CN103591485A - 发光装置 - Google Patents

发光装置 Download PDF

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CN103591485A
CN103591485A CN201210350732.4A CN201210350732A CN103591485A CN 103591485 A CN103591485 A CN 103591485A CN 201210350732 A CN201210350732 A CN 201210350732A CN 103591485 A CN103591485 A CN 103591485A
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light
emitting device
conversion unit
wavelength conversion
luminescence component
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陈正言
陈冠文
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Genesis Photonics Inc
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/08—Combinations of only two kinds of elements the elements being filters or photoluminescent elements and reflectors
    • 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
    • G02B6/0005—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 of the fibre type
    • G02B6/0008—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 of the fibre type the light being emitted at the end of the fibre
    • 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
    • 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
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into 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, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into 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, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [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
    • G02B6/0066—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
    • G02B6/0073—Light emitting diode [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
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)

Abstract

本发明提供一种发光装置，包括导光单元、至少一发光组件及波长转换单元。导光单元具有相对的第一端与第二端。发光组件配置在第一端上，且发出第一光。波长转换单元配置在第二端上。导光单元将发光组件所发出的第一光从第一端导引至第二端，且波长转换单元将第一光转换成第二光，其中第一光的波长不同于第二光的波长。

Description

发光装置
技术领域
本发明涉及一种发光装置。
背景技术
随着光电技术的演进，发光组件的发光机制也从热致发光(thermoluminescence)演进为电致发光(electroluminescence，EL)。采用电致发光机制的发光组件通常具有较窄的发光波长范围，为了达到不同的发光颜色或较广的发光波长范围，采用荧光体来转换发光组件所发出的光的波长为其中一种常用的方法。
在现有的发光装置中，通常是将荧光体涂布在发光组件上，以使发光组件所发出的光会经过荧光体，而被荧光体转换成不同波长的光。然而，荧光体的波长转换效率容易受热衰减，且涂布在发光组件上的荧光体常会受到发光组件工作时所产生的热，如此会造成发光装置的亮度下降与色偏。
发光二极管为其中一种采用电致发光机制的发光组件。发光二极管具有高指向性(directivity)，亦即其所发出的光偏向于某一特定的方向。此外，发光二极管通常外接电路驱动模块(如电路板)，因此较难做到全指向性光源。
另外，除了采用电致发光机制的发光组件之外，采用其它发光机制的发光组件在搭配荧光体时，发光组件的工作温度也容易影响到荧光体的转换效率。
发明内容
本发明提供一种发光装置，其具有稳定且良好的发光亮度与发光颜色。
本发明的一实施例提出一种发光装置，其包括导光单元、至少一发光组件及波长转换单元。导光单元具有相对的第一端与第二端。发光组件配置在第一端上，且发出第一光。波长转换单元配置在第二端上。导光单元将发光组件所发出的第一光从第一端导引至第二端，且波长转换单元将第一光转换成第二光，其中第一光的波长不同于第二光的波长。
在本发明的实施例的发光装置中，由于发光组件所发出的第一光是通过导光单元导引至波长转换单元，且发光组件与波长转换单元之间设有导光单元，所以发光组件在工作时所产生的热较不易传递至波长转换单元。如此一来，波长转换单元的转换效率较不会受热衰减，进而使本发明的实施例的发光装置具有稳定且良好的发光亮度与发光颜色。
为让本发明的上述特征和优点能更明显易懂，下文特举实施例，并配合所示附图作详细说明如下。
附图说明
图1为本发明的一实施例的发光装置的剖面示意图；
图2示出图1中的导光体的出光面的另一种变化的剖面示意图；
图3为本发明的另一实施例的发光装置的剖面示意图；
图4为本发明的又一实施例的发光装置的剖面示意图；
图5为本发明的再一实施例的发光装置的剖面示意图；
图6为本发明的另一实施例的发光装置的立体示意图。
附图标记说明：
100、100b、100c、100d、100e：发光装置；
110：发光组件；
112：第一光；
120、120e：波长转换单元；
122：第二光；
130：底座；
140：扩散组件；
142：内表面；
144：外表面；
150：灯头；
