David E Chavez

US Patent:

6549772, Apr 15, 2003

Filed:

May 30, 2000

Appl. No.:

09/583823

Inventors:

David A. Chavez - Monte Sereno CA
Ian L. Sayers - Redwood City CA
Gerald F. Sage - Mountain View CA

Assignee:

Interwave Communications International Ltd. - Hamilton

International Classification:

H04Q 736

US Classification:

455422, 455101, 455132, 455524, 455560, 455562, 370328, 375347

Abstract:

A multiple antenna cellular network communicates with a mobile station over a plurality of antennas. The antennas are arranged in a plurality of positions to customize a cell or cells. A transceiver is coupled to the antennas and configured to receive inbound information from the mobile station and transmit outbound information to the mobile station. A processor is coupled to the transceiver and configured to decode the inbound information and to encode the outbound information to communicate with the mobile station. In another embodiment, the transmit signal power is continuously modified to move interference nulls to improve quality so that a fixed location user can receive a high quality signal. Exemplary embodiments are provided for use with the Global Systems for Mobile Communication (GSM) protocol and can be applied to other digital technologies.

US Patent:

20120162214, Jun 28, 2012

Filed:

Dec 21, 2011

Appl. No.:

13/333299

Inventors:

David A. Chavez - San Jose CA, US
Milind Paranjpe - Mountain View CA, US
Jerome C. Tu - Saratoga CA, US

International Classification:

G06T 15/00

US Classification:

345419

Abstract:

Tracking objects presented within a stereo three-dimensional (3D) scene. The user control device may include one or more visually indicated points for at least one tracking sensor to track. The user control device may also include other position determining devices, for example, an accelerometer and/or gyroscope. Precise 3D coordinates of the stylus may be determined based on location information from the tracking sensor(s) and additional information from the other position determining devices. A stereo 3D scene may be updated to reflect the determined coordinates

US Patent:

60700718, May 30, 2000

Filed:

Nov 12, 1996

Appl. No.:

8/748015

Inventors:

David A. Chavez - Monte Sereno CA
Ian L. Sayers - Redwood City CA
Gerald F. Sage - Mountain View CA

Assignee:

InterWAVE Communications International Ltd. - Hamilton

International Classification:

H04Q 736

US Classification:

455422

Abstract:

A multiple antenna cellular network communicates with a mobile station over a plurality of antennas. The antennas are arranged in a plurality of positions to customize a cell or cells. A transceiver is coupled to the antennas and configured to receive inbound information from the mobile station and transmit outbound information to the mobile station. A processor is coupled to the transceiver and configured to decode the inbound information and to encode the outbound information to communicate with the mobile station. In another embodiment, the transmit signal power is continuously modified to move interference nulls to improve quality so that a fixed location user can receive a high quality signal. Exemplary embodiments are provided for use with the Global Systems for Mobile Communication (GSM) protocol and can be applied to other digital technologies.

US Patent:

60788232, Jun 20, 2000

Filed:

Jan 3, 1996

Appl. No.:

8/582512

Inventors:

David A. Chavez - Monte Sereno CA
Ian L. Sayers - Redwood City CA
Gerald F. Sage - Mountain View CA

Assignee:

Interwave Communications International Ltd. - Hamilton

International Classification:

H04B 140

US Classification:

455562

Abstract:

A multiple antenna cellular network communicates with a mobile station over a plurality of antennas. The antennas are arranged in a plurality of positions to customize a cell or cells. A transceiver is coupled to the antennas and configured to receive inbound information from the mobile station and transmit outbound information to the mobile station. A processor is coupled to the transceiver and configured to decode the inbound information and to encode the outbound information to communicate with the mobile station. In another embodiment, the antennas are similarly deployed to create a cell or cells. The transmit signal power is continuously modified to improve quality and to move the nulls so that a fixed location user can receive a high quality signal. Exemplary embodiments are provided for use with the Global Systems for Mobile Communication (GSM) protocol and can be applied to other digital technologies.

