Yellow light emitting Ce 3+ -activated silicate phosphor...

Details Yellow light emitting Ce 3+ -activated silicate phosphor... Yellow light emitting Ce 3+ -activated silicate phosphor...

2011-04-19

2011-04-19

Won, Bumsuk (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S498000, C252S30140F

Reexamination Certificate

active

07928648

ABSTRACT:
The present invention relates to a phosphor and a white LED, more particularly, to a method for fabricating a yellow emitting Ce3+-activated silicate phosphor with a new composition represented as (Sr1-y-zMyNz)3-xSiO5:Ce3+x, (0<x≦0.3, M includes at least one selected from alkaline earth metals on the periodic table, 0≦y≦1, N is at least one selected from alkali metals on the periodic table and 0≦z≦0.3) and a preparation method thereof and an LED using the same. The phosphor according to the present invention shows a broad band emission when it is excited by the existing InGaN-based blue LED and GaN-based ultraviolet LED with long wavelength. The LED using the phosphor according to the present invention has a broad emission with a wide spectral range and good color purity and very high light emitting efficiency when is applied to a LED and a backlight source of a liquid crystal display.

REFERENCES:
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patent: 7781953 (2010-08-01), Su
patent: 7838896 (2010-11-01), Su et al.
patent: 2005/0062417 (2005-03-01), Okuyama et al.
patent: 2006/0261309 (2006-11-01), Li et al.
patent: 2007/0114548 (2007-05-01), Setlur et al.
patent: WO 2007035026 (2007-03-01), None

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