160：透光灯壳；
200、200c、200e：导光单元；
202、202e：第一端；
204、204e：第二端；
210、210a：导光体；
212：入光面；
214、214a：出光面；
216：侧面；
220：反射组件；
L：直线；
O 1、O2：开口。
具体实施方式
图1为本发明的一实施例的发光装置的剖面示意图。请参照图1，本实施例的发光装置100包括导光单元200、至少一发光组件110(图1中是以一个发光组件110为例)及波长转换单元120。导光单元200具有相对的第一端202与第二端204。发光组件110配置在第一端202上，且发出第一光112。波长转换单元120配置在第二端204上。导光单元200将发光组件110所发出的第一光112从第一端202导引至第二端204，且波长转换单元120将第一光112转换成第二光122，其中第一光112的波长不同于第二光122的波长。
在本实施例中，导光单元200包括导光体210，且第一光112适于在导光体210中传递。在本实施例中，导光体210为导光柱，例如为透明导光柱。此外，导光体210具有入光面212、相对于入光面212的出光面214及连接入光面212与出光面214的侧面216，其中入光面212位于第一端202，出光面214位于第二端204，且导光柱从第一端202延伸至第二端204。
此外，在本实施例中，导光单元200还包括反射组件220，其围绕导光体210，且在第一端202与第二端204处暴露出导光体210。举例而言，反射组件220配置在导光体210的侧面216，且反射组件220为导光体210上的反射层，例如是反射镀层。发光组件110所发出的第一光112在通过入光面212进入导光体210后，会被反射组件220不断地反射，并接着从导光体210的出光面214射出。因此，导光单元200能够确实地将第一光112从第一端202传递至第二端204。
在本实施例中，发光组件110为发光二极管芯片，而波长转换单元120为荧光体。举例而言，发光组件110所发出的第一光112例如为蓝光，而波长转换单元120例如是把呈蓝色的第一光112转换成呈黄色的第二光122。如此一来，从波长转换单元120射出的第二光122及未被波长转换单元120转换的第一光112便能够混合成白光。本实施例中所举出的第一光112与第二光122的颜色是用以举例，在其它实施例中，第一光112与第二光122也可以是其它颜色的光。
在本实施例的发光装置100中，由于发光组件110所发出的第一光112是通过导光单元210导引至波长转换单元120，且发光组件110与波长转换单元120之间设有导光单元200，所以发光组件110在工作时所产生的热较不易传递至波长转换单元120。如此一来，当发光装置100工作时，波长转换单元120的温度可以较低，因此波长转换单元120的转换效率较不会受热衰减，进而使本实施例的发光装置100具有稳定且良好的发光亮度与发光颜色。
另外，由于波长转换单元120所转换而成的第二光122的指向性较低，因此也能降低发光装置100的指向性。换言之，可使发光装置100所发出的光较能广泛地照射于各个角度。
在本实施例中，导光体210的出光面214为曲面，此曲面可用以调整第一光112的出光光形。在本实施例中，出光面214是以凸面为例，然而，在其它实施例中，出光面214也可以是凹面。在另一实施例中，如图2所示出，导光体210a的出光面214a也可以是平面。
再者，在本实施例中，发光装置100还包括底座130，而发光组件110与导光单元200皆配置在底座130上。底座130具有散热及固定的用途。
图3为本发明的另一实施例的发光装置的剖面示意图。请参照图3，本实施例的发光装置100b与图1的发光装置100类似，而两者的差异如下所述。请参照图3，本实施例的发光装置100b还包括扩散组件140，其配置在第二端204，且包覆波长转换单元120。举例而言，扩散组件140例如是具有粗糙表面的透光容器，其可容纳波长转换单元120，而粗糙表面的粗糙度Ra是落在0.2微米至20微米的范围内。此外，扩散组件140的内表面142及外表面144的至少其中之一为此粗糙表面。扩散组件140的粗糙度Ra大于0.2微米，故具有光散射效果，因此当发光装置100b不点亮时，使用者便较不易直接看到波长转换单元120的外貌与颜色，又扩散组件140的粗糙度Ra小于20微米，因此当发光装置100b点亮时也不会因扩散组件140而产生过多的光耗损。此外，当发光装置100b点亮时，扩散组件140可将未被波长转换单元120转换的第一光112散射，而使得第一光112除了往上射出第二端204之外，也可往下射出第二端204。如此一来，便可有效降低发光装置100b的整体指向性，进而使发光装置100b所发出的光能够广泛地射向各个不同的角度。
图4为本发明的又一实施例的发光装置的剖面示意图。请参照图4，本实施例的发光装置100c与图1的发光装置100类似，而两者的差异如下所述。在本实施例的发光装置100c中，导光单元200c为中空反射罩，其具有分别位于第一端202与第二端204的二开口O 1与O 2。在本实施例中，中空反射罩为空心反射管，其从第一端202延伸至第二端204。发光组件110所发出的第一光112从第一端202传递至第二端204，并通过开口O 2传递至波长转换单元120。本实施例的导光单元200c也能有效地将第一光112从第一端202传递至第二端204。
图5为本发明的再一实施例的发光装置的剖面示意图。请参照图5，本实施例的发光装置100d与图3的发光装置100b类似，而两者的差异如下所述。本实施例的发光装置100d还包括灯头150及透光灯壳160。灯头150配置在第一端202旁，且电性连接至发光组件110。透光灯壳160配置在灯头150上，且罩盖导光单元200、发光组件110及波长转换单元120。在本实施例中，透光灯壳160为清澈的透明灯壳，且透光灯壳160也罩盖扩散组件140。然而，在另一实施例中，透光灯壳160也可以是雾面灯壳，此时发光装置可以选择不采用扩散组件140，这是因为雾面灯壳也可达到散射效果。
图6为本发明的另一实施例的发光装置的立体示意图。请参照图6，本实施例的发光装置100e与图1额发光装置100类似，图6的发光装置100e在割面I-I上的剖面与图1所示出的发光装置100的剖面相同，而图6的发光装置100e与图1的发光装置100的差异如下所述。本实施例的发光装置100e具有多个发光组件110，这些发光组件110在导光单元200e第一端202e上沿着直线L排列，导光单元200e为导光板，此波长转换单元120e在导光单元200e的第二端204e上沿着平行于直线L的方向延伸。如此一来，发光装置100便可形成线光源。
综上所述，在本发明的实施例的发光装置中，由于发光组件所发出的第一光是通过导光单元导引至波长转换单元，且发光组件与波长转换单元之间设有导光单元，所以发光组件在工作时所产生的热较不易传递至波长转换单元。如此一来，波长转换单元的转换效率较不会受热衰减，进而使本发明的实施例的发光装置具有稳定且良好的发光亮度与发光颜色。
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 (14)

