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Installation should be looked at before buying a projector. It can be as easy as positioning a projector on a table or bookcase and connecting to your laptop. If you require your projector to be ceiling mounted you will need to run power and video cables or connect via your wifi. Current projectors are designed for easy installation. Lenses can now cover a wide range, from ultra-short to long throw with optional lenses. Call and we can guide you.
You need to consider, what will connect to the projector, structural supports to mount the projector, and any obsticals between the screen and the projector. Basic stuff.
Most projectors give you four positioning options:
Front - Simplest of all installations, only requires power connection and signal connection.
Image size can be adjusted by simply repositioning the projector and altering the zoom lens
(when available). This can also help in reducing the length of the video cable improving
signal quality and eliminating the cost of expensive cabling.
Ceiling - Fixed installation, requires image inversion, cabling for Video and power to
ceiling and a ceiling mount. Before fixing you will need to calculate the required throw distance
for your desired image size and the image offset (See Below). Please note that ceiling mounting
in hot climates can reduce the effectiveness your projectors cooling system and may lead to lamp
failure. Note: See your projector manual for instructions on inverting your image.
Rear - Offers the same easy installation as front but requiring horizontal image inversion
and a rear projection screen.
Rear Ceiling - Requirements are the same as both Ceiling and rear.
Idealy you would place the projector horizontally in line with the center of the screen, level to the top or bottom of the screen. If you need to position your projector to the left, right, above or below the screen. Your image may suffer distortion of the image dimensions - Keystoning.
Keystone Correction
In this situation it is preferable to use Lens shift over Keystone correction. Keystone correction is also referred to as 3D-reform and Side-shot. Most projectors don't have lens shift. Talk to sales if you need it.
Most projectors have vertical Keystone Correction to correct problems "C and D" above, only some come with Horizontal Keystone Correction which allows positioning of the projector to the left or right of the screen. Horizontal tends to have a lower angle adjustment than vertical correction.
Cornerstone Correction
When you look at the specifications for projector, Keystone correction is normally quoted as an angle. This is the largest angle that the projector can square the image for.
Throw Ratio is the ratio of Throw distance over Screen width. This ratio allows you to calculate the image size at any given
distance or the throw distance for any given screen size.
Image Offset, quoted as a percentage, is the height of the image "H" divided by the distance that the
image is projected above the horizontal line from the lens "C".
This should be considered when calculating the position of your screen especially for ceiling mounting as it reduces
the need to use extendable ceiling brackets to lower your projector. note: projectors with Lens Shift do not
have a quoted offset)
