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:
Apr. 23, 2013
Filed:
Jan. 06, 2011
Applicants:
Chi-ruei Tsai, Taipei, TW;
Kun-lin Chang, Sanchong, TW;
Chen-pei Hsu, Sanchong, TW;
Wen-sheng Huang, Sanchong, TW;
Inventors:
Chi-Ruei Tsai, Taipei, TW;
Kun-Lin Chang, Sanchong, TW;
Chen-Pei Hsu, Sanchong, TW;
Wen-Sheng Huang, Sanchong, TW;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 1/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lutetium-based phosphor having the chemical formula: xLuAlO.yGdAlO:CePrEuTb, and being capable of radiating reddish orange-red spectrum when activated by a shortwave light emitted by an InGaN light-emitting diode. The invention also discloses a warm white LED using the lutetium-based phosphor that produces orange-red light having the peak wavelength λ>560 nm, half width>125 nm and color rendering index Ra≧75 when activated by the LED radiation λ=420˜500 nm.