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:
Jan. 02, 2007
Filed:
Apr. 25, 2003
Toshikazu Hosobuchi, Tokyo, JP;
Takashi Namioka, Tokyo, JP;
Yasufumi Takasugi, Tokyo, JP;
Kazuo Fukunaga, Tokyo, JP;
Giichi Shibuya, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Kazuki Suzawa, Tokyo, JP;
Toshikazu Hosobuchi, Tokyo, JP;
Takashi Namioka, Tokyo, JP;
Yasufumi Takasugi, Tokyo, JP;
Kazuo Fukunaga, Tokyo, JP;
Giichi Shibuya, Tokyo, JP;
Hideki Hirata, Tokyo, JP;
Kazuki Suzawa, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
It is an object of the present invention to provide an apparatus for discriminating an optical recording medium which can reliably discriminate the kind of an optical recording medium even in the case where the optical recording medium to be discriminated is warped and formed with periodical undulation in the circumferential direction thereof. The apparatusfor discriminating an optical recording medium according to the present invention includes a first electrodea second electrodea third electrodea fourth electrodean alternating current signal generation circuitfor applying an alternating current signal A to the first electrodeand the third electrodea detection circuitfor detecting the level of an alternating current signal Bappearing at the second electrodeand the level of an alternating current signal Bappearing at the fourth electrodea supporting mechanismfor supporting the first electrodeand the second electrodea supporting mechanismfor supporting the third electrodeand the fourth electrodea driving mechanismfor vertically moving the supporting mechanisma driving mechanismfor vertically moving the supporting mechanismand a control circuitfor controlling the operations of the alternating current signal generation circuitthe detection circuitthe driving mechanismand the driving mechanismand a tableis provided in the control circuit