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:
Jul. 20, 2010
Filed:
Nov. 05, 2007
Applicant:
Yasumasa Igi, Osaka, JP;
Inventor:
Yasumasa Igi, Osaka, JP;
Assignee:
Funai Electric Co., Ltd., Daito-shi, Osaka, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B 27/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
Conventional reproducing apparatuses used to perform incorrect detection or consume electricity considerably. According to the present invention, the comparatorcomparing voltages at both ends of the spindle motorand outputting the result is provided, and the control ICjudges whether or not the spindle motoris rotating based on the output from the comparator. Based on this judgment, brake pulses are repeatedly supplied to the spindle motoruntil the spindle motorstops. Based on the number of times the brake pulses are supplied until the spindle motorstops, the presence or absence of an optical disk in the disk drive is determined.