WO2015062259A1 - 导光元件、背光源及显示装置 - Google Patents

导光元件、背光源及显示装置 Download PDF

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Publication number
WO2015062259A1
WO2015062259A1 PCT/CN2014/078278 CN2014078278W WO2015062259A1 WO 2015062259 A1 WO2015062259 A1 WO 2015062259A1 CN 2014078278 W CN2014078278 W CN 2014078278W WO 2015062259 A1 WO2015062259 A1 WO 2015062259A1
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WO
WIPO (PCT)
Prior art keywords
light guide
diffuse reflection
curved surface
light
guide plate
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PCT/CN2014/078278
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English (en)
French (fr)
Inventor
赵洪宇
王丹
邹斌
李响
吕金库
浩育涛
郭俊杰
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Publication of WO2015062259A1 publication Critical patent/WO2015062259A1/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
    • G02B6/0031—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
    • G02B6/0013—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
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer

Definitions

  • Light guiding element, backlight and display device Light guiding element, backlight and display device
  • the present invention relates to the field of display, and in particular, to a light guiding element, a backlight, and a display device.
  • the liquid crystal display mainly consists of a liquid crystal panel and a backlight. Since the liquid crystal panel itself does not emit light, the liquid crystal panel needs to be projected or reflected by an external light source. Most of the existing liquid crystal panels are transmissive devices with backlights, and backlights. The illuminating characteristics will directly affect the picture quality of the liquid crystal panel display device, so the backlight is a very important component of the liquid crystal display.
  • the backlight should be divided into side light type and direct type.
  • the side light type is designed with LED lights on the edge of the liquid crystal display.
  • the direct type is designed to design LED lights on the entire back surface of the liquid crystal display. Under normal circumstances, the liquid crystal is below 30in.
  • the edge-light backlight is mainly used.
  • the size of the direct-type backlight increases with the size. As the size of the LCD TV becomes larger and larger, the backlight of the direct-type backlight The specific gravity also increases.
  • Normal direct-type backlights usually use LEDs with tightly arranged LEDs or secondary lenses as the light source.
  • control if applied to the backlight that needs to be scanned, this part of the light will cause crosstalk, which will affect the picture quality. With the promotion of 3D display technology, the direct crosstalk problem will become the bottleneck of the development of direct-down 3D TV.
  • the technical problem to be solved by the present invention is: How to reduce the crosstalk of the light in the direct type backlight mode.
  • the present invention provides a light guiding element, including:
  • a light source disposed on a side of the light incident surface of the light guide plate
  • the first diffuse reflection surface is disposed opposite to the light-emitting surface of the light guide plate, and is used for diffusely reflecting light emitted by the light guide plate.
  • the light guide plate is disposed opposite to the first diffuse reflection curved surface, and is located at an end position of the first diffuse reflection curved surface, and the light emitting surface of the light guide plate is opposite to the diffuse reflection surface of the first diffuse reflection curved surface. .
  • the light guide plate has the same width as the first diffuse reflection curved surface.
  • the curved surface of the first diffuse reflection surface is concave arc.
  • a diffusion plate is further disposed above the light guiding element, and the first diffuse reflection curved surface extends upward to the diffusion plate, so that the light guide plate, the first diffuse reflection curved surface, and the diffusion plate form a Optical cavity.
  • the curvature of the first diffuse reflection surface may be set by the height of the optical cavity.
  • the method further includes:
  • a second diffuse reflection surface located opposite the light guide plate and opposite to the first diffuse reflection surface to re-reflect the reflected light of the first diffuse reflection surface.
  • a diffusing plate is further disposed above the light guiding element such that the second diffuse reflecting surface is placed between the upper side of the light guiding plate and the diffusing plate.
  • the first diffuse reflection surface and/or the second diffuse reflection surface are made of a highly diffuse reflective material.
  • the highly diffuse reflective material comprises polyethylene terephthalate PET or polycarbonate PC.
  • the method further includes:
  • first support structure coupled to the first diffuse reflective surface, the first support structure including a face matching the first diffuse reflective surface to provide support for the first diffuse reflective surface.
