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:
Apr. 28, 2020
Filed:
Jul. 09, 2018
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Memory-tech Holdings Inc., Tokyo, JP;
Hirohisa Yamada, Sakai, JP;
Takayuki Naka, Sakai, JP;
Masaki Yamamoto, Sakai, JP;
Yoshihisa Adachi, Sakai, JP;
Hideharu Tajima, Sakai, JP;
Masahito Konishi, Chikusei, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
MEMORY-TECH HOLDINGS INC., Tokyo, JP;
Abstract
An optical disk () of the present invention includes (i) a medium information region () (a) in which type identification information is recorded by recesses and/or protrusions which are formed by a given modulation method and whose lengths are longer than a length of an optical system resolution limit of a playback device and (b) in which first address information is recorded in a first address data format and (ii) a data region () (a) in which content data is recorded by recesses and/or protrusions which are formed by the given modulation method and which include a recess and/or a protrusion whose length is shorter than the length of the optical system resolution limit and (b) in which second address information is recorded in a second address data format.