Inventor

OOI KIANKEONG

SG45 patents

⚠️ This page may combine multiple inventors who share the name “OOI KIANKEONG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

OOI KIANKEONG

SEAGATE TECHNOLOGY LLC

Repeatable runout compensation using iterative learning control in a disc storage system

Repeatable runout compensation using a learning algorithm with scheduled parameters

Method and apparatus for feedforward repeatable runout compensation in a selected frequency range

Head polarity detection algorithm and apparatus

Method and apparatus for handling multiple resonance frequencies in disc drives using active damping

Data storage medium with optimized servo format

Random vibration and shock compensator using a disturbance observer

Tuning track density for data storage device

Detection and cancellation of cage frequency using the clock head in a servowriter

Closed-loop fly height control using sector-specific, repeatable VGA values

Sinusoidal feed-forward seek with adaptive acoustic level constraint

Automatic acoustic management system for a disc drive

Method for harmonic frequency identification in a disc drive

Optimally designed parsimonious repetitive learning compensator for hard disc drives having high track density

Vibration compensation based on identification of vibration frequency

AC unlatch using grey code detection with zone partitioning

Impact protection for a retractable control object

Head-disc assembly with embedded product identification code

Data protection based on system vibration modes

Discontinuous mode back EMF measurement

Phase-advanced filter for robust resonance cancellation

HDD write buffer zone for vibration condition

Temperature compensation of seek profiles in data storage devices

Track closure error cancellation for a disc drive

Seek in a disc drive with nonlinear pivot friction

Prediction-based data reassignment

Determining a location based on a cyclic bit sequence containing consecutively-placed identical bit-groups

Motor control circuit with adaptive controller path selection for different load conditions

Sensing a prior transducer position by a motion pattern

Closed-loop fly height control using transfer function between harmonic response and heater input

Method of characterizing and screening voice coil motor pivot friction in a low velocity region

Servo gain adjustment based on bias force error

Adaptive voltage-mode controller for a voice coil motor

Electrical phase compensation in BEMF spindle motor control

AC MR-offset compensation

Using a mechanical stop for determining an operating parameter of a data handling device

Acoustical noise reduction for a data storage device

Resonance screen with varying frequency and controllable gain booster

Variable spindle speed for ramp unload

Dynamic configuration of seek recovery in a disk drive

Method and apparatus for determining high order polynomials for linearization of position signals

LIM KANG HAI

Determining microactuator failure in a multi-stage tracking system

BI QIANG

Data storage medium having system data stored in a guard band between zones of consecutive data storage tracks

DING MINGZHONG

Storage device maintenance in a portable device based on a power event

LIM JUIJING

Shock absorber capable of damping vibration