Difference Between Plasma and LED TV

Home Computers & Technology
By: Naveen Verghese Email Article
Word Count: 1268 Digg it | Del.icio.us it | Google it | StumbleUpon it



In terms of shopping for a High Definition Television [HDTV], shoppers ask themselves an indispensable question! Should I go for a Plasma TV or perhaps an LED TV? What's the difference between plasma and led? What's the technological difference between plasma and led? In case you are one of them, then, yes, you are well on a suitable page. Today, I'll explain all about it.

Plasma TV

Plasma TVs make use of a plasma display panel [PDP], which is a flat screen TV. It’s usually used on big screen TVs. Behind the flat screen of your plasma TV; you can find countless tiny dots, technically called pixels or cells. Each and every single cell has three sub cells within it, one sub cell is treated with phosphor that glows red when photons strike, the other is coated with phosphor that glows green when photons strike, and the last is coated with phosphor that shines blue. These cells have a combination of xenon and neon gases that has a very small amount of mercury in it. When a power charge is directed to the cells, the gas inside each cell forms plasma. While electric current flows through each cell, the loose electrons moving throughout the plasma, collides with all the mercury molecules. This collision greatly spikes the energy of the molecules and the excess energy is diffused as ultraviolet photon. The phosphor coating inside the cells, when struck by the photons creates assorted wavelengths of light. The color produced depends on the phosphor type coated inside the cells. The cells we talked above are generally a teeny-weeny neon lamp, containing the gases and phosphor coatings. Depending on video signal coming into the TV, these several colors orchestrate that creates the all-embracing color of the cells and thereby form the whole colorful images on your screen.

Referring to the resolution, the plasma TVs today, usually consists of a typical native resolution of 1080p. Plasma TV resolution is not an important factor towards the overall picture quality when compared to additional factors like contrast ratio. The very best three important factors that govern the image quality is contrast ratio, color saturation and color accuracy.

Here area some of the pros and cons of Plasma TV:

Pros

? Produces deeper blacks and hence excellent contrast ratio. Contrast ratio is the difference between illuminated and darkest portions pertaining to an image. Higher the contrast ratio, sharper the picture

? High refresh rates and as such less motion blur. Refresh rate is the frequency in one second that the display draws the data/image. Motion blur is when showing moving images, the television has to draw images in pixels, so quickly that the human eye cannot detect. In case the refresh rates are less, a moving image will cause a blur

? Viewing angle is much more wider than LCD. In LCD, in case you view one of your favorite programs or shows from an angle, the photograph degrades

Cons

? Screen burn. There are technological advancements to decrease screen burns but still don’t prevent it. Whenever a non-moving image or text is displayed for a prolonged time, it can result in permanent ghost-like image of these images or text

? Power consumption is significantly more than LCD or LED

? Might lead to buzzing noise when used at high altitudes; this is due to of the pressure difference involving the gases inside the cells and air pressure at high altitudes.

LED TV

Light emitting diodes [LED] are illuminated by way of the free movement of electrons via a semiconductor. LED is a semiconductor. Semiconductor means, a substance, which can have a fluctuating capability to conduct electricity. The material used to construct LED is aluminum-gallium-arsenide.
LED TV is, as a matter of fact just an LCD TV, which uses light emitting diodes [LED] as the source of light to light up the screen, unlike LCD TVs, which use Cold Cathode Fluorescent Lamps [CCFL]. An LED is essentially a teeny-weeny lamp. Unlike the regular lamps, it doesn’t possess a filament to burn out. LEDs have got a really durable life span compared with a regular lamp or fluorescent lamps. This is among the many main differences between Plasma and LED TV.

LEDs may well be laid in numerous configurations behind an LCD screen and uses either white LEDs or RGB [Red, Green, Blue].

Full Array LED TV. [With local dimming]

In this configuration, full array of LEDs is arranged behind the entire screen. Certain zones of LED at the rear of screen can be locally dimmed or brightened. Therefore if the picture on the TV demands certain areas to be dark and other spots bright, the LEDs will be dimmed in dark fields of the image and brightened in brighter regions the picture. This results in an enhanced contrast ratio, and hence sharper picture. Two kinds of LEDs are employed in full array, White and RGB [Red, Green, Blue]. TVs with RGB LEDs are capable of a far better color range.

Pros

? Can produce deeper blacks and therefore higher contrast ratio and sharper picture than Edge-lit models. Contrast ratio is the distinction between illuminated and darkest portions of an image. Higher the contrast ratio, sharper the picture.

Cons

? Slightly thicker than Edge-lit LED TVs

Edge-Lit LED TV. [With local dimming]

A very few hand select models are available in this model from Sony, Samsung and LG. Edge-Lit LED TVs have LEDs arranged down the four sides of the TV, in contrast to the complete screen. A special light guide is made use of to spread the light uniformly across the screen. While in this model, local dimming is possible in certain areas of your screen without placing LEDs behind the screen. Picture is sharper as opposed to the Edge-lit model without local dimming but is not same with full array models.

Pros

? Can produce deeper blacks and achieve higher contrast ratio than Edge-Lit models without local dimming. Contrast ratio is the difference between the illuminated and darkest portions associated with the image. Higher the contrast ratio, sharper the image

? Thinner profile than full array model

Cons

? Picture isn't as sharp as full array models.

Edge-Lit LED TV. [Without local dimming]

This model is same as Edge-Lit with local dimming except that local dimming will not be a possibility.

Pros

? Thinner design than full array models.

? Weighs lower than full array models.

Cons

? Contrast ratio is not so good as full array, because local dimming is not possible. Contrast ratio is the distinction involving the illuminated and darkest portions associated with the image. Higher the contrast ratio, sharper the image

? Lighting may not be uniform across screen
In this article, we described the difference between Plasma and LED TV, the substances utilized in construction of each and every and the advantages and disadvantages. Hope the details offered can help as part of your HDTV shopping.

For more information the difference between Plasma and LED TV, make sure and follow the link in the resource box below..
Related reading:Effio-P CCTV Cameras pomp double jet hand dryer Isolator Polarization Beam Combiner/Splitter