Method and apparatus for detecting failures of a dual matrix sensor array
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United States of America Patent
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Oct 28, 2014
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app pub date -
Apr 12, 2012
filing date -
Apr 12, 2012
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Abstract
The subject matter disclosed herein describes an optical sensor used in a safety system. The sensor includes two pixel matrices on a single substrate. Each of the pixel matrices are arranged in a row and column format, and pixels from one matrix are interspersed with pixels from the other matrix such that alternating pixels in each row and column belong to separate matrices. Two sets of selection logic allow each matrix to be enabled separately. Additional monitoring logic is included to detect shorted pixels and/or shorted selection lines. In addition, the frames generated by each pixel array may be compared to detect variation in performance between arrays.
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