Patents by Inventor Michael Tidwell
Michael Tidwell 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: 7230583Abstract: In a scanning display apparatus an image signal source produces an image signal. A light emitter is coupled to the image signal source and responsive to the image signal to emit light. A lensing system receives light from the light emitter and passes exiting light. A scanner scans the image light. A light sensor detects intensity of background light. A controller adjusts intensity of the image light in response to the detected background light intensity.Type: GrantFiled: April 15, 2004Date of Patent: June 12, 2007Assignee: University of WashingtonInventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Publication number: 20060077121Abstract: Apparent distance of a pixel within an optical field of view is determined. Incoming light is scanned along a raster pattern to direct light for a select pixel onto a light distance detector. The distance is sampled for each pixel or for a group of pixels. The light distance detector includes a concentric set of rings sensors. The larger the spot of light corresponding to the pixel, the more rings are impinged. The diameter of the spot is proportional to the distance at which the light originated (e.g., light source or object from which light was reflected). Alternatively, a variable focus lens (VFL) adjusts focal length for a given pixel to achieve a standard spot size. The distance at which the light originated correlates to the focal length of the VFL.Type: ApplicationFiled: November 28, 2005Publication date: April 13, 2006Applicant: University of WashingtonInventors: Charles Melville, Michael Tidwell, Richard Johnston, Joel Kollin
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Patent number: 6977631Abstract: Apparent distance of a pixel within an optical field of view is determined. Incoming light is scanned along a raster pattern to direct light for a select pixel onto a light distance detector. The distance is sampled for each pixel or for a group of pixels. The light distance detector includes a concentric set of rings sensors. The larger the spot of light corresponding to the pixel, the more rings are impinged. The diameter of the spot is proportional to the distance at which the light originated (e.g., light source or object from which light was reflected). Alternatively, a variable focus lens (VFL) adjusts focal length for a given pixel to achieve a standard spot size. The distance at which the light originated correlates to the focal length of the VFL.Type: GrantFiled: September 17, 2002Date of Patent: December 20, 2005Assignee: University of WashingtonInventors: Charles D. Melville, Michael Tidwell, Richard S. Johnston, Joel S. Kollin
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Publication number: 20040196213Abstract: In a scanning display apparatus an image signal source produces an image signal. A light emitter is coupled to the image signal source and responsive to the image signal to emit light. A lensing system receives light from the light emitter and passes exiting light. A scanner scans the image light. A light sensor detects intensity of background light. A controller adjusts intensity of the image light in response to the detected background light intensity.Type: ApplicationFiled: April 15, 2004Publication date: October 7, 2004Applicant: UNIVERSITY OF WASHINGTONInventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Patent number: 6734835Abstract: In a scanning display apparatus an image signal source produces an image signal. A light emitter is coupled to the image signal source and responsive to the image signal to emit light. A lensing system receives light from the light emitter and passes exiting light. A scanner scans the image light. A light sensor detects intensity of background light. A controller adjusts intensity of the image light in response to the detected background light intensity.Type: GrantFiled: February 3, 2003Date of Patent: May 11, 2004Assignee: University of WashingtonInventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Publication number: 20030142042Abstract: In a scanning display apparatus an image signal source produces an image signal. A light emitter is coupled to the image signal source and responsive to the image signal to emit light. A lensing system receives light from the light emitter and passes exiting light. A scanner scans the image light. A light sensor detects intensity of background light. A controller adjusts intensity of the image light in response to the detected background light intensity.Type: ApplicationFiled: February 3, 2003Publication date: July 31, 2003Applicant: University of WashingtonInventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Patent number: 6538625Abstract: In a scanning display apparatus an image signal source produces an image signal. A light emitter is coupled to the image signal source and responsive to the image signal to emit light. A lens receives light from the light emitter and passes exiting light, the exiting light having a focal distance. A controller alters the index of refraction of lens to alter the focal distance of the exiting light.Type: GrantFiled: March 5, 2002Date of Patent: March 25, 2003Assignee: University of WashingtonInventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Publication number: 20030016187Abstract: Apparent distance of a pixel within an optical field of view is determined. Incoming light is scanned along a raster pattern to direct light for a select pixel onto a light distance detector. The distance is sampled for each pixel or for a group of pixels. The light distance detector includes a concentric set of rings sensors. The larger the spot of light corresponding to the pixel, the more rings are impinged. The diameter of the spot is proportional to the distance at which the light originated (e.g., light source or object from which light was reflected). Alternatively, a variable focus lens (VFL) adjusts focal length for a given pixel to achieve a standard spot size. The distance at which the light originated correlates to the focal length of the VFL.Type: ApplicationFiled: September 17, 2002Publication date: January 23, 2003Applicant: University of WashingtonInventors: Charles D. Melville, Michael Tidwell, Richard S. Johnston, Joel S. Kollin
