Television - Understanding The Liquid Crystal
Display Technology
Author: Roberto Sedycias

The Televisions that use Liquid Crystal Display for an improved
image quality are termed as the LCD Televisions. This is one of
the latest inventions of technologies in TV and computer
monitors. LCD televisions are easy on the eye and the intensity
of strain to the eye balls is greatly reduced. Thus they make
prolonged viewing much more comfortable and stress free. In
common parlance it can be said that there is a liquid in the
screen and we see the image on the liquid screen.

Broadly, this modern technology uses thin film transistors to
monitor voltages to the individualized pixels. Here the
transistors constantly regulate voltage to three liquid crystal
sub pixels of red, green and blue, which in turn control light
dispersion through the wafer thin panel. But to be precise, LCD
technology is based on the utilization of specified polarized
light.

In this mechanism the pixels are actually the segregation of
thin liquid crystalline gels which get sandwiched by two
polarized panels. The separated pixels then get activated with
the activation and stimulation of X/Y grid, a bunch of wires
connected to them. The amount of voltage applied to the X/Y grid
is directly proportional to the darkening of the pixels which in
turn get polarized at 90 degrees, and thus to obtain a brighter
appearance relatively lower voltage should be applied to the
pixels and similarly for dark shadow area the pixels get a
higher voltage from the grid. Irrespective of the voltage
fluctuation a constant flow of charge keeps on passing through
the pixels even at the absolute dark LCD pixel.

The patterned vertical alignment or PVA and the super patterned
vertical alignment or the SPVA technology is an added advantage
of LCD televisions. The PVA and S-PVA offer a better and
improved dark depth, and a wide viewing angles up to 178 degrees
and S-PVA can offer additionally fast response times. An
upgraded and dynamic contrast ratio or the ratios between
brightest colors to that of the darkest shades are also
proficiently delivered by the PVA and S-PVA LCD panels which
offer a clear balanced and highly monitored display at any
intensity of light at the surrounding. Thus each and every pixel
emits consecutive lights to set intensity of the picture.

Today a number of companies are offering these manifold
offerings with LCD technology and are marketing world wide. The
prices vary with the manufacturer and so too the added features.
Such as, Samsung is offering a high contrast ratio nearly 3000:1
with value-oriented PVA panels. Their S-PVA panels do not apply
color simulation or replication methods instead they use true
electronics of 8-bit colors. Another new company Eizo uses even
10-bit colors and upgraded S-PVA panels.

With these entire multiple and diverse benefits the most
important caution against the usage of this liquid crystal
display suggested by the authorities must be followed by the
users. Such as, the liquid crystal inside the display are much
toxic and can be fatal at times if it comes at a close contact
with the skin or at any wounded area of the body part or even
with the clothes. It must not be ingested either. In case of
accident, if spills occur, the area should be cleaned with soap
and water immediately. However, there is a very low risk of such
an accident taking place and there is no need of panic. Only if
someone is totally irresponsible will he tear open the screen
and cause an accident!

It has been said that the improvement and advancement of LCD
technology has increased the customer expectancy towards the
quality resolution at a reasonable market price of this gadget
and a minimal power consumption at the same time.


About The Author: This article can also be accessed in
portuguese language from the Article section of page
http://www.polomercantil.com.br/televisores.php Roberto Sedycias
works as IT consultant for http://www.polomercantil.com.br