WO2021027159A1 - 扩散片结构 - Google Patents

扩散片结构 Download PDF

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Publication number
WO2021027159A1
WO2021027159A1 PCT/CN2019/118374 CN2019118374W WO2021027159A1 WO 2021027159 A1 WO2021027159 A1 WO 2021027159A1 CN 2019118374 W CN2019118374 W CN 2019118374W WO 2021027159 A1 WO2021027159 A1 WO 2021027159A1
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WO
WIPO (PCT)
Prior art keywords
diffusion
nano
diffuser
transparent substrate
carrier
Prior art date
Application number
PCT/CN2019/118374
Other languages
English (en)
French (fr)
Inventor
李迁
Original Assignee
Tcl华星光电技术有限公司
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.)
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Publication date
Application filed by Tcl华星光电技术有限公司 filed Critical Tcl华星光电技术有限公司
Priority to US16/619,099 priority Critical patent/US11874554B2/en
Publication of WO2021027159A1 publication Critical patent/WO2021027159A1/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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
    • G02B2207/101—Nanooptics

Definitions

  • This application relates to the field of display technology, in particular to a diffuser structure using Janus material.
  • a liquid crystal display includes a liquid crystal panel and a backlight module that provides a light source.
  • the backlight module includes a lamp tube, a light guide plate, a reflection sheet, a diffusion sheet, etc.
  • the lamp tube mainly achieves the purpose of light emission
  • the diffusion sheet mainly uses some scattered ions to uniformly scatter the emitted light to all directions, increasing the uniformity of light distribution.
  • the lamp tube In the process of continuous lighting of the backlight module, the lamp tube will heat up, which will increase the temperature of the backlight module. The closer the lamp tube is, the more serious the heat will be. This causes the temperature difference of the liquid crystal panel in the entire backlight plate. The difference will be higher than 10 degrees, causing the LCD panel to have local whitening and other display screen defects. This is because liquid crystals have different brightness at different temperatures under the same voltage.
  • the purpose of the present invention is to solve the technical problem of poor display images such as local whitening in the existing liquid crystal panel.
  • one purpose of the present application is to provide a diffuser structure that uses Janus material in the diffuser to replace the diffuser particles in the prior art.
  • it also has excellent Thermal conductivity, thereby improving thermal uniformity and uniform heating of the liquid crystal panel, can reduce the influence of temperature on the liquid crystal material during the lighting process, thereby improving the problem of local whitening.
  • the present application provides a diffusion sheet structure, which includes a transparent substrate and a diffusion film.
  • the transparent substrate includes a first upper surface and a first lower surface.
  • the diffusion film is arranged on the transparent substrate and includes a plurality of nano diffusion particles, and has a second upper surface and a second lower surface, and the second lower surface is connected with the first upper surface.
  • the light from the backlight module enters the transparent substrate from the first lower surface, leaves the transparent substrate from the first upper surface, and the light enters the diffuser film from the second lower surface and leaves the diffuser film from the second upper surface, and is irradiated to a plurality of The nano diffusion particles are then diffused, and a plurality of nano diffusion particles are on the diffusion film to transfer the heat energy from the backlight module.
  • each nano-diffusion particle further includes a first part and a second part, the first part includes metal or carbon, and the second part includes organic matter.
  • the diffusion film further includes a diffusion layer, the first part forms the diffusion layer, and the diffusion layer includes the second upper surface.
  • the diffusion film further includes an organic layer, the second part forms the organic layer, and the organic layer includes a second lower surface, and an intermolecular force is generated between the second lower surface and the first upper surface.
  • each nano-diffusion particle further includes a carrier, the carrier includes silicon or carbon, the first part is arranged on one side of the carrier, and the second part is arranged on the other side of the carrier.
  • the diffusion film further includes an organic layer and a carrier layer, the second part forms the organic layer, and the organic layer includes a second lower surface, and an intermolecular force is generated between the second lower surface and the first upper surface; and the carrier is formed Carrier layer.
  • the particle size of the plurality of nano diffusion particles is less than 20 nanometers.
  • the plurality of nano-diffusion particles include one or more of silver, gold, alumina, copper, tin, and carbon.
  • the plurality of nano diffusion particles include a resin material.
  • a plurality of nano diffusion particles are arranged on the transparent substrate in an ultrasonic spraying manner.
  • the present application further provides a diffusion sheet structure, which includes a transparent substrate and a diffusion film.
  • the transparent substrate includes a first upper surface and a first lower surface.
  • the diffusion film is arranged on the transparent substrate and includes a plurality of nano diffusion particles, and has a second upper surface and a second lower surface, and the second lower surface is connected with the first upper surface.
