WO2020098189A1 - 一种柔性直下式背光源及其显示装置 - Google Patents

一种柔性直下式背光源及其显示装置 Download PDF

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Publication number
WO2020098189A1
WO2020098189A1 PCT/CN2019/077880 CN2019077880W WO2020098189A1 WO 2020098189 A1 WO2020098189 A1 WO 2020098189A1 CN 2019077880 W CN2019077880 W CN 2019077880W WO 2020098189 A1 WO2020098189 A1 WO 2020098189A1
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WO
WIPO (PCT)
Prior art keywords
bubble
type backlight
flexible
flexible direct
direct type
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PCT/CN2019/077880
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English (en)
French (fr)
Inventor
樊勇
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深圳市华星光电半导体显示技术有限公司
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Publication of WO2020098189A1 publication Critical patent/WO2020098189A1/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
    • G02F1/01—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
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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 invention relates to the field of display technology, in particular to a flexible direct-type backlight and its display device.
  • the backlight of the light-emitting diode (English: Light-Emitting Diode, referred to as LED) is divided into an edge light type and a direct type.
  • the edge-lit backlight is a backlight made by setting a linear or point light source on the side of a specially designed light guide plate.
  • the principle of the light guide plate is to use the dot distribution on the bottom of the light guide acrylic plate to destroy the interference phenomenon of light, and uniformly convert the linear light source into a surface light source. Its role is to guide the scattering direction of the light and make the light distribution more uniform so that it cannot be seen from the front.
  • the shadow to the reflection point is used to improve the brightness of the panel and ensure the uniformity of the brightness of the panel.
  • the excellent light guide plate has a great influence on the backlight.
  • the light guide plate can be made into double-sided, three-sided or even four-sided according to actual needs.
  • the direct-type backlight is to place the light source (LED chip array) and the printed circuit board at the bottom of the backlight. After the light is emitted from the LED, it passes through the bottom reflective sheet, and then is evenly emitted through the surface diffusion plate and brightness enhancement film.
  • the traditional liquid crystal panel uses a glass substrate. Since it cannot bend freely with a large curvature, it can no longer meet people's needs, so a flexible liquid crystal panel needs to be developed. With the development of the times, the development of liquid crystal on flexible substrates has put forward higher requirements for the flexibility and variable curvature of the backlight. Due to the high thickness of the light boxes and the support of the nails between the light boxes, the traditional direct backlights are prone to deform when the pins are bent repeatedly, changing the height of the local light boxes, resulting in various traces caused by uneven display brightness . Therefore, there is a need to find a direct-lit backlight source to meet the free curvature of large curvature to avoid the phenomenon of various traces caused by uneven brightness of the display.
  • An object of the present invention is to provide a flexible direct-type backlight and its display device, which can solve the problem that the current direct-type backlight cannot freely bend with a large curvature.
  • one embodiment of the present patent provides a flexible direct-type backlight including a graphene heat dissipation coating, a flexible circuit board, a miniature light-emitting diode, a bubble glue layer, and an optical film layer.
  • the flexible circuit board is disposed on the graphene heat dissipation coating; the mini LED is disposed on the flexible circuit board; the bubble adhesive layer is disposed on the mini LED; the optical film layer is disposed Above the bubble gum layer. At least two bubbles are provided inside the bubble gum layer.
  • composition material of the bubble adhesive layer includes at least one of silica gel, epoxy adhesive, and acrylic.
  • composition material of the bubble gum layer further includes at least one of a mixture of UV light curing agent, inorganic particles and inert gas.
  • bubbles are formed by adding N 2 or CO 2 gas to the glue layer during the process of stirring the colloid of the bubble glue layer.
  • the diameter of the bubbles ranges from 1-10 microns.
  • the mini light emitting diodes include two or more than two
  • the mini light emitting diodes form a rectangular array and are evenly arranged on the flexible circuit board.
  • the optical film layer includes a diffusion sheet, a prism sheet and a brightness enhancement film arranged in sequence.
  • the diffusion sheet is disposed on the bubble gum layer of the flexible direct backlight; the prism sheet is disposed on the diffusion sheet; and the brightness enhancement film is disposed on the prism sheet.
  • the flexible circuit board is made of polyimide or polyester film as a base material.
  • Another embodiment of the present patent further provides a display device including the flexible direct-type backlight and the flexible liquid crystal screen according to the present invention, wherein the flexible liquid crystal screen is adhered to the flexible direct-light through adhesive Type backlight above.
  • the constituent material of the adhesive glue includes one of silica gel, epoxy glue and acrylic, and at least one of UV light curing agent, inorganic particles and inert gas.