1.一种发光装置，其特征在于，包括：
导光单元，具有相对的第一端与第二端；
至少一发光组件，配置在该第一端上，且发出第一光；以及
波长转换单元，配置在该第二端上，其中该导光单元将该发光组件所发出的该第一光从该第一端导引至该第二端，该波长转换单元将该第一光转换成第二光，且该第一光的波长不同于该第二光的波长。
2.根据权利要求1所述的发光装置，其特征在于，该导光单元包括导光体，且该第一光适于在该导光体中传递。
3.根据权利要求2所述的发光装置，其特征在于，该导光单元还包括反射组件，围绕该导光体，且在该第一端与该第二端处暴露出该导光体。
4.根据权利要求2所述的发光装置，其特征在于，该导光体为导光柱。
5.根据权利要求2所述的发光装置，其特征在于，该导光体为导光板，该至少一发光组件为多个发光组件，在该第一端上沿着直线排列，且该波长转换单元在该第二端上沿着平行于该直线的方向延伸。
6.根据权利要求2所述的发光装置，其特征在于，该导光体具有出光面，位于该第二端，且该出光面为曲面或平面。
7.根据权利要求2所述的发光装置，其特征在于，该导光单元为中空反射罩，具有分别位于该第一端与该第二端的二开口。
8.根据权利要求1所述的发光装置，其特征在于，还包括扩散组件，配置在该第二端，且包覆该波长转换单元。
9.根据权利要求8所述的发光装置，其特征在于，该扩散组件具有粗糙表面，该粗糙表面的粗糙度Ra落在0.2微米至20微米的范围内。
10.根据权利要求1所述的发光装置，其特征在于，该发光组件为发光二极管芯片。
11.根据权利要求1所述的发光装置，其特征在于，该波长转换单元为荧光体。
12.根据权利要求1所述的发光装置，其特征在于，还包括：
灯头，配置在该第一端旁，且电性连接至该发光组件；以及
透光灯壳，配置在该灯头上，且罩盖该导光单元、该发光组件及该波长转换单元。
13.根据权利要求12所述的发光装置，其特征在于，该透光灯壳为清澈的透明灯壳。
14.根据权利要求12所述的发光装置，其特征在于，该透光灯壳为雾面灯壳。
CN201210350732.4A 2012-08-13 2012-09-20 发光装置 Pending CN103591485A (zh)

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