  • each nano-diffusion particle further includes a first part, a second part and a carrier.
  • the carrier includes silicon or carbon. The first part is arranged on one side of the carrier, and the second part is arranged on the other side of the carrier.
  • the light from the backlight module enters the transparent substrate from the first lower surface, leaves the transparent substrate from the first upper surface, and the light enters the diffuser film from the second lower surface and leaves the diffuser film from the second upper surface, and is irradiated to a plurality of The nano diffusion particles are then diffused, and a plurality of nano diffusion particles are on the diffusion film to transfer the heat energy from the backlight module.
  • the first part includes metal or carbon
  • the second part includes an organic substance
  • the diffusion film further includes a diffusion layer, the first part forms the diffusion layer, and the diffusion layer includes the second upper surface.
  • the diffusion film further includes an organic layer, the second part forms the organic layer, and the organic layer includes the second lower surface, the second lower surface and the first upper surface There is an intermolecular force between them.
  • the diffusion film further includes an organic layer and a carrier layer, the second part forms the organic layer, and the organic layer includes the second lower surface, and the second lower surface and the An intermolecular force is generated between the first upper surface; and the carrier forms the carrier layer.
  • the present application further provides a diffusion sheet structure, which includes a transparent substrate and a diffusion film.
  • the transparent substrate includes a first upper surface and a first lower surface.
  • the diffusion film is arranged on the transparent substrate and includes a diffusion layer, an organic layer and a plurality of nano diffusion particles, and has a second upper surface and a second lower surface, and the second lower surface is connected with the first upper surface.
  • each nano-diffusion particle further includes a first part and a second part.
  • the first part forms a diffusion layer
  • the diffusion layer includes a second upper surface
  • the second part forms an organic layer
  • the organic layer includes a second lower surface and a second lower surface.
  • the light from the backlight module enters the transparent substrate from the first lower surface, leaves the transparent substrate from the first upper surface, and the light enters the diffuser film from the second lower surface and leaves the diffuser film from the second upper surface, and is irradiated to a plurality of The nano diffusion particles are then diffused, and a plurality of nano diffusion particles are on the diffusion film to transfer the heat energy from the backlight module.
  • the first part includes metal or carbon
  • the second part includes an organic substance
  • the particle size of the plurality of nano diffusion particles is less than 20 nanometers.
  • the plurality of nano-diffusion particles include one or more of silver, gold, alumina, copper, tin, and carbon.
  • the plurality of nano diffusion particles include a resin material.
  • the technical effect of the present invention is to use Janus material in the diffuser to replace the diffuser particles in the prior art.
  • it also has excellent thermal conductivity, thereby improving thermal uniformity and making the liquid crystal panel
  • the heat-receiving property becomes uniform, which can reduce the influence of temperature on the liquid crystal material during the lighting process, thereby improving the problem of local whitening.
  • FIG. 1 is a first schematic diagram of the structure of the diffusion sheet of this application.
  • Fig. 2 is a second schematic diagram of the diffuser structure of the application.
  • Fig. 3 is a third schematic diagram of the diffuser structure of the application.
  • FIGS. 1 to 3 are the first schematic diagrams to the third schematic diagrams of the diffuser structure of the application.
  • the diffusion sheet structure of the present application includes a transparent substrate 100 and a diffusion film 200.
  • the transparent substrate 100 includes a first upper surface 102 and a first lower surface 104.
  • the transparent substrate 100 includes an anti-scratch layer 106 and a light-transmitting layer 108, and the light-transmitting layer 108 is disposed on the anti-scratch layer 106.
  • the light-transmitting layer 108 includes polyethylene terephthalate (polyethylene terephthalate). terephthalate (PET), polystyrene (PS), poly(methyl methacrylate) (PMMA), polycarbonate (Polycarbonate, One or more of PC), transparent material, transparent plastic, and transparent glass, but not only that, the light-transmitting layer 108 can be made of various materials that facilitate light penetration.
  • PET polyethylene terephthalate
  • PS polystyrene
  • PMMA poly(methyl methacrylate)
  • PC polycarbonate
  • transparent material transparent plastic
  • transparent glass but not only that, the light-transmitting layer 108 can be made of various materials that facilitate light penetration.
  • the scratch-resistant layer 106 may include a first lower surface 104, and the scratch-resistant layer 106 is surface-treated or cured by other curing methods to increase the hardness of the first lower surface 104 to prevent scratches and reduce light penetration.
  • the scratch resistant layer 106 includes one or more of polyethylene terephthalate, polystyrene, polymethyl methacrylate, polycarbonate, transparent material, transparent plastic, and transparent glass, but not only this
  • the anti-scratch layer 106 can be made of various materials that facilitate light penetration.
