WO2010083637A1 - Led光源及使用该光源的led灯具 - Google Patents

Led光源及使用该光源的led灯具 Download PDF

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Publication number
WO2010083637A1
WO2010083637A1 PCT/CN2009/001520 CN2009001520W WO2010083637A1 WO 2010083637 A1 WO2010083637 A1 WO 2010083637A1 CN 2009001520 W CN2009001520 W CN 2009001520W WO 2010083637 A1 WO2010083637 A1 WO 2010083637A1
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WIPO (PCT)
Prior art keywords
led light
lens
luminaire
emitting diode
power led
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2009/001520
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English (en)
French (fr)
Inventor
张文虎
郑秋华
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Shanghai Cata Signal Co Ltd
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Shanghai Cata Signal Co Ltd
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Filing date
Publication date
Application filed by Shanghai Cata Signal Co Ltd filed Critical Shanghai Cata Signal Co Ltd
Priority to AU2009338040A priority Critical patent/AU2009338040A1/en
Priority to US13/129,877 priority patent/US20110228534A1/en
Publication of WO2010083637A1 publication Critical patent/WO2010083637A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/002—Table lamps, e.g. for ambient lighting
    • F21S6/003—Table lamps, e.g. for ambient lighting for task lighting, e.g. for reading or desk work, e.g. angle poise lamps
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional [2D] 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]

Definitions

  • the present invention relates to LED lighting fixtures, and more particularly to a high power LED light source, and to a high power LED light fixture using the light source and the use of the light fixture. Background technique
  • TIR total reflection resin concentrating
  • the total reflection resin concentrating (TIR) lens 1 is mostly composed of a solid transparent resin.
  • the outer surface of the entire transparent resin is required to be highly smooth, the internal density is highly uniform, and the transmittance is high. Therefore, this total reflection resin concentrating (TIR) lens 1 is complicated in production process and high in cost. More importantly, a single total reflection resin concentrating (TIR) lens 1 can only produce LED light source products with a small spot size, and cannot produce large surface light source LED luminaire products, thus affecting the scope of application and the illuminating effect of the luminaire.
  • One of the technical problems to be solved by the present invention is to provide a high-power LED light source equipped with a front collecting lens to solve the problem of low luminous efficiency of the existing high-power LED light source, and the lack of light, non-softness, etc. Luminous effect problem.
  • a second technical problem to be solved by the present invention is to provide a lamp using the above LED light source.
  • the third technical problem to be solved by the present invention is to provide the use of the above lamp.
  • the concentrator includes an LED light-emitting diode and a pair of LED light-emitting diodes, wherein the concentrator is a concave mirror, and the LED light-emitting diode a light emitting portion of the tube, located at a focus of the concave mirror; further comprising a converging lens, wherein the converging lens is located
  • the focus position of the converging lens is located at the light-emitting portion of the LED light-emitting diode, and may also be disposed near the light-emitting portion of the LED light-emitting diode according to the design requirements of the optical path to meet the functional requirements of different lamps.
  • the light-emitting portion of the LED light-emitting diode is located at the focus of the concave mirror, which is advantageous for generating a highly collimated light beam and forming a surface light source.
  • the converging lens may be a lens having a converging effect, such as a convex lens, preferably a Fresnel lens, for fully concentrating the scattered light of the LED light source outside the concave condensing angle of the concave mirror, so that the LED light source The overall convergence efficiency is the highest.
  • the luminaire of the second aspect of the present invention includes a casing, wherein a plurality of high-power LED light sources are densely arranged in the casing, and each of the high-power LED light sources includes an LED light-emitting diode and a pair of LED light-emitting diodes for concentrating a concentrator, the concentrator is a concave mirror, a light emitting portion of the LED light emitting diode is located at a focus of the concave mirror; and further includes a converging lens, the converging lens is located in front of the LED light emitting diode The focus position of the converging lens is located at the light-emitting portion of the LED light-emitting diode.
  • the light-emitting portion of the LED light-emitting diode is located at the focus of the concave mirror, which is favorable for generating a collimated light beam with higher efficiency, and a plurality of densely arranged high-power LED light sources form a suitable high-density collimated light beam for the surface light source. In order to facilitate the design of the light distribution function of the lamp.
