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Multimedia projectors are very much at service for
office document presentations, but with
the progress in technology, nowadays, projectors are packed with more
functionalities and features. So more choice to unscramble which can be made
less arduous, here, with the tips described cursorily.
Projectors work by producing images on screen by passing light
through LCDs (in LCD projectors), or by reflection in DLP (digital light
processing) projectors or producing images by the use of LEDs(light emitting
diodes). LED projectors are smaller and require less maintenance among the
three . The lamp life in DLP and LCD
require it to be changed more frequently than in LEDs. Movie projectors work by
imparting light on reels of film frames by the effect of mirroring and lens and
producing the images on the white surface or screen whilst synchronizing sound
with the frames.
There are various types of projectors such as 3D, wireless,
pocket (size of 2.4”x6.3”x5.3” and weight
of apprx. 1.0 kgs), portable and interactive; be it for conference room, class room and home theater.
Functionalities:
Office document presentations are supported in the most of the projectors,
however there are other functions more than just presentation. The USB, HDMI
ports allow connection of TV and computer with it if the cables are provided,
providing high-quality digital video; and
even FM transmitter to broadcast audio
to any sound system with an FM radio tuner.
Light Output: The lamp should produce equal to or more than
270 lumens of brightness of light on the screen to be able to have nice viewing
with appropriate size of image. The
various modes, as an extra specifications as mentioned on the product itself
and adjustable, allow better color output and contrast. Projectorreviews.com and
projectorcentral.com have reviews of many projectors.
Resolution: XGA
or 1024x768 as against 800x600 or SVGA produces better document or images as it
has more pixel density, lines and gradients appear distinctively.
These are not the
ultimate guidelines on projectors but covers almost all attributes.
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