  • the diffusion film 200 is disposed on the transparent substrate 100 and has a second upper surface 202 and a second lower surface 204, and the second lower surface 204 is connected to the first upper surface 102.
  • the diffusion film 200 includes a plurality of nano-diffusions. ⁇ 206.
  • the light from the backlight module enters the transparent substrate 100 from the first lower surface 104, leaves the transparent substrate 100 from the first upper surface 102, and enters the diffuser film 200 from the second lower surface 204 and leaves the diffuser from the second upper surface 202
  • the film 200 is irradiated to a plurality of nano diffusion particles 206 and then diffused, and the plurality of nano diffusion particles 206 transfer heat energy from the backlight module on the diffusion film 200.
  • the backlight module can be an edge type (Edge Type) or Direct Type (Direct Type) backlight modules are not limited.
  • the diameter of each nano-diffusion particle 206 of the present application is greater than 0 nanometers and less than 20 nanometers, and can be prepared by chemical deposition. Because the nano-diffusion particles 206 have a very small particle size, they can have a larger surface area than ordinary materials, and thus can more easily transfer heat energy. In particular, they can be transferred in the diffusion film 200 in a thermally conductive manner. The heat transfer makes the temperature distribution on the diffusion film 200 uniform and reduces the temperature difference.
  • the plurality of nano-diffusion particles 206 include one or more of silver, gold, aluminum oxide, copper, tin, carbon and other materials that can help heat transfer, so that the temperature on the diffusion film 200 The distribution is uniform and the temperature difference is reduced.
  • a plurality of nano diffusion particles 206 may be disposed on the transparent substrate 100 by ultrasonic spraying, but it is not limited to this.
  • a plurality of nano diffusion particles 206 may be directly coated on the transparent substrate 100.
  • a uniform thin film material is then formed by a knife coating method, and then a diffusion film 200 is formed.
  • each nano-diffusion particle 206 further includes a first portion 2062, a second portion 2064, and a carrier 2066.
  • the first portion 2062 includes metal or carbon
  • the second portion 2064 includes organic matter.
  • the carrier 2066 includes silicon or carbon. 2062 is arranged on one side of the carrier 2066, and the second part 2064 is arranged on the other side of the carrier 2066.
  • the diffusion film 200 further includes a diffusion layer 208 and an organic layer 210.
  • the first portion 2062 forms the diffusion layer 208, and the diffusion layer 208 includes the second upper surface 202; the second portion 2064 forms the organic layer 210, and the organic layer 210 includes the first Intermolecular forces are generated between the two lower surfaces 204, the second lower surface 204 and the first upper surface 102, and the carrier 2066 forms the carrier layer 212.
  • each nano-diffusion particle 206 can be a Janus particle, so the nano-diffusion particle 206 can be a special type of nanoparticle composed of two or more components with different physical properties, so that Two different types of chemical properties are present on the same particle.
  • the organic functional groups on the second lower surface 204 of the diffusion film 200 can be modified to be well combined with the transparent substrate 100 to prevent the diffusion film 200 from falling off and improve the stability of the diffusion sheet structure.
  • the nano-diffusion particles 206 of the present application can be prepared by various preparation methods, such as microfluidic synthesis, topological selective surface modification, template self-assembly, controllable phase separation, controllable surface nucleation, chemical deposition, etc. .
  • the first part 2062 such as silver nanoparticles
  • the carrier 2066 such as silicon balls
  • the first part 2062 of the nano-diffusion particles 206 of the present application can use materials with good thermal conductivity such as aluminum oxide (Al2O3), gold (Au), carbon (such as graphene), etc.; and the second part of the nano-diffusion particles 206
  • the transparent substrate 100 can be selected and below, for example, a material with good bonding with polyethylene terephthalate, such as a resin material, etc., to generate molecules between the second lower surface 204 and the first upper surface 102 Interaction forces, such as secondary bonds, Van der Waals forces, etc., can prevent the diffusion film 200 from falling off and improve the stability of the diffusion sheet structure.
  • Each nano-diffusion particle 206 includes a first portion 2062 and a second portion 2064.
  • the first portion 2062 includes metal or carbon, and the second portion 2064 includes organic matter;
  • the diffusion film 200 further includes a diffusion layer 208 and an organic layer 210.
  • the first portion 2062 forms the diffusion layer 208, and the diffusion layer 208 includes the second upper surface 202;
  • the second portion 2064 forms the organic layer 210, and the organic layer 210 includes the first Intermolecular force is generated between the two lower surfaces 204, the second lower surface 204 and the first upper surface 102.
