WO2013177893A1 - Reflective polymer dispersed liquid crystal film, liquid crystal panel and liquid crystal display - Google Patents

Reflective polymer dispersed liquid crystal film, liquid crystal panel and liquid crystal display Download PDF

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Publication number
WO2013177893A1
WO2013177893A1 PCT/CN2012/083447 CN2012083447W WO2013177893A1 WO 2013177893 A1 WO2013177893 A1 WO 2013177893A1 CN 2012083447 W CN2012083447 W CN 2012083447W WO 2013177893 A1 WO2013177893 A1 WO 2013177893A1
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liquid crystal
polymer dispersed
substrate
trans
substrates
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PCT/CN2012/083447
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French (fr)
Chinese (zh)
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鹿岛美纪
柳在健
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京东方科技集团股份有限公司
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Publication of WO2013177893A1 publication Critical patent/WO2013177893A1/en

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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
    • 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
    • G02F1/13347—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals working in reverse mode, i.e. clear in the off-state and scattering in the on-state
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13706—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering the liquid crystal having positive dielectric anisotropy

Definitions

  • Embodiments of the present invention relate to a trans-polymer dispersed liquid crystal film, a liquid crystal panel, and a liquid crystal display. Background technique
  • Polymer Dispersed Liquid Crystal is obtained by mixing liquid crystal (LC) with a polymer matrix and polymerizing under certain conditions. After the reaction, the micron-sized liquid crystal droplets are uniformly dispersed in the polymer matrix.
  • the liquid crystal By using the liquid crystal to separate the scattering state and the transparent state and having a certain gray scale, thereby controlling the scattering state and the transmission state, the transmittance of the incident light can be controlled.
  • a conventional PDLC film is usually prepared by using a positive liquid crystal.
  • electrodes are provided on the upper and lower substrates.
  • the negative liquid crystal molecules in the PDLC between the upper and lower substrates are disorderly arranged, so that incident light comes into scattering at the interface between the positive liquid crystal molecules and the polymer matrix, and the milky white scattering state is exhibited.
  • the positive liquid crystal molecules are aligned in the direction of the electric field, so that the incident light comes in and is directly transmitted without reflection and refraction.
  • the trans PDLC film refers to an opaque state under the action of an electric field and a transparent state in the absence of an electric field.
  • the trans PDLC film is generally prepared by using a negative liquid crystal, but the preparation of the negative liquid crystal is complicated compared with the positive liquid crystal, and the production cost is high, thus limiting the application of the trans PDLC film. Summary of the invention
  • the embodiment of the invention provides a trans PDLC film with simple production process and low cost.
  • One aspect of the present invention provides a trans-polymer dispersed liquid crystal film comprising two substrates disposed opposite to each other, wherein a polymer dispersed liquid crystal is disposed between the two substrates, and two substrates are respectively disposed adjacent to the polymer dispersed liquid crystal side
  • An alignment film for vertically orienting liquid crystal molecules wherein the polymer dispersed liquid crystal comprises a positive liquid crystal and a polymer matrix, and the substrate is provided with at least two electrodes, the at least The two electrodes form a horizontal electric field parallel to the substrate between the two substrates.
  • the at least two electrodes are provided on the same substrate, the electrodes are comb electrodes, and the comb electrodes are arranged in a cross.
  • the electrodes are plate electrodes and strip electrodes which are sequentially provided on the same substrate, and an insulating layer is provided between the plate electrodes and the strip electrodes.
  • a wall electrode is provided between the two substrates.
  • the wall electrode is a conductive polymer material.
  • the polymer matrix is an epoxy resin matrix or an acrylic resin matrix.
  • the substrate is a glass substrate, a quartz substrate or a plastic substrate.
  • Another aspect of the present invention provides a liquid crystal panel comprising the above-described trans-polymer dispersion liquid crystal film.
  • Still another aspect of the present invention provides a liquid crystal display comprising the above liquid crystal panel.
  • a trans-PDLC film is prepared by using a positive liquid crystal.
  • an electric field parallel to the substrate is formed between the two transparent substrates, and the liquid crystal molecules are arranged parallel to the substrate, so that the incident light is positive after entering.
  • the scattering between the liquid crystal molecules and the polymer matrix occurs, and the scattering state of the milky white is displayed.
  • the liquid crystal molecules are oriented perpendicular to the substrate under the action of the vertical alignment film, and the trans PDLC film exhibits a transmission state, incident light. It is capable of transmitting out the liquid crystal layer.
  • FIG. 1 is a schematic view showing the structure of a first trans-polymer dispersed liquid crystal film according to the present invention
  • FIG. 2 is a view showing the first trans-polymer dispersed liquid crystal film provided by the present invention when no voltage is applied;
  • 3 is a schematic view showing a voltage applied to a first trans-polymer dispersed liquid crystal film provided by the present invention
  • 4 is a schematic plan view showing an electrode structure of a first trans-polymer dispersed liquid crystal film provided by the present invention
  • FIG. 5 is a schematic view showing the structure of a first trans-polymer dispersed liquid crystal film provided by the present invention
  • FIG. 6 is a cross-sectional view showing a first trans-polymer dispersed liquid crystal film provided by the present invention
  • the trans-polymer dispersed liquid crystal (PDLC) film provided by the embodiment of the invention comprises two substrates disposed opposite to each other, which are respectively a first substrate 1 and a second substrate 2, and a polymer dispersed liquid crystal material is disposed between the two substrates. .
