Patent ID: 6351069
Filing Date: 2002-02-26
Classification: H01L

Abstract:
A light emitting device comprising:light-generating means for emitting first light having a first peak wavelength in a first spectral range in response to an applied excitation signal; wavelength-conversion means optically coupled to said light-generating means to receive said first light for converting a portion of said first light to form composite light having a broadband spectral distribution, said wavelength-conversion means including a primary fluorescent material that converts said first light into second light having a second peak wavelength in a second spectral range, said wavelength-conversion means including a supplementary fluorescent material that converts said first light into third light having a third peak wavelength in a red spectral range of a visible light spectrum, said composite light being at least partially formed by said first light, said second light and said third light such that said broadband spectral distribution includes said first spectral range, said second spectral range and said red spectral range; and means in optical communication with said light-generating means and said wavelength-conversion means for directing said first light, said second light and said third light in a predetermined direction.