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Knocked Flat with the new HDTV Screens

Many HDTV screens are now available in a flat construction, making them much thinner, more lightweight and have the added advantage of taking up less space. Often a flat screen television (also referred to as a flat-panel TV) can easily be mounted on a wall of your choice. Flat screen televisions present very bright, clear images and are made by way of either plasma or LCD (Liquid Crystal Display).

The technology used to develop a plasma television centers around the idea of something very simple, that of a fluorescent light bulb. Cells make up the display of the plasma TV and within each cell there are two panels made of glass, which are themselves separated by a narrow gap. It is by way of this gap that a gas known as neon-xenon is injected and then afterwards sealed in plasma form. During the process of manufacturing when the plasma is in use, the gas is then electrically charged at specifically timed intervals. Precision and timing is an extremely vital part of the entire process. The charged gas in the television comes into contact with three different colored phosphors (blue, red and green) and it is this action that produces the television image we see when we look at the screen. Every group of blue, red and green phosphors forms the picture element or to use the more technological term, a pixel.

LCD (Liquid Crystal Display) is not a new technology by any means. For many years it has been used to make digital watches, calculators, cell phones, computer monitors and camcorders. The panels used in an LCD device (which is also referred to as a cell) are constructed with two layers of a fine material very much resembling glass. This material is known as substrates. The layers are polarized and then affixed together (sandwiched). A special polymer is used to cover one of the layers, but not both, and it is this layer that is responsible for holding the liquid crystals (or rod-shaped molecules) together that make up the LCD television set. What then proceeds to take place is that currents of electricity make their way through the individual crystals and it is the crystals alone that allow light to either pass through or block the image that the television puts forth. A light source external to the crystals is imperative for a LCD monitor to work properly as the crystals are not capable of making their own light source. This where the LCD and plasma televisions are similar, a fluorescent bulb is also needed to allow the television watcher to see the picture on the screen.

Flat-panel HDTV screens have many advantages which include the construction of these sets being shallow, deep and incredibly lightweight; both plasma and LCD televisions have digital display precision; both HDTV types have immunity to picture distortion of the magnetic kind and finally perfectly flat screens equal perfect focusing of images and geometry.

Flat-panel HDTV screens allow an individual many options in where to place the sets as these kind are more "user and mover friendly" because they are shallow television sets with lots of depth and are very lightweight. In order to conserve space many people choose to mount their HDTV flat-panel screen on a wall while others choose to place it on an entertainment center, table, cabinet, bookshelf or bureau. Plasma televisions do weigh slightly more than LCD screens but it's nothing compared to the heaviness of a traditional picture tube (or CRT) set.

Both LCD as well as plasma televisions are what are classed as digital displays. What that means is that images are generated by the illumination of a fixed grid of small sized pixels. Every pixel is divided into three sub-pixels each one consisting of the colors green, red and blue. It is at the sub-pixel level of the television that the precision side of things takes over. Both the color and brightness of the screen is controlled very precisely at this unique level, giving rise to millions (and some estimate even billions) of color combinations.

Have you ever positioned a speaker at a distance too close for comfort to your conventional television and took notice of the fact that a particular area of the screen had become discolored and kind of strange? Well that phenomenon is known as magnetic distortion and thankfully with the advance in technology both LCD and plasma televisions are not affected whatsoever by the close proximity of magnets that exist inside a loudspeaker.

Finally, a perfectly flat HDTV screen means so much more than that. Flat screen televisions have an image focus that is right on and as perfect as is technologically possible for them to be. As well the geometry of these sets, looking at them from top to bottom also from side to side and lastly, corner to corner is perfect. Straight lines are meant to look stick straight and they do indeed on these flat HDTV screens.

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