  • the invention relates to a flexible direct type backlight and its display device.
  • the thickness of the adhesive layer secondly, due to the presence of bubbles, it can improve the thermal insulation properties of the adhesive layer, increase the thermal resistance, reduce the heat transferred from the backlight to the LCD screen, lower the temperature of the LCD screen, increase the viscosity of the liquid crystal material, and reduce light leakage; finally, Due to the existence of the bubble adhesive layer, the flexibility of the backlight can be improved. In the bent state, due to the good shrinkage of the bubble, it can well offset the amount of material deformation caused by the bending of a part of the material, so that the backlight can meet a greater bending curvature .
  • FIG. 1 is a schematic structural diagram of a flexible direct-type backlight of the present invention.
  • FIG. 2 is a schematic structural view of the flexible direct type backlight of the present invention in a bent state.
  • FIG. 3 is a schematic diagram of the structure of the display device of the present invention.
  • the logo in the picture is as follows:
  • a flexible direct-type backlight provided by the present invention includes a graphene heat dissipation coating 1, a flexible circuit board 2, a mini LED 3, a bubble adhesive layer 4 and an optical film layer 5 arranged in this order.
  • the graphene which is a constituent material of the graphene heat dissipation coating 1, is a two-dimensional carbon nanomaterial composed of carbon atoms and sp2 hybrid orbits, and formed into a hexagonal honeycomb lattice. Since graphene has very good thermal conductivity, it can transfer the heat generated by the backlight to the outside world.
  • the flexible circuit board 2 (English full name: Flexible Printed Circuit, FPC for short) is disposed on the graphene heat dissipation coating 1.
  • the flexible circuit board 2 is made of polyimide or polyester film as a base material. Therefore, the flexible circuit board 2 has the characteristics of high wiring density, light weight, thin thickness, and good bendability, and can meet the requirements of large curvature.
  • the mini LED 3 is arranged on the flexible circuit board 2.
  • the mini LEDs 3 include two or more than two, forming a rectangular array, which are evenly arranged on the flexible circuit board 2. Thus, a uniform surface light source is formed, which emits light uniformly and avoids light leakage.
  • the bubble glue layer 4 is disposed on the mini LED 3. At least two bubbles 41 are provided inside the bubble gum layer 4, specifically, the bubble 41 is formed by adding N2 or CO2 gas to the glue layer during the process of stirring the colloid of the bubble gum layer 4.
  • the presence of the bubble 41 can reflect the light emitted by the mini LED 3 when passing through the bubble adhesive layer 4, thereby effectively diffusing the light emitted by the mini LED 3 and reducing the thickness of the bubble adhesive layer 4;
  • the bubble adhesive layer 4 can improve the thermal insulation properties of the bubble adhesive layer 4, increase the thermal resistance, reduce the heat transferred from the backlight to the LCD screen, lower the temperature of the LCD screen, increase the viscosity of the liquid crystal material, reduce light leakage;
  • the bubble adhesive layer has a very strong Flexibility can improve the flexibility of the backlight. In the bent state, due to the good shrinkage of the bubbles, it can well offset the amount of material deformation caused by the bending of some materials, so that the backlight can meet a greater bending curvature.
  • the colloidal composition material of the bubble glue layer 4 includes at least one of silica gel, epoxy glue and acrylic, so that the bubble glue layer 4 can play a good bonding function. At least one of a mixture of a UV photocuring agent, inorganic particles, and an inert gas may be added to the composition material. Thereby, the oxidation of the bubble gum layer 4 can be prevented, and the service life of the bubble gum layer 4 can be extended.
  • the diameter of the bubble 41 is in the range of 1-10 microns. If the diameter of the bubble 41 is greater than 10 microns, the effect of total reflection cannot be achieved; if the diameter of the bubble 41 is less than 1 microns, the effect of improving the thermal insulation properties of the bubble glue layer 4 cannot be achieved.
  • the optical film layer 5 is disposed above the bubble gum layer 4.
  • the optical film layer 5 includes a diffusion sheet, a prism sheet, and a brightness enhancement film arranged in sequence.
  • the diffusion sheet is arranged on the bubble adhesive layer of the flexible direct-type backlight.
  • the diffusion sheet is mainly added to the diffusion film substrate with chemical particles as scattering particles, and the light will continue to pass through the diffusion sheet It passes through two media with different refractive indexes, and at the same time, many rays of light will be refracted, reflected and scattered, which will cause the effect of optical diffusion.
  • the prism sheet is arranged on the diffusion sheet.
