Choosing LCD Monitors:
When shopping around for an LCD monitor, its features,
more than it's appearance, should be your primary concern.
Do not be taken in by how good the LCD panel looks. To
ensure that the LCD screen is worth buying, you should
evaluate certain features carefully.
LCD Dead Pixels
LCD, Liquid Crystal Display or Liquid Crystal on
Silicon, has been around for some time. This technology
can be commonly found in popular HDTVs, computer
or laptop monitors and Sony's new PSP. But the downside
to LCD screens is the dreaded "dead pixel"
or "hot pixel" phenomenon.
What are LCD Dead Pixels?
Webopedia defines dead pixels or "hot pixels"
as "a pixel on an LCD monitor that remains
unlit, or black, when it should be activated and
displaying a color. Each pixel on an LCD screen
is made from three separate subpixels-one red, one
green and one blue-that when combined form the colors
that the users see on the monitor. A dead pixel
occurs when the transistor that activates the amount
of light that shows through all three subpixels
malfunctions and results in a permanently black
pixel. Dead pixels are rare and largely go unnoticed
by the user."
Certain amount of dead pixels is considered acceptable
by manufacturers. Sometimes, dead pixels don't occur
with normal use; these monitors were manufactured
poorly in the first place. However, dead pixels
can also appear as a result of abuse. If you don't
take care of your LCD screen, dead pixels are likely
Dead pixels are sometimes not covered by most manufacturers'
warranties. Hot pixels take time to emerge, even
if you LCD screen is brand new. If you are planning
to buy your new LCD TV or LCD screen, you should
study the store's Return and Exchange Policy to
ensure that the vendor will allow you to return
it if you are not satisfied or discover dead pixels
after purchasing the LCD panel. Ask them specifically
about a dead pixel. Since manufacturers give you
no leverage, you rely totally on your vendor's policy
in this matter.