Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2005-04-12
2005-04-12
Miller, Brian E. (Department: 2652)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053280
Reexamination Certificate
active
06879555
ABSTRACT:
According to the present invention, it is possible to accurately start an optical disc apparatus and to reduce a startup time therefor, and it is possible to securely and accurately reproduce/record information with respect to a plurality of types of optical discs in accordance with the type. According to the present invention, by calculating a threshold value of quantity of reflected light for discriminating the type of optical disc on a basis of a measured value of quantity of reflected light from an optical disc of high reflectivity such as CD-ROM and CD-R and a measured value of quantity of reflected light from an optical disc of low reflectivity such as CD-RW to update the threshold value, the type of the optical disc loaded into the optical disc apparatus is discriminated securely and in short time.
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Translation of JP 11-203691 from JPO website http://www.ipdl.jpo.go.jp/homepg_e.ipdl.*
“Detection of Optical Disk Type,” IBM Technical Disclosure Bulletin, vol. 29, No. 3, Aug. 1986, pp 995-996, IBM Corp. 1986.
Battaglia Michael V.
Matsushita Electric - Industrial Co., Ltd.
Miller Brian E.
Parkhurst & Wendel L.L.P.
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