A digital projector is a device that connects to a computer or like
devise via cabling to enable the computer monitor display to be enlarged
and projected onto a screen. The standard digital projector connects
via a VGA lead direct to your computer or uses component video cables,
(red, green and blue plugs) to connect to your DVD player, HDTV, set top
box or video camera. However to be safe always make sure to double
check the projector has the right outputs to connect to the devise or
devises you wish to connect it to. Features of a quality digital
projector should include:
Digital Projectors - Resolution
Digital
projector resolution refers to the pixel density of the image to be
projected. A digital projector has two resolutions, the natural
resolution and maximum resolution. The natural resolution is the
standard pixel size of the projected image; the maximum resolution is
the maximum capability of the projector. Typically a digital projector
should be able to accept resolutions of 800x600, 1024x768 or 1280x1024,
however it is not the size of the resolution the digital projector can
accept which is important, but rather the native resolution of the
projector. The higher the native resolution of the projector the greater
the colour quality, or should I say color density of the projected
image.
Digital Projectors - Lumens
Lumens refer to the
brightness of the projected image. Simply put the higher the lumens the
brighter the projection. Brightness ratings, measured in lumens, are
typically lower for home theatre models than for office models. Room
size and screen size/distance will also affect the need for more or less
lumens. A projector may have a great Lumens rating, but if the contrast
ratio is low, you image will look washed out. For low-ambient or true
lights-out productions, you may find that a 1000 to 1500 lumens rating
is sufficient. If you need a very bright projector (3000 lumens or
more), an LCD projector is probably your best choice. The lowest lumen
projectors today start at about 700 lumens and go up to a jaw-dropping
15,000 lumens. A good rule of thumb is that it is always better to err
on the side of too many lumens than too few.
Digital Projectors - Throw Distance
Throw
distance refers to the maximum distance your digital projector can be
positioned away from the screen before image resolution, luminosity and
therefore image quality are affected. The greater the throw distance,
the larger the size of the projected image on the screen. Digital
projector throw distance is an important key feature if you are planning
to use the projector in a large room or outdoor environment, however
for the home user today's basic digital projector has more than
sufficient throw distance to meet the needs of your home movie theatre.
Digital Projectors - Aspect Ratio
Aspect
ratio refers to the ratio between the width and height of the projected
image. There are three standard aspect ratios settings that you should
ensure your digital projector projects these are: 1:1, 4:3 and 16:9.
Having a digital projector which has aspect ratio options are important
as different media are delivered in different aspect ratios. For example
standard video is delivered with an aspect ratio of (4:3), while HDTV
uses a (16:9) format. If your digital projector had a locked aspect
ratio of (4:3) you would not be able to experience in full, the visual
experience of wide screen movies or images. With more and more digital
media including cable and online TV networks adopting the (16:9) format
this is something to definitely check.
Display Features - fixed keystone correction and lens shift functions
To
ensure you can maximize the quality of the digitally projected image on
your presentation screen ensure that the digital projector has fixed
keystone correction and a lens shift function. Fixed keystone correction
shoots the image higher than the lens so the projector itself doesn't
block the viewers line of sight. Similarly the lens shift function
allows you to shift the image up and down and left and right. A handy
tool for making fine-tuning the position of your projected image on the
screen.
If you are considering buying a digital projector
remember the key features to look for are high native resolution, high
luminosity and a suitable throw distance for the environment you intend
to use the projector in.
For more helpful advice about choosing
the right digital projector for your needs or for more information about
digital projector lamps and accessories click here
[http://www.digitalprojector.com.au]
Chris Hopkins is an event
specialist with several years experience using digital projectors both
in the commercial environment for seminars, conferences and concerts and
in the home for personal viewing pleasure.
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