WO2016000283A1 - 曲率可调节的背板及具有该背板的液晶显示装置 - Google Patents

曲率可调节的背板及具有该背板的液晶显示装置 Download PDF

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Publication number
WO2016000283A1
WO2016000283A1 PCT/CN2014/082533 CN2014082533W WO2016000283A1 WO 2016000283 A1 WO2016000283 A1 WO 2016000283A1 CN 2014082533 W CN2014082533 W CN 2014082533W WO 2016000283 A1 WO2016000283 A1 WO 2016000283A1
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WO
WIPO (PCT)
Prior art keywords
curvature
notches
back plate
bottom plate
liquid crystal
Prior art date
Application number
PCT/CN2014/082533
Other languages
English (en)
French (fr)
Inventor
余亚军
萧宇均
唐国富
吕城龄
Original Assignee
深圳市华星光电技术有限公司
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Publication date
Application filed by 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to JP2016573896A priority Critical patent/JP6345278B2/ja
Priority to GB1621127.8A priority patent/GB2541609B/en
Priority to US14/378,621 priority patent/US9280010B2/en
Priority to KR1020167035940A priority patent/KR101942168B1/ko
Publication of WO2016000283A1 publication Critical patent/WO2016000283A1/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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/13332—Front frames
    • 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

Definitions

  • Curvature adjustable back plate and liquid crystal display device having the same
  • the present invention relates to the field of liquid crystal display technology, and in particular to a back plate having an adjustable curvature and a liquid crystal display device having the same. Background technique
  • the liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used. Such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or laptop screen.
  • LCD TV liquid crystal display
  • PDA personal digital assistant
  • digital camera computer screen or laptop screen.
  • a liquid crystal display device includes a housing, a liquid crystal panel disposed in the housing, and a backlight module (Backlight module:) disposed in the housing.
  • the working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates, and the liquid crystal molecules are controlled to change direction by energization or not, and the light of the backlight module is refracted. Come out to produce the picture.
  • the backlight module is divided into a side-in type backlight module and a direct-type backlight module according to different incident positions of the light source.
  • the direct type backlight module is configured such that a backlight such as a cathode fluorescent lamp (CCFL) or a light emitting diode (LED) light source is disposed behind the liquid crystal panel, and the light is homogenized by the diffusion plate to form a surface light source.
  • a backlight such as a cathode fluorescent lamp (CCFL) or a light emitting diode (LED) light source
  • the side-lit backlight module has a backlight LED strip (Light bar) disposed at the edge of the back panel behind the liquid crystal panel, and the light emitted by the LED strip is from the side of the light guide plate (LGP).
  • the smooth surface enters the light guide plate, is reflected and diffused, and is emitted from the light exit surface of the light guide plate, and then passes through the optical film group to form a surface light source to be supplied to the liquid crystal panel.
  • curved display devices such as curved TVs.
  • curved display devices provide optimal viewing from the center to the edge of the screen, while ordinary display devices
  • the ability to render at the edge of the screen has been relatively unsatisfactory.
  • the curved display unit's entire screen is designed to provide a wide panoramic image, which provides the same visual enjoyment both in the center and around the screen, and reduces off-axis viewing when viewed at close range. Distortion.
  • the curved display device will allow the user to extend the viewing distance for a better viewing experience. Therefore, compared with ordinary display devices, curved display devices have great advantages: 1. Product differentiation; 2. Wider viewing angle; 3. Reduce distortion in close-range viewing.
  • the implementation of the existing curved display device mainly includes: 1. Attaching a bracket having a specific degree of separation to the backboard, forcing the backboard to bend into a uniformity with the bracket; 2. Forming a song directly on the backboard Surface structure.
  • the back plate can only be bent with a fixed curvature, and the curvature of the display device obtained by the two methods is also fixed, and the curvature adjustment cannot be performed according to the user's viewing requirements or the conversion between the flat display and the curved display can be realized. , to make the viewing angle subject to certain restrictions.
  • a thermal bimetal is a composite material that is firmly bonded together by two (or more) metal or alloy component layers having different coefficients of thermal expansion, wherein a set of element layers has a lower coefficient of thermal expansion, being a passive layer, and A set of element layers has a higher coefficient of thermal expansion, which is an active layer, and both the active layer and the passive layer have higher internal resistance values.
  • the hot bimetal is energized, the active layer and the passive layer can rapidly generate a large amount of heat, and the temperature rises.
  • the deformation of the active layer due to thermal expansion is significantly larger than that caused by the thermal expansion of the passive layer, causing the thermal bimetal to bend toward the passive layer side. .
