WO2014110770A1 - 光导入系统、侧入式背光模组及液晶显示器 - Google Patents

光导入系统、侧入式背光模组及液晶显示器 Download PDF

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Publication number
WO2014110770A1
WO2014110770A1 PCT/CN2013/070633 CN2013070633W WO2014110770A1 WO 2014110770 A1 WO2014110770 A1 WO 2014110770A1 CN 2013070633 W CN2013070633 W CN 2013070633W WO 2014110770 A1 WO2014110770 A1 WO 2014110770A1
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WO
WIPO (PCT)
Prior art keywords
light
incident
emitting
ambient
backlight module
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PCT/CN2013/070633
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English (en)
French (fr)
Inventor
胡哲彰
张光耀
宁超
樊勇
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深圳市华星光电技术有限公司
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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 US13/819,342 priority Critical patent/US9435928B2/en
Publication of WO2014110770A1 publication Critical patent/WO2014110770A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0028—Light guide, e.g. taper
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer

Definitions

  • the invention belongs to the field of liquid crystal display, and in particular to a light introduction system, a side-in type backlight module and a liquid crystal display.
  • the backlight module used in the TFT-LCD display is a common light-emitting diode (LED) or a fluorescent tube, both of which use electricity as a driving energy source for illumination, but on the entire backlight module.
  • the energy consumption of its backlight source accounts for about 80%, and its energy consumption is very huge under long-term use.
  • types of power generation currently used are oil-fired power generation, coal-fired power generation and nuclear power generation, which bring environmental problems such as greenhouse effect and nuclear pollution.
  • Ambient light in nature, such as sunlight, is a natural energy source that is green and environmentally friendly. Its spectrum contains the visible light band light required by the backlight source.
  • the backlight module is designed to collect sunlight from the ambient light collection system.
  • FIG. 1 is a schematic structural view of a light introduction system of a conventional side-lit backlight module.
  • the light introduction system 1 absorbs ambient light CL by using the ambient light collection system 10 and generates absorption light SL, and the absorption light SL is introduced.
  • the light exit end 21 of each optical fiber 20 is adjacent to a light incident surface 31 of the light guide plate 30, and the light emitted from each light exit end 21 can be incident into the light guide plate 30 through the light incident surface 31.
  • the light emitted from the light-emitting end 21 can be used as a backlight source in the backlight module 1.
  • the main problem of the structure of the side-lit backlight module is that the light-emitting end 21 of the optical fiber 20 has a small light-emitting angle (usually within 60 degrees), and the light-emitting end 21 of the plurality of optical fibers 20 is adjacent to the light-incident surface of the light guide plate 30.
  • the arrangement is 31, if the spacing between the adjacent two light-emitting ends 21 is large, a phenomenon of uneven brightness and darkness may occur on the light-incident surface 31 of the light guide plate 30, thereby affecting the optical taste of the backlight module. If the spacing between adjacent two light-emitting ends 21 is reduced, it means that more fibers 20 need to be used, which increases the cost and the manufacturing difficulty.
  • an object of the present invention is to provide a light-introducing system for a side-entry backlight module, which includes: an ambient light collecting system that faces an ambient light, an absorption center Ambient light and absorbing light; a plurality of light guiding devices, each light guiding device having an light incident end and an light exit end, the light incident end being adjacent to the ambient light collecting system, the absorbing light entering the inlet
  • the light-emitting end is guided to the light-emitting end;
  • the wedge-shaped light-guiding strip has a light-emitting side surface and a light-incident side surface connected to the light-emitting side surface, and the light-incident side surface is a wider side surface connected to the oblique side surface.
  • the light-emitting side is adjacent to the oblique side, and the light-emitting side is adjacent to a light-incident surface of the light guide plate, and the light-emitting ends of the plurality of light-guiding devices are adjacent to the light-incident side.
  • Another object of the present invention is to provide a side-lit backlight module, including a back plate, a light guide plate, and an optical film.
  • the light guide plate includes a light incident surface and a bottom surface that is oppositely disposed and connected to the light incident surface.
