WO2013060039A1 - 多域垂直配向液晶显示面板 - Google Patents

多域垂直配向液晶显示面板 Download PDF

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Publication number
WO2013060039A1
WO2013060039A1 PCT/CN2011/081717 CN2011081717W WO2013060039A1 WO 2013060039 A1 WO2013060039 A1 WO 2013060039A1 CN 2011081717 W CN2011081717 W CN 2011081717W WO 2013060039 A1 WO2013060039 A1 WO 2013060039A1
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Prior art keywords
substrate
liquid crystal
protrusion
vertical alignment
display panel
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PCT/CN2011/081717
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English (en)
French (fr)
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李佳育
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深圳市华星光电技术有限公司
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Priority to US13/376,193 priority Critical patent/US8547512B2/en
Publication of WO2013060039A1 publication Critical patent/WO2013060039A1/zh

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    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1337Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1337Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133769Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers comprising an active, e.g. switchable, alignment layer

Definitions

  • the present invention relates to a display device, and more particularly to a multi-domain vertical alignment (Multi-domain Vertical) Alignment, MVA) LCD panel.
  • MVA Multi-domain Vertical Alignment
  • the LED backlight control circuit of the display device in the prior art comprises: a power module, a plurality of LED light strings, a switch control module and a switch tube.
  • the power module provides power for a plurality of LED light strings, and the switch tubes respectively Each LED string is connected.
  • the switch control module controls the current of each LED string by controlling the gate voltage of each switch tube, so that the currents of the LED strings are the same, and the brightness of each LED string is the same.
  • LCD liquid crystal display
  • CTR cathode ray tube
  • liquid crystal displays mainly have Twist Nematic liquid crystal displays and plane switching (In-plane). Switching, IPS) LCD display and Vertical Alignment LCD display.
  • the vertical alignment liquid crystal display panel 100 includes an upper substrate 110 and a lower substrate 120. And a liquid crystal layer 130 interposed between the upper and lower substrates.
  • the upper substrate 110 includes a glass substrate 111, an electrode layer 112, an alignment film 113, and a polarizer 114.
  • Lower substrate The 120 also includes a glass substrate 121, an electrode layer 122, an alignment film 123, and a polarizer 124.
  • the upper substrate 110 can be a color filter substrate, and further disposed with a color filter (not shown).
  • the electrode layer 112 in the upper substrate 110 is a common electrode layer which is made of a transparent conductive material (for example, ITO or IZO).
  • Lower substrate 120 The thin film transistor substrate may further be provided with a thin film transistor array (not shown), and the electrode layer 122 disposed on the lower substrate 120 a pixel electrode layer including a plurality of pixel electrodes for controlling respectively using corresponding thin film transistors in the thin film transistor array, and respectively adopting a transparent conductive material (for example, ITO or IZO) And made.
  • the polarizing plate 114 on the upper substrate 110 and the polarizing plate 124 disposed on the lower substrate 120 are perpendicular to each other, that is, the polarizing directions are different by 90 degrees.
  • the liquid crystal molecules in the liquid crystal layer 130 are negative-type liquid crystal molecules, that is, their ⁇ ⁇ is less than 0. Therefore, the vertical alignment liquid crystal display panel 110
  • the alignment film 113 on the upper substrate 110 and the alignment film 123 disposed on the lower substrate 120 cause the liquid crystal molecules in the liquid crystal layer 130 to be perpendicular to the upper substrate 110 and the lower substrate in a dark state. 120.
  • the prior art develops a multi-domain segmentation technology based on the vertical alignment liquid crystal display panel, which divides the display panel into a plurality of fields, so that the liquid crystal molecules in the liquid crystal layer have many A dumping direction to overcome the above problems.
  • FIG. 2 shows the existing Multi-domain Vertical Alignment (MVA).
  • MVA Multi-domain Vertical Alignment
  • FIG. 2 A schematic diagram of a liquid crystal display panel.
  • the existing multi-domain vertical alignment liquid crystal display panel 200 is in the existing vertical alignment liquid crystal display panel (the vertical alignment liquid crystal display panel shown in FIG. 1).
  • At least one protrusion 217 is disposed on the color filter substrate 210 of 100), and the protrusion 217 is disposed such that liquid crystal molecules in the vicinity thereof are along the protrusion 217
  • the surface shape exhibits a corresponding tilting state, and the liquid crystal molecules in the liquid crystal layer 230 are arranged in multiple directions to achieve the effect of multi-domain segmentation.
  • the protrusions 217 When the existing multi-domain vertical alignment liquid crystal display panel 200 is in a dark state (i.e., displays L0 gray scale), the protrusions 217 The arrangement also causes the liquid crystal molecules in the vicinity to assume a corresponding tilting state, so that the light will deflect when passing through the liquid crystal molecules, so that the deflected light will have the color filter substrate 210.
  • the portion of the light in the polarizing direction of the polarizer is uniform, and the light portion passes through the multi-domain vertical alignment liquid crystal display panel. 200, causing light leakage problems. Therefore, in order to improve the light leakage problem, it is urgent to develop a new liquid crystal display panel.
