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WO2021120310A1 - 曲面屏及显示装置 - Google Patents

曲面屏及显示装置 Download PDF

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Publication number
WO2021120310A1
WO2021120310A1 PCT/CN2019/129236 CN2019129236W WO2021120310A1 WO 2021120310 A1 WO2021120310 A1 WO 2021120310A1 CN 2019129236 W CN2019129236 W CN 2019129236W WO 2021120310 A1 WO2021120310 A1 WO 2021120310A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
substrate
crystal molecules
pretilt angle
curved screen
Prior art date
Application number
PCT/CN2019/129236
Other languages
English (en)
French (fr)
Inventor
曹杰
陈剑鸿
杜鹏
应见见
黄添钧
Original Assignee
深圳市华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to US16/640,489 priority Critical patent/US11391972B2/en
Publication of WO2021120310A1 publication Critical patent/WO2021120310A1/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
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • G02F1/133761—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different pretilt angles
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133776—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers having structures locally influencing the alignment, e.g. unevenness

Definitions

  • This application relates to the field of display, in particular to a curved screen and a display device.
  • a conventional liquid crystal display includes an array substrate, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate.
  • a pixel electrode layer is provided on the side of the array substrate, and a common electrode is provided on the side of the color filter substrate.
  • the liquid crystal display drives the deflection of the liquid crystal through the voltage difference between the pixel electrode and the common electrode, so that the liquid crystal display displays an image.
  • curved LCD screens Compared with flat LCD screens, curved LCD screens have a wider viewing angle and a better three-dimensional effect, so they can bring a better visual experience to the majority of users.
  • the internal liquid crystal molecules will change the optical characteristics due to stress, which will cause the liquid crystal display to have problems such as uneven display brightness and reduced clarity.
  • the present application provides a curved screen and a display device to solve the technical problem of uneven brightness of the existing curved screen.
  • This application proposes a curved screen, which includes a first substrate, a second substrate, and a liquid crystal layer located between the first substrate and the second substrate;
  • the liquid crystal layer includes a plurality of first liquid crystal molecules close to the first substrate and a plurality of second liquid crystal molecules close to the second substrate, one of the first liquid crystal molecules corresponds to one of the second liquid crystal molecules;
  • the curved screen includes a central area, a first area located on one side of the central area, and a second area located on the other side of the central area;
  • the second substrate is arranged close to the light emitting side of the curved screen
  • the pretilt angle of the first liquid crystal molecules is greater than the pretilt angle of the second liquid crystal molecules.
  • the first substrate is one of an array substrate or a color filter substrate
  • the second substrate is the other of the array substrate or the color filter substrate that is different from the first substrate.
  • any one of the first liquid crystal molecules in the direction from the central area to the first area or the second area, any one of the first liquid crystal molecules has an equal pretilt angle, and any one of the second liquid crystal molecules The pretilt angles are equal.
  • the pretilt angle of the liquid crystal molecules in the first area and the pretilt angle of the liquid crystal molecules in the second area are symmetrically arranged with respect to the central area.
  • the distance between two adjacent first liquid crystal molecules is greater than the distance between two adjacent second liquid crystal molecules.
  • the pretilt angle between the first liquid crystal molecules and the second liquid crystal molecules located in the central area is zero.
  • the pretilt angle of the first liquid crystal molecules is a
  • the pretilt angle of the second liquid crystal molecules is b, where 0° ⁇ a ⁇ 50°, 0° ⁇ b ⁇ 50°.
  • the pretilt angle of the liquid crystal molecules in the liquid crystal layer gradually changes from the pretilt angle of the first liquid crystal molecules to the first 2.
  • the first substrate includes a first substrate and a first pixel electrode layer located on the first substrate
  • the second substrate includes a second substrate and a first pixel electrode layer located on the second substrate.
  • the second pixel electrode layer on the substrate
  • the first pixel electrode layer includes at least two first pixel electrodes
  • the second pixel electrode layer includes at least two second pixel electrodes
  • the distance between two adjacent first pixel electrodes is greater than that of adjacent two pixel electrodes.
  • the distance between any two adjacent first pixel electrodes is equal, and the distance between any two adjacent second pixel electrodes is equal.
  • the first substrate further includes a first protrusion located on the first substrate, the first liquid crystal molecules are located on the first protrusion, and the second substrate further includes A second protrusion on the second substrate, and the second liquid crystal molecules are located on the second protrusion;
  • the included angle between any oblique side of the first protrusion and the first substrate is greater than the included angle between any oblique side of the second protrusion and the second substrate.
  • the display device includes a curved screen and a backlight module.
  • the curved screen includes a first substrate, a second substrate, and a display device located between the first substrate and the second substrate. Between the liquid crystal layer;
  • the liquid crystal layer includes a plurality of first liquid crystal molecules close to the first substrate and a plurality of second liquid crystal molecules close to the second substrate, one of the first liquid crystal molecules corresponds to one of the second liquid crystal molecules;
  • the curved screen includes a central area, a first area located on one side of the central area, and a second area located on the other side of the central area;
  • the second substrate is arranged close to the light emitting side of the curved screen
  • the pretilt angle of the first liquid crystal molecules is greater than the pretilt angle of the second liquid crystal molecules.
