Write power control method, write power control apparatus...

Details Write power control method, write power control apparatus... Write power control method, write power control apparatus...

2007-07-03

2007-07-03

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal processing for controlling recording light...

C369S047530

Reexamination Certificate

active

10654936

ABSTRACT:
A write power control method of controlling a recording pulse of a laser diode. The method including the steps of: setting, to a target value, a measured value corresponding to an optimum write power determined in an optimum write power determining process performed before recording information; comparing the target value with an output level measured in power control; and controlling an erase power to approach the target value based on a result of the comparison. The recording pulse is a multi-pulse defined by a peak power, the erase power, and a bottom power; and the erase power, at a time when the multi-pulse is not being output, is used in the step of controlling the erase power.

REFERENCES:
patent: 5956313 (1999-09-01), Maegawa et al.
patent: 7019273 (2006-03-01), Yokoi
patent: 2002/0191506 (2002-12-01), Okamoto et al.
patent: 2000-30276 (2000-01-01), None

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