CN102945918A - Warm white LED (light-emitting diode) light-emitting device - Google Patents
Warm white LED (light-emitting diode) light-emitting device Download PDFInfo
- Publication number
- CN102945918A CN102945918A CN2012105129518A CN201210512951A CN102945918A CN 102945918 A CN102945918 A CN 102945918A CN 2012105129518 A CN2012105129518 A CN 2012105129518A CN 201210512951 A CN201210512951 A CN 201210512951A CN 102945918 A CN102945918 A CN 102945918A
- Authority
- CN
- China
- Prior art keywords
- light
- blue
- emitting device
- warm white
- led chip
- 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.)
- Pending
Links
Images
Landscapes
- Led Device Packages (AREA)
Abstract
The invention relates to a warm white LED (light-emitting diode) light-emitting device. The warm white LED light-emitting device comprises a base, a blue light LED chip group and a red light LED group which are simultaneously arranged, a reflecting shade and a wavelength conversion assembly, wherein the two ends (an upper end and a lower end or a front end and a rear end) of the reflecting shade are respectively connected with the base and the wavelength conversion assembly; the blue light LED chip group and the red light LED group are arranged on one surface, which faces to the wavelength conversion assembly, of the base, and electrode leads of the blue light LED chip group and the red light LED group penetrate through the base; and a coating of a phosphor is arranged on one surface, which faces to the blue light LED chip group and the red light emerging ray, of the wavelength conversion assembly or the other surface of the wavelength conversion assembly, and the wavelength conversion assembly is an acrylate plate or glass plate coated with a transparent organic coating containing the phosphor. The warm white LED light-emitting device provided by the invention utilizes blue light sent by a blue light LED chip and red light sent by a red light LED chip to irradiate the transparent organic coating or glass coating containing the phosphor so as to obtain warm white with high color rendering index, so that the heat dissipation problem is relieved.
Description
Technical field
The present invention relates to light-emitting device, and particularly relate to the warm white LED light-emitting device.
Background technology
White light LEDs has the advantages such as energy-saving and environmental protection and long-life as a kind of new lighting system.Common white light LEDs is based on following operation principle: the LED blue chip sends blue light illumination LED yellow fluorophor (fluorescent material), and fluorophor is subject to exciting of blue light and sends yellow light.The part blue light that the yellow light that these fluorophor are excited to send and blue chip send and synthesize white light.Fluorophor is cured in chip surface by silica gel (or resin) with mixing.This packaged type has its intrinsic shortcoming, and is specific as follows: understand flavescence after the blue light that silica gel or resin send through led chip shines for a long time, affect the light efficiency of luminescent device; Heat has little time to distribute and causes the device working temperature to raise during device work, so that the emission wavelength of fluorophor can drift about; Owing to lack the ruddiness composition, the colour temperature of white light is too high in the white light, and color rendering index is lower.In order to improve the color rendering index of LED luminescent device, there are people's some red led chips that in including the illuminating product of many white LED light sources, distribute equably around the blue chip to reduce the colour temperature of white light, improve its color rendering index.In addition, in order to improve the color rendering index of LED luminescent device, people also add an amount of red fluorescence powder and improve its color rendering index in the yellow fluorescent powder of common white light LEDs, or use three primary colors fluorescent powder (green emitting phosphor+red fluorescence powder) to improve its color rendering index.Because the light efficiency of green emitting phosphor and red fluorescence powder is generally lower, so the light efficiency of luminescent device descends.Above-mentioned corrective measure can not improve the heat radiation of luminescent device and the light decay that therefore causes.
Summary of the invention
The object of the invention is that glass plate that the red light irradiation that provides a kind of blue light plus red light led chip that utilizes blue-light LED chip to send to send contains the resin plate (or glass plate) of the transparent organic coating of fluorophor or contains the glass coating of fluorophor obtains the device of warm white.This light-emitting device can effectively solve the problem of the white light LEDs appearance of above-mentioned utilization conventional package technique.
Technical solution of the present invention is: the warm white LED light-emitting device comprises: base, be provided with blue-light LED chip group and red LED chip group, reflection shield and wavelength transition components simultaneously; The two ends of reflection shield (top and bottom or front end and two ends, rear end) are connected respectively base and wavelength transition components, blue-light LED chip group and red LED chip group are arranged on base, face a face of wavelength transition components, and the contact conductor of blue-light LED chip group and red LED chip group passes base.The coating of fluorophor be located at the wavelength transition components in face of the one side of LED blue chip and red light chips emergent ray or at another side.