  • An alignment film 4 for vertically aligning liquid crystal molecules is provided on each of the two substrate portions near the polymer dispersed liquid crystal side (inner side).
  • the polymer dispersed liquid crystal includes a positive liquid crystal 5 and a polymer matrix 6. At least two electrodes are disposed on the two substrates, and the at least two electrodes form a horizontal electric field parallel to the substrate between the substrates for controlling the steering of the liquid crystal.
  • the structure of the first type of trans-PDLC film provided by the embodiment of the present invention is as shown in FIG. 1 , which has a first substrate 1 and a second substrate 2 disposed opposite to each other, and two transparent electrodes 3 are disposed on the substrate 2 ,
  • the transparent electrodes 3 are comb electrodes, and the two comb electrodes 3 (3-1, 3-2) are arranged on the same substrate (see Fig. 4).
  • the two comb electrodes 3 can form a horizontal electric field parallel to the transparent substrate in the space between the two substrates 1, 2 after being energized.
  • one of the two electrodes 3-1 serves as a pixel electrode to which a signal voltage is input
  • the other electrode 3-2 serves as a common electrode to which a common voltage is input.
  • the substrate 2 is, for example, an array substrate, and may include a plurality of gate lines and a plurality of data lines, the gate lines and the data lines crossing each other thereby defining pixel units arranged in a matrix, each of the pixel units including as a switching element A thin film transistor and a pixel electrode and a common electrode for controlling the arrangement of the liquid crystal.
  • the gate of the thin film transistor of each pixel is electrically connected or integrally formed with the corresponding gate line
  • the source is electrically connected or integrally formed with the corresponding data line
  • the drain is electrically connected or integrally formed with the corresponding pixel electrode.
  • the substrate 1 serves as a counter substrate, for example, a color filter substrate on which sub-pixels of a color filter and a black matrix defining the sub-pixels are formed.
  • An alignment film 4 is formed on the inner sides of the two substrates.
  • a polyimide (PI) solution is applied on the inner side of each substrate, for example, by spin coating, and after the PI liquid is solidified, a PI film is obtained, and then the PI film is rubbed. The process thus forms fine grooves on the surface thereof, thereby forming an alignment film 4 for vertically orienting the liquid crystal on the substrate.
  • the alignment film 4 on the substrate 2 is disposed on the electrode 3, i.e., covers the electrode 3.
  • a PDLC is provided between the two substrates 1, 2, and the PDLC includes a positive liquid crystal 5 and a polymer matrix 6, thereby obtaining a trans PDLC film.
  • the vertical alignment film 4 aligns the positive liquid crystal molecules perpendicular to the substrate, so that the incident light 7 is directly transmitted after reflection and refraction without being reflected, as shown in FIG. Shown.
  • the positive liquid crystal molecules are arranged parallel to the substrate along the direction of the horizontal electric field, so that the incident light 7 is scattered at the interface between the liquid crystal molecules and the polymer matrix, and the milky white scattering state is displayed, as shown in FIG. Shown.
  • the arrows in the figure indicate the direction of light transmission.
  • the two comb electrodes 3 (3-1, 3-2) are arranged in a crosswise arrangement on the same substrate as shown in Fig. 4 to form an electric field 10 parallel to the substrate, which is only one of the embodiments provided by the present invention.
  • the structure of the second trans-PDLC film provided by the embodiment of the present invention is as shown in FIG. 5.
  • the difference from the above is that the electrode 3 includes a plate electrode 31 and a strip electrode 32 which are sequentially disposed on the same substrate.
  • the strip electrode 32 is disposed above the plate electrode 31, and the plate electrode 31 and the strip electrode 32 An insulating layer 33 is provided between them.
  • one of the two electrodes 3 serves as a pixel electrode to which a signal voltage is input, and the other as a common electrode to which a common voltage is input. Therefore, for example, the substrate 2 serves as an array substrate, and the substrate 1 serves as a counter substrate.
  • a horizontal electric field parallel to the substrates 1, 2 can be formed between the two substrates 1, 2, so that the PDLC including the positive liquid crystal is transparent without an electric field.
  • the state, in the presence of an electric field, is a scattering state, thereby forming a trans-type PDLC film.
  • the third trans PDLC film provided by the embodiment of the present invention is shown in FIG. 6 and FIG. 7.
  • the difference from the above embodiment is that a wall electrode 35 (35-1, 35-2) is disposed between the first substrate 1 and the second substrate 2.
  • 35-1, 35-2 A different voltage is applied between 2 to form a horizontal electric field parallel to the substrate between the two electrodes.
  • one of the two electrodes 35-1 serves as a pixel electrode to which a signal voltage is input
  • the other electrode 35-2 serves as a common electrode to which a common voltage is input. Therefore, for example, the substrate 2 serves as an array substrate, and the substrate 1 serves as an opposite substrate.
