WO2013182003A1 - 导光装置、发光设备、电子设备和按键 - Google Patents

导光装置、发光设备、电子设备和按键 Download PDF

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Publication number
WO2013182003A1
WO2013182003A1 PCT/CN2013/076403 CN2013076403W WO2013182003A1 WO 2013182003 A1 WO2013182003 A1 WO 2013182003A1 CN 2013076403 W CN2013076403 W CN 2013076403W WO 2013182003 A1 WO2013182003 A1 WO 2013182003A1
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WO
WIPO (PCT)
Prior art keywords
light
light guide
prism structure
light guiding
guide body
Prior art date
Application number
PCT/CN2013/076403
Other languages
English (en)
French (fr)
Inventor
程良军
夏红华
Original Assignee
华为终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为终端有限公司 filed Critical 华为终端有限公司
Priority to EP13800100.3A priority Critical patent/EP2851717A4/en
Priority to JP2015515377A priority patent/JP2015527687A/ja
Publication of WO2013182003A1 publication Critical patent/WO2013182003A1/zh
Priority to US14/560,169 priority patent/US20150085526A1/en

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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
    • G02B6/0033—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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • 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
    • G02B6/0045—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 by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped 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
    • G02B6/0028—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
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources

Definitions

  • Embodiments of the present invention relate to light guiding technologies, and in particular, to a light guiding device, a light emitting device, an electronic device, and a button. Background technique
  • Fig. 1A is a schematic view of a conventional light guiding structure for generating a ring light
  • Fig. 1B is a cross-sectional view taken along line A-A of Fig. 1A. As shown in FIG. 1A and FIG.
  • the button 10 in order to generate a ring light at the edge of the button 10, four LED lamps 20 are disposed around the button 10, and a light guiding column 30 is disposed between each LED lamp 20 and the edge of the button 10.
  • the four light guiding columns 30 enclose an annular structure at the edge of the button 10.
  • the four light guiding columns 30 are light guiding structures, and can guide the light emitted by the LED lamp 20 to the edge of the button 10 to generate a ring light to highlight the button 10. The location, and with the light emitted to view the button function information such as text on the button.
  • the prior art also provides a ring light guiding structure, which is disposed at the edge of the button, and can provide the ring light by using the LED lamp disposed under the ring light guiding structure, and at the same time, to improve the uniformity of the ring light illumination, the ring shape
  • the light guiding structure is further doped with astigmatism powder, and four or more LED lamps are uniformly disposed at the lower end of the annular light guiding structure.
  • the uniformity of the high-circle light is usually set by 4 or more LED lights, which not only increases the volume of the illuminating device, but also increases the energy consumption of the illuminating device. Summary of the invention
  • the embodiment of the invention provides a light guiding device, a light emitting device, an electronic device and a button, which can effectively improve the light guiding uniformity of the light guiding structure, reduce the number of light sources used, and reduce energy consumption.
  • the embodiment of the invention provides a light guiding device, comprising:
  • a light guide body wherein the light guide body is provided with a prism structure for reflecting light entering the light guide body;
  • the light guide body has a light incident surface and an light exit surface, and the light incident surface is an irregular surface matched with the prism structure for reflecting light reflected from the prism structure to the light exit surface.
  • the embodiment of the present invention further provides a light-emitting device, including a light-guiding device and a light source, wherein the light-guiding device is a light-guiding device provided by the embodiment of the present invention;
  • the light source is disposed at a position opposite to a prism structure in the light guiding device.
  • an embodiment of the present invention further provides an electronic device, including the foregoing illuminating device provided by the embodiment of the present invention.
  • the embodiment of the present invention further provides a button, comprising the light guiding device provided by the embodiment of the present invention, wherein a light guiding surface of the light guiding body of the light guiding device is provided with a button portion.
  • the light entering the light guide body is reflected, so that the light source can be reduced in the light guide body.
  • the purpose of the hook light can be achieved, and it is particularly suitable as a light-emitting device such as a ring light, which can effectively simplify the light guiding structure, reduce the volume of the light-emitting device, reduce the number of light sources used, and reduce the energy consumption of the light-emitting device. Better light guiding effect.
