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WO2012146025A1 - 全彩色胆甾型液晶电子纸 - Google Patents

全彩色胆甾型液晶电子纸 Download PDF

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Publication number
WO2012146025A1
WO2012146025A1 PCT/CN2011/082495 CN2011082495W WO2012146025A1 WO 2012146025 A1 WO2012146025 A1 WO 2012146025A1 CN 2011082495 W CN2011082495 W CN 2011082495W WO 2012146025 A1 WO2012146025 A1 WO 2012146025A1
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WO
WIPO (PCT)
Prior art keywords
substrate
liquid crystal
electrode
alignment film
vertical alignment
Prior art date
Application number
PCT/CN2011/082495
Other languages
English (en)
French (fr)
Inventor
赵景罡
Original Assignee
大连东方科脉电子有限公司
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Publication of WO2012146025A1 publication Critical patent/WO2012146025A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
    • G02F1/13473—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells for wavelength filtering or for colour display without the use of colour mosaic filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/34—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 reflector
    • G02F2201/343—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 reflector cholesteric liquid crystal reflector

Definitions

  • the present invention relates to an electronic paper, and more particularly to a full color biliary liquid crystal electronic paper. Background technique
  • cholesteric liquid crystal electronic paper Since cholesteric liquid crystal electronic paper has the advantages of low power consumption, fast response speed and low production cost, especially in color display, it is considered to be the most important electronic paper production technology in the next decade.
  • the full-color bile liquid crystal electronic paper cassette uses a stacked display to achieve full-color display.
  • the principle of the technical solution is as follows:
  • the cholesteric liquid crystal material has a unique light reflection selection characteristic, the ratio of the bile liquid crystal is different, and the wavelength of the reflected light wave is selected. Also, by selecting a suitable material, it is possible to reflect light of three wavelengths of red, green, and blue.
  • the basic structure and color display principle of cholesteric liquid crystal electronic paper pixels The cholesteric liquid crystal electronic paper is a multi-layer structure, each pixel is composed of a 3-layer stack which can reflect "blue-green-red" respectively, and the bottom layer is a light absorbing layer. Each layer of material is in the interlayer of two transparent electrodes.
  • the reflectivity of each of the reflective layers changes to the three primary colors of the ambient light, and the three basic colors of the appropriate intensity are mixed according to the color mixing rule. A certain color, thus achieving a color display.
  • the full-color bile electronic paper of the prior art is composed of six liquid crystal cells stacked by a six-layer substrate, and a bile liquid crystal layer capable of reflecting red, green and blue light is respectively packaged in the three liquid crystal cells, forming a first a bile liquid crystal layer, a second cholesteric liquid crystal layer, and a third bile liquid crystal layer, each of the liquid crystal layers is provided with a vertical alignment film on both upper and lower sides, and the two sides of the vertical alignment film are substrate electrodes, and the light absorption layer is attached On the outer surface of the lowermost substrate, the display portion and the lead portion of the substrate electrode are generally made of an IT0 transparent electrode.
  • the prior art full color cholesteric liquid crystal electronic paper has the advantages of being able to perform high pixel display per unit area, improving the sharpness and brightness of the electronic paper, and saving about 2/3 of the distribution due to the absence of sub-pixel wiring. Line area.
  • the disadvantages are: multi-layer substrate use, high cost; prior art substrate electrodes use ITO transparent electrode, the thinner the ITO transparent electrode, the greater the square resistance, the lower the reflectivity, the higher the transmittance, the display contrast and The higher the brightness, in order to obtain higher display contrast and brightness, it is necessary to use a thin IOT film, but the electrode resistance will increase, which will increase the lead resistance, when the resolution of the cholesteric electronic paper is improved or When the display area is increased, it is difficult to meet the driving requirements due to excessive lead resistance. Therefore, the prior art bile liquid crystal electronic paper has a contrast ratio when the display size is 10 inches or more. The book is falling; the contrast is susceptible to mechanical external forces or stray light crosstalk.
  • Display brightness, contrast and display size are the key factors that determine the easy-to-read e-paper. Improve the contrast and brightness of the prior art full-color cholesteric liquid crystal electronic paper and reduce the production cost. It will be widely used for bile liquid crystal electronic paper. The essential. Summary of the invention
  • the present invention provides a full-color bile liquid crystal electronic paper which can save material cost, reduce product thickness, and has high contrast and brightness as compared with the prior art.