  • a horizontal electric field parallel to the substrate can be formed between the two substrates, so that the PDLC including the positive liquid crystal is in a transparent state without an electric field, and is in a scattered state under an electric field, thereby forming a trans form.
  • PDLC film
  • the above wall electrode 35 can be made of a conductive polymer material such as a conductive photoresist.
  • the polymer matrix in the trans PDLC film provided by the embodiment of the present invention may be an epoxy resin matrix or an acrylic resin matrix.
  • the substrates 1 and 2 may be a glass substrate, a quartz substrate or a plastic substrate.
  • the positive liquid crystal Since the positive liquid crystal is used, an electric field parallel to the substrate is formed between the two transparent substrates at the time of power-on, and the positive liquid crystal is arranged parallel to the substrate along the direction of the horizontal electric field, so that the incident light enters the positive liquid crystal molecule. Scattering occurs at the interface with the polymer matrix, and the milky white scattering state is exhibited. Under the condition of no electric field, the liquid crystal molecules are oriented perpendicular to the substrate under the action of the vertical alignment film, so that the incident light can be transmitted through the PDLC layer, and the PDLC film Presenting a transmission state.
  • the preparation of the trans PDLC film by the positive liquid crystal reduces the production cost of the trans PDLC film and simplifies the process of preparing the trans PDLC film.
  • Embodiments of the present invention also provide a liquid crystal panel comprising the above trans-polymer dispersed liquid crystal film.
  • Embodiments of the present invention also provide a liquid crystal display including the above liquid crystal panel.
  • the liquid crystal display can be used, for example, in applications such as computers, televisions, and mobile phones.

Abstract

A reflective polymer dispersed liquid crystal (PDLC) film, comprising two oppositely disposed substrates (1, 2); the two substrates (1, 2) are provided with a PDLC therebetween; one side of each of the two substrates (1, 2) adjacent to the PDLC is respectively provided with an alignment film (4) for vertically aligning the liquid crystal molecules; the PDLC comprises positive liquid crystals (5) and a polymer matrix (6); the substrates (1, 2) are provided with at least two electrodes (3) thereon; the at least two electrodes (3) and the two substrates (1, 2) form a horizontal electric field therebetween in parallel with the substrates (1, 2). Employing positive liquid crystals (5) to prepare the reflective PDLC film reduces the production cost of the reflective PDLC film, and simplifies the preparation process.

Description

反式高分子分散液晶膜、 液晶面板及液晶显示器 技术领域  Trans-polymer dispersed liquid crystal film, liquid crystal panel and liquid crystal display
本发明的实施例涉及一种反式高分子分散液晶膜、 液晶面板及液晶显示 器。 背景技术  Embodiments of the present invention relate to a trans-polymer dispersed liquid crystal film, a liquid crystal panel, and a liquid crystal display. Background technique
高分子分散液晶 （Polymer Dispersed Liquid Crystal, PDLC )是将液晶 ( liquid crystal, LC)与高分子基体相混合， 在一定条件下经聚合反应而得到 的。 反应之后， 微米级的液晶微滴均匀地分散在高分子基体中。 利用液晶分 散射态和透明态之间并具有一定的灰度， 由此控制其散射态和透射态， 可以 控制入射光的透过率。  Polymer Dispersed Liquid Crystal (PDLC) is obtained by mixing liquid crystal (LC) with a polymer matrix and polymerizing under certain conditions. After the reaction, the micron-sized liquid crystal droplets are uniformly dispersed in the polymer matrix. By using the liquid crystal to separate the scattering state and the transparent state and having a certain gray scale, thereby controlling the scattering state and the transmission state, the transmittance of the incident light can be controlled.
由于正性液晶的性能优于负性液晶， 因此普通的 PDLC膜通常釆用正性 液晶来制备。 所制备的液晶面板中， 上下基板上都设有电极。 在没有施加电 压时， 上下基板之间的 PDLC中的负性液晶分子无序排列， 因此入射光进来 以后在正性液晶分子与高分子基体的界面上发生散射， 而显示乳白色的散射 态。 当施加电压的时候， 正性液晶分子是沿着电场的方向排列， 从而入射光 进来以后不发生反射和折射而直接透射出来。  Since the performance of a positive liquid crystal is superior to that of a negative liquid crystal, a conventional PDLC film is usually prepared by using a positive liquid crystal. In the prepared liquid crystal panel, electrodes are provided on the upper and lower substrates. When no voltage is applied, the negative liquid crystal molecules in the PDLC between the upper and lower substrates are disorderly arranged, so that incident light comes into scattering at the interface between the positive liquid crystal molecules and the polymer matrix, and the milky white scattering state is exhibited. When a voltage is applied, the positive liquid crystal molecules are aligned in the direction of the electric field, so that the incident light comes in and is directly transmitted without reflection and refraction.
反式 PDLC膜是指在电场作用下为不透明态， 在无电场下为透明态的 The trans PDLC film refers to an opaque state under the action of an electric field and a transparent state in the absence of an electric field.
