Patents by Inventor David Shi
David Shi 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: 7762466Abstract: An imaging-based bar code reader including: an imaging system for imaging a target bar code within a field of view of the imaging system and projecting light from the field of view onto a sensor array, the imaging system generating image frames of the field of view of the imaging system; the imaging systems including an imaging lens assembly having a plurality of lens and a selection drive mechanism to select between a first optical zoom position defining a first focal length and a first field of view for imaging a target bar code at a close range and a second optical zoom position defining a second focal length and a second field of view for imaging a target bar code at a far range, the second focal length being greater than the first focal length.Type: GrantFiled: December 18, 2008Date of Patent: July 27, 2010Assignee: Symbol Technologies, Inc.Inventors: Chinh Tan, Vladimir Gurevich, Rong Liu, Tsi David Shi, Igor Vinogradov, Ming Yu
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Publication number: 20100155485Abstract: An imaging-based bar code reader including: an imaging system for imaging a target bar code within a field of view of the imaging system and projecting light from the field of view onto a sensor array, the imaging system generating image frames of the field of view of the imaging system; the imaging systems including an imaging lens assembly having a plurality of lens and a selection drive mechanism to select between a first optical zoom position defining a first focal length and a first field of view for imaging a target bar code at a close range and a second optical zoom position defining a second focal length and a second field of view for imaging a target bar code at a far range, the second focal length being greater than the first focal length.Type: ApplicationFiled: December 18, 2008Publication date: June 24, 2010Applicant: Symbol Technologies, Inc.Inventors: Chinh Tan, Vladimir Gurevich, Rong Liu, Tsi David Shi, Igor Vinogradov, Ming Yu
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Patent number: 7726573Abstract: The disclosed bar code reader includes an auto-focusing component for rapidly producing in focus images. An imaging system makes use of an aiming pattern that impinges upon the coded indicia of a target. The imaging system includes a light monitoring pixel array and a focusing lens that is fixed with respect to the pixel array for transmitting an image of the target object onto the pixel array. The imaging system also includes a movable mirror mounted for movement along a path of travel to reflect light passing through the focusing lens onto the pixel array. A drive motor moves the mirror relative the lens to adjust a focus of an image of the object formed at the pixel array. An automatic focusing component of the imaging system analyzes the aiming pattern reflected from the target object and projected onto the pixel array by the lens.Type: GrantFiled: May 25, 2007Date of Patent: June 1, 2010Assignee: Symbol Technologies, Inc.Inventors: Vladimir Gurevich, Igor Vinogradov, Tsi David Shi, Duanfeng He
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Publication number: 20090159685Abstract: An exemplary barcode reader includes an imaging system that includes a light monitoring pixel array for converting light reflected from a target into electrical signals, and an optical system having one or more focusing lenses positioned with respect to the pixel array to transmit an image of a target object toward said pixel array. An illumination system comprising a light source for illuminating a the target within a field of view defined by the optical system. A filter is disposed adjacent the focusing lens and passing illumination with a wavelength less than about 700 nanometers to the pixel array and impedes the passage of light having a wavelength greater than this value.Type: ApplicationFiled: December 20, 2007Publication date: June 25, 2009Applicant: Symbol Technologies, Inc.Inventors: Tsi David Shi, Rong Liu, Ming Yu
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Publication number: 20090109534Abstract: A system having a light source generating a light beam, a collimating lens collimating the light beam into a collimated light beam and a pattern generating element comprising a diffractive optical element portion and a refractive optical element portion, the pattern generating element creating a target pattern from the collimated light beam incident on the pattern generating element.Type: ApplicationFiled: October 31, 2007Publication date: April 30, 2009Inventors: Vladimir Gurevich, David Shi, Chinh Tan, Heng Zhang
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Publication number: 20080290169Abstract: The disclosed bar code reader includes an auto-focusing component for rapidly producing in focus images. An imaging system makes use of an aiming pattern that impinges upon the coded indicia of a target. The imaging system includes a light monitoring pixel array and a focusing lens that is fixed with respect to the pixel array for transmitting an image of the target object onto the pixel array. The imaging system also includes a movable mirror mounted for movement along a path of travel to reflect light passing through the focusing lens onto the pixel array. A drive motor moves the mirror relative the lens to adjust a focus of an image of the object formed at the pixel array. An automatic focusing component of the imaging system analyzes the aiming pattern reflected from the target object and projected onto the pixel array by the lens.Type: ApplicationFiled: May 25, 2007Publication date: November 27, 2008Applicant: Symbol Technologies, Inc.Inventors: Vladimir Gurevich, Igor Vinogradov, Tsi David Shi, Duanfeng He