  • a full color cholesteric liquid crystal electronic paper comprises three liquid crystal cells, a multi-layer substrate electrode, a multi-layer vertical alignment film, a light absorbing layer, a cholesteric liquid crystal layer capable of reflecting red, green and blue light, wherein: capable of reflecting red a cholesteric liquid crystal layer of three kinds of light, green and blue, respectively, encapsulated in the three liquid crystal cells, forming a first cholesteric liquid crystal layer, a second cholesteric liquid crystal layer, and a third cholesteric liquid crystal layer,
  • Each of the layers of the substrate electrode includes a display portion and a lead portion, and is characterized by:
  • the full color cholesteric liquid crystal electronic paper further includes a light shielding layer;
  • the multilayer substrate includes: a first substrate, a second substrate, a third substrate, and a fourth substrate, wherein the first substrate includes a display area and a non-display area;
  • the multilayer vertical alignment film includes a first vertical alignment film, a second vertical alignment film, a third vertical alignment film, a fourth vertical alignment film, a fifth vertical alignment film, and a sixth vertical alignment film;
  • the method includes: a first substrate electrode, a second substrate electrode, a third substrate electrode, a fourth substrate electrode, a fifth substrate electrode, and a sixth substrate electrode; wherein:
  • the first substrate, the second substrate, the third substrate, and the fourth substrate are vertically stacked to form the three liquid crystal cells; the first vertical alignment film and the second vertical alignment film are respectively separated from the first liquid crystal Adjacent to the layer, the third vertical alignment film and the fourth vertical alignment film are respectively adjacent to the second liquid crystal layer, and the fifth vertical alignment film and the sixth vertical alignment film respectively Three liquid crystal layers are adjacent;
  • the second substrate electrode is adjacent to the second vertical alignment film; the third substrate electrode is adjacent to the third vertical alignment film; and the fourth substrate electrode is adjacent to the fourth vertical alignment film
  • the fifth substrate electrode is adjacent to the fifth vertical alignment film; the sixth substrate electrode is adjacent to the sixth vertical alignment film; the first substrate electrode is located on a lower side of the first substrate Between the upper sides of the first vertical alignment film, the light shielding layer is attached to the first substrate or the first substrate electrode; the light shielding layer covers only the non-display area of the first substrate;
  • the layer is attached to the sixth substrate electrode; the display portion of the multilayer substrate electrode is a transparent electrode, and the lead portion or all of the lead electrode of the multilayer substrate electrode is a metal electrode, and the metal electrode is electrically connected to the transparent electrode.
  • the light-shielding layer having a thickness of 0. 1 ⁇ 10 ⁇ ⁇ .
  • the metal electrode is made of aluminum, or aluminum and nickel alloy, or aluminum and molybdenum alloy, the metal electrode
  • the book thickness is 50 angstroms to 3000 angstroms.
  • the display portion of the multilayer substrate electrode adopts an IT0 transparent electrode, and the square resistance of the IT0 transparent electrode is greater than 150 ⁇ / ⁇ .
  • the full-color cholesteric liquid crystal electronic paper provided by the invention reduces the thickness of the two-layer substrate, thereby reducing the thickness, saving the cost, increasing the transmittance, and reducing the overall reflectance of the liquid crystal electronic paper.
  • the lead electrode part or all of the lead electrode of the full-color bile liquid crystal electronic paper provided by the present invention reduces the lead resistance of the whole electrode to a few ohms or even smaller, so that the transparent electrode of the display area has an opportunity to be used.
  • the ITO transparent electrode with large square resistance, high transmittance and low reflectance improves the contrast and brightness of the bile liquid crystal electronic paper.
  • the use of the metal electrode greatly reduces the lead resistance of the entire electrode, and solves the problem of driving resistance of the display size of 10 inches or more.
  • the bile liquid crystal electronic paper provided by the present invention can perform 10 inches under the premise of ensuring high brightness and high contrast. The above shows.
  • the full-color bile liquid crystal electronic paper provided by the invention adds a light-shielding layer on the inner surface of the first substrate, can completely shield the light leakage in the non-display area, and can avoid the negative influence of the light leakage in the non-display area on the contrast and brightness of the display area, thereby improving the display.
  • the contrast and brightness of the area improve the display.