  • each nano-diffusion particle 206 can be a Janus particle, so the nano-diffusion particle 206 can be a special type of nanoparticle composed of two or more different physical properties, so that Two different types of chemical properties appear on the same particle.
  • the organic functional groups on the second lower surface 204 of the diffusion film 200 can be modified to be well combined with the transparent substrate 100 to prevent the diffusion film 200 from falling off and improve the stability of the diffusion sheet structure.
  • the nano-diffusion particles 206 of the present application can be prepared by various preparation methods, such as microfluidic synthesis, topological selective surface modification, template self-assembly, controllable phase separation, controllable surface nucleation, chemical deposition, etc. .
  • the first portion 2062 such as silver nanoparticles
  • the lower surface is modified with an organic material to form the second portion 2064 to obtain the designated organic layer 210.
  • the first part 2062 of the nano-diffusion particles 206 of the present application can use materials with good thermal conductivity such as aluminum oxide (Al2O3), gold (Au), carbon (such as graphene), etc.; and the second part of the nano-diffusion particles 206
  • the transparent substrate 100 can be selected and below, for example, a material with good bonding with polyethylene terephthalate, such as a resin material, etc., to generate molecules between the second lower surface 204 and the first upper surface 102 Interaction forces, such as secondary bonds, Van der Waals forces, etc., can prevent the diffusion film 200 from falling off and improve the stability of the diffusion sheet structure.
  • this application uses Janus material in the diffuser to replace the diffuser particles in the prior art.
  • it also has excellent thermal conductivity, thereby improving thermal uniformity and making the liquid crystal panel
  • the heat-receiving property becomes uniform, which can reduce the influence of temperature on the liquid crystal material during the lighting process, thereby improving the problem of local whitening.