  • the temperature can be controlled to control the bending deformation.
  • the hot bimetal can be used to fabricate the back plate of the liquid crystal display device, and the curvature of the curved liquid crystal display device can be realized by controlling the curvature of the back plate. Or a flat display and a surface display conversion.
  • the existing curvature-adjustable backsheet made of hot bimetal also has certain defects, which are manifested in: Due to the large length and width dimensions of the liquid crystal display device, it is made of hot bimetal.
  • the aspect ratio LVW of the back plate 10 is small, and the back plate 10 exhibits obvious bending deformation in various directions during the bending deformation of the heat, so that the curved liquid crystal display device cannot achieve more accurate curvature adjustment. , can not reach the preset bending state. Summary of the invention
  • the object of the present invention is to provide a back plate with adjustable curvature, which can accurately adjust the curvature of the back plate and facilitate stress release during deformation of the back plate, thereby making the deformation of the back plate easier.
  • Another object of the present invention is to provide a liquid crystal display device having the curvature adjustable back plate, which can conveniently and accurately adjust the curvature of the liquid crystal display device, so that the user can obtain the desired according to different needs when viewing.
  • the desired display status enhances the appeal of the product to the market.
  • the present invention firstly provides a back plate having an adjustable curvature, the curvature adjustable back plate comprising a bottom plate, the bottom plate is made of a hot bimetal, and the bottom plate is disposed along the length or width direction thereof.
  • the notch, the local aspect ratio of the bottom plate is increased by the plurality of notches.
  • Each of the notches is in the form of an elongated strip which is parallel to each other.
  • the ratio of the length to the width of the notch is 10:1.
  • the notch has a width of 5 mm, and each of the notches has an elongated strip-like rectangular shape.
  • the plurality of notches are arranged in a plurality of columns, and the series of notches are parallel to each other.
  • the present invention also provides a liquid crystal display device including a back plate, an optical component disposed in the backplane, a backlight disposed in the backplane, a plastic frame disposed above the backlight, and a liquid crystal disposed on the plastic frame Panel, and fixed LCD a front frame on the plastic frame, the back plate includes a bottom plate, the bottom plate is made of a hot bimetal, and the bottom plate is provided with a plurality of notches along a length or a width thereof, and the bottom plate is raised by the plurality of notches Local aspect ratio.
  • Each of the notches is in the form of an elongated strip which is parallel to each other.
  • the ratio of the length to the width of the notch is 10:1.
  • the notch has a width of 5 mm, and each of the notches (11) has an elongated strip-like rectangular shape.
  • the plurality of notches are arranged in a plurality of columns, and the series of notches are parallel to each other.
  • the curvature-adjustable back sheet of the present invention is improved by providing a plurality of notches on a bottom plate made of a hot bimetal, and the plurality of notches are disposed along the length or width direction of the bottom plate.
  • the partial aspect ratio of the bottom plate is such that when the curvature-adjustable back plate is bent and deformed, the degree of bending along the length of the notch is much greater than the degree of bending along the width of the notch, so that the curvature of the back plate can be compared.
  • Accurate adjustment and stress release during deformation of the backing plate make deformation of the backing plate easier.
  • the liquid crystal display device of the invention has the curvature-adjustable back plate, which can conveniently and accurately adjust the curvature of the liquid crystal display device, so that the user can obtain the desired display state according to different needs when viewing, and improve the product. Attractive to the market.
  • FIG. 1 is a schematic view showing a state of curvature of a conventionally adjustable back plate made of a hot bimetal
  • FIG. 2 is a plan view showing a first embodiment of a curvature-adjustable back plate of the present invention
  • FIG. 4 is a schematic view showing a curved state of a second embodiment of the curvature-adjustable back plate of the present invention
  • FIG. 5 is a view showing a curved state of the second embodiment of the present invention
  • FIG. 6 is a schematic view showing the structure of a liquid crystal display device having the back sheet of the present invention.
  • the curvature adjustable back plate comprises a bottom plate 1 which is made of a hot bimetal.
  • a hot bimetal is a composite material in which metal or alloy component layers having different coefficients of thermal expansion are firmly bonded together, wherein The set of element layers has a lower coefficient of thermal expansion, which is a passive layer, and the other element layer has a higher coefficient of thermal expansion, which is an active layer, and both the active layer and the passive layer have higher internal resistance values.
  • the material of the active layer may be brass, nickel, Fe-Ni-Cr, Fe-Ni-Mn or Mn-Ni-Cu alloy
  • the material of the passive layer may be Ni34% ⁇ 50%. Invar alloy.
