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. 21, 2006
Filed:
Apr. 28, 2004
Yoshihiro Kanda, Toyono-gun, JP;
Mitsurou Moriya, Ikoma, JP;
Mitsuteru Fujimoto, Saijou, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An optical disc that has a recognition mark area behind a recorded area and in which the last data in the recorded area is stably accessed, the recognition mark area can be accessed without bringing about an abnormal state, and the first data in a succeeding recorded area, if it exists, is stably accessed. An unrecorded area () is provided outside the recorded area () of the optical disc (). A mark area () is provided between the recorded area () and unrecorded area (). A recognition mark area () is provided in the mark area () in order to recognize the boundary between the recorded area () and the unrecorded area (). In the mark area (), first and second buffer areas (and) are provided respectively in front of and behind the recognition mark area (). The width of the first buffer area () is preset to be wider than the access error when the last data () in the recorded area () is accessed, and the width of the second buffer area () is preset to be wider than the access error when the recognition mark area () is accessed.