  • FIG. 1A is a schematic view of a conventional light guiding structure for generating a ring light
  • Figure 1B is a cross-sectional view taken along line A-A of Figure 1A;
  • FIG. 2A is a perspective view showing a perspective view of a light guiding device according to a first embodiment of the present invention
  • FIG. 2B is a perspective view showing another embodiment of the light guiding device according to the first embodiment of the present invention
  • FIG. 1 is a schematic structural view of a light guiding device provided in combination with a light source
  • FIG. 3 is a schematic diagram showing the principle of operation of a light guiding device according to an embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional structural view of a light guiding device applied to an electronic device according to an embodiment of the present invention. detailed description
  • the embodiment of the invention provides a light guiding device, wherein a prism structure can be arranged inside the light guiding device, the light entering the light guiding body is reflected by the prism structure, and the prism structure can be reflected after the surface shape of the light guiding body is improved. The light is further reflected to the light-emitting surface of the light guide.
  • the light guiding device may include a light guide body, and the light guide body is provided with a prism structure, and the prism structure is configured to reflect light entering the light guide body.
  • the light guide has a light incident surface and a light exit surface, and the light incident surface is an irregular surface matched with the prism structure for reflecting light reflected from the prism structure to the light exit surface of the light guide body.
  • the light guiding device provided in this embodiment can face a part of the light that is incident on the light guiding body from the light incident surface on the side of the light incident surface, and faces the light by using the prism structure and the irregular light incident with the prism structure. Light is emitted from the light-emitting surface of the light guide.
  • FIG. 2A is a perspective view showing a perspective view of a light guiding device according to a first embodiment of the present invention
  • FIG. 2B is a perspective view showing another embodiment of the light guiding device according to the first embodiment of the present invention
  • a schematic diagram of a structure when a light guiding device is provided in combination with a light source A schematic diagram of the principle of operation of the light guiding device in the embodiment of the invention.
  • the light guiding device of the present embodiment includes a light guiding body 1 , and the light guiding body 1 is a circular light guiding body structure.
  • the light guiding body 1 of the embodiment has a rectangular annular structure;
  • the light guide body 1 is provided with a prism structure on the opposite side light guiding portions A1 and the light guiding portion A2, and the prism structure is a triangular opening 2 formed on the light guiding body 1;
  • the light incident surface of the light guiding body 1 11 that is, the surface on the side opposite to the light source 3 disposed at the lower end of the light guide body 1 is a V-shaped surface matching the triangular opening 2, and in this embodiment, the light incident surfaces of the light guiding portion A1 and the light guiding portion A2 are both The V-shaped surface is matched with the triangular opening 2, and the light reflected by the triangular opening 2 is re-reflected, and then emitted from the light-emitting surface 12 of the corresponding light guiding body 1.
  • the light source 3 when the light guiding device is used, as shown in FIG. 2C and FIG. 3, the light source 3 is located directly opposite to the triangular opening 2, and a apex angle of the triangular opening 2 is opposite to the light source 3, so that The light emitted by the light source 3 is incident into the light guide body 1 at a certain incident angle, and total reflection is generated on the surface of the triangular opening 2, and the totally reflected light is again directed toward the light incident surface 11 and directed toward The light incident on the light incident surface 11 is totally reflected to the light exit surface 12 of the light guide body 1.
  • the light source 3 enters the light guide body 1 and the light ray L1 shown in FIG.
  • the light emitted by the light source 3 will be reflected inside the light guide body 1 through the triangular opening 2, thereby achieving one-time diffusion treatment of the light; in addition, the light reflected by the triangular opening 2 is At the V-shaped entrance surface 11, the light diffused inside the light guide 1 can be totally reflected again, and finally the light is emitted from the light-emitting surface 12 of the light guide 1. It can be seen that since the light passes through the prism structure inside the light guide 1, that is, the reflection of the triangular opening 2, the light is diffused inside the light guide 1, and thus, is emitted from the light exit surface 12 of the light guide 1. The light emitted is also more uniform.
  • the light guide body 1 is integrated on the button, which can be used as a part of the button. As shown in FIG. 2A to FIG. 2C, the upper surface of the light guide body 1 is provided with a button portion 13, and the button portion 13 and the guide portion are provided.
