Patent ID: 7239082
Filing Date: 2007-07-03
Classification: C09K,H01L,H05B,Y02B

Abstract:
1. An illumination device with at least one LED as the light source, the LED emitting primary radiation in the range from 370 to 430 nm of the optical spectral region (peak wavelength), this radiation being partially or completely converted into radiation of a longer wavelength by three phosphors which are exposed to the primary radiation from the LED and which emit in the blue, green and red spectral regions, so that white light is formed, characterized in that the conversion is achieved at least with the aid of a phosphor which emits blue light with a wavelength maximum at 440 to 485 nm, and with the aid of a phosphor which emits green light with a wavelength maximum at 505 to 550 nm, and with the aid of a phosphor which emits red light with a wavelength maximum at 560 to 670 nm, at least one of said phosphors being selected from one of Tables 1″, 2″ and 3″ below: wherein in M in MF in M**MgAl in MBO in M in MN* in Ca in (Ba, Sr)MgAl in Ln in (Zn, Cd)S:Ag in (M1)