  • the invention provides a multi-domain vertical alignment liquid crystal display panel, which can reduce light leakage.
  • the technical solution adopted by the present invention is to provide a multi-domain vertical alignment liquid crystal display panel, the multi-domain vertical alignment liquid crystal panel includes: a first substrate; a second substrate opposite to the first substrate; and a liquid crystal layer, Provided between the first substrate and the second substrate; at least one protrusion, The protrusion is a protrusion of a piezoelectric crystal material disposed in the first substrate; and at least one recessed portion On one of the first substrate and the second substrate, and the recess is disposed around the protrusion; wherein, when no voltage is applied, a lower surface of the protrusion is at the same horizontal line as a lower surface of the first substrate, Thereby, a dark state is displayed; and when a voltage is applied, the protrusion protrudes outward so that the lower surface of the protrusion protrudes from the lower surface of the first substrate, thereby displaying a bright state.
  • the first substrate is a color filter substrate
  • the second substrate is a thin film transistor substrate.
  • the first substrate comprises: a first transparent substrate; a common electrode layer disposed on an inner side of the first transparent substrate; a first alignment film disposed on the common electrode layer; and a first polarizer disposed on the first substrate The outer side of the first transparent substrate.
  • the second substrate comprises: a second transparent substrate; a pixel electrode layer disposed on the inner side of the second transparent substrate; a first alignment film disposed on the pixel electrode layer; and a second polarizer disposed on the second substrate The outer side of the second transparent substrate.
  • the polarization direction of the first polarizer and the polarization direction of the second polarizer are perpendicular to each other.
  • the first alignment film and the second alignment film cooperate to make liquid crystal molecules in the liquid crystal layer perpendicular to the first substrate and the second substrate when displaying a dark state.
  • the liquid crystal molecules in the liquid crystal layer are negative liquid crystal molecules.
  • a multi-domain vertical alignment liquid crystal display panel the multi-domain vertical alignment liquid crystal panel includes: a first substrate; a second substrate opposite to the first substrate; and a liquid crystal layer
  • the liquid crystal molecules in the liquid crystal layer are negative liquid crystal molecules disposed between the first substrate and the second substrate; at least one protrusion is disposed in the first substrate; and at least one recess is disposed in the One of the first substrate and the second substrate, and the recess is disposed around the protrusion; wherein, when the dark state is displayed, the lower surface of the protrusion is at the same horizontal line as the lower surface of the first substrate; When the bright state is displayed, the protrusion protrudes outward to cause the lower surface of the protrusion to protrude from the lower surface of the first substrate.
  • a multi-domain vertical alignment liquid crystal display panel including a first substrate, a second substrate, a liquid crystal layer, and at least one protrusion.
  • the second substrate is opposite to the first substrate.
  • the liquid crystal layer is disposed between the first substrate and the second substrate, and the protrusion is disposed in the first substrate.
  • the protrusion is a protrusion of the piezoelectric crystal material, so that when no voltage is applied, the lower surface of the protrusion is at the same horizontal line as the lower surface of the first substrate, thereby displaying a dark state; and when a voltage is applied The protrusion protrudes outward such that the lower surface of the protrusion protrudes from the lower surface of the first substrate to display a bright state.
  • At least one recess is disposed on one of the first substrate and the second substrate, and the recess is disposed around the protrusion.
  • the first substrate is a color filter substrate
  • the second substrate is a thin film transistor substrate.
  • the first substrate comprises a first transparent substrate, a common electrode layer, a first alignment film, and a first polarizer.
  • the common electrode layer is disposed on the inner side of the first transparent substrate
  • the first alignment film is disposed on the common electrode layer
  • the first polarizer is disposed on the outer side of the first transparent substrate.
  • the second substrate comprises a second transparent substrate, a pixel electrode layer, a first alignment film, and a second polarizer.
  • the pixel electrode layer is disposed on the inner side of the second transparent substrate
  • the first alignment film is disposed on the pixel electrode layer
  • the second polarizer is disposed on the outer side of the second transparent substrate.
  • the polarization direction of the first polarizer and the polarization direction of the second polarizer are perpendicular to each other.
  • the first alignment film and the second alignment film cooperate to make liquid crystal molecules in the liquid crystal layer perpendicular to the first substrate and the second substrate when displaying a dark state.
  • the common electrode layer and the pixel electrode layer are made of a transparent conductive material.
  • the liquid crystal molecules in the liquid crystal layer are negative liquid crystal molecules.
  • the multi-domain vertical alignment liquid crystal display panel of the present invention displays the dark state, the protrusions are not deformed, and the arrangement of the protrusions does not affect the liquid crystal molecules in the liquid crystal layer, so that no light leakage occurs; In the state, the protrusions are deformed, so that the liquid crystal molecules in the liquid crystal layer exhibit different tilting directions to generate a plurality of fields, thereby achieving the effect of multi-domain segmentation. Therefore, the multi-domain vertical alignment liquid crystal display panel of the present invention can reduce the occurrence of light leakage.
  • FIG. 1 is a schematic view of a conventional vertical alignment liquid crystal display panel.