Further, the wavelength transition components is the glass plate that scribbles transparent resin plate or the glass plate of the organic coating that comprises fluorophor or scribble the glass coating that comprises fluorophor.Wherein, the fluorophor that comprises of wavelength transition components floating coat is any one LED yellow fluorescent powder (such as YAG yellow fluorescent powder or silicate yellow fluorescent powder etc.).
Further, the wavelength transition components can be multiple physical form, such as plate, spherical, parabolic shape, cylindrical, hyperboloid type or any cabochon.
Further, the fluorophor that organic coating comprises in the wavelength transition components is any one LED yellow fluorescent powder (such as YAG yellow fluorescent powder or silicate yellow fluorescent powder etc.).
Further, the LED blue chip can be jewel (Al
2O
3) blue chip of Grown, also can be the blue chip of SiC Grown, or the blue chip of Si Grown, or be transferred on other substrates after any one growth in above-mentioned three kinds of substrates.Red LED chip comprises III/V compound semiconductor red light chips (such as InGa, AlP) and derived varieties thereof.
Further, blue-light LED chip and red LED chip are the chip of one group of series, parallel or series-parallel connection; The luminous flux that the luminous flux that red LED chip glows and red LED chip glow is 0.5%～25% with the ratio of the summation of the luminous flux of blue-light LED chip institute blue light-emitting.
Further, be coated with on the integrated reflector of reflector or the reflector internal reflection surface metallic film (not plated film also can, such as global facility); Reflection shield is cylindrical, and base and wavelength transition components are respectively as described columniform two bottom surfaces.
Further, wherein reflection shield is reverse frustoconic or bowl-type, and base is gone to the bottom or the bowl end as inverted round stage, and the wavelength transition components is as the upper base of reverse frustoconic or be positioned at the position of the rim of a bowl.
Further, wherein reflection shield is cuboid or chamfered edge platform shape, and base is as going to the bottom of cuboid or going to the bottom of chamfered edge platform shape, and the wavelength transition components is as the upper base of cuboid or chamfered edge platform shape.
Wherein reflection shield is half-cylindrical, and base is along the straight line setting, and this straight line is parallel with semi-cylindrical rectangular surfaces, and this straight line drops on by in axis of a cylinder and the plane vertical with semicircular rectangular surfaces, and the wavelength transition components is as semi-cylindrical rectangular surfaces.
Reflection shield also can be cylindrical, and base and wavelength transition components are respectively as described columniform two bottom surfaces.
In the present invention, base has heat sinking function, is made by metal (such as aluminium etc.) or pottery.
Beneficial effect of the present invention is as follows: 1) do not use in the light-emitting device or less use silica gel or resin, therefore can not occur because of silica gel or the rotten device light efficiency degradation problem that causes of resin.2) uncoated silica gel or the resin that contains fluorophor in LED blue chip surface, so heat dissipation problem is greatly alleviated.3) light-emitting device medium wavelength transition components is away from the LED blue chip, and ruddiness can not absorbed in a large number by fluorophor, therefore the working temperature of fluorophor is lower, and the phenomenons such as the emission wavelength drift that causes because of the device heat radiation and the serious decay of luminous intensity can not appear in fluorophor.
The red light irradiation that the present invention utilizes blue light that blue-light LED chip sends and red LED chip to send contains the transparent organic coating of fluorophor or the warm white that glass coating obtains high color rendering index (CRI), alleviated heat dissipation problem, the emission wavelength drift phenomenon that causes because of the device heat dissipation problem can not appear in fluorophor yet.
Description of drawings
Fig. 1 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 1.
Fig. 2 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 2.
Fig. 3 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 3.
Fig. 4 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 4.
Fig. 5 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 5.
Fig. 6 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 6.
Embodiment:
In order more to understand technology contents of the present invention, especially exemplified by specific embodiment and cooperate appended graphic being described as follows.
Among the embodiment, the two ends of reflection shield 4 connect respectively base 1 and wavelength transition components, blue-light LED chip 2 and red LED chip 3.
Among the embodiment, the two ends of reflection shield 4 connect respectively base 1 and wavelength transition components, blue-light LED chip 2 and red LED chip 3 are arranged on base 1 in the face of the one side of wavelength transition components, and the contact conductor of blue-light LED chip group and red LED chip group passes base, applying the one side contain the organic coating of fluorophor or to contain the glass coating of fluorophor on the wavelength transition components can in face of LED blue chip and red light chips emergent ray, also can oppositely arrange.
