Patent ID: 9711665
Date: 2017-07-18
CPC Classifications: C09K,F21V,G02B,H01L,Y02E,Y10T

Claim:
1. An illumination device, comprising: an LED; and a color converter, wherein the color converter comprises: at least one layer comprising at least one organic fluorescent colorant, the at least one organic fluorescent colorant embedded into a matrix of an organic polymer which is polystyrene, polycarbonate, polymethyl methacrylate, polyvinylpyrrolidone, polymethacrylate, polyacrylate, polyvinyl acetate, polybutene or polyethylene glycol; and at least one barrier layer having a low permeability to oxygen of less than 100 mL/m wherein the at least one barrier layer is selected from the group consisting of a glass, quartz, a metal oxide, SiO wherein the at least one organic fluorescent colorant is selected from the group consisting of: wherein R X represents a substituent in an ortho, para, or both ortho and para positions and is a linear or branched C y is a number from 0 to 3; wherein the at least one layer comprising the at least one organic fluorescent colorant is surrounded on all sides by the at least one barrier layer having a low permeability to oxygen; wherein the LED and the color converter are present in a remote phosphor structure; wherein air, noble gases, nitrogen or other gases or mixtures thereof are present between the color converter and the LED; and wherein the distance between the LED and the color converter is from 0.1 to 10 cm.