by uniformly alternating portions of completely transparent portions, completely opaque portions or translucent portions (i.e., having a certain gray scale), so that uniform transparency may be formed.
  • Step 204 outputting light through a laser.
  • the laser in this step can be an Nd:YAG laser ( ⁇ : 4 aluminum garnet laser). Excellent light quality can be obtained by outputting light using a Nd:YAG laser. Furthermore, the Nd:YAG laser uses a laser diode (LD) as a pump source, which is small in size, light in weight, high in efficiency, long in life, and does not require a cooling system, which provides favorable conditions for miniaturization of the laser system.
  • LD laser diode
  • Step 205 The light output by the laser is irradiated onto the beam expander to expand the beam.
  • the beam expander used also has a spatial filtering function, which is capable of absorbing light of other wavelength ranges and transmitting only ultraviolet light having a wavelength of 254 nm, so that the light illuminating the liquid crystal cell is ultraviolet light.
  • the prepolymer in the liquid crystal mixture injected into the above liquid crystal cell can be polymerized under irradiation of ultraviolet light to form a high molecular polymer.
  • a laser capable of emitting only ultraviolet light can also be used in step 204.
  • Step 206 illuminating the liquid crystal cell with the uniformly alternating light formed by the strength.
  • the portion of the liquid crystal mixture in the liquid crystal cell that is irradiated with the strong light first starts to undergo polymerization to form a skeleton of the polymer, and the portion irradiated by the weak light starts to undergo polymerization.
  • Forming a groove between the polymer skeletons, with the continuous progress of the polymerization reaction the liquid crystal mixture at the region where the polymerization reaction first starts to occur in the liquid crystal cell is first solidified, and the prepolymer at the region where the polymerization reaction starts to occur is already present.
  • the groove in which the solidified region moves the liquid crystal molecules can be uniformly distributed in the grooves between the skeletons, thus forming a uniformly distributed polymer system.
  • steps 204 and 205 may be performed first, and then step 203 is performed.
  • a liquid crystal capable of emitting ultraviolet light can be directly used to directly illuminate a liquid crystal cell infused with a liquid crystal mixture.
  • the above-described Embodiment 1 Since the mask is irradiated with ultraviolet light in the above-described Embodiment 1, the above-described Embodiment 1 The method described can be referred to as the ultraviolet mask method.
  • the preparation method of another PDLC liquid crystal panel described in Embodiment 2 includes: Step 301: mixing liquid crystal molecules, a photoinitiator and a prepolymer to obtain a liquid crystal mixture. Step 302, injecting the obtained liquid crystal mixture into a liquid crystal empty cell to form a liquid crystal cell 34. Step 303, the light is output through the laser 31.
  • step 304 the light output from the laser is irradiated onto the beam expander 32 for beam expansion.
  • steps 301 to 304 in this embodiment are the same as steps 201 to 204 in the above embodiment 1, even if there are slight differences between the embodiment 1 and the embodiment 2, the field The skilled person can also reasonably introduce according to the relevant knowledge in the field, and therefore will not be described in detail.
  • the differences between the second embodiment and the above-described first embodiment will be mainly described below.
  • Step 305 the light is irradiated to the beam splitting prism 33 to divide the light into the light transmitting portion and the reflected light portion which are uniformly and evenly distributed to form a strong and weak alternating light.
  • two beams of light having a certain light intensity ratio are transmitted and reflected. That is, the light is divided into two light beams that are relatively light-transmitting and have weak reflected light; or the light is split into two light beams that are relatively light-transmissive and have a strong reflected light, one of which directly illuminates the surface of the liquid crystal cell, and the other A beam of light is irradiated onto the surface of the liquid crystal cell by the reflection of the mirror 35, so that the surface of the liquid crystal cell obtains strong and weak light which is alternately distributed by the light-transmitting portion and the reflected light portion, and finally forms a strong and weak uniformity. Alternating light.
  • Step 306 illuminating the liquid crystal cell 34 with light uniformly alternating with the intensity formed after the splitting.
  • the portion of the liquid crystal mixture in the liquid crystal cell that is irradiated with the strong light first starts to undergo polymerization to form a skeleton of the polymer, and the portion irradiated by the weak light starts.
  • the polymerization reaction occurs to form a groove between the polymer skeletons, and as the polymerization progresses, the liquid crystal mixture at the region where the polymerization starts first occurs in the liquid crystal cell.
  • the liquid crystal molecules can be evenly distributed in the grooves between the skeletons, thus forming a polymer system in which the hooks are distributed. Since the holographic exposure experimental light path is used in the above-described Embodiment 2, the method described in the above Embodiment 2 can be referred to as a holographic exposure method.
  • the portion irradiated by the strong light forms a polymer skeleton due to polymerization of the prepolymer (ie, a polymer) Skeleton)
  • the part irradiated by the weak light forms a groove between the polymer skeletons
  • the skeleton and the groove are evenly distributed so that the liquid crystal molecules are uniformly distributed in the groove, thereby forming a uniformly distributed polymer system
  • the PDLC fabrication process can be controlled to make the liquid crystal The molecules are evenly distributed in the polymer material.
  • the embodiment of the invention mainly improves the problem of uneven brightness of the PDLC liquid crystal panel, thereby improving the overall quality of the PDLC liquid crystal panel.