  • the light body 1 is integrally formed, and a light-shielding region may be provided in a region of the button portion 13 other than the position corresponding to the light-emitting surface of the light guide body 1, thereby forming an annular light-transmitting region, so that the light-emitting surface of the light guide body is formed.
  • the emitted light can be The annular light-transmitting area is emitted to form an annular light to meet the light-emitting needs of the button.
  • FIG. 4 is a schematic cross-sectional structural view of a light guiding device applied to an electronic device according to an embodiment of the present invention.
  • the light guiding device of the embodiment is integrated on the button 4 and applied to the electronic device 5, wherein the light source 3 is located at a lower end position of the light guiding device opposite to the triangular opening 2 for providing light.
  • the light source 3 is an LED lamp
  • the button 4 is provided with a supporting portion that is mounted and fitted with the electronic device 5, so that when the electronic device 5 is in operation, the light source 3 can be controlled, and after the light emitted by the light source 3 enters the light guiding body 1, the light source 3 is controlled.
  • a secondary total reflection can be produced by the triangular opening 2 and the light incident surface (not shown) in the inside, and finally the annular light is emitted from the annular light-emitting area at the upper portion of the button 4.
  • total reflection can be generated, so that all or most of the light can be emitted from the light guiding body 1.
  • the refractive index of the light guide 1 should be greater than the refractive index of the air; in addition, the incident angle of the light entering the light guide 1 toward the surface of the triangular opening 2 should be larger than the critical angle of the light guide (ie, the light) The minimum angle of total reflection can be generated inside the light guide body.
  • the light reflected by the surface of the triangular opening 2, the incident angle of the light incident surface 12 of the light guide body 1 should also be larger than the critical value of the light guide body. angle.
  • the light guide body 1 can be prepared from a material having a refractive index greater than that of air; the distance between the light source 3 and the triangular opening 2, and the angle of the triangle in the structure of the triangular opening 2 should be reasonably set to The majority of the light emitted by the light source 3 can be incident on the surface of the triangular opening 2 in the light guide body 1 at an incident angle larger than the critical angle of the light guide body, so that most of the light can be totally reflected on the surface of the triangular opening 2;
  • the structure of the opening 2 and the V-shaped entrance surface 12 are matched, that is, the V-shaped angle of the light-incident surface 12 is reasonably set so that the light of the structure of the triangular opening 2 is reflected to the light-incident surface 12.
  • the light guide can be prepared by using a secondary force PMMA or a polycarbonate PC, wherein the refractive index of PMMA is 1.48-1.5, the refractive index of PC is 1.59, and the refractive index of air is 1.0, and PMMA is produced.
  • the incident angle of reflection, that is, the critical angle is 42 degrees; the incident angle at which PC produces total reflection, that is, the critical angle is 39 degrees.
  • the size of the triangular opening, the size of the V-shaped incident surface, and the distance between the light source and the light guide can be reasonably arranged according to the materials of different refractive indexes used for the purpose, and those skilled in the art can use different refraction for the same.
  • the light guide body of the material, wherein the triangular opening size, the size of the V-shaped entrance surface, and the distance between the light source and the light guide body can be set according to actual conditions, and are not repeated here.
  • the light source matched with the light guiding device is a point light source, which may specifically be an LED lamp; in addition, the prism in the light guiding device can not only diffuse the light emitted by the light source, but also realize the light.
  • the prism structure can also effectively attenuate the intensity of the light corresponding to the position of the light source, so that the light emitted from the light exit surface is more uniform and soft.
  • Those skilled in the art can understand that by properly arranging the distance between the light source and the triangular opening, and the angle of the V-shaped light surface, the degree of diffusion of the light inside the light guiding body can be reasonably adjusted, thereby adjusting the light guiding body.
  • the angle of the light emitted by the light source into the light guide body is different, only part of the light will actually diffuse inside the light guide body due to the prism structure, and the diffusion Different angles, after the light beam emitted by one light source passes through the prism structure and the two reflections of the light incident surface, the light output effect of a large area or length can be basically formed. Therefore, for the light guide body of the ring structure, only two light sets are provided.
  • the light source can form a circular light effect with a light hook.
  • the prism structure disposed in the light guide body 1 can be as shown in the figure.