  • the full-color cholesteric liquid crystal electronic paper provided by the invention has the light absorbing layer placed on the inner side of the fourth substrate, which can reduce the distance between the light absorbing layer and the display pixel, so that the incident light transmitted through the back substrate electrode is completely absorbed by the light absorbing layer, thereby avoiding less pixels themselves or The unabsorbed light of adjacent pixels causes a scouring effect on the pixels, thereby increasing display brightness and contrast.
  • the present invention provides an excellent structural support for the large-scale fabrication of full-color liquid crystal electronic paper and for improving the display performance of full-color cholesteric liquid crystal electronic paper.
  • FIG. 1 is a schematic view showing the overall structure of a full-color cholesteric liquid crystal electronic paper provided in Embodiment 1.
  • FIG. 2 is a schematic structural view of a light shielding layer of a full-color cholesteric liquid crystal electronic paper according to Embodiment 1.
  • Fig. 3 is a schematic view showing the structure of the first substrate electrode and the second substrate electrode of the full color cholesteric liquid crystal electronic paper provided in the first embodiment.
  • FIG. 4 is a schematic view showing the overall structure of a full-color cholesteric liquid crystal electronic paper provided in Embodiment 2.
  • Fig. 5 is a schematic view showing the structure of the first substrate electrode and the second substrate electrode of the full-color cholesteric liquid crystal electronic paper provided in the second embodiment.
  • FIG. 6 is a schematic view showing the overall structure of a full-color cholesteric liquid crystal electronic paper provided in Embodiment 3. Instruction manual
  • the overall structure of the full-color cholesteric liquid crystal electronic paper provided by the embodiment is that three liquid crystal cells are stacked by the first substrate 1, the second substrate 2, the third substrate 3, and the fourth substrate 4, and the inside thereof is formed.
  • the liquid crystal layers capable of reflecting red, green and blue light namely the first liquid crystal layer 19, the second liquid crystal layer 20, and the third liquid crystal layer 21; the first vertical alignment film 7 and the second vertical alignment film 8 respectively Adjacent to the first liquid crystal layer 19; the third vertical alignment film 9 and the fourth vertical alignment film 10 are adjacent to the second liquid crystal layer 20, respectively; the fifth vertical alignment film 11 and the sixth vertical alignment film 12 are respectively connected to the third liquid crystal layer Layer 21 is adjacent.
  • the second substrate electrode 14 is adjacent to the second vertical alignment film 8; the third substrate electrode 15 is adjacent to the third vertical alignment film 9; the fourth substrate electrode 16 is adjacent to the fourth vertical alignment film 10; and the fifth substrate electrode 17 Adjacent to the fifth vertical alignment film 11.
  • the first substrate electrode 13 is adjacent to the first vertical alignment film 7 and the first substrate 1, respectively, and the light shielding layer 5 is coated on the upper surface of the first substrate 1.
  • the light shielding layer 5 covers only the non-display area of the first substrate 1.
  • the display area 101 of the first substrate 1 is not covered by the light shielding layer 5.
  • the light shielding layer 5 can form a patterned photosensitive material by photolithography.
  • the thickness of the light-shielding layer 5 may be between 0.1 and 10 um.
  • the light absorbing layer 6 is attached to the sixth substrate electrode 18 and is adjacent to the sixth vertical alignment film 12.
  • the first substrate electrode 13 is a COM electrode for driving the first liquid crystal layer
  • the second substrate electrode 14 is a SEG electrode for driving the first liquid crystal layer.
  • the display portion 131 and the second substrate of the first substrate electrode 13 are shown.
  • the display portion 141 of the electrode 14 is a transparent electrode a
  • the lead portion 132 of the first substrate electrode 13 and the lead portion 142 of the second substrate electrode 14 are all made of a metal electrode b.
  • the metal electrode b is in overlapping contact with the outer edge of the transparent electrode a, and the metal electrode b is superposed on the lower surface of the transparent electrode a. It should be noted that the metal electrode b may overlap the upper surface or the lower surface of the transparent electrode a.
  • the material of the transparent electrode a is an IT0 film, the square resistance is ⁇ /port, the material of the metal electrode b is aluminum, and the thickness of the metal electrode is 900. Ai.