  • the method further includes: a second support structure connected to the second diffuse reflection surface, the second support structure including a surface matching the second diffuse reflection surface, so as to be opposite to the second diffuse
  • the reflective surface provides support.
  • the first support structure and/or the second support structure is a plastic housing.
  • a bottom of the second support structure is provided with a card slot, and the light guide plate is fixed in the card slot.
  • a reflective sheet is disposed between the light guide plate and the second supporting structure, and a PCB board is further disposed between the reflective sheet and the second supporting structure, and the LED board is connected to the PCB board.
  • the present invention also provides a backlight comprising a plurality of the above-described light guiding elements.
  • the plurality of light guiding elements are connected together by bonding or structural splicing.
  • a reflective surface is further disposed at the edge of the backlight.
  • the present invention provides a display device including the above-described backlight.
  • the invention adopts a light guide plate as a conductive medium of the light source, and the light diffused from the surface of the light guide plate is dispersed by the first diffuse reflection curved surface, and the first diffuse reflection curved surface extends to the diffusion plate of the upper layer, and is formed by the light guide plate and the first diffuse reflection surface. And an optical cavity formed by the diffusing plate, so that the light emitted by the light guide plate can only propagate in the optical cavity, reducing the crosstalk of the light in the direct backlight mode.
  • FIG. 1 is a structural diagram of a light guiding element according to an embodiment of the present invention.
  • FIG. 2 is a structural diagram of another light guiding element according to an embodiment of the present invention.
  • Figure 3 is a partial enlarged view of a-a' in Figure 2;
  • Figure 4 is a partial enlarged view of b-b in Figure 3;
  • FIG. 5 is a structural diagram of a backlight according to an embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of a display device according to an embodiment of the present invention.
  • the light guiding element includes a light guide plate 1, a light source (not shown) and a first diffuse reflection curved surface 2;
  • the light guide plate in this embodiment is different from the light guide plate commonly used in the prior art.
  • the light guide plate in this embodiment may be a narrow light guide plate; the width of the light exit surface of the light guide plate and the first diffuse reflection Surface 2 has the same width.
  • the size of the light guide plate 1 can be set according to the size of the first diffuse reflection curved surface 2.
  • a diffusion plate is disposed above the light guiding element, and the first diffuse reflection curved surface 2 extends upward to the diffusion plate, so that the light guide plate 1, the first diffuse reflection curved surface 2 and the diffusion plate form an optical cavity.
  • the light emitted by the light guide plate can only propagate in the optical cavity, which can greatly reduce crosstalk to adjacent areas.
  • the light source may be disposed on one side of the light incident surface of the light guide plate.
  • an LED light may be used.
  • the first diffuse reflection curved surface 2 is disposed opposite to the light-emitting surface of the light guide plate 1 and is used for diffusely reflecting light emitted from the light guide plate.
  • the curved surface of the surface of the first diffuse reflection surface 2 is concave arc, that is, the light reflected by the first diffuse reflection surface 2 is reflected toward the diffusion plate located above the first diffuse reflection surface 2 to enhance the light. Transmittance.
  • the light guide plate 1 is disposed opposite to the first diffuse reflection curved surface 2, and the light guide plate 1 is located on the first diffuse reflection curved surface. The end position of 2.
  • the first diffuse reflection surface 2 is a curved surface formed by a highly diffuse reflective material, and the light emitted from the light-emitting surface of the light guide plate 1 can be dispersed.
  • the high-diffuse reflective material can be PET (Polyethylene terephihalate, poly(terephthalic acid). Ethylene glycol), PC (Polycarbonate, polycarbonate) and other materials.
  • the curvature of the first diffuse reflection surface 2 can be set by the height of the optical cavity, and the height of the optical cavity also affects the size of the optical cavity.
  • the curvature value of the first diffuse reflection surface 2 can be obtained by optical simulation software combined with the reflection light shape simulation of the selected reflective material, and the optical software that can be utilized can be optisworks, lightools, and the like.
  • FIG. 2 is a structural diagram of another light guide element according to an embodiment of the present invention, wherein the light guide element further includes a second diffuse reflection.
