CN102606900B - Color-temperature-adjustable white light emitting diode (LED) light source - Google Patents
Color-temperature-adjustable white light emitting diode (LED) light source Download PDFInfo
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- CN102606900B CN102606900B CN201110027732.6A CN201110027732A CN102606900B CN 102606900 B CN102606900 B CN 102606900B CN 201110027732 A CN201110027732 A CN 201110027732A CN 102606900 B CN102606900 B CN 102606900B
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Abstract
The invention belongs to the photoelectronic field, which discloses a color-temperature-adjustable white light emitting diode (LED) light source. The white LED light source comprises a round plate-like substrate, two metal connection layers arranged in an intermediate region of the substrate surface at an interval, a white LED chip and a single-color LED chip arranged on each metal connection layer, and a reflector having an inclined reflection surface and arranged at an edge of the substrate. The white LED light source further comprises a convex lens having a flat bottom. The flat bottom forms a vacuum light source chamber with the reflector. The light source chamber is used for accommodating the white LED chips and the single-color LED chips. The inventive color-temperature-adjustable white light emitting diode (LED) light source overcomes the problems of nonuniform color temperature and color temperature shift; meanwhile, the invention reduces heat resistance of light emitting surfaces of the LED chips to ambient environment, so as to facilitate dissipation of heat generated by the LED chips from the LED chips, thereby prolonging the service life of the light source.
Description
Technical field
The present invention relates to a kind of LED light source structure, relate in particular to a kind of adjustable white LED light source of high reliability, high light-emitting rate and colour temperature for throwing light on.
Background technology
Existing LED white light source sends blue light or purple light with blueness or ultraviolet chip conventionally, on chip, apply again corresponding phosphor powder layer, the light that the blue light that chip sends or purple light excited phosphor powder layer send mixes with remaining blue light or purple light, can make the white light source of different-colour and colour rendering index, but the colour temperature and development index of this white light source is can not be freely regulated.On the other hand, white light emitting diode that existing colour temperature is adjustable adopt blue chip and above red light chips coating fluorescent powder layer prepare, owing to being subject to some powder technical limitations up till now to cause light source space color temperature distribution inhomogeneous, and optical attenuation is serious and colour temperature drift phenomenon is serious because glue mixed fluorescent powder often causes in light source use procedure.In addition, the coated blue chip of phosphor powder layer and red light chips not only cause the use waste of fluorescent material, and cause the heat that chip produces to be difficult for distributing from above in time.Finally, existing LED white light source by heat-conducting glue be fixed on heat sink on, the thermal resistance of heat-conducting glue own is large and easily aging, causes the LED white light source heat that in use chip produces not distribute in time, thereby causes in use light decay and colour temperature drift of LED light source serious.
Summary of the invention
Based on the problems referred to above, the object of the invention is to propose a kind ofly provides colour temperature simple in structure, that cost is low, the efficiency of light energy utilization is high, light efficiency is high adjustable white LED light source.
The white LED light source that a kind of colour temperature is adjustable, comprise circular panel-shaped base body, a surface at matrix arranges a metal connecting layer, be arranged at intervals with two metal connecting layer in the central region of described matrix, in each metal connecting layer, be respectively equipped with White-light LED chip and monochromatic light LED chip, be provided with the reflector of ramped shaped reflecting surface in the edge of described matrix, this white LED light source also comprises the convex lens with a planar base surface, and the planar base surface of these convex lens and described reflector form a vacuum light-source chamber, this light-source chamber is used for installing White-light LED chip and monochromatic light LED chip.
The white LED light source that described colour temperature is adjustable, wherein, on described matrix and be placed on the reflecting surface of vacuum light-source chamber part and described reflector one deck reflector layer is set respectively.
The white LED light source that described colour temperature is adjustable, wherein, described metal connecting layer is arranged on the center of described light-source chamber.
The white LED light source that described colour temperature is adjustable, wherein, the profile structure of described convex lens is spherical crown shape.
The white LED light source that described colour temperature is adjustable, wherein, the longitudinal cross-section of described convex lens is the bowl-shape of back-off.
The white LED light source that described colour temperature is adjustable, wherein, the spacing distance of described metal connecting layer is 80～200 millimeters.
The white LED light source that described colour temperature is adjustable, wherein, described convex lens are glass lens or quartz lens.
The white LED light source that described colour temperature is adjustable, wherein, the connected mode between described White-light LED chip and monochromatic light LED chip is for being connected in series.
The white LED light source that described colour temperature is adjustable, wherein, described matrix is pottery or metal heat sink.