  • the bottom plate 1 is provided with a plurality of notches 11 along its length, and each of the notches 11 has an elongated strip shape.
  • the plurality of notches 11 are parallel to each other, and the bottom plate 1 is partitioned into a plurality of regions of length L1 and width W1 to increase the local aspect ratio L1/W1 of the bottom plate 1.
  • the ratio of the length to the width of the notch 11 is L/W 10:1.
  • the width 11 of the notch 11 is 5 mm, and each notch 11 has an elongated strip-like rectangular shape.
  • the bottom plate 1 is in a planar state, and the curvature-adjustable backplane can be used as a planar backplane.
  • the curvature-adjustable back plate when the curvature-adjustable back plate is energized, since the bottom plate 1 is made of hot bimetal, the active layer and the passive layer rapidly generate a large amount of heat, the temperature rises, and the active layer is caused by thermal expansion. The deformation is significantly larger than the deformation of the passive layer due to thermal expansion, causing the bottom plate 1 to bend toward the side of the passive layer. Moreover, since the plurality of notches 11 divide the bottom plate 1 into a plurality of regions of length L1 and width W1, the local aspect ratio L1/W1 of the bottom plate 1 is increased, so that the curvature can be adjusted.
  • the degree of bending of the plate along the length direction of the notch 11 is much greater than the degree of bending along the width direction of the notch 11, avoiding significant bending deformation in all directions, so that the curvature-adjustable back plate is opposite to the
  • the length of the bottom plate 1 is bent to achieve a predetermined bending state, so that the curvature of the back plate can be accurately adjusted.
  • the curvature-adjustable backplane When the curvature-adjustable backplane is de-energized, the curvature-adjustable backplane gradually returns to the planar state as shown in FIG.
  • the plurality of notches 11 also function as an elastic buffer to facilitate deformation of the curvature-adjustable back plate. The stress release at the time makes the deformation easier.
  • FIG. 4 is a second embodiment of the curvature adjustable back plate of the present invention, which differs from the first embodiment in that the plurality of notches 11 are arranged in a plurality of rows and the plurality of notches 11 are parallel to each other, which is easier to manufacture. . Others are the same as the first embodiment, and are not described herein again.
  • Fig. 5 is a third embodiment of the curvature-adjustable back sheet of the present invention, which differs from the first embodiment in that the bottom plate 1 is provided with a plurality of notches 11" along its width direction.
  • the curvature-adjustable backing plate When the curvature-adjustable backing plate is energized in the third embodiment, the curvature-adjustable backing plate is bent farther in the length direction of the notch 11" than in the width direction of the notch 11" To avoid the occurrence of significant bending deformation in all directions, so that the curvature-adjustable back plate is bent relative to the width direction of the bottom plate 1 to achieve a predetermined bending state. The curvature of the backing plate is now more accurately adjusted.
  • the plurality of notches 11" may also be arranged in a series parallel to each other.
  • the present invention further provides a liquid crystal display device having the back plate with adjustable curvature, comprising a back plate 100 , an optical component 200 disposed in the back plate 100 , and The backlight 400 in the backplane 100, the plastic frame 600 disposed above the backlight 400, the liquid crystal panel 700 disposed on the plastic frame 600, and the front frame 800 for fixing the liquid crystal panel 700 on the plastic frame 600.
  • the back plate 100 includes a bottom plate 1 , the bottom plate 1 is made of a hot bimetal, and the bottom plate 1 is provided with a plurality of notches 11 along the length or width direction thereof, and the local length of the bottom plate 1 is increased by the plurality of notches 11 .
  • the width ratio L1/W1 so that the curvature of the back plate 100 can be accurately adjusted.
  • each of the notches 11 has an elongated strip shape which is parallel to each other.
  • the ratio of the length to the width of the notch 11 is L/W 10:1.
  • the notch 11 has a width W 5 mm, and each of the notches 11 has a thin strip shape.
  • the back plate 100 can be as described in the first embodiment of the above-described curvature-adjustable back plate, and the bottom plate 1 is provided with a plurality of notches 11 along its length.
  • the degree of bending of the backing plate 100 along the length direction of the notch 11 is much greater than the degree of bending along the width direction of the notch 11 to avoid significant bending deformation in all directions, thereby
  • the back plate 100 is bent relative to the longitudinal direction of the bottom plate 1 to achieve a preset bending state, so that the curvature of the back plate 100 can be accurately adjusted, and the curvature of the back plate 100 can be accurately adjusted. Conveniently and accurately adjust the curvature of the liquid crystal display device.
