摘要 |
PROBLEM TO BE SOLVED: To provide a light adjusting control method adjusting brightness of an illumination system and an illumination system using above. SOLUTION: The illumination system contains an input device, a light-emitting device and a current control circuit. The light adjusting control method is to output consecutive current changing an amplitude to the light-emitting device under higher brightness, and also, to output inconsecutive current clamping an amplitude of output current at a fixed value to the light-emitting device, with the amplitude fixed and with a changing duty cycle to the light-emitting device under lower brightness. COPYRIGHT: (C)2005,JPO&NCIPI |