CN102478179A - Light emitting diode (LED) ring-shaped light source - Google Patents
Light emitting diode (LED) ring-shaped light source Download PDFInfo
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- CN102478179A CN102478179A CN2010105579296A CN201010557929A CN102478179A CN 102478179 A CN102478179 A CN 102478179A CN 2010105579296 A CN2010105579296 A CN 2010105579296A CN 201010557929 A CN201010557929 A CN 201010557929A CN 102478179 A CN102478179 A CN 102478179A
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- led
- light source
- light
- ring
- annular light
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Abstract
The invention belongs to the field of photoelectron, and discloses a light emitting diode (LED) ring-shaped light source, which comprises LEDs and a transparent light guide ring, wherein the LEDs are adaptively sleeved in LEDs hole arranged in one end surface of the light guide ring; and a ring-shaped light scattering layer is arranged at the central area of the light guide ring. According to the LED ring-shaped light source provided by the invention, a manner that a white light LED lamp strip is adopted in a traditional LED tubular light source is abandoned, and instead, an LED side surface light emitting manner is adopted; and through the full reflection effect of the outer surface of the light guide ring and the scattering effect of the light scattering layer, the uniformity of a light emergent surface can be guaranteed. Therefore, except that the working procedures are omitted and the cost is reduced, the light efficiency is also greatly improved.
Description
Technical field
The present invention relates to a kind of led light source structure, relate in particular to a kind of apparent LED annular light source that is used to throw light on, shield.
Background technology
After electric light source has experienced this three phases of incandescent lamp, fluorescent lamp and high-intensity gas discharge lamp; People generally believe that the LED electric light source is the most promising new light sources now; Advantages such as a plurality of LED are big with the multiple luminosity that is combined to form high power light source, good directionality, response speed are fast the more important thing is that LED has huge superiority aspect power consumption and life-span.Along with the continuous progress of LED manufacturing technology, its light efficiency is constantly soaring, and the light efficiency of large power white light LED has reached 100lm/W up to now, and the stabilized products light efficiency also has more than the 90lm/W.This light efficiency make LED application more and more widely, comprise in widely used backlight field and the general lighting field that is about to large-scale application.
Though led light source long service life, low in energy consumption; But LED is a spot light, only emits beam to half space, and the result causes the adverse effect of two aspects: the one, and the light that light source sends directly shines the illuminance of ground skewness; Middle bright dark all around, be solar effect; The 2nd, light source has strong dazzle, and vision adaptive is very poor.In order to address the above problem, some producers will be enclosed within the transparent member of LED outside and make the frosted type, and so also existing problems have reduced light efficiency exactly, do not give full play to the advantage of the high light efficiency of led light source.。
Summary of the invention
Based on the problems referred to above, the LED annular light source that the objective of the invention is to propose a kind ofly to provide simple in structure, cost is low, exiting surface is even, the efficiency of light energy utilization is high, light efficiency is high.
A kind of LED annular light source provided by the invention comprises LED, and this LED annular light source comprises LED, and the transparent light guide ring; Said LED is adaptive to be inserted in the LED hole that is provided with on end face of said leaded light ring, and said leaded light ring central area is provided with the light scattering layer of a ring-type.
Described LED annular light source, wherein, the material of said europium leaded light ring is a polymethyl methacrylate, or Merlon.
Described LED annular light source, wherein, said LED is white light LEDs or blue-ray LED.
Described LED annular light source wherein, when said LED is white light LEDs, includes any optical scatter in aluminium oxide, lanthana, silica, zirconium dioxide, titanium dioxide or the barium sulfate in the said light scattering layer; The particle diameter of said optical scatter is 10nm～100 μ m.
Described LED annular light source wherein, when said LED is blue-ray LED, includes at least a fluorescent material in red fluorescence powder, yellow fluorescent powder or the green emitting phosphor in the said light scattering layer; Wherein, said red fluorescence powder is CaS:Eu, SrS:Eu or rare-earth ion activated alkaline-earth metal silicon Nitride phosphor; Said yellow fluorescent powder is the yttrium-aluminium-garnet system fluorescent material of mixing cerium, the terbium aluminium garnet system fluorescent material of mixing cerium, rare-earth ion activated europkium-activated nitride of silicate systems fluorescent material, divalence or the europkium-activated oxide fluorescent powder of divalence; Said green emitting phosphor is SrGa
2S
4: Eu or Ba
2SiO
4: Eu fluorescent material.
Said LED annular light source also comprises a heat-radiating substrate, and said LED is arranged on the said heat-radiating substrate; The material of said heat-radiating substrate is aluminium, copper, iron, alloy or pottery.
