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David A Lehoty

from Mountain View, CA
Age ~62
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Also known as:
David Allen Lehoty, Dave Allen Lehoty, Dave A Lehoty
Phone and address:
1788 Fordham Way, Mountain View, CA 94040
(650) 938-3304
Related to:
Jacqueline S Desrochers, 32Barbara M Carroll, 67Suzanne L Stansbury, 61Asuka K Lehoty, 51Karla J Lehoty, 62Daniel A Lehoty, 66Francis A Lehoty, 89Dorothy A Lehoty, 85
Connected to:
Rebecca E Lehotzky, 43George R Lehouillier, 74Kimberly A Lehouiller, 56Carol A Lehoullier, 68Craig S Lehoullier, 69John E Lehoullier, 63Isabelle E Lehoux, 53Nathalie K Lehoux, 51Brenda S Lehr, 74Carrie Lehr, 62

David Lehoty Phones & Addresses

  • 1788 Fordham Way, Mountain View, CA 94040 (650) 938-3304
  • Palo Alto, CA
  • Cleveland, OH
  • Menlo Park, CA
  • 1788 Fordham Way, Mountain View, CA 94040 (415) 573-8115

Work

Company: Ploughman analytics, inc. Sep 2017 Position: Consulting image processing software developer

Education

Degree: Master of Science, Masters School / High School: Stanford University Specialities: Electrical Engineering

Skills

Gui • Development • Engineering • Software

Industries

Computer Software

Resumes

Resumes

David Lehoty Photo 1

Consulting Image Processing Software Developer

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Location:
Tracy, CA
Industry:
Computer Software
Work:
Ploughman Analytics, Inc.
Consulting Image Processing Software Developer
Sober-Eye
Consulting Software Developer and Color Scientist
Glo-Usa Apr 2015 - Sep 2015
Consulting System Engineer and Color Scientist at Glo-Usa
Motius Gmbh Oct 2013 - Sep 2015
Engineering Director
Cypress Semiconductor Corporation Mar 2011 - Nov 2012
Senior Member Technical Staff
Education:
Stanford University
Master of Science, Masters, Electrical Engineering Case Western Reserve University
Bachelors, Bachelor of Science, Electrical Engineering
Skills:
Gui
Development
Engineering
Software

Publications

Us Patents

Bipolar Operation Of Light-Modulating Array

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US Patent:
6804038, Oct 12, 2004
Filed:
Jun 26, 2002
Appl. No.:
10/183579
Inventors:
David A. LeHoty - Mountain View CA
Bryan Staker - Pleasanton CA
Assignee:
Silicon Light Machines, Inc. - Sunnyvale CA
International Classification:
G02B 2600
US Classification:
359290, 359291, 359292, 359212
Abstract:
One embodiment disclosed comprises a method for bipolar operation of a light-modulating array. The method includes driving light-modulating elements of the array in a first polarity, switching polarities from the first polarity to a second polarity, driving the light-modulating elements of the array in a second polarity, switching polarities from the second polarity to the first polarity, and repeating the steps. Another embodiment disclosed comprises an apparatus utilizing a light-modulating array. The apparatus includes a first look-up table storing data for operating elements the light-modulating array in a first polarity mode, and a second look-up table storing data for operating the elements of the light-modulating array in a second polarity mode. The apparatus also includes a drive system for driving the elements of the light-modulating array. The drive system is coupled to both the first and second look-up tables.

Method And Apparatus For Calibration Of Light-Modulating Array

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US Patent:
6898377, May 24, 2005
Filed:
Jun 26, 2002
Appl. No.:
10/183254
Inventors:
David A. LeHoty - Mountain View CA, US
Bryan Staker - Pleasanton CA, US
Assignee:
Silicon Light Machines Corporation - Sunnyvale CA
International Classification:
H04J014/02
H04J014/08
US Classification:
398 87, 398 86, 398101
Abstract:
One embodiment disclosed relates to a method for calibrating an array of light-modulating elements. The method includes illuminating the array of elements, modulating an intensity of light diffracted by the elements over a modulation range, and measuring the modulated light intensity from each element of the array using a linear detector. Other embodiments disclosed relate to an apparatus and system for calibrating an array of light-modulating elements. The apparatus includes a light source for illuminating the array of elements and a linear detector for measuring light intensities at points along a line segment. The apparatus is configured so that modulated light from each of the elements impinges upon a different point of the line segment. The system includes means for modulating an intensity of light diffracted by the elements over a modulation range and a detector for measuring the modulated light intensity from each element of the array.

Method And Apparatus For Monitoring Wdm Channels And For Analyzing Dispersed Spectrum Of Light

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US Patent:
6967718, Nov 22, 2005
Filed:
Feb 28, 2003
Appl. No.:
10/377977
Inventors:
Clinton B. Carlisle - Palo Alto CA, US
Jahja I. Trisnadi - Cupertino CA, US
Douglas A. Webb - Los Altos CA, US
David Lehoty - Mountain View CA, US
Kais Almarzouk - Tustin CA, US
Akira Tomita - Redwood City CA, US
Assignee:
Silicon Light Machines Corportion - Sunnyvale CA
International Classification:
G01J003/28
US Classification:
356328
Abstract:
An apparatus for measuring wavelength composition and power of a dispersed spectrum of light comprises a diffractive light modulator and a detector. The diffractive light modulator comprises an array of light modulating pixels operable in a first mode and a second mode. In operation, the dispersed spectrum of light illuminates the diffractive light modulator along the array of light modulating pixels, which selectively directs a subset of the dispersed spectrum of light into the first mode while directing a remainder of the dispersed spectrum of light into the second mode. The detector is optically coupled to the diffractive light modulator. In operation, the detector detects the subset of the dispersed spectrum of light while not detecting the remainder of the dispersed spectrum of light. Each of the light modulating pixels is controlled by signals sent from a controller. The signals comprise a time division multiplex modulation, a code division multiplex modulation, or a combination thereof.

