Projectors are devices that use a light source to display images of video on a screen for the purpose of group viewing. Some of the earlier types of projection devices include slide projectors and overhead projectors. Their use has been in decline in recent years since they are only able to project still images. The invention of new technology has corrected this problem. Video projectors are often used for such applications as use in home theaters and for business presentations.
A slide projector is a mechanical device that displays still images either on a screen or wall. It is made up of four separate parts that allow images to be projected. A fan-cooled electric bulb is responsible for providing
...better black levels makes them ideal for people looking for a big-screen home-theater. Plasma TVs are not available below 37" screen size. Plasma TVs are either enhanced definition (EDTV) or high definition (HDTV). EDTV are cheaper and can display HDTV ...