The white LED light source that colour temperature provided by the invention is adjustable, adopts White-light LED chip, with respect to the existing mixed layer at institute's compositing chip surface coating fluorescent powder and glue, has the following advantages:
1, the problems such as the inhomogeneous and colour temperature drift of light source space colour temperature have been overcome;
2, reduce the LED chip light-emitting area thermal resistance to surrounding environment, distribute above chip thereby be conducive to the heat that chip produces, reduced the junction temperature of LED chip, thereby improve the reliability of light source use and extended service life of light source.
Brief description of the drawings
Fig. 1 is the structural representation of the adjustable white LED light source of a kind of colour temperature in embodiment 1;
Fig. 2 is the structural representation of the adjustable white LED light source of a kind of colour temperature in embodiment 2;
Fig. 3 is the matrix surface structural representation of the adjustable white LED light source of colour temperature of the present invention.
Specific embodiment
The adjustable white LED light source of a kind of colour temperature provided by the invention, comprises circular panel-shaped base body, and this matrix can be ceramic material or metal heat sink matrix; The laminating of surperficial central region interval of matrix be provided with two for weld LED chip (as, White-light LED chip and monochromatic light LED chip) metal connecting layer, and metal connecting layer spacing distance is 80～200 microns, in each metal connecting layer, be welded with respectively a White-light LED chip and a monochromatic light LED chip; White-light LED chip and monochromatic light LED chip adopt connected in series or in parallel; Be provided with the reflector of ramped shaped reflecting surface in the edge of matrix, this white LED light source also comprises the convex lens with a planar base surface, and the planar base surface of these convex lens and described reflector form a vacuum light-source chamber, this light-source chamber is used for installing White-light LED chip and monochromatic light LED chip.
For increasing reflecting effect, on matrix and be placed on the reflecting surface of vacuum light-source chamber part and reflector, one deck reflector layer is set respectively.
Above-mentioned white LED light source, preferable alloy articulamentum is arranged on matrix and is positioned at the center of light-source chamber.
Above-mentioned white LED light source, in order to improve light efficiency, convex lens adopt profile structure to be the convex lens of spherical crown shape, or longitudinal cross-section is the bowl-shape convex lens of back-off, and convex lens are selected quartz lens or glass lens.
The white LED light source that colour temperature provided by the invention is adjustable, its LED chip employing White-light LED chip (as, cold white chip or positive white chip) and monochromatic light LED chip (as, red light chips), by regulating the luminous strength ratio of White-light LED chip and monochromatic light LED chip, can realize high brightness more, more high reliability, long-life and there is no the super high power warm white source of colour temperature drift more.Meanwhile, this white LED light source has solved the technical barriers such as the warm white source colour temperature drift of current technology, low reliability more effectively
This white LED light source can, for street lamp, substitute current existing high-pressure mercury lamp, also can be used for room lighting, saves energy environmental protection simultaneously.
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in further detail.
Embodiment 1
As shown in figs. 1 and 3, the white LED light source that a kind of colour temperature is adjustable, adopt circular dull and stereotyped ceramic matrix 1, be provided with two metal connecting layer 2 every 200 microns of laminatings the upper surface middle part of matrix 1 is interregional, in each metal connecting layer 2, being welded with respectively a White-light LED chip 5 and monochromatic light LED chip 4, two LEDs chips adopts and is connected in series mode and links together; Be connected with an annular reflex body 3 in the edge of matrix 1, the reflecting surface 32 of this reflector 3 is smooth tapered plane or oblique cambered surface; White LED light source also comprises spherical crown shape convex lens 6, these convex lens 6 are the quartz lens of 5 millimeters thick, and its planar base surface 61 edges are fixed on the ladder boss 31 on reflector 3, between described lens 61, reflector 3 and matrix 1, form a vacuum light-source chamber 7,4 of White-light LED chip 5 and monochromatic light LED chips install in this vacuum light-source chamber 7.
In order to improve light efficiency, the surface that is positioned at the part 21 of vacuum light-source chamber 7 at the reflecting surface 32 of reflector 3 and articulamentum 2 arranges one deck reflector layer.
Embodiment 2
As shown in Figures 2 and 3, the present embodiment 2 is with the difference of embodiment 1:
The heat sink matrix of matrix 1 circular flat sheetmetal of this white LED light source, convex lens 6 are center thickness 8 millimeters thick glass lens, and the longitudinal cross-section of these convex lens 6 is the bowl structure of a back-off; Two metal connecting layer 2 are spaced apart 80 microns, and White-light LED chip 5 and monochromatic light LED chip 4 adopts and be connected in parallel.White LED light source in this embodiment, adopts the high-power 1W or the 5WLED chip that once encapsulate, just can directly apply to street lamp without secondary light-distribution, thereby has effectively improved the light extraction efficiency of whole small cup lamp.
Should be understood that, the above-mentioned statement for preferred embodiment of the present invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, and scope of patent protection of the present invention should be as the criterion with claims.
