The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 2010
Filed:
Dec. 04, 2008
Junichi Minamino, Nara, JP;
Atsushi Nakamura, Kadoma, JP;
Shigeru Furumiya, Himeji, JP;
Hiromichi Ishibashi, Ibaraki, JP;
Takashi Ishida, Yawata, JP;
Toyoji Gushima, Habikino, JP;
Junichi Minamino, Nara, JP;
Atsushi Nakamura, Kadoma, JP;
Shigeru Furumiya, Himeji, JP;
Hiromichi Ishibashi, Ibaraki, JP;
Takashi Ishida, Yawata, JP;
Toyoji Gushima, Habikino, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An apparatus for reading subdivided information from an optical disk, which comprises a track groove and on which information is recorded along the track groove is disclosed. The apparatus includes an optical head, which irradiates the optical disk with light and generates an electric signal responsive to part of the light that has been reflected from the optical disk, read signal processing means for generating a wobble signal which has an amplitude changing with the wobble pattern from the electric signal, rise value acquiring means for sampling and holding an absolute gradient value of the wobble signal when the signal rises, fall value acquiring means for sampling and holding an absolute gradient value of the wobble signal when the signal falls, and subdivided information detecting means for determining the subdivided information by majority by comparing the values held by the rise and fall value acquiring means with each other.