Fish & Richardson P.C.
Dimming control device, dimming control method and lighting apparatus provided with dimming control device
A lighting apparatus includes an illuminance sensor, a dimming control device and a light source. The lighting apparatus calculates a light output characteristic of the light source based on an illuminance measurement value when the light source is turned off and an illuminance measurement value when the light source is lit with a predetermined output, and calculates an ambient illuminance based on the light output characteristic. The illuminance measurement by the illuminance sensor is performed every predetermined period, and dimming control is performed on the light source based on the calculated ambient illuminance.
Rohm Co., Ltd.
H Y H H
H05B Y02B H05B H05B
inventional additional inventional inventional
Akinobu
Sawada