PDLC膜。 这对在工作中大多数时间处于透明态的光电器件来说， 更加经济 和方便。 反式 PDLC膜一般釆用负性液晶制备， 但负性液晶的制备相比正性 液晶复杂， 生产成本较高， 因此限制了反式 PDLC膜的应用。 发明内容 PDLC film. This is more economical and convenient for optoelectronic devices that are in a transparent state most of the time at work. The trans PDLC film is generally prepared by using a negative liquid crystal, but the preparation of the negative liquid crystal is complicated compared with the positive liquid crystal, and the production cost is high, thus limiting the application of the trans PDLC film. Summary of the invention
本发明实施例提供一种生产工艺简单， 成本低廉的反式 PDLC膜。 本发明的一个方面提供了一种反式高分子分散液晶膜， 包括彼此相对设 置的两片基板， 两片基板之间设置有高分子分散液晶， 两片基板邻近高分子 分散液晶一侧分别设置有使液晶分子垂直取向的取向膜， 所述高分子分散液 晶包括正性液晶和高分子基体， 所述基板上设置有至少两个电极， 所述至少 两个电极在两基板之间形成平行于基板的水平电场。 The embodiment of the invention provides a trans PDLC film with simple production process and low cost. One aspect of the present invention provides a trans-polymer dispersed liquid crystal film comprising two substrates disposed opposite to each other, wherein a polymer dispersed liquid crystal is disposed between the two substrates, and two substrates are respectively disposed adjacent to the polymer dispersed liquid crystal side An alignment film for vertically orienting liquid crystal molecules, wherein the polymer dispersed liquid crystal comprises a positive liquid crystal and a polymer matrix, and the substrate is provided with at least two electrodes, the at least The two electrodes form a horizontal electric field parallel to the substrate between the two substrates.
在所述反式高分子分散液晶膜中， 例如， 所述至少两个电极设置在同一 基板上， 所述电极为梳状电极， 所述梳状电极交叉排列。  In the trans-polymer dispersed liquid crystal film, for example, the at least two electrodes are provided on the same substrate, the electrodes are comb electrodes, and the comb electrodes are arranged in a cross.
在所述反式高分子分散液晶膜中， 例如， 所述电极为依次设置在同一基 板上的板状电极和条状电极， 所述板状电极和条状电极之间设置有绝缘层。  In the trans-polymer dispersed liquid crystal film, for example, the electrodes are plate electrodes and strip electrodes which are sequentially provided on the same substrate, and an insulating layer is provided between the plate electrodes and the strip electrodes.
在所述反式高分子分散液晶膜中， 例如， 所述两基板之间设置有墙形电 极。 具例如， 所述墙形电极为导电高分子材料。  In the trans-polymer dispersed liquid crystal film, for example, a wall electrode is provided between the two substrates. For example, the wall electrode is a conductive polymer material.
在所述反式高分子分散液晶膜中， 例如， 所述高分子基体为环氧树脂基 体或丙烯酸树脂基体。  In the trans-polymer dispersed liquid crystal film, for example, the polymer matrix is an epoxy resin matrix or an acrylic resin matrix.
在所述反式高分子分散液晶膜中， 例如， 所述基板为玻璃基板、 石英基 板或塑料基板。  In the trans-polymer dispersed liquid crystal film, for example, the substrate is a glass substrate, a quartz substrate or a plastic substrate.
本发明的另一方面提供了一种液晶面板， 包括上述的反式高分子分散液 晶膜。  Another aspect of the present invention provides a liquid crystal panel comprising the above-described trans-polymer dispersion liquid crystal film.
本发明的再一方面提供了一种液晶显示器， 包括上述的液晶面板。  Still another aspect of the present invention provides a liquid crystal display comprising the above liquid crystal panel.
本发明的实施例釆用正性液晶来制备反式 PDLC膜， 在加电时在两片透 明基板之间形成平行于基板的电场， 液晶分子平行于基板排列， 这样入射光 进来以后在正性液晶分子与高分子基体的界面上发生散射， 而显示乳白色的 散射态， 在没有电场的条件下， 液晶分子在垂直取向膜的作用下垂直于基板 取向， 反式 PDLC膜呈现透射态， 入射光能够透射出液晶层。 本方案降低了 反式 PDLC膜的生产成本， 简化了制备工艺。 附图说明  In the embodiment of the present invention, a trans-PDLC film is prepared by using a positive liquid crystal. When power is applied, an electric field parallel to the substrate is formed between the two transparent substrates, and the liquid crystal molecules are arranged parallel to the substrate, so that the incident light is positive after entering. The scattering between the liquid crystal molecules and the polymer matrix occurs, and the scattering state of the milky white is displayed. In the absence of an electric field, the liquid crystal molecules are oriented perpendicular to the substrate under the action of the vertical alignment film, and the trans PDLC film exhibits a transmission state, incident light. It is capable of transmitting out the liquid crystal layer. This solution reduces the production cost of the trans PDLC film and simplifies the preparation process. DRAWINGS
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 简单地介绍，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。  In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, and are not intended to limit the present invention. .
