Light emitting device with a non-activated luminescent material

Details Light emitting device with a non-activated luminescent material Light emitting device with a non-activated luminescent material

2007-01-08

2010-12-21

Dickey, Thomas L (Department: 2893)

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

With reflector, opaque mask, or optical element integral...

C257SE31131, C257SE25020

Reexamination Certificate

active

07855393

ABSTRACT:
The invention relates to a light emitting device having a radiation emitting element, for example a light emitting diode, and a luminescent material which is able to absorb a part of the radiation sent out by the radiation emitting element and to send out light with a wavelength which is different from the wavelength of the absorbed radiation. The device further has diffusing particles which are able to scatter a part of the radiation sent out by the radiation emitting element, and/or to scatter a part of the light sent out by the luminescent material. The diffusing particles are of non-activated luminescent material, through which production is simplified.

REFERENCES:
patent: 6747406 (2004-06-01), Bortscheller et al.
patent: 2003/0168669 (2003-09-01), Chua
patent: 2003/0218420 (2003-11-01), Zovko
patent: 2004/0004433 (2004-01-01), Lamnsky et al.
patent: 2004/0046497 (2004-03-01), Schaepkens et al.
patent: 2004/0164311 (2004-08-01), Uemura
patent: 2005/0082574 (2005-04-01), Tasch et al.
patent: 2005/0162069 (2005-07-01), Ota et al.
patent: 2006/0273340 (2006-12-01), Lv
patent: 2007/0120135 (2007-05-01), Soules et al.
International Search Report; PCT/EP2007/000098; Apr. 23, 2007.

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