US Patent:

20210074055, Mar 11, 2021

Filed:

Sep 6, 2019

Appl. No.:

16/562944

Inventors:

- Sunnyvale CA, US
Clifford S. Champion - San Jose CA, US
David A. Chavez - San Jose CA, US
Kevin S. Yamada - Sunnyvale CA, US
Alexandre R. Lelievre - Hollywood CA, US

International Classification:

G06T 15/06
G06T 15/00
G06N 7/00
G06T 15/10
G06T 19/00
G06F 9/38

Abstract:

Systems and methods for implementing methods for user selection of a virtual object in a virtual scene. A user input may be received via a user input device. The user input may be an attempt to select a virtual object from a plurality of virtual objects rendered in a virtual scene on a display of a display system. A position and orientation of the user input device may be determined in response to the first user input. A probability the user input may select each virtual object may be calculated via a probability model. Based on the position and orientation of the user input device, a ray-cast procedure and a sphere-cast procedure may be performed to determine the virtual object being selected. The probability of selection may also be considered in determining the virtual object. A virtual beam may be rendered from the user input device to the virtual object.

US Patent:

20190253699, Aug 15, 2019

Filed:

Apr 25, 2019

Appl. No.:

16/394406

Inventors:

- Sunnyvale CA, US
Arthur L. Berman - San Jose CA, US
Jerome C. Tu - Saratoga CA, US
Kevin D. Morishige - Los Altos Hills CA, US
David A. Chavez - San Jose CA, US

International Classification:

H04N 13/398
H04N 13/366
H04N 13/337
H04N 13/334

Abstract:

Systems and methods for capturing a two dimensional (2D) image of a portion of a three dimensional (3D) scene may include a computer rendering a 3D scene on a display from a user's point of view (POV). A camera mode may be activated in response to user input and a POV of a camera may be determined. The POV of the camera may be specified by position and orientation of a user input device coupled to the computer, and may be independent of the user's POV. A 2D frame of the 3D scene based on the POV of the camera may be determined and the 2D image based on the 2D frame may be captured in response to user input. The 2D image may be stored locally or on a server of a network.

US Patent:

20180033211, Feb 1, 2018

Filed:

Jul 29, 2016

Appl. No.:

15/223952

Inventors:

- Sunnyvale CA, US
Clifford S. Champion - San Jose CA, US
David A. Chavez - San Jose CA, US
Francisco Lopez-Fresquet - Boulder Creek CA, US
Jonathan J. Hosenpud - San Francisco CA, US
Robert D. Kalnins - San Jose CA, US
Alexandre R. Lelievre - Hollywood CA, US
Christopher W. Sherman - Leesburg VA, US
Jerome C. Tu - Saratoga CA, US
Kevin S. Yamada - Sunnyvale CA, US
Chun Wun Yeung - Cupertino CA, US

International Classification:

G06T 19/20
G06F 3/0488
G06F 3/0354
G06F 3/0484
G06F 3/16
H04N 13/04
G06F 3/0481

Abstract:

Systems and methods for interacting with a display system using a personal electronic device (PED). The display system may establish communication with and receive user input from the PED. The display system may use the received user input to generate and/or update content displayed on a display of the display system.

US Patent:

20170102791, Apr 13, 2017

Filed:

Oct 9, 2015

Appl. No.:

14/880007

Inventors:

- Sunnyvale CA, US
Arthur L. Berman - San Jose CA, US
Clifford S. Champion - San Jose CA, US
David A. Chavez - San Jose CA, US
Francisco Lopez-Fresquet - Boulder Creek CA, US
Robert D. Kalnins - San Jose CA, US
Alexandre R. Lelievre - Hollywood CA, US
Christopher W. Sherman - Leesburg VA, US
Jerome C. Tu - Saratoga CA, US
Murugappan R. Venkat - Los Altos CA, US

International Classification:

G06F 3/0354
H04N 13/04

Abstract:

Virtual plane and use in a stylus based three dimensional (3D) stereoscopic display system. A virtual plane may be displayed in a virtual 3D space on a display of the 3D stereoscopic display system. The virtual plane may extend from a stylus of the 3D stereoscopic display system. Content may be generated in response to a geometric relationship of the virtual plane with at least one virtual object in the virtual 3D space. The generated content may indicate one or more attributes of the at least one virtual object. The content may be presented via the 3D stereoscopic display system.