The invention relates to an assembly of a tilt control cord (106) and a fastening element (1) for fastening to a slat (102A) of a window covering. The fastening element has an elongate body with a length corresponding to the width of the slat. The fastening element includes second fastening means for attaching the ends of the tilt control cord.

The invention also relates to a window covering having a cord spool (104), wherein the tilt control cord (106) is wrapped around the cord spool (104) and extends to the top slat (102A) on which the fastening element (1) is attached.

The invention also relates to a method of assembling the window covering.

A method of making a daylight redirecting window film having a layered structure with a total thickness of less than one millimeter and having at least two optical films bonded together. One of the optical films has a first light redirecting layer disposed on a first side of the film and including a linear array of light redirecting structures configured to reflect light using a total internal reflection and defining a parallel array of narrow channels, and a second light redirecting layers disposed on an opposite second side of the film and including light scattering surface microstructures. The method includes coating a surface of at least one of the films with an optical adhesive, positioning the optical films such that the top portions of the light redirecting structures face inwards, and bonding the films together to form a monolithic multi-layer light redirecting film structure.

In one aspect, a cellular slat for a covering for an architectural structure includes an outer sock forming an outer cellular structure and an inner core configured to be positioned within the outer cellular structure. The inner core includes first and second ends and first and second fold edges formed between the first and second ends. With the inner core positioned within the outer sock, the inner core forms an inner cellular structure having a first curved profile extending along the first side of the cellular structure between the first and second fold edges and a second curved profile extending along the second side of the cellular structure between the first and second fold edges. Additionally, the inner core is in an at least partially detached state relative to the outer sock along at least a portion of an interface defined between the inner core and the outer sock.

In one aspect, a cellular slat for a covering for an architectural structure includes an outer sock forming an outer cellular structure and an inner core configured to be positioned within the outer cellular structure. The inner core includes first and second ends and first and second fold edges formed between the first and second ends. With the inner core positioned within the outer sock, the inner core forms an inner cellular structure having a first curved profile extending along the first side of the cellular structure between the first and second fold edges and a second curved profile extending along the second side of the cellular structure between the first and second fold edges. Additionally, the inner core is in an at least partially detached state relative to the outer sock along at least a portion of an interface defined between the inner core and the outer sock.

A device for day lighting the interior of structure deploys reflective louvers that are spaced apart in stacks. The louvers include a coating or multilayer structure that is operative to reflect visible light but transmit IR light through the louver. The louvers also have a retro-reflective structure to return the IR light by reverse reflection in the opposite direction of the incident light, which is back toward the sun. The interior of the structure is more uniformly illuminated with visible light while the louvers and interior are not heated by IR light or radiation from the sun.

An expandable shutter assembly for installing shutters in windows of varying widths includes a frame that has a first section slidably engaging a second section such that the frame has an adjustable length. A plurality of shutters is each pivotally coupled to the frame, and the shutters are positionable between an open position and a closed position. Each of the shutters comprises a first portion slidably engaging a second portion such that each of the shutters has an adjustable length to correspond to the length of the frame. A linkage is movably coupled to each of the shutters and the linkage urges each of the shutters between the open position and the closed position.

A shutter is provided. First and second side rails have cavities running in a direction from top to bottom, each cavity having an opening along a lateral side. A plurality of pairs of slat supports are present, each pair having a slat support mounted in the cavity of the first rail and mounted in the cavity of the second rail. Each slat support has a first section and a second section. The first section has a shape to slide into one of the cavities, and to stack and nest with an adjacent first section of another slat support in the one of the cavities. The second section protrudes through the opening of the one of the cavities. A plurality of slats are present, each slat being mounted on the second sections of one of the pairs of slat supports.

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.

A daylight redirecting window film formed by a flexible multi-layer film laminate with a total thickness of less than one millimeter and configured to be applied to an indoor-facing window surface of a building facade. The window film includes a pair of outer film substrates flanking a light redirecting core layer. The core layer includes a parallel array of channels defining total internal reflection (TIR) surfaces and linear optically transmissive structures protruding transversely thought the core layer and bonded to the outer film substrates. A light output surface of the outer film substrate which is disposed on an indoor-facing side of the laminate includes a two-dimensional pattern of light scattering microstructures which are configured to spread light at least in a plane that is perpendicular to the channels. The TIR surfaces intercept and reflect a portion of sunlight propagating through the core layer such that the window film redirects that portion of incident sunlight towards a plurality of divergent directions, forming relatively high bend angles.

A slat angle adjustment mechanism adapted for use with slats of a Venetian blind includes a body shell and a transmission unit. The transmission unit includes a transmission gear set and a retractable member. The transmission gear set has a gear and a screw. A position-limiting hole of the gear corresponds in position to a second through hole of the body shell. The retractable member connects to the extendible segment of the screw and undergoes reciprocating motion along the extendible segment of the screw. Pulling the retractable member from an initial first position of the extendible segment of the screw to a second position of the extendible segment of the screw allows a rib of the body shell to be confined to a limiting portion of the retractable member. Therefore, the slat angle adjustment mechanism is capable of extension, retraction, engagement and fixation.