图 1表示本发明提供第一种反式高分子分散液晶膜的结构示意图； 图 2表示本发明提供的第一种反式高分子分散液晶膜未施加电压时的示 意图；  1 is a schematic view showing the structure of a first trans-polymer dispersed liquid crystal film according to the present invention; and FIG. 2 is a view showing the first trans-polymer dispersed liquid crystal film provided by the present invention when no voltage is applied;
图 3表示本发明提供的第一种反式高分子分散液晶膜施加电压时的示意 图； 图 4表示本发明提供的第 种反式高分子分散液晶膜的电极结构的平面 示意图； 3 is a schematic view showing a voltage applied to a first trans-polymer dispersed liquid crystal film provided by the present invention; 4 is a schematic plan view showing an electrode structure of a first trans-polymer dispersed liquid crystal film provided by the present invention;
图 5表示本发明提供的第 种反式高分子分散液晶膜的结构示意图； 图 6表示本发明提供的第 种反式高分子分散液晶膜的截面图； 图 7表示本发明提供的第 种反式高分子分散液晶膜的电极结构的平面 示意图。 具体实施方式  5 is a schematic view showing the structure of a first trans-polymer dispersed liquid crystal film provided by the present invention; FIG. 6 is a cross-sectional view showing a first trans-polymer dispersed liquid crystal film provided by the present invention; A schematic plan view of an electrode structure of a polymer dispersed liquid crystal film. detailed description
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。  The technical solutions of the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings of the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.
除非另作定义， 此处使用的技术术语或者科学术语应当为本发明所属领 域内具有一般技能的人士所理解的通常意义。 本发明专利申请说明书以及权 利要求书中使用的 "第一" "第二" 以及类似的词语并不表示任何顺序、 数 量或者重要性， 而只是用来区分不同的组成部分。 同样， "一个"或者 "一" 等类似词语也不表示数量限制， 而是表示存在至少一个。 "连接" 或者 "相 连" 等类似的词语并非限定于物理的或者机械的连接， 而是可以包括电性的 连接， 不管是直接的还是间接的。 "上" 、 "下" 、 "左" 、 "右" 等仅用 于表示相对位置关系， 当被描述对象的绝对位置改变后， 则该相对位置关系 也相应地改变。  Unless otherwise defined, technical terms or scientific terms used herein shall be of the ordinary meaning understood by those of ordinary skill in the art to which the invention pertains. The words "first", "second" and similar terms used in the specification and claims of the present invention are not intended to indicate any order, quantity or importance, but merely to distinguish different components. Similarly, the words "a" or "an" do not mean a quantity limitation, but rather mean that there is at least one. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to indicate the relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship is also changed accordingly.
本发明实施例提供的反式高分子分散液晶 （PDLC )膜， 包括彼此相对 设置的两片基板， 分别为第一基板 1及第二基板 2, 两片基板之间设置有高 分子分散液晶材料。 两片基板部近高分子分散液晶一侧（内侧）分别设置有 使液晶分子垂直取向的取向膜 4。 高分子分散液晶包括正性液晶 5和高分子 基体 6。 两片基板上设置有至少两个电极， 所述至少两个电极在两基板之间 形成平行于基板的水平电场， 用于对液晶的转向进行控制。  The trans-polymer dispersed liquid crystal (PDLC) film provided by the embodiment of the invention comprises two substrates disposed opposite to each other, which are respectively a first substrate 1 and a second substrate 2, and a polymer dispersed liquid crystal material is disposed between the two substrates. . An alignment film 4 for vertically aligning liquid crystal molecules is provided on each of the two substrate portions near the polymer dispersed liquid crystal side (inner side). The polymer dispersed liquid crystal includes a positive liquid crystal 5 and a polymer matrix 6. At least two electrodes are disposed on the two substrates, and the at least two electrodes form a horizontal electric field parallel to the substrate between the substrates for controlling the steering of the liquid crystal.
本发明实施例提供的第一种反式 PDLC膜的结构如图 1所示， 其具有彼 此相向设置的第一基板 1及第二基板 2,且基板 2上设有两个透明电极 3 , 两 个透明电极 3为梳状电极， 该两个梳状电极 3 ( 3-1、 3-2 )在同一基板上交叉 排列 (参见图 4 )。 两个梳状电极 3在通电之后在两基板 1、 2之间的空间内 就可以形成平行于透明基板的水平电场。 例如， 该两个电极 3-1之一作为像 素电极， 被输入信号电压； 另一个电极 3-2作为公共电极， 被输入公共电压。 The structure of the first type of trans-PDLC film provided by the embodiment of the present invention is as shown in FIG. 1 , which has a first substrate 1 and a second substrate 2 disposed opposite to each other, and two transparent electrodes 3 are disposed on the substrate 2 , The transparent electrodes 3 are comb electrodes, and the two comb electrodes 3 (3-1, 3-2) are arranged on the same substrate (see Fig. 4). The two comb electrodes 3 can form a horizontal electric field parallel to the transparent substrate in the space between the two substrates 1, 2 after being energized. For example, one of the two electrodes 3-1 serves as a pixel electrode to which a signal voltage is input, and the other electrode 3-2 serves as a common electrode to which a common voltage is input.