  • the light emitted by the mini LED 3 passes through the prism sheet, only the light within a certain angle range can be emitted by refraction, and the rest of the light is not satisfied Refraction conditions are reflected back to the light source by the edge of the prism, and then re-emitted by the reflection sheet at the bottom of the light source.
  • the light in the mini LED 3 is continuously recycled under the action of the prism structure, and the light that originally diverged in all directions is controlled to a certain angle range after passing through the prism film, thereby achieving axial brightness enhancement effect.
  • the brightness enhancing film is disposed on the prism sheet.
  • the arrangement of the optical film layer 5 is mainly to improve the uniformity and brightness of the backlight.
  • the present invention also provides a display device, including the above-mentioned flexible direct backlight and the flexible liquid crystal screen 6.
  • the flexible liquid crystal screen 6 is attached to the flexible direct-type backlight by adhesive.
  • composition material of the adhesive includes at least one of silica gel, epoxy glue and acrylic, and at least one of UV light curing agent, inorganic particles and inert gas.

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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)
  • Planar Illumination Modules (AREA)
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Abstract

一种柔性直下式背光源及其显示装置，包括依次设置的石墨烯散热涂层（1）、柔性电路板（2）、迷你发光二极管（3）、气泡胶层（4）、光学膜层（5）以及柔性液晶屏（6），气泡胶层（4）内部设有至少两个气泡（41）。通过在光学膜层（5）及迷你发光二极管（3）之间设置具有微小气泡（41）的气泡胶层（4），可使迷你发光二极管（3）发出的光经过气泡胶层（4）时发生反射，从而有效扩散迷你发光二极管（3）发出的光，降低气泡胶层（4）的厚度；可提升气泡胶层（4）的隔热特性，增加热阻，降低从背光传递到液晶屏的热量，降低液晶屏温度，提高液晶材料的黏度，减少漏光；可提升背光源的柔韧特性，在弯曲状态下，由于气泡收缩性好，能够抵消一部分材料弯曲引起的材料变形量，从而使背光源满足更大的弯曲曲率。

Description

一种柔性直下式背光源及其显示装置 技术领域
本发明涉及显示技术领域，具体涉及一种柔性直下式背光源及其显示装置。
 背景技术
目前，发光二极管（英语：Light-Emitting Diode，简称LED）的背光源分为侧光式与直下式。侧光式背光源是将线形或点状光源设置在经过特殊设计的导光板的侧边做成的背光源。导光板原理是利用导光压克力板底的网点分布破坏光的干涉现象，将线光源均匀转换成面光源，其作用在于引导光的散射方向，让光的分布更加均匀使从正面看不到反射点的影子，用来提高面板的亮度，并确保面板亮度的均匀性，其中导光板的优良对背光影响甚大。导光板根据实际使用的需要，又可做成双边式、三边式甚至四边式。