  • the first substrate is one of an array substrate or a color filter substrate
  • the second substrate is the other of the array substrate or the color filter substrate that is different from the first substrate.
  • the pretilt angle of any one of the first liquid crystal molecules is equal, and the pretilt angle of any one of the second liquid crystal molecules is equal.
  • the pretilt angle of the liquid crystal molecules in the first region and the pretilt angle of the liquid crystal molecules in the second region are symmetrically arranged about the central region.
  • the distance between two adjacent first liquid crystal molecules is greater than the distance between two adjacent second liquid crystal molecules.
  • the pretilt angle between the first liquid crystal molecules and the second liquid crystal molecules located in the central region is zero.
  • the pretilt angle of the first liquid crystal molecules is a
  • the pretilt angle of the second liquid crystal molecules is b, where 0° ⁇ a ⁇ 50°, 0° ⁇ b ⁇ 50°.
  • the pretilt angle of the liquid crystal molecules in the liquid crystal layer gradually changes from the pretilt angle of the first liquid crystal molecules to the pretilt angle of the second liquid crystal molecules.
  • the first substrate includes a first substrate and a first pixel electrode layer on the first substrate, and the second substrate includes a second substrate and a second pixel electrode on the second substrate Floor;
  • the first pixel electrode layer includes at least two first pixel electrodes
  • the second pixel electrode layer includes at least two second pixel electrodes
  • the distance between two adjacent first pixel electrodes is greater than that of adjacent two pixel electrodes.
  • the distance between any two adjacent first pixel electrodes is equal, and the distance between any two adjacent second pixel electrodes is equal.
  • the first substrate further includes a first protrusion located on the first substrate, the first liquid crystal molecules are located on the first protrusion, and the second substrate further includes A second protrusion on the second substrate, and the second liquid crystal molecules are located on the second protrusion;
  • the included angle between any oblique side of the first protrusion and the first substrate is greater than the included angle between any oblique side of the second protrusion and the second substrate.
  • the present application makes the pretilt angle of the second liquid crystal molecules close to the light-emitting side of the curved screen smaller than the pretilt angle of the first liquid crystal molecules far away from the light-emitting side to compensate for the first liquid crystal molecules and the second liquid crystals caused by the bending of the curved screen.
  • the misalignment of the molecular pretilt angle improves the brightness uniformity of the curved screen.
  • Figure 1 is a top view structure diagram of the curved screen of the application
  • Figure 2 is the first cross-sectional view of the curved screen of the application
  • Figure 3 is a second cross-sectional view of the curved screen of the application.
  • Figure 4 is a third cross-sectional view of the curved screen of the application.
  • curved LCD screens Compared with flat LCD screens, curved LCD screens have a wider viewing angle and a better three-dimensional effect, so they can bring a better visual experience to the majority of users.
  • the internal liquid crystal molecules will change the optical characteristics due to stress, which will cause the liquid crystal display to have problems such as uneven display brightness and reduced clarity.
  • This application proposes a curved screen based on the above technical problems.
  • the curved screen 100 may include a first substrate 10, a second substrate 20, and a liquid crystal layer 30 located between the first substrate 10 and the second substrate 20.
  • the liquid crystal layer 30 includes a first liquid crystal layer 11 close to the first substrate 10, a second liquid crystal layer 12 close to the second substrate 20, and a second liquid crystal layer located between the first liquid crystal layer 11 and the second liquid crystal layer.
  • the first liquid crystal layer 11 includes a plurality of first liquid crystal molecules 110
  • the second liquid crystal layer 12 includes a plurality of second liquid crystal molecules 120.
  • One of the first liquid crystal molecules 110 corresponds to one of the second liquid crystal molecules 120.
  • the curved screen 100 may include a central area 300, a first area 200 located on one side of the central area 300, and a second area 400 located on the other side of the central area 300.
  • the second substrate 20 is disposed close to the light emitting side of the curved screen 100;
  • the pretilt angle of the first liquid crystal molecules 110 is greater than the pretilt angle of the second liquid crystal molecules 200.
  • the first liquid crystal molecules 110 close to the first substrate 10 and the second liquid crystal molecules 120 of the second substrate 20 are set at different pretilt angles, so that the second liquid crystal molecules 120 close to the light-emitting side of the curved screen 100 have a pretilt angle. It is smaller than the pretilt angle of the first liquid crystal molecules 110 far from the light-emitting side to compensate for the misalignment of the pretilt angles of the first liquid crystal molecules 110 and the second liquid crystal molecules 120 caused by the bending of the curved screen 100, thereby improving the brightness uniformity of the curved screen 100 .
  • the first substrate 10 may be one of an array substrate or a color filter substrate
  • the second substrate 20 may be an array substrate or a color filter substrate, which is different from the first substrate 10.
  • the present application uses the first substrate 10 as an array substrate and the second substrate 20 as a color filter substrate to describe specific technical solutions.
  • the pretilt angle of any one of the first liquid crystal molecules 110 is equal, and any one of the first liquid crystal molecules 110 has the same pretilt angle.
  • the pretilt angles of the two liquid crystal molecules 120 are equal.
  • the curved screen 100 is described in an expanded state.
