What’s the difference between an overhead projector and an LCD projector?

23Nov2007 Filed under: Overhead Projectors Author: admin

Blue Crush asked:

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3 Responses to “What’s the difference between an overhead projector and an LCD projector?”

rootsradicalz
November 26th, 2007 at 10:30 am

Overhead projectors refer to an old way of throwing an image onto a screen. It’s the thing where you put a transparency on a piece of glass with a light under it. The image shoots straight up into an arm unit that bounces the image off a mirror and puts it on a wall or screen. In high school that’s what all my teachers used.

When I was in college they used lcd projectors and a computer. These hook up to computers and project whatever the screen is. In my case, that was powerpoint presentations.

Hope this helps. Here’s wiki’s if you want more.
Tom P
November 26th, 2007 at 11:37 pm

Well technically, they can be the same thing. When we speak of projectors (in this case for movie or TV watching in a home theater environment), there are several different types of projectors. The two most popular today are: LCD or Liquid Crystal Display, DLP or Digital Light Processing. The difference between the two types is how they produce the image that you see on the screen. You’ll have to do your own research to find out which one is better than the other because today it boils down to personal preference and how much money you want to spend.

Overhead Projector is simply a way of describing how the projector is mounted. In this case, the projector is mounted overhead - usually attached to the ceiling using a mount or sitting on a shelf somewhere near the back of the room. The same projector could also be placed on a tabletop to project the image and most current projectors can be placed behind the screen and still project the image by chaning a few settings in the main menu. Hope this helps.
VicSEO
November 28th, 2007 at 1:49 am

I agree with other forum members that the word “overhead” may refer to the positioning or mounting of a projector and that LCD is a technology which is currently in competition with DLP technology — both technologies often used in front projectors.

Good luck!