Liquid crystal on silicon (LCOS or
LCoS) is a "micro-projection" or "micro-display"
technology used in projections. It is a reflective technology
similar to DLP projectors, however, it uses liquid crystals instead
of individual mirrors which are arranged in a grid in front of
the refelective silcon grid. The silicon grid masks the electronics
which manipulate the liquid crystal in front of it thereby making
each pixel reflective (open) or not (masked). In this way the
image is built up pixel by pixel. The adavantage of LCOS over
DLP & LCD is that as the electronics are masked by the chip
itself, the pixels can be closer together which reduces the "barndoor
effect" most easily seen when LCD projectors are used to
project a large image.
LCOS technology can produce much higher
resolution images using highly advanced silicon technology than
liquid crystal display and dlp display technologies, although
it is more expensive at this point in time..
Introducing Colour into the Equation:
There are two broad categories of projection colour systems
which are common to LCD, DLP & LCOS: three-panel and single-panel.
Three panel systems have one display chip per color, and the
images are combined optically to create a full colour image.
In single-panel designs, one display chip (using a colour wheel
or LED array) shows the red, green, and blue components in very
quick succession which are then interpreted by then interperted
by the brain as a full colour image.
REAL LIFE USAGE
LCOS projectors offer far superior image quality & colour
rendering when compared to DLP & LCD projectors. This is
the technology of choice where image quality is required. It
is more expensive at this time but it may well develop into
the leading projection technology over time.
We'll be happy to hire, demonstrate or sell
this unit. Please call or email for current purchase price. Current hire prices are shown below.
For more info on the Canon XEED SX50
Projector click here
