Production of LEDs emitting white light comprises mounting a UV light LED chip on an electrode, and directly or indirectly applying RGB-mixed phosphor powder on the surface of the chip

摘要

Production of LEDs emitting white light comprises mounting a UV light LED chip (1) having a wire (4) on a frame (3) or packing layer on an electrode, and directly or indirectly applying RGB-mixed phosphor powder on the surface of the chip to excite the phosphor powder to produce a white light by RGB having a three-colored wavelength. Preferred Features: The wavelength of the purple-colored light produced by the chip is 390-410 nm. The packing layer is made from a PCB, a ceramic layer, a silicon layer or a metal layer. The phosphor powder consists of a red phosphor powder of formula: Y2O2S: Eu, Gd, a green phosphor powder of formula: ZnS: Cu, Al or Ca2MgSi2O7: Cl, and a blue phosphor powder of formula: BaMgAl10O17: Eu or (Sr, Ca, Ba, Mg)10(PO4)6Cl2: Eu.