Patents by Inventor Joseph Cai

Joseph Cai 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).

  • Patent number: 10341992
    Abstract: A method and apparatus for transmitting using beam are disclosed. A wireless transmit/receive unit (WTRU) may transmit a first physical random access channel (PRACH) preamble to a base station using a first beam at a first power level. The WTRU may receive an indication that the first PRACH preamble was received by the base station. If the indication was received, the WTRU may transmit data. If the indication was not received, the WTRU may select the first beam or a second beam to use for a second PRACH preamble. Further, the first and second beams may be different beams. If the first beam is selected, the WTRU may increase a transmission power level of the second PRACH preamble by a first power ramp step. If the second beam is selected, the WTRU may not increase the transmission power level of the second PRACH preamble by the first power ramp step.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: July 2, 2019
    Assignee: InterDigital Patent Holdings, Inc.
    Inventors: Benoit Pelletier, Lujing Cai, Hong O. Zhang, Fengjun Xi, Joseph S. Levy
  • Publication number: 20190195797
    Abstract: Light detection devices and related methods are provided. The devices may comprise a reaction structure for containing a reaction solution with a relatively high or low pH and a plurality of reaction sites that generate light emissions. The devices may comprise a device base comprising a plurality of light sensors, device circuitry coupled to the light sensors, and a plurality of light guides that block excitation light but permit the light emissions to pass to a light sensor. The device base may also include a shield layer extending about each light guide between each light guide and the device circuitry, and a protection layer that is chemically inert with respect to the reaction solution extending about each light guide between each light guide and the shield layer. The protection layer prevents reaction solution that passes through the reaction structure and the light guide from interacting with the device circuitry.
    Type: Application
    Filed: December 11, 2018
    Publication date: June 27, 2019
    Applicant: Illumina, Inc.
    Inventors: Xiuyu CAI, Joseph Francis PINTO, Thomas A. BAKER, Tracy Helen FUNG
  • Patent number: 10328820
    Abstract: A fuel cell system for a vehicle or other system includes a fuel cell stack, a DC-DC boost converter, and a controller. The stack has a plurality of fuel cells and a stack voltage. The controller regulates the stack voltage during start-up of the fuel cell stack via the boost converter, and is programmed with a plurality of calibrated voltage profiles each having a corresponding magnitude and rate of change. The controller is configured to execute a method which includes detecting an air start of the fuel cell stack in response to a requested start-up of the fuel cell stack. The controller then enforces the stack voltage to the predetermined voltage profiles during an actual start-up of the fuel cell stack, doing so via regulation of the boost converter and using the plurality of calibrated voltage profiles.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: June 25, 2019
    Assignee: GM Global Technology Operations LLC.
    Inventors: Jun Cai, Joseph Castelluccio, Sergio E. Garcia, Andrew J. Maslyn
  • Patent number: 10325128
    Abstract: Systems, methods, and computer-readable media are disclosed for long range barcode scanning. In one embodiment, an example method may include determining a signal representative of a portion of light reflected from a barcode, determining respective values at one or more valleys and peaks of the signal, determining that a first peak represents a first narrow barcode element of the barcode, and determining that the third peak represents a second narrow barcode element of the barcode. Example methods may include determining a first edge position of the first narrow barcode element along a first portion of the signal, determining a second edge position of the second narrow barcode element along a second portion of the signal, and determining a path between the first edge position to the second edge position.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: June 18, 2019
    Assignee: Amazon Technologies, Inc.
    Inventor: Joseph Cai
  • Patent number: 8960550
    Abstract: An arrangement for, and a method of, minimizing misdecodes of GS1 DataBar Limited (Databar-limited) symbols in a reader for electro-optically reading symbols of different symbologies, such as Universal Product Code (UPC) Version A (UPC-A) symbols, includes a data capture assembly for capturing light from a target symbol, and for generating an electrical signal indicative of the captured light; and a controller for processing and decoding the electrical signal, and for determining whether the decoded signal is indicative of a Databar-limited symbol, and for determining whether the decoded signal has characteristics indicative of a different symbology, such as the UPC-A symbol, to indicate whether a misdecode of the Databar-limited symbol has occurred.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: February 24, 2015
    Assignee: Symbol Technologies, Inc.
    Inventors: Dariusz J. Madej, Joseph Cai, Duanfeng He, Miroslav Trajkovic, Dayou Wang, Michelle Wang
  • Patent number: 8915442
    Abstract: An arrangement for, and a method of, enhancing performance of an imaging reader for imaging symbols to be read, include a solid-state imager supported by the reader and having an array of image sensors for capturing return light from a symbol as pixel data over a field of view, and a controller operatively connected to the imager, for mapping a virtual scan line in the field of view, for determining whether the virtual scan line extends entirely over the symbol, for remapping the virtual scan line as a remapped virtual scan line that extends entirely over the symbol upon determining that the virtual scan line extends partially over the symbol, and for decoding the pixel data that lies on the remapped virtual scan line.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: December 23, 2014
    Assignee: Symbol Technologies, Inc.