  • the back plate 100 can also be arranged in a plurality of rows 11 and the plurality of notches 11 are parallel to each other as described in the second embodiment of the above-mentioned curvature-adjustable back plate.
  • the back plate 100 can also be as described in the third embodiment of the above-mentioned curvature-adjustable back plate.
  • the bottom plate 1 is provided with a plurality of notches 11" along its width direction.
  • the degree of bending of the length direction of "11" is much larger than the degree of bending in the width direction of the notch 11", avoiding significant bending deformation in all directions, thereby bending the backing plate 100 with respect to the width direction of the bottom plate 1.
  • the preset bending state is achieved, and the curvature of the back plate 100 is adjusted more accurately. By adjusting the curvature of the back plate 100 more accurately, the curvature of the liquid crystal display device can be conveniently and accurately adjusted.
  • the curvature-adjustable back plate of the present invention has a plurality of notches provided on the bottom plate made of hot bimetal, and the plurality of notches are disposed along the length or width direction of the bottom plate, thereby improving the
  • the partial aspect ratio of the bottom plate is such that when the curvature of the adjustable back plate is bent, the degree of bending along the length of the notch is much greater than the degree of bending along the width of the notch, which can accurately correct the curvature of the back plate. Adjustment, and is beneficial to the release of stress when the backing plate is deformed, so that Backplane deformation is easier.
  • the liquid crystal display device of the invention has the curvature-adjustable back plate, which can conveniently and accurately adjust the curvature of the liquid crystal display device, so that the user can obtain the desired display state according to different needs when viewing, and improve the product. Attractive to the market.

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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)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种曲率可调节的背板及具有该背板的液晶显示装置。该曲率可调节的背板包括底板（1），所述底板（1）的材料为热双金属，所述底板（1）沿其长度或宽度方向设置数个缺口（11），通过该数个缺口（11）提高所述底板（1）的局部长宽比（L1/W1），使得该曲率可调节的背板在发生弯曲变形时，其沿缺口的长度方向的弯曲程度远大于其沿缺口的宽度方向的弯曲程度，能够实现对背板曲率进行较准确的调节，并有利于背板变形时的应力释放，使背板变形更加容易。