  • the converging lens may be a lens having a converging effect, such as a convex lens, preferably a Fresnel lens.
  • the concave mirror and the converging lens of each high-power LED light source are aligned in the direction in which the light is concentrated, that is, the emitted directions of the generated light beams are uniform.
  • the use of a plurality of LED light-emitting diodes can effectively increase the light intensity, and the above technical solution can effectively improve the directivity of the light.
  • the concave mirrors of each of the high power LED light sources are located in the same plane and are closely arranged. In this way, the light beams generated by the respective LED light-emitting diodes can be arranged closely, which is beneficial to the full and uniform light-emitting type of the light-emitting type of the lamp, and the glare highlights without the cloth.
  • the plurality of high-power LED light sources may be arranged in a honeycomb shape or in a rectangular array.
  • the concave mirrors of each of the high power LED light sources are connected to each other.
  • each of the high power LED light sources may be separately disposed at their proper positions relative to the LED light source, or may be connected to each other to form a unitary form sheet disposed at a suitable position corresponding to the LED light source.
  • the LED light-emitting diode of each high-power LED light source is disposed on the printed circuit board.
  • a metal-based heat sink is disposed on the printed wiring board.
  • the LED light emitting diode of the high-power LED light source may be a single-chip high-power LED light-emitting diode of a single color, or a multi-chip high-power LED light-emitting diode of a single color, or a multi-chip color change and high power. LED light-emitting diodes.
  • a transparent cover is provided in front of the condenser lens of a plurality of high-power LED light sources, or a diffusion lens having a function of diffusing light distribution to light.
  • the mirror portion of the diffusion lens is densely covered with diffusion particles.
  • the diffusing particles are lenses having a diffused light effect. Through the diffusion lens, the light beam generated by each LED light-emitting diode is diverged to meet the requirements of different functions of the lamp. If a diffuser lens that is atomized or added with a light diffusing agent is used, the overall light output of the lamp can be further filled and softened.
  • the convergent lens of the present invention employs a convex lens, since the optical parameters of the convex lens are easy to grasp, and the mold cost is low, it is easy to produce, and the surface of the convex lens is smooth, and it is easy to keep clean.
  • the condenser lens of the present invention adopts a Fresnel lens, since the Fresnel lens has less consumables, it is advantageous to reduce the product cost and to reduce the overall weight of the product.
  • a pair of heat-dissipating rear covers of the LED light-emitting diodes for dissipating heat are disposed behind the casing, and the metal-based heat dissipation plate is pressed against the heat-dissipating back cover.
  • the lighting fixture can be applied to room lighting fixtures or to automotive lighting fixtures or road lighting fixtures or advertising lighting fixtures or searchlight fixtures.
  • the present invention is particularly applicable to high power LED lamps having a single LED light emitting diode power greater than 0.5W.
  • the original high-power LED lamps use only a total reflection lens as a concentrator, and a single total reflection resin concentrating (TIR) lens is often used as a concentrator.
  • TIR total reflection resin concentrating
  • Totally reflective resin concentrating (TIR) lenses are mostly composed of a solid transparent resin. The outer surface of the entire transparent resin is required to be highly smooth, the internal density is highly uniform, and the transmittance is high. Therefore, this total reflection resin concentrating (TIR) lens production process is complicated and costly. More importantly, a single total reflection resin concentrating (TIR) lens can only produce small light source products and cannot produce large diameter LED light source products.
  • the number of LED light-emitting diodes is limited, and the lamps made with the light source products have a thin beam, and when the LED light-emitting diodes are arranged sparsely, the lamps will generate a large amount of light.
  • this kind of star-studded glare highlights affect the fullness and softness of the overall light output of high-power LED lamps to a certain extent, affecting the lighting effect and application range of the lamps.
  • Concave mirrors are commonly used concentrators for lamps, flashlights, etc., which are low in cost and easy to produce large-caliber concave mirrors.
  • a convex lens or a Fresnel lens as a converging lens This low-profile feature makes it easy to produce large-area convex lenses or Fresnel lenses.
  • the cross-sectional area of the light beam can be effectively increased.
  • Figure 1 is a schematic diagram of the structure of the original high-power LED lamps.
  • FIG. 2 is a cross-sectional structural view of the lamp of the present invention and the high power LED light source used.
