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1. (WO2006118389) PREPARATION OF WHITE LIGHT EMITTING DIODE USING A PHOSPHOR

Pub. No.:    WO/2006/118389    International Application No.:    PCT/KR2006/001558
Publication Date: Nov 9, 2006 International Filing Date: Apr 25, 2006
IPC: H01L 33/50
H01L 33/62
Applicants: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY
PARK, Joung Kyu
KIM, Chang Hae
KIM, Kyung Nam
KIM, Jae Myung
CHOI, Kyoung Jae
Inventors: PARK, Joung Kyu
KIM, Chang Hae
KIM, Kyung Nam
KIM, Jae Myung
CHOI, Kyoung Jae
Title: PREPARATION OF WHITE LIGHT EMITTING DIODE USING A PHOSPHOR
Abstract:
The present invention relates to a method for preparing a white light emitting diode (LED) using phosphors, especially to a white light emitting diode prepared by applying a tri-color phosphor material mixture of red, blue and green on a UV LED chip made of a packaging substrate, where white light is obtained by transmitting light through the tri-color phosphor mixture since the UV LED chip emits purple light. In particular, the present invention relates to a white light emitting diode prepared by laminating green and red or yellow and red phosphor materials on a blue LED chip, where white light is obtained as light is transmitted and absorbed by the phosphors. The method in accordance with the present invention is advantageous in that a white light emitting diode having superior photoluminescence efficiency can be provided using a single chip.