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:
Sep. 21, 2004
Filed:
Oct. 17, 2002
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 1/62 ; H01J 6/304 ; C09K 1/100 ;
U.S. Cl.
CPC ...
H01J 1/62 ; H01J 6/304 ; C09K 1/100 ;
Abstract
The phosphor composition for low-pressure gas discharge lamps with a high light efficiency for generating radiation with a color temperature of greater than 5000 K and a very good general color rendering index Ra of greater than 90 includes at least one halophosphate phosphor, a phosphor which emits in the red wavelength region and a phosphor which emits in the blue-green wavelength region. In addition, according to the invention the phosphor composition contains an Eu-doped barium magnesium aluminate phosphor BaMgAl O :Eu and a Tb-doped green-emitting phosphor.