Optical disk write/read apparatus and optical disk write method

Details Optical disk write/read apparatus and optical disk write method Optical disk write/read apparatus and optical disk write method

1997-12-30

1999-03-09

Chan, Eddie P.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, G11B 700

Patent

active

058810447

ABSTRACT:
Optical disk write/read apparatus and optical disk write method of the present invention is to generate a RF signal from a strong reflection light of the early stage reflected from the optical disk, to add a compensation signal according to the RF signal to the drive signal of the optical write laser diode, to control the write power of the laser diode, to quickly generate the pit, to make the pit edge sharp, to make it possible to write data on the optical disk by the low write power.
These objects are accomplished by generating the write control signal according to the write signal obtained from encoder and the write power reference which is necessary to generate the pit on the optical disk and is generated by a microcomputer, by generating the write power of the laser diode according to said control signal, by starting writing data on the disk by irradiating the write power on the optical disk and then generating a RF signal from the reflection light of the laser diode reflected from the optical disk, by generating a compensation control signal from said RF signal, and by adding the compensation control signal to said write control signal.

REFERENCES:
patent: 5216660 (1993-06-01), Iimura

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