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:
Mar. 08, 2011
Filed:
Apr. 08, 2008
Johannes Leopoldus Bakx, Eindhoven, NL;
Maarten Kuijper, Eindhoven, NL;
Johannes Franciscus Petrus Claas, Eindhoven, NL;
Petrus Antonius Verbeek, Eindhoven, NL;
Johannes Leopoldus Bakx, Eindhoven, NL;
Maarten Kuijper, Eindhoven, NL;
Johannes Franciscus Petrus Claas, Eindhoven, NL;
Petrus Antonius Verbeek, Eindhoven, NL;
Lite-On It Corporation, Taipei, TW;
Abstract
An optical disk drive and a method for determining a disk type are described. The optical disk drive may be arranged to receive a radial error signal while an incident beam is focused onto the optical disk and before tracking the track, to analyze the radial error signal for detecting whether a wobble signal is present, indicating whether the track is wobbled, and to derive a disk type from the wobble signal, if present. The optical disk drive may additionally or alternatively be arranged to receive a central aperture signal while the incident beam is focused onto the optical disk and before tracking a track including a sequence of embossed pits, to analyze the signal amplitude of the central aperture signal, and to determine the disk type from at least a first variation of the signal amplitude of the central aperture signal as a function of time.