Daniel J Olsen

US Patent:

60942002, Jul 25, 2000

Filed:

Feb 6, 1998

Appl. No.:

9/020189

Inventors:

Daniel M. Olsen - Fort Collins CO
Noel D. Scott - Fort Collins CO
Robert J. Casey - Fort Collins CO

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G06T 1540

US Classification:

345422

Abstract:

An occlusion culling circuit for use in a graphics computer receives graphics primitives data including x and y coordinates for each pixel, a z depth value, and r, g, b, and a or index color data. For each group of primitives, the graphics computer scans the primitive and determines a volume which completely bounds the primitive. The z depth values for the pixels comprising the bounding volume are then compared by the occlusion culling circuit to the depths of the pixels in the already rendered primitives to determine whether any pixels in the incoming primitive are visible. If no pixels are visible, the occlusion culling circuit clears the result register and receives the next graphics primitive. If, on the other hand, one or more pixels is visible, the occlusion culling circuit completely renders the primitives bounded by the bounding volume. Since the graphics primitives which are totally occluded can bypass the more intensive pixel by pixel processing and storage, the speed and efficiency of the graphics computer can be significantly increased.

US Patent:

57512914, May 12, 1998

Filed:

Jul 26, 1996

Appl. No.:

8/690433

Inventors:

Daniel M. Olsen - Fort Collins CO
Noel D. Scott - Fort Collins CO
Robert J. Casey - Fort Collins CO

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G06T 1540

US Classification:

345422

Abstract:

An occlusion culling circuit for use in a graphics computer receives graphics primitives data including x and y coordinates for each pixel, a z depth value, and r, g, b, and a or index color data. For each group of primitives, the graphics computer scans the primitive and determines a volume which completely bounds the primitive. The z depth values for the pixels comprising the bounding volume are then compared by the occlusion culling circuit to the depths of the pixels in the already rendered primitives to determine whether any pixels in the incoming primitive are visible. If no pixels are visible, the occlusion culling circuit clears the result register and receives the next graphics primitive. If, on the other hand, one or more pixels is visible, the occlusion culling circuit completely renders the primitives bounded by the bounding volume. Since the graphics primitives which are totally occluded can bypass the more intensive pixel by pixel processing and storage, the speed and efficiency of the graphics computer can be significantly increased.

US Patent:

20220178300, Jun 9, 2022

Filed:

Feb 24, 2022

Appl. No.:

17/680074

Inventors:

- Vienna VA, US
Daniel B. OLSEN - Fort Collins CO, US
Randall R. RAYMER - Howard OH, US
Michael P. WHELAN - Naperville IL, US

International Classification:

F02B 19/12
F02B 19/18

Abstract:

Systems, devices, and methods described herein provide one or more radical chemicals generators (RCGs) and/or mini-chambers (M-Cs) that can be used to provide enhanced radical ignition (ERI) in an internal combustion engine. RCGs as described herein can include quenching systems (QSs) that can be configured to quench a flame of combustion products to produce a jet of partial combustion products containing radical species (RS). The jet of partial combustion products can be injected to a main combustion chamber (MCC) of an engine to induce ERI. ERI can proceed under leaner fuel conditions and lower temperatures compared to those needed for conventional thermally induced, fuel oxidation chain initiation reaction processes.

US Patent:

20230042331, Feb 9, 2023

Filed:

Oct 10, 2022

Appl. No.:

17/962660

Inventors:

- Vienna VA, US
Daniel B. OLSEN - Fort Collins CO, US
Randall R. RAYMER - Howard OH, US
Michael P. WHELAN - Naperville IL, US

Assignee:

Radical Combustion Technologies, LLC - Vienna VA

International Classification:

F02B 19/12
F02B 19/18

Abstract:

Systems, devices, and methods described herein provide one or more radical chemicals generators (RCGs) and/or mini-chambers (M-Cs) that can be used to provide enhanced radical ignition (ERI) in an internal combustion engine. RCGs as described herein can include quenching systems (QSs) that can be configured to quench a flame of combustion products to produce a jet of partial combustion products containing radical species (RS). The jet of partial combustion products can be injected to a main combustion chamber (MCC) of an engine to induce ERI. ERI can proceed under leaner fuel conditions and lower temperatures compared to those needed for conventional thermally induced, fuel oxidation chain initiation reaction processes.