Patent ID: 6396858
Filing Date: 2002-05-28
Classification: H01S

Abstract:
A laser driving method for driving a plurality of laser emitting means, the laser driving method comprising the following steps:a step of always generating a first current to be supplied to each of the plurality of laser emitting means; a step of generating a plurality of second currents controlled according to a control signal supplied from the outside, when necessary; a step of supplying said plurality of second currents to the respective laser emitting means under supply of the respective first currents, thereby making the laser emitting means emit respective laser beams; a step of making said plurality of laser emitting means emit the laser beams in time division at predetermined timing, and detecting each of emitted light amounts by one laser monitor means; a step of adjusting at least one of the first current and the second current supplied to each of said plurality of laser emitting means according to a plurality of detected light amounts detected; and a step of stopping supply of the current to the laser emitting means not driven when said plurality of laser emitting means are adjusted in light amount in time division.