Landscapes

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

Abstract

一种PDLC液晶面板的制备方法包括：将液晶分子、光引发剂和预聚物混合均匀得到液晶混合物；将得到的液晶混合物注入到液晶空盒（22）中形成液晶盒（23）；利用强弱均匀交替的光线照射液晶盒（23），在液晶盒（23）内的液晶混合物发生聚合反应后得到PDLC液晶面板。该方法可使得所制备的PDLC液晶面板亮度均匀。

Description

PDLC液晶面板的制备方法 技术领域
本发明的实施例涉及一种 PDLC液晶面板的制备方法。 背景技术
聚合物分散型液晶 (PDLC, Polymer Dispersed Liquid Crystal)是将低分子 液晶与预聚物相混合， 在一定条件下经聚合反应， 将微米级的液晶微滴均匀 地分散在高分子网络中， 再利用液晶分子的介电各向异性获得具有电光响应 特性的材料。 PDLC主要工作在散射态和透明态之间， 并具有一定的灰度。 相对于传统液晶器件来说， PDLC显示器具有很多优点， 如不需偏振片和取 向层， 制备工艺筒单， 易于制成大面积柔性显示器等。 目前 PDLC已在光学 调制器、 热敏及压敏器件、 电控玻璃、 光阀、 投影显示、 电子书等方面获得 广泛应用。
传统的制作 PDLC液晶面板的一种方法如下所述。 首先将液晶与预聚物 混合， 将混合好的混合物填充到相对设置以构成液晶盒的阵列基板和彩膜基 板之间； 然后， 使用光线照射填充有该混合物的液晶盒， 液晶盒中的混合物 在光线作用下发生聚合反应形成高分子聚合物。 高分子聚合物在光线照射下 形成空间骨架结构， 并在骨架与骨架之间形成 槽结构； 当液晶向 槽部分 运动时便形成了一种分散体系， 使液晶分散在高分子网络中， 由此可获得 PDLC液晶面板。 发明内容
本发明的实施例提供了一种 PDLC液晶面板的制备方法， 以使所制备的
PDLC液晶面板的亮度更加均匀。
本发明的一个方面提供了一种 PDLC液晶面板的制备方法， 包括： 将液 晶分子、 光引发剂和预聚物混合均匀得到液晶混合物； 将所得到的液晶混合 物注入到液晶空盒中形成液晶盒； 利用强弱均匀交替的光线照射液晶盒， 使 液晶盒内的液晶混合物发生聚合反应后得到 PDLC液晶面板。 例如， 在上述方法中， 所述液晶混合物由液晶分子、 光引发剂和预聚物 按照质量比（ 79±5 ) %: ( 1±0.05 ) %: ( 20±5 ) %的比例混合均匀。
例如， 在上述方法中， 利用强弱均匀交替的光线照射液晶盒可以包括： 在液晶盒上方放置掩膜板， 掩膜板上设有透明度均匀交替的图案； 利用光线 照射掩膜板使其透过掩膜板后形成强弱均匀交替的光线； 利用形成的强弱均 匀交替的光线照射液晶盒。
例如， 在上述方法中， 在利用光线照射掩膜板之前， 利用强弱均匀交替 的光线照射液晶盒还包括： 通过激光器输出光线； 将激光器输出的光线照射 到扩束镜上进行扩束。
或者， 与上述使用掩模板的方法不同， 例如， 在上述方法中， 所述利用 强弱均匀交替的光线照射液晶盒还可以包括： 利用光线照射分束棱镜将光线 分成强弱均匀交替分布的透光部分和反射光部分， 以形成强弱均匀交替的光 线； 利用形成的强弱均匀交替的光线照射液晶盒。
例如， 在上述方法中， 所述在利用光线照射分束棱镜之前， 利用强弱均 勾交替的光线照射液晶盒还可以包括： 通过激光器输出光线； 将激光器输出 的光线照射到扩束镜上进行扩束。
