A number of devices and software can be used for presentation purposes. A data projector is a device that projects an image onto a screen for presentation applications.
A data projector is a projection device that takes a signal output by a computer and projects an image onto a projector screen via a lens system. Data projectors can be used in such applications as home theater, conference room presentations and classroom training.
Display resolutions, or the number of pixels displayed in an image, for a data projector range from 1280x720 pixels to 1920x1080 pixels. Extended graphics array (XGA) projectors offer standard resolutions of 1024x768 pixels, while super video graphics array (SVGA) projectors include resolutions of 800x600 pixels.
Cathode ray tube (CRT) data projectors project light through red, green and blue colored tubes, and are heavier and larger than many other data projector systems. Liquid crystal display (LCD) data projectors utilize a lamp and prism system to project signals and are typically used for business and home theater purposes.
- old slide projector image by charles taylor from Fotolia.com