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CRT Primer
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Updated: April 2006 |
Specific CRT Projector Information
The following is a summary of features
and problems with specific CRT models as
I have experienced them. The main four
projector brands that I sell and that
are on the market in general are Barco,
Sony, NEC and Electrohome. Other brands
are Zenith, Ampro, Seleco, Vidikron,
Runco, GE, Knoll and Kloss. I will
detail the less popular models at the
end of this section.
 Electrohome ACON camera
Automatic convergence
Several manufacturers (Electrohome,
Barco and NEC) offered an option that
automatically converges the blue and red
tubes to the green, thus speeding up the
set up time of a projector.
Electrohome
called their option ACON, whereas Barco
called theirs the IRIS, and NEC calls theirs
ACAT.
The option consists of a small
camera mounted on the front of the
projector, that sees the test pattern
image, and automatically adjusts the
electronic convergence parameters for
you.
This is useful if you do not want
to learn how to converge yourself, but
in my opinion while the camera units
work well, you can always do a better
job of converging manually.
The autoconvergence option was considered more useful back when CRT
projectors were moved around for road shows and the like and had to be set up in
only 5-10 minutes. An ACON,
IRIS or ACAT usually adds at least
$300.00 USD to the price of a used
projector and were $1500 to $2500 when
new.
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