Inventor

LEE HYUNG JAI

US32 patents

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

LEE HYUNG JAI

SAMSUNG ELECTRONICS CO LTD

Head gimbal assemblies for very low flying height heads with optional micro-actuators in a hard disk drive

Method and apparatus for a D33 mode piezoelectric actuator with a bending motion

Method and apparatus for a micro-actuator providing three-dimensional positioning to a slider in a hard disk drive

Scheme to avoid electrostatic discharge damage to MR/GMR head gimbal/stack assembly in hard disk applications

Method and apparatus for estimating micro-actuator stroke sensitivity in a hard disk drive

Method and apparatus for single written-in Repeatable Run-Out correction function used in multi-stage actuation control of hard disk drive

Method and apparatus for micro-actuator stroke sensitivity calibration in a hard disk drive

Pseudo-contact negative pressure air bearing slider with dual negative pressure pockets and central transducer

Method and apparatus supporting magnetic performance measurement of merged read-write heads using the write current and read current

Method and apparatus for sensing leakage current to estimate and possibly adjust flying height of a read-write head in a hard disk drive

Online identification of secondary actuator transfer function via system decoupling in multiple-stage actuator servo systems in disk drives

Method and apparatus for estimating and controlling the flying height of a read-write head in a hard disk drive

Ramp design for reducing read-write head track positioning errors

Method and apparatus using embedded sensor in a piezoelectric micro-actuator in a hard disk drive

Balance tube for a spindle motor assembly of a hard disk drive

Method and apparatus coupling at least one piezoelectric device to a slider in a hard disk drive for microactuation

Method and apparatus of dual stage servo control with dual control paths and decoupling feedback for track following in a hard disk drive

Method and apparatus for a MEMS micro-actuator assembly in a hard disk drive

Method and apparatus of dual stage servo control for track following in a hard disk drive

Method to detect junction induced signal instability from GMR/MR heads

Apparatus and method for a piezoelectric micro-actuator for a hard disk drive

Method and apparatus for a single piezoelectric micro-actuator in a head gimbal assembly of a hard disk drive

Written-in repeatable run-out correction for hard disk drives

Method and apparatus to detect sub-micron particles in a hard disk drive with optical pickup

KWON HAESUNG

Method and apparatus for dampening and filtering air flow effects in a hard disk drive

Balanced motor micro-actuator

Method and apparatus for a disk damper including an enclosing flow chamber wall for a hard disk drive

Method and apparatus coupling to a slider in a hard disk drive for microactuation

SAMSUNG ELECTRONICS CO LDT

Method and apparatus of micro-actuator control of the flying height of a read/write head in a hard disk drive

Method and apparatus for disk damper extending across all data tracks of a rotating disk surface upwind of the voice coil actuator in a hard disk drive

(unassigned)

Method and apparatus stabilizing the magnetic domain of merged magnetoresistive read-write heads using dc write current and read bias current

SHARMA VINOD

In-situ dynamic pitch and roll adjustment in hard disk drives