Cheng Youn 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:

6969531, Nov 29, 2005

Filed:

Aug 26, 2003

Appl. No.:

10/649082

Inventors:

Philip Dehazya - Westbury NY, US
Cheng Lu - Livingston NJ, US

Assignee:

Engelhard Corporation - Iselin NJ

International Classification:

C08B037/00
A61K009/50

US Classification:

424493, 536 54, 536115, 536118, 536124, 514 54, 424489

Abstract:

The present invention relates to microspheres comprising hyaluronan derivatized with a bifunctional crosslinker to form microspheres. Methods of making such microspheres, comprising mixing hyaluronic acid and a dihydrazide with a crosslinker in an aqueous solution, adding a solvent and an emulsifying agent to form an emulsion, and lowering the pH of the emulsion to allow intramolecular and intermolecular crosslinking to occur, are also disclosed. The invention also provides for pharmaceutical or cosmetic formulations based on the microspheres described herein, further containing one or more active or cosmetic agents, and methods of using such formulations.

US Patent:

20030096734, May 22, 2003

Filed:

Dec 5, 2002

Appl. No.:

10/310629

Inventors:

Philip Dehazya - Westbury NY, US
Cheng Lu - Livingston NJ, US

Assignee:

Clear Solutions Biotech, Inc.

International Classification:

A61K031/00
C08B037/00
A61K031/728

US Classification:

514/001000, 514/054000, 536/053000

Abstract:

The present invention relates to microspheres comprising hyaluronan derivatized with a bifunctional crosslinker to form microspheres. Methods of making such microspheres, comprising mixing hyaluronic acid and a dihydrazide with a crosslinker in an aqueous solution, adding a solvent and an emulsifying agent to form an emulsion, and lowering the pH of the emulsion to allow intramolecular and intermolecular crosslinking to occur, are also disclosed. The invention also provides for pharmaceutical or cosmetic formulations based on the microspheres described herein, further containing one or more active or cosmetic agents, and methods of using such formulations.

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:

20120275667, Nov 1, 2012

Filed:

Aug 25, 2011

Appl. No.:

13/217619

Inventors:

CHENG LU - San Jose CA, US

Assignee:

APTINA IMAGING CORPORATION - GEORGE TOWN GRAND CAYMAN

International Classification:

G06K 9/00
H04N 13/02

US Classification:

382118, 348 47, 348E13074

Abstract:

Apparatus and a method for generating a rectified image. First pixel information corresponding to a first image is received from a first imager. Second pixel information corresponding to a second image is received from a second imager. A plurality of facial feature points of a portrait in each of the first and second images are identified. A fundamental matrix is generated based on the detected facial features. An essential matrix is generated based on the fundamental matrix. Rotational and translational information corresponding to the first and second imagers are generated based on the essential matrix. The rotational and translational information are applied to at least one of the first and second images to generate at least one rectified image.

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.

US Patent:

20200391749, Dec 17, 2020

Filed:

Jun 13, 2019

Appl. No.:

16/439802

Inventors:

- Mountain View CA, US
Cheng Lu - Mountain View CA, US
Tianpeng Feng - Mountain View CA, US
Yandong Guo - Mountain View CA, US
Jun Ma - Mountain View CA, US

International Classification:

B60W 40/02
F21V 5/00
H01L 27/146

Abstract:

Apparatus for controlling a brightness of a display of a vehicle includes: an infrared illuminator, configured to emit infrared light in the vehicle; a near infrared (NIR) light sensing unit, configured to capture reflected infrared light; an image data processing unit, configured to analyze the reflected infrared light to generate a feedback; an imaging control unit, configured to adjust, in response to the feedback, one or more of a plurality of properties of the NIR light sensing unit, so that readouts of the NIR light sensing unit are within a first range, wherein the image data processing unit generates a calculated NIR intensity readout under the adjusted properties; a reconstruction unit, configured to reconstruct a human perceived brightness based on the calculated NIR intensity readout; and the display, configured to adjust the brightness. The NIR light sensing unit is a unit of a driver monitoring system (DMS).

US Patent:

20200394390, Dec 17, 2020

Filed:

Jun 13, 2019

Appl. No.:

16/439870

Inventors:

- Mountain View CA, US
Tianpeng Feng - Mountain View CA, US
Cheng Lu - Mountain View CA, US
Yandong Guo - Mountain View CA, US
Jun Ma - Mountain View CA, US

International Classification:

G06K 9/00
G06K 9/20
G06K 9/62
H04N 5/235

Abstract:

Apparatus for vehicle driver recognition includes: a NIR LED illuminator, configured to emit NIR light in the vehicle; a NIR light sensing unit, configured to capture reflected NIR light; an image controlling and processing unit, configured to coordinate the NIR LED illuminator and the NIR light sensing unit, and analyze the reflected NIR light to generate an image; a face detector, configured to determine that a human face exists in the image, and identify a face region; a face feature extractor, configured to analyze the face region to extract a feature vector representing the face region; a face feature dictionary, configured to store existing feature vectors; a face retrieval system, configured to generate an identification result, indicating whether a similarity between the feature vector and any of the existing feature vectors is greater than a first threshold; and a user interface, configured to display the identification result.