相较于测光式背光源，由于直下式背光源不需要导光板，因此其制备工艺也是相对简单的。直下式背光源是将光源(LED晶片阵列)及印刷电路板置于背光源底部，光线从LED射出后，通过底部的反射片，再通过表面的扩散板、增亮膜均匀地射出。
 技术问题
传统液晶面板采用玻璃材质基板，由于无法进行大曲率的自由弯曲，已经无法满足人们的需求，因此需要开发柔性液晶面板。随着时代的发展，柔性基板的液晶的开发，对背光的柔性和可变曲率下提出了更高的要求。传统的直下式背光由于灯箱厚度高，且灯箱之间具有支钉支撑，在反复弯折的情况下，支钉容易产生变形 ，改变局部灯箱高度，从而出现显示器亮度不均造成各种痕迹的现象。因此，需要寻找一种直下式背光源以满足大曲率的自由弯曲，避免出现显示器亮度不均造成各种痕迹的现象。
 技术解决方案
本发明的一个目的是提供一种柔性直下式背光源及其显示装置，其能够解决目前直下式背光源无法满足大曲率的自由弯曲的问题。
为了解决上述问题，本专利的一个实施方式提供一种柔性直下式背光源，包括石墨烯散热涂层、柔性电路板、迷你发光二极管、气泡胶层以及光学膜层。所述柔性电路板设置于所述石墨烯散热涂层上面；所述迷你发光二极管设置于所述柔性电路板上面；所述气泡胶层设置于所述迷你发光二极管上面；所述光学膜层设置于所述气泡胶层上面。其中所述气泡胶层内部设有至少两个气泡。
进一步地，其中所述气泡胶层的组成材料包括硅胶、环氧胶以及亚克力中的至少一种。
进一步地，其中所述气泡胶层的组成材料还包括UV光固化剂、无机颗粒以及惰性气体的混合物中的至少一种。
进一步地，其中所述气泡是在搅拌所述气泡胶层的胶体的过程中往胶层中加入N 2或CO 2气体形成的。
进一步地，其中所述气泡的直径范围为1-10微米。
进一步地，其中所述迷你发光二极管包括2个及2个以上的数量，所述迷你发光二极管组成一个矩形阵列，均匀设置在所述柔性电路板上面。
进一步地，其中所述光学膜层包括依次设置的扩散片、棱镜片以及增亮膜。所述扩散片设置于所述柔性直下式背光源的气泡胶层上；所述棱镜片设置于所述扩散片上；所述增亮膜设置于所述棱镜片上。
进一步地，其中所述柔性电路板是由聚酰亚胺或聚酯薄膜为基材制成的。
本专利的另一个实施方式还提供一种显示装置，包括上述本发明涉及的的所述柔性直下式背光源和柔性液晶屏，其中所述柔性液晶屏通过粘结胶贴合于所述柔性直下式背光源上面。
进一步地，其中所述粘结胶的组成材料包括硅胶、环氧胶以及亚克力中的一种，以及UV光固化剂、无机颗粒以及惰性气体中的至少一种。
 有益效果
本发明涉及的一种柔性直下式背光源及其显示装置。首先，通过在光学膜及迷你发光二极管之间设置具有微小气泡的气泡胶层，可以使迷你发光二极管发出的光经过气泡胶层时发生反射，从而可以有效扩散迷你发光二极管发出的光，降低气泡胶层厚度；其次，由于气泡的存在，可提升胶层的隔热特性，增加热阻，降低从背光传递到液晶屏的热量，降低液晶屏温度，提高液晶材料的黏度，减少漏光；最后，由于气泡胶层存在，可提升背光源的柔韧特性，在弯曲状态下，由于气泡的收缩性好，可以很好的抵消一部分材料弯曲引起的材料变形量，可使背光源满足更大的弯曲曲率。
 附图说明
下面结合附图和实施例对本发明作进一步解释。
图1是本发明的柔性直下式背光源的结构示意图。
图2是本发明的柔性直下式背光源弯曲状态下的结构示意图。
图3是本发明显示装置的结构示意图。
图中标识如下：
1、石墨烯散热涂层                       2、柔性电路板
3、迷你发光二极管                       4、气泡胶层
5、光学膜层                             6、柔性液晶屏
41、气泡
 本发明的最佳实施方式
以下实施例的说明是参考附加的图式，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「顶」、「底」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发明，而非用以限制本发明。
实施例1
如图1所示，本发明提供的一种柔性直下式背光源，其中包括依次设置的石墨烯散热涂层1、柔性电路板2、迷你发光二极管3、气泡胶层4以及光学膜层5。
其中所述石墨烯散热涂层1的组成材料石墨烯（Graphene）是一种由碳原子以sp²杂化轨道组成六角型呈蜂巢晶格的二维碳纳米材料。由于石墨烯具有非常好的热传导性能，因此能够很好的将背光源产生的热量向外界传送。
其中所述柔性电路板2（英文全称：Flexible Printed Circuit，简称FPC）设置于所述石墨烯散热涂层1上面。所述柔性电路板2是由聚酰亚胺或聚酯薄膜为基材制成的。因此柔性电路板2具有配线密度高、重量轻、厚度薄、弯折性好的特点，能够满足大曲率的要求。
其中所述迷你发光二极管3设置于所述柔性电路板2上面。其中所述迷你发光二极管3包括2个及2个以上的数量，组成一个矩形阵列，均匀设置在所述柔性电路板2上面。由此形成一个均匀的面光源，均匀发光，避免漏光。
