中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

66 records (took 0.02 seconds)

    System and method for encrypted communications between electronic devices
    12.
    发明专利
    System and method for encrypted communications between electronic devices 未知

    公开(公告)号：AU2003276885A8

    公开(公告)日：2004-04-30

    申请号：AU2003276885

    申请日：2003-09-12

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： HE DUANFENG

    IPC: H04L9/00 ,  H04L9/30 ,  H04K1/00

    Abstract: Described is a system and method for encrypted communications. The system may include first and second transponders. The first transponder has a first memory arrangement that stores a first key. The second transponder includes a second memory arrangement and has an access to a second key. The first transponder generates a first message for delivery to the second transponder, and encrypts the first message using a randomization key to generate a second message. Then, the first transponder encrypts (a) the second message and (b) one of the a randomization key corresponding index using the first key to generate a third message. The second key may decrypt the third message.

    Optical code symbol reader
    13.
    发明专利
    Optical code symbol reader 未知

    公开(公告)号：GB2382446A

    公开(公告)日：2003-05-28

    申请号：GB0224775

    申请日：2002-10-24

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： CARLSON BRADLEY ,  HE DUANFENG ,  KATZ JOSEPH

    IPC: H01L27/14 ,  G06K7/10 ,  H01L27/146 ,  H01L31/0352 ,  H01L33/00

    Abstract: A device for imaging optical code symbols comprises no more than 1024 pixels, wherein each of the pixels has an aspect ratio that is greater than 2 to 1 with a short dimension not greater than 4 žm and not less than 2 žm, wherein preferably the pixels are arranged in a single row. Also provided is a bar code reader including a sensor for imaging a field of view of the reader comprising a single semiconductor device as described above. Apparatus and techniques are provided which reduce and/or eliminate the need for illumination of a target by the imager, thereby reducing the overall power consumed by the imager and/or its overall size. An imager with an increased working range is provided, as is a light emitting diode which produces a light with reduced line thickness.

    Detectiing window deterioration on barcode scanning workstation
    15.
    发明专利
    Detectiing window deterioration on barcode scanning workstation 未知

    公开(公告)号：AU2015298237A1

    公开(公告)日：2017-01-05

    申请号：AU2015298237

    申请日：2015-07-16

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： JOSEPH EUGENE B ,  HE DUANFENG

    IPC: G06K7/10

    Abstract: A method of operating a workstation includes capturing multiple monitoring images each being captured with the imaging sensor while the illumination light source is energized during one of multiple short exposure-time-periods, and detecting a checkup-condition that includes analyzing the multiple monitoring images to determine the presence of any adverse feature on workstation's window. Each of the multiple short exposure-time-periods is shorter than four times of a threshold exposure-time-period but no shorter than 25% of the threshold exposure-time-period. The threshold exposure-time-period is a minimal exposure-time-period needed for the imaging sensor to capture recognizable patterns of a barcode that is in directing contacting with the window while the illumination light source is energized.

    18.
    发明专利
    未知

    公开(公告)号：DE69523376D1

    公开(公告)日：2001-11-29

    申请号：DE69523376

    申请日：1995-06-30

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： JOSEPH EUGENE ,  LI YAJUN ,  HE DUANFENG ,  KATZ JOSEPH ,  SWARTZ JEROME

    IPC: G06K7/10

    Abstract: A plurality of the areas of differing light reflectivity of a bar code symbol (34) or the like are simultaneously illuminated using, for example, a beam of laser light (22) that has an elongate cross-section. The light beam (22) is swept over the symbol to be read in a direction transverse to the elongated dimension of the illuminated region (78) so that a two-dimensional area (42) of the symbol is illuminated over time. The reflected light is sensed by a 1D CCD array (50). A microprocessor (52) within the scanner provides visual feedback to aid a user in aligning the device, and also provides for a selectable aspect ratio for the image, a selectable image resolution and size, a selectable aspect ratio of the illumination, and a selectable pixel size. All of these options may be programmed within the microprocessor (52), enabling the device to read a large variety of two-dimensional symbols.

    Imaging barcode scanner for enhanced document capture
    19.
    发明专利
    Imaging barcode scanner for enhanced document capture 未知

    公开(公告)号：AU2015378543A1

    公开(公告)日：2017-07-13

    申请号：AU2015378543

    申请日：2015-12-15

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： TRAJKOVIC MIROSLAV ,  CARLSON BRADLEY S ,  HE DUANFENG

    IPC: G06K7/10

    Abstract: An imaging barcode scanner and method are provided. The scanner includes a first array of photosensitive elements having a first field of view traversing a window and intersecting a work surface at a first angle, and a second array of photosensitive elements having a second field of view traversing the window and intersecting the work surface at a second angle. The scanner also includes a processor configured to: receive a first image of the work surface from the first array of photosensitive elements, and a second image of the work surface from the second array of photosensitive elements; register the first image with the second image; and generate an enhanced image of the work surface based on the registered first image and second image, the enhanced image having a greater pixel density than the first image and the second image.

    IMAGING DEVICE HAVING LIGHT FIELD IMAGE SENSOR
    20.
    发明专利
    IMAGING DEVICE HAVING LIGHT FIELD IMAGE SENSOR 未知

    公开(公告)号：CA2859783C

    公开(公告)日：2016-11-08

    申请号：CA2859783

    申请日：2012-12-14

    Applicant: SYMBOL TECHNOLOGIES INC

    Inventor： HE DUANFENG ,  GUREVICH VLADIMIR ,  GOREN DAVID P ,  FAN NONG-QIANG

    IPC: G06K7/10

    Abstract: A method of imaging a target object with an imaging reader. The method includes the following: (1) detecting light from the target object through a lens arrangement with an image sensor to generate light-field data; (2) generating a stream of image data including image data representing an expected in focus image of the target object, and (3) processing the expected in focus image of the target object to decode a barcode on the target object. The image sensor includes an array of photosensitive elements and an array of microlenses that overlays the array of photosensitive elements located at a focus plane of the microlens.

Patent Agency Ranking