Method of making pure white light source

Details Method of making pure white light source Method of making pure white light source

2009-03-23

2011-12-06

Lin, James (Department: 1715)

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

Reexamination Certificate

active

08071159

ABSTRACT:
The present invention provides a method of making pure white light source. A phosphor powder which at least comprises three elements Zn, Se, and O is used for being excited by a purple-LED to emit pure red light (650 nm). The phosphor powder is coated on the purple-LED (Ex. chromaticity coordinate of x:0.26, y:0.10), and then placed aside a pure green-LED (or chip), when the purple-LED and the green-LED are electrified, a pure white light source with high color rendering index and high color saturation is obtained.

REFERENCES:
patent: 2007/0159064 (2007-07-01), Choi et al.
patent: 2008/0151527 (2008-06-01), Ueno et al.
patent: 2009/0176430 (2009-07-01), Wang
patent: 2007-5549 (2007-01-01), None
patent: WO 2006-131924 (2006-12-01), None

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