In the present embodiment, the LED blue chip can be jewel (Al
2O
3) blue chip of Grown, also can be the blue chip of SiC Grown, or the blue chip of Si Grown, or be transferred on other substrates after any one growth in above-mentioned three kinds of substrates.Red LED chip can be III/V compound semiconductor red light chips (such as InGaAlP) or its derived varieties.
In the present embodiment, blue-light LED chip and red LED chip are the chip of one group of series, parallel or series-parallel connection.Red light chips should be on how much symmetrical placement even to guarantee the ruddiness distribution of light.In order to obtain warm white, the setting principle of red light chips is, the luminous flux that the luminous flux that red LED chip glows and red LED chip glow is 0.5%～25% with the ratio of the summation of the luminous flux of blue-light LED chip institute blue light-emitting.
In the present embodiment, the fluorophor that comprises of wavelength transition components floating coat is any one LED yellow fluorescent powder (such as YAG yellow fluorescent powder or silicate yellow fluorescent powder etc.).Coating can be the organic coating that comprises the LED yellow fluorescent powder, and substrate can be transparent resin plate or glass plate; Coating can also be the glass coating that comprises the LED yellow fluorescent powder, and substrate is glass plate.
In the present embodiment, the base 1 of light-emitting device has heat sinking function concurrently.
In the present embodiment, reflection shield is cylindrical, and internal reflection surface can plate metallic film to strengthen the light reflection effect.
Embodiment 2:
Fig. 2 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 2.Present embodiment is 4 one-tenth reverse frustoconics of reflection shield with the difference of embodiment 1, and base 17 is gone to the bottom as reverse frustoconic, and the wavelength transition components is as the upper base of reverse frustoconic.
Embodiment 3:
Fig. 3 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 3.The difference of present embodiment and embodiment 1 is that reflection shield 4 is bowl-type, and base 1 is as the bowl end, and the wavelength transition components is positioned at the position of the rim of a bowl.
Embodiment 4:
Fig. 4 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 4.The difference of present embodiment and embodiment 1 is that reflection shield is cuboid, and base 1 is gone to the bottom as cuboid, and the wavelength transition components is as the upper base of cuboid.Reflector is made of the reflecting surface 22 and 23 of 4 rectangles.One group of relative in 4 reflectings surface 22 and 23 reflecting surface physical dimension is identical, and two adjacent reflecting surface physical dimensions can be identical, also can be different, and its shape can be square or rectangular.
Embodiment 5:
Fig. 5 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 5.The difference of present embodiment and embodiment 1 is that reflection shield is chamfered edge platform shape, and base 1 is gone to the bottom as chamfered edge platform shape, and the wavelength transition components is as the upper base of chamfered edge platform shape.Reflector 4 is made of the reflecting surface 29 and 30 of four inverted trapezoidals.One group of relative in four reflectings surface 29 and 30 reflecting surface physical dimension is identical, and two adjacent reflecting surface physical dimensions can be identical, also can be different.
Embodiment 6:
Fig. 6 is the schematic diagram of the warm white LED light-emitting device of the embodiment of the invention 6.The difference of present embodiment and embodiment 1 is that reflection shield is half-cylindrical, have reflecting surface 36 and 37, base 33 be arranged in parallel with semi-cylindrical rectangular surfaces, perhaps base 33 also can with the non-parallel setting of semi-cylindrical rectangular surfaces, the wavelength transition components is as semi-cylindrical rectangular surfaces.
In sum, do not use in the light-emitting device of the present invention or less use silica gel or resin, therefore can not occur because of silica gel or the rotten device light efficiency decline problem that causes of resin; Uncoated silica gel or the resin that contains fluorophor in LED blue chip surface, so heat dissipation problem is greatly alleviated; Contain the substrate of fluorescent coating in the light-emitting device away from the LED blue chip, so the problems such as the fluorophor emission wavelength drift that can not occur causing because of the device heat dissipation problem and luminous intensity decay; Be symmetrically distributed with red light chips around the blue chip, the ruddiness that red light chips sends can replenish blue chip and add the ruddiness composition that lacks in the white light that the yellow fluorescent powder combination obtains, and the white light colour temperature that therefore luminous light-emitting device obtains is lower, and color rendering index is higher; In addition, because the red light chips light efficiency is higher, so the light efficiency Billy of luminescent device adds three primary colors fluorescent powder or yellow fluorescent powder with blue chip and adds the red fluorescence powder combination to obtain the light efficiency of warm white device high among the present invention.
