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Vitascope was an early film projector first demonstrated in 1895 by Charles Francis Jenkins and Thomas Armat. They had made modifications to Jenkins' patented Phantoscope, which cast images via film and electric light onto a wall or screen. The Vitascope is a large electrically-powered projector that uses light to cast images.
Electric screens are similar to pull-down screens, but instead of the screen being pulled down manually, an electric motor raises and lowers the screen. Electric screens are usually raised or lowered using either a remote control or wall-mounted switch, although some projectors are equipped with an interface that connects to the screen and ...
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A Zenith 1200 CRT Projector based home theater. Visible extending from the ceiling are three lenses, one each for red, green and blue Black and white CRT projector. A CRT projector is a video projector that uses a small, high-brightness cathode-ray tube (CRT) as the image generating element. The image is then focused and enlarged onto a screen ...
A Stellantis joint venture with Samsung SDI has won a commitment from the U.S. government for up to a $7.54 billion loan to help build two electric vehicle battery plants in Kokomo, Indiana. The ...
So if the screen is 60" wide, the projector needs to be 120" from the screen. A video projector (lens) with a throw ratio of 0.4 or less would be positioned relatively close to the screen, and would be considered a "short throw projector". [3] A video projector that must be positioned very far from the screen would need a "long throw lens" with ...
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