  • the third substrate electrode 15 is a COM electrode for driving the second liquid crystal layer
  • the fourth substrate electrode 16 is a SEG electrode for driving the second liquid crystal layer
  • the structure and material of the third substrate electrode 15 and the fourth substrate electrode 16 and the first substrate electrode 13 is the same as the second substrate electrode 14, and will not be described again.
  • the fifth substrate electrode 17 is a COM electrode for driving the third liquid crystal layer
  • the sixth substrate electrode 18 is a SEG electrode for driving the third liquid crystal layer
  • the structure and material of the fifth substrate electrode 17 and the sixth substrate electrode 18 are the first substrate electrode. 13 is the same as the second substrate electrode 14, and will not be described again.
  • Fig. 4 is a schematic view showing the structure of the full-color cholesteric liquid crystal electronic paper provided in the embodiment. In order to avoid redundancy, the differences from the first embodiment will be mainly described herein.
  • the light shielding layer 5' of the full color cholesteric liquid crystal electronic paper provided in this embodiment is applied to the lower surface of the first substrate electrode 13', and is adjacent to the front first vertical alignment film 7', and the light shielding layer 5' of the embodiment l U m ⁇
  • the light-shielding layer 5' only covers the non-display area of the first substrate 1', the thickness of the light-shielding layer 5' is 0. l U m.
  • the light absorbing layer 6' of this embodiment is attached to the sixth substrate electrode 18' and adjacent to the fourth substrate 4'.
  • the first substrate electrode 13' is a COM electrode for driving the first liquid crystal layer
  • the second substrate electrode 14' is a SEG electrode for driving the first liquid crystal layer
  • the display portion 13 of the first substrate electrode electrode 13' and The display portion 141' of the second substrate electrode 14' employs a transparent electrode a'
  • the lead portion 132' of the first substrate electrode 13' and the lead portion 142' of the second substrate electrode 14' are composed of a metal electrode b' and a transparent electrode
  • the combination of a' in order to achieve electrical connection between the metal electrode b' and the transparent electrode a', the metal electrode b' overlaps the transparent electrode a'.
  • the metal electrode b' may overlap the upper surface or the lower surface of the transparent electrode a'.
  • the material of the transparent electrode a' is an IT0 film with a square resistance of 200 ⁇ / ⁇ , and the material of the metal electrode b' is aluminum and a nickel alloy.
  • the metal electrode has a thickness of 50 angstroms.
  • the cholesteric liquid crystal electronic paper provided in this embodiment is different from the second embodiment in that: the light shielding layer 5 is applied to the surface of the first substrate electrode 13 and adjacent to the first substrate 1".
  • the light shielding layer 5" covers only the non-display area of the first substrate 1
  • the thickness of the light-shielding layer 5" is 10 um.
  • the thickness of the light shielding layer of the full-color cholesteric liquid crystal electronic paper provided by the present invention is in the range of 0. lum ⁇ 10um
  • the square resistance of the transparent electrode should be greater than 150 ⁇ / port
  • the thickness of the metal electrode is 50 angstrom.
  • the material of the metal electrode may be aluminum, or aluminum and nickel alloy, or aluminum and molybdenum alloy.
  • the width of the metal electrode is determined according to the size of the display pixel or display pattern, and the larger the display pixel or display pattern, the metal The wider the width of the electrode, the width is as small as a few microns and as large as a millimeter.