也即， 基板 2例如为阵列基板， 可以包括多条栅线和多条数据线， 这些 栅线和数据线彼此交叉由此限定了排列为矩阵的像素单元， 每个像素单元包 括作为开关元件的薄膜晶体管和用于控制液晶的排列的像素电极和公共电 极。 每个像素的薄膜晶体管的栅极与相应的栅线电连接或一体形成， 源极与 相应的数据线电连接或一体形成，漏极与相应的像素电极电连接或一体形成。 在下面的描述中， 主要针对单个或多个像素单元进行， 但是其他像素单元可 以相同地形成。 而基板 1作为相对基板， 例如为彩膜基板， 其上形成有彩色 滤光片的子像素以及限定这些子像素的黑矩阵。  That is, the substrate 2 is, for example, an array substrate, and may include a plurality of gate lines and a plurality of data lines, the gate lines and the data lines crossing each other thereby defining pixel units arranged in a matrix, each of the pixel units including as a switching element A thin film transistor and a pixel electrode and a common electrode for controlling the arrangement of the liquid crystal. The gate of the thin film transistor of each pixel is electrically connected or integrally formed with the corresponding gate line, the source is electrically connected or integrally formed with the corresponding data line, and the drain is electrically connected or integrally formed with the corresponding pixel electrode. In the following description, it is mainly performed for a single or a plurality of pixel units, but other pixel units may be formed identically. The substrate 1 serves as a counter substrate, for example, a color filter substrate on which sub-pixels of a color filter and a black matrix defining the sub-pixels are formed.
在两基板的内侧上形成取向膜 4。 例如， 在制备过程中， 在每片基板的 内侧上例如以旋涂的方式涂覆聚酰亚胺（polyimide, PI )液， 待该 PI液固化 后得到 PI薄膜，然后对该 PI薄膜进行摩擦工艺从而在其表面上形成细沟槽， 由此在基板上形成用于对液晶垂直取向的取向膜 4。 该基板 2上的取向膜 4 设置在电极 3上， 即覆盖了电极 3。  An alignment film 4 is formed on the inner sides of the two substrates. For example, in the preparation process, a polyimide (PI) solution is applied on the inner side of each substrate, for example, by spin coating, and after the PI liquid is solidified, a PI film is obtained, and then the PI film is rubbed. The process thus forms fine grooves on the surface thereof, thereby forming an alignment film 4 for vertically orienting the liquid crystal on the substrate. The alignment film 4 on the substrate 2 is disposed on the electrode 3, i.e., covers the electrode 3.
在两张基板 1、 2之间设置有 PDLC, PDLC包括正性液晶 5和高分子基 体 6, 从而得到反式 PDLC膜。  A PDLC is provided between the two substrates 1, 2, and the PDLC includes a positive liquid crystal 5 and a polymer matrix 6, thereby obtaining a trans PDLC film.
上述实施例提供的反式 PDLC膜在没有施加电压的时候， 由于垂直取向 膜 4使正性液晶分子垂直于基板排列， 从而入射光 7进来后不发生反射和折 射而直接透射出来， 如图 2所示。 当施加电压的时候， 正性液晶分子沿着水 平电场的方向平行于基板排列， 从而入射光 7进来以后在液晶分子与高分子 基体的界面上发生散射， 而显示乳白色的散射态， 如图 3所示。 图中箭头表 示光线传输方向。  In the trans-PDLC film provided by the above embodiment, when the voltage is not applied, the vertical alignment film 4 aligns the positive liquid crystal molecules perpendicular to the substrate, so that the incident light 7 is directly transmitted after reflection and refraction without being reflected, as shown in FIG. Shown. When a voltage is applied, the positive liquid crystal molecules are arranged parallel to the substrate along the direction of the horizontal electric field, so that the incident light 7 is scattered at the interface between the liquid crystal molecules and the polymer matrix, and the milky white scattering state is displayed, as shown in FIG. Shown. The arrows in the figure indicate the direction of light transmission.
当然两个梳状电极 3 ( 3-1、 3-2 ) 交叉排列在设置在同一基板上如图 4 所示形成平行于基板的电场 10, 只是本发明提供的实施例之一。  Of course, the two comb electrodes 3 (3-1, 3-2) are arranged in a crosswise arrangement on the same substrate as shown in Fig. 4 to form an electric field 10 parallel to the substrate, which is only one of the embodiments provided by the present invention.
本发明实施例提供的第二种反式 PDLC膜的结构如图 5所示， 与上述不 同之处是，所述电极 3包括依次设置在同一基板上的板状电极 31和条状电极 32。 条状电极 32设置在板状电极 31之上， 所述板状电极 31和条状电极 32 之间设置有绝缘层 33。 例如， 该两个电极 3之一作为像素电极， 被输入信号 电压； 另一个作为公共电极， 被输入公共电压。 因此， 例如基板 2作为阵列 基板， 而基板 1作为相对基板。 The structure of the second trans-PDLC film provided by the embodiment of the present invention is as shown in FIG. 5. The difference from the above is that the electrode 3 includes a plate electrode 31 and a strip electrode 32 which are sequentially disposed on the same substrate. The strip electrode 32 is disposed above the plate electrode 31, and the plate electrode 31 and the strip electrode 32 An insulating layer 33 is provided between them. For example, one of the two electrodes 3 serves as a pixel electrode to which a signal voltage is input, and the other as a common electrode to which a common voltage is input. Therefore, for example, the substrate 2 serves as an array substrate, and the substrate 1 serves as a counter substrate.
