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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Park; Cheol-hoon
Address:
Suwon-si, KR
No. of patents:
13
Patents:












Patent Number Title Of Patent Date Issued
7715140 Method of determining size of error and write control method for hard disc drive, hard disc driv May 11, 2010
A method of determining a size of an error generated in a servo sector, a write control method of controlling whether to write data to data sectors successive to a servo sector according to the size of the error generated in the servo sector therein, a HDD using the write control method,
7489467 Method for measuring track width of hard disk drive February 10, 2009
In a method of measuring track widths in a hard disk drive a plurality of estimation values are calculated based on differences in intensity between a plurality first measurement signals produced in relation to a head of the hard disk drive based on a plurality of burst signals stored
7432673 Method, medium, and apparatus controlling current gain change of a spindle motor driver October 7, 2008
A method, medium, and apparatus for controlling a spindle motor of a disk drive. Particularly provided is a method, medium, and apparatus changing a current gain of a spindle motor driver according to the operating environment of the spindle motor. The method of controlling the spindle
7400466 Method and apparatus for driving spindle motor using adaptive feedforward control July 15, 2008
A method and apparatus for driving a spindle motor using adaptive feedforward control. The method includes: detecting a temperature of a drive; calculating a feedforward value corresponding to the detected temperature; and generating a first control signal that is a drive current acc
7369352 Apparatus, medium, and method with seek servo control considering temperature change May 6, 2008
An apparatus, medium, and method to control a disk drive, and in particular, an apparatus, medium, and method controlling a disk drive to perform a seek mode at an optimum state with respect to an operational temperature. A seek servo control method considering temperature change in
7342739 Method, medium, and apparatus compensating for torque variations based on temperature March 11, 2008
A method, medium, and apparatus controlling a hard disk drive, and particularly, embodiments include methods, media, and apparatuses compensating for torque variations with respect to temperature variations in a seek servo operation, compensating for differences between modeling torq
7336438 Write control method of hard disk drive, hard disk drive adapting the method and recording mediu February 26, 2008
The present invention relates to a write control method of a hard disk drive, a hard disk drive adapting the method, and a recording medium storing a program for executing the method. The write control method of a hard disk drive having a disk where servo bursts are written radially
7333292 Seek servo control method for adapting to supply voltage variation and disk drive using the same February 19, 2008
A seek servo control method and device for a disk drive device for performing seek servo control according to a variation in a power supply voltage for the disk drive. The seek servo control method includes: detecting a supply voltage for the disk drive; and adjusting a seek time acc
7248428 Method, medium, and apparatus controlling track seek in a recording and/or reproducing apparatus July 24, 2007
A method, medium, and apparatus controlling a hard disk drive, and more particularly, a method, medium, and apparatus controlling a track seek of a hard disk drive, where the hard disk drive compensates for a gain distortion and a phase delay caused by a notch filter and a VCM driver
7203024 Method of testing servo burst signals of hard disk drive and recording medium adapted therefor April 10, 2007
A method of testing quality of a servo burst signal recorded on a hard disk drive and a recording medium adapted therefor, the hard disk drive including a plurality of sectors within one track and the burst signals for servo control recorded radially on each sector. The method includes:
7145743 Apparatus and method for unlatching a head within a data storage device December 5, 2006
For unlatching a head within a data storage device, such as a HDD (hard disc drive), a VCM (voice coil motor) amplifier with a switch is used for applying at least one cycle of an acceleration current pulse to a voice coil motor (VCM) for unlatching the head during an acceleration time
7116515 Method and apparatus for compensating for torque change in seek servo October 3, 2006
A method and apparatus to compensate for a difference between an actual torque constant and a modeling torque constant used for servo design in a disc drive. The method has operations of: performing predetermined test seeks with respect to test seek positions into which a disc is divided
7031098 Method of measuring compensation value for short track seeking in hard disc drive and method of April 18, 2006
A method of calculating bias compensation values for track seeking, including: setting a reference track, and search tracks disposed between the reference track and an innermost track and between the reference track and an outermost track; calculating bias compensation values usable










 
 
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