The Mechanism Of An Lcd Monitor - Sony LUMA Product Information Manual

The mechanism of an LCD monitor

Compared to CRT monitors, LCD monitors use an
entirely different mechanism for displaying
pictures. While the LCD device itself could be
viewed as playing a similar role to a CRT
phosphor, it actually works in a very different way.
CRT phosphors 'glow' or emit light while LCD
devices only control (or filter) the amount of light
that passes through them. The light source of an
LCD monitor is a fluorescent light placed behind
the LCD device. What the LCD device does, is
determine the amount of light that should be
directed to the face of the monitor.
LCD devices consist of a number of small pixels,
all of which operate in a similar way to a camera's
lens iris. For example, an XGA LCD has a pixel
array of 1024 x 768, or 1024 x 768 tiny irises*. By
applying the appropriate drive voltage according
to the input signal, these tiny irises either open or
Figure 2-6.
The basic mechanisms of display devices
close to reproduce the images that must be
displayed.
The LUMA Series monitors use wide aperture
LCDs, meaning that the widest opening (aperture)
for each pixel is very wide. This alone contributes
to effective use of the backlight source for the
reproduction of bright pictures.
While many systems place the light back along
the edges of the screen, the backlight of LUMA
monitors is placed right behind the LCD device -
another element making them so bright.
* In reality, LCDs use a liquid crystal substance,
sandwiched by two polarized panels to determine the
amount of light that passes through each pixel. Refer
'
to A deeper look into LCD's' (page 30) for more
information. The iris analogy is used for simplicity.
R G B
R G B
R G B
G B R
G B R
G B R
B R
B R G
B R G
R G B
R G B
R G B
Product Information Manual Sony Professional LCD Monitor
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