Optical storage drive controller with predetermined light source

Details Optical storage drive controller with predetermined light source Optical storage drive controller with predetermined light source

1993-02-26

1995-02-21

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369116, G11B 7125

Patent

active

053922735

ABSTRACT:
A control method and controller for an optical storage drive including: an optical head having a laser light source for applying light to an optical disk and a detector for receiving reflected light from the optical disk; and a seek mechanism for positioning the optical head on the optical disk. The control method includes: measuring a drive current value with which the laser light source provides a predetermined light power value by an emission adjustment; writing the measured drive current value into a non-volatile memory as an initial value; adjusting the emission of the laser light source so that it provides the predetermined light power value; and comparing the drive current value with which the emission adjustment has been made with the initial value stored in the non-volatile memory. Also disclosed is a control method which measures and stores a write power value providing optimum write performance in a non volatile memory for controlling the power of the laser light source with the measured value.

REFERENCES:
patent: 5050156 (1991-09-01), Barton
patent: 5172365 (1992-12-01), Call et al.
patent: 5185733 (1993-02-01), Finkelstein et al.
patent: 5185734 (1993-02-01), Call et al.
patent: 5220549 (1993-06-01), Yanagidate
patent: 5233175 (1993-08-01), Latta et al.
patent: 5237558 (1993-08-01), Horikiri et al.
patent: 5321679 (1994-06-01), Horiguchi

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