CN201339876Y - LED light source for reducing damage of light radiation - Google Patents
LED light source for reducing damage of light radiation Download PDFInfo
- Publication number
- CN201339876Y CN201339876Y CNU2007201715897U CN200720171589U CN201339876Y CN 201339876 Y CN201339876 Y CN 201339876Y CN U2007201715897 U CNU2007201715897 U CN U2007201715897U CN 200720171589 U CN200720171589 U CN 200720171589U CN 201339876 Y CN201339876 Y CN 201339876Y
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- Prior art keywords
- led
- light source
- light
- filtering film
- spectral filtering
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- Expired - Fee Related
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Abstract
The utility model provides a structure of LED light source for reducing damage of light radiation, comprising an LED device and a spectrum filtering membrane for filtering light ray emitted from the LED device. The light emitted from the LED device is emitted to outside through the spectrum filtering membrane; the spectrum filtering membrane absorbs light with a wavelength within the short wavelength less than 440 nm and a long wavelength greater than 780 nm, and the transmission rate of light within the wavelength range is not greater than 50 percent; the LED device can be single color or multiple colors; the spectrum filtering membrane is a Makrolan sheet or a glass sheet; coating or cladding is evenly arranged on the surface of the sheet; and the coating or cladding contains a light radiation absorbent which can absorb light radiation within the range of short wavelength and long wavelength.
Description
Technical field
The utility model relates to semiconductor technology, is specifically related to light emitting diode (Light-EmittingDiode, the LED) encapsulation technology of light source, light filtering technique; The utility model also relates to the encapsulating structure of this light source.
Technical background
Along with the appearance of ultra-bright LED, its efficient is more and more higher, and price descends gradually.Simultaneously LED have life-span length, vibration resistance, luminous efficiency height, noiseless, be not afraid of characteristics such as low temperature, no mercury pollution problem and cost performance height, big potentiality commodity of the alternative traditional lighting utensil of being had an optimistic view of by semicon industry.Ultra-high brightness LED has been expanded LED greatly and has been shown and the lighting source Application for Field at various signals, as lamp, various traffic lights inside and outside the automobile, indoor and outdoor information display screen and backlight.The LED product is used for illumination, will provides more wide application space for LED.
Along with the range of application of led light source more and more widely, the light radiation of led light source harm problem must be paid attention to.
The harm that the light that light radiation harm mainly is meant different-waveband causes the excessive irradiation of human body, mainly be to human eye and skin, as near ultraviolet harm, the harm of retina blue light photochemistry, the harm of retina aphacia photochemistry, the harm of retina heat and the skin heat harm etc. of the harm of the photochemistry of skin and eyes, eyes, and easier among both what come to harm is eyes.In recent years, along with the increase day by day of great power LED, the brightness of LED is more and more higher, and radiation hazard is also more and more stronger.
In the wavelength band of light radiation, the short wavelength of purple, near ultraviolet, ultraviolet and near-infrared, infrared L-band be easier to cause biohazard.
Light radiation is as follows to the harm of eyes: 1) be subjected to the ultra-violet radiation irradiation of certain hour when human body, can cause photic keratitis and photic conjunctivitis; 2) long-term UV-irradiation can cause cataract; 3) strong light radiation irradiation can cause retinal burn, and causing the most tangible wave band of effect of this harm is 435～440nm; 4) be accompanied by the harm of retina heat, radiation energy causes photochemistry harm to retina, even can cause the retinitis, and the light harm of wavelength 440nm is maximum; 5) be subjected to the infra-red radiation influence for a long time and can cause cataract, the maximum wave band of harm is 780～1400nm.
And for skin, the injury that light radiation caused has: 1) durable tanned, causing rubefaction and the most effective sore wave band is the following ultra-violet radiation of 320nm; 2) skin aging, long-term radiation energy quickens skin aging, presents drying, coarse, hide-like and the innumerable outward appearance of wrinkle; 3) cutaneum carcinoma is accepted the most serious result that ultra-violet radiation causes for a long time and is caused cutaneum carcinoma.
At present international and domesticly formulating a plurality of corresponding standard aspect the test evaluation of light radiation safety.But LED is difference and the new type light source of coherent sources such as traditional incoherent light source and laser, also is in the starting stage at present for the research of the test and evaluation method of the light radiation harm of LED.