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

Abstract

一种扩散片结构，包括透明基板（100）以及扩散膜（200）。透明基板（100）包括第一上表面（102）及第一下表面（104）。扩散膜（200）设置于透明基板（100）上，并包括多个纳米扩散颗粒（206），且具有第二上表面（202）及第二下表面（204），第二下表面（204）与第一上表面（102）相连接。使用詹纳斯材料于扩散片中取代现有技术中的扩散颗粒，除了保有原本扩散光线的功能外，还具有优秀的热传导性，从而改善热均匀性，使液晶面板受热性变得均匀，可在点灯过程中减少液晶材料受温度的影响，从而改善局部泛白的问题。

Description

扩散片结构 技术领域
本申请涉及显示技术领域，特别是一种使用詹纳斯(Janus)材料的扩散片结构。
 背景技术
一般而言，液晶显示器包括液晶面板以及提供光源的背光模块。背光模块包括灯管、导光板、反射片、扩散片等，灯管主要实现发光的目的，而扩散片主要是通过一些散射离子使发射的光均匀的散射到各个方向，增加光分布均匀性。
在背光模块持续点亮的过程中，灯管会发热，从而使背光模块的温度提高，且越靠近灯管的地方，受热越严重，造成液晶面板在整个背光板中的温度存在温度差，温度差会高于10度以上，导致液晶面板出现局域泛白等显示画面不良出现。这是因为液晶在相同电压下，在不同温度下亮度不同导致的。
因此，需要一种扩散片结构以解决现有技术存在的问题。
 技术问题
本发明的目的在于，解决现有的液晶面板出现局域泛白等显示画面不良的技术问题。
 技术解决方案
为解决上述技术问题，本申请的一目的在于提供一种扩散片结构，使用詹纳斯材料于扩散片中取代现有技术中的扩散颗粒，除了保有原本扩散光线的功能外，还具有优秀的热传导性，从而改善热均匀性，使液晶面板受热性变得均匀，可在点灯过程中减少液晶材料受温度的影响，从而改善局部泛白的问题。
基于上述目的，本申请提供一种扩散片结构，其包括透明基板以及扩散膜。透明基板包括第一上表面及第一下表面。扩散膜设置于透明基板上，且包括多个纳米扩散颗粒，并具有第二上表面及第二下表面，第二下表面与第一上表面相连接。进一步说明，来自背光模块的光线由第一下表面进入透明基板，由第一上表面离开透明基板，且光线由第二下表面进入扩散膜并由第二上表面离开扩散膜，并照射至多个纳米扩散颗粒后扩散，且多个纳米扩散颗粒于扩散膜上以传递来自背光模块的热能。
优选地，各纳米扩散颗粒更包括第一部分及第二部分，第一部分包括金属或碳，第二部分包括有机物。
优选地，扩散膜更包括扩散层，第一部分形成扩散层，且扩散层包括第二上表面。
优选地，扩散膜更包括有机物层，第二部分形成有机物层，且有机物层包括第二下表面，第二下表面与第一上表面之间产生一分子间作用力。
优选地，各纳米扩散颗粒更包括载体，载体包括硅或碳，第一部分设置于载体之一侧，第二部分设置于所述载体之另一侧。
优选地，扩散膜更包括有机物层及载体层，第二部分形成有机物层，且有机物层包括第二下表面，且第二下表面与第一上表面之间产生分子间作用力；且载体形成载体层。
优选地，多个纳米扩散颗粒之粒径小于20纳米。
优选地，多个纳米扩散颗粒包括银、金、氧化铝、铜、锡、碳中的一项或数项。
优选地，多个纳米扩散颗粒包括树脂材料。
优选地，多个纳米扩散颗粒以超声波喷涂方式设置于透明基板上。
基于上述目的，本申请再提供一种扩散片结构，其包括透明基板以及扩散膜。透明基板包括第一上表面及第一下表面。扩散膜设置于透明基板上，且包括多个纳米扩散颗粒，并具有第二上表面及第二下表面，第二下表面与第一上表面相连接。进一步说明，各纳米扩散颗粒更包括第一部分、第二部分及载体，载体包括硅或碳，第一部分设置于载体之一侧，第二部分设置于载体之另一侧。进一步说明，来自背光模块的光线由第一下表面进入透明基板，由第一上表面离开透明基板，且光线由第二下表面进入扩散膜并由第二上表面离开扩散膜，并照射至多个纳米扩散颗粒后扩散，且多个纳米扩散颗粒于扩散膜上以传递来自背光模块的热能。
优选地，所述第一部分包括金属或碳，所述第二部分包括一有机物。
优选地，所述扩散膜更包括一扩散层，所述第一部分形成所述扩散层，且所述扩散层包括所述第二上表面。
优选地，所述扩散膜更包括一有机物层，所述第二部分形成所述有机物层，且所述有机物层包括所述第二下表面，所述第二下表面与所述第一上表面之间产生一分子间作用力。
优选地，所述扩散膜更包括一有机物层及一载体层，所述第二部分形成所述有机物层，且所述有机物层包括所述第二下表面，且所述第二下表面与所述第一上表面之间产生一分子间作用力；且所述载体形成所述载体层。
