Laser driving method and device, and recording/reproducing...

Details Laser driving method and device, and recording/reproducing... Laser driving method and device, and recording/reproducing...

2005-01-11

2005-01-11

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular component circuitry

For driving or controlling laser

C372S029010

Reexamination Certificate

active

06842469

ABSTRACT:
In a power supply circuit, a first power-supply voltage supplied to a laser driving circuit for driving a short-wavelength semiconductor laser of an optical pickup is made higher than a second power-supply voltage supplied to circuits except the laser driving circuit, for example, a reproducing system, a servo system and a recording system. Thus, the power consumption in a device for driving a short-wavelength semiconductor laser such as an InGaN-based semiconductor laser is reduced.

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