  • FIG. 3 is a front view showing the structure of the lamp of the present invention and the high power LED light source used.
  • FIG. 4 is a schematic structural view of a specific application product of the present invention.
  • FIG. 5 is a schematic structural view of another specific application product of the present invention.
  • FIG. 6 is a schematic view showing the structure of still another specific application product of the present invention. detailed description
  • the luminaire includes a casing 2, and a plurality of high-power LED light sources are arranged in the casing 2, and the high-power LED light sources may be arranged in a honeycomb shape or in a rectangular array (as shown in FIG. 2). ).
  • Each of the high-power LED light sources includes an LED light-emitting diode 21, and the LED light-emitting diode 21 is covered with a concave mirror 22 that converges the light.
  • the light-emitting portion of the LED light-emitting diode 21 is located at the focus of the concave mirror 22.
  • a condenser lens 23 is disposed in front of the LED light-emitting diode 21, and a focus of the condenser lens 23 is located at a light-emitting portion of the LED light-emitting diode 21. Conducive to the production of a more collimated beam, suitable for the need for a more collimated beam.
  • the converging lens 23 may be a convex lens or a Fresnel lens.
  • the original high-power LED lamps mostly use only a total reflection lens as a concentrator, and a single total reflection resin concentrating (TIR) lens 1 is often used as a concentrator.
  • the total reflection resin concentrating (TIR) lens 1 is mostly composed of a solid transparent resin. The outer surface of the entire transparent resin is required to be highly smooth, the internal density is highly uniform, and the transmittance is high. Therefore, the total reflection resin concentrating (TIR) lens 1 is complicated in production process and high in cost. More importantly, this total reflection resin concentrating (TIR) lens 1 can only produce small light source products and cannot produce large diameter LED light source products. Therefore, only a thin beam of light concentrated can be generated.
  • the number of LED light-emitting diodes is limited.
  • the LED light-emitting diodes are arranged sparsely, they will generate a large number of bright spots, which are glaring highlights of the stars. To a certain extent, it affects high-power LED lights
  • the fullness and softness of the overall outgoing light type affects the lighting effect and application range of the luminaire.
  • a concave mirror 22 and a converging lens 23 are selected instead of the original total reflection resin concentrating (TIR) lens 1.
  • TIR total reflection resin concentrating
  • Concave mirrors are commonly used concentrators for lamps, flashlights, etc., which are low in cost and easy to produce large-caliber concave mirrors 22.
  • the convex lens or the Fresnel lens as the converging lens 23 is also low in cost, and is easy to produce a large-area convex lens or Fresnel lens.
  • the LED light-emitting diodes 21 are sparsely arranged, a large number of bright spots are not generated, so that the overall power of the high-power LED lamps is full and soft, and the luminous effect and application range of the lamps are improved.
  • the convergent lens 23 of the present invention employs a convex lens
  • the optical parameters of the convex lens are easy to grasp, and the mold cost is low, it is easy to produce, and the surface of the convex lens is smooth, and it is easy to keep clean.
  • the condenser lens 23 of the present invention adopts a Fresnel lens, since the Fresnel lens has less consumables, it is advantageous to reduce the product cost and to reduce the overall weight of the product.
  • the converging directions of the concave mirrors 22 and the converging lenses 23 of each of the high-power LED light sources are uniform, that is, the emitted directions of the generated light beams are uniform.
  • the use of a plurality of LED light-emitting diodes can effectively improve the light intensity, and the above technical solution can effectively improve the directivity of the light.
  • each of the high power LED light sources are located in the same plane and are closely connected to each other. In this way, the light beams generated by the respective LEDs are closely arranged, which is beneficial to make the overall outgoing light type full and soft.
  • Each of the converging lenses 23 corresponding to the high power LED light source can also be interconnected to form a single piece for the mounting of the lens.
  • the LED light-emitting diodes 21 of each high-power LED light source are disposed on a printed circuit board 26, and a metal-based heat sink is disposed on the printed circuit board 26, and a pair of LED light-emitting diodes 21 are disposed behind the outer casing 2 to dissipate heat. 25, the metal base heat sink and the heat dissipation back cover 25 are pressed to facilitate heat dissipation of the LED light emitting diode 21.
