A motorized window treatment may provide a low-cost solution for controlling the amount of daylight entering a space through a window. The window treatment may include a covering material (e.g., a cellular shade fabric or a roller shade fabric), a drive assembly for raising and lowering the covering material, and a motor drive unit including a motor configured to drive the drive assembly to raise and lower the covering material. The motorized window treatment may comprise one or more battery packs configured to receive batteries for powering the motor drive unit. The batteries may be located out of view of a user of the motorized window treatment (e.g., in a headrail or in a battery compartment). The motorized window treatment may use various power-saving methods to lengthen the lifetime of the batteries, e.g., to reduce the motor speed to conserve additional battery power and extend the lifetime of the batteries.

A gearbox that is configured to transmit torque from a motor shaft to a load shaft includes a limit mechanism The limit mechanism includes a strain wave gear including a circular spline, a flex spline and a wave generator. The circular spline is fixed to a housing of the gearbox coaxially with the load shaft, the flex spline is formed on a flexible rim of a rotatable cup that is coaxial with the load shaft, and the wave generator is coupled to the load shaft so as to rotate at the same angular velocity. The limit mechanism further includes at least one limiter structure coupled to the rotatable cup and at least one fixed switch, and is configured to stop rotation of the load shaft when the limiter structure engages the fixed switch.

A motorized window treatment provides a low-cost solution for controlling the amount of daylight entering a space through a window. The window treatment includes a covering material, a drive shaft, at least one lift cord rotatably received around the drive shaft and connected to the covering material, and a motor coupled to the drive shaft for raising and lowering the covering material. The window treatment also includes a spring assist unit for assisting the motor by providing a torque that equals the torque provided by the weight on the cords that lift the covering material at a position midway between fully-open and fully-closed positions, which helps to minimize motor usage and conserve battery life if a battery is used to power the motorized window treatment. The window treatment may comprise a photosensor for measuring the amount of daylight outside the window and temperature sensors for measuring the temperatures inside and outside of the window. The position of the covering material may be automatically controlled in response to the photosensor and the temperature sensors to save energy, or may also be controlled in response to an infrared or radio-frequency remote control.

A motorized shade comprising a roller tube, a shade material connected to the roller tube, and a motor drive unit operably connected to the roller tube. The motor drive unit comprises a motor adapted to create torque to rotate the roller tube to lower or raise the shade material and a force sensor positioned at a point along the motor drive unit that resists the torque created by the motor resulting in a reaction force that is detected by the force sensor. The motor drive unit further comprises a motor control module adapted to receive sensor readings from the force sensor and control the motor in response to detecting an abrupt change in the reaction force using the received sensor readings to enable shade control via pulling of the shade material as well as or alternatively obstacle detection to minimize damage to the roller shade and users.

An intelligent driving device is provided which comprise a housing, and an end face of the housing is provided with a motor and a power source; the power source and the motor are arranged up and down in parallel, a main control board is disposed inside the housing, the motor and the power source both are electrically connected to the main control board, and the power source, the main control board and the motor are arranged into a U shape. In this case, the electric curtain will be made shorter and applicable to mounting in the spaces of various sizes. Thus, the small size can be guaranteed, and more intelligent chips can be disposed, thereby satisfying the intelligent development of the electric curtains.

An object handling system is described, the system having two substantially perpendicular sets of rails forming a grid above a workspace, the workspace having a plurality of stacked containers. The system includes a series of robotic load handling devices operating on the grid above the workspace, the load handling devices having a body mounted on wheels. The robotic devices can move around the grid under instruction from a computing device, the robotic devices being moved to a point on the grid above a stack of containers and then, using a lifting device, engage and lift a container from the stack. The container is then moved to a point where the objects in the container can be accessed. Modifications to the workspace and grid are described that allow vehicles and roll cages to be used to move stacks from the workspace to a point outside the workspace or from outside the workspace into the workspace.

The present invention relates in general to a self-contained, solar-powered, self-regulating intelligent automated window treatment with increased energy efficiency. In particular, in accordance with one embodiment, the invention relates to a self-contained, solar-powered, self-regulating intelligent automated window treatment with increased energy efficiency consisting of: (1) a headrail with at least one solar panel, a rechargeable battery that is charged by the solar panel, and a motor that is powered by the rechargeable battery; (2) window shade fabric with one terminus of the fabric affixed to a tube and with the fabric wrapped around the tube and located within the headrail; (3) a smart bottom rail attached to the terminus of the shade fabric furthest from the tube with the bottom rail containing, at least one environmental sensor, at least one control button, at least one solar panel, and a rechargeable battery that is charged by the solar panel and that provides power to the environmental sensors and control buttons. The environmental sensors will provide information that will be used to determine when the shade motor should automatically raise and lower the shade with minimal effort from the user. In addition to relying on solar power, the automatic adjustment of the window treatment will allow for a reduction of energy consumption by the user by decreasing the need for artificial lighting, heating, and air conditioning. In another embodiment of the invention, solar power stored in the rechargeable battery of the bottom rail may be transferred to the rechargeable battery-powered motor of the headrail.

Certain embodiments are directed to control methods, window controllers, and uninterruptible power supplies for determining tinting instructions for optically switchable windows to reduce power usage at a site during a reduced power event. In some cases, reduced power operations are initiated by a window controller upon receipt of a trigger signal from an uninterruptible power supply sent when it detects a power loss. In some cases, tinting instructions are based on the remaining charge left on the uninterruptible power supply. In some cases, reduced power operations are delayed for a period of time.

A motor driven system for raising and lowering a window covering executes motor ramp trajectory speed control. The motor ramp trajectory limits acceleration of an external motor from the idle (stationary) state to full operating speed, and limits deceleration of the motor from full operating speed back to the idle state. This function reduces stresses on a continuous cord loop drive mechanism. A control system manages solar heating effects in response to sunlight entrance conditions such as system sensor outputs, external weather forecasts, and other data sources. The system automatically opens or close the window covering to increase or decrease admitted sunlight under appropriate conditions. The input interface of the control system includes a visual display and input axis, which are aligned vertically if the window covering mechanism raises and lowers the window covering, and are aligned horizontally if the window covering mechanism laterally opens and closes the window covering.

A window covering for a window having a window frame. The window covering includes a headrail at the top of the window frame, and two window shades suspended from the headrail that can be selectively independently raised and lowered. Each of the window shades has a different light property. Accordingly the two window shades can be deployed selectively independently to achieve a desired property of light passing through the window shade.