Because LED is in the continuous development of lighting field, CIE (International Commission on Illumination) has made regulation to the security of LED in the CIE of latest edition S 009/E:2002 standard.LED is caused the spoke limit value that exposes to the sun of harm such as near ultraviolet harm, the harm of retina blue light photochemistry, the harm of retina aphacia photochemistry, the harm of retina heat and skin heat harm of photochemistry harm, the eyes of skin and eyes made regulation.After CIE S 009/E:2002 standard was put into effect, IEC all quoted in 2002, and with published new standard IEC-62471 in view of the above in 2006, its importance has some idea of.
Domestic, the national standard " the photoproduction thing security of lamp and lamp system " that is directed to common incoherent, broadband lamp and lamp system is in formal enforcement (GB/T 20145-2006) in 2006, and this standard instructs the photoproduction thing security of various light fixtures.
The patent documentation of relevant led light source is a lot, but does not have pair purple, near ultraviolet, ultraviolet and near-infrared, infrared band to filter, and to reduce the light radiation harm of light source, makes led light source meet the patent of biological safety.
The utility model content
The utility model provides a kind of structure that reduces the led light source of light radiation harm.
A kind of led light source structure that reduces light radiation harm, comprise the LED device, and the spectral filtering film that is used to filter the light that the LED device sends, wherein the light that sends of LED device is transmitted into the outside through spectral filtering film, it is characterized in that the spectral filtering film absorbing wavelength less than the short wavelength range of 440nm and wavelength greater than the light in long wavelength's scope of 780nm.
The LED device is a packaging.
The LED device comprises led chip and holds the also pedestal of fixed L ED chip, and above-mentioned filter membrane is installed on the pedestal.
The transmitance of the light of above-mentioned wave-length coverage is not more than 50%.
The LED device is monochromatic, and the led chip of a kind of color of encapsulation has a led chip at least in the LED device in the LED device.
The LED device is a polychrome, with the led chip mutual encapsulation of multiple color in a LED device.
Spectral filtering film is polycarbonate sheet or glass flake, and on the surface of this thin slice uniform coating or coating is arranged, and contains the light radiation absorbent in described coating or the coating, and this absorbent absorbs the light radiation in described short wavelength and the long wavelength's scope.
Form coating or coating or two sides in the one side of described thin slice and all form coating or coating, or use two-layer spectral filtering film, filter the light radiation in short wavelength and the long wavelength's scope respectively.
Make an overcoat, this overcoat entangles LED device and spectral filtering film, and makes their fixed-site each other, and spectral filtering film is positioned at the top of led chip.
The top perforate of overcoat is transmitted into the outside after making light see through spectral filtering film, and the hole of overcoat top is split into tubaeform.
Also be included in the described hole of top of spectral filtering film, and the gap location between the below of spectral filtering film and the LED device is packed into flexible glue.
As shown in Figure 1, the structure that the utility model reduces the led light source of light radiation harm comprises by at least one led chip 11, with the LED device 1 that holds and the pedestal 12 of fixed L ED chip forms, and be installed in the spectral filtering film 2 that is used to filter the light that led chip sends on the pedestal, wherein the light that sends of led chip is transmitted into the outside through spectral filtering film, it is characterized in that spectral filtering film can absorbing wavelength less than the short wavelength range of 440nm and wavelength greater than the light in long wavelength's scope of 780nm, and the light transmission rate in above-mentioned wave-length coverage is not more than 50%, to reduce led light source light radiation harm; Spectral filtering film can just add when packaged LED device 1, also can install when the LED device being carried out the secondary encapsulation.
The LED device can be monochrome or polychrome, and monochrome is the led chip of a certain color of encapsulation in the LED device, makes its light that sends a kind of color, has a led chip in the LED device at least; Polychrome then is that led chip mutual encapsulation with multiple color is in a LED device, as the mutual encapsulation of red, blue, green three color chip mutual encapsulation or other color chip portfolio.