Description

曲率可调节的背板及具有该背板的液晶显示装置 技术领域
本发明涉及液晶显示技术领域， 尤其涉及一种曲率可调节的背板及具 有该背板的液晶显示装置。 背景技术
液晶显示装置 （Liquid Crystal Display, LCD) 具有机身薄、 省电、 无 辐射等众多优点， 得到了广泛的应用。 如： 液晶电视、 移动电话、 个人数 字助理 （PDA)、 数字相机、 计算机屏幕或笔记本电脑屏幕等。
通常液晶显示装置包括壳体、 设于壳体内的液晶面板及设于壳体内的 背光模组（Backlight module：)。 液晶面板的工作原理是在两片平行的玻璃基 板当中放置液晶分子， 两片玻璃基板中间有许多垂直和水平的细小电线， 通过通电与否来控制液晶分子改变方向， 将背光模组的光线折射出来产生 画面。 背光模组依照光源入射位置的不同分成侧入式背光模组与直下式背 光模组两种。 直下式背光模组是将背光源例如阴极萤光灯管 （Cold Cathode Fluorescent Lamp, CCFL)或发光二极管 （Light Emitting Diode, LED)光源设 置在液晶面板后方， 光线经扩散板均 化后形成面光源提供给液晶面板。 而侧入式背光模组是将背光源 LED灯条 （Light bar) 设于液晶面板侧后方 的背板边缘处， LED灯条发出的光线从导光板 （Light Guide Plate, LGP) 一侧的入光面进入导光板， 经反射和扩散后从导光板出光面射出， 再经由 光学膜片组， 以形成面光源提供给液晶面板。
近年来， 随着显示技术的发展， 各大厂商陆续的推出了曲面电视等曲 面显示装置， 整体而言， 曲面显示装置从屏幕中央到边缘都能提供最佳的 观看效果， 而普通的显示装置在屏幕边缘方面的呈现能力一直相对不太理 想。 曲面显示装置整片屏幕呈孤形的设计， 可提供宽阔的全景影像效果， 不论是在屏幕中央还是边缘四周， 都能够带来同样的视觉享受， 并且在近 距离观看时还减少了离轴观看的失真度。 此外， 曲面显示装置会让用户的 观赏距离拉长， 达到更好的观赏体验。 因此， 相比于普通的显示装置， 曲 面显示装置有着很大的优势： 1、 产品的差异化； 2、 更宽广的可视角度； 3、 减少近距离观看的失真度。
现有的曲面显示装置的实现方式主要包括： 1、 将具有特定孤度的支架 锁附于背板， 强制背板弯曲成与支架一致的孤度； 2、 直接在背板上成型曲 面结构。 然而， 此两种方式中背板只能以固定曲率弯曲， 由该两种方式得 到的显示装置的曲率亦是固定的， 不能依据用户的观看需求进行曲率调节 或实现平面显示与曲面显示的转换， 使视角受到一定的限制。
热双金属是由两个 （或多个） 具有不同热膨胀系数的金属或合金组元 层牢固地结合在一起的复合材料， 其中的一组元层具有较低的热膨胀系数， 为被动层， 另一组元层具有较高的热膨胀系数， 为主动层， 且主动层、 被 动层均具有较高的内阻值。 当对热双金属通电时， 主动层、 被动层能够迅 速产生大量热量， 温度上升， 主动层因热膨胀导致的变形明显大于被动层 因热膨胀导致的变形， 引发热双金属向被动层一侧发生弯曲。 鉴于热双金 属对温度敏感， 可通过控制温度来控制其弯曲变形量的特点， 可将热双金 属用于制作液晶显示装置的背板， 通过控制背板的曲率实现曲面液晶显示 装置的曲率调节或平面显示与曲面显示的转换。 但如图 1 所示， 现有的由 热双金属制作的曲率可调节的背板也存在一定的缺陷， 表现在： 由于液晶 显示装置的长度尺寸与宽度尺寸均较大， 由热双金属制作的背板 10的长宽 比 LVW，较小， 该背板 10在受热发生弯曲变形的过程中会在各个方向上都 出现明显的弯曲变形， 从而使得曲面液晶显示装置不能实现较准确的曲率 调节， 达不到预设的弯曲状态。 发明内容
本发明的目的在于提供一种曲率可调节的背板， 能够实现对背板曲率 进行较准确的调节， 并有利于背板变形时的应力释放， 使背板变形更加容 易。
本发明的另一目的在于提供一种具有该曲率可调节的背板的液晶显示 装置， 能够实现方便、 准确的调节液晶显示装置的曲率， 使用户在观看时， 可以根据不同的需求， 获取想要的显示状态， 提高产品对市场的吸引力。
为实现上述目的， 本发明首先提供一种曲率可调节的背板， 该曲率可 调节的背板包括底板， 所述底板的材料为热双金属， 所述底板沿其长度或 宽度方向设置数个缺口， 通过该数个缺口提高所述底板的局部长宽比。
每一缺口为细长条状， 其相互平行。
所述缺口的长度与宽度之比 10: 1。
所述缺口的宽度 5mm， 每一缺口呈细长条状矩形。
所述数个缺口排列成数列， 数列缺口之间相互平行。 本发明还提供一 种液晶显示装置， 包括背板、 设于该背板内的光学组件、 设于该背板内的 背光源、 设于背光源上方的胶框、 设于胶框上的液晶面板、 及固定液晶面 板于胶框上的前框， 所述背板包括底板， 所述底板的材料为热双金属， 所 述底板沿其长度或宽度方向设置数个缺口， 通过该数个缺口提高所述底板 的局部长宽比。
每一缺口为细长条状， 其相互平行。
所述缺口的长度与宽度之比 10: 1。
