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:
Mar. 15, 2011
Filed:
Aug. 17, 2009
Yi-qun LI, Danville, CA (US);
Yi Dong, Tracy, CA (US);
Dejie Tao, Fremont, CA (US);
Shifan Cheng, Moraga, CA (US);
Ning Wang, San Jose, CA (US);
Yi-Qun Li, Danville, CA (US);
Yi Dong, Tracy, CA (US);
Dejie Tao, Fremont, CA (US);
Shifan Cheng, Moraga, CA (US);
Ning Wang, San Jose, CA (US);
Intematix Corporation, Fremont, CA (US);
Abstract
Novel green phosphors are disclosed having the comprise silicate-based compounds having the formula (Sr,A)(Si,A)(O,A):Eu, where Ais at least one divalent cation (a 2+ ion) including Mg, Ca, Ba, or Zn, or a combination of 1+ and 3+ cations; Ais a 3+, 4+, or 5+ cation, including at least one of B, Al, Ga, C, Ge, N, and P; Ais a 1−, 2−, or 3− anion, including F, Cl, Br, and S; and x is any value between 1.5 and 2.5, both inclusive. The formula is written to indicate that the Acation replaces Sr; the Acation replaces Si, and the Aanion replaces O. These green phosphors are configured to emit visible light having a peak emission wavelength greater than about 480 nm. They have applications in green illumination systems, red-green-blue backlighting systems, white LEDs, and plasma display panels (PDPs).