Power control device and method of multi base powers for...

Details Power control device and method of multi base powers for... Power control device and method of multi base powers for...

2006-05-09

2010-02-23

Feild, Joseph H (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

07668067

ABSTRACT:
A power control device of multi base powers is provided for an optical read/write module of an optical disk drive. The optical read/write module generates a power feedback signal and a temperature signal. The power control device includes a base power selecting module, a current compensating module, a current computing module and a current integrating module. The base power selecting module selects one of a first base power signal and a second base power signal to output a base power signal. The current compensating module generates an operating current compensating signal and a threshold compensating signal according to the power feedback signal, the temperature signal, the base power signal and a function relationship between the temperature signal and the threshold current of the optical read/write module. The current computing module receives the operating current compensating signal to compute a first operating current signal, a second operating current signal and a third operating current signal based on the operating current compensating signal according to the base power signal and a reference power signal. The current integrating module receives the threshold current compensating signal, the first operating current signal, the second operating current signal and the third operating current signal to generate a power control signal to drive the optical read/write module.

REFERENCES:
patent: 6775216 (2004-08-01), Kelly et al.
patent: 7242660 (2007-07-01), Lai et al.
patent: 2005/0073268 (2005-04-01), Schrodinger et al.
patent: 2006/0164901 (2006-07-01), Lai et al.

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