Patents by Inventor Duane S. Dewald
Duane S. Dewald has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9398223Abstract: 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.Type: GrantFiled: April 8, 2014Date of Patent: July 19, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Steven M. Penn, Duane S. Dewald, Matthew G. Hine
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Publication number: 20140240573Abstract: 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.Type: ApplicationFiled: April 8, 2014Publication date: August 28, 2014Applicant: Texas Instruments IncorporatedInventors: Steven M. Penn, Duane S. Dewald, Matthew G. Hine
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Patent number: 8690340Abstract: 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.Type: GrantFiled: December 12, 2008Date of Patent: April 8, 2014Assignee: Texas Instruments IncorporatedInventors: Steven M. Penn, Duane S. Dewald, Matthew G. Hine
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Publication number: 20100149493Abstract: 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.Type: ApplicationFiled: December 12, 2008Publication date: June 17, 2010Applicant: Texas Instruments IncorporatedInventors: Steven M. Penn, Duane S. Dewald, Matthew G. Hine
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Patent number: 7364326Abstract: A method for transmitting light in an image display system includes generating a first cone of light from a first light source. The first cone of light includes a plurality of light beams. A first portion of the first cone is projected in an illumination path. A second portion of the first cone is projected at a surface of a reflector. The second portion of the first cone is reflected to project the second portion of the first cone in the illumination path. The first and second portions of the first cone are received at an entrance of an integrator rod. The second portion of the first cone increases the intensity of light received by the integrator rod.Type: GrantFiled: December 6, 2004Date of Patent: April 29, 2008Assignee: Texas Instruments IncorporatedInventors: Duane S. Dewald, Steven M. Penn
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Patent number: 7252391Abstract: A method of producing an image comprising impinging a beam of light on first region of a dynamic filter. The dynamic filter comprising at least two regions having different light transmission characteristics. A first region of the dynamic filter transmits a first transmitted portion of the beam of light and reflects a first reflected portion of the beam of light. Impinging at least some of the first reflected portion of the beam of light on a second region of the dynamic filter. The second region of the dynamic filter transmitting a second transmitted portion. The first and second transmitted portions are modulated.Type: GrantFiled: June 27, 2006Date of Patent: August 7, 2007Assignee: Texas Instruments IncorporatedInventors: Duane S. Dewald, Steven M. Penn, Michael T. Davis
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Patent number: 7066605Abstract: A sequential color display system using a white light source to create a full color image projected onto an image plane. A dynamic filter, typically a series of moving dichroic filters, generates a series of primary colored light beams that are swept across the surface of a spatial light modulator. Typically all three primary colors are produced simultaneously by the dynamic filter. The illuminated portion of the dynamic filter is imaged onto the modulator and controller provides appropriate image data for each portion of the modulator in synchronization with the sweep of the primary color bands across the modulator surface. The primary color bands are modulated by the spatial light modulator and the modulated light is focused by lens onto the image plane. The viewer integrates the light arriving at each portion of the image plane over a frame period to provide the perception of a full-color image.Type: GrantFiled: August 3, 2004Date of Patent: June 27, 2006Assignee: Texas Instruments IncorporatedInventors: Duane S. Dewald, Steven M. Penn, Michael T. Davis
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Patent number: 6857751Abstract: 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.Type: GrantFiled: December 20, 2002Date of Patent: February 22, 2005Assignee: Texas Instruments IncorporatedInventors: Steven M. Penn, Duane S. Dewald, Terry Bartlett
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Patent number: 6771325Abstract: A sequential color display system using a white light source (202) to create a full color image projected onto an image plane (214). A dynamic filter (206), typically a series of moving dichroic filters, generates a series of primary colored light beams that are swept across the surface of a spatial light modulator (210). Light rejected by the dynamic filter (206) enters a light recycler (204) and is reapplied to the dynamic filter (206). The light recycler is typically one or more reflective surfaces, including mirrors, baffles, enclosures, lamp reflectors, TIR surfaces, or specially coated material arranged in such a way as to encourage light toward an aperture separating the light recycler (204) and the dynamic filter (206). Typically all three primary colors are produced simultaneously by the dynamic filter (206).Type: GrantFiled: November 3, 2000Date of Patent: August 3, 2004Assignee: Texas Instruments IncorporatedInventors: Duane S. Dewald, Steven M. Penn, Michael T. Davis
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Publication number: 20040119950Abstract: 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.Type: ApplicationFiled: December 20, 2002Publication date: June 24, 2004Inventors: Steven M. Penn, Duane S. Dewald, Terry Bartlett
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Patent number: 6317171Abstract: 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).Type: GrantFiled: September 16, 1998Date of Patent: November 13, 2001Assignee: Texas Instruments IncorporatedInventor: Duane S. Dewald
