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The 3LCD Logo. 3LCD is the name and brand of a major LCD projection color image generation technology used in modern digital projectors. 3LCD technology was developed and refined by Japanese imaging company Epson in the 1980s and was first licensed for use in projectors in 1988.
Video projectors can have a mechanism similar to local backlight dimming to achieve higher contrast ratios by using 6 DLP chips: 3 for display, and 3 for local dimming. [11] [12] A few camcorders have a built-in projector suitable to make a small projection; a few more powerful "pico projectors" are pocket-sized, and many projectors are portable.
Simulation of a spinning zoopraxiscope An early projector and seats from a movie theater. The main precursor to the movie projector was the magic lantern.In its most common setup it had a concave mirror behind a light source to help direct as much light as possible through a painted glass picture slide and a lens, out of the lantern onto a screen.
Early RPTVs were essentially CRT projectors with a mirror to project onto a built-in screen. They were heavy, weighing up to 500 pounds. [25] The first RPTVs to not use CRTs were launched in 2002, using DLP, LCD and LcOS technologies, requiring a UHP lamp. UHP lamps used in projectors and RPTVs require periodic replacement, as they dim with use.
These include, 2K – for most theatre screens, 4K – for large theatre screens, and S2K, which was specifically designed for small theatres, particularly in emerging markets worldwide. On February 2, 2000, Philippe Binant, technical manager of Digital Cinema Project at Gaumont , in France, realized the first digital cinema projection in ...
Opaque projectors are not as common as the overhead projector. Opaque projectors are typically used to project images of book pages, drawings, mineral specimens, leaves, etc. They have been produced and marketed as artists' enlargement tools to allow images to be transferred to surfaces such as prepared canvas, or for lectures and discourses.
Projection screen in a movie theater Home theater projection screen displaying a high-definition television image. A projection screen is an installation consisting of a surface and a support structure used for displaying a projected image for the view of an audience.
Older overhead projectors used a tubular quartz bulb which was mounted above a bowl-shaped polished reflector. However, because the lamp was suspended above and outside the reflector, a large amount of light was cast to the sides inside the projector body that was wasted, thus requiring a higher power lamp for sufficient screen illumination.
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