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

Description

说 明 书 全彩色胆留型液晶电子纸 技术领域
本发明涉及一种电子纸， 具体地说涉及一种全彩色胆 型液晶电子纸。 背景技术
由于单 /双色电子纸无法显示彩色图像，其应用具有局限性，目前全彩色电子纸技术是众 多厂商的研发方向。
胆甾型液晶电子纸由于具有低功耗、 响应速度快、 生产成本低的优点， 尤其在彩色显示 上具有技术优势， 被认为是未来十年最主要的一种电子纸生产技术。
全彩色胆 型液晶电子纸釆用叠层显示达到全彩色显示目的，该技术方案的原理如下： 胆甾型液晶材料具有独特的光反射选择特性， 胆 型液晶的比例不同， 选择反射的光波波长 也不同， 通过选择合适的材料能实现反射红、 绿、 蓝三种波长的光。 胆甾型液晶电子纸像素 的基本结构和彩色显示原理： 胆 型液晶电子纸为多层结构， 每个像素由分别能反射 "蓝- 绿-红 "的 3层堆叠构成， 底层是光吸收层， 每层材料都处于两个透明电极的夹层中。 当驱动 电压分别加载到 3个反射层的电极时， 各反射层对环境光中 3种基色光的反射率相应改变， 所反射的 3种适当强度的基色光依照混色规律就可以混合成所需的某种颜色， 从而实现彩色 显示。
现有技术的全彩色胆 型电子纸是由六层基板叠加组成三个液晶盒， 能够反射红、 绿、 蓝三种光的胆 型液晶层分别封装于所述三个液晶盒内， 形成第一胆 型液晶层、 第二胆甾 型液晶层、 第三胆 型液晶层， 每一液晶层均的上下两侧均附有垂直取向膜， 垂直取向膜的 两侧为基板电极， 吸光层附着于最下层基板的外表面， 基板电极的显示部分和引线部分采用 通常采用 IT0透明电极。
现有技术的全彩色胆 型液晶电子纸具有如下优点：能够在单位面积上进行高像素显示， 提高电子纸的清晰度和亮度， 由于没有子像素的配线， 可以节约 2/3左右的配线面积。
不足之处在于： 多层使用基板， 成本高； 现有技术的基板电极均采用 ITO透明电极， ITO 透明电极越薄， 方阻也越大， 反射率越低， 透射率越高， 显示对比度和亮度越高， 为了获得 较高的显示对比度和亮度， 需要使用较薄的 IT0薄膜，但电极方阻就会增大，这就会使引线电 阻增大，当胆 型液晶电子纸解析度提高或者显示面积增大时，会由于引线电阻过大， 而难以 满足驱动要求。 因此现有技术的胆 型液晶电子纸， 当显示尺寸 10英寸以上时， 对比度会显 说 明 书 著下降； 对比度易受机械外力或者杂射光串扰影响。
显示亮度、 对比度及显示尺寸是决定电子纸易读的关键因素， 改善现有技术全彩色胆甾 型液晶电子纸的对比度及亮度以及降低生产成本， 将是胆 型液晶电子纸能否广泛应用的关 键。 发明内容
有鉴于此， 本发明提供了一种全彩色胆 型液晶电子纸， 该胆 型液晶电子纸与现有技 术相比能够节省材料成本、 降低产品厚度， 具有较高的对比度和亮度。
为了实现上述目的， 本发明釆用如下技术方案：
一种全彩色胆 型液晶电子纸包括三个液晶盒， 多层基板电极、 多层垂直取向膜， 吸光 层、 能够反射红、 绿、 蓝三种光的胆 型液晶层， 其中： 能够反射红、 绿、 蓝三种光的胆甾 型液晶层分别封装于所述三个液晶盒内， 形成第一胆 型液晶层、 第二胆 型液晶层、 第三 胆甾型液晶层， 所述多层基板电极的每一层均包括显示部分和引线部分， 其特征在于：
所述全彩色胆 型液晶电子纸还包括遮光层； 所述多层基板包括： 第一基板、第二基板、 第三基板、 第四基板， 所述第一基板包括显示区域和非显示区域； 所述多层垂直取向膜包括 第一垂直取向膜、 第二垂直取向膜、 第三垂直取向膜、 第四垂直取向膜、 第五垂直取向膜、 第六垂直取向膜； 所述多层基板电极包括： 第一基板电极、 第二基板电极、 第三基板电极、 第四基板电极、 第五基板电极、 第六基板电极； 其中：
所述第一基板、 第二基板、 第三基板、 第四基板垂直叠加围成所述三个液晶盒； 所述第一垂直取向膜和所述第二垂直取向膜分别与所述第一液晶层相邻， 所述第三垂直 取向膜和所述第四垂直取向膜分别与所述第二液晶层相邻， 所述第五垂直取向膜和所述第六 垂直取向膜分别与所述第三液晶层相邻；
