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Multimedia projector or digital projector is the information visualization device directly
connected either to a computer signal source (PC or laptop, LAN, etc.)
instead
of a computer monitor (stationary PC monitor can be connected to a separate
output of your projector; your notebook`s display remains active), or to a video
signal source (video recorder, video camera, DVD-player, satellite TV system,
etc.) instead of a TV-set. The device provides image projection on
any size
screen, depending, of course, on the user`s choice and technical capabilities of
the projector correspondingly.
Contemporary projectors are characterized by compactness and little weight
(except those specially designed for stationary use); are not afraid of
transportation and are always ready for operation. The multimedia projector
requires no special programs, working with it resembles work with a PC monitor:
any projector likewise a PC monitor or a TV-set has adjustments of brightness
and contrast, shift of image to the left or to the right, etc. Digital
projectors need no complicated and frequent adjustments; they have only several
control buttons and a convenient screen menu (often in Russian).
The only part of projector subject to replacement is the projection lamp.
Multimedia projectors use special high brightness lamps with more even ? in
comparison with incandescent lamps ? spectrum. Average projection lamp life is
1500 ? 2000 hours of operational mode. Many projectors have so called ?Economy
mode of operation? function, which considerably increases lamp life time.
If you need more information about multimedia (digital) projectors please visit the following page 
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