当板状电极 31和条状电极 32通电之后， 同样可在两基板 1、 2之间形成 平行于基板 1、 2的水平电场， 使包括有正性液晶的 PDLC在没有电场的条 件下为透明态， 在有电场的条件为散射态， 从而形成反式的 PDLC膜。  After the plate electrode 31 and the strip electrode 32 are energized, a horizontal electric field parallel to the substrates 1, 2 can be formed between the two substrates 1, 2, so that the PDLC including the positive liquid crystal is transparent without an electric field. The state, in the presence of an electric field, is a scattering state, thereby forming a trans-type PDLC film.
本发明实施例提供的第三种反式 PDLC膜如图 6、 图 7所示。 与上述实 施例不同之处是， 第一基板 1和第二基板 2之间设置有墙形电极 35 ( 35-1、 35-2 ) .在相邻两个墙形电极 35-1、 35-2之间施加不同电压， 可在两电极之间 形成平行于基板的水平电场。 例如， 该两个电极 35-1之一作为像素电极， 被 输入信号电压； 另一个电极 35-2作为公共电极， 被输入公共电压。 因此， 例 如基板 2作为阵列基板， 而基板 1作为相对基板。  The third trans PDLC film provided by the embodiment of the present invention is shown in FIG. 6 and FIG. 7. The difference from the above embodiment is that a wall electrode 35 (35-1, 35-2) is disposed between the first substrate 1 and the second substrate 2. In the adjacent two wall electrodes 35-1, 35- A different voltage is applied between 2 to form a horizontal electric field parallel to the substrate between the two electrodes. For example, one of the two electrodes 35-1 serves as a pixel electrode to which a signal voltage is input, and the other electrode 35-2 serves as a common electrode to which a common voltage is input. Therefore, for example, the substrate 2 serves as an array substrate, and the substrate 1 serves as an opposite substrate.
该实施例同样可在两基板之间形成平行于基板的水平电场， 使包括有正 性液晶的 PDLC在没有电场的条件下为透明态，在有电场的条件下为散射态， 从而形成反式的 PDLC膜。  In this embodiment, a horizontal electric field parallel to the substrate can be formed between the two substrates, so that the PDLC including the positive liquid crystal is in a transparent state without an electric field, and is in a scattered state under an electric field, thereby forming a trans form. PDLC film.
上述墙形电极 35可釆用导电高分子材料制备， 如导电光刻胶。  The above wall electrode 35 can be made of a conductive polymer material such as a conductive photoresist.
本发明实施例提供的反式 PDLC膜中的高分子基体可以为环氧树脂基体 或丙烯酸树脂基体。 基板 1、 2可以为玻璃基板、 石英基板或塑料基板。  The polymer matrix in the trans PDLC film provided by the embodiment of the present invention may be an epoxy resin matrix or an acrylic resin matrix. The substrates 1 and 2 may be a glass substrate, a quartz substrate or a plastic substrate.
由于釆用正性液晶， 在加电时在两片透明基板之间形成平行于基板的电 场， 而正性液晶沿着水平电场的方向平行于基板排列， 这样入射光进来以后 在正性液晶分子与高分子基体的界面上发生散射， 而显示乳白色的散射态， 在无电场的条件下， 液晶分子在垂直取向膜的作用下垂直于基板取向， 从而 入射光可以通过 PDLC层透射出去， PDLC膜呈现透射态。 本发明实施例釆 用正性液晶来制备反式 PDLC膜， 降低了反式 PDLC膜的生产成本， 简化了 制备反式 PDLC膜的工艺。  Since the positive liquid crystal is used, an electric field parallel to the substrate is formed between the two transparent substrates at the time of power-on, and the positive liquid crystal is arranged parallel to the substrate along the direction of the horizontal electric field, so that the incident light enters the positive liquid crystal molecule. Scattering occurs at the interface with the polymer matrix, and the milky white scattering state is exhibited. Under the condition of no electric field, the liquid crystal molecules are oriented perpendicular to the substrate under the action of the vertical alignment film, so that the incident light can be transmitted through the PDLC layer, and the PDLC film Presenting a transmission state. In the embodiment of the present invention, the preparation of the trans PDLC film by the positive liquid crystal reduces the production cost of the trans PDLC film and simplifies the process of preparing the trans PDLC film.
