Fitzpatrick, Cella, Harper & Scinto
Image forming apparatus and constant current circuit switching device for use therewith
 A driver IC for driving a light source comprises means for generating a constant current, switching means for switching the constant current supplied to the light source, first input terminal for inputting a first signal to modulate a light emitted by the light source, said switching means performing a switching operation in accordance with the first signal, and second input terminal for inputting a second signal so as to supply the constant current to the light source, irrespective of the first signal. 
Canon Kabushiki Kaisha
H G H H
H01S G06K H01S H01S
additional inventional inventional inventional
Hiroyuki Yukihide Makoto Shimpei Akio Kazuro Seiji Yoji
Nakamura Ushio Takeuchi Matsuo Noguchi Yamada Uchiyama Serizawa