  • the edge-lit backlight module further includes a light introduction system, and the light is introduced
  • the system includes: an ambient light collecting system that faces ambient light, absorbs the ambient light and generates absorbed light; and a plurality of light guiding devices, each light guiding device has an light incident end and an light exit end, and the light incident end is adjacent to In the ambient light collecting system, the absorbed light enters the light-input end and is guided to the light-emitting end; the wedge-shaped light-guiding strip has a light-emitting side surface and a light-incident side connected to the light-emitting side surface.
  • the light-emitting side is connected to the wider side of the oblique side, the light-emitting side is opposite to the oblique side, the light-emitting side is adjacent to the light-incident surface, and the light-emitting ends of the plurality of light guiding devices are adjacent to the light-emitting end Enter the light side.
  • Another object of the present invention is to provide a liquid crystal display including a display panel, a back plate, a light guide plate and an optical film.
  • the light guide plate includes a light incident surface, a bottom surface opposite to the light incident surface, and a light-emitting surface, the backing plate is disposed under the bottom surface, the optical film is disposed on the light-emitting surface, and the display panel is disposed on the optical film, wherein the liquid crystal display further
  • the light-introducing system includes: an ambient light collecting system that faces ambient light, absorbs the ambient light and generates absorbed light; and a plurality of light guiding devices, each light guiding device has an light-input end and a light-emitting end The light-injecting end is adjacent to the ambient light collecting system, the absorbed light enters the light-input end and is guided to the light-emitting end; the wedge-shaped light guiding strip has a light-emitting side, and the light-emitting side a light-incident side surface connected to the side, the light-incident side surface is a wider side surface connected to the oblique side surface, the light-emitting side surface is opposite
  • the light guiding device is an optical fiber.
  • the inclined side surface, the narrow side surface opposite to the light incident side surface, the bottom surface connected to the oblique side surface, and the top surface opposite to the bottom surface are each provided with a reflective layer.
  • the reflective layer is a metal reflective layer or a dielectric reflective layer.
  • a plurality of dots are distributed on the oblique side. Further, the shape of the dots is cylindrical or hemispherical.
  • the material of the wedge-shaped light guiding strip is PMMA.
  • the side-entry backlight module and the liquid crystal display of the present invention since the light-incident side of the wedge-shaped light guiding strip is wider, the light-emitting ends of the plurality of optical fibers can be accommodated on the light-incident side.
  • the narrower side opposite to the side of the light entrance does not require the placement of an optical fiber, which can be narrower, thereby saving material and reducing weight.
  • the oblique side of the wedge-shaped light guiding strip forms an angle with most of the light entering the wedge-shaped light guiding strip, the light is more easily scattered to the dot on the oblique side surface to be scattered, thereby reducing the light in the wedge shape.
  • the propagation path in the light guide strip to reduce absorption losses.
  • the light emitted from the light-emitting ends of the plurality of fibers can be uniformly incident into the light guide plate from the light-emitting side, thereby reducing the uneven brightness of the light-incident surface, and improving the side.
  • the optical taste of the incorporated backlight module is not limited to:
  • FIG. 1 is a schematic structural view of a conventional side-entry backlight module.
  • 2 is a schematic view of a light introduction system of an embodiment of the present invention.
  • Figure 3 is a front elevational view of a wider side of a light guide strip in accordance with an embodiment of the present invention.
  • 4 is a schematic view showing another shape of a halftone dot on a slope side of a light guiding strip according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a side-entry backlight module according to an embodiment of the invention.
  • Figure 6 is a schematic illustration of a liquid crystal display according to an embodiment of the present invention.
  • the light introduction system 1 includes: an ambient light collection system 10, a plurality of optical fibers 20.
  • the ambient light collecting system 10 faces and absorbs the ambient light CL, and then converts the ambient light CL into the absorbed light SL.
  • the ambient light CL can be light emitted by sunlight, light or other luminous objects, and absorbed.
  • the wavelength of the light SL is in the wavelength range of visible light, that is, the absorbed light SL can be used as a backlight source in the backlight module.
