WO2016065791A1 - 光学膜材、背光模组及液晶显示装置 - Google Patents

光学膜材、背光模组及液晶显示装置 Download PDF

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WO2016065791A1
WO2016065791A1 PCT/CN2015/074215 CN2015074215W WO2016065791A1 WO 2016065791 A1 WO2016065791 A1 WO 2016065791A1 CN 2015074215 W CN2015074215 W CN 2015074215W WO 2016065791 A1 WO2016065791 A1 WO 2016065791A1
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optical film
thermal expansion
liquid crystal
crystal display
display device
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PCT/CN2015/074215
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English (en)
French (fr)
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马永达
卢永春
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京东方科技集团股份有限公司
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Priority to US14/769,093 priority Critical patent/US10120208B2/en
Publication of WO2016065791A1 publication Critical patent/WO2016065791A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/0009—Materials therefor
    • G02F1/009—Thermal properties
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/008—Mountings, adjusting means, or light-tight connections, for optical elements with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133628—Illuminating devices with cooling means

Definitions

  • the present disclosure relates to the field of liquid crystal display technologies, and in particular, to an optical film, a backlight module, and a liquid crystal display device.
  • the size of the optical film in the backlight module is also continuously increased, and the edge of the optical film near the heat source is heated and expanded due to the thermal conductivity of the optical film. Poor, causing the optical film to be warped due to uneven heating due to heat close to the heat source.
  • the edge of the optical film is locally heated and swelled, the side entrance light is incident from one side of the optical film, and a wave-shaped shadow is formed on the incident side of the side entrance light of the optical film, resulting in a liquid crystal display module. The display is poor.
  • Embodiments of the present disclosure provide an optical film, a backlight module, and a liquid crystal display device, so as to solve the problem that the edge of the optical film in the prior art is prone to warp.
  • an optical film material which may include an optical film body having a thermal expansion and contraction structure at a position close to a heat source, the thermal expansion and contraction structure being capable of releasing the optical The amount of thermal expansion of the membrane body.
  • the thermally expandable expansion structure may include a through-hole having a polygonal shape formed on the optical film body.
  • the thermally expandable stretch structure may be a notch disposed on the body of the optical film.
  • the through hole may be a regular shape or an irregular shape.
  • the through hole may be an inverted trapezoid, a rectangle or a circle.
  • the notch may include a slit.
  • the slits may be plural.
  • the thermally expandable expansion structure may further include a press fit A thermally conductive bead on the thermally expandable telescoping structure.
  • a backlight module comprising the optical film described above.
  • a liquid crystal display device comprising the above-described optical film material.
  • the thermally expandable stretch structure may extend into a viewable area of the liquid crystal display device.
  • the optical film material includes an optical film body, and a position of the optical film body near the heat source is provided with a thermal expansion and contraction structure, and the thermal expansion
  • the telescopic structure is capable of releasing the amount of thermal expansion of the optical film body such that the amount of thermal expansion of the optical film body is released, such that the flatness of the optical film near the edge of the heat source is better, thereby avoiding the optical film.
  • the edge is warped.
  • FIG. 1 is a schematic structural view of an optical film according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural view of another optical film according to an embodiment of the present disclosure.
  • FIG. 3 is a schematic structural diagram of still another optical film according to an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide an optical film material including an optical film body having a thermal expansion and contraction structure at a position close to a heat source of the optical film body, the thermal expansion and contraction structure capable of releasing the optical film material
  • the amount of thermal expansion of the body is such that the amount of thermal expansion of the optical film body is released, such that the flatness of the optical film near the edge of the heat source is better, thereby avoiding warping of the edges of the optical film.
  • the thermal expansion and contraction structure may be a notch 103 disposed on the optical film body 102.
  • the notch 103 can release the amount of thermal expansion of the optical film near the heat source, so that the flatness of the optical film is well maintained.
  • the shape of the notch 103 may be a trapezoidal, rectangular or other shape.
  • the gap 103 can extend to the visible area 101.
  • the notch 103 may include a slit 203, and the slit 203
  • the width can be set according to the actual situation.
  • the length of the slit 203 may extend to the viewable area 201 such that the slit 203 better releases the amount of thermal expansion of the optical film body 202. Since the viewing distance of the larger-sized liquid crystal display or the television is far, the portion of the slit 203 that extends to the visible area 201 does not seriously affect the display screen.
  • the number of slits 203 may be plural.
  • the thermal expansion and contraction structure may be a through hole 303 formed on the optical film body 302.
  • the through hole 303 thereon can accelerate the release speed of the thermal expansion of the optical film body 302, thereby releasing the thermal expansion amount of the optical film material as soon as possible to avoid the optical film material.
  • the edge is warped.
  • the through hole 303 may be an inverted trapezoid or a rectangle.
  • the shape of the through hole 303 is not limited to an inverted trapezoid or a rectangle, and may be other patterns, such as a circular shape.
  • the shape of the through hole 303 may be a regular shape or an irregular shape.
  • the shape of the through hole 303 may be It is a polygon.
  • the thermally expandable telescopic structure may further comprise a thermally conductive bead pressed onto the thermally expandable telescopic structure, the thermally conductive bead being capable of absorbing a thermal expansion amount on the optical film body to release a thermal expansion amount on the optical film .
  • the thermal conductive bead can also compress the edge of the optical film near the heat source, thereby preventing the thermal expansion of the edge of the optical film to cause deformation or warping.
  • Embodiments of the present disclosure also provide a backlight module including the above optical film.
  • the optical film material includes an optical film body, and a position of the optical film body near the heat source is provided with a thermal expansion and contraction structure capable of releasing an amount of thermal expansion of the optical film body such that the optical film material The amount of thermal expansion of the body is released such that the flatness of the optical film near the edge of the heat source is better, thereby avoiding warping of the edges of the optical film.
  • the embodiment of the present disclosure further provides a liquid crystal display device including the optical film material, the optical film material includes an optical film body, and the optical film body is provided with a thermal expansion and expansion structure near a heat source.
  • the thermally expandable expansion structure is capable of releasing an amount of thermal expansion of the optical film body such that the amount of thermal expansion of the optical film body is released, such that the optical film has a good flatness at an edge near the heat source position, thereby The edge of the optical film is prevented from being warped.

