Rear projection television or RPTV will be the technology behind the modern day large screen television and projector DLP and until recently catered to customers as the only option for an affordable large screen TV experience.

Magnifying Details - How Does a Rear Projection TV Work?

As the name implies, RPTV uses a projector to magnify any size image from the video signal onto a big screen. The projector uses a bright beam of light plus a lens system to project the image to a much larger size. The traditional TV setups are in some methods similar to the RPTVs. The television box contains the projector inside and the projector projects the image form behind the screen.

CRT Projectors

The earliest RPTV technology, CRT backed RPTVs were the first to exceed 40 inch screens. They were bulky plus the picture was unclear at close range.

Projector DLP

The best projector DLP creates a image utilizing a DMD chip, which on its surface contains a big matrix of microscopic mirrors, each corresponding to one pixel in an image.

LCD Projectors

In these RPTVs, a lamp transmits light via a little LCD chip made up of individual pixels to create an image.

RPTV Faces Stiff Competition with LCD and Plasma

The weight of earlier RPTVs was much heavier than current ones, and weren't able to be wall mounted easily or at all and though most customers don't wall mount their sets, the ability to do so is actually 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 plus plasma flat panels which are lighter with superior picture resolutions.

While popular in the early 2000s as an alternative to much more expensive LCD and plasma flat panels, the falling price plus 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 within the market.

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