基于上述目的，本申请再提供一种扩散片结构，其包括透明基板以及扩散膜。透明基板包括第一上表面及第一下表面。扩散膜设置于透明基板上，且包括扩散层、有机物层及多个纳米扩散颗粒，并具有第二上表面及第二下表面，第二下表面与第一上表面相连接。进一步说明，各纳米扩散颗粒更包括第一部分及第二部分，第一部分形成扩散层，且扩散层包括第二上表面，第二部分形成有机物层，且有机物层包括第二下表面，第二下表面与第一上表面之间产生分子间作用力。进一步说明，来自背光模块的光线由第一下表面进入透明基板，由第一上表面离开透明基板，且光线由第二下表面进入扩散膜并由第二上表面离开扩散膜，并照射至多个纳米扩散颗粒后扩散，且多个纳米扩散颗粒于扩散膜上以传递来自背光模块的热能。
优选地，所述第一部分包括金属或碳，所述第二部分包括一有机物。
优选地，多个纳米扩散颗粒之粒径小于20纳米。
优选地，多个纳米扩散颗粒包括银、金、氧化铝、铜、锡、碳中的一项或数项。
优选地，多个纳米扩散颗粒包括树脂材料。
 有益效果
本发明的技术效果在于，使用詹纳斯材料于扩散片中取代现有技术中的扩散颗粒，除了保有原本扩散光线的功能外，还具有优秀的热传导性，从而改善热均匀性，使液晶面板受热性变得均匀，可在点灯过程中减少液晶材料受温度的影响，从而改善局部泛白的问题。
 附图说明
图1为本申请的扩散片结构的第一示意图。
图2为本申请的扩散片结构的第二示意图。
图3为本申请的扩散片结构的第三示意图。
 本发明的最佳实施方式
为了让本揭示的上述及其他目的、特征、优点能更明显易懂，下文将特举本揭示优选实施例，并配合所附图式，作详细说明如下。再者，本揭示所提到的方向用语，例如上、下、顶、底、前、后、左、右、内、外、侧层、周围、中央、水平、横向、垂直、纵向、轴向、径向、最上层或最下层等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本揭示，而非用以限制本揭示。
在图中，结构相似的单元是以相同标号表示。
请参阅图1至图3，图1至图3为本申请的扩散片结构的第一示意图至第三示意图。本申请的扩散片结构，包括透明基板100及扩散膜200。
进一步说明，透明基板100包括第一上表面102及第一下表面104。且在一实施例中，透明基板100包括抗刮层106及透光层108，透光层108设置于抗刮层106上。
而在另一实施例中，透光层108包括聚对苯二甲酸乙二酯(polyethylene terephthalate，PET)、聚苯乙烯(Polystyrene，PS)、聚甲基丙烯酸甲酯(poly(methyl methacrylate)， PMMA)、聚碳酸酯(Polycarbonate, PC)、透明材料、透明塑料、透明玻璃中的一项或数项，但不仅于此，透光层108可由各种利于光线穿透的材料构成。
另外，在一实施例中，抗刮层106可包括第一下表面104，抗刮层106经由表面处理或是其它固化方式使得第一下表面104的硬度增加，防止刮伤，而减少光线穿透的穿透率。且抗刮层106包括聚对苯二甲酸乙二酯、聚苯乙烯、聚甲基丙烯酸甲酯、聚碳酸酯、透明材料、透明塑料、透明玻璃中的一项或数项，但不仅于此，抗刮层106可由各种利于光线穿透的材料构成。
扩散膜200设置于透明基板100上，具有第二上表面202及第二下表面204，且第二下表面204与所述第一上表面102相连接，另外，扩散膜200包括多个纳米扩散颗粒206。
来自背光模块的光线由第一下表面104进入透明基板100，由第一上表面102离开透明基板100，且光线由第二下表面204进入扩散膜200并由第二上表面202离开所述扩散膜200，并照射至多个纳米扩散颗粒206后扩散，且所述多个纳米扩散颗粒206于所述扩散膜200上传递来自背光模块的热能。进一步说明，背光模块可为侧光式(Edge Type)或直下式(Direct Type)的背光模块，并无限定。
在一实施例中，本申请的各纳米扩散颗粒206之粒径大于0纳米，小于20纳米，且可由化学沉积法制备。由于纳米扩散颗粒206具有十分小的粒径，因此相较于一般的材料而言，可具有更大的表面积，因而可以更容易的将热能传递，特别是，可以热传导方式于扩散膜200中将热量传递，使得扩散膜200上的温度分布均匀，减少温差。
在一实施例中，多个纳米扩散颗粒206包括银、金、氧化铝、铜、锡、碳中的一项或数项等可有助于热传递的材料，以使得扩散膜200上的温度分布均匀，减少温差。
在一实施例中，多个纳米扩散颗粒206可以超声波喷涂方式设置于所述透明基板100上，但并不以此为限，举例而言，可将多个纳米扩散颗粒206直接涂覆在透明基板100上，然后再通过刮涂法形成一层均匀的薄膜材料，而后形成扩散膜200。
而在一实施例中，各纳米扩散颗粒206更包括第一部分2062、第二部分2064及载体2066，第一部分2062包括金属或碳，第二部分2064包括有机物；载体2066包括硅或碳，第一部分2062设置于载体2066之一侧，第二部分2064设置于所述载体2066之另一侧。
进一步说明，扩散膜200更包括扩散层208及有机物层210，第一部分2062形成扩散层208，且扩散层208包括第二上表面202；第二部分2064形成有机物层210，且有机物层210包括第二下表面204，第二下表面204与第一上表面102之间产生分子间作用力，且载体2066形成载体层212。