  • Figure 2 shows the existing Multi-domain Vertical Alignment (MVA).
  • VAA Multi-domain Vertical Alignment
  • FIG. 3 is a schematic diagram of a multi-domain vertical alignment liquid crystal display panel according to a preferred embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing the working principle of the multi-domain vertical alignment liquid crystal display panel shown in FIG. 3.
  • FIG. 3 is a schematic diagram of a multi-domain vertical alignment liquid crystal display panel according to a preferred embodiment of the present invention.
  • the multi-domain vertical alignment liquid crystal display panel 300 of the present invention includes a first substrate 310, a second substrate 320, and a liquid crystal layer 330 interposed between the substrates.
  • the first substrate 310 may be a color filter substrate including a transparent substrate 311, a common electrode layer 312, and an alignment film 313. And polarizer 314.
  • the transparent substrate 311 may be a glass substrate.
  • the common electrode layer 312 and the alignment film 313 are sequentially disposed inside the transparent substrate 311 to face the liquid crystal layer 330
  • the polarizer 314 is disposed outside the transparent substrate 311.
  • the common electrode layer 312 can be made of a transparent conductive material (for example, ITO or IZO material). And made.
  • the first substrate 310 is further provided with a color filter (not shown).
  • the second substrate 320 may be a thin film transistor substrate including a transparent substrate 321 , a pixel electrode layer 322 , and an alignment film 323 .
  • polarizer 324 the transparent substrate 321 can also be a glass substrate.
  • the pixel electrode layer 322 and the alignment film 323 are sequentially disposed inside the transparent substrate 321 to face the liquid crystal layer 320.
  • the polarizer 324 is disposed outside the transparent substrate 321 .
  • the pixel electrode layer 322 may include a plurality of pixel electrodes (not labeled) which are respectively made of a transparent conductive material (for example, ITO or Made of IZO material).
  • a thin film transistor array is further disposed on the second substrate 320 (not shown). These pixel electrodes are respectively controlled by corresponding thin film transistors in the thin film transistor array.
  • the liquid crystal molecules in the liquid crystal layer 330 are negative-type liquid crystal molecules, that is, their ⁇ ⁇ is less than 0.
  • the alignment film in the first substrate 310 313 and the alignment film 323 in the lower substrate 320 are coupled to each other such that the liquid crystal molecules in the liquid crystal layer 330 are perpendicular to the first substrate 310 and the second substrate in a dark state (ie, when not in operation). 320.
  • a polarizer 314 in the first substrate 310 and a polarizer 324 in the second substrate 320 The directions of polarization are perpendicular to each other, that is, the direction of polarization is 90 degrees.
  • the multi-domain vertical alignment liquid crystal display panel 300 of the present invention further includes at least one protrusion 340 disposed on the first substrate Among 310.
  • the protrusions 340 may be made of a piezoelectric crystal material which may cause a shape change due to application of a voltage.
  • FIG. 4 is Figure 3 A schematic diagram of the operation of the multi-domain vertical alignment liquid crystal display panel shown.
  • FIG. 4 only shows the necessary elements of the present invention, and the remaining components are omitted, wherein FIG. 4(a) The schematic diagram of the multi-domain vertical alignment liquid crystal display panel of the present invention when displaying a dark state, and FIGS. 4(b)-4(c) are schematic diagrams of the multi-domain vertical alignment liquid crystal display panel of the present invention when displaying a bright state.
  • the protrusions 340 can be A small voltage is applied to the protrusion 340 to produce a protrusion with a small degree of protrusion, as shown in Fig. 4(b).
  • the protrusions can be A large voltage is applied to the 340 so that the shape of the protrusion 340 produces a protrusion with a large degree of protrusion, as shown in Fig. 4(c). Therefore, the present invention can be achieved by the pair of protrusions 340 Different voltages are applied so that the protrusions 340 produce different degrees of protrusions for optimal display.
  • protrusions 340 of the present invention may be used as long as it causes the lower surface of the protrusion 340 and the first substrate 310 when the multi-domain vertical alignment liquid crystal display panel displays a dark state.
  • the lower surface is at the same horizontal line; and when the bright state is displayed, the protrusion 340 may be deformed in a certain manner so that the lower surface of the protrusion 340 protrudes from the lower surface of the first substrate 310.
  • FIG. 5 is a schematic diagram of a multi-domain vertical alignment liquid crystal display panel according to another preferred embodiment of the present invention.
  • the multi-domain vertical alignment liquid crystal display panel 500 of the present embodiment is similar to the multi-domain vertical alignment liquid crystal display panel 300 shown in FIG. 3-4, and also includes a first substrate 510 as a color filter substrate.
  • a second substrate 520 as a thin film transistor substrate, and a liquid crystal layer 530 interposed between the two substrates.
  • At least one protrusion 540 is also disposed on the first substrate 510. It can be made of a piezoelectric crystal material to cause a shape change by applying a voltage.
  • the second substrate 520 is further provided with at least one recess 550, which can surround the protrusion 540.
  • the recess 550 can cooperate with the protrusions 540, so that the liquid crystal molecules in the liquid crystal layer 530 are arranged in multiple directions to achieve multi-domain segmentation.
