Title:
LIGHT-EMITTING DEVICE
Document Type and Number:
Japanese Patent JP3708730
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a light-emitting device, wherein phosphor is sufficiently excited by a light of short wavelength of at most 450 nm such as a blue light and UV rays and light emission of high luminance is obtained.
SOLUTION: A GaN based semiconductor laser 1, generating a laser light L1 whose wavelength is at most 450 nm, is used as a light source for optical pumping, and phosphor 2 is so combined that fluorescence L2 in a visible region is generated by excitation of the laser light L1. When a GaN based LED is used as the light source for optical pumping, a recessed part is formed in a laminated body, composed of GaN based crystal layer constituting the LED from the upper surface, the light-emitting part of a light-emitting layer is exposed on the inner side surface of the recessed part, and phosphor is arranged in the recessed part.
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Inventors:
A group of friends
Hiroaki Okakawa
Yoichiro Ouchi
Masahiro Koto
Hiroaki Okakawa
Yoichiro Ouchi
Masahiro Koto
Application Number:
JP34212498A
Publication Date:
October 19, 2005
Filing Date:
December 01, 1998
Export Citation:
Assignee:
Mitsubishi Cable Industries, Ltd.
International Classes:
H01L33/06; H01L33/10; H01L33/14; H01L33/32; H01L33/50; (IPC1-7): H01L33/00
Domestic Patent References:
| JP8063119A | ||||
| JP9064475A | ||||
| JP9129984A | ||||
| JP9153644A | ||||
| JP10041546A | ||||
| JP10163526A | ||||
| JP10303493A | ||||
| JP11168262A | ||||
| JP11204832A | ||||
| JP11204862A |
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