Compared with prior art; LED annular light source provided by the invention has been abandoned the mode that adopts the white LED lamp bar in traditional LED cast light source, and adopts LED side formula luminous; Via the total reflection effect of leaded light ring outer surface and the scattering process of light scattering layer, can guarantee the uniformity of exiting surface.Like this,, reduced outside the cost, also improved light efficiency greatly except having saved operation.
Description of drawings
Fig. 1 a is the cutaway view of LED annular light source among the embodiment 1;
Fig. 1 b is the mansion view of LED annular light source among the embodiment 1;
Fig. 2 is the cutaway view of middle LED annular light source among the embodiment 2.
Specific embodiment
A kind of LED annular light source provided by the invention comprises LED, and the transparent light guide ring, and this leaded light ring as selectable shape, can be oval-shaped except adopting circle, also can be square, also can be other shapes; The leaded light ring is except said light scattering layer, and remainder is water white.LED is adaptive to be inserted in the LED hole that is provided with on end face of said leaded light ring, and said leaded light ring central area is provided with the light scattering layer of a ring-type, also comprises the heat-radiating substrate that is used for to the LED heat radiation in the preferred version.The Outboard Sections of said heat-radiating substrate can be a fin-shaped, also can be other shapes that help dispelling the heat; The material of said heat-radiating substrate can be an aluminium, also can be copper, also can be iron, also can be alloy, also can be pottery, also can be other heat sink material.
In this LED annular light source, LED can be a white light LEDs, also can be blue-ray LED, selects encapsulation as required.
When LED is white light LEDs, comprise optical scatter and binding material in the above-mentioned light-emitting layer, like polymethyl methacrylate (PMMA claims acrylic or lucite again), or the material identical with the leaded light ring.It is that 10nm～aluminium oxide, lanthana, silica, zirconium dioxide, titanium dioxide or barium sulfate etc. of 100 μ m have the optical scatter of high index of refraction, low visible light absorptivity that optical scatter is selected from particle diameter, also can have the material of good light scattering property for other.At this moment, other places except LED groove or hole, leaded light ring bottom surface can be smooth, also can be that frosted was handled, and also can plate reflectance coating.When LED was white light LEDs, light that white light LEDs sends was through the total reflection of said leaded light ring surfaces externally and internally and the diffuse reflection effect of scattering layer, made the even bright dipping of surfaces externally and internally of leaded light ring.
When LED is blue-ray LED, comprise fluorescent material and binding material in the above-mentioned light scattering layer, like polymethyl methacrylate (PMMA claims acrylic or lucite again), or the material identical with the leaded light ring.Fluorescent material is selected at least a in red fluorescence powder, yellow fluorescent powder or the green emitting phosphor for use; Fluorescent material when accepting the irradiate light that said blue-ray LED sends, promptly as light-converting material also as light-scattering material, add the total reflection effect of said leaded light ring surfaces externally and internally, make the even bright dipping of surfaces externally and internally of said leaded light ring.Wherein, said red fluorescence powder is CaS:Eu, SrS:Eu or rare-earth ion activated alkaline-earth metal silicon Nitride phosphor; Said yellow fluorescent powder is the yttrium-aluminium-garnet system fluorescent material of mixing cerium, the terbium aluminium garnet system fluorescent material of mixing cerium, rare-earth ion activated europkium-activated nitride of silicate systems fluorescent material, divalence or the europkium-activated oxide fluorescent powder of divalence; Said green emitting phosphor is SrGa
2S
4: Eu or Ba
2SiO
4: Eu fluorescent material.
When fluorescent material is chosen as in the redness that is fit to blue-ray LED and excites, yellow, the green emitting phosphor one or more, blue-ray LED send blue-light excited down, light that fluorescent material sends and remaining blue light are compounded to form white light.
A kind of LED annular light source, wherein, when described LED is blue-ray LED; There is the part of said light scattering layer to be distributed with groove or hole on the bottom surface of described leaded light ring; It is characterized in that, the fluorescent material described in the said light scattering layer when accepting the irradiate light that said blue-ray LED sends, promptly as light-converting material also as light-scattering material; Add the total reflection effect of said leaded light ring surfaces externally and internally, make the even bright dipping of surfaces externally and internally of said leaded light ring.
In the application, selecting the material of water white transparency part in the said leaded light ring for use, can be polymethyl methacrylate (PMMA; Claim acrylic or lucite again); Also can be Merlon (PC), also can be Zeonor (Nippon Zeon Co., Ltd.'s product), also can be 70FH (Japanese Asahi Kasei Corporation product); Also can be glass material, also can be other transparent materials.
In the reality, the LED of LED annular light source is electrically connected on said heat-radiating substrate; And in order to make that circle does not produce the dark space in the leaded light ring, as preferably, reflectance coating is plated in the bottom surface that can in said heat-radiating substrate, be connected with said leaded light ring.
