Margaret Ann Brown
Psychiatric at Aberdeen Ave, Seattle, WA
License number
Colorado 8505
Issued Date
Sep 20, 2004
Renew Date
Jul 1, 2005
Expiration Date
Jun 30, 2007
Type
Registered Psychotherapist
Address
Address
949 Aberdeen Ave NE APT A302, Seattle, WA 98056
Professional information
Apparatuses And Methods For Utilizing Non-Ideal Light Sources
US Patent:
2008006, Mar 13, 2008
Filed:
Jul 19, 2007
Appl. No.:
11/880225
Inventors:
Margaret Brown - Seattle WA, US
Voytek Andron - North Bend WA, US
David Skurnik - Kirkland WA, US
Eric Altendorf - Edmonds WA, US
Martin Kykta - Austin TX, US
Mark Holton - Everett WA, US
Clarence Tegreene - Bellevue WA, US
Christopher Wiklof - Everett WA, US
Voytek Andron - North Bend WA, US
David Skurnik - Kirkland WA, US
Eric Altendorf - Edmonds WA, US
Martin Kykta - Austin TX, US
Mark Holton - Everett WA, US
Clarence Tegreene - Bellevue WA, US
Christopher Wiklof - Everett WA, US
Assignee:
Microvision, Inc. - Redmond WA
International Classification:
G09G 3/36
US Classification:
345207000, 345007000
Abstract:
A method includes obtaining a measurement of a property of a light source, scanning light from the light source onto a surface, such that the light interacts with the surface, detecting light from the surface to create a picture element, and correcting the picture element with the measurement of the property. An apparatus includes a scanned beam display, the scanned beam display is configured to receive a signal and to scan the signal for viewing by a user. The signal is to contain picture element information. The picture element information includes information for a plurality of colors, wherein information for at least one color is corrected to substantially remove a perturbation to the picture element information, such that an image containing the picture element information will be substantially unchanged by the perturbation.
Apparatuses And Methods For Utilizing Non-Ideal Light Sources
US Patent:
7262765, Aug 28, 2007
Filed:
Sep 2, 2004
Appl. No.:
10/933003
Inventors:
Margaret Brown - Seattle WA, US
Voytek Andron - North Bend WA, US
David Skurnik - Kirkland WA, US
Eric Altendorf - Edmonds WA, US
Martin Kykta - Woodinville WA, US
Mark A. Holton - Everett WA, US
Clarence T. Tegreene - Bellevue WA, US
Christopher A. Wiklof - Everett WA, US
Voytek Andron - North Bend WA, US
David Skurnik - Kirkland WA, US
Eric Altendorf - Edmonds WA, US
Martin Kykta - Woodinville WA, US
Mark A. Holton - Everett WA, US
Clarence T. Tegreene - Bellevue WA, US
Christopher A. Wiklof - Everett WA, US
Assignee:
Microvision, Inc. - Redmond WA
International Classification:
G09G 3/36
US Classification:
345207, 345 63, 345 89, 345204, 345690, 359204, 359292
Abstract:
A method includes obtaining a measurement of a property of a light source, scanning light from the light source onto a surface, such that the light interacts with the surface, detecting light from the surface to create a picture element, and correcting the picture element with the measurement of the property. An apparatus includes a scanned beam display, the scanned beam display is configured to receive a signal and to scan the signal for viewing by a user. The signal is to contain picture element information. The picture element information includes information for a plurality of colors, wherein information for at least one color is corrected to substantially remove a perturbation to the picture element information, such that an image containing the picture element information will be substantially unchanged by the perturbation.
Scanned Proximity Detection Method And Apparatus For A Scanned Image Projection System
US Patent:
8251517, Aug 28, 2012
Filed:
Nov 9, 2009
Appl. No.:
12/615138
Inventors:
Gregory T. Gibson - Snohomish WA, US
Joshua M. Hudman - Sammamish WA, US
Margaret K. Brown - Seattle WA, US
Christian Dean DeJong - Sammamish WA, US
Joshua M. Hudman - Sammamish WA, US
Margaret K. Brown - Seattle WA, US
Christian Dean DeJong - Sammamish WA, US
Assignee:
Microvision, Inc. - Redmond WA
International Classification:
G03B 21/14
US Classification:
353 85, 353 50, 353121
Abstract:
A encoded image projection system () is configured to determine the proximity of the system to a projection surface (). The encoded image projection system () includes a light encoder () that scans a non-visible light beam () on the projection surface () selectively when scanning visible light to create an image. A detector () is then configured to receive reflections of the non-visible light beam () from the projection surface (). A control circuit () is configured to determine the distance () between the projection surface () and the system from, for example, intensity data or location data received from the detector (). Where the distances () are below a threshold, the control circuit () can either reduce the output power of the system or turn the system off.