  • the curved surface 3 is located above the light guide plate 1 and opposite to the first diffuse reflection curved surface 2 to re-reflect the reflected light of the first diffuse reflection curved surface 2.
  • the second diffuse reflection curved surface 3 can be a curved surface composed of a highly diffuse reflective material, and can reflect the reflected light of the first diffuse reflection curved surface 2 to enhance the light guiding effect of the light guiding element.
  • the second diffuse reflection curved surface 2 is disposed between the upper side of the light guide plate 1 and the diffusion plate to form an optical cavity composed of the first diffuse reflection curved surface, the light guide plate, the second diffuse reflection curved surface, and the diffusion plate, which can prevent the phase Cross-talk of light in an adjacent optical cavity.
  • a support structure may be further provided for the first diffuse reflection surface, and the light guiding element further includes a first support structure 5 connected to the first diffuse reflection surface 2,
  • the first support structure 5 includes a surface matching the first diffuse reflection curved surface 2 to provide the first diffuse reflection E3 ⁇ 4 surface 2 For support.
  • the first support structure may be used to reduce the weight of the light guiding component and save cost.
  • the light guiding component further includes:
  • the second support structure 4 is a plastic housing.
  • a card slot is provided at the bottom of the second support structure 4, and the light guide plate 1 is fixed in the card slot by means of snapping or pasting.
  • a reflection sheet 14 is disposed between the light guide plate 1 and the second support structure 4, and the reflection sheet 14 is configured to reflect the light introduced by the light guide plate 1 so that the light can be uniformly reflected onto the first diffuse reflection surface 2.
  • a PCB board 16 is further disposed between the reflective sheet 14 and the second supporting structure 4, and the LED board 15 is connected to the PCB board 16.
  • the LED lamp 15 is connected to the PCB board 16, and the light emitting surface of the LED 13 corresponds to the light incident surface of the light guide plate 1.
  • an embodiment of the present invention provides a backlight comprising the light guiding element of any of the above.
  • the plurality of light guiding elements are connected, and the plurality of light guiding elements are connected together by bonding or structural splicing.
  • the number of the light guiding elements may be set according to the size of the display device to which the backlight belongs and the light guiding capability of the light guide plate.
  • FIG. 5 is a structural diagram of a backlight according to an embodiment of the present invention, which is composed of a plurality of the light guiding elements 12, and a reflective surface 13 is further disposed at an edge of the backlight to prevent backlight light. Loss and light leakage.
  • the diffusion module, the optical film and the liquid crystal panel are placed above the light guiding element, and the mechanical structure is fixed to complete the assembly of the display module. Since the light emitted by the light source of the light guide plate can only propagate in the optical cavity to which the light guide plate belongs, crosstalk to adjacent areas can be greatly reduced. Wherein, according to the designed target module thickness and the light guiding capability of the light guide plate, the length and width of the optical cavity composed of the light guiding element and the curvature of the internal diffuse reflection surface can be adjusted.
  • Embodiments of the present invention also provide a display device including any of the above backlights.
  • the display device may be: a liquid crystal panel, an electronic paper, a mobile phone, a tablet computer, a television, a display, Any product or component that has a display function, such as a laptop, digital photo frame, and navigator.
  • FIG. 6 is a cross-sectional view of a display device according to an embodiment of the present invention, including a light guide plate 1, a first diffuse reflection curved surface 2, a second diffuse reflection curved surface 3, a second support structure 4, and a first support structure 5.
  • the light guiding element has a diffusing plate 6, an optical film 7, a liquid crystal panel 8, and the like placed above the light guiding element. Further, a metal frame 9, a plastic frame, and a back plate 11 are further disposed at an edge of the display device.
  • the display device uses a light guide plate as a conductive medium of a light source, and the first diffuse reflection curved surface made of a highly diffuse reflective material breaks the light emitted from the surface of the light guide plate to make the picture uniform, and the first The diffuse reflection surface extends to the diffusion plate of the upper layer, so that the light emitted by the light guide plate can only propagate in the optical cavity of the light guide plate, reducing the crosstalk of the light in the direct backlight mode, and the invention greatly reduces the use of the LED ⁇ / RTI> ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; ⁇ / RTI> ⁇ RTIgt; A number of improvements and refinements have been made which are also considered to be within the scope of the invention.

