A low-power radio-frequency (RF) receiver is characterized by a decreased current consumption over prior art RF receivers, such that the RF receiver may be used in control devices, such as battery-powered motorized window treatments and two-wire dimmer switches. The RF receiver uses an RF sub-sampling technique to check for the RF signals and then put the RF receiver to sleep for a sleep time that is longer than a packet length of a transmitted packet to thus conserve battery power and lengthen the lifetime of the batteries. The RF receiver compares detected RF energy to a detect threshold that may be increased to decrease the sensitivity of the RF receiver and increase the lifetime of the batteries. After detecting that an RF signal is being transmitted, the RF receiver is put to sleep for a snooze time period that is longer than the sleep time and just slightly shorter than the time between two consecutive transmitted packets to further conserve battery power.

A motor drive unit for driving a motor of a motorized window treatment may comprise software-based and hardware-based implementations of a process for detecting and resolving a stall condition in the motor, where the hardware-based implementation is configured to reduce power delivered to the motor if the software-based implementation has not first reduced the power to the motor. A control circuit may detect a stall condition of the motor, and reduce the power delivered to the motor after a first period of time from first detecting the stall condition. The motor drive unit may comprise a stall prevention circuit configured to reduce the power delivered to the motor after a second period of time (e.g., longer than the first period of time) from determining that a rotational sensing circuit is not generating a sensor signal while the control circuit is generating a drive signal to rotate the motor.

A motor drive unit for driving a motor of a motorized window treatment may comprise software-based and hardware-based implementations of a process for detecting and resolving a stall condition in the motor, where the hardware-based implementation is configured to reduce power delivered to the motor if the software-based implementation has not first reduced the power to the motor. A control circuit may detect a stall condition of the motor, and reduce the power delivered to the motor after a first period of time from first detecting the stall condition. The motor drive unit may comprise a stall prevention circuit configured to reduce the power delivered to the motor after a second period of time (e.g., longer than the first period of time) from determining that a rotational sensing circuit is not generating a sensor signal while the control circuit is generating a drive signal to rotate the motor.

A curtain hanging assembly that consists of a curtain assembly able to effect horizontal opening and closing of curtains, and includes two elastic motor units provided with elastic feedback. Interactive dynamics between the two elastic motor units, through linear linkage, respectively cause torque forces produced to be in mutual opposition, enabling the let down area of the curtains to be naturally fixed at any height position.

A curtain hanging assembly that consists of a curtain assembly able to effect horizontal opening and closing of curtains, and includes two elastic motor units provided with elastic feedback. Interactive dynamics between the two elastic motor units, through linear linkage, respectively cause torque forces produced to be in mutual opposition, enabling the let down area of the curtains to be naturally fixed at any height position.

A motor drive system for operating a mechanism for raising and lowering window coverings includes a motor operating under electrical power and an electrically powered drive system. The motor drive system advances a continuous cord loop in response to positional commands from a controller. An input-output device includes a capacitive touch strip that receives user inputs along an input axis, and an LEDs strip aligned with the input axis. A group mode module communicates the positional commands to other motor drive systems within an identified group to operate respective other mechanisms of the other motor drive systems. A set control module enables user calibration of a top position and a bottom position of travel of the window covering. The input-output device extends vertically on the exterior of a housing for the motor drive system, and the housing supports input buttons of the group mode module and the set control module.

A motor drive system for operating a mechanism for raising and lowering window coverings includes a motor operating under electrical power and an electrically powered drive system. The motor drive system advances a continuous cord loop in response to positional commands from a controller. An input-output device includes a capacitive touch strip that receives user inputs along an input axis, and an LEDs strip aligned with the input axis. A group mode module communicates the positional commands to other motor drive systems within an identified group to operate respective other mechanisms of the other motor drive systems. A set control module enables user calibration of a top position and a bottom position of travel of the window covering. The input-output device extends vertically on the exterior of a housing for the motor drive system, and the housing supports input buttons of the group mode module and the set control module.

A multi-curtain assembly has curtain segments of a retractable curtain, the curtain segments having leading edges affixed to a bottom bar and extending between opened and closed positions by winding on and unwinding from a barrel assembly, each curtain segment being optionally connectable to the other curtain segment adjacent thereto by a fastener at respective adjacent edges of each curtain segment during unwinding. The multi-curtain assembly includes: a motor driving the barrel assembly of a first curtain segment, adjacent and further curtain segments meeting one another at an interface angle; and at least one curtain driving interface that passes along a rotational barrel driving force from the barrel assembly of the first one of the plurality of curtain segments. The driving interface being an interface for angle of 90 degrees, of less than 90 degrees, or greater than 90 degrees, or an interface for barrel assemblies at different heights.

A multi-curtain assembly has curtain segments of a retractable curtain, the curtain segments having leading edges affixed to a bottom bar and extending between opened and closed positions by winding on and unwinding from a barrel assembly, each curtain segment being optionally connectable to the other curtain segment adjacent thereto by a fastener at respective adjacent edges of each curtain segment during unwinding. The multi-curtain assembly includes: a motor driving the barrel assembly of a first curtain segment, adjacent and further curtain segments meeting one another at an interface angle; and at least one curtain driving interface that passes along a rotational barrel driving force from the barrel assembly of the first one of the plurality of curtain segments. The driving interface being an interface for angle of 90 degrees, of less than 90 degrees, or greater than 90 degrees, or an interface for barrel assemblies at different heights.

A smart window including a motorized shade is provided, particularly where the smart window includes a frame portion having a first subframe and a second subframe for mounting the smart window and routing the motor wirings. In a described embodiment, the smart window comprises: a frame portion including a wiring chase positioned internal to the frame portion and a glass portion. The glass portion may comprise a motorized shade, the motorized shade including a motor, a motor wiring, and a shade roll; a first pane of glass attached to the frame portion on an exterior side of the smart window; and a second pane of glass attached to the frame portion on an interior side of the smart window; wherein the frame portion surrounds the glass portion, wherein the motorized shade is attached to the frame portion between the first pane of glass and the second pane of glass by a hanging system, and wherein the motor wiring is positioned internal to the frame portion and the wiring chase.