例如， 在上述方法中， 所述的液晶盒内的液晶混合物发生聚合反应可以 为： 被强光照射的液晶盒内的液晶混合物先开始发生聚合反应形成聚合物骨 架； 被弱光照射的液晶盒内的液晶混合物后开始发生聚合反应形成聚合物骨 架间的凹槽。
在上述方法中， 为了使液晶盒内的混合物能够发生聚合反应， 例如， 所 述照射液晶盒的光线可以为紫外光。
例如， 在上述方法中， 所述将得到的液晶混合物注入到液晶空盒中可以 为： 通过真空灌注方式将得到的液晶混合物注入到液晶空盒中。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 筒单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为本发明实施例提供的一种 PDLC液晶面板的制备方法的示意图； 图 2为本发明实施例 1提供的一种 PDLC液晶面板的制备方法的示意图； 图 3为本发明实施例 2提供的一种 PDLC液晶面板的制备方法的示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明实施例的技术方案进行清楚、 完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。
在制备传统的 PDLC显示器的制备过程中， 发明人发现在进行混合物固 化过程中难免会出现高分子分布不均的问题， 即高分子骨架分布不均并使得 高分子骨架间的 槽分布不均， 从而造成了 PDLC液晶面板的亮度不均， 影 响液晶面板的整体显示效果。这些高分子骨架间的凹槽为凹槽状（高低不平 ) 形貌， 也包括空洞形状等。
图 1为本发明实施例提供的一种 PDLC液晶面板的制备方法的示意图。 如图 1所示， 所述 PDLC液晶面板的制备方法包括：
步骤 1、 将液晶分子、 光引发剂和预聚物混合均匀得到液晶混合物； 步骤 2、 将所得到的液晶混合物注入到液晶空盒中形成液晶盒； 步骤 3、 利用强弱均匀交替的光线照射液晶盒， 使液晶盒内的液晶混合 物发生聚合反应后得到 PDLC液晶面板。
由于本实施例中通过在液晶盒表面施加强弱均匀交替的光线， 使得强光 (强度高的光）照射的部分因预聚物的聚合反应形成聚合物骨架（即高分子 骨架） ， 弱光（强度低的光）照射部分形成聚合物骨架间的凹槽。 液晶盒中 骨架与 槽的均匀分布使得液晶分子均匀分布在 槽中， 从而形成均匀分布 的高分子体系。 该强弱均匀交替的光线使得在一平面内被光照射区域内光强 度高的部分与强度低的部分彼此均匀交替。
依据上述原理， 本发明实施例的控制 PDLC制作过程可使液晶分子均匀 分布在高分子材料中， 因此相对于传统的制备方法， 本发明的实施例改善了 PDLC液晶面板亮度不均的问题， 从而提高了 PDLC液晶面板的整体品质。
下面将通过具体的实施例 1和实施例 2来说明 PDLC液晶面板的制备方 法的详细步骤。
实施例 1
如图 2所示，实施例 1介绍的 PDLC液晶面板的制备方法包括如下步骤。 步骤 201 ,将液晶分子、光引发剂和预聚物混合均勾得到液晶混合物 21。 例如， 液晶混合物是由液晶分子、 光引发剂和预聚物按质量百分比
( 79±5 ) %: ( 1±0.05 ) %: ( 20±5 ) %的比例混合均匀的， 在这个范围内浮 动的三种物质的百分比之和等于百分之百即可。 试验结果表明， 该比例下混 合而成的液晶混合物发生聚合反应后所形成的聚合物和液晶能够具有较好地 光透过率， 因而使得所制备的 PDLC液晶面板具有较好的亮度。
