WO2014113993A1 - 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
WO2014113993A1
WO2014113993A1 PCT/CN2013/071032 CN2013071032W WO2014113993A1 WO 2014113993 A1 WO2014113993 A1 WO 2014113993A1 CN 2013071032 W CN2013071032 W CN 2013071032W WO 2014113993 A1 WO2014113993 A1 WO 2014113993A1
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WO
WIPO (PCT)
Prior art keywords
light
light guiding
incident
emitting
guiding strip
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PCT/CN2013/071032
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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 US13/819,341 priority Critical patent/US8872973B2/en
Publication of WO2014113993A1 publication Critical patent/WO2014113993A1/zh

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005Light 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 of the fibre type
    • G02B6/0008Light 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 of the fibre type the light being emitted at the end of the fibre
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light 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
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means 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
    • G02B6/0028Light guide, e.g. taper

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.
  • 1 is a schematic structural view of a light introduction system of a conventional side-entry backlight module.
  • the light introduction system 1 absorbs ambient light CL by using an ambient light collection system 10 and generates absorption light SL, and the absorption light SL is introduced into a plurality of optical fibers 20
  • the light exiting end 21 of each of the optical fibers 20 is adjacent to a light incident surface 31 of the light guide plate 30, and the light emitted from the respective light exiting ends 21 can be incident into the light guide plate 30 through the light incident surface 31, and mixed in the light guide plate 30. After being uniformly emitted through the light-emitting surface 33, 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 introduction system comprising: an ambient light collecting system that absorbs ambient light and generates absorbed light toward ambient light; a plurality of light guiding devices Each light guiding device has an light incident end and an light exit end, the light incident end is adjacent to the ambient light collecting system, and the absorbed light enters the light incident end and is guided to the light exiting end; At least two light guiding strips, the light guiding strip includes a light emitting side surface, a light incident side surface connected to the light emitting side surface, and a second side surface opposite to the light incident side surface, the light emitting side surface being adjacent to the light guide plate a light incident surface, the second side of the first light guiding strip is opposite to the second side surface of the second light guiding strip, and the light emitting end of the portion of the light guiding device is adjacent to the light incident side of the first light guiding strip, and the other portion The light exit end of the light guiding
  • 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 The ambient light collecting system, the absorbing light enters the light incident end and is guided to the light emitting end; at least two light guiding strips, the light guiding strip includes a light emitting side surface, and is connected to the light emitting side a light incident side surface and a second side opposite to the light
  • the light guide plate includes a light incident surface, and a bottom surface opposite to the light incident surface. And the 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
  • the light-introducing system further includes: an ambient light collecting system that faces the ambient light, absorbs the ambient light and generates absorbed light; and a plurality of light guiding devices, each of the light guiding devices has an light-input end and a light-emitting end The light incident end is adjacent to the ambient light collecting system, the absorbed light enters the light incident end and is guided to the light emitting end; at least two light guiding strips, the light guiding strip includes a light exiting side, a light incident side surface connected to the light exiting side surface and a second side surface opposite to the light
  • the number of the one portion of the light guiding means is equal to the number of the other part of the light guiding means.
  • the light guiding device is an optical fiber.
  • the light guiding strip further includes a first side surface opposite to the light emitting side surface, and a bottom surface and a top surface connected to the light emitting side surface, wherein the first side surface, the second side surface, the bottom surface and the top surface are It has a reflective layer.
  • the reflective layer is a silver reflective layer, a gold reflective layer or a dielectric reflective layer.
  • a plurality of mesh points are distributed on the first side.
  • the shape of the dots is hemispherical or cylindrical.
  • the material of the light guiding strip is PMMA.
  • the side-entry backlight module and the liquid crystal display of the present invention by using two light guiding strips, the plurality of optical fibers can be divided into two parts, thereby reducing the width and length of the light guiding strip, thereby reducing
  • the small side-entry backlight module is compact and cost-effective.
  • the reduction in the width and length of the light guiding strip also makes it easier for the light away from the first side of the light guiding point to hit the halftone point, and at the same time, the propagation path of the light in the light guiding strip is greatly shortened, and the absorption loss is reduced.
  • the light emitted from the light-emitting end of the optical fiber can be uniformly injected into the light guide plate from the light-emitting side, thereby reducing the phenomenon of uneven brightness and darkness of the light-incident surface of the light guide plate, thereby improving The optical taste of the side-lit backlight module.
  • FIG. 1 is a schematic structural view of a conventional side-entry backlight module.
  • 2 is a schematic structural view of a light introduction system according to an embodiment of the present invention.