  • Each of the optical fibers 20 has a light exiting end 21 and an light incident end 22, and the light incident ends 22 of the respective optical fibers 20 are converged into a bundle and adjacent to the ambient light collecting system 10.
  • the light guide plate 30 has a light incident surface 31 and a light exit surface 33. The light entering the light incident surface 31 is mixed in the light guide plate 30 and then emitted from the light exit surface 33.
  • the wedge-shaped light guiding strip 40 has a light-emitting side surface 401 and a light-incident side surface 402 connected to the light-emitting side surface 401.
  • the light-incident side surface 402 is a wider side surface connected to the oblique side surface 403, and faces and is adjacent to the light-emitting side surface 401 of the oblique side surface 403.
  • the light-incident surface 31 is provided; the material of the wedge-shaped light-guiding strip 40 may be PMMA (polymethylmethacrylate) or the like.
  • the light-emitting ends 21 of the plurality of optical fibers 20 are disposed adjacent to the light-incident side 402. It is noted that the number and arrangement of the light-emitting ends 21 are not limited to those shown in FIG. 2, but are based on actual conditions. To determine the number and arrangement of the optical ends 21.
  • the absorption light SL emitted by the ambient light collecting system 10 enters the optical fiber 20 through the light-injecting end 22 of each of the optical fibers 20 to be transmitted to the light-emitting end 21, wherein the optical fiber 20 is an excellent light guiding device, and the light is in the optical fiber 20.
  • the energy loss is very low, so that a sufficient amount of light can be ensured to reach the light exit end 21.
  • the light emitted from the light-emitting end 21 enters the wedge-shaped light guiding strip 40, is mixed in the wedge-shaped light guiding strip 40, and is emitted from the light-emitting side surface 401.
  • the wedge-shaped light guiding strip 40 further includes a narrower side surface 404 opposite to the light-incident side surface 402, and a bottom surface 405 and a top surface 406 which are oppositely disposed and connected to the inclined side surface 403.
  • the inclined side surface 403, the narrower side surface 404, the bottom surface 405 and the top surface 406 are each provided with a reflective layer 50.
  • the reflective layer 50 is used to reflect light incident on the surface having the reflective layer 50 back into the wedge-shaped light guiding strip 40 so that more light is emitted from the light-emitting side surface 401.
  • the reflective layer 50 of the present embodiment may be, for example, a metal reflective layer or a dielectric reflective layer.
  • the material of the metal reflective layer may be, for example, a material having high reflectance in the visible light band, such as silver, gold, or aluminum.
  • the material of the high refractive index film layer in the dielectric reflective layer may be, for example, titanium dioxide (Ti0 2 ), hafnium oxide (Hf0 2 ), zirconium oxide (Zr0 2 ), or the like, and the material of the low refractive index film layer may be, for example, silicon dioxide ( Si0 2 ), aluminum oxide (A1 2 0 3 ), and the like.
  • a dot 60 is provided on the oblique side 403.
  • the light entering from the light incident side surface 402 hits the halftone point 60, it is scattered by the halftone dot 60. After the scattered light is reflected multiple times in the wedge light guiding strip 40, most of the light will eventually be emitted from the light exiting side surface 401.
  • the light emitted from the light-emitting side surface 401 can be uniformly distributed.
  • the uniformly distributed light is uniformly mixed into the light guide plate 30 from the light-incident surface 31, and then the light-emitting surface 33 is uniformly distributed.
  • the shape of the halftone dot 60 is cylindrical, but is not limited thereto.
  • the shape of the dot 60 can also be hemispherical.
  • the shape of the dots 60 can also be pyramidal or other shapes.
  • the light introduction system of the present embodiment is generally applied to a side-entry backlight module of a liquid crystal display.
  • an edge-lit backlight module and a liquid crystal display using the light introduction system of the present embodiment will be described. Referring to FIG.
  • the side-lit backlight module 2 includes a back plate 70 , a light guide plate 30 , an optical film 90 , and the light introduction system 1 of the above embodiment.