  • the first liquid crystal molecules 110 and the second liquid crystal molecules 120 will rotate with the alignment layer. Therefore, the first liquid crystal molecules 110 and their corresponding second liquid crystal molecules 120 are on the curved surface.
  • the first pretilt angle difference on the normal line when the screen 100 is in the curved state is equal to the second pretilt angle difference on the normal line when the first liquid crystal molecule 110 and its corresponding second liquid crystal molecule 120 are in the flat state of the curved screen.
  • the difference between the pretilt angles of the first liquid crystal molecules 110 and the second liquid crystal molecules 120 will not change with the change of the angle of the curved screen.
  • the pretilt angle of any one of the first liquid crystal molecules 110 is the same, and the pretilt angle of any one of the second liquid crystal molecules 120 is the same, and it can be seen from FIG. 2 It can be seen that the deflection angle of the first liquid crystal molecule 110 is smaller than the deflection angle of the second liquid crystal molecule 120.
  • the pretilt angle of the first liquid crystal molecules 110 is a
  • the pretilt angle of the second liquid crystal molecules 120 is b, where 0° ⁇ a ⁇ 50° and 0° ⁇ b ⁇ 50°.
  • the area of the second substrate 20 is smaller than that of the first substrate.
  • the distance between two adjacent first liquid crystal molecules 110 is greater than the distance between two adjacent second liquid crystal molecules 120. Similar to the above embodiment, in order to ensure that the first liquid crystal molecules 110 and the second liquid crystal molecules 120 can be on the same normal line after bending.
  • the pre-tilt angle of the second liquid crystal molecules 120 close to the light-emitting side of the curved screen 100 is smaller than the pre-tilt angle of the first liquid crystal molecules 110 far away from the light-emitting side to compensate for the bending of the curved screen 100 that causes the first liquid crystal to be bent.
  • the misalignment of the pretilt angles of the molecules 110 and the second liquid crystal molecules 120 makes the pretilt angle difference between the first liquid crystal molecules 110 and the second liquid crystal molecules 120 reach the value required by this application, so as to ensure the uniformity of the brightness of each area , Improve user experience.
  • the first substrate 10 may include a first substrate 101, a first pixel electrode layer located on the first substrate 101, and a first pixel electrode layer located on the first substrate 101.
  • the second substrate 20 may include a second substrate 201, a second pixel electrode layer on the second substrate 201, and a plurality of the second liquid crystal molecules 120 on the second pixel electrode layer. .
  • the first pixel electrode layer may include at least two first pixel electrodes 102
  • the second pixel electrode layer may include at least two second pixel electrodes 202.
  • the pitch L1 of any two adjacent first pixel electrodes 102 may be equal
  • the pitch L2 of any two adjacent second pixel electrodes 202 may be equal.
  • the distance L1 between two adjacent first pixel electrodes 102 is greater than the distance L2 between two adjacent second pixel electrodes 202.
  • the first liquid crystal molecules 110 that have been aligned in advance and their corresponding second liquid crystal molecules 120 are misaligned, so that the first liquid crystal molecules 110 cannot be positioned at an angle.
  • the second liquid crystal molecule 120 corresponding to the upper surface is paired, and it cannot be aligned in the spatial position, resulting in poor brightness uniformity of the curved screen 100 of the present application.
  • the distance between adjacent first pixel electrodes 102 in the first substrate 10 is increased.
  • the distance between two adjacent first pixel electrodes 102 is greater than that between two adjacent first pixel electrodes.
  • the difference in the pitch of the second pixel electrode 202 can be compensated by the curvature of the curved screen 100, which ensures that the first liquid crystal molecules 110 and the corresponding second liquid crystal molecules 120 can be aligned in space, which improves the curved screen. 100 brightness uniformity.
  • the first substrate 10 may further include a first protrusion 103 on the first substrate 101, and the first liquid crystal molecules 110 are located on the first protrusion 103.
  • the second substrate 20 further includes a second protrusion 203 located on the second substrate 201, and the second liquid crystal molecules 120 are located on the second protrusion 203.
  • the angle between any oblique side of the first protrusion 103 and the first substrate 101 is smaller than that of any oblique side of the second protrusion 203 and the second substrate 201 ⁇ The included angle.
  • the cross section of the first protrusion 103 and the second protrusion 203 may be an isosceles triangle, and the first liquid crystal molecule 110 is located on any hypotenuse of the first protrusion 103 Above, the second liquid crystal molecule 120 is located on any oblique side of the second protrusion 203.
  • the pretilt angle b of the first liquid crystal molecule 110 or the second liquid crystal molecule 120 is equal to the tilt angle of the hypotenuse of the corresponding protrusion.
  • the present application can adjust the inclination angle of the hypotenuse of the first protrusion 103 and the second protrusion 203 to adjust the pretilt angle b of the first liquid crystal molecule 110 and the second liquid crystal molecule 120, so as to improve the curved screen 100 brightness uniformity.
  • the pretilt angle b of the first liquid crystal molecules 110 and the second liquid crystal molecules 120 in the first region 200 is equal. Since the central area 300 is located in the middle area of the curved screen 100, this area is the area where the curvature of the curved screen 100 is 0. Therefore, this area is the same as the flat display. When the first substrate 10 and the second substrate 20 are aligned, there is no misalignment. technical problem.