  • Figure 3 is a front elevational view of the light incident side of the light guiding strip of the embodiment of the present invention.
  • 4 is a schematic view showing another shape of a halftone dot on a first side surface 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.
  • the light introduction system 1 includes an ambient light collection system 10, a plurality of optical fibers 20, and two light guiding strips 40. Specifically, 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. It is noted that 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 uniformly mixed in the light guide plate 30 and then emitted from the light exit surface 33.
  • the light guiding strip 40 includes a light emitting side surface 42 , a light incident side surface 41 connected to the light emitting side surface 42 , and a first side surface 44 opposite to the light incident side surface 41 , wherein the light emitting side surface 42 faces and is adjacent to the light incident surface 31 ,
  • the first side faces 44 of the light guiding strips 40 are oppositely disposed.
  • the material of the light guiding strip 40 may be PMMA (Polymethylmethacrylate) or the like.
  • the plurality of optical fibers 20 are divided into two parts, wherein the light exit end 21 of a portion of the optical fiber 20 is placed adjacent to the light incident side 41 of the first light guide strip 40, and the light exit end 21 of the other portion of the optical fiber 20 is adjacent to the second guide.
  • the light incident side surface 41 of the light strip 40 is placed, notably, in order to make the amount of light emitted from the light exit side 42 of each light guide strip equal, it is preferable that the number of the partial optical fibers 20 is equal to the number of the other partial optical fibers 20.
  • the number and arrangement of the light-emitting ends 21 at the light-incident side surface 41 are not limited to those shown in FIG.
  • 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, and is then 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 light-guiding strip 40, is mixed in the light-guiding strip 40, and is emitted by the light-emitting side surface 42.
  • the light guiding strip 40 of the embodiment further includes a second side surface 43 opposite to the light emitting side surface 42 and a bottom surface 45 and a top surface 46 which are oppositely disposed and connected to the light emitting side surface 42.
  • the first side surface 44, the second side surface 43, the bottom surface 45 and the top surface 46 are each provided with a reflective layer 50.
  • the reflective layer 50 is used to reflect light incident on the face having the reflective layer 50 back into the light guide strip 40 such that more light is emitted from the light exit side 42.
  • 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.
  • the dot 60 may be provided on the second side 43.
  • the light entering from the light incident side surface 41 is incident on the halftone dots 60, it is scattered by the halftone dots 60, and most of the scattered light is finally reflected by the light exiting side surface 42 after being reflected multiple times in the light guiding strip 40.
  • the light emitted from the light-emitting side surface 42 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 light is emitted so that the light emitted through the light exit surface 33 is more uniform.
  • the second side surface 43 at the first side surface 44 may be The density or size of the dots 60 is increased.
  • the shape of the halftone dot 60 is cylindrical, but is not limited thereto. Referring to Figure 4, the shape of the dot 60 can also be hemispherical. Of course, 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.
  • the side-entry backlight module 2 includes a back sheet 70, a light guide plate 30, an optical film 90, and the light introduction system 1 of the present embodiment.
  • the light guide plate 30 includes a light incident surface 31, a bottom surface 32 and a light exit surface 33 which are oppositely disposed and connected to the light incident surface 31.
  • the back surface 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 and is uniformly mixed, and then the uniformly mixed light is emitted from the light exit surface 33.
  • the display panel 80 is disposed on the side-entry backlight module 2 to form a complete liquid crystal display.
  • the side-lit backlight module 2 provides light to the display panel 80, so that the display panel 80 displays an image.
  • the side-entry backlight module and the liquid crystal display of the present invention by using two light guiding strips, a plurality of optical fibers can be divided into two parts, thereby reducing the width of the light guiding strip. And length, thereby reducing the size and weight of the side-entry backlight module and saving cost.
  • the width of the light guide bar and The reduction in length can also make the light away from the first side provided with the dot easier to hit the dot, and at the same time, the propagation path of the light in the light guiding strip is greatly shortened, and the absorption loss is reduced.