  • the light guide plate 30 includes a light incident surface 31 and is connected to the light incident surface 31 .
  • the bottom surface 32 and the light-emitting surface 33 are oppositely disposed.
  • the back plate 70 is disposed below the bottom surface 32, and the optical film 90 is disposed on the top surface 33.
  • the light emitted from the light introduction system 1 enters the light guide plate 30 through the light-incident surface 31 to be mixed. Uniform, and then uniformly mixed light is emitted from the light exit surface 33. Referring to FIG.
  • the display panel 80 is disposed on the side-lit backlight module 2 to form a complete liquid crystal display 3 , and the side-lit backlight module 2 provides light to the display panel 80 , so that the display panel 80 displays images.
  • the side-entry backlight module and the liquid crystal display of the present invention since the light-incident side of the wedge-shaped light guiding strip is wider, the light-emitting ends of the plurality of optical fibers can be accommodated on the light-incident side.
  • the narrower side opposite to the side of the light entrance does not require the placement of an optical fiber, which can be narrower, thereby saving material and reducing weight.
  • the oblique side of the wedge-shaped light guiding strip forms an angle with most of the light entering the wedge-shaped light guiding strip, the light is more easily scattered to the dot on the oblique side surface to be scattered, thereby reducing the light in the wedge shape.
  • the propagation path in the light guide strip to reduce absorption losses.
  • the shape and arrangement of the dots the light emitted from the light-emitting ends of the plurality of fibers can be uniformly incident into the light guide plate from the light-emitting side, thereby reducing the uneven brightness and darkness of the light-incident surface, and improving the side.
