Light-emitting element driving device

Details Light-emitting element driving device Light-emitting element driving device

2005-11-22

2005-11-22

Wong, Don (Department: 2821)

Coherent light generators

Particular component circuitry

For driving or controlling laser

C372S029011, C372S029012, C372S029015, C372S038070, C315S149000, C315S169300, C315S224000, C315S291000, C315S307000

Reexamination Certificate

active

06967978

ABSTRACT:
In a semiconductor laser driving device using a voltage drive system, a drive current of a semiconductor laser is controlled by a drive current control circuit so that a light intensity of light beam emitted from the semiconductor laser is equal to a predetermined light intensity. In a drive voltage control circuit, the drive voltage applied to the semiconductor laser at the time of switching off the semiconductor laser LD is set on the basis of the detected voltage (terminal voltage).

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patent: 09-272223 (1997-10-01), None
patent: A 9-272223 (1997-10-01), None
patent: 2001-36186 (2001-02-01), None
patent: A 2001-36186 (2001-02-01), None

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