Scanned Image Projection System Employing Beam Folding Apparatus
US Patent:
2012003, Feb 9, 2012
Filed:
Aug 5, 2010
Appl. No.:
12/851378
Inventors:
Robert A Sprowl - Sammamish WA, US
Margaret K. Brown - Seattle WA, US
Margaret K. Brown - Seattle WA, US
Assignee:
MICROVISION, INC. - Redmond WA
International Classification:
G09G 5/00, G02B 27/01, G03B 21/28
US Classification:
345156, 353 98, 359630
Abstract:
An imaging system () includes one or more light sources () configured to produce one or more light beams (). An additional light source () produces an additional light beam (), which may be a non-visible light beam like an infrared beam. A spatial light modulator () is configured to produce images () on a projection surface () by scanning the light beams and the additional light beam within an image cone () oriented in a first direction (). A partial reflector () is disposed within the image cone () and is configured to pass at least a portion of the light beams and reflect at least a portion of the additional light beam within a second cone () oriented in a second direction ().
Scanning Mirror Control
US Patent:
7952783, May 31, 2011
Filed:
Sep 22, 2008
Appl. No.:
12/235500
Inventors:
Steve Holmes - Sammamish WA, US
Clint Charles Rollins - Poulsbo WA, US
Margaret K. Brown - Seattle WA, US
Michael L. Schaaf - Bainbridge Island WA, US
Bruce C. Rothaar - Woodinville WA, US
Robert J. Jackson - Monroe WA, US
Lifford McLauchlan - Corpus Christi TX, US
Gregory Schneider - Occidental CA, US
Clint Charles Rollins - Poulsbo WA, US
Margaret K. Brown - Seattle WA, US
Michael L. Schaaf - Bainbridge Island WA, US
Bruce C. Rothaar - Woodinville WA, US
Robert J. Jackson - Monroe WA, US
Lifford McLauchlan - Corpus Christi TX, US
Gregory Schneider - Occidental CA, US
Assignee:
Microvision, Inc. - Redmond WA
International Classification:
G02B 26/08
US Classification:
3592241
Abstract:
A scanning beam projection system includes a scanning mirror having a fast-scan axis and a slow-scan axis. Movement on the slow-scan axis is controlled by a slow-scan scanning mirror control system. The control system receives position information describing angular displacement of the mirror. An outer loop of the control system operates in the frequency domain and determines harmonic drive coefficients for a scanning mirror drive signal. An inner loop of the control system operates in the time domain and compensates for a scanning mirror resonant vibration mode at a frequency within the frequency band occupied by the harmonic drive coefficients.
Phased Locked Resonant Scanning Display Projection
US Patent:
8248541, Aug 21, 2012
Filed:
Jul 2, 2009
Appl. No.:
12/496892
Inventors:
Margaret K. Brown - Seattle WA, US
Robert James Jackson - Monroe WA, US
Mark Champion - Kenmore WA, US
Robert James Jackson - Monroe WA, US
Mark Champion - Kenmore WA, US
Assignee:
Microvision, Inc. - Redmond WA
International Classification:
H04N 9/31
US Classification:
348744, 3592008, 4555561
Abstract:
A scanning projector includes a mirror that scans in two dimensions. The scanning mirror oscillates at a resonant frequency on a fast-scan axis, and is phase locked to an incoming frame rate on a slow-scan axis. An interpolation component interpolates pixel intensity data from adjacent pixels based on the position of the mirror when a pixel clock arrives. Incoming video data is stored in a buffer. Less than a complete frame of video data may be stored in the buffer.
