Rear-projection television

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Rear-projection television (RPTV) is a type of large-screen television display technology in which the image is projected inside the cabinet from behind onto a diffusing screen at the front. Unlike traditional televisions, a rear-projection television converts electrical video signals into beams of light, directed by an optical lens and mirror system. Until approximately 2006, most of the relatively affordable consumer large screen TVs up to 100 inches (250 cm) used rear-projection technology. A variation is a video projector, using similar technology, which projects onto a screen. Three types of projection systems are used in projection TVs. CRT rear-projection TVs were the earliest, and while they were the first to exceed 40 in (100 cm), they were also bulky and the picture was unclear at close range. Newer technologies include DLP (reflective micromirror chip), LCD projectors, Laser TV and LCoS. They are capable of displaying high-definition video up to 1080p resolution, and examples...

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