  • the LED light-emitting diode of the high-power LED light source can be a monochromatic single-chip high-power LED light-emitting diode, a multi-chip high-power LED light-emitting diode, or a multi-chip color-changing high-power LED light-emitting diode.
  • a diffusing lens 24 for diffusing light is provided in front of the converging lens 22 of a plurality of high power LED light sources.
  • the mirror portion of the diffusion lens 24 is densely covered with diffusion particles.
  • the diffusing particles are convex lenses.
  • the diffusing lens 24 performs a certain directional divergence of the collimated light beams generated by the convergence of the respective LED light-emitting diodes to meet the light distribution requirements of different functions of the lamps. If equipped with a diffuser lens that is atomized or added with a light diffusing agent, the overall light output of the luminaire can be further filled and softened.
  • the luminaire can be applied to a work lighting fixture, such as the worklight 31 shown in FIG. Or applied to automotive lighting fixtures, such as the interior trim light 32 shown in FIG. Or room lighting, as shown in Figure 6.
  • the luminaire of the present invention can be used to make a flashlight.
  • the basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is described in the foregoing description and the description of the present invention. Such changes and modifications are intended to fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

LED光源及使用该光源的 LED灯具
技术领域
本发明涉及 LED照明灯具， 特别涉及一种大功率 LED光源， 还涉及使用该光源的大 功率 LED灯具和该灯具的用途。 背景技术
目前全世界都在寻求解决经济发展和能源短缺的矛盾， 随着发光二极管即 LED技术 的日趋成熟， 成本快速下降， LED在汽车灯具、 交通信号设备以及照明领域得到愈来愈广 泛的应用。 LED照明灯具的开发应用必将给整个节能照明和绿色照明行业带来广阔的市场 前景与新的经济发展机遇， 而大功率 LED发光二极管则是照明灯具的必然选择。