优选地， 液晶分子、 光引发剂和预聚物按质量比可为 79: 1: 20的比例配 比。
例如， 预聚物可以是具有单官能团的 TMPTA (三羟甲基丙烷三丙烯酸 酯） 、 IBMA (甲基丙烯酸异丁酯） 、 IBOA ( (甲基)丙烯酸异冰片酯）等， 亦可是具有双官能团的 BDDA ( 1,3-丁二醇二丙烯酸酯） 、 DPGDA (二丙二 醇二丙烯酸酯） 、 PEGDA (聚乙二醇双丙烯酸酯）等。
光？ I发剂可又称光敏剂（photosensitizer)或光固 4匕剂（photocuring agent) , 是一类能在紫外光区 (250 ~ 420nm)或可见光区 (400 ~ 800nm)吸收一定波长的 能量， 产生自由基、 阳离子等， 从而引发单体聚合交联固化的化合物。 光引 发剂例如可以为 Irgacure系列 650-659,或 DP系列 1030、 3100、 5000、 5100、 5120等。
例如， 液晶分子是含有刚性结构 (RS)柔性结构 （FS ) 和吸电子基团 (electrondrawing group, EG)结合而成的分子。
例如， 刚性结构 (rigid structure RS)可以是：
Figure imgf000005_0001
Figure imgf000006_0001
或者其他具有刚性性质具有稳定化学结构的五元环六元环的组合或者相 互结合；
例如， 柔性基团 （FS )可以是 -CnH2n+1 ( n为整数）； -0 CnH2n+1 ( n为整 数）等；
例如，吸电子基团是含有较大电负性的基团，例如 -CN;-X(X为卤族元素) 等。
本发明中涉及的液晶分子例如可以有 M 系列 11-1560、 11-1159等； C 系列 5220、 5221; 5213等; S系列 069015等。
步骤 202, 将得到的液晶混合物注入到液晶空盒 22中形成液晶盒 23。 液晶空盒是由阵列极板和对置基板 (例如彩膜基板 )通过封框胶进行密 封而相对设置后形成的，在该液晶空盒内注入液晶则形成液晶盒。本步骤中， 例如将液晶混合物采用真空灌注方式注入到液晶空盒中以得到液晶盒， 采用 真空灌注工艺可使液晶混合物能够更好地渗透到液晶空盒的边沿区域， 减少 气泡的产生， 提高了灌液效果， 从而能够缩短流程， 提高生产效率。
需要说明的是， 上述将得到的液晶混合物注入到液晶空盒中形成液晶盒 的含义不局限于先将阵列基板和彩膜基板对盒后再注入液晶， 也包括先在阵 列基板上制作封框胶并在封框胶内滴注液晶后， 再将阵列基板和彩膜基板对 合。
步骤 203,在液晶盒上方放置掩膜板 24,掩膜板 24上设有透明度均匀交 替的图案。 根据实际的使用情况， 在掩模板 24 上设置的图案可以是由完全透明部 分、 完全不透明部分或者半透明部分（即具有一定的灰度）均匀交替设置形 成的， 这样就可以形成透明度均匀交替的图案， 该图案可使光线在透过掩膜 板后能形成强弱均匀交替的光线。
步骤 204, 通过激光器输出光线。
此步骤中的激光器可以采用 Nd:YAG激光器（钕： 4乙铝石榴石激光器）。 采用 Nd:YAG激光器输出光线，可以获得优良的光束质量。此夕卜， Nd:YAG激 光器采用激光二极管 (LD)作为泵浦源， 体积小、 重量轻、 效率高、 寿命长， 不需要冷却系统， 为激光系统小型化提供了有利条件。
步骤 205, 将激光器输出的光线照射到扩束镜上进行扩束。