Spectral filtering film can for any can absorbing wavelength less than 440nm with greater than the filter membrane of the light radiation in the 780nm scope, light transmission rate in above-mentioned wave-length coverage is not more than 50%, and at remaining visible wavelength range higher transmittance is arranged, generally greater than 85%.Spectral filtering film is polycarbonate sheet or glass flake etc., and on the surface of this thin slice uniform coating or coating is arranged, and wherein contains the light radiation absorbent, and this absorbent can absorb the light radiation in above-mentioned short wavelength and the long wavelength's scope.Modes such as available spraying or vacuum coating form coating or coating.According to the needs of spectral filtering, can form coating or coating or two sides in the one side of this thin slice and all form coating or coating, also can use two-layer spectral filtering film, filter the light radiation in short wavelength and the long wavelength's scope respectively.Spectral filtering film is a prior art, and wherein the main component of the light radiation absorbent of long wavelength's scope generally is SiO
2(silica), ZnO (zinc oxide) etc., the main component of the light radiation absorbent of short wavelength range generally is TiO
2(titanium oxide), CeO
2The zinc oxide fine particles of (cesium oxide) or doped indium etc. have narration in some documents and patent.Spectral filtering film can obtain by commercial or customization.
The encapsulating structure of various types of LED devices comprises SMD or vertical type, is with optical lens or is not with types such as optical lens, plastics, pottery or Metal Packaging, and spectral filtering film all can be installed, and filters the light radiation in above-mentioned short wavelength and the long wavelength's scope.
Since led light source of the present utility model after filtration the light radiation in the higher wave band of biohazard, therefore, when this led light source uses, just do not need the additional in addition short wavelength of filtration and long wavelength's device not to reduce light radiation harm.
Be described in further detail the utility model with reference to the accompanying drawings in conjunction with the embodiments.
Description of drawings
Fig. 1 is the structural profile schematic diagram of the utility model led light source;
Fig. 2 is the generalized section that adds the embodiment of spectral filtering film in the LED device encapsulation structure;
Fig. 3 is the generalized section of another embodiment of the utility model;
Fig. 4 carries out secondary to the LED device to encapsulate the generalized section that spectral filtering film is installed.
The specific embodiment
Embodiment one
See also Fig. 2, a LED device 1 has encapsulated 11, one spectral filtering film 2 of a led chip 12 li of LED pedestals and has been positioned at led chip 11 tops, and has been fixed in the LED pedestal 12.
This spectral filtering film 2 is a thin slice, and at least one surface scribbles layer of even coating, contain in the coating can absorbing wavelength less than 440nm with greater than the absorbent of the light radiation in the 780nm scope.This spectral filtering film is fixed in the pedestal 12 by gluing connecing.
The cavity embedding at led chip 11 places the high glue of optical transmittance, structures such as led chip are formed protection.
During work, the light that led chip 11 sends must be filtered less than 440nm with greater than the light in the 780nm scope the wavelength that led chip sends by spectral filtering film by just being transmitted into the outside after the spectral filtering film 2.
Led chip 11 can be selected any needed glow color, is the green glow of 530nm as dominant wavelength for example; Dominant wavelength is the blue light of 470nm for another example, and mixes a certain proportion of YAG powder in the glue of embedding, and the blue-light excited YAG powder by led chip sends obtains the white light that colour temperature is 8000K at last.
Embodiment two
See also Fig. 3, basic identical with embodiment one, different above spectral filtering film 2, have an optical lens 13, so that led light source forms the light radiation pattern of needs.
The material of these lens is optical plastic or glass etc.
Embodiment three
See also Fig. 4, a LED device 1, itself does not have spectral filtering film 2.
Make an overcoat 3, this overcoat can entangle LED device 1 and spectral filtering film 2, and makes their fixed-site each other.The top perforate of overcoat can be transmitted into the outside after making light see through spectral filtering film.
Spectral filtering film is put into overcoat, then overcoat is entangled the LED device, and will fix between overcoat and the LED device with glue, like this, spectral filtering film just is fixed in the overcoat, and is positioned at the top of led chip 11.
In order to make light have the angle of departure preferably, the hole of overcoat top can be split into tubaeform.Overcoat can be made of plastic, and also available metal or other materials process.
This spectral filtering film 2 is a thin slice, and at least one surface scribbles layer of even coating, contain in the coating can absorbing wavelength less than 440nm with greater than the absorbent of the light radiation in the 780nm scope.
The cavity embedding at led chip 11 places the high glue of optical transmittance, structures such as led chip are formed protection.