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Publication number: 20080167082Abstract: Described are an incorporated indicating arrangement for a mobile device and related methods. The mobile device comprises a housing and a processor situated in the housing. The mobile device further comprises a display arrangement disposed at least partially on a periphery of the housing. The display arrangement performs at least one of displaying first data to a user and receiving second data from the user. The display arrangement further provides an indication to the user, the indication being determined by the processor as a function of one of a functionality of the mobile device, a state of the functionality, preset configurations, and programmed configurations.Type: ApplicationFiled: March 16, 2007Publication date: July 10, 2008Inventors: Vladimir Gurevich, David Shi, Heng Zhang
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Patent number: 7325739Abstract: A portable electro-optical scanner for reading a target bar code having a plurality of bar code elements. The portable scanner includes: a housing supporting a scanning module and an optic system. The scanning module electro-optically scans the target bar code with a scanning beam and collects reflected light returning from the bar code. The scanning module includes a beam source emitting a scanning beam, beam directing apparatus causing the scanning beam to be repetitively scanned along a scanning plane intersecting the target bar code and photodetector circuitry receiving light from the target bar code. The optic system includes an exit window, a light collection lens and a reflective surface. The scanning beam passes through the exit window upon exiting the housing. The light collection lens receives reflected light from the target bar code and directing the reflected light toward a focal point. The focal point lying on the scanning plane of the scanning beam.Type: GrantFiled: May 27, 2005Date of Patent: February 5, 2008Assignee: Symbol Technologies, Inc.Inventors: Igor R. Vinogradov, Tsi David Shi
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Publication number: 20070057162Abstract: Heavy metals such as cadmium are not employed in optical bandpass filters employed in electro-optical readers to comply with governmental regulations concerning endangering the environment.Type: ApplicationFiled: September 13, 2005Publication date: March 15, 2007Inventors: Edward Barkan, David Shi, Vladimir Gurevich
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Publication number: 20070057069Abstract: A power pack with human interface devices that includes a power pack housing, which is detachably interfaced to a portable device. The power pack includes a power source internal to the housing for providing power, a light source internal to the housing for producing a light signal associated with a status, which light signal is viewable external to the housing, and an audio source internal to the housing for producing an audio signal associated with the status. The power pack interfaces electrically to the portable device to provide power thereto, and receive therefrom control signals associated with the status, which control signals activate at least one of the light source and audio source according to the status.Type: ApplicationFiled: November 6, 2006Publication date: March 15, 2007Applicant: SYMBOL TECHNOLOGIES, INC.Inventors: Jeff Terlizzi, Alex Breytman, Jorg Schlieffers, Kevin Cordes, Jean Tu, Jay White, Chin-Hung Jwo, David Shi
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Publication number: 20070034696Abstract: A system and method for reading an optical code is provided. The optical code reader system includes a dual aim/illumination assembly including a single light source generating: a) light having a first intensity for providing an aim pattern visible to a user for aiming the aim pattern at a target during an aim period of a scan cycle having at least an aim period and an exposure period; and b) light having a second intensity greater than the first intensity for providing illumination during the exposure period of the scan cycle. An imager module having an array of photo sensors senses incident light and generating image signals corresponding to the sensing during the exposure period.Type: ApplicationFiled: August 11, 2005Publication date: February 15, 2007Inventors: Edward Barkan, David Shi, Mehul Patel
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Publication number: 20060266840Abstract: A bar code reader indicator feature gives visible indication that a bar code function has been performed. The feature is integrally molded with the exit window to simplify the design and reduce cost. The feature can diffuse light from an existing indicator light within the reader or the scanning light beam can be directed to impinge upon an area of the exit window not normally in the beam path when the function has been performed to illuminate the feature.Type: ApplicationFiled: May 31, 2005Publication date: November 30, 2006Applicant: Symbol Technologies, Inc.Inventors: Igor Vinogradov, Vladimir Gurevich, David Shi
