Optical disk differentiating method and electronic device...

Details Optical disk differentiating method and electronic device... Optical disk differentiating method and electronic device...

2006-02-22

2010-02-09

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S094000

Reexamination Certificate

active

07660221

ABSTRACT:
An optical disk differentiating method applied to an optical disk drive, in which a first level value, a second level value and an optical disk differentiating value generating program are stored and an optical disk is put. The method comprises the steps of: generating a laser beam impinging on the optical disk; generating a first reflex signal when the laser beam is reflected by a surface of the optical disk; generating a second reflex signal when the laser beam is reflected by a reflex layer of the optical disk; calculating a first time frame value when the first reflex signal is greater than or equal to the first level value, and rendering a first beginning time value when the first reflex signal firstly equals the first level value; enabling the optical drive to obtain an optical disk differentiating value according to the first time frame value and the optical disk differentiating value generating program; calculating a second beginning time value as the second reflex signal firstly equals the second level value; calculating a difference between the second beginning time value and the first beginning time value and defining the difference as a response time value; and comparing the response time value with the optical disk differentiating value to determine a type of the optical disk.

REFERENCES:
patent: 7149169 (2006-12-01), Juan et al.
patent: 2003/0099171 (2003-05-01), Ito
patent: 2005/0047300 (2005-03-01), Ono et al.

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