Optical disk apparatus, laser power controller, and laser...

Details Optical disk apparatus, laser power controller, and laser... Optical disk apparatus, laser power controller, and laser...

2007-03-05

2010-12-28

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S053370, C369S053290, C369S059110, C369S059100

Reexamination Certificate

active

07859979

ABSTRACT:
A laser power controller includes a loop control section to control a laser light output level of an optical head that applies laser light onto a disk for recording data to be a prescribed value, a DAC control section to hold as a previous level a laser control level preceding switching of a laser output level upon track change between a groove track and a land track during recording, and an analog SW to select the DAC control section to control the laser light output level by the previous level for a certain time period from the track change and to select the loop control section after the certain time period.

REFERENCES:
patent: 6373805 (2002-04-01), Song
patent: 7411890 (2008-08-01), Shin et al.
patent: 4-62518 (1992-05-01), None
patent: 8-180447 (1996-07-01), None
patent: 08180447 (1996-07-01), None
patent: 2003-99935 (2003-04-01), None
patent: 2003099935 (2003-04-01), None

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