所述第二基板电极与所述第二垂直取向膜相邻； 所述第三基板电极与所述第三垂直取向 膜相邻； 所述第四基板电极与所述第四垂直取向膜相邻； 所述第五基板电极与所述第五垂直 取向膜相邻； 所述第六基板电极与所述第六垂直取向膜相邻； 所述第一基板电极位于所述第 一基板下侧和所述第一垂直取向膜上侧之间， 所述遮光层附着于所述第一基板或所述第一基 板电极； 所述遮光层仅覆盖所述第一基板的非显示区域； 所述吸光层附着于所述第六基板电 极； 所述多层基板电极的显示部分采用透明电极， 所述多层基板电极的引线部分或全部采用 金属电极， 所述金属电极与所述透明电极电连接。
优选的， 所述遮光层采用光敏材料或油墨材料， 所述遮光层颜色为黑色， 所述遮光层的 厚度为 0. 1〜10 μ ιη。
优选的， 所述金属电极使用材料为铝， 或铝与镍合金， 或铝与钼合金， 所述金属电极的 说 明 书 厚度为 50埃〜 3000埃。
优选的， 所述所述多层基板电极的显示部分采用 IT0透明电极， 所述 IT0透明电极的方阻 大于 150 Ω /口。
本发明提供的全彩色胆 型液晶电子纸的有益效果如下：
本发明提供的全彩色胆 型液晶电子纸与现有技术相比， 减少了两层基板， 从而能够降 低厚度， 节约成本， 增加透过率， 减少液晶电子纸的整体反射率。
本发明提供的全彩色胆 型液晶电子纸的基板电极的引线部分或全部釆用金属电极， 将 整个电极的引线电阻降到几欧姆的数量极甚至更小， 使显示区域的透明电极有机会使用方阻 大、透射率高、 反射率低的 ITO透明电极， 从而提高了胆 型液晶电子纸的对比度和亮度。 金 属电极的使用使整个电极的引线电阻大幅下降，解决了显示尺寸 10英寸以上的驱动阻容问题， 本发明提供的胆 型液晶电子纸在保证高亮度和高对比度的前提下， 能够进行 10英寸以上显 示。
本发明提供的全彩色胆 型液晶电子纸在第一基板的内表面增加遮光层， 能够完全屏蔽 非显示区域漏光， 能够避免非显示区域漏光对显示区对比度和亮度的负面影响， 从而提高了 显示区的对比度和亮度， 改善了显示效果。
本发明提供的全彩色胆 型液晶电子纸将吸光层放置于第四基板内侧， 能够减少吸光层 和显示像素的距离， 使透过后基板电极的入射光完全被吸光层吸收， 避免少像素自身或邻近 像素的未吸收光线对像素造成的冲刷效应， 从而提高显示亮度和对比度。
本发明将为全彩色液晶电子纸的大尺寸制造和提高全彩化胆 型液晶电子纸的显示性能 提供了一个优良的结构支持。 附图说明
图 1是实施例一提供的全彩色胆甾型液晶电子纸的整体结构示意图。
图 2是实施例一提供的全彩色胆甾型液晶电子纸的遮光层的结构示意图。
图 3是实施例一提供的全彩色胆 型液晶电子纸第一基板电极与第二基板电极叠加的结 构示意图。
图 4是实施例二提供的全彩色胆甾型液晶电子纸的整体结构示意图。
图 5是实施例二提供的全彩色胆 型液晶电子纸第一基板电极与第二基板电极叠加的结 构示意图。
图 6是实施例三提供的全彩色胆甾型液晶电子纸的整体结构示意图。 说 明 书
1， 1'， 1 第一基板； 2， 2', 2 " ： 第二基板；
3， 3'， 3 第三基板； 4， 4' , 4 "： 第四基板；
5， 5'， 5 遮光层； 6， 6'， 6 "： 吸光层；
7， V ， 7 第一垂直取向膜； 8， 8'， 8 "： 第二垂直取向膜；
9， 9'， 9 第三垂直取向膜； 10， 10'， 10 " : 第四垂直取向膜；
11， 11 ' 11 "： 第五垂直取向膜； 12， 12'， 12 " : 第六垂直取向膜;
13, 13 13 "： 第一基板电极； 14, 14', 14 " : 第二基板电极；
15, 15 15 "： 第三基板电极； 16, 16', 16 " : 第四基板电极；
17, 17 17 "： 第五基板电极； 18, 18', 18 " : 第六基板电极；
19， 19 19 "： 第一液晶层； 20， 20'， 20 "： 第二液晶层；
21, 21 12 "： 第三液晶层； a， a'， a " ： 透明电极；
b， b'， b 金属电极； 具体实施方式