  • the triangular opening structure in addition to the triangular opening structure, may also be in the shape of other structures, as long as the light incident from the light source can be totally reflected, and accordingly, depending on the prism structure, the light guiding body
  • the shape of the light-incident surface should also be adjusted to ensure that the light in the light guide body can be uniformly ejected from the light-emitting surface of the light guide body;
  • the prism structure can also be a prism made of other light-transmitting materials, as long as the The refractive index of the material of the prism may be smaller than the refractive index of the light guide.
  • the embodiment is not particularly limited.
  • the structure of the light guide body may be other shapes, such as a circular shape, a rectangular shape or an irregular shape, in addition to the rectangular annular structure as shown in FIGS. 2A to 2C, as long as it is disposed inside.
  • the prism structure, and matching the shape of the entrance surface, can enter the light incident into it.
  • the light guiding device provided in the embodiment provides a prism structure in the light guiding body and a light incident surface matched with the prism structure, and reflects light entering the light guiding body, thereby being able to be inside the light guiding body.
  • the light diffusion treatment can be performed, and the light beams incident from the light source can be scattered and emitted from the light emitting surface of the light guide body, thereby reducing the number of light sources used, thereby achieving the purpose of uniform light emission, and is particularly suitable as a circular light.
  • the light guiding structure can be simplified, and the volume of the illuminating device can be reduced.
  • the present invention further provides a light-emitting device including a light guiding device and a light source, the light guiding device is a light guiding device provided by the embodiment of the present invention, and the light source is disposed in a prism structure in the light guiding device The opposite position is used to provide a light source for the light guiding device.
