Rear projection television or RPTV is the technology behind the modern day large screen television display and until recently catered to consumers as the only option for an affordable large screen TV experience. Magnifying Details - How Does a Rear Projection TV Works? As the name implies, RPTV uses a projector to magnify a small image from the video signal onto a large screen. The projector uses a bright beam of light and a lens system to project the image to a much larger size. The traditional TV setups are in some ways similar to the RPTVs. The television box contains the projector inside and the projector projects the image form behind the screen. Different Projection System for RPTVs CRT Projectors The earliest RPTV technology, CRT backed RPTVs were the first to exceed 40 inch screens. They were bulky and the picture was unclear at close range. DLP Projectors A DLP projector creates an image using a DMD chip, which on its surface contains a large matrix of microscopic mirrors, each corresponding to one pixel in an image. LCD Projectors In these RPTVs, a lamp transmits light through a small LCD chip made up of individual pixels to create an image. RPTV Faces Stiff Competitions from LCD and Plasma The weight of earlier RPTVs required it to be wall-mounted, and though most consumers dont wall mount their sets, the ability to do so is considered a vital selling point. The modern-day rear projection TVs have a smaller footprint than their predecessors and the recent models are lighter. But RPTVs still fall short compared to the latest LCD and plasma flat panels which are lighter with superior picture resolutions. While popular in the early 2000s as an alternative to more expensive LCD and plasma flat panels, the falling price and improvements to LCDs have led to Sony, Philips, Toshiba, and Hitachi planning to drop rear projection TVs from their lineup. Currently, Samsung, Mitsubishi, ProScan, RCA, Panasonic, and JVC RPTVs remain in the market.
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