Closed Loop Laser Control
US Patent:
8249120, Aug 21, 2012
Filed:
Mar 14, 2012
Appl. No.:
13/419734
Inventors:
Margaret K. Brown - Seattle WA, US
Joel D. Hopkins - Sammamish WA, US
Jenchao J. Lin - Bothell WA, US
Lifford McLauchlan - Corpus Christi TX, US
Joel D. Hopkins - Sammamish WA, US
Jenchao J. Lin - Bothell WA, US
Lifford McLauchlan - Corpus Christi TX, US
Assignee:
Microvision, Inc. - Redmond WA
International Classification:
H01S 3/13, H01S 3/00
US Classification:
372 3802, 372 29015, 372 3807
Abstract:
The radiance of a laser is a function of drive current. The radiance is also a function of other factors, such as age and temperature. A laser projection device adjusts laser drive parameters using a gradient descent operation. The device parameters may be adjusted iteratively and periodically. The period may be shorter or longer than a scan line in a video image.
Auto-Exposure Using Image Characterstics
US Patent:
2008000, Jan 3, 2008
Filed:
Jun 29, 2006
Appl. No.:
11/427519
Inventors:
Jianhua Xu - Mill Creek WA, US
Margaret K. Brown - Seattle WA, US
Christopher A. Wiklof - Everett WA, US
Margaret K. Brown - Seattle WA, US
Christopher A. Wiklof - Everett WA, US
International Classification:
G06K 9/00, G06K 9/40
US Classification:
382274, 382162, 382168
Abstract:
Aspects of the subject matter described herein relate to improving images obtained from an image-acquiring system (e.g., such as a scanned laser beam camera, a scanned laser imager, or other image-acquiring system). In certain aspects, an image frame is obtained from which a histogram is created. Characteristics of the image are determined based on the histogram. These characteristics are used to make an image quality judgment regarding the image. This judgment is then used to adjust parameters in the image-acquiring system for obtaining a subsequent frame. Parameters may be adjusted even if the image is judged as normal. Other aspects are described in the specification.
Scanning Laser Time Of Flight 3D Imaging
US Patent:
2013010, May 2, 2013
Filed:
Oct 27, 2011
Appl. No.:
13/282851
Inventors:
Bin Xue - Mukilteo WA, US
Robert James Jackson - Monroe WA, US
Joshua O. Miller - Woodinville WA, US
Steve Holmes - Sammamish WA, US
Margaret K. Brown - Seattle WA, US
Robert James Jackson - Monroe WA, US
Joshua O. Miller - Woodinville WA, US
Steve Holmes - Sammamish WA, US
Margaret K. Brown - Seattle WA, US
Assignee:
MICROVISION, INC. - Redmond WA
International Classification:
H04N 13/02, G01J 1/44, H01S 3/13
US Classification:
348 46, 250216, 250393, 250347, 348E13074
Abstract:
Laser light pulses are reflected off a scanning mirror. A time-of-flight distance measurement device receives reflected light pulses and determines distances. The light pulses have abrupt changes in amplitude. Reflected pulses are differentiated to reduce sensitivity to amplitude variations. Differentiated pulses may be compressed to keep the receiver from saturating. Distance measurements are combined with location information to produce a 3D image of a surface.
Laser Projection Temperature Compensation
US Patent:
7822086, Oct 26, 2010
Filed:
Jul 27, 2007
Appl. No.:
11/829459
Inventors:
Margaret K. Brown - Seattle WA, US
Randall B. Sprague - Carnation WA, US
Michael L. Schaaf - Bainbridge Island WA, US
Bin Xue - Mukilteo WA, US
Randall B. Sprague - Carnation WA, US
Michael L. Schaaf - Bainbridge Island WA, US
Bin Xue - Mukilteo WA, US
Assignee:
Microvision, Inc. - Redmond WA
International Classification:
H01S 3/00
US Classification:
372 3802, 372 3801, 372 3807, 372 2901, 372 29015, 372 2902, 372 34
Abstract:
The temperature of a laser diode changes in response to video content across a line of a displayed image, and the radiance changes as a function of temperature. An adaptive model estimates the temperature of the laser diode based on prior drive current values. For each displayed pixel, diode drive current is determined from the estimated diode temperature and a desired radiance value. A feedback circuit periodically measures the actual temperature and updates the adaptive model.