Patent ID: 6624849
Filing Date: 2003-09-23
Classification: H04N

Abstract:
A solid-state imaging apparatus for motion detection, comprising:a plurality of solid-state pixels each pixel having a photoreceptive element that generates a charge potential in response to incident light on the photoreceptive element and the pixel provides a pixel output of a pixel signal corresponding to the charge potential, the plurality of pixels arranged in a matrix having at least one row and one column; a plurality of read lines in communication with a respective number of columns of the plurality of pixels; a first transfer circuit that controls pixel output so that a first pixel signal is provided to a respective read line for each pixel of a selected row of pixels and a second pixel signal is provided to the respective read line for each pixel of the selected row of pixels in a time division manner; a plurality of comparison circuits in communication a respective plurality of the vertical read lines, each comparison circuit compares the first pixel signal and the second pixel signal and provides a respective plurality of comparison signals; a horizontal transfer circuit that receives the plurality of comparison signals and transfers the comparison signals serially; a logical calculation circuit that serially receives the comparison signals and performs a logical calculation on the comparison signals and provides a logical calculation signal to detect motion of an object; an image signal output circuit in communication with the plurality of read lines that provides an image signal corresponding to the incident light on the photoreceptive elements; a level decision circuit that determines a level of the image signal from the image signal output circuit; and an output switching circuit that switches and outputs the logical calculation signal and the comparison signal according to the level of the image signal.