CN202405256U - LED capable of increasing color rendering index and improving light extraction efficiency - Google Patents
LED capable of increasing color rendering index and improving light extraction efficiency Download PDFInfo
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- CN202405256U CN202405256U CN2011205588702U CN201120558870U CN202405256U CN 202405256 U CN202405256 U CN 202405256U CN 2011205588702 U CN2011205588702 U CN 2011205588702U CN 201120558870 U CN201120558870 U CN 201120558870U CN 202405256 U CN202405256 U CN 202405256U
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- led
- extraction efficiency
- light extraction
- color rendering
- recess
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Abstract
The utility model discloses an LED capable of increasing color rendering index and improving light extraction efficiency, which comprises a substrate. The upper surface of the substrate is provided with recesses of a same depth, bottom faces of the recesses are mounting positions of LED chips, the upper surface of the substrate is also provided with mounting positions of LED chips, chips with wavelength ranging from 380nm to 470nm are mounted at the mounting positions on the recesses, and chips with wavelength ranging from 580nm to 660nm are mounted at the mounting positions on the upper surface of the substrate. Fluorescent powder covering the chips with wavelength ranging from 380nm to 470nm is coated in the recesses, and a transparent adhesive layer is coated on the upper surface of the substrate. By means of the structure, light extraction efficiency can be improved while color rendering index can be increased.
Description
Technical field
The utility model relates to LED.
Background technology
Semiconductor lamp gets into the general illumination field; Production cost is one of key factor of its development of restriction; The COB of white light LEDs commonly used encapsulation at present is that many blue chips directly are fixed on the metal base printed circuit board MCPCB; Though the integrated encapsulation of traditional relatively device can reduce thermal resistance, reduce the manufacturing process and the cost of support simultaneously, the consumption of surperficial continuously coating fluorescent glue is still very big.In addition; The color rendering of light source also is its another key factor in the lighting field development of restriction; In order to improve the color rendering of COB LED, as shown in Figure 1, the method for employing mainly is to add red-light LED in the white light LEDs; And white light LEDs and red-light LED installed at grade; In U.S. Pat 6577073B2 and application number be to be that open day of 2007.2.16 all discloses such COB LED structure in the Chinese patent document of 2008.8.20 200710008637.5 applyings date, this blue chip and red light chips all are encapsulated in the structure and the method on the same surface of substrate, red light chips is covered by fluorescent glue; Will reduce the light extraction efficiency of red light chips, thereby influence the whole luminous efficiency of led light source.
Summary of the invention
In order to improve light extraction efficiency and color rendering index, the utility model provides a kind of LED that improves color rendering index and light extraction efficiency.
The technical scheme that solves the problems of the technologies described above is: a kind of LED that improves color rendering index and light extraction efficiency comprises substrate; Upper surface of base plate is provided with a kind of recess of the degree of depth; The bottom surface of recess is the installation position of led chip; Upper surface of base plate also is provided with the installation position of led chip, and the installation position on the recess is equipped with the chip that wavelength is 380-470nm, and the installation position on the upper surface of base plate is equipped with the chip that wavelength is 580-660nm; In recess, be coated with the fluorescent material that covers on the chip that wavelength is 380-470nm, be coated with substratum transparent at upper surface of base plate.
The LED of said structure, because the led chip installation position with ladder property, and the installation wavelength of the installation position on recess is the chip of 380-470nm; It is the chip of 580-660nm that wavelength is installed in installation position on the upper surface of base plate, like this, and when led chip is luminous; Influence each other is little; And the led chip that is installed on the upper surface of base plate does not cover fluorescent material, can eliminate the absorption effects of fluorescent material, the light efficiency when making self light efficiency to be stimulated far above fluorescent glue; Like this, just can significantly improve the color rendition index and the light extraction efficiency of led light source.Simultaneously, only in recess, be coated with the fluorescent glue that one deck flushes with substrate surface, can practice thrift the consumption of fluorescent material and glue biglyyer, so just can obviously reduce the packaging cost of LED.In addition, the substratum transparent of coating one deck high index of refraction can improve and uniformity of light.
As improvement, the sidewall of recess is provided with reflector layer.Described reflector layer can more reflect away the light of led chip, therefore, can further improve light extraction efficiency.
As improvement, described substrate comprises metal level, insulating barrier and circuit layer, and insulating barrier is located between metal level and the circuit layer.
As improvement, the installation position of recess extends to metal level.This structure, the heat that led chip produced that is installed in the recess can be directly delivered on the metal level, thereby improves being installed to the radiating effect of the led chip in the recess, improves the useful life of led chip.
As specializing, the degree of depth of recess is 0.4-0.6mm.
As improvement, the periphery that on substrate, is positioned at substratum transparent is provided with box dam, and the height of box dam equates with the height of substratum transparent.This structure can prevent that substratum transparent from overflowing, and improves the quality of LED.
Description of drawings
Fig. 1 is the structure chart of prior art COB LED.
Fig. 2 is the vertical view of the utility model.
Fig. 3 is the cutaway view of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further elaborated.
