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. 09, 2009
Filed:
Dec. 14, 2005
Toshihiro Yamashiro, Kanagawa, JP;
Toshihiro Yamashiro, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An access method for use when switching from recording into an optical disk to reproduction from the optical disk or vice versa is disclosed that comprises a step of calculating a rotating speed nof a motor for rotating the optical disk given that linear velocities in a first access position before the switching and a second access position after the switching are equal, a step of determining whether nsatisfies a pair of expressions n>nand n>nor a pair of expressions n<nand n<nwhere nand nare rotating speeds of the motor before and after the switching, a step of changing a control mode from CLV to CAV and the rotating speed from nto nif one of the pairs of expressions is satisfied, and a step of shifting a position to be accessed from the first access position to the second access position.