  • the second substrate 520 is a thin film transistor substrate, so each pixel thereof includes a separate thin-film transistor (TFT).
  • TFT thin-film transistor
  • the pixel electrode, the independent thin film transistor and the pixel electrode cause the surface of the second substrate 520 to be uneven, thereby forming the recess 550.
  • the recess 550 may also be disposed on the first substrate 510, which cooperates with the protrusions 540 provided on the first substrate 510 to achieve the multi-domain segmentation effect of the liquid crystal molecules in the liquid crystal layer 530.
  • the multi-domain vertical alignment liquid crystal display panel of the present invention does not deform when the protrusions are displayed in the dark state, and the arrangement of the protrusions does not affect the liquid crystal molecules in the liquid crystal layer, so that no light leakage occurs.
  • the protrusions are deformed, so that the liquid crystal molecules in the liquid crystal layer exhibit different tilting directions to generate a plurality of fields to achieve the multi-domain segmentation effect. Therefore, the multi-domain vertical alignment liquid crystal display panel of the present invention can overcome the defects existing in the prior art and avoid the occurrence of light leakage.

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  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
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Abstract

一种多域垂直配向液晶显示面板(300),其包括第一基板(310)、第二基板(320)、液晶层(330)以及至少一个突起物(340)。该第二基板(320)与该第一基板(310)相对,该液晶层(330)设置在该第一基板(310)与该第二基板(320)之间,而该突起物(340)设置在该第一基板(310)之中。其中,在显示暗态时,该突起物(340)的下表面与该第一基板(310)的下表面处于同一水平线;而在显示亮态时,该突起物(340)向外突起以使该突起物(340)的该下表面从该第一基板(310)的该下表面突出。在显示暗态时,突起物(340)不发生形变,突起物(340)的设置不会影响液晶层(330)中的液晶分子排列方向,从而避免了漏光现象的发生。

Description

多域垂直配向液晶显示面板
【技术领域】
本发明涉及一种显示装置,特别是涉及一种多域垂直配向 (Multi-domain Vertical Alignment, MVA) 液晶显示面板。
【背景技术】
近几年,显示技术发展迅速,成为人们研究的热点。现有技术中显示装置的LED背光控制电路包括:电源模块、多个LED灯串、开关控制模块以及开关管。其中,电源模块为多个LED灯串提供电源,开关管分别与 各LED灯串连接。开关控制模块通过控制各开关管的栅极电压来控制各个LED灯串的电流,以使各LED灯串的电流相同,进而使得各LED灯串的亮度相同。
然而,现有技术中,由于开关管工作在阻抗较大的工作区,有较大的电压加在开关管上,进而造成开关管的损耗较大,浪费能源,并产生多余热量,造成产品温升过高而影响产品稳定性等问题。
因此,需要提供一种改进的LED背光驱动电路以及显示装置,以解决上述问题。
