Question

led monitors vs projection display

Answer 1

An LED monitor (short for Light Emitting Diode) or LED display is a flat screen, flat panel computer monitor or television. It has a very short depth and is light in terms of weight. The actual difference between this and a typical LCD monitor is the backlighting. The first LCD monitors used CCFLinstead of LEDs to illuminate the screen.

LED monitor advantages
LED monitors offer many benefits when compared to those that are CCFL lit including:
Typically are less expensive
Broader dimming range
 Overall more reliable
 They run at a lower temperature, and consume much less power, as few as 20 watts
 Higher dynamic contrast ratio
 Longer lifespan and less environmental impact

A digital projector, also called a digital projection display system, is a specialized computer display that projects an enlarged image on a movie screen. Such devices are commonly used in presentations.
There are two main types of digital projection display systems. The older, less expensive type employs three transparent liquid-crystal-display ( LCD ) panels, one for each of the primary colors (red, green, and blue). The light transmittivity of each pixel varies depending on the image data received from the computer. The light from a lamp is directed through the LCD panels, collimated using a lens, and projected onto a screen.