David Smith
Architects in Cary, NC

5414801, May 9, 1995

Jun 11, 1991

7/714387

David A. Smith - Cary NC
David W. Easter - Raleigh NC

Virtus Corporation - Cary NC

G06F 1562

395119

A three-dimensional space may be rendered in a computer graphics system by representing the three-dimensional space as a plurality of convex polyhedra and representing the containment relationships among the plurality of convex polyhedra. Connection relationships among the convex polyhedra, including the location of holes in the connected surfaces, are also preferably represented. Containment and connection relationships are preferably represented using a containment logical tree and a connection logical graph. Three-dimensional graphics representations can thereby be rendered in a real time using a low cost, graphics processor. Efficient movement through three-dimensional space along all six degrees of freedom is also provided by using a two-dimensional pointing device, preferably a mouse, in combination with a function selector, preferably a pair of keys on the mouse. Use of the mouse without the function selection keys allows movement in a first plane in the three-dimensional space rendition, and use of the mouse in combination with the first function selection key allows movement in a second plane in the three-dimensional space rendition. Use of the mouse in combination with the second function key allows rotation in three-dimensional space rendition.

2012012, May 17, 2012

Aug 17, 2011

13/211365

Gregory A. Harrison - Oviedo FL, US
David Alan Smith - Cary NC, US
Gary E. Wiese - Winter Park FL, US

LOCKHEED MARTIN CORPORATION - Bethesda MD

G02B 27/01

359630

Head-mounted displays () are disclosed which include a frame (), an image display system () supported by the frame (), and a Fresnel lens system () supported by the frame (). The HMD () can employ a reflective optical surface, e.g., a free-space, ultra-wide angle, reflective optical surface (a FS/UWA/RO surface) (), supported by the frame (), with the Fresnel lens system () being located between the image display system () and the reflective optical surface (). The Fresnel lens system () can include at least one curved Fresnel lens element (). Fresnel lens elements () for use in HMDs are also disclosed which have facets () separated by edges () which lie along radial lines () which during use of the HMD pass through a center of rotation () of a nominal user's eye () or through the center of the eye's lens () or are normal to the surface of the eye's cornea.

5841441, Nov 24, 1998

Jan 19, 1996

8/588997

David A. Smith - Cary NC

Virtus Corporation - Cary NC

G06T 1730

345430

A three-dimensional texture is mapped onto a graphically-displayed surface by interpolating locations for elements of the texture using an associated distance relationship which locates the element with respect to the surface and a reference location spaced a distance apart from the surface. A first array of points representing the surface are stored, each of the points having an element of the three-dimensional texture and a distance to the element associated therewith. Upon a command to move the displayed surface, a new location for each point of the first array is computed, to obtain a second array representing the moved surface. A location for each element of the three-dimensional texture associated with each point of the first array is interpolated from the corresponding point in the second array and a reference location spaced apart from the moved surface.

2012015, Jun 21, 2012

Dec 15, 2011

13/327217

Gregory A. Harrison - Oviedo FL, US
David Alan Smith - Cary NC, US

Lockheed Martin Corporation - Bethesda MD

G02B 27/01, G02B 27/12

359619

A display assembly () includes: (a) an image display system () which includes an array of pixels () and (b) an array of pixel lenses (). The array of pixel lenses has each lens positioned to collimate or substantially collimate light from a corresponding single pixel of the array of pixels. The display assembly () is used in a head-mounted display apparatus () which includes a frame () to support the display assembly () a desired distance from a user's eyes. The head-mounted display apparatus may also include a beam splitter () to reflect images from the display assembly () to the user's eyes. The head-mounted display apparatus may provide a wide field of view to the user and may be of the augmented-reality or immersive type.

2012015, Jun 21, 2012

Dec 16, 2010

12/969901

David Alan Smith - Cary NC, US
Randel A. Crowe - Interlachen FL, US

LOCKHEED MARTIN CORPORATION - Orlando FL

G09B 19/00

434219

An exoskeleton that typically provides human power and endurance augmentation is adapted for use with a simulator system that generates a virtual environment by accepting and processing commands from the simulator to implement gross motor virtual feedback in which some motions of the exoskeleton's wearer (called the “pilot”) are constrained by the exoskeleton to simulate the interaction of the pilot with virtual objects in the virtual environment. In this way, the pilot can interact with virtual objects generated by the simulator system not only visually but through touch as well. For example, a pilot in a combat simulation can move along a virtual wall by feel while maintaining cover from enemy fire and perform actions like pushing virtual objects to clear obstacles from a path.

2012012, May 17, 2012

Aug 17, 2011

13/211372

Gregory A. Harrison - Oviedo FL, US
David Alan Smith - Cary NC, US
Gary E. Wiese - Winter Park FL, US

LOCKHEED MARTIN CORPORATION - Bethesda MD

G02B 27/01, G06F 17/50

359631, 703 1

Head-mounted displays () are disclosed which include a frame (), an image display system () supported by the frame (), and a reflective surface, e.g., a free-space, ultra-wide angle, reflective optical surface (a FS/UWA/RO surface) (), supported by the frame (). In certain embodiments, the reflective surface () produces spatially-separated virtual images that are angularly separated by at least 100, 150, or 200 degrees. Methods and apparatus for designing reflective optical surfaces, including FS/UWA/RO surfaces, for use in head-mounted displays () are also disclosed.

2012012, May 17, 2012

Aug 17, 2011

13/211389

Gregory A. Harrison - Oviedo FL, US
David Alan Smith - Cary NC, US
Gary E. Wiese - Winter Park FL, US

LOCKHEED MARTIN CORPORATION - Bethesda MD

G06F 17/50

703 1

Computer-based methods and associated computer systems are disclosed for designing free space reflective optical surfaces () for use in head-mounted displays (HMDs). The reflective optical surface () produces a virtual image of a display surface () for viewing by a user's eye (). The method includes using one or more computers to: (i) represent the display surface () by display objects (); (ii) represent the free space reflective optical surface () by surface elements (); and (iii) iteratively calculate spatial locations, normals, and radii of curvature for the surface elements () which will cause a virtual image of each display object () to be displayed to a nominal user's eye () in a desired direction of gaze of the eye ().

8570273, Oct 29, 2013

May 19, 2011

13/111476

David Alan Smith - Cary NC, US

Lockheed Martin Corporation - Bethesda MD

G09G 5/00, G09G 5/08, G06F 3/033, G06F 3/041

345156, 345161, 345173

An input device configured to control a communicatively coupled remote processor is disclosed. The input device includes a band that is configured to at least partially encircle a digit of a hand. A connection member suspends a platform above an exterior surface of the band. The platform is configured to be manipulated by a second digit of the hand. A processor is configured to determine event data based on the manipulation of the platform. The event data is transmitted via a radio frequency (RF) transmitter in a control signal to the communicatively coupled remote processor.