The invention relates to a light-emitting device comprising a UV diode with a primary emission of 300 nm </= lambda </= 370 nm,and a phosphor layer consisting of a combination of a blue-light emitting phosphor with an emission band of 430 nm </= lambda </= 490 nm, a green-light emitting phosphor with an emission band of 520 nm </= lambda </= 570 nm and a red-light emitting phosphor with an emission band of 590 nm </= lambda </= 630 nm, said device emitting high-quality white light. The colour rendering index CRI is 90 at a colour temperature of 4 000 K. As colour rendering depends only on the composition of the three phosphors and not on the relation of converted to non-converted light it is easyto control and regulate.
申请公布号
DE19756360(A1)
申请公布日期
1998.09.10
申请号
DE19971056360
申请日期
1997.12.18
申请人
PHILIPS PATENTVERWALTUNG GMBH, 22335 HAMBURG, DE
发明人
JUESTEL, THOMAS, DR., 52078 AACHEN, DE;NIKOL, HANS, DR., 52070 AACHEN, DE;RONDA, CEES, DR., 52072 AACHEN, DE
