CN102644855A - White-light LED (Light-Emitting Diode) light source - Google Patents
White-light LED (Light-Emitting Diode) light source Download PDFInfo
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- CN102644855A CN102644855A CN2011100410093A CN201110041009A CN102644855A CN 102644855 A CN102644855 A CN 102644855A CN 2011100410093 A CN2011100410093 A CN 2011100410093A CN 201110041009 A CN201110041009 A CN 201110041009A CN 102644855 A CN102644855 A CN 102644855A
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Abstract
The invention belongs to the field of photoelectrons and discloses a white-light LED (Light-Emitting Diode) light source. The white-light LED light source comprises a circular base body, wherein a circular groove is arranged on the base body and a counter bore is arranged in the central region of the bottom of the groove; the counter bore is internally sleeved with a metal heat sink; an LED chip is fixedly arranged on the surface of the metal heat sink; a convex lens which is adaptively sealed is fixedly arranged at an opening part of the groove and a light source cavity is formed on a groove part below the convex lens; and a fluorescent powder filler is filled into the light source cavity. The white-light LED light source disclosed by the invention solves the problems that color temperatures of a light source space are not uniform, the color temperatures drift and the like.
Description
Technical field
The present invention relates to a kind of led light source, relate in particular to a kind of white LED light source that is used to throw light on.
Background technology
Existing White-light LED illumination technology based on the LED chip cooperates the fluorescent material mode simple with the blue led chip, and Application Research is the most extensive.The core of lighting LED white light technology is the coated technique of fluorescent material; The controllability of the thickness of fluorescent coating and uniformity directly have influence on the whole light extraction efficiency of brightness, colourity uniformity and light source of LED white light, even can have influence on light source colour temperature stability and dependability in use.Existing fluorescent powder coated technology is that glue (epoxy resin, silica gel or silicones etc.) and luminescent material amalgam are filled to light-source chamber; Fluorescent material disperses to be difficult to evenly in glue and fluorescent material amalgam, and has bubble in the amalgam of glue and fluorescent material inevitably.Afterwards, drip on the chip of solid brilliant bonding wire baking typing in half an hour through the amalgam of manual perhaps automatically dropping glue machine with an amount of fluorescent material and glue.This technology mid point glue amount is restive; Make that the photochromic difference of making in batch of LED is bigger; And fluorescent material precipitates easily; Apply inhomogeneously, cause fluorescent material poor, thereby cause single light source whole luminous intensity and the skewness of colour temperature on all directions of space in the chip surface Uniformity of Distribution.
Summary of the invention
Based on the problems referred to above, the objective of the invention is to propose a kind ofly to provide simple in structure, cost is low, the efficiency of light energy utilization is high, color temperature distribution uniform white light led light source.
A kind of white LED light source comprises circular base, on said matrix, is provided with circular groove; Be provided with counter sink in said bottom portion of groove central area; The embedded metal heat sink that is with of said counter sink is set with led chip on said metal heat sink surface, is provided with convex lens in the adaptive sealing and fixing of the opening part of said groove; And make the groove part of said convex lens below form a light-source chamber, and in said light-source chamber, fill the fluorescent material filler.
Described white LED light source, wherein, the sidewall of said light-source chamber is the vertical configuration sidewall.
Described white LED light source, wherein, the sidewall of said light-source chamber is the ramped shaped sidewall.
Described white LED light source wherein, is provided with the reflecting layer on said ramped shaped sidewall.
Described white LED light source wherein, is provided with a phosphor powder layer in said convex lens bottom surface.
Described white LED light source, wherein, the thickness of said phosphor powder layer is 0.5-1.5mm.
Described white LED light source, wherein, the material of said phosphor powder layer activates calcium magnesium chloro-silicate fluorescent material for the divalent europium of yttrium aluminium garnet fluorescent powder, the germanate garnet system that glows or the green light of jaundice light.
Described white LED light source, wherein, the profile of said convex lens structure is the bowl-shape of spherical crown shape or back-off.
Described white LED light source, wherein, said fluorescent material filler activates the amalgam of calcium magnesium chloro-silicate fluorescent material and silica gel or epoxy resin for the divalent europium of yttrium aluminium garnet fluorescent powder, the germanate garnet system that glows or the green light of jaundice light.
Described white LED light source, wherein, said convex lens be in quartz lens, silica-gel lens or the glass lens any.
