WO2014012307A1 - 液晶显示装置 - Google Patents

液晶显示装置 Download PDF

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Publication number
WO2014012307A1
WO2014012307A1 PCT/CN2012/084117 CN2012084117W WO2014012307A1 WO 2014012307 A1 WO2014012307 A1 WO 2014012307A1 CN 2012084117 W CN2012084117 W CN 2012084117W WO 2014012307 A1 WO2014012307 A1 WO 2014012307A1
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WIPO (PCT)
Prior art keywords
liquid crystal
layer
film layer
cholesteric liquid
display device
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PCT/CN2012/084117
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English (en)
French (fr)
Inventor
赵伟利
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to JP2015521940A priority Critical patent/JP6144762B2/ja
Priority to KR1020137014208A priority patent/KR20140041390A/ko
Priority to US13/995,949 priority patent/US9798212B2/en
Priority to EP12852446.9A priority patent/EP2876492A4/en
Publication of WO2014012307A1 publication Critical patent/WO2014012307A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—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
    • G02F1/13718—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 based on a change of the texture state of a cholesteric liquid crystal
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133541—Circular polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133543—Cholesteric polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133567—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the back side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • 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

  • Embodiments of the present invention relate to a liquid crystal display device. Background technique
  • the cholesteric liquid crystal contains a plurality of layers, and the molecules are arranged in the same direction in each layer, but the orientation of the molecules in the adjacent two layers is slightly rotated, and the angle is about 15 minutes, and the spiral structure is obtained by layer-by-layer stacking.
  • the arrangement of the upper layer molecules is rotated by 360° with respect to the lower layer, the distance between the upper layer and the lower layer is a pitch p.
  • the cholesteric liquid crystal is further divided into a left-handed cholesteric liquid crystal and a right-handed cholesteric liquid crystal, which are capable of reflecting left-handed circularly polarized light and right-handed circularly polarized light, respectively.
  • ⁇ the average refractive index of cholesteric liquid crystal
  • ⁇ the pitch of cholesteric liquid crystal
  • the cholesteric liquid crystal also has a bistable property, that is, it can be in a planar orientation (after applying a high voltage) or a pseudo-compression orientation (after applying a low voltage) when no power is applied, and it will be vertically arranged when powered. In normal VA (Vertical Alignment) mode LCD.
  • VA Very Alignment
  • Embodiments of the present invention are intended to provide a liquid crystal display device using cholesteric liquid crystal.
  • An aspect of the invention provides a liquid crystal display device, comprising: a backlight; a first twisted cholesteric liquid crystal film layer on an upper side of the backlight as a light-emitting surface side; an array substrate located at the first Rotating to the upper side of the cholesteric liquid crystal film layer; the color film substrate on the upper side of the array substrate; and a second twisting cholesteric liquid crystal layer interposed between the array substrate and the color filter substrate, the first rotation Opposite to the second direction of rotation.
  • a reflection sheet having a reflecting surface facing the first twisted-direction liquid crystal film layer is provided on the lower side of the backlight.
  • the first spiral bile liquid crystal film layer is left-handed cholesteric a liquid crystal film layer; the second twisted bile liquid crystal layer is a right-handed bile ⁇ liquid crystal layer.
  • the first twisted bile liquid crystal film layer is a right-handed bile ⁇ liquid crystal film layer; and the second spiral bile ⁇ liquid crystal layer is left-handed bile ⁇ Liquid crystal layer.
  • the array substrate includes: a lower substrate disposed adjacent to the first toroidal cholesteric liquid crystal film layer; and a pixel electrode layer on an upper surface of the lower substrate.
  • the color filter substrate includes: an upper substrate; and a color film layer and a common electrode layer which are sequentially formed on a lower surface of the upper substrate.
  • the liquid crystal display device composed of the reflectivity and the bistable property of the cholesteric liquid crystal has the following advantages: the transmittance of the display is greatly improved; in the case of providing the reflective sheet, the light source efficiency can be greatly improved, and the panel brightness is strong. , saving energy; process steps and production costs are reduced.
  • FIG. 1 is a schematic view of a liquid crystal display in a dark state according to an embodiment of the present invention
  • FIG. 2 is a schematic view of a liquid crystal display in a bright state according to an embodiment of the present invention
  • the array substrate of the embodiment of the present invention includes a plurality of gate lines and a plurality of data lines, the gate lines and the data lines crossing each other thereby defining a plurality of pixel units arranged in a matrix; each of the pixel units includes, for example, a thin film as a switching element A transistor (TFT) and a pixel electrode for controlling the arrangement of the liquid crystal.
  • TFT switching element A transistor
  • 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 color filter substrate includes, for example, a black matrix and a plurality of color filters located in a plurality of pixel units defined by the black matrix.
  • the color filters of these pixel units include, for example, red, green, and blue (RGB) color filters, which are arranged in some manner to correspond to pixel cells on the array substrate. White light is transmitted through these colored color filters and becomes light of the corresponding color for color display.
  • the color film substrate may further include a common electrode for mating with pixel electrodes in the pixel unit on the array substrate to apply an electric field to the liquid crystal.
