Cheng Chan Lu

US Patent:

6909731, Jun 21, 2005

Filed:

Jan 22, 2004

Appl. No.:

10/764380

Inventors:

Cheng Youn Lu - Fremont CA, US

International Classification:

H01S003/10
H01S003/13
H01S003/00

US Classification:

372 2901, 372 29011, 372 26, 372 24021, 372 381, 372 3801, 372 3802, 372 33

Abstract:

An automatic closed loop power control system is described for simultaneously adjusting an output power and an extinction ratio P/Pof a laser diode in order to maintain a desired average output power and a desired extinction ratio. The bias current component of a laser diode drive current is adjusted to compensate for changes in the average output power caused by ambient characteristics such as temperature and aging. Simultaneously, a modulation current component of the laser diode drive current is adjusted to maintain an extinction ratio of the laser diode output signal. The bias current and modulation current adjustments are based on the second order statistics of an average output power of the laser diode and a variance in the power output of the laser diode.

US Patent:

20080013640, Jan 17, 2008

Filed:

Jan 31, 2007

Appl. No.:

11/700359

Inventors:

Cheng Lu - Rego Park NY, US
Richard Locarni - Stony Brook NY, US
Richard Hummel - E. Patchogue NY, US
Frank Haunstein - Wading River NY, US
Michael Dombrowski - Wantagh NY, US

Assignee:

Data Device Corporation - Bohemia NY

International Classification:

H04L 23/02

US Classification:

375261000, 375260000

Abstract:

A multi-dimensional Burst Link Access Streaming Transmission (BLAST) architecture, which provides flexible physical apparatus for balanced performance of data throughput, latency, and reliability of transmission (e.g. graceful degradation). A schedule is sent from a master node to alert targeted nodes regarding messages to be sent. The master node uses a P-Band transmission link operating a regular intervals to synchronize the system in preparation for receipt of a message over a synchronous link. Each node has the capability of sending and receiving synchronous and asynchronous messages.

US Patent:

20230096119, Mar 30, 2023

Filed:

Sep 15, 2022

Appl. No.:

17/945196

Inventors:

- Cupertino CA, US
Cheng Lu - Daly City CA, US
Hao Tang - San Jose CA, US
Michael P. Johnson - Sunnyvale CA, US

International Classification:

G06T 17/00
G06T 7/50
G06V 10/60

Abstract:

Various implementations disclosed herein provide feedback to a user during object scanning based on how well sensor data of the scanned object has been captured. During object scanning a user may move an electronic device with sensors (e.g., cameras, depth sensors, etc.) around an object to capture sensor data for use in generating a final 3D model of the object. Live feedback during the scanning process is enabled by assessing how well the captured sensor data represents different portions of the object. In some implementations, a 3D model is generated, updated, and assessed based on the sensor data live during the scanning process. This live 3D model may be coarser (i.e., having fewer details) than the final 3D model.