  • the present invention further provides an electronic device, including the above-mentioned illuminating device, and the electronic device may be various communication terminals, such as a mobile phone, a tablet computer, or the like, or various communication network devices, household appliances, and the like.
  • the device can be used as a light-emitting unit on the electronic device for use as a status indicator or a lighting decoration function, and the specific structure thereof will not be described herein.
  • the present invention further provides a button, the button includes a light guiding device, and the light guiding device can use the light guiding device provided by the embodiment of the present invention, and the button portion can be disposed on the light emitting surface of the light guiding body of the light guiding device.
  • the structure of the light guide device can be referred to in the description of the embodiment of the light guide device, and details are not described herein again.
  • the light-emitting material such as PC or PMMA can be used to prepare the button, and the light guiding device described in this embodiment can be set on the button, and a ring can be obtained at the top of the button, that is, the key cap through silk screen or spray laser engraving.
  • the light-transmitting area in this way, the prism structure in the light guiding device and the shape of the light-incident surface can be utilized, and after the light emitted by the light source is subjected to the secondary reflection treatment, the ring-shaped light of the hook can be emitted from the annular light-transmitting area. .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Push-Button Switches (AREA)

Abstract

一种导光装置、发光设备、电子设备和按键。该导光装置包括：导光体（1），所述导光体（1）内设置有棱镜结构，所述棱镜结构用于对进入所述导光体（1）内的光线进行反射；所述导光体（1）具有入光面（11）和出光面（12），入光面（11）为与所述棱镜结构配合的不规则表面，用于对从所述棱镜结构反射回来的光线反射至所述出光面（12）。该导光装置可有效对光源发射的入射光束进行分散，可得到均匀的出射光。

Description

导光装置、 发光设备、 电子设备和按键 本申请要求于 2012 年 6 月 6 日提交中国专利局、 申请号为 201210184148.6、 发明名称为"导光装置、 发光设备、 电子设备和按键"的中国 专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明实施例涉及导光技术， 尤其涉及一种导光装置、 发光设备、 电子设 备和按键。 背景技术
电子产品已经得到广泛的应用， 为满足电子产品外观设计或功能的需要， 通常在电子产品中设置各种发光设备， 以实现所需的灯光效果， 例如， 对于电 子产品中的按键， 为满足夜间等较暗环境下使用， 需要在按键上产生灯光， 以 在夜间使用时， 可观察到按键的位置和功能， 便于对按键进行操作。
