Home > Frequently Asked Questions > What is the difference between an overhead projector and a video projector ?
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What is the difference between an overhead projector and a video projector ?
Both have been conceived for the projection of images, but the former projects a fixed image, whereas the latter projects videos. They thus use two very different technologies. The videoprojector uses advanced technologies as DLP, LCD or CRT.
The overhead projector uses either of the following technologies; the episcope technology which projects an enlarged image of an opaque object (books etc), or the diascope technology which is used to display transparencies.
Another difference is the required lamp: an overhead projector lamp is an incandescent light bulb which is much cheaper than a video projector replacement lamp.
The huge price difference comes from the fact that an incandescent bulb is rather simple and easier to produce than a video projector lamp.
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