平面显示装置,例如液晶显示装置 (liquid crystal display, LCD) 具有轻薄、节能、无辐射等诸多优点,因此其已经逐渐取代传统的阴极射线管 (cathode ray tube, CRT) 显示装置,成为显示装置的主流。目前液晶显示装置已经广泛地应用在数字电视、计算机、个人数字助理、移动电话以及数码相机等各类电子设备中。
目前,液晶显示器主要有扭曲向列 (Twist Nematic) 液晶显示器、平面切换 (In-plane Switching, IPS) 液晶显示器以及垂直配向 (Vertical Alignment) 液晶显示器。
图 1 为现有的垂直配向液晶显示面板的示意图,其中, (a) 为垂直配向液晶显示面板在暗态时的示意图, (b) 为垂直配向液晶显示面板在亮态时的示意图。如图 1 所示,垂直配向液晶显示面板 100 包括上基板 110 、下基板 120 、以及夹设在上、下基板间的液晶层 130 。其中,上基板 110 包括玻璃基板 111 、电极层 112 、配向膜 113 以及偏光片 114 。而下基板 120 也包括玻璃基板 121 、电极层 122 、配向膜 123 以及偏光片 124 。
本领域技术人员可以理解的是,上基板 110 可为彩色滤光片基板,其上进一步设置有彩色滤光片 ( 图未示 ) ,且上基板 110 中的电极层 112 为公共电极层,其采用透明导电材料 ( 例如, ITO 或者 IZO) 而制成。而下基板 120 可为薄膜晶体管基板,其上进一步设置有薄膜晶体管阵列 ( 图未示 ) ,且下基板 120 上所设置的电极层 122 为像素电极层,其包括多个像素电极以分别利用薄膜晶体管阵列中对应的薄膜晶体管而进行控制,且其分别采用透明导电材料 ( 例如, ITO 或者 IZO) 而制成。此外,上基板 110 上的偏光片 114 ,与下基板 120 上所设置的偏光片 124 的偏光方向相互垂直,即其偏光方向相差 90 度。
液晶层 130 中的液晶分子为负型的液晶分子,即其△ε小于 0 。因此,垂直配向液晶显示面板 110 利用上基板 110 上的配向膜 113 ,以及下基板 120 上所设置的配向膜 123 ,使液晶层 130 中的液晶分子在暗态时垂直于上基板 110 和下基板 120 。
在未施加电压至电极层 112 与电极层 122 之间时,液晶层 130 中的液晶分子不发生偏转,由于偏光片 114 与偏光片 124 之间的偏光方向相互垂直,因此,光线不能穿过垂直配向液晶显示面板 100 ,其处于暗态状态,如图 1(a) 所示。
而当施加电压至电极层 112 与电极层 122 之间时,液晶层 130 中的液晶分子发生偏转,从而使光线发生偏转,因此光线可以穿过垂直配向液晶显示面板,其处于亮态状态,如图 1(b) 所示。
为了避免灰阶反转 (Gray Level Inversion) 以及斜向视角对比度太小的问题,现有技术在垂直配向液晶显示面板的基础上发展出一种多域分割技术,其将显示面板分成多个场域,使得液晶层中的液晶分子具有多个倾倒方向,以克服上述问题。
图 2 为现有的多域垂直配向 (Multi-domain Vertical Alignment, MVA) 液晶显示面板的示意图。如图 2 所示,现有的多域垂直配向液晶显示面板 200 是在现有的垂直配向液晶显示面板 ( 如图 1 所示的垂直配向液晶显示面板 100) 的彩色滤光基板 210 上设置至少一个突起物 217 ,利用突起物 217 的设置从而使得其附近的液晶分子沿着突起物 217 的表面形状而呈现对应的倾倒状态,则液晶层 230 中的液晶分子呈多方向排列,以达到多域分割的效果。
但是,现有的多域垂直配向液晶显示面板 200 在暗态 ( 即显示 L0 灰阶 ) 时,突起物 217 的设置同样会使其附近的液晶分子呈现对应的倾倒状态,因此光线在经过这些液晶分子时会进行偏转,因此偏转的光线会具有与彩色滤光基板 210 上的偏光片的偏光方向一致的光线部分,则这些光线部分会穿过多域垂直配向液晶显示面板 200,造成漏光问题。因此,为了改善漏光问题,迫切需要发展出新的液晶显示面板。
【发明内容】
本发明提供一种多域垂直配向液晶显示面板,能够降低漏光现象。
本发明为解决技术问题采用的技术方案是:提供一种多域垂直配向液晶显示面板,该多域垂直配向液晶面板包括:第一基板;第二基板,与该第一基板相对;液晶层,设置在该第一基板与该第二基板之间;至少一个突起物, 该突起物为压电晶体材料的突起物, 设置在该第一基板之中;以及 至少一凹陷设置 在该第一基板和该第二基板其中之一上,且该凹陷围绕该突起物设置;其中,在未施加电压时,该突起物的下表面与该第一基板的下表面处于同一水平线,从而显示暗态;而在施加电压时,该突起物向外突起以使该突起物的该下表面从该第一基板的该下表面突出,从而显示亮态。
优选地,施加电压越大,该突起物的突起程度越大。
优选地,该第一基板为彩色滤光片基板,而该第二基板为薄膜晶体管基板。
优选地,该第一基板包括:第一透明基板;公共电极层,设置于该第一透明基板的内侧;第一配向膜,设置于该公共电极层之上;以及第一偏光片,设置于该第一透明基板的外侧。
优选地,该第二基板包括:第二透明基板;像素电极层,设置于该第二透明基板的内侧;第一配向膜,设置于该像素电极层之上;以及第二偏光片,设置于该第二透明基板的外侧。
优选地,该第一偏光片的偏振方向与该第二偏光片的偏振方向相互垂直。
