Light emitting device using phosphor powder

Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type

Reexamination Certificate

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C252S30140R

Reexamination Certificate

active

07868535

ABSTRACT:
The present invention is a light emitting device which uses a specific phosphor powder. The phosphor powder is a combination of cerium (Ce) and lithium aluminum oxide (LiAlO2). They are mixed under a specific range of composition ratio. With the specific phosphor powder applied, the light emitting device has advantages in a low cost, a reduced power consumption, an easy production, a long life, and so on. In addition, a transformation efficiency of the phosphor powder is high and so a light emitting efficiency of the light emitting device is enhanced.

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