Wen Hwa Lin

US Patent:

6784831, Aug 31, 2004

Filed:

May 5, 2003

Appl. No.:

10/429492

Inventors:

James June-Ming Wang - San Marino CA
Wen Yen Lin - Arcadia CA

Assignee:

TIA Mobile, Inc. - Pasadena CA

International Classification:

G01S 502

US Classification:

34235712, 34235706, 342372, 701213

Abstract:

An improved GPS signal receiver (and corresponding method of operation) includes a plurality of antenna elements each receiving a plurality of GPS signals (e. g. , GPS LI signals or GPS L2 signals). A plurality of mixers (which correspond to the array of antenna elements) and a combining node convert the GPS signals received at the antenna elements in a frequency-division-multiplexed (FDM) manner over FDM frequency bands logically assigned to the antenna elements to produce a composite signal representing such GPS signals. An analog-to-digital converter converts an analog signal derived from the composite signal (which may be an intermediate frequency signal or a baseband signal) into a digital word stream. Demultiplexing logic extracts GPS signal components in the digital word stream. The GPS signal components correspond to the FDM frequency bands logically assigned to the antenna elements.

US Patent:

D511220, Nov 1, 2005

Filed:

Apr 5, 2004

Appl. No.:

29/202800

Inventors:

Wen Chung Lin - Rancho Palos Verdes CA, US

International Classification:

2604

US Classification:

D26 28, D26139

US Patent:

7123876, Oct 17, 2006

Filed:

Nov 1, 2001

Appl. No.:

10/016233

Inventors:

James June-Ming Wang - San Marino CA, US
ChauChin Yang - Los Angeles CA, US
Wen Yen Lin - Arcadia CA, US

Assignee:

Motia - Pasadena CA

International Classification:

H04B 7/14

US Classification:

455 25, 455 133, 455 132, 455 19, 455 634, 4551151, 4551152, 455 121, 342354, 342372, 342373, 342374, 342359, 342757

Abstract:

A low profile, vehicle mounted, in-motion tracking, satellite antenna includes a pair of antenna assemblies mounted in parallel on a rotatable platform. Each antenna assembly includes two subreflectors with a plastic matching element. The outputs of the two antenna assemblies are coupled with a single phase shifter. The combined outputs are retransmitted to a receiver inside the vehicle. The satellite antenna also includes a receiver for receiving channel selection data and/or for providing two-way communication with equipment inside the vehicle. The antennae, transmitter and receiver are self-powered by a storage device which is charged by a wind driven generator. A retractable radome lowers to a lower profile when the antenna is not in use.

US Patent:

20020117692, Aug 29, 2002

Filed:

Feb 27, 2001

Appl. No.:

09/794432

Inventors:

Wen Lin - Rancho Palos Verdes CA, US

International Classification:

F21V029/00

US Classification:

257/235000, 362/267000, 362/310000, 362/800000, 362/249000

Abstract:

The invention is a moisture resistant LED-illuminated vehicle bulb assembly capable of installation into a conventional vehicle incandescent bulb socket. The moisture resistant LED-illuminated vehicle bulb assembly satisfies a long felt need to provided a long life, bright and economic vehicle bulb that can be used as a replacement for incandescent bulb-type lamps or as original equipment in new vehicles. The moisture resistant LED-illuminated vehicle bulb assembly is employable in stop lamps, clearance/marker lamps, as well as combination brake, turn and tail lamps for passenger vehicle lamps and in heavy-duty trucks and trailers.

US Patent:

20200266740, Aug 20, 2020

Filed:

May 8, 2020

Appl. No.:

16/869617

Inventors:

- Dallas TX, US
Rakesh Raja - Allen TX, US
Wen Pin Lin - Allen TX, US
Sudhir Nagaraj - Dallas TX, US

International Classification:

H02P 8/38
H02P 8/34
H02P 8/12

Abstract:

In one embodiment, a method includes detecting, by a stall detection sensor in a driver coupled to a stepper motor, a first set of time-off periods in a rising commutation phase of motor current during current regulation. The stall detection sensor further detects a second set of time-off periods in a falling commutation phase of motor current during current regulation. Next, the stall detection sensor compares the first set of time-off periods with the second set of time-off periods and determines whether the stepper motor is stalled based on the comparison of the first set of time-off periods with the second set of time-off periods.