Hae J Lee

6791780, Sep 14, 2004

Oct 15, 2001

09/978904

Hae Jung Lee - Santa Clara CA
Sang Lee - Pleasanton CA
Keung Youn Cho - San Jose CA
Ken Bovatsek - San Jose CA

Samsung Electronics Co., Inc.

G11B 503

360 66, 360 31, 360 53

The present invention is a method and system to optimize a write channel in a hard disk drive. The method comprises providing a disk having a at least one side with a plurality of tracks, and selecting a target track from the plurality of tracks. Data is written at least once on a predetermined plurality of tracks adjacent to either side of the target track and on the target track. Data is also written a predetermined number of times on tracks immediately adjacent to the target track. Data written on the predetermined plurality of tracks adjacent to either side of the target track and on the target track is then read. The process then determines if a number of errors on the tracks is greater than a predetermined criteria, if so, a write current value of the write channel is decreased, otherwise the write current value is increased.

6975475, Dec 13, 2005

Nov 14, 2002

10/294115

Hae Jung Lee - Santa Clara CA, US
Sang Lee - Pleasonton CA, US
Keung Youn Cho - San Jose CA, US

Samsung Electronics Co., Ltd. - Suwon

G11B005/02

360 68, 360 46, 360 67

The invention includes a testing method which may be applied to at least one writer in a disk drive during the self-test phase to generate write parameters, focused on the Over Shoot Control (OSC) of the write current parameter to improve the reliability of write operations by that writer. The Minimum OSC is used for write operations in normal temperatures. The Optimum OSC is used for a first lower temperature range, preferably between essentially 15 Centigrade and essentially 5 Centigrade. The Maximum OSC is preferred below essentially 5 C. The Minimum OSC should preferably guarantee both an Adjacent Track Write (ATW) criteria, as well as guarantee a Write Induced Instability (WII) criteria. The invention includes the write parameter collection, as well as the disk drive containing the generated write parameter collection. The invention also includes the method of using that write parameter collection to control a writer while writing to tracks belonging to the radial zone collection and program systems implementing the invention's methods.

7253978, Aug 7, 2007

Jul 6, 2005

11/176414

Hae Jung Lee - Santa Clara CA, US
Sang Lee - Pleasonton CA, US
Keung Youn Cho - San Jose CA, US

Samsung Electronics Co., Ltd. - Suwon, Kyungki-Do

G11B 27/36

360 31, 360 46, 360 51, 360 55, 360 66, 360 68

The invention includes a testing method which may be applied to at least one writer in a disk drive during the self-test phase to generate write parameters, focused on the Over Shoot Control (OSC) of the write current parameter to improve the reliability of write operations by that writer. The Minimum OSC is used for write operations in normal temperatures. The Optimum OSC is used for a first lower temperature range, preferably between essentially 15 degrees Centigrade and essentially 5 degrees Centigrade. The Maximum OSC is preferred below essentially 5 degrees Centigrade. The Minimum OSC should preferably guarantee both an Adjacent Track Write (ATW) criteria, as well as guarantee a Write Induced Instability (WII) criteria. The invention includes the write parameter collection, as well as the disk drive containing the generated write parameter collection. The invention also includes the method of using that write parameter collection to control a writer while writing to tracks belonging to the radial zone collection and program systems implementing the invention's methods.

20030043489, Mar 6, 2003

Aug 31, 2001

09/945452

Hae Lee - Santa Clara CA, US
Sang Lee - Pleasanton CA, US
Keung Cho - San Jose CA, US

G11B005/09
G11B027/36

360/053000, 360/031000

A method and system to optimize the performance of a read/write head in a hard disk drive. The method comprises providing a disk having at least one side with a plurality of tracks, selecting a current value, and applying the current value to the read/write head. The performance of the read/write head is then measured and the method determines if the current value has been applied to the read/write head a predetermined number of times. If not, the current value is applied to the read/write head a predetermined number of times. The best performance value of the read/write head and a corresponding current value are then stored.

20040061967, Apr 1, 2004

Sep 26, 2002

10/256579

Hae Lee - Santa Clara CA, US
Sang Lee - Pleasonton CA, US
Keung Cho - San Jose CA, US

G11B021/02

360/075000

Today, the servo tracks are written successively in one of two directions. The inventors discovered that both servo track writing directions have problems. These problems increase in severity as the TPI increases. The discovered problems also increase in severity as the read-write head diminishes in size. The invention includes a method of writing the servo tracks of a rotating disk surface by writing the servo tracks from the Outside Position to essentially the Middle Position and by writing the servo tracks from the Inside Position to essentially the Middle Position. Writing the servo tracks with this method significantly decreases the erase band overhead. The invention includes program systems and apparatus implementing the method of servo track writing.

20060103972, May 18, 2006

Nov 12, 2004

10/986684

Sang Chu - Santa Clara CA, US
Kang Lee - San Jose CA, US
Keung Cho - San Jose CA, US
Jong Kim - San Jose CA, US
Jung Lee - San Jose CA, US
Cheol Park - Suwon, KR
Hae Lee - Santa Clara CA, US

G11B 5/596

360078040

A hard disk drive with a disk that has a plurality of servo sections and a plurality of data sections. At least some of the data sections have a track density different than the track density of the servo sections. The disk drive has a controller that may convert a data track number to a servo track number to compensate for the different densities. The conversion may be required to conduct a seek routine to access a data track associated with the data track number.

20120169061, Jul 5, 2012

Mar 7, 2012

13/414692

Tai Koan Lee - Sunnyvale CA, US
Hae Sook Lee - Sunnyvale CA, US

F03D 9/00
H02K 47/20

290 55, 310113

A power generation system and generator provided through a fluid flow energy source to generate electricity. The system comprising an energy source of one or more wind turbines; a motor; a transmission component comprising a pump, set of water circulators, set of water pipes, and set of transmission devices. Electricity generated from the wind turbine is adjusted, supplied to a vehicle motor, and powers the pump motor for moving water into the circulators. Another power generation system comprises unidirectional conduits for receiving an external fluid flow, a pump, a water turbine operatively connected with a transmission which is connected to a generator. In another embodiment, instead of a water turbine, one or more fluid circulators are operatively connected with a transmission which is connected to a generator. Fluid released from the pump enters a reservoir in fluid connection with a unidirectional conduit, through which fluid is pulled through the system.

20150130843, May 14, 2015

Nov 14, 2013

14/079958

- Redmond WA, US
Doyop Kim - Emeryville CA, US
Hae Jin Lee - Seattle WA, US
Haider Ali Razvi - Sunnyvale CA, US
Raymond William Rischpater - Boulder Creek CA, US

Microsoft Corporation - Redmond WA

G06T 3/60
G06T 3/40

345650

One or more techniques and/or systems are provided for providing a lens view associated with a map canvas. The map canvas may depict an area comprising one or more locations associated with imagery of such locations (e.g., a map of a shopping district may comprise a toy store associated with imagery of the toy store). Accordingly, the map canvas may be populated with a lens view depicting a location within the map canvas (e.g., depicting imagery of the toy store). A correspondence between a lens heading of the lens view and a map heading of the map canvas may be maintained. For example, responsive to rotation of the map canvas changing a current map heading of the map canvas to a rotated map heading, a current lens heading of the lens view maybe modified to a rotated lens heading corresponding to the rotated map heading.