  • the optical taste of the incorporated backlight module since the oblique side of the wedge-shaped light guiding strip forms an angle with most of the light entering the wedge-shaped light guiding strip, the light is more easily scattered to the dot on the oblique side surface to be scattered, thereby reducing the light in the wedge shape.
  • the propagation path in the light guide strip to reduce absorption losses.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

提供一种光导入系统（1）、侧入式背光模组（2）及液晶显示器（3），该光导入系统（1）包括：环境光收集系统（10），其朝向环境光（CL），吸收环境光（CL）并产生吸收光（SL）；若干导光装置（20），每一导光装置（20）具有一入光端（22）及一出光端（21），入光端（22）邻近于环境光收集系统（10），吸收光进入入光端（22）并被导引至出光端（21）；楔形导光条（40），具有一出光侧面（401）、与出光侧面（401）相连的一入光侧面（402），入光侧面（402）为连接于斜侧面（403）的较宽侧面，出光侧面（401）相对于斜侧面（403），出光侧面（401）邻近于导光板（30）的一入光面（31），若干导光装置（20）的出光端（21）邻近于入光侧面（402）。该光导入系统（1）、侧入式背光模组（2）及液晶显示器（3），采用楔形导光条（40），可以节省材料并减轻重量，同时，减小入光面（31）的亮暗不均的现象，提高侧入式背光模组（2）的光学品味。

Description

说 明 书 光导入系统、 侧入式背光模组及液晶显示器 技术领域
本发明属于液晶显示领域， 具体地说， 是涉及一种光导入系统、 侧入式背 光模组及液晶显示器。
背景技术
现阶段 TFT-LCD显示器中的背光模组采用的背光光源的类别是常见的发 光二极管 （LED) 或是荧光灯管， 二者都是使用电力作为发光的趋动能源， 然 而在整个背光模组上其背光光源的能耗便占了 80%左右，在长时间使用之下其 能源的消耗是非常巨大的。 在目前所使用的发电类别中主要分为石油燃烧发 电、 煤炭燃烧发电及核能发电， 其会带来温室效应、 核污染等环境问题。 自然界中的环境光， 例如太阳光， 为绿色环保的自然能源， 其光谱中包含 背光光源所需的可见光波段的光， 在背光模组的设计上能够将太阳光使用环境 光收集系统收集起来， 并用导光装置， 例如光纤导入背光模组中作为背光光源 使用， 则可以大大减少电力的消耗。 如图 1所示为一种现有的侧入式背光模组的光导入系统结构示意图， 该光 导入系统 1利用环境光收集系统 10吸收环境光 CL并产生吸收光 SL, 吸收光 SL导入多条光纤 20中， 每条光纤 20的出光端 21邻近于导光板 30的一入光 面 31， 从各个出光端 21射出的光便可通过入光面 31射入导光板 30中， 在导 光板 30中混合均匀后经由出光面 33射出， 则从出光端 21射出的光便可以作 为背光模组 1中的背光光源。
上述侧入式背光模组的结构存在的主要问题是光纤 20的出光端 21的发光 角度较小 （通常在 60度以内）， 多条光纤 20的出光端 21邻近于导光板 30的 入光面 31排列时， 若相邻两个出光端 21之间的间距较大则在导光板 30的入 光面 31 会出现较明显的亮暗不均的现象， 从而影响背光模组的光学品味。 若 是减小相邻两个出光端 21之间的间距则意味着需要使用更多条光纤 20， 这样 会增加成本和制作难度。 