目前， 电子产品的按键通常嵌设在电子产品的表面， 其按键的上表面通常 与电子产品的外表面平行，在夜晚等较暗环境下若没有灯光指示，若没有灯光， 按键将无法辨别， 为克服这个问题， 通常在按键位置设置发光设备， 以在按键 边缘产生环形灯光， 而产生环形灯光， 则通常是釆用导光结构来实现。 图 1A 为现有产生环形灯光的导光结构的示意图；图 1B为图 1A中 A-A向的剖视图。 如图 1A和图 1B所示， 为在按键 10的边缘产生环形灯光， 在按键 10的四周 设置有 4个 LED灯 20, 且各 LED灯 20与按键 10的边缘之间设置有导光柱 30, 4个导光柱 30在按键 10的边缘围成环形结构， 该 4个导光柱 30即为导 光结构， 可将 LED灯 20发射的光引导至按键 10的边缘， 产生环形灯光， 以 突显按键 10的位置， 并可借助发出的灯光来查看按键上的文字等按键功能信 息。 此外， 现有技术也提供一种环形导光结构， 设置在按键的边缘， 其可利用 设置在环形导光结构下方的 LED灯来提供环形灯光， 同时， 为提高环形灯光 发光的均匀性， 环形导光结构中还掺有散光粉，且环形导光结构下端均匀设置 有 4个或更多的 LED灯。
但是， 现有产生环形灯光的导光结构使用时， 为到达较好的出光效果， 提 高环形灯光的均匀性， 通常设置 4个或 4个以上的 LED灯， 这不但会增大发 光设备的体积， 还会增加发光设备的能耗。 发明内容
本发明实施例提供一种导光装置、 发光设备、 电子设备和按键， 可有效提 高导光结构的导光均匀性， 减少光源使用数量， 降低能耗。
本发明实施例提供一种导光装置， 包括：
导光体， 所述导光体内设置有棱镜结构， 所述棱镜结构用于对进入所述导 光体内的光线进行反射；
所述导光体具有入光面和出光面，所述入光面为与所述棱镜结构配合的不 规则表面， 用于对从所述棱镜结构反射回来的光线反射至所述出光面。
本发明实施例还提供一种发光设备， 包括导光装置和光源， 所述导光装置 为釆用上述本发明实施例提供的导光装置；
所述光源设置在与所述导光装置中的棱镜结构相对的位置。
另夕卜， 本发明实施例还提供一种电子设备， 包括上述本发明实施例提供的 发光设备。
进一步的， 本发明实施例还提供一种按键， 包括上述本发明实施例提供的 导光装置， 所述导光装置的导光体的出光面上设置有按键部。
本发明实施例中，通过在导光体的内设置棱镜结构以及与棱镜结构配合的 入光面，对进入导光体内的光线进行反射，从而可在导光体的内部实现对光线 减少光源的使用数量， 就可以达到均勾发光的目的，特别适合作为环形灯光等 的发光设备中， 可有效简化导光结构， 减少发光设备的体积， 减少光源使用数 量， 降低发光设备的能耗， 同时具有较好的导光效果。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作一简单地介绍， 显而易见地， 下面描 述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出 创造性劳动的前提下， 还可以根据这些附图获得其他的附图。 图 1A为现有产生环形灯光的导光结构的示意图；
图 1B为图 1A中 A-A向的剖视图；
图 2 A为本发明实施例一提供的导光装置的一个方向的立体结构示意图； 图 2B为本发明实施例一提供的导光装置的另一方向的立体结构示意图； 图 2C为本发明实施例一提供的导光装置与光源配合使用时的结构示意 图；
图 3为本发明实施例导光装置工作的原理示意图；
图 4为本发明实施例导光装置应用于电子设备时的剖面结构示意图。 具体实施方式
使本发明的目的、技术方案和优点更加清楚， 下面将结合本发明实施例中 的附图， 对本发明实施例中的技术方案进行清楚、 完整地描述， 显然， 所描述 的实施例是本发明一部分实施例， 而不是全部的实施例。基于本发明中的实施 例 ,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实 施例， 都属于本发明保护的范围。 本发明实施例提供一种导光装置， 可在导光装置内部设置棱镜结构， 利用 棱镜结构对进入导光体的光线进行反射， 并通过导光体表面形状的改进， 可将 棱镜结构反射后的光线再反射至导光体的出光面， 具体地， 该导光装置可包括 导光体， 该导光体内设置有棱镜结构， 该棱镜结构可用于对进入所述导光体内 的光线进行反射； 该导光体具有入光面和出光面，入光面为与棱镜结构配合的 不规则表面， 用于对从棱镜结构反射回来的光线反射至导光体的出光面。本实 施例提供的导光装置可对设置在位于入光面一侧光源从入光面入射进入导光 体的部分光线，利用棱镜结构和与该棱镜结构配合的不规则的入光面对其进行 可从导光体的出光面发出均勾的光线。 下面将结合附图以具体实例对本发明实施例技术方案进行详细说明。 图 2A为本发明实施例一提供的导光装置的一个方向的立体结构示意图； 图 2B为本发明实施例一提供的导光装置的另一方向的立体结构示意图；图 2C 为本发明实施例一提供的导光装置与光源配合使用时的结构示意图；图 3为本 发明实施例导光装置工作的原理示意图。 如图 2A-图 2C所示， 本实施例导光 装置包括导光体 1 , 该导光体 1为环形导光体结构， 具体地， 本实施例导光体 1为矩形的环状结构； 导光体 1一相对的两侧导光部 A1和导光部 A2上分别 设置有棱镜结构， 该棱镜结构为开设在导光体 1上的三角形开孔 2; 导光体 1 的入光面 11 , 即与设置在导光体 1下端的光源 3相对一侧的表面为与三角形 开孔 2匹配的 V形面， 本实施例中， 导光部 A1和导光部 A2的入光面均为 V 形面， 以与三角形开孔 2配合， 将经过三角形开孔 2反射的光线重新反射后， 从相应导光体 1的出光面 12射出。 