Recording device and method, reproducing device and method,...

Details Recording device and method, reproducing device and method,... Recording device and method, reproducing device and method,...

2006-04-06

2010-12-28

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053190, C369S053230

Reexamination Certificate

active

07859965

ABSTRACT:
A recording device (1T or the like) is provided with (i) recording elements (50, 40) for recording data by irradiating a recording medium with laser beams; (ii) driving members (33T,33F,55T,55F,54) for performing tracking process or focusing process; (iii) a servo elements (31T,31F) for automatically controlling the driving members based on an error signal; (iv) specifying elements (21, 22) for specifying an area where a recording medium characteristic (core eccentricity or the like) is not good, based on a high frequency component included in the error signal; and (v) a control unit (10) for (v-i) controlling the servo unit to change the gain in the automatic control, and for (v-ii) controlling the recording elements to change the recording power of the laser beams, in the specified area.

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