发明内容 为了解决上述现有技术存在的问题， 本发明的目的在于提供一种光导入系 统， 用于侧入式背光模组中， 其中， 包括： 环境光收集系统， 其朝向环境光， 吸收所述环境光并产生吸收光； 若干导光装置， 每一导光装置具有一入光端及 一出光端， 所述入光端邻近于所述环境光收集系统， 所述吸收光进入所述入光 端并被导引至所述出光端； 楔形导光条， 具有一出光侧面、 与所述出光侧面相 连的一入光侧面， 所述入光侧面为连接于斜侧面的较宽侧面， 所述出光侧面相 对于所述斜侧面， 所述出光侧面邻近于导光板的一入光面， 所述若干导光装置 的出光端邻近于所述入光侧面。 本发明的另一目的在于提供一种侧入式背光模组， 包括背板、 导光板及光 学膜片， 所述导光板包括一入光面、 相对设置并与所述入光面相连的底面及出 光面，所述背板设于所述底面之下，所述光学膜片设于所述出光面之上，其中， 所述侧入式背光模组还包括光导入系统， 所述光导入系统包括： 环境光收集系 统， 其朝向环境光， 吸收所述环境光并产生吸收光； 若干导光装置， 每一导光 装置具有一入光端及一出光端， 所述入光端邻近于所述环境光收集系统， 所述 吸收光进入所述入光端并被导引至所述出光端；楔形导光条，具有一出光侧面、 与所述出光侧面相连的一入光侧面， 所述入光侧面为连接于斜侧面的较宽侧 面， 所述出光侧面相对于所述斜侧面， 所述出光侧面邻近于所述入光面， 所述 若干导光装置的出光端邻近于所述入光侧面。 本发明的另一目的在于提供一种液晶显示器， 包括显示面板、 背板、 导光 板及光学膜片， 所述导光板包括一入光面、 相对设置并与所述入光面相连的底 面及出光面，所述背板设于所述底面之下，所述光学膜片设于所述出光面之上， 所述显示面板设于所述光学膜片之上， 其中， 所述液晶显示器还包括光导入系 统， 所述光导入系统包括： 环境光收集系统， 其朝向环境光， 吸收所述环境光 并产生吸收光； 若干导光装置， 每一导光装置具有一入光端及一出光端， 所述 入光端邻近于所述环境光收集系统， 所述吸收光进入所述入光端并被导引至所 述出光端；楔形导光条，具有一出光侧面、与所述出光侧面相连的一入光侧面， 所述入光侧面为连接于斜侧面的较宽侧面， 所述出光侧面相对于所述斜侧面， 所述出光侧面邻近于所述入光面， 所述若干导光装置的出光端邻近于所述入光 侧面。 此外， 所述导光装置为光纤。 此外， 所述斜侧面、 与所述入光侧面相对的较窄侧面、 与所述斜侧面相连 的底面、 与所述底面相对的顶面均设有反射层。 此外， 所述反射层为金属反射层或介质反射层。 此外， 所述斜侧面上分布有多个网点。 此外， 所述网点的形状为圆柱形或半球形。 此外， 所述楔形导光条的材质为 PMMA。 根据本发明的光导入系统、 侧入式背光模组及液晶显示器， 由于楔形导光 条的入光侧面较宽， 可以容置多条光纤的出光端于入光侧面。 而与入光侧面相 对的较窄侧面则不需要放置光纤， 可以较窄， 从而节省材料， 减轻重量。另外， 由于楔形导光条的斜侧面与进入该楔形导光条中的大多数光线成一定的夹角， 这样使得光线更容易地打到斜侧面上的网点而被散射， 从而减少光线在楔形导 光条中的传播路径， 以减少吸收损耗。 此外， 通过合理设计网点的形状及排列 方式， 可以使多条光纤的出光端射出的光均匀地从出光侧面射入到导光板中， 减小入光面的亮暗不均的现象， 提高侧入式背光模组的光学品味。
附图说明 图 1是一种现有的侧入式背光模组的结构示意图。 图 2是本发明实施例的光导入系统的示意图。 图 3是本发明实施例的导光条的较宽侧面的正视图。 图 4是本发明实施例的导光条的斜侧面上的网点的另一种形状示意图。 图 5是本发明实施例的侧入式背光模组的示意图。
图 6是本发明实施例的液晶显示器的示意图。
具体实施方式 为了更好地阐述本发明所采取的技术手段及其效果， 以下结合本发明的实 施例及其附图进行详细描述， 其中， 相同的标号始终表示相同的部件。 参照图 2、 图 3， 该光导入系统 1包括： 环境光收集系统 10、 若干条光纤 20、 楔形导光条 40。 具体地讲， 环境光收集系统 10朝向并且吸收环境光 CL, 而后将环境光 CL转化为吸收光 SL, 值得注意的是， 环境光 CL可为太阳光、 灯光或其他发光物体发出的光， 吸收光 SL的波长处于可见光的波长范围内， 即该吸收光 SL能够作为背光模组中的背光光源使用。每条光纤 20具有一出光 端 21及一入光端 22， 各条光纤 20的入光端 22汇聚成一束后邻近于环境光收 集系统 10。 导光板 30具有一入光面 31及一出光面 33， 由入光面 31进入的光 在导光板 30中混合后由出光面 33射出。 