Invention Grant
- Patent Title: Optical disc drive apparatus and optical disc reproduction method using the same
- Patent Title (中): 光盘驱动装置及使用其的光盘再生方法
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Application No.: US12089172Application Date: 2006-10-04
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Publication No.: US08111599B2Publication Date: 2012-02-07
- Inventor: Shigeru Furumiya
- Applicant: Shigeru Furumiya
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2005-290692 20051004
- International Application: PCT/JP2006/319860 WO 20061004
- International Announcement: WO2007/043406 WO 20070419
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An optical disc drive apparatus (100) of the present invention rotates an optical disc (1) at a predetermined rotation speed using a motor (2). An optical pickup (3) irradiates the optical disc (1) with a laser beam (5) emitted from an internal semiconductor laser (4) included therein, and obtains a reproduction signal (7) based on a laser beam reflected from the optical disc (1). A laser driving unit (8) controls a driving current (9) of the semiconductor laser (4) to a predetermined level, and superimposes a high-frequency current (11) having a predetermined level on the driving current (9). In a high-speed reproduction mode, a control unit (12) sets the rotation speed of the optical disc (1) higher, the power of the laser beam (5) irradiating the optical disc (1) higher, and the level of the high-frequency current (11) lower than in a normal reproduction mode.
Public/Granted literature
- US20100172230A1 OPTICAL DISC DRIVE APPARATUS AND OPTICAL DISC REPRODUCTION METHOD USING THE SAME Public/Granted day:2010-07-08
Information query
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