经过扩束镜扩束后可以获得更大面积的光束。 而且， 所使用的扩束镜还 具有空间滤波的功能，其能够吸收其他波长范围的光线，而仅透过波长为 254 纳米的紫外光波， 从而使得照射液晶盒的光线为紫外光。 上述液晶盒内注入 的液晶混合物中的预聚物能够在紫外光的照射下发生聚合反应， 从而形成高 分子聚合物。 当然，也可以在步骤 204中使用仅能够发射出紫外光的激光器。
步骤 206 , 利用形成的强弱均匀交替的光线照射液晶盒。
利用形成的强弱均匀交替的光线照射液晶盒表面后， 液晶盒内的液晶混 合物被强光照射的部分先开始发生聚合反应形成聚合物的骨架， 而被弱光照 射的部分后开始发生聚合反应形成聚合物骨架间的凹槽， 伴随聚合反应的不 断进行， 在液晶盒中先开始发生聚合反应的区域处的液晶混合物首先固化， 得后开始发生聚合反应的区域处的预聚物呈现向已经固化的区域移动的趋 的 槽， 液晶分子能够均匀地分布在骨架间的 槽内， 这样便形成了均匀分 布的高分子体系。
在实践中， 可以对上述实施例 1的各个步骤进行多种改变。 例如， 在上 述实施例 1中， 可以先执行步骤 204和 205, 再执行步骤 203。 再例如， 可以 不使用步骤 204和 205, 而是直接利用能够发出紫外光的灯来直接照射灌注 有液晶混合物的液晶盒。
由于在上述实施例 1中， 使用紫外光照射掩模板， 因此上述实施例 1中 介绍的方法可称为紫外掩膜法。
实施例 2
如图 3所示， 实施例 2介绍的另一种 PDLC液晶面板的制备方法包括： 步骤 301 , 将液晶分子、 光引发剂和预聚物混合均匀得到液晶混合物。 步骤 302, 将得到的液晶混合物注入到液晶空盒中形成液晶盒 34。 步骤 303 , 通过激光器 31输出光线。
步骤 304, 将激光器输出的光线照射到扩束镜 32上进行扩束。
这里需要说明的是， 由于本实施例中的步骤 301至步骤 304与上述实施 例 1中的步骤 201至步骤 204对应相同， 即使实施例 1和实施例 2之间存在 些微不同之处， 本领域技术人员也可以依据本领域的相关知识合理推出， 因 此不再详细描述。 下面重点描述本实施例 2的与上述实施例 1相比的不同之 处。
步骤 305,利用光线照射分束棱镜 33将光线分成强弱均匀交替分布的透 光部分和反射光部分， 以形成强弱均匀交替的光线。
扩束后的光线经分束棱镜分束后， 便获得了具有一定光强比的透射与反 射两束光。 即， 把光线分成透光较强， 反射光较弱的两束光线； 或者把光线 分成透光较弱， 反射光较强的两束光线， 其中一束光线直接照射在液晶盒表 面，而另一束光线则通过反射镜 35的反射作用后再照射到液晶盒的表面，这 样液晶盒的表面便获得了由透光部分和反射光部分均勾交替分布的强弱光 线， 最终形成强弱均匀交替的光线。
步骤 306 , 利用分束后形成的强弱均匀交替的光线照射液晶盒 34。 利用分束后形成的强弱均匀交替的光线照射液晶盒表面后， 液晶盒内的 液晶混合物被强光照射的部分先开始发生聚合反应形成聚合物的骨架， 而被 弱光照射的部分后开始发生聚合反应形成聚合物骨架间的凹槽， 伴随聚合反 应的不断进行， 在液晶盒中先开始发生聚合反应的区域处的液晶混合物首先
架间的 槽， 液晶分子能够均匀地分布在骨架间的 槽内， 这样便形成了均 勾分布的高分子体系。 由于在上述实施例 2中， 使用了全息曝光实验光路， 因此上述实施例 2 中介绍的方法可以称为全息曝光法。
