548 results about "Venetian blinds" patented technology

A light valve such as an active matrix LCD between crossed polarizers, utilizing, for instance, individual transistors to control each "pixel area" of the LCD and storage elements to store video signal data for each pixel, with optically shielded "dead spaces" between pixels to eliminate electric field cross-talk and non-information-bearing light bleed-through, is illuminated with a bright independent light source which creates a video image projected via specialized projection optics onto an internal or external screen without distortions, regardless of the angle of projection onto the screen. Use of heat sinks, IR reflective coatings, heat absorbing optics, optional fluid and a thermistor controlled pixel transistor bias voltage injection servo circuit stabilizes image performance, maintaining accurate color and contrast levels as the LCD changes temperature. In one embodiment of the invention, use of a multi-color LCD with a stepped cavity, producing different thicknesses of LCD for the different wavelengths that pass through it, allows a linear correspondence between the wavelengths passing through the LCD to produce true black, high contrast and CRT-like color rendition. A dichroic mirror arrangement is used to overlap differently colored pixels in the projected image. Use of striped mirrors duplicate pixels, where necessary, eliminating spaces between pixels, creating a continuous image with no apparent stripes or dots. A special venetian-blind type of screen is also disclosed and methods for using the system to view three-dimensional video are also explained.

A cord winding device for a Venetian blind includes a receiving unit, a resilient driving unit mounted in the receiving unit, a braking unit mounted in the receiving unit and adjacent to the resilient driving unit, and a unidirectional damping unit mounted in the receiving unit. Through cooperation between the braking unit and the resilient driving unit, during winding and unwinding of pull cords, a bottom rail can be descended slowly and stopped conveniently at any desired height.

Print heads with arcuate printing surfaces are used to apply images to elongated, laterally curved slats prior to their assembly into Venetian blinds. Each print head includes a print head casing having a concave or convex printing surface forming an arc shape. The print heads are distributed in series along a slat path, which is defined by a conveyor. One or more ink wells are coupled to the print head casing; each ink well may contain a separate color of ink. Many print jet orifices are evenly distributed along the printing surface, and may be arranged in an array with multiple rows and columns, for example. Each print jet orifice is coupled to one of the ink wells by a supply path. During the printing process, slats are longitudinally advanced along the slat path past the print heads. A controller regulates the slat's position relative to the print heads, and controls the position using the conveyor. At selected times, depending upon the slat's position, the controller activates selected ink jets of selected print heads to eject ink upon the curved slat, and thereby imprint a desired image upon the slat. The images imprinted on individual slats are coordinated to provide a desired, overall image spanning the Venetian blinds.

A venetian blind provided in double glazing unit, which is mounted in a space defined by two sheets of glass, side frames, a top frame and a bottom frame, the venetian blind comprising a blind body composed of a counterweight, a long axis and a plurality of leaves, a driving unit, and two magnets, one of which being fixed to said sliding block and the other one being located outside the double glazing unit. The venetian blind could be lifted and deflect by the linear movement or rotation of the two magnets, one of which is inside the double glazing unit and the other one is outside the double glazing unit in the case that the double glazing unit is completely sealed. The venetian blind of the present invention is simple in structure and convenient for operating.

A Venetian blind cutting machine is constructed to include a machine base, two blind locating modules mounted on the machine base at different elevations, each of which having a set of through holes for supporting component parts of a Venetian blind to be cut, a blind carriage adapted to carry the Venetian blind to be cut, a carriage for moving the blind carriage to the elevation of one of the blind locating modules for enabling the Venetian blind to be cut to be put in the selected blind locating module for cut, a cutter provided at the other side of the blind locating modules, and a cutter drive adapted to move the cutter across the imaginary axis passing through each of the through holes of the blind locating modules to cut the component parts of the loaded Venetian blind and then to return the cutter after cutting.

An automated blind assembly is disclosed including a shaft connected to a rotatable slat and a motor connected to the shaft. The motor operates to rotate the shaft and thereby rotate the rotatable slat.

In a cutting machine for cutting down Venetian blinds a headrail cutter and a bottom rail cutter are provided which move along a horizontal axis. After the headrail and bottom rail are trimmed a slat cutter moves in a vertical axis, up or down to cut the slats. The cutting machine enables one to cut down a venetian blind while the opposite end of the blind remains in the packing box. Preferably, a spacer or collar is provided on the blind prior to packaging so that the headrail, window covering material and bottom rail will be spaced apart from one another a desired amount. That spacing should be the same spacing as the openings in the cutting machine so that when one end of the blind is removed from the package that end of the blind can be readily inserted into the cutting mechanism.

A clear tubular container consisting of two sections, one slightly smaller than the other, that can telescope to a smaller size. A flexible tab locking mechanism prevents the tubular structure from increasing in length beyond its original size but allows the structure to easily telescope to a smaller size. Removable caps are mounted at each end. The caps can be removed and the container telescoped to a smaller size to allow the window blinds to be trimmed without removing them from the container. The container's length can be easily varied by changing the placement of the tab and window.

A daylighting system comprising one or more light redirecting elements and a horizontal slat Venetian blind. The light redirecting elements are inserted between the slats of the Venetian blind and are supported between the slats and the outer strings of the Venetian blind. Each light redirecting element is a thin strip of reflective material formed into an angle section. The upper arm of the angle section reflects sunlight upwards through the Venetian blind and deeply into the interior of the building. The side arm of the angle section reflects sunlight back out of the window. The reflecting surface of an upper arm of a light redirecting element is treated to reflect light diffusely into a narrow angular range. The reflecting surface of a side arm of a light redirecting element is treated to reflect light diffusely into a wide angular range. The daylighting system is installed in the window of a building to redirect sunlight on to the ceiling of the building to improve natural illumination in the building.