如图1、图2所示，所述气泡胶层4设置于所述迷你发光二极管3上面。其中所述气泡胶层4内部设有至少两个气泡41，具体地，其中所述气泡41是在搅拌所述气泡胶层4的胶体的过程中往胶层中加入N2或CO2气体形成的。首先，气泡41的存在可以使迷你发光二极管3发出的光经过气泡胶层4时发生反射，从而可以有效扩散迷你发光二极管3发出的光，降低气泡胶层4厚度；其次，由于气泡41的存在，可提升气泡胶层4的隔热特性，增加热阻，降低从背光传递到液晶屏的热量，降低液晶屏温度，提高液晶材料的黏度，减少漏光；最后，由于气泡胶层具有极强的柔韧性，可提升背光源的柔韧特性，在弯曲状态下，由于气泡的收缩性好，可以很好的抵消一部分材料弯曲引起的材料变形量，可使背光源满足更大的弯曲曲率。
其中所述气泡胶层4的胶体组成材料包括硅胶、环氧胶以及亚克力中的至少一种，由此气泡胶层4可以起到很好的粘结功能。所述组成材料中还可以添加UV光固化剂、无机颗粒以及惰性气体的混合物中的至少一种。由此，由此可以防止气泡胶层4的氧化，延长气泡胶层4的使用期限。
其中所述气泡41的直径范围为1-10微米。如果气泡41直径大于10微米，无法达到全反射的效果；如果气泡41直径小于1微米，无法达到提升气泡胶层4的隔热特性的效果。
其中所述光学膜层5设置于所述气泡胶层4上面。其中所述光学膜层5包括依次设置的扩散片、棱镜片以及增亮膜。所述扩散片设置于所述柔性直下式背光源的气泡胶层上， 扩散片主要是在扩散膜基材中，加入一颗颗的化学颗粒，作为散射粒子，光线在经过扩散片时会不断的在两个折射率相异的介质中穿过，在此同时光线就会发生许多折射、反射与散射的现象，如此便造成了光学扩散的效果。所述棱镜片设置于所述扩散片上，迷你发光二极管3射入的光在通过棱镜片时，只有入射光在某一角度范围之内的光才可以通过折射作用出射，其余的光因不满足折射条件而被棱镜边沿反射回光源，再由光源底部的反射片作用而重新出射。这样，迷你发光二极管3中的光线在棱镜结构的作用下，不断的循环利用，原本向各个方向发散的光线在通过棱镜膜后，被控制到一定的角度范围内，从而达到轴向亮度增强的效果。所述增亮膜设置于所述棱镜片上。综上所述，光学膜层5的设置主要是提升背光源的的均匀性和亮度。
实施例2
以下仅就本实施例与第一实施例间的相异之处进行说明，而其相同之处则在此不再赘述。
如图3所示，本发明还提供一种显示装置，包括上述的柔性直下式背光源以及柔性液晶屏6。所述柔性液晶屏6通过粘结胶贴合于所述柔性直下式背光源上面。
其中所述粘结胶的组成材料包括硅胶、环氧胶以及亚克力中的至少一种，以及UV光固化剂、无机颗粒以及惰性气体中的至少一种。
以上仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种柔性直下式背光源，其中，包括：
    石墨烯散热涂层，
    柔性电路板，所述柔性电路板设置于所述石墨烯散热涂层上面；
    迷你发光二极管，所述迷你发光二极管设置于所述柔性电路板上面；
    气泡胶层，所述气泡胶层设置于所述迷你发光二极管上面，所述气泡胶层内部设有至少两个气泡，以及
    光学膜层，所述光学膜层设置于所述气泡胶层上面。
  2. 根据权利要求1所述的柔性直下式背光源，其中，所述气泡胶层的组成材料包括硅胶、环氧胶以及亚克力中的至少一种。
  3. 根据权利要求2所述的柔性直下式背光源，其中，所述气泡胶层的组成材料还包括UV光固化剂、无机颗粒以及惰性气体的混合物中的至少一种。
  4. 根据权利要求1所述的柔性直下式背光源，其中，所述气泡是在搅拌所述气泡胶层的胶体的过程中往胶层中加入N 2或CO 2气体形成的。
  5. 根据权利要求1所述的柔性直下式背光源，其中，所述气泡的直径范围为1-10微米。
  6. 根据权利要求1所述的柔性直下式背光源，其中，所述迷你发光二极管包括2个及2个以上的数量，所述迷你发光二极管组成一个矩形阵列，均匀设置在所述柔性电路板上面。
  7. 根据权利要求1所述的柔性直下式背光源，其中，所述光学膜层包括：
    扩散片，所述扩散片设置于所述柔性直下式背光源的气泡胶层上；
    棱镜片，所述棱镜片设置于所述扩散片上；以及
    增亮膜，所述增亮膜设置于所述棱镜片上。
  8. 根据权利要求1所述的柔性直下式背光源，其中，所述柔性电路板是由聚酰亚胺或聚酯薄膜为基材制成的。
  9. 一种显示装置，其中，包括：
    柔性直下式背光源，所述柔性直下式背光源为权利要求1-8所述的柔性直下式背光源；以及
    柔性液晶屏，所述柔性液晶屏通过粘结胶贴合于所述柔性直下式背光源上面。
  10. 根据权利要求9所述的一种显示装置，其中，所述粘结胶的组成材料包括硅胶、环氧胶以及亚克力中的一种，以及UV光固化剂、无机颗粒以及惰性气体中的至少一种。
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