IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0262893
(2005-11-01)
|
등록번호 |
US-7501749
(2009-03-10)
|
우선권정보 |
JP-P.2004-320506(2004-11-04) |
발명자
/ 주소 |
- Takeda,Hitoshi
- Kuboyama,Osamu
|
출원인 / 주소 |
- Koito Manufacturing Co., Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
143 인용 특허 :
0 |
초록
▼
A light-emitting device (2) including a light-emitting element (2a), a first phosphor (2b), and a second phosphor (2c). The light-emitting element (2a) emits light L1 having a wavelength range within the visible region. Upon receipt of the light L1, or light L3 originating from the second phosphor (
A light-emitting device (2) including a light-emitting element (2a), a first phosphor (2b), and a second phosphor (2c). The light-emitting element (2a) emits light L1 having a wavelength range within the visible region. Upon receipt of the light L1, or light L3 originating from the second phosphor (2c), the first phosphor (2b) emits light L2 having a wavelength range, which differs from that of the first light L1 and the third light L3, but falls within the visible region. Upon receipt of a specific wavelength component (ultraviolet light, or the like) included in external light, the second phosphor (2c) generates the light L3 whose wavelength range is substantially the same as that of the light L1, thereby radiating the first phosphor (2b) with the light L3.
대표청구항
▼
What is claimed is: 1. A light-emitting device configured to obtain a predetermined light source color by mixing a luminescent color and a fluorescent color, comprising: a light-emitting element for emitting first light including a wavelength range that falls within a visible region; a first phosph
What is claimed is: 1. A light-emitting device configured to obtain a predetermined light source color by mixing a luminescent color and a fluorescent color, comprising: a light-emitting element for emitting first light including a wavelength range that falls within a visible region; a first phosphor for, upon receipt of said first light or a third light, emitting a second light including a wavelength range that differs from that of said first light and said third light but falls within a visible region; and a second phosphor for, upon receipt of a specific wavelength component included in external light, generating said third light including a wavelength range that is substantially the same as that of said first light, thereby radiating said first phosphor with said third light. 2. The light-emitting device defined in claim 1, wherein said first light and said third light have wavelength ranges including blue; and said second light has a wavelength range including yellow. 3. The light-emitting device defined in claim 1, wherein said second phosphor is excited by ultraviolet light. 4. The light-emitting device defined in claim 1, wherein said first phosphor and said second phosphor are laminated, in this order, on said light-emitting element; and said first light and said second light are transmitted through said second phosphor. 5. The light-emitting device defined in claim 1, wherein phosphor nano-particles, having a particle size smaller than a wavelength of said first light, are employed as said second phosphor. 6. The light-emitting device defined in claim 2, wherein said second phosphor is excited by ultraviolet light. 7. The light-emitting device defined in claim 2, wherein said first phosphor and said second phosphor are laminated, in this order, on said light-emitting element; and said first light and said second light are transmitted through said second phosphor. 8. The light-emitting device defined in claim 2, wherein phosphor nano-particles whose particle size is smaller than a wavelength of said first light are employed as said second phosphor. 9. The light-emitting device defined in claim 3, wherein said first phosphor and said second phosphor are laminated, in this order, on said light-emitting element; and said first light and said second light are transmitted through said second phosphor. 10. The light-emitting device defined in claim 3, wherein phosphor nano-particles, having a particle size smaller than a wavelength of said first light, are employed as said second phosphor. 11. The light-emitting device defined in claim 6, wherein said first phosphor and said second phosphor are laminated, in this order, on said light-emitting element; and said first light and said second light are transmitted through said second phosphor. 12. The light-emitting device defined in claim 6, wherein phosphor nano-particles, having a particle size smaller than a wavelength of said first light, are employed as said second phosphor. 13. A vehicle lamp, comprising: a light-emitting device capable of obtaining a predetermined light source color by of mixing a luminescent color and a fluorescent color, and an optical system for obtaining illumination light through use of said light-emitting device as a light source, wherein said light-emitting device comprises: a light-emitting element for emitting first light including a wavelength range that falls within a visible region; a first phosphor for, upon receipt of said first light or a third light, emitting second light including a wavelength range that differs from that of said first light and third light but falls within a visible region; and a second phosphor for, upon receipt of a specific wavelength component included in external light, generating said third light including a wavelength range that is substantially the same as that of said first light, thereby radiating said first phosphor with said third light. 14. The vehicle lamp defined in claim 13, wherein said first light and said third light have wavelength ranges including blue; and said second light has a wavelength range including yellow. 15. The vehicle lamp defined in claim 13, wherein said second phosphor is excited by ultraviolet light. 16. The vehicle lamp defined in claim 13, wherein said first phosphor and said second phosphor are laminated, in this order, on said light-emitting element; and said first light and said second light are transmitted through said second phosphor. 17. The vehicle lamp defined in claim 13, wherein phosphor nano-particles, having a particle size smaller than a wavelength of said first light, are employed as said second phosphor.
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