Re: LCD projection panels
Barbara Armenta (BARMENTA@PIMACC.PIMA.EDU)
Sat, 21 Sep 1996 11:49:27 -0700
I agree with William. We have 2 LCD panels in two math classrooms. We've
been using them for 2 or 3 years ... they have started to "wear out".
Streaking in the screens etc. But the biggest $ outlay that we didn't count
on is the overheads. The true color screens require an overhead with a
mimimum of 3000 lumens. That puts the overhead in the expensive category.
We are debating on buying a third LCD panel or to go to a projection system.
In the classroom we also had to rewire the lighting. Our lights can now be
controled in rows. We can turn off a row of lights or two rows of lights.
Turning off all the lights in the room isn't advisable.
A side note. If you have regular chalk boards in the room. (ours
had half white boards and half regular chalk boards) The chalk that flys
around the room can really damamge the LCD panels. We had our panel on one
side of the room and the regular chalk board on the other. After one year
of classroom usage. The fan in the LCD was caked with chalk dust...so much
so that we almost burnt out the motor on the fan.
Has anyone used a projection system. Does it project the image well
in a semi-light room? Any comments or experience on the projection systems
as well as panels would be appreciated. When I go into the class on Monday,
I'll get the name of the panels that we use. They have worked ok...except
for the lighting requirements - 3000 lumens is the MINIMUM...more is better.
Barbara C. Armenta
Pima Community College - East Campus
Tucson, AZ