  • the present embodiment describes a liquid crystal display device, including: a backlight 1; a first spiral bile liquid crystal film layer 2 located on a light emitting surface side of the backlight 1; a TFT substrate 3 located on an upper side of the first fused liquid crystal film layer 2; a color filter substrate 5 on an upper side of the TFT substrate 3; and a second cholesteric liquid crystal layer 4 interposed therebetween Between the TFT substrate 3 and the color filter substrate 5.
  • the TFT substrate 3 is an example of an array substrate.
  • the "upper side” is the side facing the viewing surface of the liquid crystal display device
  • the “lower side” is the side facing away from the viewing surface of the liquid crystal display device, as shown in Fig. 1 or Fig. 2.
  • the lower side of the backlight 1 is provided with a reflecting surface facing the first rotating cholesteric liquid
  • the reflection sheet 6 of the crystal film layer 2, that is, the first rotation cholesteric liquid crystal film layer 2 and the reflection sheet 6 are opposed to each other with the backlight 1 interposed therebetween.
  • the reflection sheet may not be provided in the next booklet of the backlight 1, although the light source utilization rate of the embodiment in which the reflection sheet is not provided may be lowered.
  • the reflection sheet 6 is, for example, a metal piece or a plastic piece such as a metal reflective layer plated on the surface.
  • the first twisted bile liquid crystal film layer 2 is a left-handed bile ⁇ liquid crystal film layer; and the second spiral bile liquid crystal layer 4 is a right-handed bile ⁇ liquid crystal layer.
  • the first twisted cholesteric liquid crystal film layer 2 may be a right-handed cholesteric liquid crystal film layer; and the second twisted cholesteric liquid crystal layer 4 may be left-handed gallbladder ⁇ Liquid crystal layer.
  • these left-handed bile liquid crystals and right-handed bile liquid crystal liquid crystal materials can be used in the art, and will not be described herein.
  • the backlight 1 can be a direct-lit or side-illuminated backlight, such as a cold cathode fluorescent lamp
  • CCFL CCFL
  • LED light emitting diode
  • the light emitted by the backlight 1 includes left-handed polarization and right-handed polarization.
  • the left-handed sputum liquid crystal film reflects the left-handed polarized light and transmits the right-handed polarized light;
  • the right-handed cholesteric liquid crystal film reflects the right-handed polarized light and transmits the left-handed polarized light. Therefore, for the embodiment shown in FIG.
  • the light emitted by the backlight 1 is only transmitted by the right-handed light after passing through the left-handed liquid crystal film layer 2, and the left-handed polarized light is reflected, that is, only half of the light is transmitted, and Half is reflected by the left-handed bile ⁇ ⁇ liquid crystal film layer 2.
  • the reflected left-handed polarized light is returned to the left-handed bile ⁇ liquid crystal film layer 2 at the reflection sheet 6; since the left-handed polarized light becomes right-handed polarized light after reflection, it becomes transparent to the left-handed bile ⁇ liquid crystal film Layer 2. Therefore, in the case where the reflection sheet 6 is provided, the light emitted from the backlight 1 will pass through all of the left-handed ⁇ ⁇ ⁇ liquid crystal film layer 2 in the form of right-handed polarization.
  • FIG. 1 A schematic view of the liquid crystal display device of this embodiment in a dark state is shown in FIG.
  • the right-handed cholesteric liquid crystal layer 4 corresponding to a certain pixel unit is in a planar orientation of one of the bistable states, and will reflect right-handed polarized light.
  • the light emitted from the backlight 1 passes through the left-handed cholesteric liquid crystal film layer 2 and becomes all right-handed polarized light, so that all of the light (right-handed polarized light) is reflected by the right-handed cholesteric liquid crystal layer and cannot be penetrated.
  • the liquid crystal display device exhibits a dark state.
  • FIG. 1 A schematic diagram of the liquid crystal display device of the present embodiment in a bright state is shown in FIG. 1
  • the right-handed cholesteric liquid crystal layer 4 corresponding to a certain pixel unit is powered by, for example, a pixel electrode and a common electrode, and the right-handed cholesteric liquid crystal is converted into a vertical directional direction, which is equivalent to the VA mode sputum
  • the light emitted from the backlight 1 passes through the left-handed ⁇ ⁇ ⁇ liquid crystal film layer 2 and all becomes right-handed polarized light, and the right-handed polarized light can be completely transmitted through the right-handed cholesteric liquid crystal layer 4 at this time, thereby realizing Bright display.
  • the TFT substrate 3 may include: a lower substrate 31 disposed adjacent to the first twisted cholesteric liquid crystal film layer 2 and an upper surface of the lower substrate 31. Pixel electrode layer 32.
  • the color filter substrate 5 may include: an upper substrate 53 and a color film layer 52 and a common electrode layer 51 which are sequentially formed on the lower surface of the upper substrate 53.
  • the upper surface, the surface facing the side facing the liquid crystal display device is the surface on the side facing away from the viewing surface of the liquid crystal display device, as shown in Fig. 1 or 2.
  • a film layer or structure having other functions such as an antireflection film or the like may be added to the liquid crystal display device as needed.
  • the liquid crystal display device of the above embodiment of the present invention does not need to use a polarizer for display, so that the transmittance of the display is greatly improved. Meanwhile, in the case where the reflective sheet is disposed, the light emitted by the backlight 1 can be reflected. Reuse, so that the light source efficiency is greatly improved, the panel brightness is strong, and energy is saved. In the manufacturing process of the liquid crystal display device of the embodiment of the present invention, since the alignment film and the orientation process are not required, the process steps and the production cost are saved.

