Methods and devices using high efficiency alkaline earth...

Details Methods and devices using high efficiency alkaline earth... Methods and devices using high efficiency alkaline earth...

2008-05-06

2008-05-06

Cano, Milton I. (Department: 1794)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S917000, C427S066000, C427S067000, C252S30140S, C313S112000, C257S080000, C257S098000

Reexamination Certificate

active

07368179

ABSTRACT:
The present invention provides a light emitting device comprising: a light output; a light source that produces light having a wavelengths of 530 nm or less; and a wavelength transformer located between the light source and the light output, where the wavelength transformer comprises Sr1-xCaxGa2S4: yEu2+·zGa2S3, where x is 0.0001 to 1, y is a value defining sufficient Eu2+to provide luminescent emission, and z is 0.0001 to 0.2 based on the mole amount of SrxCa1-xGa2S4, and where the wavelength transformer effectively increases the light at the light output, the light having a wavelength between 535 nm and 560 nm.

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