为了使本领域技术人员更好地理解及实现本发明，下面结合附图和具体实施例对本发明 的具体实施方式做详细的说明， 本发明的保护范围并不局限于具体实施例所述的范围。
实施例一
如图 1所示， 本实施例提供的全彩色胆 型液晶电子纸总体结构是由第一基板 1、 第二 基板 2、 第三基板 3、 第四基板 4叠加形成三个液晶盒， 其内部分别装有能够反射红、 绿、 蓝 三种光的液晶层， 即第一液晶层 19， 第二液晶层 20， 第三液晶层 21; 第一垂直取向膜 7与 第二垂直取向膜 8分别与第一液晶层 19相邻； 第三垂直取向膜 9与第四垂直取向膜 10分别 与第二液晶层 20相邻；第五垂直取向膜 11与第六垂直取向膜 12分别与第三液晶层 21相邻。
第二基板电极 14与第二垂直取向膜 8相邻；第三基板电极 15与第三垂直取向膜 9相邻； 第四基板电极 16与第四垂直取向膜 10相邻； 第五基板电极 17与第五垂直取向膜 11相邻。
第一基板电极 13分别与第一垂直取向膜 7和第一基板 1相邻， 遮光层 5涂覆于第一基 板 1的上表面。
如图 2所示， 遮光层 5仅覆盖第一基板 1的非显示区， 第一基板 1的显示区 101不被遮 光层 5覆盖， 遮光层 5可以使用光刻法形成图案的光敏材料， 亦可以使用印刷法形成图案的 油墨材料， 遮光层 5的厚度可以在 0. 1至 10um之间。
如图 1所示， 吸光层 6附着于第六基板电极 18并紧邻第六垂直取向膜 12。 说 明 书 第一基板电极 13为驱动第一液晶层的 COM电极， 第二基板电极 14为驱动第一液晶层的 SEG电极，如图 3所示，第一基板电极 13的显示部分 131和第二基板电极 14的显示部分 141， 采用透明电极 a， 第一基板电极 13的引线部分 132和第二基板电极 14的引线部分 142全部 采用金属电极 b， 为了实现金属电极 b与透明电极 a的电连接， 金属电极 b与透明电极 a的 外缘重叠接触， 金属电极 b重叠于透明电极 a的下面。 需要说明的是， 金属电极 b重叠于透 明电极 a的上面或下面均可， 透明电极 a的材料为 IT0薄膜， 方阻为 ΙδΟΩ/口， 金属电极 b 的材料为铝， 金属电极的厚度为 900埃。
第三基板电极 15为驱动第二液晶层的 COM电极， 第四基板电极 16为驱动第二液晶层的 SEG电极， 第三基板电极 15和第四基板电极 16的结构及材质与第一基板电极 13和第二基板 电极 14相同， 在此不再赘述。
第五基板电极 17为驱动第三液晶层的 COM电极， 第六基板电极 18为驱动第三液晶层的 SEG电极， 第五基板电极 17和第六基板电极 18的结构及材质与第一基板电极 13和第二基板 电极 14相同， 在此不再赘述。
实施例二
图 4是本实施例提供的全彩色胆 型液晶电子纸的结构示意图， 为了避免赘述， 在此主 要描述与实施例一的不同之处。
本实施例提供的全彩色胆 型液晶电子纸的遮光层 5' 涂覆于第一基板电极 13' 的下表 面， 并紧邻前第一垂直取向膜 7'， 本实施例的遮光层 5' 的结构与实施例一相同， 遮光层 5' 仅覆盖第一基板 1' 的非显示区， 不覆盖显示区， 遮光层 5' 的厚度为 0. lUm。
本实施例的吸光层 6' 附着于第六基板电极 18' 并与第四基板 4' 相邻。
第一基板电极 13' 为驱动第一液晶层的 COM电极， 第二基板电极 14' 为驱动第一液晶层 的 SEG电极， 如图 5所示， 第一基板电极电极 13' 的显示部分 13 和第二基板电极 14' 的 显示部分 141'， 采用透明电极 a'， 第一基板电极电极 13' 的引线部分 132' 和第二基板电极 14' 的引线部分 142' 由金属电极 b' 和透明电极 a' 的组合而成， 为了实现金属电极 b' 与 透明电极 a' 的电连接， 金属电极 b' 重叠于透明电极 a' 上面。 需要说明的是， 金属电极 b' 重叠于透明电极 a' 的上面或下面均可， 透明电极 a' 的材料为 IT0薄膜，方阻为 200Ω/Ο， 金属电极 b' 的材料为铝与镍合金， 金属电极的厚度为 50埃。
实施例三
