Invention Grant
- Patent Title: Rotation speed control for recording information
- Patent Title (中): 旋转速度控制记录信息
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Application No.: US10521661Application Date: 2003-06-25
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Publication No.: US07800996B2Publication Date: 2010-09-21
- Inventor: Stephanus Josephus Maria Van Beckhoven , Tony Petrus Van Endert , Robert Albertus Brondijk
- Applicant: Stephanus Josephus Maria Van Beckhoven , Tony Petrus Van Endert , Robert Albertus Brondijk
- Applicant Address: NL Eindhoven
- Assignee: Koninklijke Philips Electronics N.V.
- Current Assignee: Koninklijke Philips Electronics N.V.
- Current Assignee Address: NL Eindhoven
- Priority: EP02077985 20020722
- International Application: PCT/IB03/02725 WO 20030625
- International Announcement: WO2004/010430 WO 20040129
- Main IPC: G11B20/10
- IPC: G11B20/10 ; G11B19/02

Abstract:
A disc recording device has a mode control unit for switching the device either to a read mode or to a write mode. Reading and writing can be alternated for simultaneous recording and reproducing of video. A rotation speed control unit sets the rotation speed of the record carrier, and has a speed selector for selecting one of at least two speed settings for the read mode in dependence on an actual rotation speed of the record carrier during the write mode when switching from write mode to read mode. By setting the read speed to one of a limited number of settings the difference in rotation speed between said actual rotation speed and the speed in the read mode is limited. Due to the limited differences power dissipation is limited, while the performance of access time and playability of real-life discs is at a high level.
Public/Granted literature
- US20060072899A1 Rotation speed control for recording information Public/Granted day:2006-04-06
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