本实施例中导光装置使用时， 如图 2C和图 3所示， 光源 3位于与三角形 开孔 2相对的正下方， 且三角形开孔 2的一个顶角与光源 3是正对的， 这样， 光源 3发射的光线就会以一定的入射角射入导光体 1 内， 并在三角形开孔 2 的表面产生全反射， 全反射后的光线会再次被射向入光面 11 , 而射向入光面 11的光线又会被全反射至导光体 1的出光面 12。 光源 3进入导光体 1内的光 线如图 3所示的光线 L1 , 经过三角形开孔 2而产生全反射的光线如图 3所示 的光线 L2,经过导光体 1的入光面 12而产生全反射的光线如图 3所示的光线 L3 , 本领域技术人员可以理解， 光线 L1中仅有符合入射角度条件的光线才会 在三角形开孔 2处产生全反射， 或部分产生反射和折射。 本实施例中， 光源 3发出的光线会在导光体 1的内部， 通过三角形开孔 2 而产生反射现象， 从而实现对光线的一次扩散处理； 此外， 经过三角形开孔 2 反射的光线， 在 V形入光面 11处又可以将导光体 1内扩散的光线再次产生全 反射， 并最终使光线从导光体 1的出光面 12射出。 可以看出， 由于光线在导 光体 1内部会经过棱镜结构， 即三角形开孔 2的反射作用， 而使得光线在导光 体 1内部被扩散， 这样， 从导光体 1的出光面 12发射出的光线也就会更加均 匀， 只要在导光部 A1和导光部 A2分别设置一个光源 3 , 就可以在导光体 1 的环形的导光面 12产生均勾的环状灯光， 从而可减少光源的使用数量。 本实施例中， 导光体 1是集成在按键上， 其可以作为按键的一部分， 如图 2A-图 2C所示， 导光体 1的上表面设置有按键部 13 , 且按键部 13和导光体 1 是一体成型， 按键部 13上与导光体 1的出光面对应的位置之外的区域可设遮 光区， 从而形成一个环状透光区， 这样， 从导光体的出光面发射的光线就可以 通过该环状透光区发射出来， 形成环状灯光， 以满足按键的发光需要。
图 4为本发明实施例导光装置应用于电子设备时的剖面结构示意图。如图 4所示， 本实施例导光装置集成在按键 4上， 并应用于电子设备 5中， 其中光 源 3位于导光装置中与三角形开孔 2相对的下端位置， 用于提供光， 该光源 3 为 LED灯， 按键 4上设置有与电子设备 5安装配合的支撑部， 这样， 电子设 备 5工作时， 就可以控制光源 3 , 光源 3发射出的光线进入到导光体 1后， 就 可以在其内的三角形开孔 2和入光面 （图中未示出）作用下产生二次全反射， 并最终从按键 4上部的环形发光区域发射出环形灯光。 本实施例中， 为使导光体 1内的光线在三角形开孔 2的表面处， 以及入光 面 12处能够产生全反射， 以使光线可全部或大部分能从导光体 1的出光面 12 射出， 导光体 1 的折射率应该大于空气的折射率； 此外， 光源进入导光体 1 的光线射向三角形开孔 2的表面的入射角应该大于导光体的临界角（即光线在 导光体内部可产生全反射的最小的角度）， 同样地， 经过三角形开孔 2的表面 反射的光线， 射向导光体 1的入光面 12的入射角也应大于导光体的临界角。 为满足上述条件， 导光体 1可由折射率大于空气的折射率的材料制备而成； 光 源 3与三角形开孔 2之间的距离，三角形开孔 2的结构中三角形的角度要合理 设置，以使光源 3发射的大部分光线可以大于导光体的临界角的入射角射向导 光体 1内的三角形开孔 2的表面，以便大部分光线可在三角形开孔 2的表面产 生全反射； 三角形开孔 2的结构与 V形入光面 12之间要匹配， 即入光面 12 的 V形角度要合理设置， 以使三角形开孔 2的结构反射至入光面 12的光线可 在入光面 12处产生全反射， 并从导光体 1的出光面 12射出。 实际应用中， 导光体可釆用亚加力 PMMA或聚碳酸酯 PC来制备， 其中 PMMA的折射率为 1.48-1.5, PC的折射率为 1.59, 而空气的折射率为 1.0, PMMA产生全反射的入射角， 即临界角为 42度； PC产生全反射的入射角即 临界角为 39度。 因此， 可根据釆用的不同折射率的材料， 合理布置三角形开 孔的尺寸、 V形入光面的尺寸以及光源与导光体的距离，对于本领域技术人员 来说， 对于釆用不同折射率材料的导光体， 其中的三角形开孔尺寸、 V形入光 面的尺寸以及光源与导光体的距离可根据实际而设定， 在此不再——赘述。
优选地， 本实施例釆用 PMMA材料制备的导光体， 具体地， 如图 2C所 示， 三角形开孔 2 的结构中， 与光源 3相对的角度为 Θ 1=110° , 入光面 12 的 V形夹角 Θ 2=144。 ， 且入光面 12的端部为平面， 以便光源 3发射的光线 可直接射入到导光体 1内部。
本领域技术人员可以理解， 上述与导光装置配合的光源为点光源， 具体可 以为 LED灯； 此外， 导光装置中的棱镜除了可以对光源发出的光线进行扩散， 实现均勾出光外， 该棱镜结构还可对有效衰减与光源对应位置的光线的强度， 从而使得从出光面出射的光线更加均匀、 柔和。 本领域技术人员可以理解， 通过合理配置光源与三角形开孔之间的距离， 以及 V形入光面的角度， 就可以合理调整光线在导光体内部的扩散程度， 从 而可调整从导光体的出光面发射出的光线的均勾度； 此外， 由于光源射入导光 体内的光线的角度是不同的，实际上只有部分光线才会因棱镜结构而在导光体 内部扩散， 且扩散的角度不同， 一个光源发射的光束经过棱镜结构和入光面的 两次反射后， 基本可以在形成较大面积或长度的出光效果， 因此， 对于环形结 构的导光体而言， 只要设置两个光源就可以形成出光均勾的环形灯光效果。
