41
Antares-PJ1Training
Slide 41
LCD Projectors
LCD projectors appeared during the early 1990s, and are
now the main type of projector.
Three LCDs receive electrical signals from an image-
generating device. One receives signals for the red part of
the image, one the green, and one the blue. In this way,
each LCD holds a pattern of pixels.
Then, red light is shone through the LCD with the red part
of the image, and green and blue light are used for the
other two LCDs.
After passing through the LCD filters, the three beams are
combined and projected.
LCD projectors give bright, high-resolution output, and
they are easy to adjust. They are also cheap.
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