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Patent number: 6492962Abstract: Apparent distance of a pixel within an optical field of view is determined. Incoming light is scanned along a raster pattern to direct light for a select pixel onto a light distance detector. The distance is sampled for each pixel or for a group of pixels. The light distance detector includes a concentric set of rings sensors. The larger the spot of light corresponding to the pixel, the more rings are impinged. The diameter of the spot is proportional to the distance at which the light originated (e.g., light source or object from which light was reflected). Alternatively, a variable focus lens (VFL) adjusts focal length for a given pixel to achieve a standard spot size. The distance at which the light originated correlates to the focal length of the VFL.Type: GrantFiled: December 18, 2000Date of Patent: December 10, 2002Assignee: University of WashingtonInventors: Charles D. Melville, Michael Tidwell, Richard S. Johnston, Joel S. Kollin
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Publication number: 20020093467Abstract: In a scanning display apparatus an image signal source produces an image signal. A light emitter is coupled to the image signal source and responsive to the image signal to emit light. A lens receives light from the light emitter and passes exiting light, the exiting light having a focal distance. A controller alters the index of refraction of lens to alter the focal distance of the exiting light.Type: ApplicationFiled: March 5, 2002Publication date: July 18, 2002Applicant: University of WashingtonInventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Patent number: 6388641Abstract: A scanning beam display controls the curvature of scanning light wave impinging on the eye to simulate image points of differing depth. To simulate an object at a far distance the generated light waves are flatter. To simulate closer objects, the light wave curvature increases. When changing the curvature of the light waves, the eye responds by altering its focus. The curvature of the light waves thus determines the apparent focal distance from the eye to the virtual object. To vary the curvature, either a variable focus lens or a variable index of refraction device is used. Alternatively, a moving point source is used. The generated apparent distance of a virtual object is correlated to a detected distance in a background field of view. Intensity of the virtual object is correlated to detected intensity of background light.Type: GrantFiled: July 3, 2001Date of Patent: May 14, 2002Assignee: University of WashingtonInventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Patent number: 6352344Abstract: A scanned retinal display includes an optical scanning array to generate multiple exit pupils in conjunction with an eyepiece. The multiple exit pupils expand the effective exit pupil. As a user moves their eye the eye moves from one exit pupil to another. A scanning array creates the multiple exit pupils to maintain a clear line of sight for an augmented display. Also, a viewer's eye position is tracked. To achieve a larger effective exit pupil and the pin hole effect advantage of a small exit pupil, only one exit pupil of the multiple pupils is active to enter the user's eye.Type: GrantFiled: February 14, 2001Date of Patent: March 5, 2002Assignee: University of WashingtonInventor: Michael Tidwell
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Publication number: 20010040535Abstract: A scanning beam display controls the curvature of scanning light wave impinging on the eye to simulate image points of differing depth. To simulate an object at a far distance the generated light waves are flatter. To simulate closer objects, the light wave curvature increases. When changing the curvature of the light waves, the eye responds by altering its focus. The curvature of the light waves thus determines the apparent focal distance from the eye to the virtual object. To vary the curvature, either a variable focus lens or a variable index of refraction device is used. Alternatively, a moving point source is used. The generated apparent distance of a virtual object is correlated to a detected distance in a background field of view. Intensity of the virtual object is correlated to detected intensity of background light.Type: ApplicationFiled: July 3, 2001Publication date: November 15, 2001Inventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Patent number: 6281862Abstract: A scanning beam display controls the curvature of scanning light wave impinging on the eye to simulate image points of differing depth. To simulate an object at a far distance the generated light waves are flatter. To simulate closer objects, the light wave curvature increases. When changing the curvature of the light waves, the eye responds by altering its focus. The curvature of the light waves thus determines the apparent focal distance from the eye to the virtual object. To vary the curvature, either a variable focus lens or a variable index of refraction device is used. Alternatively, a moving point source is used. The generated apparent distance of a virtual object is correlated to a detected distance in a background field of view. Intensity of the virtual object is correlated to detected intensity of background light.Type: GrantFiled: November 9, 1998Date of Patent: August 28, 2001Assignee: University of WashingtonInventors: Michael Tidwell, Charles D. Melville, Richard S. Johnston, Joel S. Kollin