进一步说明，如图2所示，各纳米扩散颗粒206可为詹纳斯(Janus)颗粒，因此纳米扩散颗粒206可由两个或两个以上不同物理性质的成分构成的特殊类型的纳米颗粒，使得两种不同类型的化学性质呈现在同一颗粒上。在此实施例中，可以修饰扩散膜200的第二下表面204的有机官能团，以与透明基板100良好的结合，使扩散膜200不易脱落，提升扩散片结构的稳定性。
而本申请的纳米扩散颗粒206可以通过各种制备方法制备，例如可通过微流体合成、拓扑选择表面改性、模板自组装、可控相分离、可控表面成核、化学沉积法等方式制备。而在此实施例中，可先在载体2066，例如硅球上，形成第一部分2062，例如银纳米颗粒，然后超声波喷涂形成薄膜片后，再用有机材料修饰下表面，形成第二部分2064，而得到指定的有机物层210。
进一步说明，本申请的纳米扩散颗粒206的第一部分2062可以使用氧化铝(Al2O3)、金(Au)、碳(例如石墨稀)等具有好的热传导性的材料；而纳米扩散颗粒206的第二部分2064，可选择和下方的透明基板100，例如与聚对苯二甲酸乙二酯具有良好结合性的材料，如树脂材料等，使第二下表面204与第一上表面102之间产生分子间作用力，例如次级键、凡得瓦力等等，以使扩散膜200不易脱落，提升扩散片结构的稳定性。
而在另一实施例中，如图3所示，亦可不包括载体2066，各纳米扩散颗粒206包括第一部分2062及第二部分2064，第一部分2062包括金属或碳，第二部分2064包括有机物；而扩散膜200更包括扩散层208及有机物层210，第一部分2062形成扩散层208，且扩散层208包括第二上表面202；第二部分2064形成有机物层210，且有机物层210包括所述第二下表面204，第二下表面204与第一上表面102之间产生分子间作用力。
进一步说明，如图3所示，各纳米扩散颗粒206可为詹纳斯(Janus)颗粒，因此纳米扩散颗粒206可由两个或两个以上不同物理性质的成分构成的特殊类型的纳米颗粒，使得两种不同类型的化学性质呈现在同一颗粒上。在此实施例中，可以修饰扩散膜200的第二下表面204的有机官能团，以与透明基板100良好的结合，使扩散膜200不易脱落，提升扩散片结构的稳定性。
而本申请的纳米扩散颗粒206可以通过各种制备方法制备，例如可通过微流体合成、拓扑选择表面改性、模板自组装、可控相分离、可控表面成核、化学沉积法等方式制备。而在此实施例中，可直接形成第一部分2062，例如银纳米颗粒，然后超声波喷涂形成薄膜片后，再用有机材料修饰下表面，形成第二部分2064，而得到指定的有机物层210。
进一步说明，本申请的纳米扩散颗粒206的第一部分2062可以使用氧化铝(Al2O3)、金(Au)、碳(例如石墨稀)等具有好的热传导性的材料；而纳米扩散颗粒206的第二部分2064，可选择和下方的透明基板100，例如与聚对苯二甲酸乙二酯具有良好结合性的材料，如树脂材料等，使第二下表面204与第一上表面102之间产生分子间作用力，例如次级键、凡得瓦力等等，以使扩散膜200不易脱落，提升扩散片结构的稳定性。
综上所述，本申请使用詹纳斯材料于扩散片中取代现有技术中的扩散颗粒，除了保有原本扩散光线的功能外，还具有优秀的热传导性，从而改善热均匀性，使液晶面板受热性变得均匀，可在点灯过程中减少液晶材料受温度的影响，从而改善局部泛白的问题。
尽管已经相对于一个或多个实现方式示出并描述了本揭示，但是本领域技术人员基于对本说明书和附图的阅读和理解将会想到等价变型和修改。本揭示包括所有这样的修改和变型，并且仅由所附权利要求的范围限制。特别地关于由上述组件执行的各种功能，用于描述这样的组件的术语旨在对应于执行所述组件的指定功能（例如其在功能上是等价的）的任意组件（除非另外指示），即使在结构上与执行本文所示的本说明书的示范性实现方式中的功能的公开结构不等同。此外，尽管本说明书的特定特征已经相对于若干实现方式中的仅一个被公开，但是这种特征可以与如可以对给定或特定应用而言是期望和有利的其他实现方式的一个或多个其他特征组合。而且，就术语“包括”、“具有”、“含有”或其变形被用在具体实施方式或权利要求中而言，这样的术语旨在以与术语“包括”相似的方式包括。
以上仅是本揭示的优选实施方式，应当指出，对于本领域普通技术人员，在不脱离本揭示原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本揭示的保护范围。

Claims (20)

  1. 一种扩散片结构，其特征在于，包括：
    一透明基板，包括一第一上表面及一第一下表面；以及
    一扩散膜，设置于所述透明基板上，且包括多个纳米扩散颗粒，并具有一第二上表面及一第二下表面，所述第二下表面与所述第一上表面相连接；
    其中，来自一背光模块的一光线由所述第一下表面进入所述透明基板，由所述第一上表面离开所述透明基板，且所述光线由所述第二下表面进入所述扩散膜并由所述第二上表面离开所述扩散膜，并照射至所述多个纳米扩散颗粒后扩散，且所述多个纳米扩散颗粒于所述扩散膜上传递来自所述背光模块的一热能。