  • the pretilt angle of the liquid crystal molecules in the first region 200 and the pretilt angle of the liquid crystal molecules in the second region 400 are symmetrically arranged with respect to the central region 300. Since the shape of the curved screen 100 is symmetrically arranged in the central area 300, the curvature of each part in the first area 200 and the second area 400 is the same. Therefore, the present application can combine the liquid crystals in the first area 200 The pretilt angle of the molecules and the pretilt angle of the liquid crystal molecules in the second region 400 are arranged symmetrically with respect to the central region 300.
  • the pretilt angle of the liquid crystal molecules in the liquid crystal layer gradually changes from the pretilt angle a of the first liquid crystal molecules 110 to The pretilt angle b of the second liquid crystal molecules 120 is described.
  • the angle of the liquid crystal molecules in the intermediate layer gradually changes from the pretilt angle a of the first liquid crystal molecules 110 to the second liquid crystal molecules.
  • the pretilt angle b of the liquid crystal molecules 120 changes.
  • the application also proposes a display device, which includes the above-mentioned curved screen and a backlight module.
  • this embodiment can perform zone control on the backlight of the curved screen. Since different curvatures cause the brightness of different areas to be inconsistent, the intensity of the backlight in the backlight module can be increased according to the changing law of the curvature. For example, in the direction from the central area to the first area or the second area, the intensity of the backlight in the backlight module is gradually increased to compensate for the decrease in the brightness of the curved screen due to the increase in the curvature of the curved screen. Minor technical issues.
  • This application proposes a curved screen and a display device, which includes a first substrate, a second substrate, and a liquid crystal layer; the liquid crystal layer includes a plurality of first liquid crystal molecules close to the first substrate, and A plurality of second liquid crystal molecules on the substrate, one of the first liquid crystal molecules corresponds to one of the second liquid crystal molecules; the curved screen includes a central area, a first area located on one side of the central area, and The second area on the other side of the area; the second substrate is arranged close to the light-emitting side of the curved screen; in the first area and the second area, the pretilt angle of the first liquid crystal molecules is greater than that of the The pretilt angle of the second liquid crystal molecule.
