CN100555691C - Improve the encapsulating structure of luminous efficiency of power LED - Google Patents
Improve the encapsulating structure of luminous efficiency of power LED Download PDFInfo
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- CN100555691C CN100555691C CNB200710132090XA CN200710132090A CN100555691C CN 100555691 C CN100555691 C CN 100555691C CN B200710132090X A CNB200710132090X A CN B200710132090XA CN 200710132090 A CN200710132090 A CN 200710132090A CN 100555691 C CN100555691 C CN 100555691C
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Abstract
Improve the encapsulating structure of semiconductor light-emitting-diode light extraction efficiency, the upper surface of metallic heat radiating plate (1) is provided with a cannelure, in this cannelure, be provided with the wiring board (2) of an annular, centre at the wiring board (2) of annular is provided with a reflector or opening lens (3), centre at the upper surface of metallic heat radiating plate (1) is provided with a luminescence chip (5), the two ends of contact conductor (4) are sending and receiving optical chips (5) and annular wiring board (2) respectively, is filled with transparent adhesive tape (7) at reflector or opening lens (3).Because fluorescent material directly is not coated in the luminescence chip surface, has on the lens of certain distance but be coated in luminescence chip, the light that makes reflections from phosphor particles return is reflected away once more, improves light extraction efficiency.
Description
Technical field
The present invention relates to improve the encapsulating structure of semiconductor light-emitting-diode luminous efficiency, especially improve power type light-emitting diode because of using closed lens and the fluorescent powder coated encapsulating structure that brings luminous efficiency to reduce.
Background technology
Semiconductor light-emitting-diode is a kind of energy-saving and environmental protection, long-life solid light source, and is therefore very active always to the research of semiconductor led technology in recent ten years, wishes can replace in the future fluorescent lamp, the incandescent lamp that generally uses at present.The many major companies in the whole world drop into the luminous efficiency that substantial contribution is devoted to improve large power semiconductor LED, comprise the encapsulation technology of design, preparation technology and the device of chip.For large-power light-emitting diodes, it need use lens to regulate luminous angle and use fluorescent material to regulate the color of light.But because light passes lens and can cause certain light loss, and the fluorescent material that is coated in chip surface can reflect away a part of light, cause luminous efficiency to descend, the light extraction efficiency that therefore improves light-emitting diode is a key of large-power light-emitting diodes encapsulation technology.Encapsulating structure commonly used now is the surface that fluorescent material directly is coated in luminescence chip, and then with lens chip is covered, and pours into transparent adhesive tape in the lens.The shortcoming of this structure is will and understand some light and be returned by reflections from phosphor particles through lens from the light that chip sends, and makes light lose a part in transmission course.Therefore reducing the loss of light in transmission course just becomes extremely important for the light extraction efficiency that improves light-emitting diode.
Summary of the invention
Technical problem: in order to improve the light extraction efficiency of large-power light-emitting diodes, the invention provides the encapsulating structure that improves luminous efficiency of power LED, can improve in the common encapsulating structure owing to using closed lens and fluorescent material directly being coated in the loss of light in transmission course that bring on the luminescence chip surface, the raising light extraction efficiency.
Technical scheme: the solution of the present invention is: the upper surface of metallic heat radiating plate is provided with a cannelure, in this cannelure, be provided with the wiring board of an annular, centre at the wiring board of annular is provided with a reflector or opening lens, centre at the upper surface of metallic heat radiating plate is provided with a luminescence chip, the two ends of contact conductor are sending and receiving optical chip and annular wiring board respectively, is filled with transparent adhesive tape at reflector or opening lens.
Be provided with the lens of coating fluorescent powder at the opening part of reflector or opening lens.Reflector or opening lens inwall plating reflectance coating, its upper and lower side opening shape is done circular or square, and opening size can be greater than or less than its bottom size, and also size is the same up and down, and the side can be plane or curved surface.Fluorescent powder coated upper surface or lower surface at lens, also can the two sides coating fluorescent powders all, the upper and lower surface of lens can be made sphere, taper, back taper or other shapes according to different situations.
Adopt the lens of open type or reflector to reduce because of light and pass the loss that lens bring, and fluorescent material directly is not coated in chip surface, with luminescence chip the lens surface of certain distance is arranged but be coated in one, a part of light of being returned by reflections from phosphor particles will be reflected once more again and be utilized like this, just can reduce the light loss that brings owing to reflections from phosphor particles.Can improve the light extraction efficiency of light-emitting diode in this way.
Beneficial effect: the invention has the beneficial effects as follows and reduce the loss of light in transmission course that luminescence chip sends as much as possible, improve light extraction efficiency.The reflector or the lens that the lens that seal are changed into opening pass the loss that lens bring with minimizing because of light, with luminescence chip the lens surface of certain distance is arranged at one with fluorescent powder coated, the light that reflections from phosphor particles are returned is reflected away once more, improves light extraction efficiency;
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the generalized section of basic structure of the present invention.
Fig. 2 is the generalized section that the present invention is provided with the lens 8 of coating fluorescent powder.
Have among the figure: the lens 8 of metallic heat radiating plate 1, wiring board 2, reflector or opening lens 3, contact conductor 4, luminescence chip 5, welding material 6, transparent adhesive tape 7, coating fluorescent powder, fluorescent material 9.
