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Bar code reading device with global electronic shutter control

DC
  • US 7,568,628 B2
  • Filed: 03/11/2005
  • Issued: 08/04/2009
  • Est. Priority Date: 03/11/2005
  • Status: Active Grant
First Claim
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1. A complementary metal oxide semiconductor (CMOS) based image reader for collecting image data from a target, the CMOS based image reader comprising:

  • a CMOS based image sensor array, the CMOS based image sensor array comprising a plurality of rows of pixels, each of the pixels of the CMOS based image sensor array being an active pixel comprising a pixel amplifier, a photosensitive region and an opaque shielded data storage region;

    a hand held housing encapsulating said image sensor array;

    a timing module in electrical communication with the CMOS based image sensor array, the timing module configured to simultaneously expose a full frame of pixels of the CMOS based image sensor array during an exposure period;

    an illumination module configured to illuminate the target during an illumination period, the illumination module in electrical communication with the timing module;

    a control module in electrical communication with the timing module and the illumination module, the control module configured to cause at least a portion of the exposure period to occur during the illumination period;

    wherein said CMOS based image sensor array is capable of being controlled so that exposure of pixels of a plurality of different rows of said CMOS based image sensor array is initiated simultaneously, and wherein said illumination period is less than a frame time of said CMOS based image reader; and

    a bar code processing module capable of identifying representations of bar code symbols in collected image data.

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