Glosario de términos
Term
Description
Long Throw
A long throw lens allows greater distance between the projector and
Lens
the screen while being able to maintain the image size and brightness
of a shorter throw lens for any given projector. Depending on the
room, a long throw lens may be required due to mounting constraints
nearer the projected image.
Lumen
A measurement unit of total illumination. Typically a 100-watt light
bulb outputs 1700 lumens over a wide area. Projector light output is
measured in ANSI lumens. A projector with a higher lumen number will
produce a brighter image for a given image size. See ANSI Lumens
Luminance
The black and white part of a video signal. It is signified by the
letter Y. Signals with a separated luminance and colour signal avoid
interference. This interference can result in dot crawl among other
image artifacts.
Lux
A standard for measuring light equal to the amount of visible light per
square meter incident on a surface. 1 lux = 1 lumen/square meter or
0.093 foot-candles.
M1-DA
A DVI connector that supports analog, digital video, a USB connection,
and FireWire (IEEE1394). Used primarily with InFocus projectors.
M1-DA (EVC or P&D) is 3 rows or 10 pins and looks a lot like
the DVI-I except for 6 more pins. The maximum video resolution
supported is 1280x1024.
Maximum Distance
Sometimes used to refer to the distance from the screen that
a projector can focus the image. Most of the time, it is the
manufacturer's opinion of how far from a screen the projector can be
to cast an image that is useable (bright enough) in a fully darkened
room. Consult the Projection Calculator for guidance on proper
placement of a projector for a given screen and content.
Maximum
The largest image a projector can reasonable throw in a darkened
Image Size
room. Consult the Projection Calculator for guidance on proper
placement of a projector for a given screen and content.
Maximum
Maximum Resolution refers to the highest resolution that a given
Resolution
display device can support. If the Maximum Resolution exceeds
the Native Resolution, the image is usually scaled to match or
approximate the Native Resolution of the projector. Some display
devices allow pan and scan where rather than scaling the image, the
display devices allows you to use the native resolution of the display
to view portions of the higher resolution image. Scaling reduces the
image resolution and produces some artifacts in the image that are
more apparent when viewing text than graphics or video.
Memory Card A feature on some projectors that allows photos, documents and/
or presentation material to be projected using a memory card and
thereby eliminating the need of a computer.
www.infocus.com
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