楔形导光条 40具有一出光侧面 401、 与出光侧面 401相连的一入光侧面 402， 入光侧面 402为连接于斜侧面 403的 较宽侧面， 相对于斜侧面 403的出光侧面 401面向并邻近入光面 31设置； 楔 形导光条 40的材质可为 PMMA ( Polymethylmethacrylate , 聚甲基丙烯酸甲酯） 等。 在本实施例中， 若干条光纤 20的出光端 21邻近入光侧面 402设置， 值得 注意地是， 出光端 21 的数量及排列方式并不以图 2中所示为限， 而是根据实 际情况来确定出光端 21的数量及排列方式。 由环境光收集系统 10发出的吸收 光 SL通过各条光纤 20的入光端 22进入光纤 20中进而传导至出光端 21， 其 中， 光纤 20是一种优良的导光装置， 光在光纤 20中的能量损失非常低， 因此 可以保证足够的光量到达出光端 21。 由出光端 21射出的光进入楔形导光条 40 后， 在楔形导光条 40中进行混合后由出光侧面 401射出。 另外， 在本实施例中， 楔形导光条 40还包括与入光侧面 402相对的较窄 侧面 404、 相对设置并与斜侧面 403相连的底面 405及顶面 406。 为了使得进 入楔形导光条 40中的光最大化地由出光侧面 401射出，斜侧面 403、较窄侧面 404、底面 405及顶面 406均设有反射层 50。所述反射层 50用于将射到具有该 反射层 50的面上的光反射回楔形导光条 40中， 以使更多的光由出光侧面 401 射出。 本实施例的反射层 50例如可为金属反射层或介质反射层。 金属反射层的 材料例如可为银、 金、 铝等在可见光波段具有高反射率的材料。 介质反射层中 的高折射率膜层的材料例如可为二氧化钛 （Ti02)、 氧化铪 （Hf02)、 氧化锆 (Zr02)等，低折射率膜层的材料例如可为二氧化硅（Si02)、三氧化二铝 (A1203) 等。 在本实施例中， 为了使出光侧面 401射出的光呈现较为均匀的分布， 可在 斜侧面 403上设置网点 60。 当从入光侧面 402进入的光射到网点 60上时会被 网点 60散射， 经散射后的光在楔形导光条 40内经多次反射后绝大部分最终会 由出光侧面 401射出。 通过合理的设计网点 60的排列分布， 可以使由出光侧 面 401射出的光整体呈现较为均匀的分布，这些较为均匀分布的光由入光面 31 进入导光板 30中混合均匀， 而后由出光面 33射出， 这样经出光面 33射出的 光会更加均匀。 此外， 在本实施例中， 网点 60的形状为圆柱形， 但不限于此。 参照图 4， 网点 60的形状也可为半球形。 当然网点 60的形状也可为金字 塔形或其他形状。 本实施例的光导入系统通常应用于液晶显示器的侧入式背光模组中， 以下 将对使用了本实施例的光导入系统的侧入式背光模组及液晶显示器进行说明。 参照图 5， 侧入式背光模组 2包括背板 70、 导光板 30、 光学膜片 90及上 述实施例的光导入系统 1， 导光板 30包括一入光面 31、 与入光面 31相连的底 面 32及出光面 33相对设置， 背板 70设于底面 32的下方， 光学膜片 90置于 顶面 33之上， 光导入系统 1射出的光通过入光面 31进入导光板 30中混合均 匀， 而后混合均匀的光从出光面 33射出。 参照图 6，显示面板 80设于侧入式背光模组 2之上形成完整的液晶显示器 3， 则侧入式背光模组 2提供光给显示面板 80， 使得显示面板 80显示影像。 综上所述， 根据本发明的光导入系统、 侧入式背光模组及液晶显示器， 由 于楔形导光条的入光侧面较宽， 可以容置多条光纤的出光端于入光侧面。 而与 入光侧面相对的较窄侧面则不需要放置光纤， 可以较窄， 从而节省原料， 减轻 重量。 另外， 由于楔形导光条的斜侧面与进入该楔形导光条中的大多数光线成 一定的夹角， 这样使得光线更容易地打到斜侧面上的网点而被散射， 从而减少 光线在楔形导光条中的传播路径， 以减少吸收损耗。 此外， 通过合理设计网点 的形状及排列方式， 可以使多条光纤的出光端射出的光均匀地从出光侧面射入 到导光板中，减小入光面的亮暗不均的现象，提高侧入式背光模组的光学品味。
虽然本发明是参照其示例性的实施例被具体描述和显示的， 但是本领域的 普通技术人员应该理解， 在不脱离由权利要求限定的本发明的精神和范围的情 况下， 可以对其进行形式和细节的各种改变。

Claims

权利要求书