White LED light source provided by the invention; Overcome in the conventional point powder craft phosphor powder layer thickness technical barrier such as be difficult to that control and fluorescent material precipitate easily effectively; Also overcome simultaneously technical scheme complex procedures such as existing glass pottery screen, fluorescence membrane and fluorescent material magnetron sputtering deposition, cost is high, production efficiency is low and produce the product homogeneity in batches and be difficult to difficult problems such as control.Led chip is fixed in the cavity of support of a particular design, and cavity wall adopts special material, and liquid level kept level after the amalgam of fluorescent material and glue injected cavity, thereby has realized the thin type coating of phosphor powder layer effectively.Regulate cavity depth, can point of adjustment powder amount, thus regulate the colour temperature and the brightness of led light source.
Description of drawings
Fig. 1 is the structural representation of a kind of white LED light source among the embodiment 1;
Fig. 2 is the structural representation of a kind of white LED light source among the embodiment 2;
Fig. 3 is the structural representation of a kind of white LED light source among the embodiment 3.
Specific embodiment
A kind of white LED light source provided by the invention comprises circular base, on said matrix, is provided with circular groove; Be provided with counter sink in the bottom portion of groove central area; The embedded metal heat sink that is with of counter sink is set with led chip on the metal heat sink surface, is provided with convex lens in the adaptive sealing and fixing of the opening part of groove; And make the groove part of convex lens below form a light-source chamber, and in light-source chamber, fill the fluorescent material filler.Wherein, with regard to the matrix of white LED light source, its profile also can be square or oval, as required, also can be other regular shapes; The shape of groove also can be square or oval; Counter sink can be blind hole, also can be through hole, promptly directly connects the basal surface to matrix by bottom portion of groove, forms a through hole; The part that metal heat sink is exposed at groove outward exceeds the groove floor certain distance slightly, is about about 1mm; The led chip of this white LED light source can be selected blue-light LED chip or purple LED chip for use.
White LED light source of the present invention, the fluorescent material filler of filling in its light-source chamber can be the amalgams that the divalent europium of yttrium aluminium garnet fluorescent powder, the germanate garnet system that glows or the green-emitting of jaundice light activates calcium magnesium chloro-silicate fluorescent material and silica gel or epoxy resin.
With regard to white LED light source of the present invention, the sidewall of its light-source chamber, promptly the sidewall of groove can be perpendicular with its bottom surface, also can be to tilt with its bottom surface, i.e. it is good that ramped shaped, and ramp angle is 0～45 °, preferred 30 °.Simultaneously, in the sidewall surfaces of light-source chamber one deck reflecting layer is set, this reflecting layer can be with the light reflection convex lens direction of led chip to the periphery emission, in order to improve luminous flux and luminous intensity or illumination.
White LED light source of the present invention, the profile of its convex lens can be that the bowl-shape or longitudinal cross-section of spherical crown shape, back-off is U type shape.
When convex lens were selected the bowl-shape convex lens of spherical crown shape or back-off for use, it was the phosphor powder layer of 0.5-1.5mm that a layer thickness can be set at the basal surface of convex lens.This phosphor powder layer adopts modes such as magnetron sputtering or spraying to be prepared in the basal surface of convex lens.When the benefit of this structure is that colour temperature that fluorescent coating that single-component phosphor (such as the yttrium aluminium garnet fluorescent powder of jaundice light) and the amalgam of glue at chip surface formed can not satisfy light source requires with colour rendering index, can change colour temperature and adjusting colour rendering index through redness (or the divalent europium of green light activates calcium magnesium chloro-silicate fluorescent material) fluorescent coating is set at chip surface.This set can avoid two kinds of fluorescent material to mix because the different fluorescent material settling rates that cause of fluorescent material proportion are different with colloid simultaneously effectively, also promptly can effectively solve multiple fluorescent material and mix difficulty, thereby cause the whole photochromic difference of light source.
Above-mentioned convex lens can be selected quartz lens, silica-gel lens or glass lens for use.
Led chip adopts heat conduction elargol or eutectic welding manner to be fixed on the metal heat sink, and the led chip electrode is connected with electrode pad on the matrix through gold thread, thus the connection of realization internal and external electrode.In use; Feed operating current, led chip just can be luminous, because electro-optical efficiency is low; The heat that chip produces mainly is dispersed in the external environment through metal heat sink in time, thereby reduces service life and reliability that junction temperature of chip guarantees light source.At blue light-emitting or purple light chip upper surface, apply the layer of fluorescent powder layer, through two kinds or several kinds of photochromic compound realization white lights.