  • the present application makes the pretilt angle of the second liquid crystal molecules close to the light-emitting side of the curved screen smaller than the pretilt angle of the first liquid crystal molecules far away from the light-emitting side to compensate for the first liquid crystal molecules and the second liquid crystals caused by the bending of the curved screen.
  • the misalignment of the molecular pretilt angle improves the brightness uniformity of the curved screen.

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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)
  • Spectroscopy & Molecular Physics (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种曲面屏(100)及显示装置，其包括第一基板(10)、第二基板(20)及液晶层(30)；液晶层(30)包括靠近第一基板(10)的多个第一液晶分子(110)、及靠近第二基板(20)的多个第二液晶分子(120)；曲面屏(100)包括中心区(300)、位于中心区(300)两侧的第一区(200)和第二区(400)；第二基板(20)靠近曲面屏(100)的出光侧设置；第一液晶分子(110)的预倾角(a)大于第二液晶分子(120)的预倾角(b)。

Description

曲面屏及显示装置 技术领域
本申请涉及显示领域，特别涉及一种曲面屏及显示装置。
 背景技术
常规液晶显示器包括阵列基板、彩膜基板及位于阵列基板与彩膜基板之间的液晶层。阵列基板侧设置有像素电极层，彩膜基板侧设置有公共电极。液晶显示器通过像素电极与公共电极之间的电压差以驱动液晶偏转，使得液晶显示器显示图像。
相比平面液晶显示屏，曲面液晶显示屏具有更广的视角，更好的立体感，因此能给广大用户带来更好的视觉体验。但是，当曲面液晶面板弯曲后，其内部的液晶分子会由于应力作用而使光学特性发生改变，从而导致液晶显示屏出现显示亮度不均匀，清晰度下降等问题。
因此，目前亟需一种新型的曲面屏以解决上述问题。
 技术问题
本申请提供一种曲面屏及显示装置，以解决现有曲面屏亮度不均匀的技术问题。
 技术解决方案
本申请提出了一种曲面屏，其包括第一基板、第二基板及位于所述第一基板与所述第二基板之间的液晶层；
所述液晶层包括靠近所述第一基板的多个第一液晶分子、及靠近所述第二基板的多个第二液晶分子，一所述第一液晶分子对应一所述第二液晶分子；
所述曲面屏包括中心区、位于所述中心区一侧的第一区、及位于所述中心区另一侧的第二区；
所述第二基板靠近所述曲面屏的出光侧设置；
其中，在所述第一区及所述第二区内，所述第一液晶分子的预倾角大于所述第二液晶分子的预倾角。
在本申请的曲面屏中，所述第一基板为阵列基板或彩膜基板中的一者，所述第二基板为阵列基板或彩膜基板中与所述第一基板互不相同的另一者。
在本申请的曲面屏中，在所述中心区至所述第一区或所述第二区的方向上，任一所述第一液晶分子的预倾角相等，任一所述第二液晶分子的预倾角相等。
在本申请的曲面屏中，所述第一区内液晶分子的预倾角与所述第二区内液晶分子的预倾角以所述中心区呈对称设置。
在本申请的曲面屏中，当所述曲面屏处于展平状态时，相邻两个所述第一液晶分子的间距大于相邻两个所述第二液晶分子的间距。
在本申请的曲面屏中，位于所述中心区内的第一液晶分子与所述第二液晶分子的预倾角为0。
在本申请的曲面屏中，所述第一液晶分子的预倾角为a，所述第二液晶分子的预倾角为b，其中，0°≤a≤50°，0°≤b≤50°。
在本申请的曲面屏中，在所述第一基板至所述第二基板的方向上，所述液晶层中液晶分子的预倾角从所述第一液晶分子的预倾角逐渐变化成所述第二液晶分子的预倾角。
在本申请的曲面屏中，所述第一基板包括第一衬底和位于所述第一衬底上的第一像素电极层，所述第二基板包括第二衬底和位于所述第二衬底上的第二像素电极层；
所述第一像素电极层包括至少两个第一像素电极，所述第二像素电极层包括至少两个第二像素电极，相邻两个所述第一像素电极的间距大于相邻两个所述第二像素电极的间距；
任一相邻两个所述第一像素电极的间距相等，任一相邻两个所述第二像素电极的间距相等。
在本申请的曲面屏中，所述第一基板还包括位于第一衬底上的第一凸起，所述第一液晶分子位于所述第一凸起上，所述第二基板还包括位于第二衬底上的第二凸起，所述第二液晶分子位于所述第二凸起上；
其中，所述第一凸起中任一斜边与所述第一衬底的夹角大于所述第二凸起中任一斜边与所述第二衬底的夹角。
