LCD (Liquid Crystal Display) projectors are the most widely used in the world of multimedia, due firstly to their excellent colours in computer usage and secondly to their competitive price.
LCD projectors are equipped with three LCD panels which correspond to the three primary colours, blue, green and red. These three basic components provide more than 16 million colours. The contrast ratio is no higher than 1000 : 1 which is largely sufficient for traditional video and computer applications.
The real graphic resolution of the LCD projectors is between 640x480 pixels and 1920x1200 pixels. The most widely used resolution is the XGA (1024x768 pixels) which also allows for the projection of higher resolutions (1280x1024, 1400x1050, 1600x1200, 1920x1080, 1920x1200, etc) in compressed mode. XGA resolution is also the most widely sold and offers the best value for money.
The sizes of pictures projected depends mainly on the power and the resolution of the device. Normally the pictures are between 1.5 and 20 metres (diagonal) in 4/3 or 16/9 format.