The present invention can adopt single-component phosphor filler composition; The layering setting that also can adopt the fluorescent material filler to combine with phosphor powder layer; Different classes of fluorescent material proportion is different to cause that fluorescent material disperses uneven problem in the fluorescent coating thereby so just can overcome effectively.Led chip is fixed in the light-source chamber; The fluorescent material filler is the amalgam of fluorescent material and silica gel or epoxy resin; Behind the amalgam injection cavity with fluorescent material and colloid, whole liquid level keeps level, and contacts with the convex lens bottom surface; Adopt simultaneously from the mode of substrate conduction heating or radiation heating, the amalgam of fluorescent material and glue is solidified fast.Thereby the thin type of having realized phosphor powder layer effectively applies.Through regulating the light source cavity depth, can point of adjustment powder amount, thus regulate the colour temperature and the brightness of led light source.
Below in conjunction with accompanying drawing, further explain is done in preferred embodiment of the present invention.
As shown in Figure 1, a kind of white LED light source adopts circular base 2, and this matrix 2 adopts ceramic material; On matrix 2, offer the groove of a toroidal, and the sidewall of groove and its bottom surface are perpendicular, and on sidewall, prepare one deck reflection layer 22 through magnetron sputtering, the openend of this groove is stepped 21.Offer through hole shape counter sink in the bottom of groove, and be embedded in a metal heat sink 4 at counter sink, metal heat sink 4 is about about 1mm in the exposed parts of the groove bottom surface a little more than groove; Adopt heat conduction elargol welding manner to be connected with led chip 5 on the surface of metal heat sink 4; In groove, be filled with fluorescent material filler 3, its height is on the same horizontal plane with the ladder table top 21 of groove; The quartzy material convex lens 1 of spherical crown shape are adaptive to be fixedly installed on the ladder table top 21 of groove, and the bottom surface of convex lens 1 contacts with the surface of fluorescent material filler 3 (yttrium aluminium garnet fluorescent powder of the light that promptly turns to be yellow and the amalgam of silica gel or epoxy resin); The groove part that is positioned at convex lens 1 below forms the light-source chamber of a sealing.
As shown in Figure 2, present embodiment 2 is with the difference of embodiment 1:
Underrun magnetron sputtering mode at silica gel material convex lens 1 prepares the phosphor powder layer 6 that a layer thickness is 0.5mm, and this phosphor powder layer 6 (divalent europium that is green light activates calcium magnesium chloro-silicate fluorescent material) contacts with fluorescent material filler 3 (yttrium aluminium garnet fluorescent powder of the light that promptly turns to be yellow).The benefit of this structure is when colour temperature that fluorescent coating that the amalgam of the yttrium aluminium garnet fluorescent powder of the jaundice light of chip surface and glue is formed can not satisfy light source requires with colour rendering index, can activate the calcium magnesium chloro-silicate fluorescent coating through the divalent europium that green light is set at chip surface and change colour temperature and adjusting colour rendering index.This set can avoid two kinds of fluorescent material to mix because the different fluorescent material settling rates that cause of fluorescent material proportion are different with colloid simultaneously effectively, also promptly can effectively solve multiple fluorescent material and mix difficulty, thereby cause the whole photochromic difference of light source.
As shown in Figure 2, present embodiment 3 is with the difference of embodiment 2:
Underrun magnetron sputtering mode at silica gel material convex lens 1 prepares the phosphor powder layer 6 that a layer thickness is 1.5mm, and this phosphor powder layer 6 (the germanate garnet system that promptly glows) contacts with fluorescent material filler 3 (yttrium aluminium garnet fluorescent powder of the light that promptly turns to be yellow).
As shown in Figure 2, present embodiment 4 is with the difference of embodiment 2:
Underrun magnetron sputtering mode at silica gel material convex lens 1 prepares the phosphor powder layer 6 that a layer thickness is 1.0mm, and this phosphor powder layer 6 (divalent europium that is green light activates calcium magnesium chloro-silicate fluorescent material) contacts with fluorescent material filler 3 (the germanate garnet system that promptly glows).
As shown in Figure 3, present embodiment 5 is with the difference of embodiment 1:
The sidewall of groove, promptly the sidewall of light-source chamber is ramped shaped, and the angle between this sidewall and the bottom surface is 30 °; The profile of glass material convex lens 1 is configured to the bowl-shape of back-off.The benefit of this structure is that sidewall is arranged to the design that the inclined-plane can increase light emission rate and optimize bright dipping.
Should be understood that above-mentioned statement to preferred embodiment of the present invention is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with accompanying claims.
Claims (10)
1. a white LED light source is characterized in that, this white LED light source comprises circular base; On said matrix, be provided with circular groove, be provided with counter sink in said bottom portion of groove central area, the embedded metal heat sink that is with of said counter sink; Be set with led chip on said metal heat sink surface; Be provided with convex lens in the adaptive sealing and fixing of the opening part of said groove, and make the groove part of said convex lens below form a light-source chamber, and in said light-source chamber, fill the fluorescent material filler.