如图 6所示， 本实施例提供的胆甾型液晶电子纸与实施例二的区别在于： 遮光层 5 "涂 覆于第一基板电极 13 "表面， 并紧邻第一基板 1 "， 本实施例遮光层 5 "的结构与实施例二 说 明 书 相同， 遮光层 5 "仅覆盖第一基板 1 "的非显示区， 遮光层 5 "的厚度为 10um。
需要说明的是， 本发明提供的全彩色胆甾型液晶电子纸的遮光层的厚度在 0. lum〜10um 范围内， 透明电极的方阻应大于 150 Ω /口， 金属电极的厚度在 50埃〜 3000埃范围内， 金属电 极的材料可以是铝、 或铝与镍合金， 或铝与钼合金， 金属电极的宽度根据显示像素或显示图 形的大小来决定， 显示像素或显示图形越大， 金属电极的宽度越宽， 其宽度小至数微米， 大 到毫米极。
以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本领域的技术人员 来说， 本发明可以有各种更改和变化。 凡在本发明的更改和变化之内， 所做的任何修改、 等 同替换和改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1、 一种全彩色胆 型液晶电子纸，包括三个液晶盒， 多层基板电极、 多层垂直取向膜， 吸光层、 能够反射红、 绿、 蓝三种光的胆 型液晶层， 其中： 能够反射红、 绿、 蓝三种光的 胆甾型液晶层分别封装于所述三个液晶盒内， 形成第一胆 型液晶层、 第二胆 型液晶层、 第三胆 型液晶层， 所述多层基板电极的每一层均包括显示部分和引线部分， 其特征在于： 所述全彩色胆 型液晶电子纸还包括遮光层； 所述多层基板包括： 第一基板、第二基板、 第三基板、 第四基板， 所述第一基板包括显示区域和非显示区域； 所述多层垂直取向膜包括 第一垂直取向膜、 第二垂直取向膜、 第三垂直取向膜、 第四垂直取向膜、 第五垂直取向膜、 第六垂直取向膜； 所述多层基板电极包括： 第一基板电极、 第二基板电极、 第三基板电极、 第四基板电极、 第五基板电极、 第六基板电极； 其中：
所述第一基板、 第二基板、 第三基板、 第四基板垂直叠加围成所述三个液晶盒； 所述第一垂直取向膜和所述第二垂直取向膜分别与所述第一液晶层相邻， 所述第三垂直 取向膜和所述第四垂直取向膜分别与所述第二液晶层相邻， 所述第五垂直取向膜和所述第六 垂直取向膜分别与所述第三液晶层相邻；
所述第二基板电极与所述第二垂直取向膜相邻； 所述第三基板电极与所述第三垂直取向 膜相邻； 所述第四基板电极与所述第四垂直取向膜相邻； 所述第五基板电极与所述第五垂直 取向膜相邻； 所述第六基板电极与所述第六垂直取向膜相邻； 所述第一基板电极位于所述第 一基板下侧和所述第一垂直取向膜上侧之间， 所述遮光层附着于所述第一基板或所述第一基 板电极； 所述遮光层仅覆盖所述第一基板的非显示区域； 所述吸光层附着于所述第六基板电 极； 所述多层基板电极的显示部分采用透明电极， 所述多层基板电极的引线部分或全部采用 金属电极， 所述金属电极与所述透明电极电连接。
2、 权利要求 1所述一种全彩色胆 型液晶电子纸， 其特征在于： 所述遮光层采用光敏材 料或油墨材料， 所述遮光层颜色为黑色， 所述遮光层的厚度为 0. 1〜10 μ πι。
3、 权利要求 1所述一种全彩色胆 型液晶电子纸， 其特征在于： 所述金属电极使用材料 为铝， 或铝与镍合金， 或铝与钼合金， 所述金属电极的厚度为 50埃〜 3000埃。
4、 权利要求 1所述一种全彩色胆 型液晶电子纸， 其特征在于： 所述多层基板电极的显 示部分采用 IT0透明电极， 所述 IT0透明电极的方阻大于
150 Ω /口。
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TWI796895B (zh) 2021-12-23 2023-03-21 友達光電股份有限公司 顯示裝置
CN116419598B (zh) * 2023-06-09 2023-09-19 惠科股份有限公司 Oled结构和oled显示屏
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