  • the light emitted from the light-emitting end of the optical fiber can be uniformly injected into the light guide plate from the light-emitting side, thereby reducing the phenomenon of uneven brightness and darkness of the light-incident surface of the light guide plate, thereby improving The optical taste of the side-lit backlight module.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种光导入系统(1),侧入式背光模组(2)及液晶显示器(3),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(SL)进入入光端(22)并被导引至出光端(21);至少两个导光条(40),导光条(40)包括一出光侧面(42)、与出光侧面(42)相连的一入光侧面(41)及与入光侧面(41)相对的第二侧面(44),出光侧面(42)邻近于导光板(30)的一入光面(31),第一导光条(40)的第二侧面(44)与第二导光条(40)的第二侧面(44)相对设置,一部分导光装置(20)的出光端(21)邻近于第一导光条(40)的入光侧面(41),另一部分导光装置(20)的出光端(21)邻近于第二导光条(40)的入光侧面(41)。

Description

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。 图 1是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, 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; 至少 两个导光条, 所述导光条包括一出光侧面、 与所述出光侧面相连的一入光侧面 及与所述入光侧面相对的第二侧面, 所述出光侧面邻近于导光板的一入光面, 第一导光条的第二侧面与第二导光条的第二侧面相对设置, 一部分导光装置的 出光端邻近于所述第一导光条的入光侧面, 另一部分导光装置的出光端邻近于 所述第二导光条的入光侧面。 本发明的另一目的还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, 该光导入系统包括: 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; 至少两个导光条, 所述导光 条包括一出光侧面、与所述出光侧面相连的一入光侧面及与所述入光侧面相对 的第二侧面, 所述出光侧面邻近于所述入光面, 第一导光条的第二侧面与第二 导光条的第二侧面相对设置, 一部分导光装置的出光端邻近于所述第一导光条 的入光侧面, 另一部分导光装置的出光端邻近于所述第二导光条的入光侧面。 本发明的另一目的还在于提供一种液晶显示器, 包括背板、 导光板、 光学 膜片及显示面板, 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, 该光导入系统包括: 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弓 I至 所述出光端; 至少两个导光条, 所述导光条包括一出光侧面、 与所述出光侧面 相连的一入光侧面及与所述入光侧面相对的第二侧面, 所述出光侧面邻近于所 述入光面, 第一导光条的第二侧面与第二导光条的第二侧面相对设置, 一部分 导光装置的出光端邻近于所述第一导光条的入光侧面, 另一部分导光装置的出 光端邻近于所述第二导光条的入光侧面。 此外, 所述一部分导光装置的数量与所述另一部分导光装置的数量相等。 此外, 所述导光装置为光纤。 此外, 所述导光条还包括相对于所述出光侧面的第一侧面、 与所述出光侧 面相连并相对的底面和顶面, 所述第一侧面、 第二侧面、 底面及顶面上均设有 反射层。 此外, 所述反射层为银反射层、 金反射层或介质反射层。 此外, 所述第一侧面上分布有多个网点。 此外, 所述网点的形状为半球形或圆柱形。 此外, 所述导光条的材质为 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, 通过采用两个 导光条, 可以将多条光纤分为两部分, 这样可以减小导光条的宽度和长度, 从 而减小侧入式背光模组的体积和重量并节省成本。导光条的宽度和长度的减小 还可使远离设有网点的第一侧面的光更容易打到网点上, 同时, 光在导光条中 的传播路径大幅縮短, 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 导光板的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结构示意图。 图 3是本发明实施例的导光条的入光侧面的正视图。 图 4是本发明实施例的导光条的第一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、 两个导光条 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中混合均匀后由出光面 33射出。 导光条 40包括一出光侧面 42、 与出光侧面 42相连的一入光侧面 41、 与入光侧面 41相对的第一侧面 44, 其 中, 出光侧面 42面向并邻近于入光面 31设置, 两个导光条 40的第一侧面 44 相对设置。 此外, 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分成两部分, 其中一部分光纤 20的出光端 21邻近于第一导光条 40的入光侧面 41放置, 另一部分光纤 20的出光端 21 邻近于第二导光条 40的入光侧面 41放置, 值得注意地是, 为了使得各个导光 条的出光侧面 42射出的光量相等, 优选一部分光纤 20的数量和另一部分光纤 20的数量相等。此外, 出光端 21在入光侧面 41处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 射出的光进入导光条 40后, 在导光条 40中进行混合后由出光侧面 42射出。 本实施例的导光条 40还包括与出光侧面 42相对的第二侧面 43、相对设置 并与出光侧面 42连接的底面 45及顶面 46。 