由于近年来国内外在这种大功率 LED灯具产品的设计应用当中， 基本上都是采用单 个全反射树脂聚光（TIR)透镜 1配相应大功率 LED发光二极管的光学模型来实现对光能' 的收集和光线的准直 (参见图 1)。 全反射树脂聚光（TIR)透镜 1大都是由一块实体的透明. 树脂构成。 要求整块透明树脂外表面高度光洁， 内部密度高度均匀， 且透光度高。 因此这 种全反射树脂聚光 （TIR) 透镜 1生产工艺复杂， 成本很高。 更重要的是单个的全反射树 脂聚光 （TIR) 透镜 1只能制造光点较小的 LED光源产品， 无法生产大型的面光源 LED 灯具产品， 因此影响了适用范围及灯具的发光效果。
除上述问题之外，在实际产品使用当中发现这样的采用这种光学模型的灯具还存在着 灯具总体出光效率较低， 以及灯具的出光面上因区域性光线相对集中而突现明显亮点等许 多不足。 在 LED发光二极管排布稀疏的情况下， 会产生大量的亮点， 这种星星点点的亮 点在一定程度上影响了大功率 LED灯具整体出光的饱满及柔和。 发明内容
本发明所要解决的技术问题之一是提供一种装有前置汇聚透镜的大功率 LED光源， 以解决现有的大功率 LED光源发光效率低的问题， 以及出射光型不饱满、 不柔和等发光 效果问题。
本发明所要解决的技术问题之二是提供一种使用上述 LED光源的灯具。
本发明所要解决的技术问题之三是提供上述灯具的用途。
作为本发明第一方面的大功率 LED光源， 包括一 LED发光二极管和一对 LED发光 二极管光线进行汇聚的聚光器， 其特征在于， 所述聚光器为凹面镜， 所述 LED发光二极 管的发光部位， 位于所述凹面镜的焦点处； 还包括一汇聚透镜， 所述汇聚透镜位于所述
LED发光二极管前方， 所述汇聚透镜的焦点位置位于 LED发光二极管的发光部位， 也可 以根据光路设计要求设置在 LED发光二极管的发光部位附近以满足不同灯具功能需要。 所述 LED发光二极管的发光部位， 位于所述凹面镜的焦点处， 有利于产生高效准直的光 束， 并形成面光源。
所述汇聚透镜可以是具有汇聚作用的透镜， 如凸透镜， 优选为菲涅尔透镜， 其作用是 对 LED光源在凹面镜前方聚光包角以外的散射光进行充分聚光， 使该 LED光源的整体汇 聚效率达到最高。
作为本发明第二方面的灯具， 包括一外壳， 其特征在于， 在所述外壳内密排有若干大 功率 LED光源， 每一大功率 LED光源包括一 LED发光二极管和一对 LED发光二极管光 线进行汇聚的聚光器， 所述聚光器为凹面镜， 所述 LED发光二极管的发光部位， 位于所 述凹面镜的焦点处； 还包括一汇聚透镜， 所述汇聚透镜位于所述 LED发光二极管前方， 所述汇聚透镜的焦点位置位于 LED发光二极管的发光部位， 当然也可以根据最终光路配 光设计要求设置在 LED发光二极管的发光部位附近偏离处， 以满足不同灯具功能需要。 所述 LED发光二极管的发光部位， 位于所述凹面镜的焦点处， 有利于产生较高效率的准 直光束， 并由若干密排的该大功率 LED光源形成合适的面光源高密度准直光束以利于灯 具的配光功能设计。
所述汇聚透镜可以是具有汇聚作用的透镜， 如凸透镜， 优选是菲涅尔透镜。
在本发明的灯具中， 每一大功率 LED光源的凹面镜和汇聚透镜对光线的汇聚方向一 致， 即产生的光束的发射方向一致。 采用多个 LED发光二极管的方式可以有效提高光强， 采用上述技术方案， 可以有效提高发光的方向性。
在本发明的灯具中， 每一大功率 LED光源的凹面镜位于同一平面， 且紧密排布。 这 样可以使各个 LED发光二极管产生的光束排列紧密， 有利于使灯具整体出射光型的饱满 均匀、 没有布洒的刺眼亮点。
在本发明的灯具中， 所述若干个大功率 LED光源可以成蜂窝状排列， 也可以成矩形 阵列排列。
在本发明的灯具中， 每一大功率 LED光源的凹面镜相互连接。
每一大功率 LED光源的汇聚透镜可以单独设置在其相对于 LED光源的合适的位置， 也可以相互连接形成一整体的形式片设置在其对应于 LED光源的合适的位置。
在本发明的灯具中， 还包括一印刷线路板， 每一大功率 LED光源的 LED发光二极管 设置于所述印刷线路板上。 在所述印刷线路板上设置有一金属基散热板。 在本发明的灯具中， 大功率 LED光源的 LED发光二极管可以是单色的单芯片大功 率 LED发光二极管， 也可以是单色的多芯片大功率 LED发光二极管， 或者是多芯片可变 色大功率 LED发光二极管。