本申请还提出了一种显示装置，所述显示装置包括曲面屏及背光模组，其中，所述曲面屏包括第一基板、第二基板及位于所述第一基板与所述第二基板之间的液晶层；
所述液晶层包括靠近所述第一基板的多个第一液晶分子、及靠近所述第二基板的多个第二液晶分子，一所述第一液晶分子对应一所述第二液晶分子；
所述曲面屏包括中心区、位于所述中心区一侧的第一区、及位于所述中心区另一侧的第二区；
所述第二基板靠近所述曲面屏的出光侧设置；
其中，在所述第一区及所述第二区内，所述第一液晶分子的预倾角大于所述第二液晶分子的预倾角。
在本申请的显示装置中，所述第一基板为阵列基板或彩膜基板中的一者，所述第二基板为阵列基板或彩膜基板中与所述第一基板互不相同的另一者。
在本申请的显示装置中，
在所述中心区至所述第一区或所述第二区的方向上，任一所述第一液晶分子的预倾角相等，任一所述第二液晶分子的预倾角相等。
在本申请的显示装置中，所述第一区内液晶分子的预倾角与所述第二区内液晶分子的预倾角以所述中心区呈对称设置。
在本申请的显示装置中，当所述曲面屏处于展平状态时，相邻两个所述第一液晶分子的间距大于相邻两个所述第二液晶分子的间距。
在本申请的显示装置中，
位于所述中心区内的第一液晶分子与所述第二液晶分子的预倾角为0。
在本申请的显示装置中，所述第一液晶分子的预倾角为a，所述第二液晶分子的预倾角为b，其中，0°≤a≤50°，0°≤b≤50°。
在本申请的显示装置中，
在所述第一基板至所述第二基板的方向上，所述液晶层中液晶分子的预倾角从所述第一液晶分子的预倾角逐渐变化成所述第二液晶分子的预倾角。
在本申请的显示装置中，
所述第一基板包括第一衬底和位于所述第一衬底上的第一像素电极层，所述第二基板包括第二衬底和位于所述第二衬底上的第二像素电极层；
所述第一像素电极层包括至少两个第一像素电极，所述第二像素电极层包括至少两个第二像素电极，相邻两个所述第一像素电极的间距大于相邻两个所述第二像素电极的间距；
任一相邻两个所述第一像素电极的间距相等，任一相邻两个所述第二像素电极的间距相等。
在本申请的显示装置中，所述第一基板还包括位于第一衬底上的第一凸起，所述第一液晶分子位于所述第一凸起上，所述第二基板还包括位于第二衬底上的第二凸起，所述第二液晶分子位于所述第二凸起上；
其中，所述第一凸起中任一斜边与所述第一衬底的夹角大于所述第二凸起中任一斜边与所述第二衬底的夹角。
 有益效果
本申请通过使靠近所述曲面屏出光侧的第二液晶分子的预倾角小于远离所述出光侧的第一液晶分子的预倾角，以补偿曲面屏因弯曲而导致第一液晶分子与第二液晶分子预倾角的错位，提高了曲面屏的亮度均一性。
 附图说明
图1为本申请曲面屏的俯视结构图；
图2为本申请曲面屏的第一种剖视图；
图3为本申请曲面屏的第二种剖视图；
图4为本申请曲面屏的第三种剖视图。
 本发明的实施方式
为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
与平面液晶显示屏相比，曲面液晶显示屏具有更广的视角，更好的立体感，因此能给广大用户带来更好的视觉体验。但是，当曲面液晶面板弯曲后，其内部的液晶分子会由于应力作用而使光学特性发生改变，从而导致液晶显示屏出现显示亮度不均匀，清晰度下降等问题。本申请基于上述技术问题提出了一种曲面屏。
请参阅图1~4，所述曲面屏100可以包括第一基板10、第二基板20及位于所述第一基板10与所述第二基板20之间的液晶层30。
所述液晶层30包括靠近所述第一基板10的第一液晶层11、靠近所述第二基板20的第二液晶层12、及位于所述第一液晶层11与所述第二液晶层12之间的中间层。所述第一液晶层11包括多个第一液晶分子110，所述第二液晶层12包括多个第二液晶分子120，一所述第一液晶分子110对应一所述第二液晶分子120。
请参阅图1，所述曲面屏100可以包括中心区300、位于所述中心区300一侧的第一区200、及位于所述中心区300另一侧的第二区400。
在本实施例中，所述第二基板20靠近所述曲面屏100的出光侧设置；
在本实施例中，在所述第一区200及所述第二区300内，所述第一液晶分子110的预倾角大于所述第二液晶分子200的预倾角。
本申请通过将靠近第一基板10的第一液晶分子110与第二基板20的第二液晶分子120设置不同的预倾角，使靠近所述曲面屏100出光侧的第二液晶分子120的预倾角小于远离所述出光侧的第一液晶分子110的预倾角，以补偿曲面屏100因弯曲而导致第一液晶分子110与第二液晶分子120预倾角的错位，提高了曲面屏100的亮度均一性。
现结合具体实施例对本申请的技术方案进行描述。
实施例一
在本实施例中，所述第一基板10可以为阵列基板或彩膜基板中的一者，所述第二基板20可以为阵列基板或彩膜基板中与所述第一基板10互不相同的另一者。为了叙述方便，下面的实施例中，本申请以所述第一基板10为阵列基板，所述第二基板20为彩膜基板对具体技术方案进行叙述。
请参阅图1~2，在所述中心区300至所述第一区200或所述第二区400的方向上，任一所述第一液晶分子110的预倾角相等，任一所述第二液晶分子120的预倾角相等。
在本实施例的图2中，为了方便叙述，所述曲面屏100中以展开状态进行叙述。而由于曲面屏100从弯曲状态变换成平面状态时，第一液晶分子110和第二液晶分子120会随着配向层转动，因此，第一液晶分子110和其对应的第二液晶分子120在曲面屏100处于曲面状态时的法线上的第一预倾角差、与第一液晶分子110和其对应的第二液晶分子120在曲面屏处于平面状态时的法线上的第二预倾角差相等，第一液晶分子110与第二液晶分子120的预倾角之差不会随着曲面屏角度的变化而改变。
以所述第一区200中的液晶分子为例，任一所述第一液晶分子110的预倾角大小相等，任一所述第二液晶分子120的预倾角大小相等，以及从图2中可以看出，所述第一液晶分子110的偏转角度小于所述第二液晶分子120的偏转角度。
