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:
Jun. 17, 2008
Filed:
Oct. 18, 2002
Jacobus Petrus Josephus Heemskerk, Eindhoven, NL;
Cornelis Marinus Schep, Eindhoven, NL;
Aalbert Stek, Eindhoven, NL;
Hiromichi Ishibashi, Ibaraki, JP;
Shigeru Furumiya, Himeji, JP;
Shoei Kobayashi, Tokyo, JP;
Jun Nakano, Tokyo, JP;
Jacobus Petrus Josephus Heemskerk, Eindhoven, NL;
Cornelis Marinus Schep, Eindhoven, NL;
Aalbert Stek, Eindhoven, NL;
Hiromichi Ishibashi, Ibaraki, JP;
Shigeru Furumiya, Himeji, JP;
Shoei Kobayashi, Tokyo, JP;
Jun Nakano, Tokyo, JP;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Sony Corporation, Tokyo, JP;
Abstract
An optical disc mediumhaving a wobbled track grooveincludes three wobble patterns including a flat wobble pattern, a positive pulse wobble pattern, and a negative pulse wobble pattern. In the flat wobble pattern, the amplitude of the wobble from the lengthwise direction of the track groove is zero such that the track groove is flat. In the positive pulse wobble pattern, the amplitude of the wobble from the length-wise direction of the track groove is positive such that the track groove is wobbled in a first direction perpendicular to the length-wise direction. Further, in the negative pulse wobble pattern, the amplitude of the wobble from the lengthwise direction of the track groove is negative such that the track groove is wobbled in a second direction opposite to the first direction. Then, three data values can be recorded using three distinctive wobble patterns.