ILLUMINATION APPARATUS

PROBLEM TO BE SOLVED: To provide an LED lighting apparatus capable of easily obtaining illuminating light having different color temperatures. SOLUTION: A first light emitting module 13 equipped with a first light source part 17 having LEDs 16 and a second light emitting module 14 equipped with a se...

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Bibliographic Details
Main Authors SAITO AKIKO, OTAKE HIROKAZU, SHIBANO NOBUO, SHIMIZU KEIICHI, NISHIMURA KIYOSHI
Format Patent
LanguageEnglish
Published 15.01.2009
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Summary:PROBLEM TO BE SOLVED: To provide an LED lighting apparatus capable of easily obtaining illuminating light having different color temperatures. SOLUTION: A first light emitting module 13 equipped with a first light source part 17 having LEDs 16 and a second light emitting module 14 equipped with a second light source part 22 having LEDs 21 having a color temperature different from that of the LEDs 16 and having impedance larger than that of the first light source part 17 are connected to a constant current power source 12. Current flowing through the first light emitting module 13 is varied with a current varying means 18. Since the light emitting amounts of the LEDs 16, 21 are made to complementarily vary, illuminating light having different color temperatures can easily be obtained while an output is kept constant. COPYRIGHT: (C)2009,JPO&INPIT
Bibliography:Application Number: JP20070168854