COMPACT POWER ACTUATOR FOR WINDOW SHADES
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United States of America Patent
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N/A
Issued Date -
Sep 18, 2014
app pub date -
Jun 12, 2013
filing date -
Mar 15, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A window shade having a power actuation system. The window shade includes a fixed member; a rotatable member that is rotatable relative to the fixed member; a reversible motor mounted to the fixed member, wherein the reversible motor includes a mechanism for driving the rotatable member such that rotation of the reversible motor in a first direction deploys a shade material and rotation of the reversible motor in a second direction stows the shade material; and a control circuit coupled to a set of motor leads of the reversible motor, wherein the control circuit switches the reversible motor among at least three operational states, including: a hold state in which the motor leads are shorted to resist rotation, a deploy state in which the motor leads are connected to a power source to deploy the shade material, and a stow state in which the motor leads are connected in reverse to the power source to stow the shade material.
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