  2. 如权利要求1所述的扩散片结构，其特征在于，所述各纳米扩散颗粒更包括一第一部分及一第二部分，所述第一部分包括金属或碳，所述第二部分包括一有机物。
  3. 如权利要求2所述的扩散片结构，其特征在于，所述扩散膜更包括一扩散层，所述第一部分形成所述扩散层，且所述扩散层包括所述第二上表面。
  4. 如权利要求2所述的扩散片结构，其特征在于，所述扩散膜更包括一有机物层，所述第二部分形成所述有机物层，且所述有机物层包括所述第二下表面，所述第二下表面与所述第一上表面之间产生一分子间作用力。
  5. 如权利要求2所述的扩散片结构，其特征在于，所述各纳米扩散颗粒更包括一载体，所述载体包括硅或碳，所述第一部分设置于所述载体之一侧，所述第二部分设置于所述载体之另一侧。
  6. 如权利要求5所述的扩散片结构，其特征在于，所述扩散膜更包括一有机物层及一载体层，所述第二部分形成所述有机物层，且所述有机物层包括所述第二下表面，且所述第二下表面与所述第一上表面之间产生一分子间作用力；且所述载体形成所述载体层。
  7. 如权利要求1所述的扩散片结构，其特征在于，所述多个纳米扩散颗粒之一粒径小于20纳米。
  8. 如权利要求1所述的扩散片结构，其特征在于，所述多个纳米扩散颗粒包括银、金、氧化铝、铜、锡、碳中的一项或数项。
  9. 如权利要求1所述的扩散片结构，其特征在于，所述多个纳米扩散颗粒包括树脂材料。
  10. 如权利要求1所述的扩散片结构，其特征在于，所述多个纳米扩散颗粒以超声波喷涂方式设置于所述透明基板上。
  11. 一种扩散片结构，其特征在于，包括：
    一透明基板，包括一第一上表面及一第一下表面；以及
    一扩散膜，设置于所述透明基板上，且包括多个纳米扩散颗粒，并具有一第二上表面及一第二下表面，所述第二下表面与所述第一上表面相连接；
    其中，所述各纳米扩散颗粒更包括一第一部分、一第二部分及一载体，所述载体包括硅或碳，所述第一部分设置于所述载体之一侧，所述第二部分设置于所述载体之另一侧；
    其中，来自一背光模块的一光线由所述第一下表面进入所述透明基板，由所述第一上表面离开所述透明基板，且所述光线由所述第二下表面进入所述扩散膜并由所述第二上表面离开所述扩散膜，并照射至所述多个纳米扩散颗粒后扩散，且所述多个纳米扩散颗粒于所述扩散膜上传递来自所述背光模块的一热能。
  12. 如权利要求11所述的扩散片结构，其特征在于，所述第一部分包括金属或碳，所述第二部分包括一有机物。
  13. 如权利要求11所述的扩散片结构，其特征在于，所述扩散膜更包括一扩散层，所述第一部分形成所述扩散层，且所述扩散层包括所述第二上表面。
  14. 如权利要求11所述的扩散片结构，其特征在于，所述扩散膜更包括一有机物层，所述第二部分形成所述有机物层，且所述有机物层包括所述第二下表面，所述第二下表面与所述第一上表面之间产生一分子间作用力。
  15. 如权利要求11所述的扩散片结构，其特征在于，所述扩散膜更包括一有机物层及一载体层，所述第二部分形成所述有机物层，且所述有机物层包括所述第二下表面，且所述第二下表面与所述第一上表面之间产生一分子间作用力；且所述载体形成所述载体层。
  16. 一种扩散片结构，其特征在于，包括：
    一透明基板，包括一第一上表面及一第一下表面；以及
    一扩散膜，设置于所述透明基板上，且包括一扩散层、一有机物层及多个纳米扩散颗粒，并具有一第二上表面及一第二下表面，所述第二下表面与所述第一上表面相连接；
    其中，所述各纳米扩散颗粒更包括一第一部分及一第二部分，所述第一部分形成所述扩散层，且所述扩散层包括所述第二上表面，所述第二部分形成所述有机物层，且所述有机物层包括所述第二下表面，所述第二下表面与所述第一上表面之间产生一分子间作用力；
    其中，来自一背光模块的一光线由所述第一下表面进入所述透明基板，由所述第一上表面离开所述透明基板，且所述光线由所述第二下表面进入所述扩散膜并由所述第二上表面离开所述扩散膜，并照射至所述多个纳米扩散颗粒后扩散，且所述多个纳米扩散颗粒于所述扩散膜上传递来自所述背光模块的一热能。
  17. 如权利要求16所述的扩散片结构，其特征在于，所述第一部分包括金属或碳，所述第二部分包括一有机物。
  18. 如权利要求16所述的扩散片结构，其特征在于，所述多个纳米扩散颗粒之一粒径小于20纳米。
  19. 如权利要求16所述的扩散片结构，其特征在于，所述多个纳米扩散颗粒包括银、金、氧化铝、铜、锡、碳中的一项或数项。
  20. 如权利要求16所述的扩散片结构，其特征在于，所述多个纳米扩散颗粒包括树脂材料。
PCT/CN2019/118374 2019-08-14 2019-11-14 扩散片结构 WO2021027159A1 (zh)

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