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Patent number: 6249387Abstract: An optical system for illumination spatial light modulators. The optical system includes a tall color splitting prism (16) with substantially symmetrical face bonding areas, thereby eliminating the need for external holding plates. The face bonding areas (62) are outside the optically active area. The tall prism (16) allows for better control of stray light, including a heat sink (41) for absorbing stray or OFF state light, preventing overheating of the optical assembly. The tall prism (16) also allows adjustments to be made to any other optical components such as projection lenses and TIR prisms (14).Type: GrantFiled: May 6, 1999Date of Patent: June 19, 2001Assignee: Texas Instruments IncorporatedInventors: Frank J. Poradish, Duane S. Dewald, Steven M. Penn
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Patent number: 5930050Abstract: An anamorphic lens (11) for use in a display system (10) that has a spatial light modulator (12) and a projection lens (13) and that projects images to a screen (14). The anamorphic lens (11) is placed between the projection lens (13) and the screen (14). The spatial light modulator (12) generates an image that is anamorphically squeezed in the horizontal dimension, and the anamorphic lens (11) widens the image so that the viewer perceives a normal wide-screen image on the screen (14).Type: GrantFiled: September 16, 1998Date of Patent: July 27, 1999Assignee: Texas Instruments IncorporatedInventor: Duane S. Dewald
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Patent number: 5566387Abstract: A disk-based holographic storage media includes a disk fabricated from a holographic storage media. A plurality of holographic storage regions are defined within the storage media such that pages of holographic data can be stored therein in the form of an interference grating. A Read/Write head is provided for containing the optics necessary to read information from the holographic storage region and write information thereto. The Read/Write head moves along the radial direction of the disk with the disk stepped by a motor to discrete angular positions, comprising the address of the storage region along with radial positioning of the Read/Write head. Each of the storage regions is diamond-shaped and oriented such that the apexes thereof are oriented along a common radial column line. Adjacent columns have the storage regions disposed in alternating rows or tracks. This allows for a higher packing density.Type: GrantFiled: June 15, 1994Date of Patent: October 15, 1996Assignee: Tamarack Storage DevicesInventor: Duane S. Dewald
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Patent number: 5526337Abstract: A package for a holographic storage media disk (10) is provided that is comprised of a super structure (18) that is operable to hold the disk (10). The disk (10) is comprised of a photopolymer material that is formed in a disk-shaped member having a hub (14) disposed at the center thereof. The disk (10) is disposed in the structure (18) and then a cover (24) disposed thereover, the cover (24) being opaque. An access opening (28) is disposed within the cover (24) to allow access to the surface of the disk (10). A hub opening (26) is provided for allowing access to the hub (14). The hub (14) is disposed such that there is a light tight seal relative to the cover (24). A door (32) is provided for reciprocating over the opening (28) to light seal the package when data is not being recorded to the disk (10) or read therefrom.Type: GrantFiled: June 30, 1994Date of Patent: June 11, 1996Assignee: Tamarack Storage DevicesInventors: Randal Housey, Vincent D. McCarty, Dan Swindler, Lindsay Gupton, Duane S. Dewald
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Patent number: 5481523Abstract: A holographic storage system includes a storage media in the form of a disk that is operable to incrementally rotate under a moveable optics system contained in a gantry. The gantry reciprocates along the radial axis of the media in response to a drive mechanism. A laser is operable to direct a beam to a mirror that reflects the light beam along the reciprocating axis of the gantry. The gantry contains a spatial light modulator which is operable to receive the incoming light beam and transform it through a transform lens down to a storage location on the surface of the storage media. A reference beam is reflected from a reflecting surface at a predetermined angle and directed to the storage location by an elliptical mirror to interfere with the data beam and perform a record operation. During data reconstruction, when the reference beam is generated a reconstructed data beam is directed toward the reconstruction optics and a detector array. The detector array is also contained on the gantry.Type: GrantFiled: December 23, 1993Date of Patent: January 2, 1996Assignee: Tamarack Storage DevicesInventor: Duane S. Dewald
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Patent number: 5365288Abstract: An image mover having a reduced sizing for the steering mirror and rotator assembly and associated components and motors is disclosed. The image mover comprises a relay lens to collimate and relay angular information of the light image from the projector scanning mirror. Rotators, such as K-mirror, pechan prism or dove prism, rotate the collimated image responsive to horizontal movement of the image. A restoring lens, which can either be a fixed focal length or a zoom lens, restores the collimated light image proportional to the angular information of the image produced by the projector. The restored diverging image is projected to a steering mirror and steered onto a viewing surface in real time.Type: GrantFiled: March 14, 1994Date of Patent: November 15, 1994Assignee: Advanced Laser Projection, Inc.Inventors: Duane S. Dewald, Lloyd G. Cross, Paul A. Linden
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Patent number: 4932755Abstract: An optical transparency adapted to substantially attenuate electromagnetic pulses incident on it, yet transmit visible light with minimal distraction being caused by Fraunhofer diffraction. The transparency includes a transparent sheet and a laminated, electrically-conductive grid that defines a densely-packed array of apertures. Each aperture is a modified polygon having multiple curved sides, such that visible light from a remote point source of light is diffracted by the curved sides of each aperture over multiple, diverging, fan-like areas and minimal distraction to a person viewing through the transparency is thereby provided.Type: GrantFiled: October 12, 1988Date of Patent: June 12, 1990Assignee: Swedlow, Inc.Inventors: David W. Holdridge, Duane S. Dewald