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Video projector
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<p>A video projector is an <a href="/facts/Image_projector/ucQKkpAS">image projector</a> that receives a <a href="/facts/Video_signal/F1AV8ben">video signal</a> and projects the corresponding image onto a <a href="/facts/Projection_screen/EfJYBwt2">projection screen</a> using a <a href="/facts/Lens_(optics)/ejlH6n5c">lens</a> system. <a href="/facts/Video/F1AV8ben">Video</a> projectors use a very bright <a href="/facts/Ultra-high-performance_lamp/hS0k6uQ9">ultra-high-performance lamp</a> (a special <a href="/facts/Mercury_arc_lamp/cVCl1CSY">mercury arc lamp</a>), <a href="/facts/Xenon_arc_lamp/xhQlMhDn">Xenon arc lamp</a>, <a href="/facts/Metal-halide_lamp/kxCKb1E9">metal halide lamp</a>, <a href="/facts/LED/gE8x4MDb">LED</a> or solid state blue, RB, <a href="/facts/RGB_color_model/3Be0zwCj">RGB</a> or <a href="/facts/Fiber-optic/5ruuIFbj">fiber-optic</a> <a href="/facts/Laser/jk6PTvvT">lasers</a> to provide the illumination required to project the image. Most modern projectors can correct any curves, blurriness and other inconsistencies through manual settings. </p><p>Video projectors are used for many applications such as conference room <a href="/facts/Presentation/InRKd0W2">presentations</a>, classroom training, <a href="/facts/Home_cinema/Yuue1prS">home cinema</a>, <a href="/facts/Movie_theater/oSkG3tKp">movie theaters</a>, and <a href="/facts/Concerts/TaJqQquh">concerts</a>, having mostly replaced <a href="/facts/Overhead_projector/M8V2Y4xa">overhead</a>, <a href="/facts/Slide_projector/b2N84a91">slide</a> and conventional <a href="/facts/Movie_projector/SXzyFeDQ">film projectors</a>. In schools and other educational settings, they are sometimes connected to an <a href="/facts/Interactive_whiteboard/hGats95G">interactive whiteboard</a>. In the late 20th century, they became commonplace in home cinema. Although large <a href="/facts/LCD_television/k6YB3J0k">LCD television</a> screens became quite popular, video projectors are still common among many home theater enthusiasts. In some applications, video projectors have been replaced with large monitors or LED screens, or their replacement has been explored. </p>