A light emitting device includes: a first white light source which includes N pieces of first white light emitting diodes and emits a first white light; and a second white light source which includes M pieces of second white light emitting diodes and a first resistance element electrically connected in series to the second white light emitting diodes and having a first resistance value, is electrically connected in parallel to the first white light source, and emits a second white light, the light emitting device emitting a mixed white light of the first white light and the second white light. The drive voltage of the first white light source is higher than a drive voltage of the second white light source, and a color temperature of the mixed white light is higher as a total luminous flux of the mixed white light is higher.
申请公布号
EP3122160(A1)
申请公布日期
2017.01.25
申请号
EP20150764967
申请日期
2015.03.18
申请人
Toshiba Materials Co., Ltd.;Phoenix Electric Co., Ltd.