在本实施例中，所述第一液晶分子110的预倾角为a，所述第二液晶分子120的预倾角为b，其中，0°≤a≤50°，0°≤b≤50°。
由于曲面屏100中的第二基板20与第一基板10处于同一弧度，而第二基板20靠近出光侧，因此在显示屏处于平面阶段时，所述第二基板20的面积小于所述第一基板10的面积。而由于第一液晶分子110与其对应的第二液晶分子120存在错位，因此在曲面屏100进行卷曲时，使得不同位置的第一液晶分子110及第二液晶分子120在弯曲后处于同一法线上。
在本实施例中，当所述曲面屏110处于展平状态时，相邻两个所述第一液晶分子110的间距大于相邻两个所述第二液晶分子120的间距。与上述实施例相同，为了保证第一液晶分子110与所述第二液晶分子120在弯曲后能够处于同一法线上。
本实施例通过使靠近所述曲面屏100出光侧的第二液晶分子120的预倾角小于远离所述出光侧的第一液晶分子110的预倾角，以补偿曲面屏100因弯曲而导致第一液晶分子110与第二液晶分子120预倾角的错位，使得第一液晶分子110与第二液晶分子120之间的预倾角度差值达到本申请所需要的值，以保证各区域的亮度的均一性，提高用户体验。
实施例二
本实施例与实施例一相同或相似，不同之处在于：
请参阅图3，在实施例一的基础上，所述第一基板10可以包括第一衬底101、位于所述第一衬底101上的第一像素电极层、及位于所述第一像素电极层上的多个所述第一液晶分子110。所述第二基板20可以包括第二衬底201、位于所述第二衬底201上的第二像素电极层、及位于所述第二像素电极层上的多个所述第二液晶分子120。
在本实施例中，所述第一像素电极层可以包括至少两个第一像素电极102，所述第二像素电极层可以包括至少两个第二像素电极202。任一相邻两个所述第一像素电极102的间距L1可以相等，任一相邻两个所述第二像素电极202的间距L2可以相等。
在本实施例中，相邻两个所述第一像素电极102的间距L1大于相邻两个所述第二像素电极202的间距L2。
由于所述第一基板10的面积大于所述第二基板20的面积，在显示屏进行弯曲时，若所述第一基板10中相邻两个所述第一像素电极102的间距与所述彩膜基板中相邻两个所述第二像素电极202的间距相等时，预先完成配向的第一液晶分子110与其对应的第二液晶分子120存在错位，使得第一液晶分子110不仅无法在角度上与其对应的第二液晶分子120进行配对，其在空间位置上也无法进行对位，导致本申请的曲面屏100的亮度均一性较差。
本申请在通过将第一基板10中相邻所述第一像素电极102的间距增大，在显示屏弯曲时，相邻两个所述第一像素电极102的间距与相邻两个所述第二像素电极202的间距之差能被曲面屏100的弯曲度所补偿，保证了所述第一液晶分子110与其对应的第二液晶分子120能在空间位置上进行对位，提高了曲面屏100的亮度均一性。
实施例三
本实施例与实施例一、二相同或相似，不同之处在于：
请参阅图4，所述第一基板10还可以包括位于第一衬底101上的第一凸起103，所述第一液晶分子110位于所述第一凸起103上。所述第二基板20还包括位于第二衬底201上的第二凸起203，所述第二液晶分子120位于所述第二凸起203上。
在本实施例中，所述第一凸起103中任一斜边与所述第一衬底101的夹角小于所述第二凸起203中任一斜边与所述第二衬底201的夹角。
在本实施例中，所述第一凸起103及所述第二凸起203的横截面可以为等腰三角形，所述第一液晶分子110位于所述第一凸起103的任一斜边上，所述第二液晶分子120位于所述第二凸起203的任一斜边上。
本实施例中的所述第一液晶分子110或所述第二液晶分子120的预倾角b与对应的凸起的斜边的倾角相等。本申请可以调节所述第一凸起103及所述第二凸起203斜边的倾斜角以调整所述第一液晶分子110及所述第二液晶分子120的预倾角b，以改善曲面屏100的亮度均一性。
在上述实施例中，所述第一区200内的第一液晶分子110与所述第二液晶分子120的预倾角b相等。由于中心区300位于曲面屏100中间区域，该区域为曲面屏100弯曲度为0的区域，因此该区域与平面显示屏相同，第一基板10与第二基板20对位时，不存在错位的技术问题。
在上述实施例中，所述第一区200内液晶分子的预倾角与所述第二区400内液晶分子的预倾角以所述中心区300呈对称设置。由于曲面屏100的外形以中心区300域呈对称设置，因此所述第一区200与所述第二区400中各部分的弯曲度相同，因此本申请可以将所述第一区200内液晶分子的预倾角与所述第二区400内液晶分子的预倾角以所述中心区300呈对称设置。
在上述实施例中，在所述第一基板10至所述第二基板20的方向上，所述液晶层中液晶分子的预倾角从所述第一液晶分子110的预倾角a逐渐变化成所述第二液晶分子120的预倾角b。由于为了保证光线从第一液晶分子110到第二液晶分子120的能平滑穿透，所述中间层中的液晶分子的角度从所述第一液晶分子110的预倾角a逐渐向所述第二液晶分子120的预倾角b变化。
本申请还提出了一种显示装置，所述显示装置包括上述曲面屏及背光模组。在上述实施例的基础上，本实施例可以对所述曲面屏的背光进行分区控制。由于不同弯曲度导致不同区域的亮度不一致，因此可以根据弯曲度的变化规律，增加背光模组中的背光强度。例如，在所述中心区至所述第一区或所述第二区的方向上，所述背光模组中的背光强度逐渐增加，以补偿曲面屏中因弯曲度增加而导致曲面屏亮度减小的技术问题。
本申请提出了一种曲面屏及显示装置，其包括第一基板、第二基板及液晶层；所述液晶层包括靠近所述第一基板的多个第一液晶分子、及靠近所述第二基板的多个第二液晶分子，一所述第一液晶分子对应一所述第二液晶分子；所述曲面屏包括中心区、位于所述中心区一侧的第一区、及位于所述中心区另一侧的第二区；所述第二基板靠近所述曲面屏的出光侧设置；在所述第一区及所述第二区内，所述第一液晶分子的预倾角大于所述第二液晶分子的预倾角。本申请通过使靠近所述曲面屏出光侧的第二液晶分子的预倾角小于远离所述出光侧的第一液晶分子的预倾角，以补偿曲面屏因弯曲而导致第一液晶分子与第二液晶分子预倾角的错位，提高了曲面屏的亮度均一性。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (20)