所述缺口的宽度 5mm， 每一缺口 （11 ) 呈细长条状矩形。
所述数个缺口排列成数列， 数列缺口之间相互平行。
本发明的有益效果： 本发明的曲率可调节的背板， 通过在由热双金属 制成的底板上设置数个缺口， 且所述数个缺口沿该底板的长度或宽度方向 设置， 提高了所述底板的局部长宽比， 使得该曲率可调节的背板在发生弯 曲变形时， 其沿缺口长度方向的弯曲程度远大于其沿缺口宽度方向的弯曲 程度， 能够实现对背板曲率进行较准确的调节， 并有利于背板变形时的应 力释放， 使背板变形更加容易。 本发明的液晶显示装置具有所述曲率可调 节的背板， 能够实现方便、 准确的调节液晶显示装置的曲率， 使用户在观 看时， 可以根据不同的需求， 获取想要的显示状态， 提高产品对市场的吸 引力。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其它有益效果显而易见。
附图中，
图 1为现有的由热双金属制作的曲率可调节的背板的弯曲状态示意图； 图 2为本发明的曲率可调节的背板的第一实施例的平面状态示意图； 图 3为本发明的曲率可调节的背板的第一实施例的弯曲状态示意图； 图 4为本发明的曲率可调节的背板的第二实施例的弯曲状态示意图； 图 5为本发明的曲率可调节的背板的第三实施例的弯曲状态示意图； 图 6为本发明的具有该背板的液晶显示装置的结构示意图。 具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果， 以下结合本发明 的优选实施例及其附图进行详细描述。
请参阅图 2、 图 3， 为本发明曲率可调节的背板的第一实施例。 该曲率 可调节的背板包括底板 1， 所述底板 1的材料为热双金属。热双金属为具有 不同热膨胀系数的金属或合金组元层牢固地结合在一起的复合材料， 其中 的一组元层具有较低的热膨胀系数， 为被动层， 另一组元层具有较高的热 膨胀系数， 为主动层， 且主动层、 被动层均具有较高的内阻值。 具体的， 所述主动层的材料可为黄铜、 镍、 Fe-Ni-Cr、 Fe-Ni-Mn或 Mn-Ni-Cu合金， 所述被动层的材料可为含 Ni34%〜50%的因瓦型合金。
在该第一实施例中， 所述底板 1沿其长度方向设置数个缺口 11， 每一 缺口 11 为细长条状。 所述数个缺口 11互相平行， 将所述底板 1分隔成了 数个长度为 L1、宽度为 W1的区域，提高了所述底板 1的局部长宽比 L1/W1。
进一步的， 所述缺口 11的长度与宽度之比 L/W 10: 1， 优选的， 所述 缺口 11的宽度 W 5mm， 每一缺口 11呈细长条状矩形。
如图 2所示， 未对该曲率可调节的背板通电时， 所述底板 1处于平面 状态， 该曲率可调节的背板可作为平面背板使用。
如图 3所示， 对该曲率可调节的背板通电时， 由于所述底板 1 由热双 金属制成， 其主动层与被动层迅速产生大量热量， 温度上升， 且主动层因 热膨胀导致的变形明显大于被动层因热膨胀导致的变形， 引发所述底板 1 朝向被动层一侧发生弯曲。 又由于所述数个缺口 11将所述底板 1分隔成了 数个长度为 L1、宽度为 W1的区域，提高了所述底板 1的局部长宽比 L1/W1 , 使得该曲率可调节的背板沿所述缺口 11的长度方向的弯曲程度远大于其沿 所述缺口 11的宽度方向的弯曲程度， 避免在各个方向均产生明显的弯曲变 形， 从而使得该曲率可调节的背板相对于所述底板 1 的长度方向弯曲， 达 到预设的弯曲状态， 实现对背板曲率进行较准确的调节。
当对该曲率可调节的背板断电后， 该曲率可调节的背板逐渐恢复至如 图 2所示的平面状态。
值得一提的是， 在该曲率可调节的背板产生弯曲变形或恢复至平面的 过程中， 所述数个缺口 11 还起到弹性緩冲的作用， 有利于该曲率可调节的 背板变形时的应力释放， 使变形更加容易。
图 4 为本发明曲率可调节的背板的第二实施例， 其与第一实施例的区 別在于， 所述数个缺口 11，排列成数列， 数列缺口 11，之间相互平行， 更易 于制作。 其它与第一实施例相同， 此处不再赘述。
图 5 为本发明曲率可调节的背板的第三实施例， 其与所述第一实施例 的区別在于， 所述底板 1沿其宽度方向设置数个缺口 11 "。
当对该第三实施例中曲率可调节的背板通电时， 该曲率可调节的背板 在所述缺口 11 "的长度方向的弯曲程度远大于其在所述缺口 11 "的宽度方向 的弯曲程度， 避免在各个方向均产生明显的弯曲变形， 从而使得该曲率可 调节的背板相对于所述底板 1 的宽度方向弯曲， 达到预设的弯曲状态， 实 现对背板曲率进行较准确的调节。
当然， 所述数个缺口 11 "也可排列成相互平行的数列。
其它与第一实施例相同， 此处不再赘述。
请参阅图 6， 同时参阅图 2至图 5， 本发明还提供一种具有该曲率可调 节的背板的液晶显示装置， 包括背板 100、 设于该背板 100 内的光学组件 200、 设于该背板 100内的背光源 400、 设于背光源 400上方的胶框 600、 设于胶框 600上的液晶面板 700、及固定液晶面板 700于胶框 600上的前框 800。 所述背板 100包括底板 1， 所述底板 1的材料为热双金属， 所述底板 1沿其长度或宽度方向设置数个缺口 11， 通过该数个缺口 11提高所述底板 1的局部长宽比 L1/W1 , 从而所述背板 100的曲率可准确的调节。
具体的， 每一缺口 11为细长条状， 其相互平行。
