David X Yu

US Patent:

7358974, Apr 15, 2008

Filed:

Jan 29, 2002

Appl. No.:

10/058050

Inventors:

David R. Blythe - San Carlos CA, US
Marc Schafer - Naples, IT
Paul Jeffrey Ungar - Mountain View CA, US
David Yu - San Francisco CA, US

Assignee:

Silicon Graphics, Inc. - Mountain View CA

International Classification:

G06F 15/80
G06T 15/30

US Classification:

345505, 345423, 345418

Abstract:

A method and system for minimizing an amount of data needed to test data against subarea boundaries in spatially composited digital video. Spatial compositing uses a graphics unit or pipeline to render a portion (subarea) of each overall frame of digital video images. This reduces the amount of data that each processor must act on and increases the rate at which an overall frame is rendered. Optimization of spatial compositing depends on balancing the processing load among the different pipelines. The processing load typically is direct function of the size of a given subarea and a function of the rendering complexity for objects within this subarea. Load balancing strives to measure these variables and adjust, from frame to frame, the number, sizes, and positions of the subareas. The cost of this approach is the necessity to communicate, in conjunction with each frame, the graphics data that will be rendered. Graphics data for a frame is composed of geometry chunks.

US Patent:

7737982, Jun 15, 2010

Filed:

Apr 15, 2008

Appl. No.:

12/103586

Inventors:

David R. Blythe - San Carlos CA, US
Marc Schafer - Naples, IT
Paul Jeffrey Ungar - Mountain View CA, US
David Yu - San Francisco CA, US

Assignee:

Graphics Properties Holdings, Inc. - Palo Alto CA

International Classification:

G06F 15/80

US Classification:

345505, 345423, 345418

Abstract:

A method and system for minimizing an amount of data needed to test data against subarea boundaries in spatially composited digital video. Spatial compositing uses a graphics unit or pipeline to render a portion (subarea) of each overall frame of digital video images. This reduces the amount of data that each processor must act on and increases the rate at which an overall frame is rendered. Optimization of spatial compositing depends on balancing the processing load among the different pipelines. The processing load typically is a direct function of the size of a given subarea and a function of the rendering complexity for objects within this subarea. Load balancing strives to measure these variables and adjust, from frame to frame, the number, sizes, and positions of the subareas. The cost of this approach is the necessity to communicate, in conjunction with each frame, the graphics data that will be rendered. Graphics data for a frame is composed of geometry chunks.

US Patent:

7894248, Feb 22, 2011

Filed:

Sep 12, 2008

Appl. No.:

12/210126

Inventors:

David Chang-Cheng Yu - Pleasanton CA, US
Xiao Luo - Cupertino CA, US

Assignee:

Grandis Inc. - Milpitas CA

International Classification:

G11C 11/00
G11C 17/00
G11C 17/02
G11C 11/14
G11C 17/18

US Classification:

365158, 365 96, 365 97, 365171, 3652257

Abstract:

Techniques, apparatus and circuits based on magnetic or magnetoresistive tunnel junctions (MTJs). In one aspect, a programmable circuit device can include a magnetic tunnel junction (MTJ); a MTJ control circuit coupled to the MTJ to control the MTJ to cause a breakdown in the MTJ in programming the MTJ; and a sensing circuit coupled to the MTJ to sense a voltage under a breakdown condition of the MTJ.