Above technical solution of the present invention and embodiment have illustrated basic comprising of the present invention, but embodiment and non-limiting the present invention, based on simple modifications of the present invention or or equivalence replace and do not exceed protection scope of the present invention.
Claims (10)
1. a warm white LED light-emitting device is characterized in that, comprises base, blue-light LED chip group and red LED chip group, reflection shield and wavelength transition components; The two ends of reflection shield connect respectively base and wavelength transition components, and blue-light LED chip group and red LED chip group are arranged on base, face a face of wavelength transition components, and the contact conductor of blue-light LED chip group and red LED chip group passes base; The coating of fluorophor be located at the wavelength transition components in face of the one side of LED blue chip and red light chips emergent ray or at another side.
2. warm white LED light-emitting device according to claim 1 is characterized in that, the wavelength transition components is the glass plate that scribbles transparent resin plate or the glass plate of the organic coating that comprises fluorophor or scribble the glass coating that comprises fluorophor.
3. warm white LED light-emitting device according to claim 2 is characterized in that, the wavelength transition components can be multiple physical form, such as plate, spherical, parabolic shape, cylindrical, hyperboloid type or any cabochon.
4. warm white LED light-emitting device according to claim 1 is characterized in that, the fluorophor that organic coating comprises in the wavelength transition components is any one LED yellow fluorescent powder (such as YAG yellow fluorescent powder or silicate yellow fluorescent powder etc.).
5. warm white LED light-emitting device according to claim 1, it is characterized in that, the LED blue chip can be the blue chip of jewel (Al2O3) Grown, it also can be the blue chip of SiC Grown, or the blue chip of Si Grown, or be transferred on other substrates after any one growth in above-mentioned three kinds of substrates.The red-light LED chip comprises III/V compound semiconductor red light chips (such as InGa, AlP) and derived varieties thereof.
6. warm white LED light-emitting device according to claim 1 is characterized in that, blue-light LED chip and red LED chip are the chip of one group of series, parallel or series-parallel connection; The luminous flux that the luminous flux that red LED chip glows and red LED chip glow is 0.5%～25% with the ratio of the summation of the luminous flux of blue-light LED chip institute blue light-emitting.
7. warm white LED light-emitting device according to claim 1, it is characterized in that, wherein be coated with metallic film on the integrated reflector of reflector or the reflector internal reflection surface, reflection shield is cylindrical, base and wavelength transition components are respectively as described columniform two bottom surfaces.
8. warm white LED light-emitting device according to claim 1 is characterized in that, wherein reflection shield is reverse frustoconic or bowl-type, and base is gone to the bottom or the bowl end as inverted round stage, and the wavelength transition components is as the upper base of reverse frustoconic or be positioned at the position of the rim of a bowl.
9. warm white LED light-emitting device according to claim 1 is characterized in that, wherein reflection shield is cuboid or chamfered edge platform shape, and base is as going to the bottom of cuboid or going to the bottom of chamfered edge platform shape, and the wavelength transition components is as the upper base of cuboid or chamfered edge platform shape.
