Title :
A CMOS motion detector system for pointing devices
Author :
Arreguit, Xavier ; Van Schaik, F. André ; Bauduin, Francçis V. ; Bidiville, Marc ; Raeber, Eric
Author_Institution :
CSEM, Neuchatel, Switzerland
fDate :
12/1/1996 12:00:00 AM
Abstract :
A motion detector system uses an array of 93 photodiodes integrated along with processing circuits to detect the motion of a printed random pattern on a ball used in a pointing device application. It is based on the detection and tracking of spot edges passing over a matrix of pixels during the period between two light pulses. Motion in x and y directions is estimated by aggregating local information about moving edges over the photosensitive pixels. The 4.4×4.3 mm2 chip detects the ball motion from 0 to 11.8 in/s with a resolution higher than 800 dpi over a 100-2000 mW/m2 light-intensity range
Keywords :
CMOS integrated circuits; image sensors; photodiodes; position measurement; CMOS motion detector system; ball motion; moving edges; photodiode array; photosensitive pixels; pointing devices; printed random pattern; processing circuits; Analog computers; Circuits; Detectors; Energy consumption; Motion detection; Motion estimation; Optical design; Optical devices; Optical sensors; Photodiodes;
Journal_Title :
Solid-State Circuits, IEEE Journal of