  1. 一种曲面屏，其包括第一基板、第二基板及位于所述第一基板与所述第二基板之间的液晶层；
    所述液晶层包括靠近所述第一基板的多个第一液晶分子、及靠近所述第二基板的多个第二液晶分子，一所述第一液晶分子对应一所述第二液晶分子；
    所述曲面屏包括中心区、位于所述中心区一侧的第一区、及位于所述中心区另一侧的第二区；
    所述第二基板靠近所述曲面屏的出光侧设置；
    其中，在所述第一区及所述第二区内，所述第一液晶分子的预倾角大于所述第二液晶分子的预倾角。
  2. 根据权利要求1所述的曲面屏，其中，
    所述第一基板为阵列基板或彩膜基板中的一者，所述第二基板为阵列基板或彩膜基板中与所述第一基板互不相同的另一者。
  3. 根据权利要求2所述的曲面屏，其中，
    在所述中心区至所述第一区或所述第二区的方向上，任一所述第一液晶分子的预倾角相等，任一所述第二液晶分子的预倾角相等。
  4. 根据权利要求2所述的曲面屏，其中，所述第一区内液晶分子的预倾角与所述第二区内液晶分子的预倾角以所述中心区呈对称设置。
  5. 根据权利要求2所述的曲面屏，其中，当所述曲面屏处于展平状态时，相邻两个所述第一液晶分子的间距大于相邻两个所述第二液晶分子的间距。
  6. 根据权利要求2所述的曲面屏，其中，
    位于所述中心区内的第一液晶分子与所述第二液晶分子的预倾角为0。
  7. 根据权利要求1所述的曲面屏，其中，所述第一液晶分子的预倾角为a，所述第二液晶分子的预倾角为b，其中，0°≤a≤50°，0°≤b≤50°。
  8. 根据权利要求2所述的曲面屏，其中，
    在所述第一基板至所述第二基板的方向上，所述液晶层中液晶分子的预倾角从所述第一液晶分子的预倾角逐渐变化成所述第二液晶分子的预倾角。
  9. 根据权利要求2所述的曲面屏，其中，
    所述第一基板包括第一衬底和位于所述第一衬底上的第一像素电极层，所述第二基板包括第二衬底和位于所述第二衬底上的第二像素电极层；
    所述第一像素电极层包括至少两个第一像素电极，所述第二像素电极层包括至少两个第二像素电极，相邻两个所述第一像素电极的间距大于相邻两个所述第二像素电极的间距；
    任一相邻两个所述第一像素电极的间距相等，任一相邻两个所述第二像素电极的间距相等。
  10. 根据权利要求2所述的曲面屏，其中，所述第一基板还包括位于第一衬底上的第一凸起，所述第一液晶分子位于所述第一凸起上，所述第二基板还包括位于第二衬底上的第二凸起，所述第二液晶分子位于所述第二凸起上；
    其中，所述第一凸起中任一斜边与所述第一衬底的夹角大于所述第二凸起中任一斜边与所述第二衬底的夹角。
  11. 一种显示装置，所述显示装置包括曲面屏及背光模组，其中，所述曲面屏包括第一基板、第二基板及位于所述第一基板与所述第二基板之间的液晶层；
    所述液晶层包括靠近所述第一基板的多个第一液晶分子、及靠近所述第二基板的多个第二液晶分子，一所述第一液晶分子对应一所述第二液晶分子；
    所述曲面屏包括中心区、位于所述中心区一侧的第一区、及位于所述中心区另一侧的第二区；
    所述第二基板靠近所述曲面屏的出光侧设置；
    其中，在所述第一区及所述第二区内，所述第一液晶分子的预倾角大于所述第二液晶分子的预倾角。
  12. 根据权利要求11所述的显示装置，其中，
    所述第一基板为阵列基板或彩膜基板中的一者，所述第二基板为阵列基板或彩膜基板中与所述第一基板互不相同的另一者。
  13. 根据权利要求12所述的显示装置，其中，
    在所述中心区至所述第一区或所述第二区的方向上，任一所述第一液晶分子的预倾角相等，任一所述第二液晶分子的预倾角相等。
  14. 根据权利要求12所述的显示装置，其中，所述第一区内液晶分子的预倾角与所述第二区内液晶分子的预倾角以所述中心区呈对称设置。
  15. 根据权利要求12所述的显示装置，其中，
    当所述曲面屏处于展平状态时，相邻两个所述第一液晶分子的间距大于相邻两个所述第二液晶分子的间距。
  16. 根据权利要求12所述的显示装置，其中，
    位于所述中心区内的第一液晶分子与所述第二液晶分子的预倾角为0。
  17. 根据权利要求11所述的显示装置，其中，所述第一液晶分子的预倾角为a，所述第二液晶分子的预倾角为b，其中，0°≤a≤50°，0°≤b≤50°。
  18. 根据权利要求12所述的显示装置，其中，
    在所述第一基板至所述第二基板的方向上，所述液晶层中液晶分子的预倾角从所述第一液晶分子的预倾角逐渐变化成所述第二液晶分子的预倾角。
  19. 根据权利要求12所述的显示装置，其中，
    所述第一基板包括第一衬底和位于所述第一衬底上的第一像素电极层，所述第二基板包括第二衬底和位于所述第二衬底上的第二像素电极层；
    所述第一像素电极层包括至少两个第一像素电极，所述第二像素电极层包括至少两个第二像素电极，相邻两个所述第一像素电极的间距大于相邻两个所述第二像素电极的间距；
    任一相邻两个所述第一像素电极的间距相等，任一相邻两个所述第二像素电极的间距相等。
  20. 根据权利要求12所述的显示装置，其中，
    所述第一基板还包括位于第一衬底上的第一凸起，所述第一液晶分子位于所述第一凸起上，所述第二基板还包括位于第二衬底上的第二凸起，所述第二液晶分子位于所述第二凸起上；
    其中，所述第一凸起中任一斜边与所述第一衬底的夹角大于所述第二凸起中任一斜边与所述第二衬底的夹角。
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