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:
Oct. 23, 2012
Filed:
Feb. 08, 2011
Keita Takanashi, Ome, JP;
Noriyuki Hiramatsu, Higashimurayama, KR;
Toru Kajino, Kodaira, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Sanyo Optec Design Co., Ltd., Tokyo, JP;
Abstract
An optical pickup apparatus includes: a circuit board; a laser diode mounted on one face of the circuit board; and a high-frequency superimposition integrated circuit arranged on the other face of the circuit board, the high-frequency superimposition integrated circuit including a high-frequency signal generation circuit, the circuit board having an area greater than or equal to an area occupied by a lead pin of the laser diode and a region smaller than or equal to twice a region where the laser diode is mounted, a high-frequency signal generated from the high-frequency signal generation circuit being superimposed on a driving signal to be supplied to the laser diode, in order to take a measure against noise caused by return light of the laser diode.