所述缺口 11的长度与宽度之比 L/W 10: 1， 优选的， 所述缺口 11的宽 度 W 5mm， 每一缺口 11呈细条状矩形。
该背板 100可如上述曲率可调节的背板的第一实施例所述， 底板 1 沿 其长度方向设置数个缺口 11。 当对背板 100通电时， 背板 100沿所述缺口 11的长度方向的弯曲程度远大于其沿所述缺口 11的宽度方向的弯曲程度， 避免在各个方向均产生明显的弯曲变形， 从而使得背板 100相对于所述底 板 1 的长度方向弯曲， 达到预设的弯曲状态， 实现对背板 100的曲率进行 较准确的调节， 并借由对背板 100 的曲率进行较准确的调节， 实现方便、 准确的调节液晶显示装置的曲率。
该背板 100也可如上述曲率可调节的背板的第二实施例所述， 数个缺 口 11，排列成数列， 数列缺口 11，之间相互平行。
该背板 100还可如上述曲率可调节的背板的第三实施例所述， 底板 1 沿其宽度方向设置数个缺口 11 "。 当对背板 100通电时， 背板 100沿所述缺 口 11 "的长度方向的弯曲程度远大于其沿所述缺口 11 "的宽度方向的弯曲程 度， 避免在各个方向均产生明显的弯曲变形， 从而使得背板 100相对于所 述底板 1的宽度方向弯曲， 达到预设的弯曲状态， 实现对背板 100的曲率 进行较准确的调节， 并借由对背板 100 的曲率进行较准确的调节， 实现方 便、 准确的调节液晶显示装置的曲率。
综上所述， 本发明的曲率可调节的背板， 通过在由热双金属制成的底 板上设置数个缺口， 且所述数个缺口沿该底板的长度或宽度方向设置， 提 高了所述底板的局部长宽比， 使得该曲率可调节的背板在发生弯曲变形时， 其沿缺口长度方向的弯曲程度远大于其沿缺口宽度方向的弯曲程度， 能够 实现对背板曲率进行较准确的调节， 并有利于背板变形时的应力释放， 使 背板变形更加容易。 本发明的液晶显示装置具有所述曲率可调节的背板， 能够实现方便、 准确的调节液晶显示装置的曲率， 使用户在观看时， 可以 根据不同的需求， 获取想要的显示状态， 提高产品对市场的吸引力。
以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形 都应属于本发明后附的权利要求的保护范围。

Claims

权 利 要 求
1、 一种曲率可调节的背板， 包括底板， 所述底板的材料为热双金属， 所述底板沿其长度或宽度方向设置数个缺口， 通过该数个缺口提高所述底 板的局部长宽比。
2、 如权利要求 1所述的曲率可调节的背板， 其中， 每一缺口为细长条 状， 其相互平行。
3、 如权利要求 2所述的曲率可调节的背板， 其中， 所述缺口的长度与 宽度之比 10: 1。
4、 如权利要求 3所述的曲率可调节的背板， 其中， 所述缺口的宽度
5mm, 每一缺口呈细长条状矩形。
5、 如权利要求 1所述的曲率可调节的背板， 其中， 所述数个缺口排列 成数列， 数列缺口之间相互平行。
6、 一种曲率可调节的背板， 包括底板， 所述底板的材料为热双金属， 所述底板沿其长度或宽度方向设置数个缺口， 通过该数个缺口提高所述底 板的局部长宽比；
其中， 每一缺口为细长条状， 其相互平行；
其中， 所述缺口的长度与宽度之比 10: 1；
其中， 所述缺口的宽度 5mm， 每一缺口呈细长条状矩形。
7、 一种液晶显示装置， 包括背板、 设于该背板内的光学组件、 设于该 背板内的背光源、 设于背光源上方的胶框、 设于胶框上的液晶面板、 及固 定液晶面板于胶框上的前框， 所述背板包括底板， 所述底板的材料为热双 金属， 所述底板沿其长度或宽度方向设置数个缺口， 通过该数个缺口提高 所述底板的局部长宽比。
8、 如权利要求 7所述的液晶显示装置， 其中， 每一缺口为细长条状， 其相互平行。
9、 如权利要求 8所述的液晶显示装置， 其中， 所述缺口的长度与宽度 之比 10: 1。
10、 如权利要 9所述的液晶显示装置， 其中， 所述缺口的宽度 5mm， 每一缺口呈细长条状矩形。
11、 如权利要求 7 所述的液晶显示装置， 其中， 所述数个缺口排列成 数列， 数列缺口之间相互平行。
PCT/CN2014/082533 2014-07-03 2014-07-18 曲率可调节的背板及具有该背板的液晶显示装置 WO2016000283A1 (zh)

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JP2016573896A JP6345278B2 (ja) 2014-07-03 2014-07-18 曲率調節可能な背板及び背板を備える液晶表示装置
GB1621127.8A GB2541609B (en) 2014-07-03 2014-07-18 Curvature-adjustable backplane and liquid crystal display device having same
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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266146B (zh) * 2014-10-09 2017-02-15 深圳市华星光电技术有限公司 一种曲率可变的背板组件及其背光单元
