Light emitting device and LED light bulb
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.
Toshiba Materials Co., Ltd.
H F C F Y C Y F C H H H C H F H F C C H F C F
H05B F21Y C09K F21K Y02B C09K Y02B F21K C09K H01L H01L H01L C09K H05B F21Y H05B F21V C09K C09K H01L F21K C09K F21V
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Masahiko Atsuji Toshitaka Tomohiko Hiroyasu Yasuhiro Ryoji
Yamakawa Nakagawa Fujii Inoue Kondo Shirakawa Tsuda