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

Abstract

一种导光元件，包括：导光板（1）；光源（15），设置于所述导光板（1）的入光面一边；第一漫反射曲面（2），设置于所述导光板（1）出光面的对面，其用于将导光板（1）射出的光线进行漫反射。该导光元件采用导光板（1）作为光源（15）的传导介质，由第一漫反射曲面（2）将由导光板（1）表面出射的光线打散，该第一漫反射曲面（2）延伸至上层的扩散板（6），构成由导光板（1）、第一漫反射曲面（2）以及扩散板（6）组成的光学腔体，使该导光板（1）发出的光只能在该光学腔体内传播，减少直下式背光源模式下的光线串扰。

Description

导光元件、 背光源及显示装置
本发明涉及显示领域， 尤其涉及一种导光元件、 背光源及显示装置。
液晶显示器主要由液晶面板和背光源组成， 因为液晶面板本身不发光， 所以液晶面板需要通过外部光源实现投射或者反射显示， 现有的液晶面板大 多数是带有背光源的透射型器件， 背光源的发光特性将直接影响到液晶面板 显示器件的画面品质， 因此背光源是液晶显示器非常重要的组成部件。
现阶段， 背光源 要分为侧光式和直下式， 侧光式是在液晶显示器边缘 设计 LED灯， 直下式是在液晶显示器的整个背面全部设计 LED灯， 一般情 况下， 在 30in以下的液晶电视中主要采用侧光式背光源，在 30in以上的液晶 电视中随尺寸增大直下式背光源应 比例随之增加， 随着目前液晶电视的尺 寸变得越来越大， 直下式背光源的比重也随之增加， 普通直下式背光源通常 采用多颗 LED紧密排列或带有二次透镜的 LED作为光源， 但是， 对于直下 式背光源模式， 光线在直下式的混光腔内传播不受控制， 如果应用在需要扫 描的背光上， 则此部分光线将会产生串扰， 影响画面品质。 随着 3D 显示技 术的推广， 直下式串扰问题必将成为直下式 3D电视的发展瓶颈。
(一） 要解决的技术问题
本发明要解决的技术问题是： 如何减少直下式背光源模式下的光线串扰。
(二） 技术方案
为解决上述技术问题， 本发明提供了一种导光元件， 包括：
导光板；
光源， 设置于所述导光板的入光面一边；
第-一漫反射曲面， 设置于所述导光板出光面的对面， 其用于将导光板射 的光线进行漫反射。 可选地， 所述导光板与第一漫反射曲面相对设置， 且位于所述第一漫反 射曲面的端部位置， 所述导光板的出光面与所第一漫反射曲面的漫反射面相 对。
可选地， 所述导光板与所述第一漫反射曲面的宽度相同。
可选地， 所述第一漫反射曲面的曲面狐度为内凹弧度。
可选地， 在所述导光元件上方还放置有扩散板， 所述第一漫反射曲面向 上延伸至所述扩散板， 使得所述导光板、 第一漫反射曲面和所述扩散板构成 一个光学腔体。 可以通过所述光学腔体的高度设定所述第一漫反射曲面的曲 可选地， 还包括：
第二漫反射曲面， 其位于所述导光板的上方以及所述第一漫反射曲面的 对面， 以便将所述第一漫反射曲面的反射光进行再反射。
可选地， 在所述导光元件上方还放置有扩散板， 使得所述第二漫反射曲 面被放置在所述导光板的上侧与所述扩散板之间。 并且所述第一漫反射曲面 和 /或第二漫反射曲面由高漫反射材料制成。
可选地，所述高漫反射材料包括聚对苯二甲酸乙二酯 PET或聚碳酸酯 PC。 可选地， 还包括：
第一支撑结构， 与所述第一漫反射曲面相连接， 所述第一支撑结构包括 与所述第一漫反射曲面相匹配的面， 以便对所述第一漫反射曲面提供支撑。
可选地， 还包括； 第二支撑结构， 与所述第二漫反射曲面相连接， 所述 第二支撑结构包括与所述第二漫反射曲面相匹配的面， 以便对所述第二漫反 射曲面提供支撑。