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

Abstract

一种液晶显示装置，包括：背光源（1）；第一旋向胆甾液晶膜层（2），位于所述背光源（1）作为出光面一侧的上侧；阵列基板（3），位于所述第一旋向胆甾液晶膜层（2）上侧；彩膜基板（5），位于所述阵列基板（3）上侧；以及第二旋向胆甾液晶层（4），夹设于所述阵列基板（3）和彩膜基板（5）之间，所述第一旋向与所述第二旋向相反。该液晶显示装置增加了光效率，使得显示装置的透过率大大提高，节约了工艺步骤和生产成本。

Description

液晶显示装置 技术领域
本发明的实施例涉及一种液晶显示装置。 背景技术
胆甾液晶包含许多层， 每层内分子的排列方向相同， 但相邻两层内分子 的排列方向间稍有旋转， 夹角约 15分，逐层堆叠得到螺旋结构。 当上层分子 的排列相对于下层旋转了 360°时， 则该上层和该下层之间的距离为一个螺距 p。按螺旋的方向， 胆甾液晶又分为左旋胆甾液晶和右旋胆甾液晶， 分别能够 反射左旋圓偏光和右旋圓偏光。 胆甾液晶的反射遵从布拉格定律： λ=η*ρ ( η 为胆甾液晶的平均折射率， ρ 为胆甾液晶的螺距） 。 当胆甾液晶是由具有不 同螺距的一系列液晶的混合物物时， 其就有可能反射整个可见光的波长段。 胆甾液晶还具有双稳态性能， 即不加电时可以处于平面构向（施加高电压后） 或者焦推构向 （施加低电压后） ， 而加电时就会呈现竖直排列， 相当于普通 的 VA ( Vertical Alignment 竖直构向）模式液晶。 利用胆甾液晶的反射性能， 可以制作反射型偏光片； 再利用其双稳态性能， 又可以实现反射式液晶显示 以及透明显示。 发明内容
本发明的实施例希望提供一种釆用胆甾液晶的液晶显示装置。
本发明的一个方面提供了一种液晶显示装置， 包括： 背光源； 第一旋向 胆甾液晶膜层， 位于所述背光源作为出光面一侧的上侧； 阵列基板， 位于所 述第一旋向胆 液晶膜层上侧； 彩膜基板， 位于所述阵列基板上侧； 以及第 二旋向胆甾液晶层， 夹设于所述阵列基板和彩膜基板之间， 所述第一旋向与 所述第二旋向相反。
在该液晶显示装置之中， 例如， 所述背光源下侧设有反射面朝向所述第 一旋向胆<甾液晶膜层的反射片。
在该液晶显示装置之中， 例如， 所述第一旋向胆<甾液晶膜层为左旋胆甾 液晶膜层； 所述第二旋向胆 <甾液晶层为右旋胆 <甾液晶层。
或者， 在该液晶显示装置之中， 例如， 所述第一旋向胆<甾液晶膜层为右 旋胆 <甾液晶膜层； 所述第二旋向胆 <甾液晶层为左旋胆 <甾液晶层。
在该液晶显示装置之中， 例如， 所述阵列基板包括： 靠近所述第一旋向 胆甾液晶膜层设置的下基板以及位于所述下基板上表面的像素电极层。
在该液晶显示装置之中， 例如， 所述彩膜基板包括： 上基板以及依次制 作于所述上基板下表面的彩膜层和公共电极层。
本发明的实施例通过胆 液晶的反射性以及双稳态性能构成的液晶显示 装置具有以下优点： 显示器的透过率大大提高； 在设置反射片的情况下， 光 源效率可大大提高， 面板亮度强， 节约能源； 工艺步骤和生产成本得到减少。 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 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。
图 1为本发明实施例液晶显示器在暗态时的示意图；
图 2为本发明实施例液晶显示器在亮态时的示意图；
附图标记：