Further, can the bottom surface of said heat-radiating substrate be done taperedly, and,, can do roughening treatment at described conical surface as preferably in said conical surface plating reflecting layer; Perhaps the Outboard Sections of said heat-radiating substrate can be a fin-shaped, also can be other shapes that help dispelling the heat.
The material of heat-radiating substrate can be an aluminium, also can be copper, also can be iron, also can be alloy, also can be pottery, also can be other heat sink material.
Below in conjunction with accompanying drawing, further explain is done in preferred embodiment of the present invention.
Embodiment 1
Shown in Fig. 1 a and 1b, a kind of LED annular light source comprises white light LEDs 11; Transparent light guide ring 13; At the light scattering layer 12 of the central area of leaded light ring 13 ring-type, be used for fixing the heat-radiating substrate 14 of white light LEDs 11 and leaded light ring 13, and white light LEDs 11 and 14 of heat-radiating substrates are electrically connected.White light LEDs 11 is solid brilliant bonding wires and packaged with packaging plastic, can be for pinned, also can adopt SMD in the present embodiment for SMD.
In the present embodiment, the external diameter shape of light scattering layer 12 and leaded light ring 13 is all taked circle,
The water white transparency part evenly is provided with little LED groove or hole in two end faces of leaded light ring 13, and size is complementary with white light LEDs 11, and the place of bottom surface except LED groove or hole is coated with the highly reflecting films of visible light.
The material of the water white transparency part of leaded light ring 13 and the binding material of light scattering layer 12 can be PMMA, also can be PC, also can be glass, also can be chosen as PMMA in the present embodiment for other transparent cake material.
Its material of scattering particles in the light scattering layer 12 can be aluminium oxide, lanthana, silica, zirconium dioxide, titanium dioxide, barium sulfate etc.; The material that also can have good light scattering property for other; In the present embodiment, be chosen as alumina particle, particle diameter is 10nm.
The bottom surface that is connected with leaded light ring 13 in the heat-radiating substrate 14 is adopted the shape on plane in the present embodiment, is distributed with a certain size and the convex globoidal of arranging on the plane, and is coated with reflectance coating.
What the one side shape relative with leaded light ring 13 can be for circle in the heat-radiating substrate 14, also can be for square, also can be for other arbitrary shapes, select circular in the present embodiment.In the present embodiment, have fin with the leaded light ring 13 relative one side outsides in the heat-radiating substrate 14, help heat radiation.
The material of heat-radiating substrate 14 can be an aluminium, also can be copper, also can be iron, also can be alloy, also can be pottery, also can be other heat sink material, adopts aluminium in the present embodiment.
Embodiment 2
As shown in Figure 3; A kind of LED annular light source, basic encapsulating structure and embodiment 1 are similar, and difference is; LED selects blue-ray LED 11 for use; Its number and arrangement mode are also different with embodiment 1, in the present embodiment, blue-ray LED 11 place light scattering layer 12 directly over; Fluorescent material in the light scattering layer 12 is selected for use and is fit to the blue-light excited yellow fluorescent powder that blue-ray LED 11 sends, as mixes in the yttrium-aluminium-garnet system fluorescent material of cerium, the terbium aluminium garnet system fluorescent material of mixing cerium, the rare-earth ion activated europkium-activated nitride of silicate systems fluorescent material, divalence or the europkium-activated oxide fluorescent powder of divalence any; In addition, in the present embodiment, cone shape is adopted in the bottom surface that is connected with leaded light ring 13 in the heat-radiating substrate 14, and surface distributed has a certain size and the convex globoidal of arranging, and is coated with reflective membrane.
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 LED annular light source is characterized in that, this LED annular light source comprises LED, and the transparent light guide ring; Said LED is adaptive to be inserted in the LED hole that is provided with on end face of said leaded light ring, and said leaded light ring central area is provided with the light scattering layer of a ring-type.
2. LED annular light source according to claim 1 is characterized in that, said LED is white light LEDs or blue-ray LED.
3. LED annular light source according to claim 2; It is characterized in that; When said LED is white light LEDs, include any optical scatter in aluminium oxide, lanthana, silica, zirconium dioxide, titanium dioxide or the barium sulfate in the said light scattering layer.
4. LED annular light source according to claim 3 is characterized in that, the particle diameter of said optical scatter is 10nm～100 μ m.
5. LED annular light source according to claim 2 is characterized in that, when said LED is blue-ray LED, includes at least a fluorescent material in red fluorescence powder, yellow fluorescent powder or the green emitting phosphor in the said light scattering layer.
6. LED annular light source according to claim 5 is characterized in that, said red fluorescence powder is CaS:Eu, SrS:Eu or rare-earth ion activated alkaline-earth metal silicon Nitride phosphor.
