COMPUTER-IMPLEMENTED METHOD OF GENERATING PWM CONTROL SIGNALS, AND CORRESPONDING COMPUTER PROGRAM, COMPUTER-READABLE STORAGE MEDIUM AND APPARATUS
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United States of America Patent
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Issued Date -
Mar 21, 2024
app pub date -
Dec 14, 2021
filing date -
Dec 14, 2020
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Abstract
A computer-implemented method driving an actuator component that drives movement of a movable part relative to a support structure, an image sensor fixed relative to the movable part or the support structure. The image sensor carries out CDS so as to read, offset in time by a sampling period, a reference signal and a light-sensing signal, and outputs a sync signal prior to CDS. The method comprises receiving the sync signal; generating PWM control signals at a PWM frequency substantially equal to an integer multiple of the reciprocal of the sampling period; during a sensing interval, suspending generating PWM control signals to drive the actuator component; and scheduling the sensing interval to start a time delay after receiving the sync signal, such that the sensing interval overlaps with both or neither of a duration of reading the reference signal and a substantially equal duration of reading the light-sensing signal by the image sensor.
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