可选地， 所述第一支撑结构和 /或第二支撑结构为塑料壳体。
可选地，所述第二支撑结构的底部设有卡槽，所述导光板固定于卡槽中。 可选地， 所述导光板和第二支撑结构之间设有反射片， 所述反射片与第 二支撑结构之间还设有 PCB板， 所述 PCB板上连接 LED灯。
另一方面， 本发明还提供一种背光源， 包括多个上述的导光元件。
可选地，所述多个导光元件通过粘合方式或者结构拼接方式连接在一起。 可选地， 所述背光源边缘处还设置有反射面。 再一方面， 本发明提供一种显示装置， 包括上述的背光源。
(三） 有益效果
本发明采用导光板作为光源的传导介质， 由第一漫反射曲面将由导光板 表面出射的光线打散， 该第一漫反射曲面延伸至上层的扩散板， 构成由导光 板、 第一漫反射曲面以及扩散板组成的光学腔体， 使该导光板发出的光只能 在该光学腔体内传播， 减少直下式背光源模式下的光线串扰。
图 1是本发明实施方式提供的一种导光元件的结构图；
图 2是本发明实施方式提供的另一种导光元件的结构图;
图 3为图 2中 a-a' 局部放大图；
图 4为图 3中 b- b， 局部放大图；
图 5为本发明实施方式提供的一种背光源结构图；
图 6为本发明实施方式提供的显示装置剖面图。
下面结合 图和实施例， 对本发明的具体实施方式作进一步详细描述。 以下实施例用于说明本发明， 但不用来限制本发明的范围。
图 1 是本发明实施方式提供的一种导光元件的结构图， 该导光元件包括 导光板 1、 光源 （图中未示出） 和第一漫反射曲面 2;
其中， 本实施例中的导光板与现有技术中常见的导光板存在一定区别， 本实施例中的导光板可以为窄型的导光板； 其导光板的出光面的宽度与第一 漫反射曲面 2的宽度相同。
其中，该导光板 1的大小可以根据该第一漫反射曲面 2的大小进行设置。 在实际应用中， 该导光元件上方放置扩散板， 所述第一漫反射曲面 2向上延 伸至所述扩散板， 使得该导光板 1、 第一漫反射曲面 2和该扩散板构成一个 光学腔体， 该导光板发出的光只能在该光学腔体内传播， 可极大的减少对相 邻区域的串扰。
光源可以设置于所述导光板的入光面的一边， 例如， 可以选用 LED灯作 该第一漫反射曲面 2, 设置于所述导光板 1 出光面的对面， 其用于将导 光板射出的光线进行漫反射。
其中， 该第一漫反射曲面 2的曲面弧面为内凹弧度， 即确保该第一漫反 射曲面 2反射的光线均朝向位于第一漫反射曲面 2上方的扩散板进行反射， 进行提高光的透过率。
为了使导光板射出的光线可以最大程度地被第一漫反射曲面进行漫反射, 将该导光板 1与第一漫反射曲面 2相对设置， 且所述导光板 1位于所述第一 漫反射曲面 2的端部位置。
其中， 该第一漫反射曲面 2为高漫反射 料构成的曲面， 能够将导光板 1 出光面发出的光线打散， 其中， 该高漫反射材料可以为 PET (Polyethylene terephihalate,聚对苯二甲酸乙二酯）、 PC (Polycarbonate,聚碳酸酯）等材料。
其中， 可以通过光学腔的高度进行设定第一漫反射曲面 2的曲率， 同时 该光学腔的高度也会影响光学腔体的大小。 第一漫反射曲面 2的曲率取值可 以通过光学模拟软件结合所选反射材料的反射光形模拟优化获得， 可以利用 的光学软件可以为 optisworks， lightools等。