10. described warm white LED light-emitting device one of according to claim 1-9, it is characterized in that, wherein reflection shield is half-cylindrical, base is along the straight line setting, this straight line is parallel with semi-cylindrical rectangular surfaces, and this straight line drops on by in axis of a cylinder and the plane vertical with semicircular rectangular surfaces, and the wavelength transition components is as semi-cylindrical rectangular surfaces.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105129518A CN102945918A (en) | 2012-12-05 | 2012-12-05 | Warm white LED (light-emitting diode) light-emitting device |
| US14/376,413 US9490402B2 (en) | 2012-08-17 | 2013-04-16 | LED light-emitting device for white light |
| PCT/CN2013/074277 WO2013159664A1 (en) | 2012-04-26 | 2013-04-16 | White light led light-emitting device and method for preparing thereof |
| PCT/CN2013/074279 WO2014026486A1 (en) | 2012-08-17 | 2013-04-16 | Led light-emitting device for white light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105129518A CN102945918A (en) | 2012-12-05 | 2012-12-05 | Warm white LED (light-emitting diode) light-emitting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102945918A true CN102945918A (en) | 2013-02-27 |
Family
ID=47728841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105129518A Pending CN102945918A (en) | 2012-04-26 | 2012-12-05 | Warm white LED (light-emitting diode) light-emitting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102945918A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159664A1 (en) * | 2012-04-26 | 2013-10-31 | Qian Zhiqiang | White light led light-emitting device and method for preparing thereof |
| CN103489857A (en) * | 2013-09-06 | 2014-01-01 | 殷江 | White light LED light-emitting device |
| WO2014026486A1 (en) * | 2012-08-17 | 2014-02-20 | Qian Zhiqiang | Led light-emitting device for white light |
| CN107248511A (en) * | 2017-06-23 | 2017-10-13 | 厦门大学 | A kind of three primary colours white light LEDs with low department's occasion rhythm and pace of moving things factor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354719A (en) * | 2011-09-28 | 2012-02-15 | 郑榕彬 | Device and method for producing white light with high color rendering index |
| EP2479811A1 (en) * | 2009-09-17 | 2012-07-25 | Kabushiki Kaisha Toshiba | White-light emitting lamp and white-light led lighting device using same |
| CN102646674A (en) * | 2012-04-26 | 2012-08-22 | 南通脉锐光电科技有限公司 | Light-emitting device of white-light LED (light-emitting diode) |
-
2012
- 2012-12-05 CN CN2012105129518A patent/CN102945918A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2479811A1 (en) * | 2009-09-17 | 2012-07-25 | Kabushiki Kaisha Toshiba | White-light emitting lamp and white-light led lighting device using same |
| CN102354719A (en) * | 2011-09-28 | 2012-02-15 | 郑榕彬 | Device and method for producing white light with high color rendering index |
| CN102646674A (en) * | 2012-04-26 | 2012-08-22 | 南通脉锐光电科技有限公司 | Light-emitting device of white-light LED (light-emitting diode) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159664A1 (en) * | 2012-04-26 | 2013-10-31 | Qian Zhiqiang | White light led light-emitting device and method for preparing thereof |
| WO2014026486A1 (en) * | 2012-08-17 | 2014-02-20 | Qian Zhiqiang | Led light-emitting device for white light |
| CN103489857A (en) * | 2013-09-06 | 2014-01-01 | 殷江 | White light LED light-emitting device |
| CN103489857B (en) * | 2013-09-06 | 2017-06-06 | 中山市天健照明电器有限公司 | A kind of White LED light-emitting device |
| CN107248511A (en) * | 2017-06-23 | 2017-10-13 | 厦门大学 | A kind of three primary colours white light LEDs with low department's occasion rhythm and pace of moving things factor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104600181A (en) | LED (Light Emitting Diode) light bar and preparation method thereof | |
| US9923126B2 (en) | Light emitting device having high color rendering using three phosphor types | |
| TWI458139B (en) | White light emitting diode module | |
| CN201539737U (en) | LED lamp | |
| CN101661987A (en) | White light LED packaging structure and packaging method thereof | |
| CN101915369A (en) | LED white light source module | |
| CN103779346A (en) | Near ultraviolet or ultraviolet excited LED light-emitting device | |
| TWM462822U (en) | Dual-chip LED | |
| CN102646674A (en) | Light-emitting device of white-light LED (light-emitting diode) | |
| CN103872034A (en) | Total-angle light emitting LED light source based on light transmission substrate and packaging method of total-angle light emitting LED light source | |
| CN103050615B (en) | A kind of White LED with high color rendering property device | |
| CN108987549A (en) | A kind of white chip preparation method | |
| CN102945918A (en) | Warm white LED (light-emitting diode) light-emitting device | |
| CN102005531A (en) | Packaging structure and packaging method of inverted LED (light emitting diode) chip | |
| CN103078048B (en) | White light emitting device | |
| CN103489857B (en) | A kind of White LED light-emitting device | |
| CN102810537B (en) | White LED light-emitting device | |
| CN209471995U (en) | High photosynthetic efficiency White-light LED chip | |
| CN108987556A (en) | A kind of white chip | |
| CN207303133U (en) | A kind of height of adjustable colour rendering index shows COB light source device | |
| CN203690296U (en) | High power RGBW cross color mixing COB integrated packaging structure | |
| JP2014086696A (en) | Light-emitting device | |
| CN204189795U (en) | Arc MCOB LED encapsulation structure | |
| CN202549924U (en) | Novel light-emitting diode (LED) device | |
| CN203415624U (en) | White LED with high color rendering index |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130227 |