1 : 背光源； 2: 左旋胆甾液晶膜层； 3: 阵列基板； 31 : 下基板； 32: 像 素电极层； 4: 右旋胆甾液晶层； 5: 彩膜基板； 51 : 公共电极层； 52: 彩膜 层； 53: 上基板； 6: 反射片。 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。
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。 "包括" 或者 "包 含" 等类似的词语意指出现在 "包括" 或者 "包含" 前面的元件或者物件涵 盖出现在 "包括" 或者 "包含" 后面列举的元件或者物件及其等同， 并不排 除其他元件或者物件。 "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可能相应地改变。
本发明实施例的阵列基板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多个像素单元； 每个像素单元例如包括 作为开关元件的薄膜晶体管 （TFT )和用于控制液晶的排列的像素电极。 例 如， 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。
彩膜基板例如包括黑矩阵和位于由黑矩阵限定的多个像素单元中的多个 滤色片。 这些像素单元的滤色片例如包括红、 绿、 蓝色（RGB )滤色片， 这 些红、 绿、 蓝色像素单元以某种方式排列， 对应于阵列基板上的像素单元。 白光透射过这些彩色的滤色片后变为相应颜色的光， 用于彩色显示。 彩膜基 板还可以包括公共电极， 用于阵列基板上的像素单元中的像素电极配合以对 液晶施加电场。
下面的描述主要针对单个像素单元进行， 但是其他像素单元可以相同地 工作。
如图 1和图 2所示， 本实施例记载了一种液晶显示装置， 包括： 背光源 1 ; 第一旋向胆 <甾液晶膜层 2,位于所述背光源 1的出光面一侧； TFT基板 3 , 位于所述第一旋向胆 液晶膜层 2的上侧； 彩膜基板 5 , 位于所述 TFT基板 3上侧； 以及第二旋向胆甾液晶层 4, 夹设于所述 TFT基板 3和彩膜基板 5 之间。 TFT基板 3为阵列基板的一个示例。
在本实施例中 "上侧 "均为朝向液晶显示装置观看面的一侧， "下侧 "均 为背离液晶显示装置观看面的一侧， 如图 1或图 2所示。
在本实施例中， 所述背光源 1下侧设有反射面朝向所述第一旋向胆甾液 晶膜层 2的反射片 6, 即第一旋向胆甾液晶膜层 2和反射片 6夹着背光源 1 , 而彼此相对。 在本发明的其它实施例中， 在背光源 1的下册也可以不设置反 射片， 虽然不设置反射片的实施例的光源利用率会降低。 反射片 6例如是金 属片或者例如为表面上镀覆金属反射层的塑料片等。
在本实施例中， 所述第一旋向胆<甾液晶膜层 2为左旋胆<甾液晶膜层； 所 述第二旋向胆 <甾液晶层 4为右旋胆<甾液晶层。 在本发明的其它实施例中， 也 可以所述第一旋向胆 <甾液晶膜层 2为右旋胆<甾液晶膜层； 所述第二旋向胆甾 液晶层 4为左旋胆<甾液晶层。 例如， 这些左旋胆 <甾液晶和右旋胆<甾液晶可以 釆用本领域中已知的液晶材料， 这里不再赘述。
背光源 1 可以为直下式或侧照射式背光源， 例如釆用冷阴极荧光灯
( CCFL )或发光二极管 （LED )作为光源。
工作时， 由背光源 1发出的光包括左旋偏光和右旋偏光。 根据胆 <甾液晶 的反射特性， 左旋胆 <甾液晶膜反射左旋偏光， 而透过右旋偏光； 右旋胆甾液 晶膜反射右旋偏光， 而透过左旋偏光。 因此， 对于图 1所示的实施例， 背光 源 1发出的光在经过左旋胆 <甾液晶膜层 2后只有右旋光透过， 而左旋偏光被 反射， 即仅有一半光透过， 另外一半被左旋胆 <甾液晶膜层 2反射。 被反射的 左旋偏光在反射片 6处^!射后返回所述左旋胆 <甾液晶膜层 2; 因为左旋偏 光在反射后变为右旋偏光， 而变得可以透过左旋胆<甾液晶膜层 2。 因此， 在 设置有反射片 6的情况下， 从背光源 1发出的光将以右旋偏光的形式从左旋 胆<甾液晶膜层 2全部通过。
