Invention Grant
- Patent Title: Optical information recording medium
- Patent Title (中): 光信息记录介质
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Application No.: US13058805Application Date: 2009-08-10
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Publication No.: US08305852B2Publication Date: 2012-11-06
- Inventor: Isao Matsuda , Hironobu Shimizu
- Applicant: Isao Matsuda , Hironobu Shimizu
- Applicant Address: JP Tokyo
- Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee: Taiyo Yuden Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Law Office of Katsuhiro Arai
- Priority: JP2008-212454 20080821
- International Application: PCT/JP2009/064372 WO 20090810
- International Announcement: WO2010/021305 WO 20100225
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
Disclosed is an optical information recording medium that can solve a problem that a BCA mark becomes unrecognizable in an optical recording medium including a recording layer using an organic coloring matter. A playback signal in a burst cut area comprises a bright-area amplitude level formed upon the playback of a part where no barcode-shaped mark has been formed, a dark-area amplitude level formed upon the playback of a part where a barcode-shaped mark has been formed, and a maximum amplitude level having a protruded waveform formed upon the reproduction of the edge of a barcode-shaped mark. When a portion intermediate between the maximum amplitude level and the dark-part amplitude level is defined as an intermediate level, the intermediate level is lower than the bright-area amplitude level.
Public/Granted literature
- US20110134745A1 OPTICAL INFORMATION RECORDING MEDIUM Public/Granted day:2011-06-09
Information query
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