    Inventors: Joseph Cai, Duanfeng He, Dayou Wang, Michelle Wang
  • Patent number: 8657195
    Abstract: A method includes (1) obtaining a captured image of a document physically placed on a background having specifically designed patterns; (2) storing into a memory the captured image that includes an image of the document and an image of the background surrounding the document; and (3) analyzing the captured image to search for a boundary of the document in the captured image, where step of analyzing includes distinguishing the image of the background from the image of the document.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: February 25, 2014
    Assignee: Symbol Technologies, Inc.
    Inventors: Dayou Wang, Joseph Cai, Michelle X. Wang
  • Publication number: 20130075473
    Abstract: A method includes (1) obtaining a captured image of a document physically placed on a background having specifically designed patterns; (2) storing into a memory the captured image that includes an image of the document and an image of the background surrounding the document; and (3) analyzing the captured image to search for a boundary of the document in the captured image, where step of analyzing includes distinguishing the image of the background from the image of the document.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 28, 2013
    Applicant: Symbol Technologies, Inc.
    Inventors: Dayou Wang, Joseph Cai, Michelle X. Wang
  • Patent number: 8162224
    Abstract: A method and apparatus for setting the amount of exposure for the photodetector array in a barcode scanner. An image is captured with the photodetector array. The type for each sub-region in the multiple sub-regions in the image captured is determined. Each sub-region in the multiple sub-regions is assigned a weight based on the type of the sub-region. The amount of exposure for the photodetector array in the barcode scanner is set automatically based on the weight for each sub-region in the multiple sub-regions. In some embodiments, the predetermined image area are repartitioned into new multiple sub-regions based on the image captured, and the amount of exposure for the photodetector array in the barcode scanner is set automatically based on the weight for each sub-region in the new multiple sub-regions.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: April 24, 2012
    Assignee: Symbol Technologies, Inc.
    Inventors: Dayou Wang, Joseph Cai, Michelle Wang
  • Publication number: 20110024505
    Abstract: A method and apparatus for setting the amount of exposure for the photodetector array in a barcode scanner. An image is captured with the photodetector array. The type for each sub-region in the multiple sub-regions in the image captured is determined. Each sub-region in the multiple sub-regions is assigned a weight based on the type of the sub-region. The amount of exposure for the photodetector array in the barcode scanner is set automatically based on the weight for each sub-region in the multiple sub-regions. In some embodiments, the predetermined image area are repartitioned into new multiple sub-regions based on the image captured, and the amount of exposure for the photodetector array in the barcode scanner is set automatically based on the weight for each sub-region in the new multiple sub-regions.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 3, 2011
    Applicant: SYMBOL TECHNOLOGIES, INC.
    Inventors: Dayou WANG, Joseph Cai, Michelle Wang
  • Publication number: 20100187314
    Abstract: An arrangement for, and a method of, enhancing performance of an imaging reader for imaging symbols to be read, include a solid-state imager supported by the reader and having an array of image sensors for capturing return light from a symbol as pixel data over a field of view, and a controller operatively connected to the imager, for mapping a virtual scan line in the field of view, for determining whether the virtual scan line extends entirely over the symbol, for remapping the virtual scan line as a remapped virtual scan line that extends entirely over the symbol upon determining that the virtual scan line extends partially over the symbol, and for decoding the pixel data that lies on the remapped virtual scan line.
    Type: Application
    Filed: January 29, 2009
    Publication date: July 29, 2010
    Inventors: Joseph Cai, Duanfeng He, Dayou Wang, Michelle Wang
  • Publication number: 20100163625
    Abstract: An arrangement for, and a method of, minimizing misdecodes of GS1 DataBar Limited (Databar-limited) symbols in a reader for electro-optically reading symbols of different symbologies, such as Universal Product Code (UPC) Version A (UPC-A) symbols, includes a data capture assembly for capturing light from a target symbol, and for generating an electrical signal indicative of the captured light; and a controller for processing and decoding the electrical signal, and for determining whether the decoded signal is indicative of a Databar-limited symbol, and for determining whether the decoded signal has characteristics indicative of a different symbology, such as the UPC-A symbol, to indicate whether a misdecode of the Databar-limited symbol has occurred.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 1, 2010
    Inventors: Dariusz J. Madej, Joseph Cai, Duanfeng He, Miroslav Trajkovic, Dayou Wang, Michelle Wang
  • Patent number: 7487916
    Abstract: An imaging and decoding system for an imaging-based bar code reader. The imaging and decoding system includes an imaging system and a decoding system. The imaging system includes an imaging pixel array and a memory which function to: image the target bar code by scanning the target bar code at an acute angle with respect to a vertical axis of the target bar code to generate a tilted imaged bar code stored in memory, the tilted imaged bar code comprising an array of gray scale values stored in the memory; generate a virtual scan line traversing a horizontal width of the tilted imaged bar code; establish a zone about the virtual scan line; and project gray values within the zone onto the virtual scan line thereby generating a sequence of gray scale values associated with the virtual scan line, the sequence of gray scale values representative of a pattern of elements of the target bar code. The decoding system decodes the target bar code utilizing the sequence of values associated with the virtual scan line.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: February 10, 2009
    Assignee: Symbol Technologies, Inc.