1、 一种光导入系统， 用于侧入式背光模组中， 其中， 包括： 环境光收集系统， 其朝向环境光， 吸收所述环境光并产生吸收光； 若干导光装置， 每一导光装置具有一入光端及一出光端， 所述入光端邻近 于所述环境光收集系统， 所述吸收光进入所述入光端并被导引至所述出光端； 楔形导光条， 具有一出光侧面、 与所述出光侧面相连的一入光侧面， 所述 入光侧面为连接于斜侧面的较宽侧面， 所述出光侧面相对于所述斜侧面， 所述 出光侧面邻近于导光板的一入光面， 所述若干导光装置的出光端邻近于所述入 光侧面。
2、 根据权利要求 1所述的光导入系统， 其中， 所述导光装置为光纤。
3、 根据权利要求 1所述的光导入系统， 其中， 所述斜侧面、 与所述入光 侧面相对的较窄侧面、 与所述斜侧面相连的底面、 与所述底面相对的顶面均设 有反射层。
4、 根据权利要求 1所述的光导入系统， 其中， 所述斜侧面上分布有多个 网点， 所述网点的形状为圆柱形。
5、 根据权利要求 1所述的光导入系统， 其中， 所述斜侧面上分布有多个 网点， 所述网点的形状为半球形。
6、 根据权利要求 1所述的光导入系统， 其中， 所述楔形导光条的材质为 PMMAo
7、 一种侧入式背光模组， 包括背板、 导光板及光学膜片， 所述导光板包 括一入光面、 相对设置并与所述入光面相连的底面及出光面， 所述背板设于所 述底面之下， 所述光学膜片设于所述出光面之上， 其中， 所述侧入式背光模组 还包括光导入系统， 所述光导入系统包括： 环境光收集系统， 其朝向环境光， 吸收所述环境光并产生吸收光； 若干导光装置， 每一导光装置具有一入光端及一出光端， 所述入光端邻近 于所述环境光收集系统， 所述吸收光进入所述入光端并被导引至所述出光端； 楔形导光条， 具有一出光侧面、 与所述出光侧面相连的一入光侧面， 所述 入光侧面为连接于斜侧面的较宽侧面， 所述出光侧面相对于所述斜侧面， 所述 出光侧面邻近于所述入光面， 所述若干导光装置的出光端邻近于所述入光侧 面。
8、 根据权利要求 7所述的侧入式背光模组， 其中， 所述导光装置为光纤。
9、 根据权利要求 7所述的侧入式背光模组， 其中， 所述斜侧面、 与所述 入光侧面相对的较窄侧面、 与所述斜侧面相连的底面、 与所述底面相对的顶面 均设有反射层。
10、 根据权利要求 7所述的侧入式背光模组， 其中， 所述斜侧面上分布有 多个网点， 所述网点的形状为圆柱形。
11、 根据权利要求 7所述的侧入式背光模组， 其中， 所述斜侧面上分布有 多个网点， 所述网点的形状为半球形。
12、 根据权利要求 7所述的侧入式背光模组， 其中， 所述楔形导光条的材 质为 PMMAo
13、 一种液晶显示器， 包括显示面板、 背板、 导光板及光学膜片， 所述导 光板包括一入光面、 相对设置并与所述入光面相连的底面及出光面， 所述背板 设于所述底面之下， 所述光学膜片设于所述出光面之上， 所述显示面板设于所 述光学膜片之上， 其中， 所述液晶显示器还包括光导入系统， 所述光导入系统 包括： 环境光收集系统， 其朝向环境光， 吸收所述环境光并产生吸收光； 若干导光装置， 每一导光装置具有一入光端及一出光端， 所述入光端邻近 于所述环境光收集系统， 所述吸收光进入所述入光端并被导引至所述出光端； 楔形导光条， 具有一出光侧面、 与所述出光侧面相连的一入光侧面， 所述 入光侧面为连接于斜侧面的较宽侧面， 所述出光侧面相对于所述斜侧面， 所述 出光侧面邻近于所述入光面， 所述若干导光装置的出光端邻近于所述入光侧 面。
14、 根据权利要求 13所述的液晶显示器， 其中， 所述导光装置为光纤。
15、 根据权利要求 13所述的液晶显示器， 其中， 所述斜侧面、 与所述入 光侧面相对的较窄侧面、 与所述斜侧面相连的底面、 与所述底面相对的顶面均 设有反射层。
16、 根据权利要求 13所述的液晶显示器， 其中， 所述斜侧面上分布有多 个网点， 所述网点的形状为圆柱形。
17、 根据权利要求 13所述的液晶显示器， 其中， 所述斜侧面上分布有多 个网点， 所述网点的形状为半球形。
18、 根据权利要求 13所述的液晶显示器， 其中， 所述楔形导光条的材质 为 PMMAo
PCT/CN2013/070633 2013-01-16 2013-01-17 光导入系统、侧入式背光模组及液晶显示器 WO2014110770A1 (zh)

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