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

Abstract

一种光学膜材、背光模组及液晶显示装置，涉及液晶显示技术领域，解决了现有技术中的光学膜材的边缘容易发生曲翘的问题。该光学膜材，包括光学膜材本体（102，202，302），所述光学膜材本体（102，202，302）的靠近热源的位置设有热膨胀伸缩结构（103，203，303），所述热膨胀伸缩结构（103，203，303）能够释放所述光学膜材本体（102，202，302）的热膨胀量。

Description

光学膜材、背光模组及液晶显示装置 技术领域
本公开涉及液晶显示技术领域，尤其涉及一种光学膜材、背光模组及液晶显示装置。
背景技术
随着液晶显示器、电视机尺寸的不断增大，背光模组中的光学膜材的尺寸也不断地加大，光学膜材的靠近热源的边缘会受热发生膨胀，由于光学膜材的导热性能较差，导致光学膜材在靠近热源的位置会因受热不均匀而边缘发生曲翘。当光学膜材边缘局部受热膨胀发生曲翘时，侧入光由光学膜材的一侧射入，在光学膜材的侧入光的入射侧会形成波浪形的暗影，导致液晶显示模组的显示效果较差。
因此，为了提高液晶显示模组的显示效果，需要控制光学膜材边缘受热膨胀引起的曲翘。
发明内容
本公开的实施例提供一种光学膜材、背光模组及液晶显示装置，以便解决现有技术中的光学膜材的边缘容易发生曲翘的问题。
根据本公开的第一方面，提供了一种光学膜材，可以包括光学膜材本体，所述光学膜材本体的靠近热源的位置设有热膨胀伸缩结构，所述热膨胀伸缩结构能够释放所述光学膜材本体的热膨胀量。
在本公开的一个实施例中，，所述热膨胀伸缩结构可以包括开设在所述光学膜材本体上的、轮廓为多边形的通孔。
在本公开的另一实施例中，所述热膨胀伸缩结构可以为设置在所述光学膜材本体上的缺口。
在本公开的又一实施例中，所述通孔可以为规则形状或不规则形状。
其中，所述通孔可以为倒置的梯形、矩形或圆形。
其中，所述缺口可以包括狭缝。
其中，所述狭缝可以为多个。
在本公开的另一实施例中，所述热膨胀伸缩结构还可以包括压合 在所述热膨胀伸缩结构上的导热压条。
根据本公开的第二方面，提供了一种背光模组，所述背光模组包括上述的光学膜材。
根据本公开的第三方面，提供了一种液晶显示装置，所述液晶显示装置包括上述的光学膜材。
在本公开的一个实施例中，所述热膨胀伸缩结构可以延伸到所述液晶显示装置的可视区域中。
本公开实施例提供的光学膜材、背光模组及液晶显示装置中，所述光学膜材包括光学膜材本体，所述光学膜材本体的靠近热源的位置设有热膨胀伸缩结构，所述热膨胀伸缩结构能够释放光学膜材本体的热量膨胀量，使得所述光学膜材本体热膨胀的量得以释放，这样所述光学膜材在靠近热源位置的边缘的平整度较好，从而避免光学膜材的边缘发生曲翘。
附图说明
图1为本公开实施例提供的一种光学膜材的结构示意图；
图2为本公开实施例提供的另一种光学膜材的结构示意图；
图3为本公开实施例提供的又一种光学膜材的结构示意图。
具体实施方式
下面结合附图对本公开实施例进行详细描述。
本公开实施例提供了一种光学膜材，该光学膜材包括光学膜材本体，所述光学膜材本体的靠近热源的位置设有热膨胀伸缩结构，该热膨胀伸缩结构能够释放所述光学膜材本体的热量膨胀量，使得所述光学膜材本体热膨胀的量得以释放，这样所述光学膜材在靠近热源位置的边缘的平整度较好，从而避免所述光学膜材的边缘发生曲翘。
参见图1，上述实施例中，热膨胀伸缩结构可以为设置在光学膜材本体102上的缺口103。缺口103能够将靠近热源的光学膜材的热膨胀量释放，使得光学膜材的平整度得到较好地保持。缺口103的形状可以为梯形、矩形或者其他形状的图形。其中，缺口103可以延伸到可视区域101。
