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Class Information
Number: 369/44.25
Name: Dynamic information storage or retrieval > With servo positioning of transducer assembly over track combined with information signal processing > Optical servo system > Servo signal compared to a reference signal
Description: Subject matter wherein a developed servo signal is compared to an external reference signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7616538 |
Method for setting layer-jump point on optical disc |
Nov. 10, 2009 |
| 7616534 |
Method for determining kind of optical recording medium |
Nov. 10, 2009 |
| 7613081 |
Control of stepper motor in an optical disc |
Nov. 3, 2009 |
| 7613083 |
Optical scanning device |
Nov. 3, 2009 |
| 7596062 |
Method of preventing optical recording media from being fractured and apparatus thereof |
Sep. 29, 2009 |
| 7577063 |
Calibration of a focus offset in an optical drive |
Aug. 18, 2009 |
| 7542383 |
Optical disc assemblies for performing assays |
Jun. 2, 2009 |
| 7525880 |
Near-field information reproducing apparatus and near-field information reproducing method |
Apr. 28, 2009 |
| 7522482 |
Optical pickup device and apparatus for reading data from optical storage medium |
Apr. 21, 2009 |
| 7512042 |
Method of controlling focus of optical disk recording and reproducing device |
Mar. 31, 2009 |
| 7505379 |
Intelligent layer jump method |
Mar. 17, 2009 |
| 7489602 |
Apparatus and method for layer jump braking control in an optical drive |
Feb. 10, 2009 |
| 7480217 |
Method and apparatus for adjusting tracking error balance in an optical disk reproducing apparatus |
Jan. 20, 2009 |
| 7463560 |
Optical disc device |
Dec. 9, 2008 |
| 7460451 |
Information-reproducing apparatus equipped with PLL circuit |
Dec. 2, 2008 |
| 7460455 |
Method for determining relationship between difference of object lens location and driving control effort in optical storage device and apparatus thereof |
Dec. 2, 2008 |
| 7440362 |
Optical disc drive which uses a train of pulses to shift the focus of a focusing section |
Oct. 21, 2008 |
| 7436380 |
Electronic Apparatus with level detecting function |
Oct. 14, 2008 |
| 7433279 |
Layer jump control device and method of high-speed optical drive |
Oct. 7, 2008 |
| 7421359 |
Detecting back electromotive force voltage |
Sep. 2, 2008 |
| 7411876 |
Apparatus and method for controlling tracking in disc drive by monitoring tracking actuator deviation |
Aug. 12, 2008 |
| 7397735 |
Optical disk device capable of preventing collision between disk and objective lens, and control method thereof |
Jul. 8, 2008 |
| 7394741 |
Optical disc reading and reproducing apparatus |
Jul. 1, 2008 |
| 7395462 |
Defect estimation apparatus and related method |
Jul. 1, 2008 |
| 7385886 |
Optical disk drive and method of controlling spindle motor thereof |
Jun. 10, 2008 |
| 7385895 |
Method of discriminating optical disc type and apparatus thereof |
Jun. 10, 2008 |
| 7382698 |
Optical information recording/reproducing apparatus having tilt correction mechanism and method therefor |
Jun. 3, 2008 |
| 7366063 |
Optical discs for measuring analytes |
Apr. 29, 2008 |
| 7349296 |
Write control in response to tracking error |
Mar. 25, 2008 |
| 7345963 |
Method and related apparatus for deriving a tracking error signal |
Mar. 18, 2008 |
| 7345964 |
Method and related apparatus for deriving a tracking error signal |
Mar. 18, 2008 |
| 7342852 |
Method and apparatus for differing focus between at least two dimensions |
Mar. 11, 2008 |
| 7333412 |
Optical recording/reproducing apparatus, focusing method therefor, and optical disk recording medium |
Feb. 19, 2008 |
| 7333405 |
Optical disk device and information recording/reproducing method |
Feb. 19, 2008 |
| 7324418 |
Method and apparatus of determining a type of disc |
Jan. 29, 2008 |
| 7315495 |
High-speed focus pull-in controllers for adaptively responding to disk surface vibration of an optical disk device and focus control methods thereof |
Jan. 1, 2008 |
| 7301859 |
Track error detection device having a function of removing a phase offset, and phase offset removing method thereof |
Nov. 27, 2007 |
| 7295498 |
Disk apparatus and method of generating a tracking error signal |
Nov. 13, 2007 |
| 7295501 |
Apparatus and method for controlling a focus jump and level thereof in a multilayer optical disk |
Nov. 13, 2007 |
| 7289405 |
Apparatus and method for detecting optical disc type and/or adjusting track balance |
Oct. 30, 2007 |
| 7289396 |
Disk device |
Oct. 30, 2007 |
| 7283432 |
Method and device for correcting optical path deviation of an optical pickup in an optical recording system |
Oct. 16, 2007 |
| 7280445 |
Optical pick-up |
Oct. 9, 2007 |
| 7280444 |
Objective optical element, optical pickup device, and optical information recording and reproducing device |
Oct. 9, 2007 |
| 7276680 |
Control unit and optical disk drive including the control unit |
Oct. 2, 2007 |
| 7266056 |
Method of focus position adjustment by controlling a deviation value and system thereof |
Sep. 4, 2007 |
| 7257053 |
Optical disc apparatus |
Aug. 14, 2007 |
| 7257052 |
Control apparatus and optical disk apparatus |
Aug. 14, 2007 |
| 7254099 |
Method and related apparatus for deriving a tracking error signal |
Aug. 7, 2007 |
| 7242646 |
Track locking method for optical disk drive and apparatus |
Jul. 10, 2007 |
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