PRESENTATION

Topic:Lcd,led and plasma

Prepared By : Sudip Vora

Contrast ratioo A television's contrast ratio represents its ability to

show detail in high contrast areas of the screen, in the form of minute gradations of colour and blacks or whites.

o It is generally accepted that plasma televisions have better contrast ratios than LCD panels, due to the fact that a plasma television can completely deactivate the light source for individual segments of the screen. This means sections of the screen can be completely dark while others are displaying bright colour, unlike a traditional LCD screen which has a single backlight array that can only alter brightness levels for the entire screen.

To be continue…. The latest LED backlight technology allows

the television to individually control backlight segments. This technology allows for contrast ratios similar to those produced by plasma television panels.

Viewing angle plasmas have better viewing angles than

LCD and LED TVs, with their images remaining solid and colourful at wide viewing angles.

while LCDs suffer from colour shift and loss of brightness. This is not always the case.

LED televisions have superior viewing angles compared to LCDs due to their decentralised backlight distribution.

color Colour is an aspect that is largely independent

of the television's type, relying on the processing technology independent to each manufacturer and specific screen model.

it is important to note that plasma televisions can in theory produce brighter colours overall.

LED-lit televisions using either a white or RGB LED backlight also offer a larger colour gamut than traditional LCD screens, due to an improved brightness source.

Motion There is much discussion as to whether plasma or

LCD screens are better at handling fast motion. New LCD screens can now update the image

displayed 100 times per second

plasma TVs are still superior in handling fast motion, but the motion-handling of LCD TVs has improved greatly over the last five years.

LED televisions use the same motion processing technology as LCD panels, with all panels currently on the market using 100Hz refresh rates. As LED televisions are leading the market in technological innovations

Power Most LCD televisions require a single

fluorescent backlight to be lit. Plasma televisions, on the other hand, require

every sub-pixel to be lit in plasma individually. When you compare screens of equal size televisions consume more power than their LCD counterparts.

LED television screens offer significant power savings over both LCD and plasma televisions.

Energy-efficient backlighting allows LED televisions to have energy consumption of up to 40 percent less than LCD televisions and significantly less than a plasma.

Life span In the past, plasma panels suffered from a short

life-span before they lost significant amounts of bright- ness and image quality degraded. This has been overcome in recent plasma generations, their screens with a half-life of 60,000 hours.

The life of LCD tv depends on the life of its backlighting bulb. These bulbs are often rated to above 60,000 hours in regular fluorescent-lit LCD panels.

new LED-backlit televisions have expected lifespans of over 100,000 hours. It is important to note that the end of this lifespan does not necessarily mean the screen will stop working.

Price vs screen size More than any other determining factor, it is

tempting to simply pick the cheaper of either a plasma or LCD television when considering any given size.

Contrast and brightness shortcomings are less apparent in smaller screen sizes, while you will also generally find LCD screens below 42in have a higher resolution than their plasma equivalents.

considering a large screen — 42in and above — as your home theatre centrepiece, be sure to check out plasma technology.

To be continue..... Plasma panels do have the edge in terms of

contrast and overall picture quality at these sizes, and are often cheaper than an equally-sized LCD counterpart.

LED televisions are generally available in similar sizes to LCD televisions, with larger screens also available in premium models

LED televisions generally command a price 20 per cent above that of an LCD television featuring an identical screen size and similar specifications.

LED televisions’ power-saving advantages make

them attractive prospect for long-term use.

Thank you!