由于在本发明实施例提供的 PDLC液晶面板的制备方法中， 通过在液晶 盒表面施加强弱均匀交替的光线， 使得强光照射的部分因预聚物的聚合反应 形成聚合物骨架（即高分子骨架） ， 弱光照射的部分形成聚合物骨架间的 槽， 骨架与 槽均匀分布使得液晶分子均匀分布在 槽中， 从而形成均匀分 布的高分子体系， 依据这一原理能够控制 PDLC制作过程使液晶分子均匀分 布在高分子材料中， 相对于传统的方法， 本发明实施例主要改善了 PDLC液 晶面板亮度不均的问题， 从而提高了 PDLC液晶面板的整体品质。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种 PDLC液晶面板的制备方法， 包括：
将液晶分子、 光引发剂和预聚物混合均匀得到液晶混合物；
将所得到的液晶混合物注入到液晶空盒中形成液晶盒；
利用强弱均匀交替的光线照射液晶盒， 使所述液晶盒内的液晶混合物发 生聚合反应后得到 PDLC液晶面板。
2、根据权利要求 1所述的制备方法，其中，所述液晶混合物由液晶分子、 光引发剂和预聚物按照质量百分比（79±5 ) %: ( 1±0.05 ) %: ( 20±5 ) %的 比例混合均匀而成。
3、根据权利要求 1或 2所述的制备方法， 其中， 利用强弱均匀交替的光 线照射液晶盒包括：
在所述液晶盒上方放置掩膜板， 所述掩膜板上设有透明度强弱均勾交替 的图案；
利用光线照射所述掩膜板使其透过掩膜板后形成强弱均匀交替的光线； 利用所形成的强弱均匀交替的光线照射所述液晶盒。
4、根据权利要求 3所述的制备方法， 在利用光线照射掩膜板之前，还包 括：
通过激光器输出光线；
将所述激光器输出的光线照射到扩束镜上进行扩束。
5、根据权利要求 1或 2所述的制备方法， 其中， 利用强弱均匀交替的光 线照射液晶盒包括：
利用光线照射分束棱镜将光线分成强弱均匀交替分布的透光部分和反射 光部分， 以形成强弱均匀交替的光线；
利用形成的强弱均匀交替的光线照射所述液晶盒。
6、根据权利要求 5所述的制备方法， 在利用光线照射分束棱镜之前，还 包括：
通过激光器输出光线；
将所述激光器输出的光线照射到扩束镜上进行扩束。
7、根据权利要求 1或 2所述的制备方法， 其中， 液晶盒内的液晶混合物 发生聚合反应为：
被强光照射的液晶盒内的液晶混合物先开始发生聚合反应形成聚合物骨 架；
被弱光照射的液晶盒内的液晶混合物后开始发生聚合反应形成聚合物骨 架间的凹槽。
8、 根据权利要求 1-7任一所述的制备方法， 其中， 照射所述液晶盒的光 线为紫外光。
9、 根据权利要求 1-8任一所述的制备方法， 其中， 将所得到的液晶混合 物注入到液晶空盒中包括：
通过真空灌注方式将所得到的液晶混合物注入到所述液晶空盒中。
PCT/CN2013/083595 2013-05-24 2013-09-17 Pdlc液晶面板的制备方法 Ceased WO2014187050A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/370,128 US9557609B2 (en) 2013-05-24 2013-09-17 Method for manufacturing polymer dispersed liquid crystal (PDLC) panel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310198447.XA CN103309074B (zh) 2013-05-24 2013-05-24 一种pdlc液晶面板的制备方法
CN201310198447.X 2013-05-24

