Invention Grant
- Patent Title: Optical disc device and disc identification method
- Patent Title (中): 光盘设备和光盘识别方法
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Application No.: US12952416Application Date: 2010-11-23
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Publication No.: US08259548B2Publication Date: 2012-09-04
- Inventor: Shuichi Minamiguchi , Hiroharu Sakai , Hajime Nishimura
- Applicant: Shuichi Minamiguchi , Hiroharu Sakai , Hajime Nishimura
- Applicant Address: JP Tokyo
- Assignee: Hitachi-LG Data Storage, Inc.
- Current Assignee: Hitachi-LG Data Storage, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2009-294151 20091225
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
To identify the type of a loaded disc, there is provided an optical disc device, comprising: a light source driven by a drive signal with a high frequency signal superimposed; a detector for detecting return light emitted from the light source; and a controller for controlling the amplitude of the high frequency signal to be superimposed on the drive signal, the optical disc device being configured to read data from an optical disc loaded therein by a signal outputted from the detector, wherein: the controller causes the light source to irradiate the loaded optical disc with light in a condition in which a high frequency signal different from a high frequency signal for data reading is superimposed on the drive signal; and the controller identifies a type of the loaded optical disc based on the return light from the loaded optical disc.
Public/Granted literature
- US20110158074A1 OPTICAL DISC DEVICE AND DISC IDENTIFICATION METHOD Public/Granted day:2011-06-30
Information query
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