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Patent number: 7073715Abstract: An interface assembly is provided for interfacing an imaging engine having an adjustable lens assembly to a circuitry assembly of an optical code reader system, the interface assembly includes a first coupling circuitry assembly for transmission of at least one input signal in a first direction from the circuitry assembly toward the imaging engine, the at least one input signal including at least one focus control signal for controlling the lens assembly for selecting a focus position of at least two focus positions, and a second coupling circuitry assembly for transmission of at least one output signal in a second direction from the imaging engine toward the circuitry assembly, the at least one output signal including at least one pixel data signal, wherein the at least one pixel data signal is indicative of light sensed by a photo sensor array of the imaging engine. Preferably, the imaging engine is removably positioned and/or dimensioned and configured to fit within a predetermined form factor.Type: GrantFiled: June 12, 2003Date of Patent: July 11, 2006Assignee: Symbol Technologies, Inc.Inventors: Mehul Patel, Tsi David Shi, Thomas Bianculli, Joseph Giordano, Eduard Kogan, Heng Zhang, Nicholas Buongervino
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Publication number: 20060144944Abstract: The combination of a rooftop optical element and a soft edge aperture stop, as well as the introduction of a negative spherical aberration in a positive focusing lens, improve working distance and depth of focus in both moving beam and imaging readers for electro-optically reading indicia such as bar code symbols, especially for close-in symbols, and moreover tend to reduce undesirable light intensity modulation in the beam profile thereby improving reader performance.Type: ApplicationFiled: March 6, 2006Publication date: July 6, 2006Inventors: Igor Vinogradov, Vladimir Gurevich, David Shi, Dariusz Madej, Mehul Patel, Edward Barkan, Heng Zhang
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Patent number: 7025271Abstract: Several optical systems for imaging engines of imaging optical code readers are disclosed. Each optical system includes the abilities to change the depth of field of the imaging field and to adjust a focus quality of the imaging field. The disclosed structures for changing the depth of field of the disclosed optical systems allow for the automatic or manual selection of one of a plurality of depths of field.Type: GrantFiled: April 2, 2003Date of Patent: April 11, 2006Assignee: Symbol Technologies, Inc.Inventors: Paul Dvorkis, Alex Breytman, Mark Krichever, Brad Carlson, Tsi David Shi
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Publication number: 20060016892Abstract: The combination of a rooftop optical element and a soft edge aperture stop, as well as the introduction of a negative spherical aberration in a positive focusing lens, improve working distance and depth of focus in both moving beam and imaging readers for electro-optically reading indicia such as bar code symbols, especially for close-in symbols, and moreover tend to reduce undesirable light intensity modulation in the beam profile thereby improving reader performance.Type: ApplicationFiled: July 23, 2004Publication date: January 26, 2006Inventors: Igor Vinogradov, Vladimir Gurevich, David Shi, Dariusz Madej, Mehul Patel, Edward Barkan, Heng Zhang
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Publication number: 20050284942Abstract: Different aiming light patterns are generated to enable an imaging reader to be pointed directly at a target by employing non-interferometric optical components that are fabricated by molding and machining techniques.Type: ApplicationFiled: June 29, 2004Publication date: December 29, 2005Inventors: Vladimir Gurevich, Alexander Breytman, David Shi
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Publication number: 20050199725Abstract: Working range is increased in an electro-optical reader or an imager for reading indicia by applying a voltage to a variable lens to change the shape of a liquid therein.Type: ApplicationFiled: March 11, 2004Publication date: September 15, 2005Inventors: Pierre Craen, David Shi, Vladimir Gurevich, Edward Barkan, Igor Vinogradov
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Patent number: 6918538Abstract: An image scanning device is provided which includes a system for determining the distance to a target to be scanned. The image scanning device includes an optical system and an image sensor array for focusing a light beam and imaging the target. The device preferably includes an automatic focusing system for adjusting the position of the optical system in order to adjust the focal point, and thereby focus the image of the target onto the image sensor array. In one embodiment of the image scanning device, the distance is determined by analyzing a collimated aiming pattern formed by collimating the light beam. In another embodiment, the distance is determined by analyzing a speckle pattern caused by the speckle effect upon the light beam hitting the target.Type: GrantFiled: April 29, 2003Date of Patent: July 19, 2005Assignee: Symbol Technologies, Inc.Inventors: Alex Breytman, Mark Krichever, Brad Carlson, Tsi David Shi, Dmitriy Yavid
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Publication number: 20050023352Abstract: An imaging and an illuminating engine is provided for an optical code reader to image and illuminate remote target indicia. The engine includes an image sensor for receiving reflected illumination from the remote indicia and at least two illumination assemblies for providing illumination of the remote indicia. Each illumination assembly is capable of providing a number of different outputs, such as light having different wavelengths or different output durations. A transmissive, optical element overlays the engine for preventing light generated by the at least two illumination assemblies from reflecting back towards the image sensor. The imaging engine is an integrated circuit package for easily inserted and interfacing within an optical code reader as a plug-and-play component.Type: ApplicationFiled: August 29, 2003Publication date: February 3, 2005Inventors: Mehul Patel, David Shi, Thomas Bianculli, Chunyu Zhao