A window blind assembly to provide illumination to the interior of a room and to prevent sunlight from entering the room includes a multitude of the light emitting diode (LED) slats mounted in the window opening of a window frame and being rotatably connected to the window frame: a controller being embedded in the window blind assembly and configured to control the function of each row of the LED slats.

Power control for environmental control components (e.g. lighting, blinds, temperature) is controlled and distributed by a regulated power controller in accordance with user preferences and/or a schedule. The outputs of the regulated power controller include at least one regulator capable of a mixed mode output, operable in any of several output modes that can include DC regulation and pulse width modulation, as well as polarity inversion. The centralized control of electrical power facilitates the coordination of environmental control components for holistic control.

A multistate resistance adjusting device for a non-pull cord window blind includes a base, an adjusting unit, and an elastic member. The base has a bottom trough provided on the periphery thereof with positioning grooves. The adjusting unit has a control pin provided with a transmission portion rotatable and vertically movable on the base and a positioning portion provided on the outer peripheral surface of the transmission portion and connected with an adjusting rod. When the positioning portion is engaged with one of the positioning grooves, the control pin is disabled from rotating relative to the base and adjusting the resistance applied on the lift transmission cord. When the control pin is moved upwardly to separate the positioning portion thereof from the positioning groove, the control pin is rotatable relative to the base, and the resistance applied on the lift transmission cord is adjustable through the adjusting rod.

The present invention provides a device to control the tilt angle of window blinds. The device is capable of working with existing home automation control systems. The device is configured to operate in one or more modes such as, a primary mode and a secondary mode. In the primary mode of operation of the device is controlled by the home automation controller using a wireless mesh network protocol or a home automation protocol. In the secondary mode, the device 604 is operate independent of the mesh network in a standalone manner.

A window blinds may comprise a headrail, a plurality of track bars, and a plurality of blinds. The headrail has a plurality of parallel rail portions, and two covers respectively cover two lateral ends of the headrail. Each of guiding members formed at an upper portion of the track bar is configured to be received in the rail portion of the headrail. Each of the track bars comprises a connecting groove at a lower portion thereof, and each of the blinds is connected to a strip at an upper edge thereof which is configured to be coupled in the connecting groove. The guiding members of the track bars are arranged and limited in the rail portion of the headrail, thereby enabling the window blinds to be assembled and used easily and reducing the sizes of the headrail and the track bars.

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.

THIS invention relates to a slat for a blind and a blind formed from such slats. More specifically, the invention relates to a customisable rigid slat, or blind made up of a plurality of such customisable rigid slats, that enables the blind to be fitted snugly within any window opening or doorway as a result of the locking adjustability of the width of such slats. The slat includes a pair of elongate slat panels movable relative to one another between retracted and extended conditions, such that the operatively width of the slat is greater in the extended condition than in the retracted condition. The slat further includes one or more fasteners, located at or near each of a pair of minor ends of the slat panels, for releasably fixing the pair of slat panels to one another in the retracted condition, the extended condition and/or any condition there between, thereby to operatively restrict relative movement between the slat panels in such condition.

A cord winding mechanism for a blind cord with a first end fixed to a window blind includes a base, a cord winder rotatably mounted to the base, a cord guiding assembly mounted to the base, and an elastic press member mounted to the base. The cord winder defines an annular slot to wind the blind cord layer by layer. The cord guiding assembly is abutted against an unwound portion of the blind cord between the cord winder and the window blind. A second end of the blind cord is fixed to an end of the cord winder in the slot. The press member is elastically abutted against a portion of the blind cord just separate from the cord winder.

Disclosed is a window blind chain reel device comprising: a housing, a rotating wheel and a driving shaft, wherein the rotating wheel has a circumferential guide groove with a chain winding space being formed between the circumferential guide groove and the housing, and the rotating wheel is formed with a plurality of engaging concaves corresponding to beads of the window blind chain, wherein the window blind chain is arranged to extend into the housing, extend around the rotating wheel along the chain winding space and then extend outward, and thus when the rotating wheel is rotated by the driving shaft, the chain body of the window blind chain is driven, by the engagement between the beads of the window blind chain and the engaging concaves, to move in a manner that one end thereof is retracted inward and the other end thereof is extended outward.

Disclosed is a drive device for a vertical window blind, comprising: a driving connecting rod, a driving screw rod and an open-and-close transmission rod connected with a slat open-and-close control screw of the vertical window blind, wherein the driving connecting rod drives the slat open-and-close control screw to axially rotate in the horizontal direction by the rotational driving force via the driving screw rod and the open-and-close transmission rod, thereby moving a plurality of slats slidably disposed on the slat open-and-close control screw in the horizontal direction.