LIGHTING SYSTEM

Japanese Patent JP3713815

B2

PROBLEM TO BE SOLVED: To provide a lighting system having correlation with the change of the quantity of light of sunlight, capable of adjusting organism rhythm, and easily maintaining awakening.
SOLUTION: A light receiving part 1 generates a voltage signal having correlation with (proportion to) the quality of light of sunlight. A comparison part 7 of a power control part 2 outputs a control signal of 'H' when reference voltage V0 of a reference wave form generating part 6 is higher than a voltage signal sent from the light receiving part 1. A lighting device 4 sets the lighting power (dimmer degree) of a luminescent load 5 according to the width of the control signal. The lighting device 4 sets lighting power supplied to the luminescent load 5 so that illuminance within a room which a luminescent object varies in proportion to the variation of the receiving quantity of light from sunlight (outside light) according to the width of the input control signal. Or, when the receiving quantity of light is decreased and the width of the control signal is increased, lighting power is decreased and brightness is decreased, and oppositely, when the receiving quantity of light is increased and the width of the control signal is decreased, lighting power is increased and brightness is increased.

Emi Koyama
Yasushi Iwai
Koji Katayama
Shoichi Morii
Norio Nakano
Kei Hagiwara
Takeyuki Imai
Hisami Usui
Masakatsu Niwa

JP13040996A

November 09, 2005

May 24, 1996

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MATSUSHITA ELECTRIC WORKS,LTD.

H05B37/02; (IPC1-7): H05B37/02

JP5121176A
JP7065963A
JP6314595A
JP3283387A
JP54093871A
JP61250995A

Keisei Nishikawa
Atsuo Mori

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