本领域技术人员可以理解，设置在导光体 1内的棱镜结构除了可以是如图
2A-图 2C所示的三角形开孔结构外， 也可以是其他结构的形状， 只要可对光 源射入的光线能够进行全反射即可， 相应地， 随着棱镜结构的不同， 导光体的 入光面的形状也应做匹配的调整，以确保导光体内的光线可均勾的从导光体的 出光面射出； 此外， 棱镜结构也可以是其他透光材料制成的棱镜， 只要该棱镜 的材料的折射率小于导光体的折射率即可。 对此， 本实施例并不做特别限制。 本领域技术人员可以理解， 导光体的结构除了如图 2A-图 2C所示的矩形 的环状结构外， 也可以是其他形状， 例如圓形、 矩形或不规则形状， 只要在其 内部设置棱镜结构， 并对入光面形状做匹配设置， 就可以将射入其内的光线进
综上， 本实施例提供的导光装置， 通过在导光体的内设置棱镜结构以及与 棱镜结构配合的入光面，对进入导光体内的光线进行反射，从而可在导光体的 内部实现对光线的扩散处理，可将光源射入的光束均勾分散的从导光体的出光 面射出， 从而可减少光源的使用数量， 就可以达到均勾发光的目的， 特别适合 作为环形灯光等的发光设备中， 可有效简化导光结构， 减少发光设备的体积， 减少光源使用数量， 降低发光设备的能耗， 同时具有较好的导光效果。 此外， 本发明还提供一种发光设备， 该发光设备包括导光装置和光源， 该 导光装置为釆用上述本发明实施例提供的导光装置，光源设置在与导光装置中 的棱镜结构相对的位置， 用于为导光装置提供光源。 进一步地， 本发明还提供一种电子设备， 包括上述的发光设备， 该电子设 备具体可以是各种通讯终端，例如手机、平板电脑等，或者各种通讯网络设备、 家用电器设备等， 该发光设备可以作为该些电子设备上的一个发光单元， 用于 作为状态指示或灯光装饰功能， 其具体结构在此不再赘述。 另外， 本发明还一种按键， 该按键包括有导光装置， 该导光装置可釆用上 述本发明实施例提供的导光装置，按键部可设置在导光装置的导光体的出光面 上， 且按键部与导光体可一体成型， 其中一个实施方式可参见图 2A-图 2C所 示的结构， 具体可参见上述导光装置实施例的说明， 在此不再赘述。 实际应用中， 可利用 PC或 PMMA等透光材料制备按键， 并在按键上设 置本实施例所述的导光装置， 可在按键的顶部， 即键帽通过丝印或喷涂镭雕获 得一环状透光区，这样 ,就可以利用导光装置中的棱镜结构以及入光面的形状， 对光源发射的光线进行二次反射处理后 ,就可以从环状透光区发出均勾的环状 灯光。 最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非对其 限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的普通技术 人员应当理解： 其依然可以对前述各实施例所记载的技术方案进行修改， 或者 对其中部分或者全部技术特征进行等同替换； 而这些修改或者替换， 并不使相 应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求
1、 一种导光装置， 其特征在于， 包括：
导光体， 所述导光体内设置有棱镜结构， 所述棱镜结构用于对进入所述导 光体内的光线进行反射；
所述导光体具有入光面和出光面，所述入光面为与所述棱镜结构配合的不 规则表面， 用于对从所述棱镜结构反射回来的光线反射至所述出光面。
2、 根据权利要求 1所述的导光装置， 其特征在于， 所述棱镜结构为三角形 棱镜结构。
3、 根据权利要求 2所述的导光装置， 其特征在于， 所述棱镜结构为开设在 所述导光体内的三角形开孔结构。
4、根据权利要求 3所述的导光装置，其特征在于，所述三角形开孔结构中， 三角形开孔的一个顶角与所述光源对应；
所述入光面为与所述三角形通孔结构形状匹配的 V形面。
5、 根据权利要求 1-4任一所述的导光装置， 其特征在于， 所述导光体为环 形导光体；
所述环形导光体的一相对的两侧分别设置有棱镜结构。
6、 根据权利要求 5所述的导光装置， 其特征在于， 所述环形导光体为矩形 环状结构。
7、 根据权利要求 1所述的导光装置， 其特征在于， 所述导光体为亚加力材 料或聚碳酸酯材料制成。
8、 一种发光设备， 其特征在于， 包括导光装置和光源， 所述导光装置为 釆用权利要求 1 -7任一所述的导光装置；
所述光源设置在与所述导光装置中的棱镜结构相对的位置。
9、 一种电子设备， 其特征在于， 包括权利要求 8所述的发光设备。
10、 一种按键， 其特征在于， 包括权利要求 1-7任一所述的导光装置， 所述导 光装置的导光体的出光面上设置有按键部。
PCT/CN2013/076403 2012-06-06 2013-05-29 导光装置、发光设备、电子设备和按键 WO2013182003A1 (zh)

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JP2015222629A (ja) * 2014-05-22 2015-12-10 スタンレー電気株式会社 装飾照明装置
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CN102721996A (zh) 2012-10-10

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