本实施例液晶显示装置在暗态时的示意图如图 1所示。
在暗态时， 对应于某一像素单元的右旋胆 液晶层 4处于双稳态之一的 平面构向， 将反射右旋偏光。 如前面所述， 从背光源 1发出的光经过左旋胆 甾液晶膜层 2后全部变成右旋偏光， 因此此时所有光（右旋偏光）都会被右 旋的胆 液晶层反射而无法透过， 液晶显示装置呈现暗态。
本实施例液晶显示装置在亮态时的示意图如图 2所示。
在亮态时， 通过例如像素电极和公共电极向对应于某一像素单元的右旋 胆甾液晶层 4加电， 该右旋胆甾液晶转变为垂直构向， 相当于 VA模式的排 歹 |J。 如前面所述， 从背光源 1发出的光经过左旋胆 <甾液晶膜层 2后全部变成 右旋偏光， 该右旋偏光此时将可以全部透过右旋胆 液晶层 4, 从而实现了 亮态显示。
本实施例中， 如图 1和图 2所示， 所述 TFT基板 3可以包括： 靠近所述 第一旋向胆甾液晶膜层 2设置的下基板 31以及位于所述下基板 31上表面的 像素电极层 32。
所述彩膜基板 5可以包括： 上基板 53以及依次制作于所述上基板 53下 表面的彩膜层 52和公共电极层 51。
在本实施例中 "上表面，，为朝向液晶显示装置观看面的一侧的表面， "下 表面，，均为背离液晶显示装置观看面的一侧的表面， 如图 1或 2所示。
在本发明的其它实施例中， 也可以根据需要在液晶显示装置中添加具有 其它功能的膜层或结构， 例如增透膜等。
本发明的上述实施例的液晶显示装置不需要使用偏光片以进行显示， 使 得显示器的透过率大大提高； 同时， 在设置反射片的情况下， 背光源 1发出 的光被反射后还可以被重新利用， 从而光源效率大大提高， 面板亮度强， 节 约能源； 本发明的实施例的液晶显示装置的制作过程中， 由于不需要配向膜 和定向工艺， 从而节约了工艺步骤和生产成本。
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、 一种液晶显示装置， 包括：
背光源；
第一旋向胆 <甾液晶膜层， 位于所述背光源作为出光面一侧的上侧； 阵列基板， 位于所述第一旋向胆 液晶膜层上侧；
彩膜基板， 位于所述阵列基板上侧； 以及
第二旋向胆甾液晶层， 夹设于所述阵列基板和彩膜基板之间， 所述第一 旋向与所述第二旋向相反。
2、如权利要求 1所述的液晶显示装置， 其中， 所述背光源下侧设有反射 面朝向所述第一旋向胆甾液晶膜层的反射片。
3、如权利要求 1或 2所述的液晶显示装置， 其中， 所述第一旋向胆甾液 晶膜层为左旋胆<甾液晶膜层； 所述第二旋向胆<甾液晶层为右旋胆 <甾液晶层。
4、如权利要求 1或 2所述的液晶显示装置， 其中， 所述第一旋向胆甾液 晶膜层为右旋胆<甾液晶膜层； 所述第二旋向胆<甾液晶层为左旋胆 <甾液晶层。
5、如权利要求 1-4任一所述的液晶显示装置，其中，所述阵列基板包括： 靠近所述第一旋向胆甾液晶膜层设置的下基板以及位于所述下基板上表面的 像素电极层。
6、如权利要求 1-5任一所述的液晶显示装置，其中，所述彩膜基板包括： 上基板以及依次制作于所述上基板下表面的彩膜层和公共电极层。
PCT/CN2012/084117 2012-07-20 2012-11-06 液晶显示装置 Ceased WO2014012307A1 (zh)

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