Don B Hoffman

6417849, Jul 9, 2002

Jul 31, 1998

09/127773

Kevin T. Lefebvre - Fort Collins CO
Don B. Hoffman - Fort Collins CO
Jeffrey Joel Walls - Fort Collins CO
Derek J. Lukasik - Fort Collins CO

Hewlett-Packard Company - Palo Alto CA

G06T 1500

345419, 345 4, 345733

Single Logical Screen and Direct Hardware Access in a 3D environment are combined by passing a single stream of protocol to the X Server, which in turn passes the information to multiple 3D rendering processes for display on individual screens (monitors). Multiple instances of a single daemon implement the rendering processes. The X Server communicates with an instance of the daemon functioning as a master daemon, which in turn controls the remaining instances functioning as slave daemons. All daemons communicate through common shared memory segments. This achieves both efficiency and performance, since duplicated distribution of commands and data is avoided. Each of the daemons is driven by the contents of the shared memory segments. To facilitate this, an X Client, the X Server and the daemons are all interconnected with separate control and data paths.

6621500, Sep 16, 2003

Nov 17, 2000

09/715882

Byron A Alcorn - Ft Collins CO
Joseph Norman Gee - Ft Collins CO
Kevin Lefebvre - Ft Collins CO
Don B. Hoffman - Fort Collins CO

Hewlett-Packard Development Company, L.P. - Houston TX

G09G 500

345629, 345630, 345632, 345589, 345594, 345598, 345606

A preferred method includes the step of receiving multiple digital video data streams. Preferably, a first of the multiple digital video data streams contains processed pixel data corresponding to at least a portion of the image to be rendered, and a second of the multiple digital video data streams contains processed pixel data corresponding to at least a portion of the image to be rendered as well as information, such as a chroma-key value, associated with at least some of the processed pixel data. The embodiment also preferably includes the step of combining the multiple digital video data streams into the composite digital video data stream by referencing the chroma-key values. Devices also are provided.

6727899, Apr 27, 2004

Jul 10, 2001

09/903073

Don B. Hoffman - Fort Collins CO
Joseph Norman Gee - Fort Collins CO
Ross Cunniff - Fort Collins CO
Howard D Stroyan - Fort Collins CO

Hewlett-Packard Development Company, L.P. - Houston TX

G06T 1700

345421, 345422

A graphical display system of the present invention efficiently performs occlusion culling based on frame-to-frame temporal coherency. The graphical display system utilizes a frame buffer and rendering logic. The rendering logic is configured to receive graphical objects that define an image frame. In response to receiving one of the objects, the rendering logic is configured to make a determination as to whether the one object is visible in a previous image frame that was previously rendered to the frame buffer. The rendering logic is further configured to render the one object to the frame buffer based on the determination.

6727904, Apr 27, 2004

Mar 1, 2002

10/087151

Jeffrey J. Walls - Fort Collins CO
Don B. Hoffman - Fort Collins CO
Per E Gullberg - Fort Collins CO
Kevin T. Lefebvre - Fort Collins CO

Hewlett-Packard Development Company, L.P. - Houston TX

G06T 120

345506, 345504, 345629

A system rendering graphical data from a graphics application utilizes a plurality of frame buffers, a plurality of graphics pipelines, and logic. Each of the graphics pipelines is configured to render graphical data to a different one of the frame buffers. The logic is configured to determine a mode of operation of the graphics application and to prevent, based on the mode of operation of the graphics application, at least one of the graphics pipelines from rendering the graphical data from the graphics application.

6791553, Sep 14, 2004

Nov 17, 2000

09/715253

Kevin Lefebvre - Ft Collins CO
Don B. Hoffman - Fort Collins CO
Byron A Alcorn - Ft Collins CO
Joseph Norman Gee - Ft Collins CO

Hewlett-Packard Development Company, L.P. - Houston TX

G06T 120

345506, 345504, 345592, 345505

A graphical display system utilizes a plurality of graphics pipelines to efficiently display a jitter enhanced image. More specifically, the graphical display system utilizes a plurality of graphical pipelines, a compositor, and a display device. Each of the graphical pipelines receives and renders graphical data. In rendering the graphical data, each of the graphical pipelines mathematically combines a different offset to coordinate values included within the graphical data. The compositor receives the graphical data rendered by the plurality of pipelines and blends color values associated with corresponding coordinate values within the graphical data. The compositor also interfaces the blended color values with the display device, which displays an image based on at least the blended color values. As a result, graphical data defining a jitter enhanced image is efficiently rendered to the display device.

6864894, Mar 8, 2005

Nov 17, 2000

09/715746

Kevin Lefebvre - Ft Collins CO, US
Don B. Hoffman - Fort Collins CO, US
Jeffrey J Walls - Fort Collins CO, US
Joseph Norman Gee - Ft Collins CO, US

Hewlett-Packard Development Company, L.P. - Houston TX

G06T001/20

345506, 345 11

A graphical display system utilizes a plurality of display devices and a plurality of graphical acceleration units for rendering graphical data to the display devices. More specifically, each of the plurality of graphical acceleration units respectively interfaces a portion of graphical data defining an image to one of the display devices. Each of the display devices displays a portion of the image based on the graphical data rendered to it. To make the system more efficient and/or to improve image quality, at least one of the graphical acceleration units includes a plurality of graphical pipelines for rendering the graphical data to be displayed by the display device that is interfaced with the one graphical acceleration unit.

6882346, Apr 19, 2005

Nov 17, 2000

09/715335

Kevin Lefebvre - Ft Collins CO, US
Don B. Hoffman - Fort Collins CO, US
Joseph Norman Gee - Ft Collins CO, US
Jeffrey J Walls - Fort Collins CO, US
Byron A Alcorn - Ft Collins CO, US

Hewlett-Packard Development Company, L.P. - Houston TX

G06T001/20
G06G015/80

345506, 345505

A graphical display system utilizes a plurality of graphics pipelines to render data to a display device. More specifically, the graphical display system utilizes a first graphics pipeline, a second graphics pipeline, a compositor, and a display device. The first graphics pipeline renders a first portion of a graphical command, and the second graphics pipeline renders a second portion of a graphical command. The compositor receives the first and second portions of graphical data and interfaces the first and second portions with the display device. The display device then displays an image based on the first and second portions of graphical data respectively rendered by the first and second graphics pipelines. By enabling a plurality of graphics pipelines to render different portions of graphical data to the same display device, the speed and/or image quality associated with the image displayed by the display device can be improved.

7030891, Apr 18, 2006

May 9, 2003

10/436004

Byron A Alcorn - Ft Collins CO, US
Joseph Norman Gee - Ft Collins CO, US
Kevin Lefebvre - Ft Collins CO, US
Don B. Hoffman - Fort Collins CO, US

Hewlett-Packard Development Company, L.P. - Houston TX

G09G 5/00

345629, 345539, 345593, 345594, 345597

A preferred method includes the step of receiving multiple digital video data streams. Preferably, a first of the multiple digital video data streams contains processed pixel data corresponding to at least a portion of the image to be rendered, and a second of the multiple digital video data streams contains processed pixel data corresponding to at least a portion of the image to be rendered as well as information, such as a chroma-key value, associated with at least some of the processed pixel data. The embodiment also preferably includes the step of combining the multiple digital video data streams into the composite digital video data stream by referencing the chroma-key values. Devices also are provided.