Image reader comprising CMOS based image sensor array

An image reader for collecting image data from a target, the image reader comprising:na 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;wherein the image reader includes a first user selectable mode of operation and a second user selectable mode of operation;an illumination module configured to illuminate the target during an illumination period;wherein the image reader is operative so that with the first user selectable mode of operation active, exposure of pixels of a plurality of different rows of said CMOS based image sensor array is initiated sequentially responsively to an initiation of a decode attempt; andwherein the image reader is operative so that with the second user selectable mode of operation active, exposure of pixels of a plurality of different rows of said CMOS based image sensor array is initiated simultaneously responsively to an initiation of a decode attempt.

An image reader for collecting image data, the image reader comprising:nan integrated circuit including a CMOS based image sensor array, wherein the CMOS based image sensor array comprises pixels that include a photosensitive region, and an opaque shielded region;an imaging lens directing and focusing reflected radiation;global electronic shutter control circuitry, the global electronic shutter control circuitry configured to cause exposure of a plurality of pixels of the CMOS based image sensor array during an exposure period;a light emitting diode;wherein the image reader is configured so that light emitted by the light emitting diode is directed toward a target during an illumination period;wherein the image reader is configured so that at least a portion of the illumination period occurs during the exposure period, and wherein said illumination period is less than a frame time of said image reader;wherein the global electronic shutter control circuitry is capable of controlling said CMOS based image sensor array so that exposure of pixels of a plurality of different rows of said CMOS based image sensor array is initiated simultaneously, the global electronic shutter control circuitry controlling the image sensor array to simultaneously expose the pixels of a plurality of different rows of said CMOS based image sensor array;wherein the image reader is further configured so that during each frame exposure period of successive first and second frame exposure periods in which the exposure of pixels of a plurality of different rows of the CMOS based image sensor array is initiated simultaneously, there is a corresponding illumination period in which visible light is directed by the light emitting diode toward the target;wherein the image reader is operative for read out of image data from the CMOS based image sensor array; andwherein the image reader is further operative for utilizing the image data for attempting to decode a bar code symbol.

An image reader for collecting image data, the image reader comprising:nan integrated circuit including a CMOS based image sensor array, wherein the CMOS based image sensor array comprises pixels that include a photosensitive region, and an opaque shielded region;an imaging lens directing and focusing reflected radiation;global electronic shutter control circuitry, the global electronic shutter control circuitry configured to cause exposure of a plurality of pixels of the CMOS based image sensor array during an exposure period;a light emitting diode;wherein the image reader is configured so that light emitted by the light emitting diode is directed toward a target during an illumination period, and wherein the light emitting diode includes a maximum current rating;wherein the image reader is configured to operate with a frame time of less than 40 ms, and is further configured so that at least a portion of the illumination period occurs during the exposure period, wherein said illumination period is less than a frame time of said image reader;wherein the image reader is further configured to overdrive the light emitting diode so that a current draw of the light emitting diode during the illumination period is above the maximum current rating;wherein the global electronic shutter control circuitry is capable of controlling said CMOS based image sensor array so that exposure of pixels of a plurality of different rows of said CMOS based image sensor array is initiated simultaneously, the global electronic shutter control circuitry controlling the image sensor array to simultaneously expose the pixels of a plurality of different rows of said CMOS based image sensor array;wherein the image reader is operative for read out of image data from the CMOS based image sensor array; andwherein the image reader is further operative for utilizing the image data for attempting to decode a bar code symbol.

An image reader for collecting image data, the image reader comprising:na light emitting diode for use in illuminating a target, wherein the image reader controls the light emitting diode to emit light during an illumination period, wherein the image reader is configured so that during the illumination period the light emitting diode is driven with a strobed illumination control pulse that is pulsed at a strobing rate;an integrated circuit including a CMOS based image sensor array, wherein the CMOS based image sensor array comprises pixels that include a photosensitive region, and an opaque shielded region;an imaging lens directing and focusing reflected radiation;a global electronic shutter control circuitry, the global electronic shutter control circuitry configured to cause exposure of a plurality of pixels of the CMOS based image sensor array during an exposure period in which exposure of pixels of a plurality of different rows of said CMOS based image sensor array is initiated simultaneously, the global electronic shutter control circuitry controlling the image sensor array to simultaneously expose the pixels of a plurality of different rows of said CMOS based image sensor array;wherein the image reader is configured so that at least a portion of the illumination period occurs during the exposure period, and wherein said illumination period is less than a frame time of said image reader;wherein the image reader is operative for read out of image data from the CMOS based image sensor array; andwherein the image reader is further operative for utilizing the image data for attempting to decode a bar code symbol.