在本发明的灯具中， 在若干个大功率 LED光源的汇聚透镜前方设有一透明外罩， 或 者是具有对光线进行扩散配光功能的扩散透镜。 所述扩散透镜的镜面部分密布有扩散颗 粒。 所述扩散颗粒为具有扩散光线作用的透镜。 通过扩散透镜， 对各个 LED发光二极管 产生的光束进行一定的发散， 以满足灯具不同使用功能的要求。 若配用雾化或添加有光扩 散剂的柔光透镜则可以进一步使灯具的整体出射光型饱满、 柔和。
本发明的汇聚透镜采用凸透镜时， 由于凸透镜光学参数易于掌握， 且模具成本低， 所 以易于生产， 另外凸透镜表面平滑， 易于保持清洁。
本发明的汇聚透镜采用菲涅尔透镜时，由于菲涅尔透镜耗材少，有利于降低产品成本， 有利于减小产品的整体重量。
所述外壳后方设有一对所述 LED发光二极管起散热作用的散热后盖， 所述金属基散 热板与所述散热后盖压紧。
作为本发明第三发明的用途，该照明灯具可以应用于房间照明灯具或者应用于汽车照 明灯具或者道路照明灯具或者广告照明灯具或者探照灯具。
基于上述设计本发明尤其适用于单个 LED发光二极管功率大于 0.5W的大功率 LED 灯具中。
原有的大功率 LED灯具， 仅釆用全反射透镜作为聚光器， 特别经常采用单个全反射 树脂聚光（TIR)透镜作为聚光器。 全反射树脂聚光（TIR)透镜大都是由一块实体的透明 树脂构成。 要求整块透明树脂外表面高度光洁， 内部密度高度均匀， 且透光度高。 因此这 种全反射树脂聚光 （TIR) 透镜生产工艺复杂， 成本很高。 更重要的是单个全反射树脂聚 光（TIR)透镜只能制造小型的光源产品， 无法生产大口径的 LED光源产品。 在一定的功 率范围内， LED发光二极管的数量是会有限制的，而用该光源产品制作的灯具因其产生光 束较细， 当 LED发光二极管排布比较稀疏的情况下， 灯具会因此产生大量显著的亮点， 这种星星点点的刺眼亮点在一定程度上影响了大功率 LED灯具整体出光的饱满及柔和， 影响了灯具的发光效果和适用范围。
本发明上述技术方案中， 选用一凹面镜和一汇聚透镜， 代替原有的全反射透镜。 具有 如下技术效果. ·
首先凹面镜、汇聚透镜的生产工艺非常成熟。凹面镜是车灯、手电筒等常用的聚光器， 成本低， 且易于生产大口径的凹面镜。 作为汇聚透镜的凸透镜或菲涅尔透镜， 同样具有成 本低的特点， 而且易于生产大面积的凸透镜或菲涅尔透镜。通过采用大口径的凹面镜和大 面积的凸透镜或菲涅尔透镜， 可以有效增加光束的横截面积。 在 LED发光二极管排布比 较稀疏的情况下， 不会产生大量的亮点， 使大功率 LED灯具整体出射光型的饱满、 柔和， 提高了灯具的发光效果和适用范围。 附图说明
图 1为原有大功率 LED灯具产品结构示意图。
图 2为本发明灯具及所使用的大功率 LED光源的剖视结构示意图。
图 3为本发明灯具及所使用的大功率 LED光源的主视结构示意图。
图 4为本发明的一种具体应用产品结构示意图。
图 5为本发明的另一种具体应用产品结构示意图。
图 6为本发明的再一种具体应用产品结构示意图。 具体实施方式
为了使本发明实现的技术手段、 创作特征、 达成目的与功效易于明白了解， 下面结合 具体图示， 进一步阐述本发明。
参看图 2和图 3， 该灯具， 包括一外壳 2， 在外壳 2内密排有若干大功率 LED光源， 这些大功率 LED光源可以成蜂窝状排列， 也可以成矩形阵列排列 （如图 2所示）。
每一大功率 LED光源包括一 LED发光二极管 21 ， LED发光二极管 21上罩有对光 线进行汇聚的凹面镜 22。 LED发光二极管 21的发光部位，位于凹面镜 22的焦点处。 LED 发光二极管 21前方设有汇聚透镜 23，汇聚透镜 23的焦点位于 LED发光二极管 21的发光 部位。 有利于产生较为准直的光束， 适合需要较为准直的光束的场合。 汇聚透镜 23可以 是凸透镜， 也可以是菲涅尔透镜。