Publications (1)

Publication Number Publication Date
WO2014187050A1 true WO2014187050A1 (zh) 2014-11-27

Family

ID=49134464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/083595 Ceased WO2014187050A1 (zh) 2013-05-24 2013-09-17 Pdlc液晶面板的制备方法

Country Status (3)

Country Link
US (1) US9557609B2 (zh)
CN (1) CN103309074B (zh)
WO (1) WO2014187050A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103792671B (zh) 2014-01-24 2017-02-08 北京京东方显示技术有限公司 一种3d眼镜的镜片及制作方法、3d眼镜
TWI529081B (zh) * 2015-01-06 2016-04-11 威宇全球科技股份有限公司 防眩後視鏡
KR101976411B1 (ko) 2017-11-10 2019-05-10 한국과학기술연구원 음향출력이 가능한 스마트 윈도우 및 그 제조방법

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200428041A (en) * 2003-03-31 2004-12-16 Nitto Denko Corp Process for producing wideband cholesteric liquid crystal film, circular polarization plate, linear polarizer, lighting apparatus and liquid crystal display (1)
TW200502595A (en) * 2003-03-31 2005-01-16 Nitto Denko Corp Process for producing wideband cholesteric liquid crystal film, circular polarization plate, linear polarizer, lighting apparatus and liquid crystal display
CN101551542A (zh) * 2009-05-14 2009-10-07 复旦大学 电控开关式全息聚合物分散液晶衍射分束器
CN102681259A (zh) * 2012-04-28 2012-09-19 深圳市华星光电技术有限公司 一种液晶材料的光配向方法及装置
CN102902106A (zh) * 2012-11-14 2013-01-30 深圳市华星光电技术有限公司 液晶分子预倾角的设置方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4613207A (en) * 1984-05-08 1986-09-23 Manchester R & D Partnership Liquid crystal projector and method
US5469278A (en) * 1992-09-25 1995-11-21 Matsushita Electric Industrial Co., Ltd. Liquid crystal panel and viewfinder for video camera and projection display using liquid crystal panel
DE69427671T2 (de) * 1993-10-19 2002-05-08 Sharp Kk Flüssigkristallanzeigevorrichtung und ihr Herstellungsverfahren
DE69428495T2 (de) * 1993-11-26 2002-04-11 Koninklijke Philips Electronics N.V., Eindhoven Multimoden-Laser für ein optisches Informationsverarbeitungssystem, insbesondere für ein neuronales Netz
US5668651A (en) * 1994-03-18 1997-09-16 Sharp Kabushiki Kaisha Polymer-wall LCD having liquid crystal molecules having a plane-symmetrical bend orientation
US6166834A (en) * 1996-03-15 2000-12-26 Matsushita Electric Industrial Co., Ltd. Display apparatus and method for forming hologram suitable for the display apparatus
CN1155851C (zh) * 1997-03-10 2004-06-30 佳能株式会社 液晶显示装置,应用此装置的投影仪及此装置的制作方法
US20020126332A1 (en) * 1998-09-14 2002-09-12 Popovich Milan M. System and method for modulating light intesity
JP2001222017A (ja) * 1999-05-24 2001-08-17 Fujitsu Ltd 液晶表示装置及びその製造方法
US7724347B2 (en) * 2006-09-05 2010-05-25 Tunable Optix Corporation Tunable liquid crystal lens module
US7648645B2 (en) * 2006-11-08 2010-01-19 3M Innovative Properties Company Pre-polymer formulations for liquid crystal displays
US9625878B2 (en) * 2009-03-10 2017-04-18 Drexel University Dynamic time multiplexing fabrication of holographic polymer dispersed liquid crystals for increased wavelength sensitivity
US9436025B2 (en) 2012-04-28 2016-09-06 Shenzhen China Star Optoelectronics Technology Co., Ltd. Method and device of liquid crystal photo-alignment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200428041A (en) * 2003-03-31 2004-12-16 Nitto Denko Corp Process for producing wideband cholesteric liquid crystal film, circular polarization plate, linear polarizer, lighting apparatus and liquid crystal display (1)
TW200502595A (en) * 2003-03-31 2005-01-16 Nitto Denko Corp Process for producing wideband cholesteric liquid crystal film, circular polarization plate, linear polarizer, lighting apparatus and liquid crystal display
CN101551542A (zh) * 2009-05-14 2009-10-07 复旦大学 电控开关式全息聚合物分散液晶衍射分束器
CN102681259A (zh) * 2012-04-28 2012-09-19 深圳市华星光电技术有限公司 一种液晶材料的光配向方法及装置
CN102902106A (zh) * 2012-11-14 2013-01-30 深圳市华星光电技术有限公司 液晶分子预倾角的设置方法