    Inventors: Joseph Cai, Xiaomei Wang
  • Patent number: 7422153
    Abstract: Partial decode results that successfully decode a subset of bar code symbol components and a quality indicator associated with each component are stored. These partial decode results are combined based on the quality indicator to achieve an improved decode of the symbol.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: September 9, 2008
    Assignee: Symbol Technologies, Inc.
    Inventor: Joseph Cai
  • Patent number: 7395970
    Abstract: A bar code scanning system and method for reading and processing bar code symbology uses a scanning station installed above the check-out stand and a receiving station at some distance away from the scanning station. The scanning station projects light onto a surface of the check-out stand. The projected light can have a well defined border indicating where a user should place items to be scanned. Alternatively, a pattern coincident with the projected light can be projected onto the surface and which includes a target indicating where items should be placed for scanning. Light reflected by items in the target region is processed to decode optical symbology on the item and produce a signal that is representative of said sensed symbology. Information about the scanned item can be processed and displayed by the receiving station for use in, e.g., a point-of-sale transaction.
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: July 8, 2008
    Assignee: Symbol Technologies, Inc.
    Inventors: Paul Poloniewicz, Mehul Patel, Sundeep Kumar, Joseph Cai, Duanfeng He
  • Publication number: 20080093457
    Abstract: An aiming assembly supported by a mobile imaging reader projects a visual prompt, preferably one or more arrows, on a symbol to indicate a direction in which a field of view of an imager in the housing is to be moved in order to position the symbol entirely within the field of view prior to electro-optically reading the symbol.
    Type: Application
    Filed: October 19, 2006
    Publication date: April 24, 2008
    Inventors: Dayou Wang, Joseph Cai
  • Publication number: 20070119944
    Abstract: Partial decode results that successfully decode a subset of bar code symbol components and a quality indicator associated with each component are stored. These partial decode results are combined based on the quality indicator to achieve an improved decode of the symbol.
    Type: Application
    Filed: November 30, 2005
    Publication date: May 31, 2007
    Applicant: Symbol Technologies, Inc.
    Inventor: Joseph Cai
  • Publication number: 20070057066
    Abstract: An imaging and decoding system for an imaging-based bar code reader. The imaging and decoding system includes an imaging system and a decoding system. The imaging system includes an imaging pixel array and a memory which function to: image the target bar code by scanning the target bar code at an acute angle with respect to a vertical axis of the target bar code to generate a tilted imaged bar code stored in memory, the tilted imaged bar code comprising an array of gray scale values stored in the memory; generate a virtual scan line traversing a horizontal width of the tilted imaged bar code; establish a zone about the virtual scan line; and project gray values within the zone onto the virtual scan line thereby generating a sequence of gray scale values associated with the virtual scan line, the sequence of gray scale values representative of a pattern of elements of the target bar code. The decoding system decodes the target bar code utilizing the sequence of values associated with the virtual scan line.
    Type: Application
    Filed: September 15, 2005
    Publication date: March 15, 2007
    Applicant: Symbol Technologies, Inc.
    Inventors: Joseph Cai, Xiaomei Wang
  • Publication number: 20050098633
    Abstract: A bar code scanning system and method for reading and processing bar code symbology uses a scanning station installed above the check-out stand and a receiving station at some distance away from the scanning station. The scanning station projects light onto a surface of the check-out stand. The projected light can have a well defined border indicating where a user should place items to be scanned. Alternatively, a pattern coincident with the projected light can be projected onto the surface and which includes a target indicating where items should be placed for scanning. Light reflected by items in the target region is processed to decode optical symbology on the item and produce a signal that is representative of said sensed symbology. Information about the scanned item can be processed and displayed by the receiving station for use in, e.g., a point-of-sale transaction.
    Type: Application
    Filed: May 3, 2004
    Publication date: May 12, 2005
    Inventors: Paul Poloniewicz, Mehul Patel, Sundeep Kumar, Joseph Cai, Duanfeng He
  • Patent number: 6405925
    Abstract: Optical image readers have a two-dimensional image sensor and an auto-discrimination function. The auto-discrimination function identifies optical codes by type for pixel clusters and, in some cases, tilt angle and start/stop coordinates. The clustered pixel data is passed to an appropriate decoder identified by the auto-discrimination function based upon a likelihood that the cluster contains an optical code of a particular type. Line drawing technique provide for adequate sampling of the clustered pixel data code based on the tilt angle of the code relative to an image sensor array.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: June 18, 2002
    Assignee: Symbol Technologies, Inc.
    Inventors: Duanfeng He, Eugene Joseph, Joseph Cai