As shown in Figures 2 and 3, the LED that improves color rendering index and light extraction efficiency comprises substrate 1, and substrate 1 comprises metal level 11, insulating barrier 12 and circuit layer 13; Insulating barrier 12 is between metal level 11 and circuit layer 13; Substrate 1 upper surface is provided with the recess 7 of more than one degree of depth, and the bottom surface of recess 7 is the installation position of led chip, and the installation position in the recess extends to metal level 11; To improve radiating efficiency; Substrate 1 upper surface is provided with the installation position 8 of led chip, and the installation position in the recess 7 is used to install the chip 3 that wavelength is 380-470nm, and the installation position on the upper surface of base plate is used to install the chip 4 that wavelength is 580-660nm.In order to be that the more reflection of light of the chip 3 of 380-470nm is come out with wavelength, on the sidewall of recess, be provided with reflector layer 14, in recess 7, be provided with fluorescent material 2, the flush of the height of fluorescent material 2 and substrate 1.On substrate 1, be provided with box dam 6, be coated with the transparent adhesive tape 5 of the high index of refraction that equates with the box dam height in the box dam 6.
The structure of the utility model; The chip of different-waveband is installed on the installation position of differing heights, can reduces influence each other behind the chip light emitting, and be positioned at the uncoated fluorescent material of chip on the upper surface of base plate installation position; Like this; The luminous of chip that is positioned on the upper surface of base plate installation position can not be affected, and can eliminate the absorption effects of fluorescent material, the light efficiency when making self light efficiency to be stimulated far above fluorescent glue; Like this, just can significantly improve the color rendition index and the light extraction efficiency of led light source.Simultaneously, only in recess, be coated with the fluorescent glue that one deck flushes with substrate surface, can practice thrift the consumption of fluorescent material and glue biglyyer, so just can obviously reduce the packaging cost of LED.In addition, the substratum transparent of coating one deck high index of refraction can improve and uniformity of light.
Claims (6)
1. LED who improves color rendering index and light extraction efficiency; Comprise substrate; It is characterized in that: upper surface of base plate is provided with a kind of recess of the degree of depth, and the bottom surface of recess is the installation position of led chip, and upper surface of base plate also is provided with the installation position of led chip; Installation position on the recess is equipped with the chip that wavelength is 380-470nm, and the installation position on the upper surface of base plate is equipped with the chip that wavelength is 580-660nm; In recess, be coated with the fluorescent material that covers on the chip that wavelength is 380-470nm, be coated with substratum transparent at upper surface of base plate.
2. the LED of raising color rendering index according to claim 1 and light extraction efficiency is characterized in that: the sidewall of recess is provided with reflector layer.
3. the LED of raising color rendering index according to claim 1 and 2 and light extraction efficiency is characterized in that: described substrate comprises metal level, insulating barrier and circuit layer, and insulating barrier is located between metal level and the circuit layer.
4. the LED of raising color rendering index according to claim 3 and light extraction efficiency is characterized in that: the installation position of recess extends to metal level.
5. the LED of raising color rendering index according to claim 1 and light extraction efficiency is characterized in that: the degree of depth of recess is 0.4-0.6mm.
6. the LED of raising color rendering index according to claim 1 and light extraction efficiency is characterized in that: the periphery that on substrate, is positioned at substratum transparent is provided with box dam, and the height of box dam equates with the height of substratum transparent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205588702U CN202405256U (en) | 2011-12-29 | 2011-12-29 | LED capable of increasing color rendering index and improving light extraction efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205588702U CN202405256U (en) | 2011-12-29 | 2011-12-29 | LED capable of increasing color rendering index and improving light extraction efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202405256U true CN202405256U (en) | 2012-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205588702U Expired - Fee Related CN202405256U (en) | 2011-12-29 | 2011-12-29 | LED capable of increasing color rendering index and improving light extraction efficiency |
Country Status (1)
| Country | Link |
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| CN (1) | CN202405256U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102569279A (en) * | 2011-12-29 | 2012-07-11 | 广州市鸿利光电股份有限公司 | LED (light-emitting diode) with improved color rendering index and light emitting efficiency and method for improving color rendering index and light emitting efficiency of LED |
| CN104576633A (en) * | 2014-12-06 | 2015-04-29 | 广东聚科照明股份有限公司 | Full color COB light source |
-
2011
- 2011-12-29 CN CN2011205588702U patent/CN202405256U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102569279A (en) * | 2011-12-29 | 2012-07-11 | 广州市鸿利光电股份有限公司 | LED (light-emitting diode) with improved color rendering index and light emitting efficiency and method for improving color rendering index and light emitting efficiency of LED |
| CN104576633A (en) * | 2014-12-06 | 2015-04-29 | 广东聚科照明股份有限公司 | Full color COB light source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 510890 Huadu District, Guangdong, Guangzhou Flower Town, SAST Road, No. 1, No. 1 Patentee after: Hongli Newell group Limited by Share Ltd Address before: 510800 Dongfeng Road West, automobile city, Huadu District, Guangdong, Guangzhou Patentee before: Guangzhou Hongli Tronic Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120829 Termination date: 20191229 |