Patent ID: 7138757
Filing Date: 2006-11-21
Classification: C09K,H01J,Y02B

Abstract:
1. A high lumen output compact fluorescent lamp having a luminous efficiency of 40 lumen/W or higher, comprising an envelope enclosing a discharge space, means for providing a discharge in the discharge space, a discharge gas sealed in the discharge space, a fluorescent layer made of a phosphor blend coated on the inner surface of said envelope, the phosphor blend comprising 55 to 65 weight % of a first phosphor which is (Sr,Mg) 5 to 30 weight % of a second phosphor having an emission band with a maximum between 605 nm and 615 nm and having a half-value width of 1 nm to 10 nm, 2 to 10 weight % of a third phosphor which is LaPO 0 to 30 weight % of a fourth phosphor having an emission band with a maximum between 480 nm and 500 nm and having a half-value width of 50 nm to 80 nm, said lamp having an R