参照图 1， 原有的大功率 LED灯具， 大都仅采用全反射透镜作为聚光器， 特别经常采 用单个全反射树脂聚光（TIR)透镜 1作为聚光器。 全反射树脂聚光（TIR)透镜 1大都是 由一块实体的透明树脂构成。 要求整块透明树脂外表面高度光洁， 内部密度高度均匀， 且 透光度高。 因此这种全反射树脂聚光 （TIR) 透镜 1生产工艺复杂， 成本很高。 更重要的 是这种全反射树脂聚光 （TIR) 透镜 1只能制造小型的光源产品， 无法生产大口径的 LED 光源产品。 因此只能产生光线集中的较细的光束。在一定的功率范围内， LED发光二极管 的数量是有限的， 为了保持灯具的必要形状和尺寸， 当 LED发光二极管排布的比较稀疏 时， 其会产生大量的亮点， 这种星星点点的刺眼亮点在一定程度上影响了大功率 LED灯 具整体出射光型的饱满及柔和， 影响了灯具的发光效果和适用范围。
参照图 2， 本发明上述技术方案中， 选用一凹面镜 22和一汇聚透镜 23 , 代替原有的 全反射树脂聚光 （TIR) 透镜 1。 具有如下技术效果：
首先凹面镜 22、 汇聚透镜 23的生产工艺非常成熟。 凹面镜是车灯、 手电筒等常用的 聚光器， 成本低， 且易于生产大口径的凹面镜 22。 作为汇聚透镜 23的凸透镜或菲涅尔透 镜， 同样具有成本低的特点， 而且易于生产大面积的凸透镜或菲涅尔透镜。 通过采用大口 径的凹面镜 22和大面积的凸透镜或菲涅尔透镜， 可以有效增加光束的横截面积。 在 LED 发光二极管 21排布稀疏的情况下， 不会产生大量的亮点， 使大功率 LED灯具整体出射光 型的饱满、 柔和， 提高了灯具的发光效果和适用范围。
本发明的汇聚透镜 23采用凸透镜时， 由于凸透镜光学参数易于掌握， 且模具成本低， 所以易于生产， 另外凸透镜表面平滑， 易于保持清洁。 本发明的汇聚透镜 23采用菲涅尔 透镜时， 由于菲涅尔透镜耗材少， 有利于降低产品成本， 有利于减小产品的整体重量。
在该照明灯具中， 每一大功率 LED光源的凹面镜 22和汇聚透镜 23对光线，的汇聚方 向一致， 即产生的光束的发射方向一致。 采用多个 LED发光二极管的方式可以有效提高 光强， 采用上述技术方案， 可以有效提高发光的方向性。
每一大功率 LED光源的凹面镜 22位于同一平面， 且紧密排布相互连接。 这样可以使 各个 LED发光二极管产生的光束排列紧密， 有利于使整体出射光型的饱满、 柔和。 每一 与大功率 LED光源所对应的汇聚透镜 23也可相互连接形成一整片以利镜片的安装。
每一大功率 LED光源的 LED发光二极管 21设置在一印刷线路板 26， 在印刷线路板 26上设置有一金属基散热板，在外壳 2后方设有一对 LED发光二极管 21起散热作用的散 热后盖 25， 金属基散热板与散热后盖 25压紧， 以便于 LED发光二极管 21散热。
大功率 LED光源的 LED发光二极管可以是单色的单芯片大功率 LED发光二极管， 也可以是多芯片大功率 LED发光二极管， 或者是多芯片可变色大功率 LED发光二极管。
参照图 2和图 3， 在若干个大功率 LED光源的汇聚透镜 22前方设有对光线进行扩散 的扩散透镜 24。 扩散透镜 24的镜面部分密布有扩散颗粒。 扩散颗粒为凸透镜。 扩散透镜 24对各个 LED发光二极管经汇聚产生的准直光束进行一定的定向发散， 以满足灯具不同 功能的配光要求。若配用雾化或添加有光扩散剂的柔光透镜则可以进一步使灯具的整体出 射光型饱满、 柔和。
该灯具可以应用于工作照明灯具， 如图 4所示的工作灯 31。 或者应用于汽车照明灯 具， 如图 5所示的汽车内饰灯 32。 或者房间照明灯具， 如图 6所示的台灯。 本发明的灯 具可以用来制造手电筒。 以上显示和描述了本发明的基本原理、 主要特征和本发明的优点。本行业的技术人员 应该了解， 本发明不受上述实施例的限制， 上述实施例和说明书中描述的只是说明本发明 的原理， 在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进， 这些变化和 改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等同 物界定。

Claims

权利要求
1. 大功率 LED光源， 包括一 LED犮光二极管和一对 LED发光二极管光线进行汇聚的聚 光器， 其特征在于， 所述聚光器为凹面镜， 所述 LED发光二极管的发光部位， 位于所 述凹面镜的焦点处；还包括一汇聚透镜，所述汇聚透镜位于所述 LED发光二极管前方， 所述汇聚透镜的焦点位于 LED发光二极管的发光部位。
2. 权利要求 1所述的大功率 LED光源， 其特征在于， 所述凹面镜的焦点及所述汇聚透镜 的焦点位置也可以根据需要设置在 LED发光二极管的发光部位偏离处。