此外， 该导光板 i可以为出光面较小的导光板， 参见图 2， 图 2是本发 明实施方式提供的另一种导光元件的结构图， 其中， 导光元件还包括第二漫 反射曲面 3， 位于所述导光板 1 的上方以及所述第一漫反射曲面 2的对面， 以便将所述第一漫反射曲面 2的反射光进行再反射。 该第二漫反射曲面 3可 以为高漫反射材料构成的曲面， 能够将所述第一漫反射曲面 2的反射光进行 再反射， 丛而进一歩地增强该导光元件的导光效果。 将该第二漫反射曲面 2 设置在导光板 1 的上侧与扩散板之间， 形成由第一漫反射曲面、 导光板、 第 二漫反射曲面和扩散板组成的光学腔体， 能够防止相邻光学腔体内的光线串 扰。
为了加强第一漫反射曲面的稳定性， 还可以为第一漫反射曲面设置支撑 结构， 该导光元件还包括- 第一支撑结构 5， 与所述第一漫反射曲面 2相连接， 所述第一支撑结构 5 包括与所述第一漫反射曲面 2相匹配的面， 以便对所述第一漫反射 E¾面 2提 供支撑。
其中， 为减轻该导光元件的重量以及节省成本， 可以将该第一支撑结构
5做成塑料壳体。
可选地， 该导光元件还包括：
第二支撑结构 4， 与所述第二漫反射曲面 3相连接， 所述第二支撑结构 4 包括与所述第二漫反射曲面 3相匹配的面， 以便对所述第二漫反射曲面 3提 供支撑。 其中， 所述第二支撑结构为塑料壳体。
如图 3和 4所示， 为了有效固定住导光板 1， 在第二支撑结构 4的底部 设有卡槽，所述导光板 1通过卡合或粘贴方式等方式固定在该卡槽中。另外， 该导光板 1和第二支撑结构 4之间设有反射片 14， 该反射片 14 ^于反射该 导光板 1导入的光线， 使得光线可以均匀地反射到第一漫反射曲面 2上。
所述反射片 14与第二支撑结构 4之间还设有 PCB板 16， 所述 PCB板 16上连接 LED灯 15。 LED灯 15与 PCB板 16相连， LED 13发光面与导光 板 1的入光面对应。
此外， 本发明实施方式还提供了一种背光源， 包括上述任意一种的导光 元件。
其中， 所述导光元件为多个， 所述多个导光元件通过粘合方式或者结构 拼接方式连接在一起。 其中， 导光元件的数目可以根据背光源所属的显示装 置的尺寸及导光板的导光能力进行设置。
此外， 参见图 5， 图 5为本发明实施方式提供的一种背光源结构图， 由 多个上述导光元件 12组成， 在所述背光源边缘处还设置反射面 13， 能够防 止背光源光线损耗及漏光。
在导光元件上方放置扩散板，光学膜片及液晶面板，并用机械结构固定， 即可完成显示模组的组装。 因为导光板光源发出的光线， 只能在该导光板所 属的光学腔体内传播， 所以可以极大减少对相邻区域的串扰。 其中， 根据设 计的目标模组厚度及导光板的导光能力， 可调节由该导光元件组成的光学腔 的长宽高及内部漫反射曲面的曲率。
本发明实施方式还提供了一种显示装置， 包括上述任意一种背光源。 所 述显示装置可以为： 液晶面板、 电子纸、手机、平板电脑、 电视机、 显示器、 笔记本电脑、 数码相框、 导航仪等任何具有显示功能的产品或部件。
参见图 6， 图 6为本发明实施方式提供的显示装置剖面图， 包括由导光 板 1、 第一漫反射曲面 2、 第二漫反射曲面 3、 第二支撑结构 4、 第一支撑结 构 5组成的导光元件， 在导光元件上方放置扩散板 6、 光学膜材 7、 液晶面板 8等， 此外， 在显示装置的边缘处还设置有金属边框 9、 胶框】 0和背板 11。
本发明实施方式提供的显示装置釆用导光板作为光源的传导介质， 由高 漫反射材料做成的第一漫反射曲面将由导光板表面出射的光线打散， 使画面 均匀化， ϋ该第一漫反射曲面延伸至上层的扩散板， 从而使导光板发出的光 只能在该导光板所述的光学腔体内传播， 减少直下式背光源模式下的光线串 扰， 且本发明大大减少了 LED使用， 不但降低成本， 而且筒化了电路线路结 以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的普 通技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润 饰， 这些改进和润饰也应视本发明的保护范围。

