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. 17, 2003
Filed:
Nov. 22, 2000
Thomas Frederick Soules, Richmond Heights, OH (US);
William Winder Beers, Chesterland, OH (US);
Alok Mani Srivastava, Schenectady, NY (US);
Lionel Monty Levinson, Niskayuna, NY (US);
Anil Raj Duggal, Niskayuna, NY (US);
General Electric Company, Niskayuna, NY (US);
Abstract
The invention relates to a light source comprising a phosphor composition and a light emitting device such as an LED or a laser diode The phosphor composition absorbs radiation having a first spectrum and emits radiation having a second spectrum and comprises at least one of: YBO :Ce ,Tb ; BaMgAl O :Eu ,Mn ; (Sr,Ca,Ba)(Al,Ga) S :Eu ; and Y Al O —Ce ; and at least one of: Y O S:Eu ,Bi ; YVO :Eu ,Bi ; SrS:Eu ; SrY S :Eu ; CaLa S :Ce ; and (Ca,Sr)S:Eu . The phosphor composition and the light source together can produce white light with pleasing characteristics, such as a color temperature of 3000-6500° K, a color rendering index of about 83-87, and a device luminous efficacy of about 10-20 lumens per watt.