3. 根据权利要求 1 所述的大功率 LED光源， 其特征在于， 所述汇聚透镜是菲涅尔透镜， 也可以是其他具有汇聚作用的凸透镜。
4. 一种灯具， 包括一外壳， 其特征在于， 在所述外壳内密排有若干大功率 LED光源， 每 一大功率 LED光源包括一 LED发光二极管和一对 LED发光二极管光线进行汇聚的聚 光器， 所述聚光器为凹面镜， 所述 LED发光二极管的发光部位， 位于所述凹面镜的焦 点处； 还包括一汇聚透镜， 所述汇聚透镜位于所述 LED发光二极管前方， 所述汇聚透 镜的焦点设置在 LED发光二极管的发光部位， 也可以根据需要设置在 LED发光二极 管的发光部位偏离处。
5. 根据权利要求 4 所述的灯具， 其特征在于， 所述汇聚透镜是菲涅尔透镜， 也可以是其 他具有汇聚作用的凸透镜。
6. 根据权利要求 4所述的灯具， 其特征在于， 每一大功率 LED光源的凹面镜和汇聚透镜 对光线的汇聚方向一致， 即产生的光束的发射方向一致。
7. 根据权利要求 4所述的灯具， 其特征在于， 每一大功率 LED光源的凹面镜位于同一平 面， 且紧密排布。
8. 根据权利要求 4所述的灯具，其特征在于，所述若干个大功率 LED光源成蜂窝状排列。
9. 根据权利要求 4所述的灯具， 其特征在于， 所述若干个大功率 LED光源成矩形阵列排 列。
10.根据权利要求 4所述的灯具， 其特征在于， 每一大功率 LED光源的汇聚透镜可以单独 设置在其相对于 LED光源的合适的位置， 也可以相互连接形成一整体的形式设置在 其对应于 LED光源的合适的位置。
11.根据权利要求 7所述的灯具， 其特征在于， 每一大功率 LED光源的凹面镜相互连接。
12.根据权利要求 4所述的灯具， 其特征在于， 还包括一印刷线路板， 每一大功率 LED光 源的 LED发光二极管设置于所述印刷线路板上。
13.根据权利要求 12所述的灯具， 其特征在于， 在所述印刷线路板上设置有一金属基散热 板。
14.根据权利要求 13所述的灯具， 其特征在于， 所述外壳后方设有一对所述 LED发光二 极管起散热作用的散热后盖， 所述金属基散热板与所述散热后盖压紧。
15.根据权利要求 4所述的灯具， 其特征在于， 所述大功率 LED光源的 LED发光二极管 是单色的单芯片大功率 LED发光二极管。
16.根据权利要求 4所述的灯具， 其特征在于， 所述大功率 LED光源的 LED发光二极管 也可以是单色的多芯片大功率 LED发光二极管。
17.根据权利要求 4所述的灯具， 其特征在于， 所述大功率 LED光源的 LED发光二极管 也可以是多芯片可变色大功率 LED发光二极管。
18.根据权利要求 4所述的灯具， 其特征在于， 在若干个大功率 LED光源的汇聚透镜前方 设有一透明外罩。
19.根据权利要求 4所述的灯具， 其特征在于， 在若干个大功率 LED光源的汇聚透镜前方 设有一对光线进行扩散的扩散透镜。
20.根据权利要求 19所述的灯具， 其特征在于， 所述扩散透镜的镜面部分密布有扩散颗粒 或扩散凹坑。
21.根据权利要求 20所述的灯具， 其特征在于， 所述扩散颗粒为具有扩散光线作用的凸透 镜。
22.根据权利要求 20所述的灯具， 其特征在于， 所述扩散凹坑为具有扩散光线作用的凹透 镜。
23.根据权利要求 19所述的灯具， 其特征在于， 所述扩散透镜也可以是雾化或添加有光扩 散剂的柔光透镜。
24.一种如权利要求 4所述的灯具可以用来制备工作照明灯具。
25.一种如权利要求 4所述的灯具可以用来制备房间照明灯具。
26.一种如权利要求 4所述的灯具可以用来制备汽车照明灯具。
27.一种如权利要求 4所述的灯具可以用来制备道路照明灯具。
28.一种如权利要求 4所述的灯具可以用来制备广告照明灯具。
29.一种如权利要求 4所述的灯具可以用来制备工程照明灯具。
30.一种如权利要求 4所述的灯具可以用来制备手电筒。
PCT/CN2009/001520 2009-01-22 2009-12-21 Led光源及使用该光源的led灯具 Ceased WO2010083637A1 (zh)

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