7. LED annular light source according to claim 5; It is characterized in that said yellow fluorescent powder is the yttrium-aluminium-garnet system fluorescent material of mixing cerium, the terbium aluminium garnet system fluorescent material of mixing cerium, rare-earth ion activated europkium-activated nitride of silicate systems fluorescent material, divalence or the europkium-activated oxide fluorescent powder of divalence.
8. LED annular light source according to claim 5 is characterized in that, said green emitting phosphor is SrGa
2S
4: Eu or Ba
2SiO
4: Eu fluorescent material.
9. LED annular light source according to claim 1 is characterized in that, the material of said leaded light ring is a polymethyl methacrylate, or Merlon.
10. LED annular light source according to claim 1 is characterized in that, said ED annular light source comprises that also a material is the heat-radiating substrate of aluminium, copper, iron, alloy or pottery, and said LED and leaded light ring are arranged on this heat-radiating substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105579296A CN102478179A (en) | 2010-11-24 | 2010-11-24 | Light emitting diode (LED) ring-shaped light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105579296A CN102478179A (en) | 2010-11-24 | 2010-11-24 | Light emitting diode (LED) ring-shaped light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102478179A true CN102478179A (en) | 2012-05-30 |
Family
ID=46090902
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105579296A Pending CN102478179A (en) | 2010-11-24 | 2010-11-24 | Light emitting diode (LED) ring-shaped light source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453348A (en) * | 2012-06-05 | 2013-12-18 | 晶元光电股份有限公司 | Light emitting device |
| CN103486462A (en) * | 2012-06-12 | 2014-01-01 | 松下电器产业株式会社 | Lighting device |
| CN106330084A (en) * | 2016-10-24 | 2017-01-11 | 南方科技大学 | Planar fluorescent condenser with scattering particles and fluorescent quantum dots and method for preparing planar fluorescent condenser |
| CN112344241A (en) * | 2020-11-06 | 2021-02-09 | 海宁海之利照明有限公司 | Safety protection device of LED floor lamp for square illumination |
| CN112980125A (en) * | 2021-02-22 | 2021-06-18 | 安徽新涛光电科技有限公司 | Rayleigh scattering PMMA plate and preparation method thereof |
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| US6169836B1 (en) * | 1998-05-20 | 2001-01-02 | Bridgestone Corporation | Optical transmission tube and method for making the same |
| JP2004296311A (en) * | 2003-03-27 | 2004-10-21 | Matsushita Electric Ind Co Ltd | Surface light emitting device |
| CN101451682A (en) * | 2007-12-06 | 2009-06-10 | 富士迈半导体精密工业（上海）有限公司 | Ring lighting device |
| WO2010046694A1 (en) * | 2008-10-21 | 2010-04-29 | Iti Scotland Limited | Light guides |
| CN201462627U (en) * | 2009-05-07 | 2010-05-12 | 陈铿胜 | Ring-shaped lamp of automobile |
-
2010
- 2010-11-24 CN CN2010105579296A patent/CN102478179A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6169836B1 (en) * | 1998-05-20 | 2001-01-02 | Bridgestone Corporation | Optical transmission tube and method for making the same |
| JP2004296311A (en) * | 2003-03-27 | 2004-10-21 | Matsushita Electric Ind Co Ltd | Surface light emitting device |
| CN101451682A (en) * | 2007-12-06 | 2009-06-10 | 富士迈半导体精密工业（上海）有限公司 | Ring lighting device |
| WO2010046694A1 (en) * | 2008-10-21 | 2010-04-29 | Iti Scotland Limited | Light guides |
| CN201462627U (en) * | 2009-05-07 | 2010-05-12 | 陈铿胜 | Ring-shaped lamp of automobile |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453348A (en) * | 2012-06-05 | 2013-12-18 | 晶元光电股份有限公司 | Light emitting device |
| CN103486462A (en) * | 2012-06-12 | 2014-01-01 | 松下电器产业株式会社 | Lighting device |
| US9488333B2 (en) | 2012-06-12 | 2016-11-08 | Panasonic Intellectual Property Management Co., Ltd. | Lighting device |
| CN106330084A (en) * | 2016-10-24 | 2017-01-11 | 南方科技大学 | Planar fluorescent condenser with scattering particles and fluorescent quantum dots and method for preparing planar fluorescent condenser |
| CN106330084B (en) * | 2016-10-24 | 2019-01-18 | 南方科技大学 | Plane fluorescent condenser and preparation method thereof comprising scattering particles and fluorescence quantum |
| CN112344241A (en) * | 2020-11-06 | 2021-02-09 | 海宁海之利照明有限公司 | Safety protection device of LED floor lamp for square illumination |
| CN112980125A (en) * | 2021-02-22 | 2021-06-18 | 安徽新涛光电科技有限公司 | Rayleigh scattering PMMA plate and preparation method thereof |
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Application publication date: 20120530 |