Claims

一种导光元件， 其特征在于， 包括：
导光板；
光源， 设置于所述导光板的入光面一边；
第一漫反射曲面， 设置于所述导光板出光面的对面， 其用于将导光板射 出的光线进行漫反射。
2、 根据权利要求 1所述的导光元件， 其特征在于， 所述导光板与第一漫 反射曲面相对设置， 且所述导光板位于所述第一漫反射曲面的端部位置； 所述导光板的出光面与所第一漫反射曲面的漫反射面相对。
3、 根据权利要求 1所述的导光元件， 其特征在于， 所述导光板与所述第 一漫反射曲面的宽度相同。
4、 根据权利要求 1所述的导光元件， 其特征在于， 所述第一漫反射曲面 的曲面弧度为内凹弧度。
5、 根据权利要求 1所述的导光元件， 其特征在于， 在所述导光元件上方 还放置有扩散板，所述第一漫反射曲面延伸至所述扩散板，使得所述导光板、 第一漫反射曲面和所述扩散板构成一个光学腔体。
6、 根据权利要求 5所述的导光元件， 其特征在于， 通过所述光学腔体的 高度设定所述第一漫反射曲面的曲率。
7、 根据权利要求 1 -4所述的导光元件， 其特征在于， 还包括： 第二漫反射曲面， 其位于所述导光板的上方以及所述第一漫反射曲面的 对面， 以便将所述第一漫反射曲面的反射光进行再反射。
8、 根据权利要求 7所述的导光元件， 其特征在于， 在所述导光元件上方 还放置有扩散板， 并且所述第二漫反射曲面被放置在所述导光板的上侧与所 述扩散板之间。
9、 根据权利要求 1-8所述的导光元件， 其特征在于， 所述第一漫反射曲 面和 /或第二漫反射曲面由高漫反射材料制成。
10、 根据权利要求 9所述的导光元件， 其特征在于， 所述髙漫反射材料 包括聚对苯二甲酸乙二酯 PET或聚碳酸酯 PC。
I 根据权利要求 14所述的导光元件， 其特征在于， 还包括： 第一支撑结构， 与所述第一漫反射曲面相连接， 所述第一支撑结构包括 与所述第一漫反射曲面相匹配的面， 以便对所述第一漫反射曲面提供支撑。
12、 根据权利要求 7或 8所述的导光元件， 其特征在于， 还包括： 第二支撑结构， 与所述第二漫反射曲面相连接， 所述第二支撑结构包括 与所述第二漫反射曲面相匹配的面， 以便对所述第二漫反射曲面提供支撑。
1 3、 根据权利要 11或 12所述的导光元件， 其特征在于， 所述第一支撑 结构和 /或第二支撑结构为塑料壳体。
14、 如权利要求 12所述的导光元件， 其特征在于， 所述第二支撑结构的 底部设有卡槽， 所述导光板固定于卡槽中。
1 5、 如权利要求 14所述的导光元件， 其特征在于， 所述导光板和第二支 撑结构之间设有反射片， 所述反射片与第二支撑结构之间还设有 PCB板， 所 述 PCB板上连接 LED灯。
16 , 一种背光源， 其特征在于， 包括多个如权利要求 1 -15任意一项所述 的导光元件。
17 , 根据权利要求 16所述的背光源， 其特征在于， 所述多个导光元件通 过粘合方式或者结构拼接方式连接在一起。
18 , 根据权利要求 1 6或 17所述的背光源， 其特征在于， 所述背光源边 缘处还设置有反射面。
19 , 一种显示装置， 其特征在于， 包括如权利要求 16 18任意一项所述 的背光源。
PCT/CN2014/078278 2013-10-31 2014-05-23 导光元件、背光源及显示装置 WO2015062259A1 (zh)

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