CN104503123A (zh) * 2014-12-31 2015-04-08 深圳市国显科技股份有限公司 一种lcd背光铁框开孔防膜拱防变形及减轻重量的结构
KR102334765B1 (ko) * 2015-07-17 2021-12-03 엘지디스플레이 주식회사 커브드 백라이트 유닛 및 이를 포함하는 커브드 액정표시장치
CN105261298A (zh) * 2015-11-05 2016-01-20 京东方科技集团股份有限公司 一种背板及曲面显示装置
CN105911733B (zh) * 2016-06-03 2023-08-29 重庆惠科金扬科技有限公司 曲面显示装置结构
CN107167935B (zh) * 2017-05-09 2020-04-28 深圳市华星光电半导体显示技术有限公司 释放阵列基板的膜层应力的方法及装置
KR102309847B1 (ko) * 2017-10-31 2021-10-08 엘지디스플레이 주식회사 커브드 표시 장치 및 이를 이용한 전자 장치
EP4131218A4 (en) 2020-03-25 2024-04-24 Wuhan China Star Optoelectronics Semiconductor Display Tech Co Ltd DISPLAY DEVICE AND DISPLAY APPARATUS
CN111402731B (zh) * 2020-03-25 2021-05-07 武汉华星光电半导体显示技术有限公司 显示装置及显示设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130021768A1 (en) * 2011-07-22 2013-01-24 Jichul Kim Chip-on-film packages and device assemblies including the same
US20130155032A1 (en) * 2011-12-20 2013-06-20 Samsung Mobile Display Co., Ltd. Display Apparatus Having Bimetal Element Which Can Be Controllably Bent
CN103730062A (zh) * 2012-09-14 2014-04-16 三星电子株式会社 弯曲显示装置
CN103854571A (zh) * 2014-03-26 2014-06-11 冠捷显示科技（厦门）有限公司 一种智能曲面显示设备及调节曲率的方法
CN103869529A (zh) * 2014-03-27 2014-06-18 深圳市华星光电技术有限公司 拼接式曲面液晶显示装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1987167A (en) * 1933-06-30 1935-01-08 Valverde Robert Bimetal thermostat element
JPS5444344A (en) * 1977-09-14 1979-04-07 Nat Jutaku Kenzai Ventilating device
JPS60179896U (ja) * 1984-05-05 1985-11-29 黒田　哲正 反転バイメタル
JP2009092884A (ja) * 2007-10-05 2009-04-30 Sharp Corp 液晶表示装置、およびその製造方法
KR101420329B1 (ko) * 2012-06-11 2014-07-16 삼성디스플레이 주식회사 표시 장치
KR101970270B1 (ko) * 2012-10-25 2019-04-18 엘지전자 주식회사 디스플레이 장치
CN104756176B (zh) * 2012-10-25 2017-12-08 Lg电子株式会社 显示装置
KR101984270B1 (ko) * 2012-12-04 2019-05-30 엘지디스플레이 주식회사 액정표시장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130021768A1 (en) * 2011-07-22 2013-01-24 Jichul Kim Chip-on-film packages and device assemblies including the same
US20130155032A1 (en) * 2011-12-20 2013-06-20 Samsung Mobile Display Co., Ltd. Display Apparatus Having Bimetal Element Which Can Be Controllably Bent
CN103730062A (zh) * 2012-09-14 2014-04-16 三星电子株式会社 弯曲显示装置
CN103854571A (zh) * 2014-03-26 2014-06-11 冠捷显示科技（厦门）有限公司 一种智能曲面显示设备及调节曲率的方法
CN103869529A (zh) * 2014-03-27 2014-06-18 深圳市华星光电技术有限公司 拼接式曲面液晶显示装置

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