为了使得进入导光条 40中的光最 大化地由出光侧面 42射出, 第一侧面 44、 第二侧面 43、 底面 45及顶面 46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 导光条 40中, 以使更多的光由出光侧面 42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 42射出的光呈现较为均匀的分布, 可在 第二侧面 43上设置网点 60。 当从入光侧面 41进入的光射到网点 60上时会被 网点 60散射, 经散射后的光在导光条 40内经多次反射后绝大部分最终会由出 光侧面 42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 42 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。 另外, 在两个导光条 40的第一侧面 44的相对处, 为了避免因存在 空隙而致使出射光的亮度偏低的问题, 例如可将靠近第一侧面 44处的第二侧 面 43上的网点 60的密度或者尺寸增大。 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及本 实施例的光导入系统 1。 导光板 30包括一入光面 31、 相对设置并与入光面 31 相连的底面 32及出光面 33,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, 通 过采用两个导光条, 可以将多条光纤分为两部分, 这样可以减小导光条的宽度 和长度, 从而减小侧入式背光模组的体积和重量并节省成本。 导光条的宽度和 长度的减小还可使远离设有网点的第一侧面的光更容易打到网点上, 同时, 光 在导光条中的传播路径大幅縮短, 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, 减小导光板的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, 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; 至少两个导光条, 所述导光条包括一出光侧面、 与所述出光侧面相连的一 入光侧面及与所述入光侧面相对的第二侧面, 所述出光侧面邻近于导光板的一 入光面, 第一导光条的第二侧面与第二导光条的第二侧面相对设置, 一部分导 光装置的出光端邻近于所述第一导光条的入光侧面, 另一部分导光装置的出光 端邻近于所述第二导光条的入光侧面。
2、 根据权利要求 1所述的光导入系统, 其中, 所述一部分导光装置的数 量与所述另一部分导光装置的数量相等。
3、 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, 所 述导光条的材质为 PMMA。
4、 根据权利要求 1所述的光导入系统, 其中, 所述导光条还包括相对于 所述出光侧面的第一侧面、 与所述出光侧面相连并相对的底面和顶面, 所述第 一侧面、 第二侧面、 底面及顶面上均设有反射层。
5、 根据权利要求 4所述的光导入系统, 其中, 所述第一侧面上分布有多 个网点, 所述网点的形状为圆柱形。
6、 根据权利要求 4所述的光导入系统, 其中, 所述第一侧面上分布有多 个网点, 所述网点的形状为半球形。
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, 该光导入系统包括: 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; 至少两个导光条, 所述导光条包括一出光侧面、 与所述出光侧面相连的一 入光侧面及与所述入光侧面相对的第二侧面, 所述出光侧面邻近于所述入光 面, 第一导光条的第二侧面与第二导光条的第二侧面相对设置, 一部分导光装 置的出光端邻近于所述第一导光条的入光侧面, 另一部分导光装置的出光端邻 近于所述第二导光条的入光侧面。
8、 根据权利要求 7所述的侧入式背光模组, 其中, 所述一部分导光装置 的数量与所述另一部分导光装置的数量相等。
9、 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, 所述导光条的材质为 PMMA。
10、 根据权利要求 7所述的侧入式背光模组, 其中, 所述导光条还包括相 对于所述出光侧面的第一侧面、 与所述出光侧面相连并相对的底面和顶面, 所 述第一侧面、 第二侧面、 底面及顶面上均设有反射层。
11、 根据权利要求 10所述的侧入式背光模组, 其中, 所述第一侧面上分 布有多个网点, 所述网点的形状为圆柱形。
12、 根据权利要求 10所述的侧入式背光模组, 其中, 所述第一侧面上分 布有多个网点, 所述网点的形状为半球形。
13、 一种液晶显示器, 包括背板、 导光板、 光学膜片及显示面板, 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, 该光导入系统包 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; 至少两个导光条, 所述导光条包括一出光侧面、 与所述出光侧面相连的一 入光侧面及与所述入光侧面相对的第二侧面, 所述出光侧面邻近于所述入光 面, 第一导光条的第二侧面与第二导光条的第二侧面相对设置, 一部分导光装 置的出光端邻近于所述第一导光条的入光侧面, 另一部分导光装置的出光端邻 近于所述第二导光条的入光侧面。
14、 根据权利要求 13所述的液晶显示器, 其中, 所述一部分导光装置的 数量与所述另一部分导光装置的数量相等。
15、 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, 所述导光条的材质为 PMMA。
16、 根据权利要求 13所述的液晶显示器, 其中, 所述导光条还包括相对 于所述出光侧面的第一侧面、 与所述出光侧面相连并相对的底面和顶面, 所述 第一侧面、 第二侧面、 底面及顶面上均设有反射层。
17、 根据权利要求 16所述的液晶显示器, 其中, 所述第一侧面上分布有 多个网点, 所述网点的形状为圆柱形。
18、 根据权利要求 16所述的液晶显示器, 其中, 所述第一侧面上分布有 多个网点, 所述网点的形状为半球形。
PCT/CN2013/071032 2013-01-22 2013-01-28 光导入系统、侧入式背光模组及液晶显示器 WO2014113993A1 (zh)

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