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Hand-supportable digital image capturing and processing system employing an area-type image sensing array exposed to illumination from an led-based illumination array only when all sensor elements in said image-sensing array are activated and in a state of integration

  • US 20070138291A1
  • Filed: 11/21/2006
  • Published: 06/21/2007
  • Est. Priority Date: 11/13/2003
  • Status: Active Grant
First Claim
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1. A hand-supportable digital image capture and processing system comprising:

  • A hand-supportable housing;

    an image formation and detection subsystem, disposed in said hand-supportable housing, and having image formation optics for producing a field of view (FOV) upon an object to be imaged and an area-type image sensing array for detecting imaged light reflected off the object during illumination operations in an image capture mode in which a plurality of rows of sensor elements in the area-type image sensing array are enabled so as to detect a 2D digital image of the object on said area-type image sensing array;

    an LED-based illumination subsystem, disposed in said hand-supportable housing, and having an LED-based illumination array for producing a field of LED-based illumination within the FOV of the image formation and detection subsystem during the image capture mode;

    an automatic illumination control subsystem disposed in said hand-supportable housing, for automatically controlling the operation of said LED-based illumination subsystem;

    an image capturing and buffering subsystem disposed in said hand-supportable housing, for capturing and buffering 2-D digital images detected by said image formation and detection subsystem;

    an image-processing subsystem disposed in said hand-supportable housing, for processing digital images captured and buffered by said image capturing and buffering subsystem and producing processed image data; and

    an input/output subsystem disposed in said hand-supportable housing, for outputting processed image data and the like to an external host system or other information receiving or responding device;

    a system control subsystem disposed in said hand-supportable housing, for activating and controlling said subsystem components described above;

    wherein when said area-type image sensing array is activated by said system control subsystem and said plurality of rows of sensor elements in said area-type image sensing array are in a state of integration, then said automatic illumination control subsystem automatically drives said LED-based illumination array so that said area-type image sensing array is exposed with LED-based illumination, and thereby enabling said area-type image sensing array to detect a high quality digital image of the object, independent of the relative motion between said object and hand-supportable housing.

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