Claims (9)
1. the white LED light source that colour temperature is adjustable, it is characterized in that, this white LED light source comprises circular panel-shaped base body, be arranged at intervals with two metal connecting layer in the central region of described matrix surface, described in each, in metal connecting layer, be respectively equipped with White-light LED chip and monochromatic light LED chip, be provided with the reflector of ramped shaped reflecting surface in the edge of described matrix, this white LED light source also comprises the convex lens with a planar base surface, and the planar base surface of these convex lens and described reflector form a vacuum light-source chamber, this light-source chamber is used for installing White-light LED chip and monochromatic light LED chip, described planar base surface edge is fixed on the ladder boss on described reflector, on described matrix and be placed on the reflecting surface of vacuum light-source chamber part and described reflector one deck reflector layer is set respectively.
2. the adjustable white LED light source of colour temperature according to claim 1, is characterized in that, described metal connecting layer is arranged on the center of described light-source chamber.
3. the adjustable white LED light source of colour temperature according to claim 1, is characterized in that, the profile structure of described convex lens is spherical crown shape.
4. the adjustable white LED light source of colour temperature according to claim 1, is characterized in that, the longitudinal cross-section of described convex lens is the bowl-shape of back-off.
5. the adjustable white LED light source of colour temperature according to claim 1, is characterized in that, the spacing distance of described metal connecting layer is 80～200 millimeters.
6. the adjustable white LED light source of colour temperature according to claim 1, is characterized in that, described convex lens are glass lens or quartz lens.
7. the adjustable white LED light source of colour temperature according to claim 1, is characterized in that, the connected mode between described White-light LED chip and monochromatic light LED chip is for being connected in series.
8. the adjustable white LED light source of colour temperature according to claim 1, is characterized in that, the connected mode between described White-light LED chip and monochromatic light LED chip is for being connected in parallel.
9. the adjustable white LED light source of colour temperature according to claim 1, is characterized in that, described matrix is pottery or metal heat sink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110027732.6A CN102606900B (en) | 2011-01-25 | 2011-01-25 | Color-temperature-adjustable white light emitting diode (LED) light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110027732.6A CN102606900B (en) | 2011-01-25 | 2011-01-25 | Color-temperature-adjustable white light emitting diode (LED) light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102606900A CN102606900A (en) | 2012-07-25 |
| CN102606900B true CN102606900B (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110027732.6A Expired - Fee Related CN102606900B (en) | 2011-01-25 | 2011-01-25 | Color-temperature-adjustable white light emitting diode (LED) light source |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107301027A (en) | 2017-06-19 | 2017-10-27 | 广东欧珀移动通信有限公司 | Screen color temp adjusting method, device and its equipment |
| CZ309539B6 (en) * | 2020-12-17 | 2023-03-29 | Hynek Medřický | White light fixture for daily activities, regenerating the retina of the eye in real time, which is damaged by blue light |
Citations (4)
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|---|---|---|---|---|
| CN101496186A (en) * | 2006-07-31 | 2009-07-29 | 3M创新有限公司 | LED source with hollow collection lens |
| CN201327844Y (en) * | 2008-12-02 | 2009-10-14 | 苏州久腾光电科技有限公司 | Package structure of surface-mount LED module |
| CN201382289Y (en) * | 2009-05-06 | 2010-01-13 | 南京汉德森科技股份有限公司 | Light source structure of mixed light formed warm white LED source |
| CN201487612U (en) * | 2009-08-18 | 2010-05-26 | 深圳市众明半导体照明有限公司 | Warm white LED light source with high-brightness and high color rendering index |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007214522A (en) * | 2006-02-10 | 2007-08-23 | Intekkusu Kk | Light source device and illuminator using same |
| US7910938B2 (en) * | 2006-09-01 | 2011-03-22 | Cree, Inc. | Encapsulant profile for light emitting diodes |
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2011
- 2011-01-25 CN CN201110027732.6A patent/CN102606900B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496186A (en) * | 2006-07-31 | 2009-07-29 | 3M创新有限公司 | LED source with hollow collection lens |
| CN201327844Y (en) * | 2008-12-02 | 2009-10-14 | 苏州久腾光电科技有限公司 | Package structure of surface-mount LED module |
| CN201382289Y (en) * | 2009-05-06 | 2010-01-13 | 南京汉德森科技股份有限公司 | Light source structure of mixed light formed warm white LED source |
| CN201487612U (en) * | 2009-08-18 | 2010-05-26 | 深圳市众明半导体照明有限公司 | Warm white LED light source with high-brightness and high color rendering index |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-214522A 2007.08.23 |
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| CN102606900A (en) | 2012-07-25 |
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Granted publication date: 20140723 Termination date: 20190125 |