优选地,该第一配向膜和该第二配向膜配合以使该液晶层中的液晶分子在显示暗态时垂直于该第一基板和该第二基板。
优选地,该液晶层中的液晶分子为负型的液晶分子。
本发明为解决技术问题采用的另一技术方案是:一种多域垂直配向液晶显示面板,该多域垂直配向液晶面板包括:第一基板;第二基板,与该第一基板相对;液晶层,该液晶层中的液晶分子为负型的液晶分子,设置在该第一基板与该第二基板之间;至少一个突起物,设置在该第一基板之中;以及至少一凹陷设置在该第一基板和该第二基板其中之一上,且该凹陷围绕该突起物设置;其中,在显示暗态时,该突起物的下表面与该第一基板的下表面处于同一水平线;而在显示亮态时,该突起物向外突起以使该突起物的该下表面从该第一基板的该下表面突出。
本发明为解决技术问题采用的另一技术方案是:提供一种多域垂直配向液晶显示面板,其包括第一基板、第二基板、液晶层以及至少一个突起物。该第二基板与该第一基板相对,该液晶层设置在该第一基板与该第二基板之间,而该突起物设置在该第一基板之中。其中,在显示暗态时,该突起物的下表面与该第一基板的下表面处于同一水平线;而在显示亮态时,该突起物向外突起以使该突起物的该下表面从该第一基板的该下表面突出。
优选地,该突起物为压电晶体材料的突起物,以在未施加电压时,该突起物的下表面与该第一基板的下表面处于同一水平线,从而显示暗态;而在施加电压时,该突起物向外突起以使该突起物的该下表面从该第一基板的该下表面突出,从而显示亮态。
优选地,施加电压越大,该突起物的突起程度越大。
优选地,至少一凹陷设置在该第一基板和该第二基板其中之一上,且该凹陷围绕该突起物设置。
优选地,该第一基板为彩色滤光片基板,而该第二基板为薄膜晶体管基板。
优选地,该第一基板包括第一透明基板、公共电极层、第一配向膜以及第一偏光片。该公共电极层设置于该第一透明基板的内侧,该第一配向膜设置于该公共电极层之上,而该第一偏光片设置于该第一透明基板的外侧。
优选地,该第二基板包括第二透明基板、像素电极层、第一配向膜以及第二偏光片。该像素电极层设置于该第二透明基板的内侧,该第一配向膜设置于该像素电极层之上,而该第二偏光片设置于该第二透明基板的外侧。
优选地,该第一偏光片的偏振方向与该第二偏光片的偏振方向相互垂直。
优选地,该第一配向膜和该第二配向膜配合以使该液晶层中的液晶分子在显示暗态时垂直于该第一基板和该第二基板。
优选地,该公共电极层与该像素电极层采用透明导电材料而制成。
优选地,该液晶层中的液晶分子为负型的液晶分子。
本发明的多域垂直配向液晶显示面板在显示暗态时,其突起物不发生形变,则突起物的设置不会影响液晶层中的液晶分子,因此并不会产生漏光现象;而在显示亮态时,其突起物会产生形变,从而使得液晶层中的液晶分子呈现不同的倾倒方向,以产生多个场域,达到多域分割的效果。因此,本发明的多域垂直配向液晶显示面板可降低漏光现象的发生。
【附图说明】
图 1 为现有的垂直配向液晶显示面板的示意图。
图 2 为现有的多域垂直配向 (Multi-domain Vertical Alignment, MVA) 液晶显示面板的示意图。
图 3 为本发明一较佳实施例所揭示的多域垂直配向液晶显示面板的示意图。
图 4 为图 3 所示的多域垂直配向液晶显示面板的工作原理的示意图。
【具体实施方式】
为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下结合附图及较佳实施例,对依据本发明提出的多域垂直配向液晶显示面板其具体实施方式、方法、步骤、结构、特征及其功效,详细说明如下。有关本发明的前述及其他技术内容、特点及功效 , 在以下配合参考图式的较佳实施例的详细说明中将可清楚呈现。通过具体实施方式的说明,当可对本发明为达成预定目的所采取的技术手段及功效得以更加深入且具体的了解,然而所附图式仅是提供参考与说明之用,并非用来对本发明加以限制。
图 3 为本发明一较佳实施例所揭示的多域垂直配向液晶显示面板的示意图。如图 3 所示,本发明的多域垂直配向液晶显示面板 300 包括第一基板 310 、第二基板 320 、以及夹设在两基板之间的液晶层 330 。
第一基板 310 可为彩色滤光片基板,其包括透明基板 311 、公共电极层 312 、配向膜 313 以及偏光片 314 。其中,透明基板 311 可采用玻璃基板。公共电极层 312 和配向膜 313 依次设置在透明基板 311 的内侧,以正对液晶层 330 ,而偏光片 314 设置在透明基板 311 的外侧。公共电极层 312 可采用透明导电材料 ( 例如, ITO 或者 IZO 材料 ) 而制成。此外,本领域技术人员可以理解的是,第一基板 310 上还进一步设置有彩色滤光片 ( 图未示 ) 。
第二基板 320 可为薄膜晶体管基板,其包括透明基板 321 、像素电极层 322 、配向膜 323 以及偏光片 324 。其中,透明基板 321 也可采用玻璃基板。像素电极层 322 和配向膜 323 依次设置在透明基板 321 的内侧,以正对液晶层 320 ,而偏光片 324 设置在透明基板 321 的外侧。像素电极层 322 可包括多个像素电极 ( 未标识 ) ,其分别采用透明导电材料 ( 例如, ITO 或者 IZO 材料 ) 而制成。此外,本领域技术人员可以理解的是,第二基板 320 上还进一步设置薄膜晶体管阵列 ( 图未示 ) ,则这些像素电极分别利用薄膜晶体管阵列中对应的薄膜晶体管而进行控制。