参见图2，上述实施例中，缺口103可以包括狭缝203，狭缝203 的宽度可以根据实际情况设定。狭缝203的长度可以延伸到可视区域201，以使狭缝203更好地释放掉光学膜材本体202的热膨胀量。由于较大尺寸的液晶显示器或电视机的观看距离较远，狭缝203的延伸到可视区域201的部分不会对显示画面造成严重的影响。
为了增强狭缝释放热膨胀的效果，狭缝203的数量可以为多个。
参见图3，上述实施例中，所述热膨胀伸缩结构可以为开设在光学膜材本体302上的通孔303。当光学膜材本体302靠近热源时，其上的通孔303能够加快光学膜材本体302热膨胀的释放速度，从而尽快地将所述光学膜材的热膨胀量释放，以避免所述光学膜材的边缘发生曲翘。具体地，所述通孔303可以为倒置的梯形或矩形。当然，所述通孔303的形状不局限于倒置的梯形或矩形，还可以是其他图形，例如圆形，通孔303的形状可以规则形状也可以不规则形状，例如，通孔303的形状可以是多边形。
应当清楚，所述热膨胀伸缩结构还可以包括压合在所述热膨胀伸缩结构上的导热压条，所述导热压条能够吸收光学膜材本体上的热膨胀量，将所述光学膜材上的热膨胀量释放。并且，导热压条还能够对靠近热源的光学膜材边缘起到压紧作用，从而避免光学膜材边缘发生热膨胀而产生形变或曲翘。
本公开实施例还提供了一种背光模组，包括上述的光学膜材。该光学膜材包括光学膜材本体，所述光学膜材本体的靠近热源的位置设有热膨胀伸缩结构，该热膨胀伸缩结构能够释放所述光学膜材本体的热量膨胀量，使得所述光学膜材本体热膨胀的量得以释放，这样所述光学膜材在靠近热源位置的边缘的平整度较好，从而避免所述光学膜材的边缘发生曲翘。
本公开实施例还提供了一种液晶显示装置，该液晶显示装置包括上述的光学膜材，该光学膜材包括光学膜材本体，所述光学膜材本体的靠近热源的位置设有热膨胀伸缩结构，该热膨胀伸缩结构能够释放所述光学膜材本体的热量膨胀量，使得所述光学膜材本体热膨胀的量得以释放，这样所述光学膜材在靠近热源位置的边缘的平整度较好，从而避免所述光学膜材的边缘发生曲翘。
在本说明书的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应所述以权利要求的保护范围为准。

Claims (10)

  1. 一种光学膜材，包括光学膜材本体，其中，所述光学膜材本体的靠近热源的位置设有热膨胀伸缩结构，所述热膨胀伸缩结构能够释放所述光学膜材本体的热膨胀量。
  2. 根据权利要求1所述的光学膜材，其中，所述热膨胀伸缩结构为开设在所述光学膜材本体上的通孔。
  3. 根据权利要求1所述的光学膜材，其中，所述热膨胀伸缩结构为设置在所述光学膜材本体上的缺口。
  4. 根据权利要求2所述的光学膜材，其中，所述通孔为规则形状或不规则形状。
  5. 根据权利要求2或4任一项所述的光学膜材，其中，所述通孔为倒置的梯形、矩形或圆形。
  6. 根据权利要求3所述的光学膜材，其中，所述缺口包括狭缝。
  7. 根据权利要求1所述的光学膜材，其中，所述热膨胀伸缩结构还包括压合在所述热膨胀伸缩结构上的导热压条。
  8. 一种背光模组，其中，所述背光模组包括权利要求1-7任一项所述的光学膜材。
  9. 一种液晶显示装置，其中，所述液晶显示装置包括权利要求1-7任一项所述的光学膜材。
  10. 根据权利要求9所述的液晶显示装置，其中，所述热膨胀伸缩结构延伸到所述液晶显示装置的可视区域中。
PCT/CN2015/074215 2014-10-29 2015-03-13 光学膜材、背光模组及液晶显示装置 WO2016065791A1 (zh)

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