2. white LED light source according to claim 1 is characterized in that, the sidewall of said light-source chamber is the vertical configuration sidewall.
3. white LED light source according to claim 1 is characterized in that, the sidewall of said light-source chamber is the ramped shaped sidewall.
4. according to claim 2 or 3 described white LED light sources, it is characterized in that, on said ramped shaped sidewall, be provided with the reflecting layer.
5. white LED light source according to claim 4 is characterized in that, is provided with a phosphor powder layer in said convex lens bottom surface.
6. white LED light source according to claim 5 is characterized in that, the thickness of said phosphor powder layer is 0.5-1.5mm.
7. white LED light source according to claim 5 is characterized in that, the material of said phosphor powder layer activates calcium magnesium chloro-silicate fluorescent material for the divalent europium of yttrium aluminium garnet fluorescent powder, the germanate garnet system that glows or the green light of jaundice light.
8. white LED light source according to claim 5 is characterized in that, the profile structure of said convex lens is the bowl-shape of spherical crown shape or back-off.
9. white LED light source according to claim 1; It is characterized in that said fluorescent material filler activates the amalgam of calcium magnesium chloro-silicate fluorescent material and silica gel or epoxy resin for the divalent europium of yttrium aluminium garnet fluorescent powder, the germanate garnet system that glows or the green light of jaundice light.
10. according to claim 1 or 9 described white LED light sources, it is characterized in that, said convex lens be in quartz lens, silica-gel lens or the glass lens any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110041009.3A CN102644855B (en) | 2011-02-18 | 2011-02-18 | White-light LED (Light-Emitting Diode) light source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110041009.3A CN102644855B (en) | 2011-02-18 | 2011-02-18 | White-light LED (Light-Emitting Diode) light source |
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| CN102644855A true CN102644855A (en) | 2012-08-22 |
| CN102644855B CN102644855B (en) | 2015-01-07 |
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| CN201110041009.3A Expired - Fee Related CN102644855B (en) | 2011-02-18 | 2011-02-18 | White-light LED (Light-Emitting Diode) light source |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107068834A (en) * | 2016-12-27 | 2017-08-18 | 江苏稳润光电科技有限公司 | A kind of LED product with convex lens |
| CN107546131A (en) * | 2017-08-09 | 2018-01-05 | 合肥圣达电子科技实业有限公司 | A kind of preparation method for being used to encapsulate the metal shell of electronic building brick |
| WO2019019495A1 (en) * | 2017-07-26 | 2019-01-31 | 卢旋坤 | Led-type fluorescent flexible rubber light |
| WO2019029016A1 (en) * | 2017-08-08 | 2019-02-14 | 厦门市三安光电科技有限公司 | Infrared radiation led light emitting element |
| CN110440158A (en) * | 2019-08-20 | 2019-11-12 | 黎庆德 | A kind of LED photovoltaic mould group |
| US10833232B2 (en) | 2017-08-08 | 2020-11-10 | Xiamenc Sanan Optoelectronics Technology Co., Ltd. | LED device |
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Patent Citations (4)
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| US20040041222A1 (en) * | 2002-09-04 | 2004-03-04 | Loh Ban P. | Power surface mount light emitting die package |
| CN101140972A (en) * | 2007-10-15 | 2008-03-12 | 佛山市国星光电股份有限公司 | Power luminous diode packaging structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068834A (en) * | 2016-12-27 | 2017-08-18 | 江苏稳润光电科技有限公司 | A kind of LED product with convex lens |
| WO2019019495A1 (en) * | 2017-07-26 | 2019-01-31 | 卢旋坤 | Led-type fluorescent flexible rubber light |
| WO2019029016A1 (en) * | 2017-08-08 | 2019-02-14 | 厦门市三安光电科技有限公司 | Infrared radiation led light emitting element |
| US10833232B2 (en) | 2017-08-08 | 2020-11-10 | Xiamenc Sanan Optoelectronics Technology Co., Ltd. | LED device |
| CN107546131A (en) * | 2017-08-09 | 2018-01-05 | 合肥圣达电子科技实业有限公司 | A kind of preparation method for being used to encapsulate the metal shell of electronic building brick |
| CN107546131B (en) * | 2017-08-09 | 2019-11-15 | 合肥圣达电子科技实业有限公司 | A kind of production method for encapsulating the metal shell of electronic building brick |
| CN110440158A (en) * | 2019-08-20 | 2019-11-12 | 黎庆德 | A kind of LED photovoltaic mould group |
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| CN102644855B (en) | 2015-01-07 |
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Granted publication date: 20150107 Termination date: 20190218 |