Difference Between LCD and TFT by nagaria.keval

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Difference Between LCD and TFT

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									                                                        Keval.M.Nagaria


What is a TFT Monitor?
A TFT monitor uses thin-film transistor technology for the ultimate LCD display. LCD
monitors, also called flat panel displays, are replacing the old style cathode ray tubes
(CRTs) as the displays of choice. Nearly all LCD monitors today use TFT technology.

The benefit of a TFT monitor is a separate, tiny transistor for each pixel on the display.
Because each transistor is so small, the amount of charge needed to control it is also small.
This allows for very fast re-drawing of the display, as the image is re-painted or refreshed
several times per second.

Prior to TFT, passive matrix LCD displays could not keep up with fast moving images. A
mouse dragged across the screen, for example, from point A to point B, would disappear
between the two points. A TFT monitor can track the mouse, resulting in a display that can
be used for video, gaming and all forms of multimedia.

A typical 17-inch TFT monitor has about 1.3 million pixels and 1.3 million transistors. That
leaves a significant chance for a malfunctioning transistor or two on the panel. Upon
delivery, a TFT monitor can have "dead pixels" for this reason. A dead pixel is a pixel whose
transistor has failed, thereby creating no display image. On a solid black background, dead
pixels will stand out as tiny dots of red, white or blue. Most manufacturers will not replace
a TFT monitor that has less than 11 dead pixels. Often, a TFT monitor won't have any dead
pixels —- always the hope for any buyer, though dead pixels are not noticeable unless
located in a critical position on the screen.

There are only a handful of TFT factories that turn out panels for all brands of TFT
monitors. Since there is a given failure rate -- considering how many transistors are on
each panel -- only so many of the displays come out bearing no dead pixels, while a certain
percentage bear an acceptable number of dead pixels and other panels are unusable. The
panels that bear some dead pixels are often sold to be used in discount models. If looking
for a TFT monitor, it is a good idea to read feedback provided by buyers at popular online
retail sites. By scanning the reviews for several brands, it is easy to get a feel for which
models have consistently good panels that rarely bear dead pixels.

A TFT monitor delivers crisp text, vibrant colour and an improved response time for
multimedia applications. If interested in gaming, video editing or other multimedia
applications, look for a TFT monitor with a response rate of 16ms or less.




Fundamental of Computer Organization                                                  Page 1
                                                         Keval.M.Nagaria


What is the difference between and LCD and TFT monitor?
A liquid crystal display (commonly abbreviated LCD) is a thin, flat display device made up
of any number of colour or monochrome pixels arrayed in front of a light source or
reflector. It is prized by engineers because it uses very small amounts of electric power, and
is therefore suitable for use in battery-powered electronic devices.

TFT-LCD (Thin Film Transistor-Liquid Crystal Display) is a variant of Liquid Crystal Display
(LCD) which uses Thin-Film Transistor (TFT) technology to improve image quality. TFT
LCD is one type of active matrix LCD, though it is usually synonymous with LCD. It is used
in both flat panel displays and projectors. In computing, TFT monitors are rapidly
displacing competing CRT technology, and are commonly available in sizes from 12 to 30
inches. As of 2006, they have also made inroads on the television market



What is ThinkPad?
ThinkPad is a brand of portable laptop and notebook personal computers originally
designed, manufactured and sold by IBM. ...



What is plotter?
A device that draws pictures on paper based on commands from a computer. Plotters differ
from printers in that they draw lines using a pen. As a result, they can produce continuous
lines, whereas printers can only simulate lines by printing a closely spaced series of dots.
Multicolour plotters use different-colored pens to draw different colors.
In general, plotters are considerably more expensive than printers. They are used in
engineering applications where precision is mandatory.




Fundamental of Computer Organization                                                   Page 2

								
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