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Publication number: 20010011968Abstract: A scanned retinal display includes an optical scanning array to generate multiple exit pupils in conjunction with an eyepiece. The multiple exit pupils expand the effective exit pupil. As a user moves their eye the eye moves from one exit pupil to another. A scanning array creates the multiple exit pupils to maintain a clear line of sight for an augmented display. Also, a viewer's eye position is tracked. To achieve a larger effective exit pupil and the pin hole effect advantage of a small exit pupil, only one exit pupil of the multiple pupils is active to enter the user's eye.Type: ApplicationFiled: February 14, 2001Publication date: August 9, 2001Inventor: Michael Tidwell
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Publication number: 20010001240Abstract: Apparent distance of a pixel within an optical field of view is determined. Incoming light is scanned along a raster pattern to direct light for a select pixel onto a light distance detector. The distance is sampled for each pixel or for a group of pixels. The light distance detector includes a concentric set of rings sensors. The larger the spot of light corresponding to the pixel, the more rings are impinged. The diameter of the spot is proportional to the distance at which the light originated (e.g., light source or object from which light was reflected). Alternatively, a variable focus lens (VFL) adjusts focal length for a given pixel to achieve a standard spot size. The distance at which the light originated correlates to the focal length of the VFL.Type: ApplicationFiled: December 18, 2000Publication date: May 17, 2001Inventors: Charles D. Melville, Michael Tidwell, Richard S. Johnston, Joel S. Kollin
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Patent number: 6204832Abstract: A point source array generates an array of output beams defining a plurality of image pixels. A microlens array receives the output beams and direct them toward desired pixel locations. Either one or both of the point source array and microlens array are scanned over time to form an image of pixels. An image is composed of an array of image portions. Each image portion includes a plurality of pixels. For each image portion, there is a corresponding point source of light and a corresponding microlens. The corresponding point source and microlens scan light within the area of the image portion to generate all of the pixels for such image portion. The microlens array is an integral array. Each lens moves together with each image portion being scanned concurrently by the microlens array an point source array.Type: GrantFiled: May 4, 1998Date of Patent: March 20, 2001Assignee: University of WashingtonInventors: Charles D. Melville, Michael Tidwell, Richard S. Johnston
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Patent number: 6204829Abstract: A scanned retinal display includes an optical scanning array to generate multiple exit pupils in conjunction with an eyepiece. The multiple exit pupils expand the effective exit pupil. As a user moves their eye the eye moves from one exit pupil to another. A scanning array creates the multiple exit pupils to maintain a clear line of sight for an augmented display. Also, a viewer's eye position is tracked. To achieve a larger effective exit pupil and the pin hole effect advantage of a small exit pupil, only one exit pupil of the multiple pupils is active to enter the user's eye.Type: GrantFiled: March 27, 2000Date of Patent: March 20, 2001Assignee: University of WashingtonInventor: Michael Tidwell
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Patent number: 6191761Abstract: Apparent distance of a pixel within an optical field of view is determined. Incoming light is scanned along a raster pattern to direct light for a select pixel onto a light distance detector. The distance is sampled for each pixel or for a group of pixels. The light distance detector includes a concentric set of rings sensors. The larger the spot of light corresponding to the pixel, the more rings are impinged. The diameter of the spot is proportional to the distance at which the light originated (e.g., light source or object from which light was reflected). Alternatively, a variable focus lens (VFL) adjusts focal length for a given pixel to achieve a standard spot size. The distance at which the light originated correlates to the focal length of the VFL.Type: GrantFiled: November 9, 1998Date of Patent: February 20, 2001Assignee: University of WashingtonInventors: Charles D. Melville, Michael Tidwell, Richard S. Johnston, Joel S. Kollin
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Patent number: 6046720Abstract: A scanning display device directly scans a light source along at least one scanning path, rather than scanning a light beam emitted from such source along such scanning path. By scanning the light source a smaller, lighter weight scanner without a mirror can be used to achieve light source scanning along the desired scan path. A resonant cantilever translates one or more point sources (e.g., one for a monochromatic display; red, green and blue for an RGB display). The cantilever motion is driven by an electromagnetic drive circuit or by a piezoelectric drive actuator. The light source is one or more light emitting diode point sources, one or more a fiber optic point sources, or one or more light emitting polymer light sources.Type: GrantFiled: May 4, 1998Date of Patent: April 4, 2000Assignee: University of WashingtonInventors: Charles D. Melville, Michael Tidwell