液晶层 330 中的液晶分子为负型的液晶分子,即其△ε小于 0 。此外,第一基板 310 中的配向膜 313 和下基板 320 中的配向膜 323 相互配合,从而使液晶层 330 中的液晶分子在暗态时 ( 即未工作时 ) 垂直于第一基板 310 和第二基板 320 。
第一基板 310 中的偏光片 314 ,与第二基板 320 中的偏光片 324 的偏光方向相互垂直,即其偏光方向相差 90 度。
另,本发明的多域垂直配向液晶显示面板 300 还进一步包括至少一个突起物 340 ,其设置在第一基板 310 之中。优选地,突起物 340 可采用压电晶体材料而制成,其会由于施加电压而产生形状变化。
以下将具体地介绍本发明的多域垂直配向液晶显示面板的工作原理。图 4 为图 3 所示的多域垂直配向液晶显示面板的工作原理的示意图。为了方便介绍,图 4 仅仅示出了本发明的必要元件,而省略了其余的元件,其中图 4(a) 为本发明的多域垂直配向液晶显示面板在显示暗态时的示意图,而图 4(b)-4(c) 为本发明的多域垂直配向液晶显示面板在显示亮态时的示意图。
如图 4(a) 所示,在显示暗态时,突起物 340 上未施加电压,因此突起物 340 并不会产生形状变化,则突起物 340 的下表面会和第一基板 310 的下表面处于同一水平面,则突起物 340 的设置并不会对液晶层 330 中的液晶分子产生任何的影响,因此并不会产生漏光现象。
如图 4(b)-4(c) 所示,在显示亮态时,突起物 340 上施加电压,因此突起物 340 会产生形状变化从而向外突起,以使突起物 340 的下表面从第一基板 310 的下表面突出,则由于突起物 340 的突起而使得附近的液晶分子呈现不同的倾倒状态,因此液晶层 330 中的液晶分子会具有多个倾倒方向,从而产生多个场域以达到多域分割的效果。
此外,由于突起物 340 是采用压电晶体材料而制成,其突起程度会随着施加电压的增加而增大。因此,在显示中灰阶 (Middle Gray Level) 图像时,可对突起物 340 上施加较小的电压,使突起物 340 的形状产生较小突起程度的突起,如图 4(b) 所示。而在显示高灰阶 (High Gray Level) 图像时,可对突起物 340 上施加较大的电压,使突起物 340 的形状产生较大突起程度的突起,如图 4(c) 所示。因此,本发明可藉由对突起物 340 施加不同的电压,从而使突起物 340 产生不同程度的突起,以获得最佳的显示效果。
当然,本领域技术人员可以理解的是,本发明的突起物 340 也可以使用其它具有形变效果的材料,例如压力形变材料等等,只要其在多域垂直配向液晶显示面板显示暗态时,使突起物 340 的下表面与第一基板 310 的下表面处于同一水平线;而在显示亮态时,可利用一定的方式使突起物 340 产生形变使突起物 340 的下表面从第一基板 310 的下表面突出即可。
图 5 为本发明另一较佳实施例所揭示的多域垂直配向液晶显示面板的示意图。如图 5 所示,本实施的多域垂直配向液晶显示面板 500 与图 3-4 所示的多域垂直配向液晶显示面板 300 相似,其也包括作为彩色滤光片基板的第一基板 510 、作为薄膜晶体管基板的第二基板 520 、以及夹设在两基板之间的液晶层 530 。第一基板 510 上也设置有至少一个突起物 540 ,其可采用压电晶体材料而制成,从而利用施加电压而产生形状变化。
此外,在本实施例中,第二基板 520 上还设置有至少一凹陷 550 ,其可围绕突起物 540 而设置,则凹陷 550 可与突起物 540 相互配合,从而使液晶层 530 中的液晶分子呈多方向排列,达到多域分割的效果。本领域技术人员可以理解的是,第二基板 520 为薄膜晶体管基板,因此其每个像素分别包括独立的薄膜晶体管 (thin-film transistor, TFT) 以及像素电极,则独立的薄膜晶体管以及像素电极会使第二基板 520 的表面高低不平,从而形成凹陷 550 。另,本领域技术人员可以理解的是,凹陷 550 也可以设置在第一基板 510 上,其与第一基板 510 上设置的突起物 540 相互配合,以使液晶层 530 中的液晶分子达到多域分割的效果。
综上所述,本发明的多域垂直配向液晶显示面板在显示暗态时,其突起物不发生形变,则突起物的设置不会影响液晶层中的液晶分子,因此并不会产生漏光现象;而在显示亮态时,其突起物会产生形变,从而使得液晶层中的液晶分子呈现不同的倾倒方向,以产生多个场域,达到多域分割的效果。因此,本发明的多域垂直配向液晶显示面板可克服现有技术所存在的缺陷,避免漏光现象的发生。
虽然本发明已以实施例揭露如上,然其并非用以限定本发明,任何本发明所属技术领域的技术人员,在不脱离本发明的精神和范围内,当可作各种更动与润饰,因此本发明的保护范围当视所附的权利要求所界定者为准。

Claims (20)

  1. 一种多域垂直配向液晶显示面板,其特征在于:该多域垂直配向液晶面板包括:
    第一基板;
    第二基板,与该第一基板相对;
    液晶层,设置在该第一基板与该第二基板之间;
    至少一个突起物,该突起物为压电晶体材料的突起物,设置在该第一基板之中;以及
    至少一凹陷设置在该第一基板和该第二基板其中之一上,且该凹陷围绕该突起物设置;
