Light emitting device

Details Light emitting device Light emitting device

2007-04-03

2007-04-03

O'Shea, Sandra (Department: 2875)

Illumination

Light source and modifier

Including selected wavelength modifier

C362S300000, C362S311040, C362S600000

Reexamination Certificate

active

10954184

ABSTRACT:
A fluorescent structure is provided on a curved recess plane of a reflector. The fluorescent structure has a shape of a cylinder which is cut by a plane including its central axis and along its longitudinal direction. An inner wall of the fluorescent structure tapers in like a cone from both ends to the central portion of the fluorescent structure. The structure includes a fluorescent material, for example YAG, which converts blue light to white light and diffuses the white light. Blue LEDs are provided close to both ends of the structure. The blue LEDs are positioned such that blue light emitted from the blue LED enters from both ends and is led to the central portion.

REFERENCES:
patent: 3356839 (1967-12-01), Mineo et al.
patent: 5155635 (1992-10-01), Kakiuchi
patent: 6522487 (2003-02-01), Memezawa et al.
patent: 6598998 (2003-07-01), West et al.
patent: 6603519 (2003-08-01), Fukiharu
patent: 2002-148686 (2002-05-01), None

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