The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2008
Filed:
Apr. 13, 2004
Yongchi Tian, Princeton, NJ (US);
Diane Zaremba, Fairless Hills, PA (US);
Perry Niel Yocom, Washington Crossing, PA (US);
Yongchi Tian, Princeton, NJ (US);
Diane Zaremba, Fairless Hills, PA (US);
Perry Niel Yocom, Washington Crossing, PA (US);
Sarnoff Corporation, Princeton, NJ (US);
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 SrCaGaS: yEu·zGaS, where x is 0.0001 to 1, y is a value defining sufficient Euto provide luminescent emission, and z is 0.0001 to 0.2 based on the mole amount of SrCaGaS, and where the wavelength transformer effectively increases the light at the light output, the light having a wavelength between 535 nm and 560 nm.