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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:
1 2 3 4 5 6 7 8 9 10 11

Patent Number Title Of Patent Date Issued
8659983 Blu-ray optical pick-up devices and methods Feb. 25, 2014
8582402 Optical recording medium and recording device Nov. 12, 2013
8559282 Average servo control method and system, and target level determination method applied in thereof Oct. 15, 2013
8553508 Focus servo control device, and information recording/reproducing device using the same Oct. 8, 2013
8553515 System and method for precise servoing Oct. 8, 2013
8547812 Optical disc device and method for setting playback power of optical disc device Oct. 1, 2013
8547809 Optical disk device Oct. 1, 2013
8537647 Recording apparatus Sep. 17, 2013
8514676 Method and device for sensitivity compensation Aug. 20, 2013
8509041 Recording apparatus and recording method Aug. 13, 2013
8446802 Optical drive device and focus servo control method May. 21, 2013
8441899 Method and apparatus for compensating periodic signal May. 14, 2013
8427932 Optical recording medium and optical recording-reading method Apr. 23, 2013
8363518 Disk drive Jan. 29, 2013
8363516 Method and apparatus for compensating astigmatism in an optical storage system Jan. 29, 2013
8339908 Optical recording-reading method and optical recording medium Dec. 25, 2012
8315131 Optical disc apparatus and back off control method for objective lens Nov. 20, 2012
8305851 Optical disk apparatus Nov. 6, 2012
8289819 Information reproducing apparatus and information reproducing method Oct. 16, 2012
8284642 Optical disk apparatus Oct. 9, 2012
8284641 Optical disc apparatus Oct. 9, 2012
8270266 Methods and devices for detecting wobbles on an optical disc Sep. 18, 2012
8254221 Circuit for generating tracking error signal Aug. 28, 2012
8189441 Method of recognizing track pitch of optical disk May. 29, 2012
8184519 Optical pickup apparatus May. 22, 2012
8179752 Optical disc apparatus therefor May. 15, 2012
8179751 Method and device for sensitivity compensation May. 15, 2012
8169459 Compensation method in radial direction on label side of optical disc May. 1, 2012
8149670 Optical disk apparatus and method of driving the same Apr. 3, 2012
8149668 Optical disk drive and method for determining disk type Apr. 3, 2012
8134895 Circuit for generating tracking error signal Mar. 13, 2012
8130605 Driving device and method, program, and recording medium Mar. 6, 2012
8125862 System and method for controlling tracking in an optical drive Feb. 28, 2012
8111604 Fabrication method of multilayer optical record medium and recording apparatus for multilayered optical record medium Feb. 7, 2012
8107335 Method and apparatus for recording and reproducing information on and from optical disc Jan. 31, 2012
8094527 Optical disk apparatus Jan. 10, 2012
8094532 Interlayer movement apparatus, and integrated circuit for interlayer movement apparatus Jan. 10, 2012
8085628 Focus servo controlling method and apparatus and optical disk drive using the focus servo controlling method Dec. 27, 2011
8081543 Optical disc apparatus and focus control method Dec. 20, 2011
8077574 Drive device and method for controlling the same Dec. 13, 2011
8068389 Tracking error signal detection device and optical disc apparatus Nov. 29, 2011
8054719 Comparator and optical-disc recording/reproduction apparatus Nov. 8, 2011
7995437 Optical pick up and optical disc apparatus Aug. 9, 2011
7990828 Method for controlling focus on label side Aug. 2, 2011
7990815 Optical disc apparatus and method of driving the same Aug. 2, 2011
7990827 Optical disc device and optical disc determination method Aug. 2, 2011
7969830 Near field optical disc and near field optical disc reading apparatus Jun. 28, 2011
7965610 Optical pickup device Jun. 21, 2011
7961566 Optical disc playback device Jun. 14, 2011
7957232 Gap controller and optical information processor Jun. 7, 2011

1 2 3 4 5 6 7 8 9 10 11










 
 
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