METHOD AND APPARATUS FOR FORMING A LABEL

In an optical disc drive, adapted for forming a label on the label side 14 of a recordable optical disc 10 , a determination of the rotation angle a is provided, so that the marking of the label side 14 can be synchronized upon. The method to determine the rotation angle a is based upon one or two o...

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Bibliographische Detailangaben
Hauptverfasser:	VAN BIJNEN, JOOP, VAN DER KALL, HERMAN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CORRECTION OF TYPOGRAPHICAL ERRORS i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LINING MACHINES PERFORMING OPERATIONS PHYSICS PRINTING SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	In an optical disc drive, adapted for forming a label on the label side 14 of a recordable optical disc 10 , a determination of the rotation angle a is provided, so that the marking of the label side 14 can be synchronized upon. The method to determine the rotation angle a is based upon one or two of the signals 17', 18', 19 ' generated by the Hall-effect elements 17, 18, 19 which are normally present in an optical disc drive and are used to generate the tacho signal 24 . Advantageously, the actual relationship between rotation angle a and the amplitude of these signals is recorded in a calibration procedure, so as to allow for a higher precision of the rotation angle a determined. This calibration procedure may be performed in the factory or by the user, and may not require any additional ad-hoc equipment if a synchronization pattern present in an optical disc is used.