Also Published As

Publication number Publication date
US20150309345A1 (en) 2015-10-29
US9557609B2 (en) 2017-01-31
CN103309074A (zh) 2013-09-18
CN103309074B (zh) 2016-02-24

Similar Documents

Publication Publication Date Title
JP2610686B2 (ja) 光重合マトリクスにおける液晶溶滴の分散およびそれから製造された装置および製造方法
KR960007252B1 (ko) 복합재료, 그를 포함하는 액정 디스플레이 장치 및 그의 제조방법
TWI379109B (en) High-efficient, tuneable and switchable optical elements based on polymer-liquid crystal composites and films, mixtures and a method for their production
JP6188781B2 (ja) シール剤組成物、液晶汚染を防止する方法、液晶パネル及び表示装置
CN1422321A (zh) 具有交联聚合层的分层分相复合材料
CN110092875B (zh) 一种基于液晶/高分子复合材料体系的pdlc膜的制备方法
JP2013093205A (ja) 導光板、バックライトユニットおよび液晶表示装置
CN103309074B (zh) 一种pdlc液晶面板的制备方法
JPS6131721B2 (zh)
CN108913159A (zh) 一种可见光屏蔽薄膜材料的制备方法
JP2013231153A (ja) 光重合性組成物及びこれを重合した光制御フィルム
JP7496103B2 (ja) 液晶組成物および温度応答性調光素子
CN102819135A (zh) 一种具有荧光效应的聚合物分散液晶薄膜的制备方法
US20040099841A1 (en) Liquid crystal composition, liquid crystal display element, method for manufacturing same, and method for controlling same
CN114527591B (zh) 液晶显示面板的制备方法及液晶显示面板
JP2018193456A (ja) 液晶組成物、温度応答性調光素子およびその製造方法
CN114063335A (zh) 一种反式聚合物蜂网液晶显示器的制备方法及显示面板
CN1711489A (zh) 光学各向异性体
JP3208505B2 (ja) 光拡散板及びその製造方法
CN1828350A (zh) 聚合物分散液晶光衰减器阵列及制作方法
WO2024203644A1 (ja) 拡散フィルム、光拡散装置、液晶表示装置、および拡散フィルムの製造方法
CN1202161C (zh) 光致微造型有机聚合物材料及其制备方法
JP4460889B2 (ja) 液晶素子、その製造方法及び調光パネル
WO2025069526A1 (ja) 拡散フィルムおよび光拡散装置
JPWO2013065100A1 (ja) 重合性組成物並びに液晶表示素子

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 14370128

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13885222

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 22.03.2016)

122 Ep: pct application non-entry in european phase

Ref document number: 13885222

Country of ref document: EP

Kind code of ref document: A1