本发明的实施例还提供一种液晶面板，包括上述反式高分子分散液晶膜。 本发明的实施例还提供一种液晶显示器， 包括上述的液晶面板。 该液晶 显示器例如可以用于电脑、 电视、 手机等应用。  Embodiments of the present invention also provide a liquid crystal panel comprising the above trans-polymer dispersed liquid crystal film. Embodiments of the present invention also provide a liquid crystal display including the above liquid crystal panel. The liquid crystal display can be used, for example, in applications such as computers, televisions, and mobile phones.
以上实施例仅用以说明本发明的技术方案而非对其进行限制， 本发明的 保护范围应当由所附的权利要求限定。  The above embodiments are only intended to illustrate the technical solutions of the present invention and are not intended to be limiting, and the scope of the present invention should be defined by the appended claims.

Claims

权利要求书 Claim
1. 一种反式高分子分散液晶膜， 包括彼此相对设置的两片基板， 两片基 板之间设置的高分子分散液晶材料， A trans-polymer dispersed liquid crystal film comprising two substrates disposed opposite each other, and a polymer dispersed liquid crystal material disposed between the two substrates,
其中， 两片基板邻近高分子分散液晶一侧分别设置有使液晶分子垂直取 向的取向膜， 所述高分子分散液晶包括正性液晶和高分子基体， 所述基板上 设置有至少两个电极， 所述至少两个电极在两基板之间形成平行于基板的水 平电场。  Wherein the two substrates are respectively disposed adjacent to the polymer dispersed liquid crystal side with an alignment film for vertically orienting the liquid crystal molecules, wherein the polymer dispersed liquid crystal comprises a positive liquid crystal and a polymer matrix, and the substrate is provided with at least two electrodes. The at least two electrodes form a horizontal electric field parallel to the substrate between the two substrates.
2. 根据权利要求 1所述的反式高分子分散液晶膜， 其中， 所述至少两个 电极设置在同一基板上， 所述电极为梳状电极， 所述梳状电极交叉排列。  The trans-polymer dispersed liquid crystal film according to claim 1, wherein the at least two electrodes are provided on the same substrate, the electrodes are comb electrodes, and the comb electrodes are arranged in a cross.
3. 根据权利要求 1所述的反式高分子分散液晶膜， 其中， 所述电极为依 次设置在同一基板上的板状电极和条状电极， 所述板状电极和条状电极之间 设置有绝缘层。  The trans-polymer dispersed liquid crystal film according to claim 1, wherein the electrode is a plate electrode and a strip electrode which are sequentially disposed on the same substrate, and the plate electrode and the strip electrode are disposed between There is insulation.
4. 根据权利要求 1所述的反式高分子分散液晶膜， 其中， 所述两基板之 间设置有墙形电极。  The trans-polymer dispersed liquid crystal film according to claim 1, wherein a wall electrode is provided between the two substrates.
5.根据权利要求 4所述的反式高分子分散液晶膜， 其中， 所述墙形电极 为导电高分子材料。  The trans-polymer dispersed liquid crystal film according to claim 4, wherein the wall electrode is a conductive polymer material.
6. 根据权利要求 1-5任一所述的反式高分子分散液晶膜， 其中， 所述高 分子基体为环氧树脂基体或丙烯酸树脂基体。  The trans-polymer dispersed liquid crystal film according to any one of claims 1 to 5, wherein the polymer matrix is an epoxy resin matrix or an acrylic resin matrix.
7. 根据权利要求 1-7任一所述的反式高分子分散液晶膜， 其中， 所述基 板为玻璃基板、 石英基板或塑料基板。  The trans-polymer dispersed liquid crystal film according to any one of claims 1 to 7, wherein the substrate is a glass substrate, a quartz substrate or a plastic substrate.
8. 一种液晶面板， 包括如权利要求 1-7任一权利要求所述的反式高分子 分散液晶膜。  A liquid crystal panel comprising the trans-polymer dispersed liquid crystal film according to any one of claims 1 to 7.
9. 一种液晶显示器， 包括如权利要求 8所述的液晶面板。  A liquid crystal display comprising the liquid crystal panel of claim 8.
PCT/CN2012/083447 2012-05-31 2012-10-24 Reflective polymer dispersed liquid crystal film, liquid crystal panel and liquid crystal display WO2013177893A1 (en)

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CN102707482A (en) * 2012-05-31 2012-10-03 京东方科技集团股份有限公司 Negative polymer dispersed liquid crystal film, liquid crystal panel and liquid crystal display
CN102914898B (en) * 2012-10-09 2015-01-07 京东方科技集团股份有限公司 PDLC film structure as well as preparation and use method thereof
CN103278976B (en) * 2013-05-30 2016-01-20 京东方科技集团股份有限公司 Liquid crystal panel and preparation method thereof, display device
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CN110989236B (en) * 2019-12-20 2022-08-23 哈尔滨工业大学 Method for preparing flexible trans-polymer dispersed liquid crystal film by utilizing photoetching technology
CN111505857A (en) * 2020-04-21 2020-08-07 福耀玻璃工业集团股份有限公司 PD L C light modulation film and light modulation glass
CN114002867B (en) * 2021-10-08 2022-11-29 北京大学 Trans-mode light adjusting film based on liquid crystal epoxy photoinitiated ring-opening polymerization and preparation method thereof
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