US Patent:

7924287, Apr 12, 2011

Filed:

Jun 11, 2010

Appl. No.:

12/814306

Inventors:

David M. Blythe - San Carlos CA, US
Marc Schafer - Naples, IT
Paul Jeffrey Ungar - Mountain View CA, US
David Yu - San Francisco CA, US

Assignee:

Graphics Properties Holdings, Inc. - Palo Alto CA

International Classification:

G06F 15/80

US Classification:

345505, 345423, 345418

Abstract:

A method and system for minimizing an amount of data needed to test data against subarea boundaries in spatially composited digital video. Spatial compositing uses a graphics unit or pipeline to render a portion (subarea) of each overall frame of digital video images. This reduces the amount of data that each processor must act on and increases the rate at which an overall frame is rendered. Optimization of spatial compositing depends on balancing the processing load among the different pipelines. The processing load typically is a direct function of the size of a given subarea and a function of the rendering complexity for objects within this subarea. Load balancing strives to measure these variables and adjust, from frame to frame, the number, sizes, and positions of the subareas. The cost of this approach is the necessity to communicate, in conjunction with each frame, the graphics data that will be rendered. Graphics data for a frame is composed of geometry chunks.

US Patent:

8169441, May 1, 2012

Filed:

Apr 11, 2011

Appl. No.:

13/084091

Inventors:

David R. Blythe - San Carlos CA, US
Marc Schafer - Naples, IT
Paul Jeffrey Ungar - Mountain View CA, US
David Yu - San Francisco CA, US

Assignee:

Graphics Properties Holdings, Inc. - Newark CA

International Classification:

G06F 15/80

US Classification:

345505, 345423, 345418

Abstract:

A method and system for minimizing an amount of data needed to test data against subarea boundaries in spatially composited digital video is provided. Graphics data for a frame is composed of geometry chunks. Each geometry chunk is defined by its own bounding region, where the bounding region defines the space the geometry chunk occupies on the compositing window. Only the parameters that define the bounding region are communicated to each graphics unit in conjunction with the determination of which graphics unit will render the geometry chunk defined by the bounding region. The actual graphics data that comprises the geometry chunk is communicated only to those geometry units that will actually render the geometry chunk. This reduces the amount of data needed to communicate graphics data information in spatially composited digital video.

US Patent:

20040061456, Apr 1, 2004

Filed:

Sep 30, 2002

Appl. No.:

10/261831

Inventors:

David Yu - Rancho Palos Verdes CA, US
James Clendenin - Menlo Park CA, US
Robert Kirby - Cupertino CA, US

International Classification:

H05H009/00

US Classification:

315/505000

Abstract:

A photoelectron linear accelerator for producing a low emittance polarized electron beam. The linear accelerator includes a tube having an inner wall, the inner tube wall being coated by a getter material. A portable, or demountable, cathode plug is mounted within said tube, the surface of said cathode having a semiconductor material formed thereon.

US Patent:

20070047601, Mar 1, 2007

Filed:

Aug 9, 2005

Appl. No.:

11/199628

Inventors:

David Yu - Rancho Palos Verdes CA, US

International Classification:

H01S 3/10
H01S 3/08

US Classification:

372025000, 372100000, 372103000

Abstract:

A device for generating a plurality of laser pulses from a recirculating single laser pulse in an optical delay line that is capable of partially transmitting the trapped pulse out of the delay line. The energy of the partially reflected trapped pulse is restored before beginning another round trip in the delay line. The time structure of an output pulse train thus generated by the device comprises a sequence of macro pulses, each comprising a plurality of micro pulses.

US Patent:

20090146085, Jun 11, 2009

Filed:

Dec 7, 2007

Appl. No.:

11/999754

Inventors:

Alexei V. Smirnov - Rancho Palos Verdes CA, US
David U.L. Yu - Rancho Palos Verdes CA, US

International Classification:

G02F 1/39

US Classification:

250504 R

Abstract:

A sub-mm wave source based on Cherenkov resonant radiation of a microbunched electron beam radiating coherently in a dielectric-loaded pipe. The microbunched electron beam is produced in a pulse photoinjector by illuminating a metal photocathode with sub-ps or multi-ps intensity-modulated laser beam with a beat wave or multiplexing at terahertz frequencies, the photoelectrons generated at the photocathode being accelerated by an electric field and sub-wavelength focused by magnetic field to propagate through a resonant radiator comprising a corrugated wall or smooth-wall metal capillary pipe internally coated with dielectric and attached to an antenna.