Embodiment
In Fig. 1, luminescence chip 5 is fixed on by welding material 6 on the centered cylinder of metallic heat radiating plate 1 of electroplate.Wiring board 2 is to be used for the both positive and negative polarity of luminescence chip 5 is drawn by contact conductor 4, so that connect outside lead in use.Wiring board 2 usefulness binding agents are fixed on the metallic heat radiating plate 1.Reflector or opening lens 3 are fixed on the wiring board 2.Reflector or opening lens 3 can be made of transparent material or opaque material.Different with lens commonly used is that its upper end is not sealed, but an opening passes the loss that lens bring with minimizing because of light.The opening size of this upper end can be bigger than the lower end of reflector, also can be little, and its side can be the plane, also can be curved surface.Reflector or opening lens 3 inside charge into transparent adhesive tape 7.
In the embodiment of Fig. 2, lens 8 on reflector 3, have been added.Lens 8 have certain distance with luminescence chip.Surface-coated at lens 8 has fluorescent material 9.Can be according to actual conditions, different shape can be made in the upper and lower surfaces of lens 8, and these shapes will help reflecting from the light that reflections from phosphor particles the are returned cup that is reflected again, and improve light extraction efficiency.
In Fig. 1, the material of reflector or opening lens 3 can be metal, pottery, plastics and other transparent and non-transparent material.Its inwall can plate reflectance coating.Its upper and lower side opening shape can be done circular or square.Opening can be greater than or less than its bottom, and also size is the same up and down.The side can be plane or curved surface.Purpose is to reduce the light loss that brings because of lens.The fixing of reflector or opening lens 3 can be used binding agent, screw or other modes.Charge into transparent adhesive tape 7 in reflector or the opening lens 3.
In Fig. 2, fluorescent material 9 is coated in the upper surface or the lower surface of lens 8, also can the two sides coating fluorescent powders all.The upper and lower surface of lens 8 can be made sphere, taper, back taper or other shapes according to different situations.Purpose is that the light that allows the fluorescent material scattering return can as often as possible be reflected away once more, improves light extraction efficiency.Lens 8 can be fixed in the top or reflector or opening lens 3 of reflector or opening lens 3, keep certain distance with luminescence chip 5.Be full of transparent adhesive tape 7 between reflector or opening lens 3 and the lens 8.Transparent adhesive tape 7 is flexible silica gel or epoxy resin.
Claims (3)
1, a kind of encapsulating structure that improves the semiconductor light-emitting-diode light extraction efficiency, it is characterized in that: the upper surface of metallic heat radiating plate (1) is provided with a cannelure, in this cannelure, be provided with the wiring board (2) of an annular, centre at the wiring board (2) of annular is provided with a reflector or opening lens (3), centre at the upper surface of metallic heat radiating plate (1) is provided with a luminescence chip (5), the two ends of contact conductor (4) are sending and receiving optical chips (5) and annular wiring board (2) respectively, is filled with transparent adhesive tape (7) at reflector or opening lens (3); Be provided with the lens (8) of coating fluorescent powder at the opening part of reflector or opening lens (3).
2, the encapsulating structure of raising semiconductor light-emitting-diode light extraction efficiency according to claim 1, it is characterized in that reflector or opening lens (3) inwall plating reflectance coating, its upper and lower side opening shape is done circular or square, opening size can be greater than or less than its bottom size, also size is the same up and down, and the side can be plane or curved surface.
3, the encapsulating structure of raising semiconductor light-emitting-diode light extraction efficiency according to claim 1, it is characterized in that fluorescent powder coated upper surface or lower surface at lens, also can the two sides coating fluorescent powders all, the upper and lower surface of lens can be made sphere, taper, back taper or other shapes according to different situations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710132090XA CN100555691C (en) | 2007-09-11 | 2007-09-11 | Improve the encapsulating structure of luminous efficiency of power LED |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710132090XA CN100555691C (en) | 2007-09-11 | 2007-09-11 | Improve the encapsulating structure of luminous efficiency of power LED |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101132041A CN101132041A (en) | 2008-02-27 |
| CN100555691C true CN100555691C (en) | 2009-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710132090XA Expired - Fee Related CN100555691C (en) | 2007-09-11 | 2007-09-11 | Improve the encapsulating structure of luminous efficiency of power LED |
Country Status (1)
| Country | Link |
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| CN (1) | CN100555691C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2294635A1 (en) * | 2008-07-01 | 2011-03-16 | Koninklijke Philips Electronics N.V. | Close proximity collimator for led |
| CN101794768B (en) * | 2009-02-02 | 2011-10-26 | 扬明光学股份有限公司 | Light emitting diode package and projecting device |
| CN101958387A (en) * | 2010-07-16 | 2011-01-26 | 福建中科万邦光电股份有限公司 | Novel LED light resource module packaging structure |
| CN201758139U (en) * | 2010-07-16 | 2011-03-09 | 福建中科万邦光电股份有限公司 | Novel LED light source module packaging structure |
| CN102444859A (en) * | 2010-09-30 | 2012-05-09 | 无锡华兆泓光电科技有限公司 | Light distribution lens for LED (light emitting diode) multi-core light source street lamp |
| CN102054913B (en) * | 2010-11-09 | 2013-07-10 | 映瑞光电科技(上海)有限公司 | LED as well as manufacturing method and light-emitting device thereof |
| CN102054914B (en) | 2010-11-09 | 2013-09-04 | 映瑞光电科技(上海)有限公司 | Light emitting diode and manufacturing method thereof and light emitting device |
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2007
- 2007-09-11 CN CNB200710132090XA patent/CN100555691C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101132041A (en) | 2008-02-27 |
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| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20120911 |