    其中,在未施加电压时,该突起物的下表面与该第一基板的下表面处于同一水平线,从而显示暗态;而在施加电压时,该突起物向外突起以使该突起物的该下表面从该第一基板的该下表面突出,从而显示亮态。
  2. 根据权利要求 1 所述的多域垂直配向液晶显示面板,其特征在于:施加电压越大,该突起物的突起程度越大。
  3. 根据权利要求 1 所述的多域垂直配向液晶显示面板,其特征在于:该第一基板为彩色滤光片基板,而该第二基板为薄膜晶体管基板。
  4. 根据权利要求 3 所述的多域垂直配向液晶显示面板,其特征在于:该第一基板包括:
    第一透明基板;
    公共电极层,设置于该第一透明基板的内侧;
    第一配向膜,设置于该公共电极层之上;以及
    第一偏光片,设置于该第一透明基板的外侧。
  5. 根据权利要求 4 所述的多域垂直配向液晶显示面板,其特征在于:该第二基板包括:
    第二透明基板;
    像素电极层,设置于该第二透明基板的内侧;
    第一配向膜,设置于该像素电极层之上;以及
    第二偏光片,设置于该第二透明基板的外侧。
  6. 根据权利要求 5 所述的多域垂直配向液晶显示面板,其特征在于:该第一偏光片的偏振方向与该第二偏光片的偏振方向相互垂直。
  7. 根据权利要求 5 所述的多域垂直配向液晶显示面板,其特征在于:该第一配向膜和该第二配向膜配合以使该液晶层中的液晶分子在显示暗态时垂直于该第一基板和该第二基板。
  8. 根据权利要求 5 所述的多域垂直配向液晶显示面板,其特征在于:该液晶层中的液晶分子为负型的液晶分子。
  9. 一种多域垂直配向液晶显示面板,其特征在于:该多域垂直配向液晶面板包括:
    第一基板;
    第二基板,与该第一基板相对;
    液晶层,该液晶层中的液晶分子为负型的液晶分子,设置在该第一基板与该第二基板之间;
    至少一个突起物,设置在该第一基板之中;以及至少一凹陷设置在该第一基板和该第二基板其中之一上,且该凹陷围绕该突起物设置;
    其中,在显示暗态时,该突起物的下表面与该第一基板的下表面处于同一水平线;而在显示亮态时,该突起物向外突起以使该突起物的该下表面从该第一基板的该下表面突出。
  10. 一种多域垂直配向液晶显示面板,其特征在于:该多域垂直配向液晶面板包括:
    第一基板;
    第二基板,与该第一基板相对;
    液晶层,设置在该第一基板与该第二基板之间;
    至少一个突起物,设置在该第一基板之中;
    其中,在显示暗态时,该突起物的下表面与该第一基板的下表面处于同一水平线;而在显示亮态时,该突起物向外突起以使该突起物的该下表面从该第一基板的该下表面突出。
  11. 如权利要求 10 所述的多域垂直配向液晶显示面板,其特征在于:该突起物为压电晶体材料的突起物,以在未施加电压时,该突起物的下表面与该第一基板的下表面处于同一水平线,从而显示暗态;而在施加电压时,该突起物向外突起以使该突起物的该下表面从该第一基板的该下表面突出,从而显示亮态。
  12. 如权利要求 11 所述的多域垂直配向液晶显示面板,其特征在于:施加电压越大,该突起物的突起程度越大。
  13. 如权利要求 10 所述的多域垂直配向液晶显示面板,其特征在于:至少一凹陷设置在该第一基板和该第二基板其中之一上,且该凹陷围绕该突起物设置。
  14. 如权利要求 10 所述的多域垂直配向液晶显示面板,其特征在于:该第一基板为彩色滤光片基板,而该第二基板为薄膜晶体管基板。
  15. 如权利要求 14 所述的多域垂直配向液晶显示面板,其特征在于:该第一基板包括:
    第一透明基板;
    公共电极层,设置于该第一透明基板的内侧;
    第一配向膜,设置于该公共电极层之上;以及
    第一偏光片,设置于该第一透明基板的外侧。
  16. 如权利要求 15 所述的多域垂直配向液晶显示面板,其特征在于:该第二基板包括:
    第二透明基板;
    像素电极层,设置于该第二透明基板的内侧;
    第一配向膜,设置于该像素电极层之上;以及
    第二偏光片,设置于该第二透明基板的外侧。
  17. 如权利要求 16 所述的多域垂直配向液晶显示面板,其特征在于:该第一偏光片的偏振方向与该第二偏光片的偏振方向相互垂直。
  18. 如权利要求 16 所述的多域垂直配向液晶显示面板,其特征在于:该第一配向膜和该第二配向膜配合以使该液晶层中的液晶分子在显示暗态时垂直于该第一基板和该第二基板。
  19. 如权利要求 16 所述的多域垂直配向液晶显示面板,其特征在于:该公共电极层与该像素电极层采用透明导电材料而制成。
  20. 如权利要求 10 所述的多域垂直配向液晶显示面板,其特征在于:该液晶层中的液晶分子为负型的液晶分子。
PCT/CN2011/081717 2011-10-28 2011-11-03 多域垂直配向液晶显示面板 WO2013060039A1 (zh)

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CN113671740B (zh) * 2021-08-06 2023-05-02 Tcl华星光电技术有限公司 一种柔性显示面板以及显示装置

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