In order to make the protection spectral filtering film; and reduce the transmission loss of light in led light source inside, can be above spectral filtering film, in the pit that overcoat forms; and the gap location between the below of spectral filtering film and the LED device is packed into flexible glue 4, as shown in Figure 4.The preferred high glue of optical transmittance that uses.
During work, the light that led chip 11 sends must be filtered less than 440nm with greater than the light in the 780nm scope the wavelength that led chip sends by spectral filtering film by just being transmitted into the outside after the spectral filtering film 2.
Led chip 11 can be selected any needed glow color.
Embodiment four
Basic identical with embodiment one, different is in the LED device, has encapsulated multi-colored led chip, for example as red, blue, green three-color LED chip mutual encapsulation.During work, the light that multi-colored led chip sends must be filtered less than 440nm with greater than the light in the 780nm scope the wavelength that led chip sends by spectral filtering film by just being transmitted into the outside after the spectral filtering film.
In addition, the foregoing description one～three, wherein the led chip in the LED device all can make many of monochromatic many and polychromes according to actual needs into.
The utility model provides a kind of structure that reduces the led light source of light radiation harm.Above-mentioned description and accompanying drawing just be used to illustrate utility model and without any the restriction purpose.
Claims (10)
1. a led light source structure that reduces light radiation harm is characterized in that comprising the LED device, and spectral filtering film.
2. according to the described led light source structure of claim 1, it is characterized in that the LED device is a packaging.
3. according to the described led light source structure of claim 1, it is characterized in that the LED device comprises led chip and holds the also pedestal of fixed L ED chip, and above-mentioned spectral filtering film is installed on the pedestal.
4. according to the arbitrary described led light source structure of claim 1-3, it is characterized in that the LED device for monochromatic, the led chip of a kind of color of encapsulation has a led chip at least in the LED device in the LED device.
5. according to the arbitrary described led light source structure of claim 1-3, it is characterized in that the LED device is a polychrome, with the led chip mutual encapsulation of multiple color in a LED device.
6. according to the arbitrary described led light source structure of claim 1-3, it is characterized in that spectral filtering film is polycarbonate sheet or glass flake, and uniform coating or coating are arranged, contain the light radiation absorbent in described coating or the coating on the surface of this thin slice.
7. according to the described led light source structure of claim 6, it is characterized in that one side at described thin slice forms coating or coating or two sides and all forms coating or coating, or use two-layer spectral filtering film, filter the light radiation in short wavelength and the long wavelength's scope respectively.
8. according to the arbitrary described led light source structure of claim 1-3, it is characterized in that having an overcoat that makes spectral filtering film be fixed on the top of led chip.
9. described according to Claim 8 led light source structure is characterized in that the top perforate of overcoat.
10. according to the described led light source structure of claim 9, it is characterized in that also being included in the described hole of top of spectral filtering film, and the gap location between the below of spectral filtering film and the LED device is packed into flexible glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201715897U CN201339876Y (en) | 2007-12-21 | 2007-12-21 | LED light source for reducing damage of light radiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201715897U CN201339876Y (en) | 2007-12-21 | 2007-12-21 | LED light source for reducing damage of light radiation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201339876Y true CN201339876Y (en) | 2009-11-04 |
Family
ID=41235422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201715897U Expired - Fee Related CN201339876Y (en) | 2007-12-21 | 2007-12-21 | LED light source for reducing damage of light radiation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201339876Y (en) |
-
2007
- 2007-12-21 CN CNU2007201715897U patent/CN201339876Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Mingyuan Document name: Notification to Make Rectification |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LI XINYANG Free format text: FORMER OWNER: SHENZHEN ZHONGDIAN MIAOHAO SOLID LIGHT SOURCE CO., LTD. Effective date: 20111110 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518102 SHENZHEN, GUANGDONG PROVINCE TO: 518054 SHENZHEN, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111110 Address after: 518054 Guangdong city of Shenzhen province Nanshan District Chuangye Road, Lantau garden building 902 room 8 Patentee after: Li Xinyang Address before: 518102 R & D center, 1, science and Technology Innovation Park, Baoan the Peach Garden, Shenzhen, Baoan District, Guangdong Patentee before: Shenzhen Zhongdian Miaohao Solid Light Source Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20141221 |
|
| EXPY | Termination of patent right or utility model |