Triangular Bidirectional Scan Method For Projection Display

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US Patent:
7053930, May 30, 2006
Filed:
Jun 27, 2002
Appl. No.:
10/186212
Inventors:
Douglas A. Webb - Los Altos CA, US
David T. Amm - Sunnyvale CA, US
Paul A. Alioshin - San Francisco CA, US
David A. LeHoty - Mountain View CA, US
Mark A. Koenig - Santa Clara CA, US
Assignee:
Silicon Light Machines Corporation - Sunnyvale CA
International Classification:
H04N 5/74
US Classification:
348203
Abstract:
One embodiment disclosed relates to a method for bi-directional progressive scanning in a display system. The method includes receiving image data for an image to be displayed, forward scanning the image data in a first direction using a linear array of controllable light elements, and reverse scanning the image data in a second direction opposite to the first direction using the linear array. Another embodiment disclosed relates to an apparatus for bi-directional progressive scanning. The apparatus includes a linear array of controllable light elements, and a scanner driver that drives a scanner apparatus using a drive signal that is applied to drive both forward and reverse optical scanning of an image by the linear array.

Optical Positioning Device Using Telecentric Imaging

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US Patent:
8345003, Jan 1, 2013
Filed:
Jul 26, 2010
Appl. No.:
12/843864
Inventors:
Jahja Trisnadi - San Jose CA, US
Clinton Carlisle - San Jose CA, US
Charles Roxlo - San Jose CA, US
David A. Lehoty - San Jose CA, US
Assignee:
Cypress Semiconductor Corporation - San Jose
International Classification:
G09G 5/08
US Classification:
345157, 345158, 345160, 345164, 345166
Abstract:
One embodiment relates to an optical displacement sensor for sensing movement of a data input device across a surface by determining displacement of optical features in a succession of frames. The sensor includes at least an illuminator, telecentric imaging optics on the object (scattering surface) side, and an array of photosensitive elements. The illuminator is configured to illuminate a portion of the surface. The telecentric imaging optics is configured to image the optical features emanating from the illuminated portion of the surface, and the array of photosensitive elements is configured to detect intensity data relating to the optical features imaged by the telecentric imaging optics. Other embodiments are also disclosed.

Optical Position Sensing Device Including Interlaced Groups Of Photosensitive Elements

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US Patent:
7268341, Sep 11, 2007
Filed:
May 4, 2005
Appl. No.:
11/123326
Inventors:
David A. Lehoty - Mountain View CA, US
Charles B. Roxlo - Saratoga CA, US
Jahja I. Trisnadi - Cupertino CA, US
Clinton B. Carlisle - Palo Alto CA, US
Assignee:
Silicon Light Machines Corporation - San Jose CA
International Classification:
G09G 5/08
US Classification:
250221, 2502221, 345166
Abstract:
One embodiment described relates to an optical displacement sensor for sensing movement of a data input device across a surface by detecting displacement of optical features in a succession of images of the surface. The sensor includes a detector having an array including a number (N) of sets of photosensitive elements, each set having a number (M) of photosensitive elements, where M is greater than two and not equal to four. Signals from each of the photosensitive elements in a set are electrically coupled or combined with corresponding photosensitive elements in other sets to produce a total of M independent group signals from M interlaced groups of photosensitive elements. Other embodiments are also described.

Method And Apparatus For Driving Light-Modulating Elements

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US Patent:
20040120025, Jun 24, 2004
Filed:
Dec 20, 2002
Appl. No.:
10/325105
Inventors:
David LeHoty - Mountain View CA, US
International Classification:
G02B026/00
US Classification:
359/290000, 359/291000
Abstract:
One embodiment disclosed relates to a system for modulating a plurality of micro-electromechanical (MEM) devices. The system includes a means for providing an amplitude modulation signal to each MEM device at a base frequency and a means for providing a width modulation signal at the base frequency. In addition, the system includes a clock means for providing a higher-frequency clock signal with a frequency that is a multiple of the base frequency. In this embodiment, the width modulation signal for each MEM device indicates at least one position on the higher-frequency clock signal.

Optical Positioning Device Resistant To Speckle Fading

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US Patent:
20050258346, Nov 24, 2005
Filed:
May 5, 2005
Appl. No.:
11/123527
Inventors:
David LeHoty - Mountain View CA, US
Charles Roxlo - Saratoga CA, US
Jahja Trisnadi - Cupertino CA, US
Clinton Carlisle - Palo Alto CA, US
International Classification:
H01J040/14
US Classification:
250221000
Abstract:
One embodiment disclosed pertains to an optical positioning apparatus configured to be resistant to speckle fading. The apparatus includes at least a coherent light source and a detector. The coherent light source is configured to illuminate a surface with laser light. The detector is configured to obtain a succession of data frames of the illuminated surface, and the detector comprises N rows each including a plurality of photosensitive elements. Another embodiment disclosed pertains to an optical positioning apparatus configured to be resistant to speckle fading using calculating and filtering circuitry. The calculating circuitry is configured to calculate velocity data from the intensity data. The filtering circuitry is configured to reduce effects from speckle fading in the velocity data. Other embodiments are also described.
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David A Lehoty from Mountain View, CA, age ~62 Get Report