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The keystone effect is the apparent distortion of an image caused by projecting it onto an angled surface. It is the distortion of the image dimensions, such as making a square look like a trapezoid, the shape of an architectural keystone, hence the name of the feature. In the typical case of a projector sitting on a table, and looking upwards ...
LCD projector. An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector. To display images, LCD ( liquid-crystal display) projectors typically send light from a metal-halide lamp through a prism or series ...
A video projector is an image projector that receives a video signal and projects the corresponding image onto a projection screen using a lens system. Video projectors use a very bright ultra-high-performance lamp (a special mercury arc lamp ), Xenon arc lamp, metal halide lamp, LED or solid state blue, RB, RGB or remote fiber-optic RGB lasers ...
According to monitoring site DownDetector, user-reported YouTube problems began spiking at around 7 p.m. ET. The issues appeared most acute in the Northeast U.S., the U.K. and Western Europe, as ...
Cinerama. Cinerama is a widescreen process that originally projected images simultaneously from three synchronized 35mm projectors onto a huge, deeply curved screen, subtending 146-degrees of arc. Subtending refers to the pathways of the projected images from the synchronized projectors onto the curved screen overlapping each other at one point.
No cooling fans. Internal prism focus system with a single projection lens. 50 inch fixed screen projector with two projector lenses with three tubes. 60 fL on screen brightness. 72 inch fixed screen projector with two projector lenses with crt three tubes. 30 fL on screen brightness.
Rear-projection television ( RPTV) is a type of large-screen television display technology. Until approximately 2006, most of the relatively affordable consumer large screen TVs up to 100 in (250 cm) used rear-projection technology. A variation is a video projector, using similar technology, which projects onto a screen .
SIM1 and SIM2 genes are Drosophila single-minded (sim) gene homologs. The Drosophila sim gene encodes a transcription factor that is a master regulator of neurogenesis of midline cells in the central nervous system. SIM2 maps within the so-called Down syndrome chromosomal region, specifically on the q arm of chromosome 21, band 22.2. [6]