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:
Jun. 10, 2003
Filed:
May. 25, 2001
Applicant:
Inventors:
Masanori Shimizu, Kyoto, JP;
Yoko Shimomura, Nara, JP;
Tetsushi Tamura, Osaka, JP;
Hideo Nagai, Osaka, JP;
Nobuyuki Matsui, Kyoto, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 4/116 ; F21S 4/00 ; H01L 2/920 ;
U.S. Cl.
CPC ...
H05B 4/116 ; F21S 4/00 ; H01L 2/920 ;
Abstract
An LED lamp includes blue and red LEDs and a phosphor. The blue LED produces an emission at a wavelength falling within a blue wavelength range. The red LED produces an emission at a wavelength falling within a red wavelength range. The phosphor is photoexcited by the emission of the blue LED to exhibit a luminescence having an emission spectrum in an intermediate wavelength range between the blue and red wavelength ranges.
Published as:
EP1160883A2; CN1326230A; US2002070681A1; US6577073B2; TW594828B; EP1160883A3; CN1255881C; EP1160883B1; EP3312890A1;