Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2011-08-09
2011-08-09
Simpson, Lixi C (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044270, C369S044290
Reexamination Certificate
active
07995431
ABSTRACT:
The optical disc device has a circuit4which forms a focus error signal FER for focus servo control based on reflection light from an optical disc exposed to laser light. A data processing unit2can control by feedback a position to which an objective lens is moved by a focusing actuator30based on the focus error signal. In label printing, the data processing unit controls, by feedforward, a position to which the objective lens is moved by the focusing actuator based on control data for label printing. The operation resolution of the focusing actuator in feedforward control is made higher than that in feedback control. Thus, an intended position control accuracy is achieved in feedforward control. For instance, in feedforward control, the gain of the driver circuit40for the focusing actuator is switched to a smaller one in comparison to that in feedback control.
REFERENCES:
patent: 6157600 (2000-12-01), Nakamura et al.
patent: 2002/0191517 (2002-12-01), Honda et al.
patent: 2004/0004912 (2004-01-01), Morishima
patent: 2004/0136291 (2004-07-01), Hayashi
patent: 2005/0265208 (2005-12-01), Nakane et al.
patent: 2006/0126453 (2006-06-01), Lipinski et al.
patent: 2006/0144941 (2006-07-01), Pratt
patent: 0986053 (2000-03-01), None
patent: 1517314 (2005-03-01), None
patent: 58-155527 (1983-09-01), None
patent: 58-212631 (1983-12-01), None
patent: 9-16981 (1997-01-01), None
patent: 2003-242669 (2003-08-01), None
patent: 2004-213796 (2004-07-01), None
patent: 2005-93050 (2005-04-01), None
Hagiwara Mitsuo
Iso Yoshimi
Kimura Mitsuyuki
Mattingly & Malur, PC
Renesas Electronics Corporation
Simpson Lixi C
LandOfFree
Optical disc device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical disc device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2691324