DUANE SCOTT DEWALD
Pilots at Harvest Gln Dr, Dallas, TX

7651227, Jan 26, 2010

Sep 13, 2005

11/225327

Steven Monroe Penn - Plano TX, US
Duane Scott Dewald - Dallas TX, US
Ronald Allen Barry - Frisco TX, US

Texas Instruments Incorporated - Dallas TX

G03B 21/20, G03B 21/14, H04N 5/74, H04N 3/26, G02B 5/32, G02B 5/18, G02F 1/135

353102, 353 20, 353 84, 348771, 348345, 348745, 359 15, 359 20, 359568, 349 30

A method and apparatus for a projection display system includes a spatial light modulator and a volume illumination hologram. The spatial light modulator comprises a digital micromirror device, and the projection system includes a laser light source to produce a sequence of collimated, colored, light beams for the illumination hologram. Waste light produced by the spatial light modulator is transmitted to the illumination hologram, and the illumination hologram emits waste light from at least one of its edges. Waste light emitted from an edge of the illumination hologram is absorbed by a light sensor to control the intensity of the light beams. A projection focusing element is mounted proximate a side of the illumination hologram to focus the image beam from the spatial light modulator for viewing. A projection hologram is interposed between the side of the illumination hologram and the projection focusing element to manage waste light.

7537347, May 26, 2009

Nov 29, 2005

11/288679

Duane Scott Dewald - Dallas TX, US

Texas Instruments Incorporated - Dallas TX

G03B 21/14

353 38, 353 94, 362561, 362244

A method and system for combining light emitted by dispersed light sources for use in a projection display or similar system. A plurality of elongated and tapered light integrators are placed side by side forming an array, each having at their small input end a light source, such as an LED. Light collimated by each light integrator is further collimated by a convex lens disposed immediately at the output end of the light integrator. From the convex lenses, the light falls upon an array integrator, preferably a fly-eye type integrator, and passes through it to a second array integrator. Light emerging from the second array integrator is then passed through one or more relay lenses and falls upon a light modulator, such as a digital mircomirror device (DMD). The modulated light beam then passes through a projection lens and onto a visual image display screen. The display screen may, for example, be the screen of a high definition television (HDTV).

6317171, Nov 13, 2001

Sep 16, 1998

9/154425

Duane S. Dewald - Dallas TX

Texas Instruments Incorporated - Dallas TX

G02F 100, H04N 576

348756

A television receiver (10) that has a spatial light modulator (15) and a projection lens (17a) and that projects images to a screen (18). If the aspect ratio of the image to be displayed does not match that of the spatial light modulator (15), an anamorphic lens (17b) is positioned in the optical path of the image, between the projection lens (17b) and the screen (18). In this case and in typical applications, the spatial light modulator (15) generates an image that is anamorphically squeezed in the horizontal dimension, and the anamorphic lens (17b) widens the image so that the viewer perceives a normal wide-screen image on the screen (18).

2010002, Feb 4, 2010

Jul 30, 2008

12/220998

Duane Scott Dewald - Dallas TX, US

G03B 21/14, G02B 3/06, G03B 21/28

353 33, 359710, 353121

An optical element for compensating for aberrations in a projected image resulting from an air gap between adjacent segments of a separation prism includes a first surface and a second surface opposite said first surface. Each of the first and second surface define a portion of a cylinder having a radius and a cylindrical axis. The optical element is disposed between the separation prism and the projected image. A thickness of the optical element and the radius of the cylinder are selected to correspond to the aberration to be compensated and the cylindrical axis is oriented to correspond to the aberration to be compensated.

6857751, Feb 22, 2005

Dec 20, 2002

10/326237

Steven M. Penn - Plano TX, US
Duane S. Dewald - Dallas TX, US
Terry Bartlett - Dallas TX, US

Texas Instruments Incorporated - Dallas TX

G03B021/14

353 97, 353122

An image display system includes a light source capable of generating an illumination light beam along an illumination path. The system also includes a modulator operable to receive at least a portion of the illumination light beam and to selectively communicate at least some of the illumination light beam received by the modulator along a projection light path. The system further includes at least one adjustable illumination aperture operable to selectively control an amount of the at least a portion of the illumination light beam received by the modulator based at least in part on image data.

2010014, Jun 17, 2010

Dec 12, 2008

12/334240

Steven M. Penn - Plano TX, US
Duane S. Dewald - Dallas TX, US
Matthew G. Hine - Richardson TX, US

Texas Instruments Incorporated - Dallas TX

G03B 21/14

353 20

According to one embodiment of the present invention a method for capturing images on a screen is disclosed. The method includes directing light from a surface of a spatial light modular to an image field using a projection system; capturing light from the image field using the projection system, the projection system directing at least a portion of the captured light to the spatial light modulator; and directing at least a portion of the received captured light to an image capture system using the spatial light modulator.

6084703, Jul 4, 2000

Jan 11, 1999

9/228811

Duane Scott Dewald - Dallas TX

Texas Instruments Incorporated - Dallas TX

G02B 2600

359290

An optical system for a spatial light modulator display system. The system includes a light integrator (20), the image of which is to be reproduced on at least one spatial light modulator (44). At least two vignetting apertures (24, 38) are used to frame light from said integrator (20), prior to reaching said modulator or modulators (44). The vignetting apertures(24, 38) reduce stray light and maintain uniformity and telecentricity of the system. This allows the system to use smaller optics for larger spatial light modulators that would normally require large optics, making the system cost prohibitive and of poor performance.

6880935, Apr 19, 2005

Dec 18, 2003

10/739820

Duane Scott Dewald - Dallas TX, US
Steven Penn - Plano TX, US

Texas Instruments Incorporated - Dallas TX

G03B021/14

353 81, 348771

A lens system for providing undistorted illumination image onto a light receiving surface such as a DMD™ (digital micromirror device) light modulator with a TIR (total internal reflection) prism arrangement by supporting the receiving face of the TIR prism arrangement at an angle with support to the principal plane of a focusing lens. The angle is used to vary the air gap between the focusing lens and the TIR prism arrangement such that the total or reflective optical path through the air gap and the TIR prism arrangement is a constant.

2012030, Dec 6, 2012

Jun 8, 2012

13/492753

Karel J. Zuzak - Arlington TX, US
Duane Scott Dewald - Dallas TX, US
William Boyd Werner - Austin TX, US
Brian Crowell - Austin TX, US

G01N 21/55, G01N 21/64, H04N 7/18

348143, 356445, 2504591, 348E07085

A system and method for visualizing a biological sample. One or more spectra are selected for illuminating the biological sample to indicate one or more chemicals in the biological sample. The biological sample is illuminated with the one or more spectra. Reflected light is analyzed to determine characteristics of the biological sample.

7052150, May 30, 2006

Dec 28, 2000

09/750640

Duane Scott Dewald - Dallas TX, US

Texas Instruments Incorporated - Dallas TX

G02B 5/08, G02B 7/182

359856, 362551

An integrating rod () for use with a multiple segment dynamic filter, such as a spiral dichroic color wheel having three or more narrow filters adjacent to the exit face () to enable the integrating rod to recapture light rejected by a given segment of the dynamic filter. The rejected light travels back through the integrating rod where a majority of the light strikes the mirrored entrance face (). Light reflected by the mirrored entrance face, or light exiting through the entrance aperture () and returning to the integrating rod after being reflected by the lamp reflector, once again travels to the exit face () of the integrating rod (). After exiting through the exit face () of the integrating rod () a second time, the recycled light has a good chance of striking a different filter segment of the dynamic filter and being used by the display system.