Apparatus and method for detecting optical disc type and/or...

Details Apparatus and method for detecting optical disc type and/or... Apparatus and method for detecting optical disc type and/or...

2007-10-30

2007-10-30

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044250, C369S044320, C369S044350, C369S030130, C369S030140

Reexamination Certificate

active

10706819

ABSTRACT:
Provided are an apparatus and method for detecting a type of an optical disc inserted into an optical disc system and/or adjusting a track balance in the optical disc system by detecting voltages of a focus error signal and a tracking error signal. For detecting a type of an optical disc inserted into an optical disc system, the apparatus comprising: an analog-to-digital converter that converts a focus error signal into n-bit voltage data; and a duty measurer that compares the n-bit voltage data with a positive noise voltage level and a negative noise voltage level, upcounts by a predetermined value if the n-bit voltage data is higher than the positive noise voltage level or lower than the negative voltage level, and outputs the upcounted result as a duty of the focus error signal.

REFERENCES:
patent: 5003521 (1991-03-01), Yoshida et al.
patent: 5748597 (1998-05-01), Kim
patent: 6058082 (2000-05-01), Hwang
patent: 6243341 (2001-06-01), Hasimoto
patent: 6882603 (2005-04-01), Kadlec
patent: 1224216 (1999-07-01), None
patent: 1998-0086187 (1998-12-01), None

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