High Definition TV

LCD HDTV Televisions and Displays Explained
Bill Ransom

LCD displays have been around for years in everything from cell phone screens to computer displays. Like a plasma display they are made of two pieces of glass-like material with liquid crystals sandwiched in between the pieces of polarized glass. LCD displays are often called trans missive displays because the liquid crystals do not actually create the light needed to display the images but actually control the light and the amount of light coming from the display. Basically the display works on the principal of blocking light emission. Depending on the amount of voltage placed through liquid crystal they can control the amount of light that passes through the liquid. The liquid crystal cannot create their own light so an external light source is necessary and this is in the form of a special fluorescent light bulb. This bulb placed behind the LCD panel and the light from the bulb is diffused by a white diffusion panel so that the amount of light emitted onto the LCD is uniform. The liquid crystals will control the amount of light that passes through the glass panels and the inner working of pixels and sub pixels to form images and control color. The LCD pixels act like tiny shutters that either open or close to let light in or to block the light..

LCD displays can be made very thin. Since no phosphors are burned like in traditional CRT television and Plasma displays and the liquid crystals do not produce the light but rely on a back light; no radiation is emitted from the screen. Plasma and CRT screens emit low levels of radiation. Another plus side to not having to burn off phosphors to produce images LCD televisions use less electricity than Plasma's and CRT's do.

Viewing angles used to be an issue with LCD displays. The early LCD display where originally designed to be computer monitors thus meant to be viewed straight on. Recent improvements have given the newer LCD's better viewing angles than most Plasma's measuring in a 170 degrees on the high end models.

PRO'S

Very thin displays can be made. Makes LCD television a great space saver.

Very little electricity is used when compared to Plasma and CRT televisions.

Sharp images can be produced

Life span is longer than plasma. Some displays are rated up to 80,000 viewing hours by the maufacturer's

Back light bulbs can be replaced in some screens

Do not suffer from image burn-in

Can double as computer displays.

CON'S

More expensive than Plasma and rear-projection per square viewing inch

Screen sizes aren't up to Plasma displays yet (current sizes range from 10 to 45)

Colors are not as vibrant as plasma displays and blacks and grays are not as deep and well defined as on a Plasma television.

Motion trails (pixelation) with moving images

Viewing angles are reduced at about 20 degrees off center. Note that this problem has been fixed on many of the newer displays.

Choose The Right HDTV Antenna For Your Set-Up

Choosing an HDTV antenna can be a frustrating business.

However, if you prefer to receive HDTV through an antenna, rather than a satellite or cable subscription, there are a couple of things that will make life easier.

First of all, if you can, you should opt for a roof or attic mounted HDTV antenna.

This will give you the best chance of picking up a good signal and is a must if you are in an area where signal strength is poor.

Such as where you live some distance away from the nearest transmitter or where your signal is affected by hills or other environmental factors.

If an external HDTV antenna is not an option, perhaps because you live in an apartment or in a building of historic interest, then you`ll have to go for an internal, set-top antenna.

Unfortunately, every HDTV antenna is not alike and the quality of your picture can vary greatly depending on which antenna you choose. So how do you know which one to go for?

Perhaps the best way is to find out from people who already has an internal HDTV antenna, how it works for them. The best way is to talk to people you know - particularly those in the same apartment block. Failing that, user reviews on the Web are a good source.

Amazon sells a number of antennae for HDTV and user opinion on them varies greatly. For example, the Terk HDTVi Indoor VHF/ UHF HDTV Antenna gets slated by users, while this Gemini ZHDTV1 HDTV-UHF Digital Indoor Antenna, which is actually cheaper than the Terk, gets great reviews.

As with any item of electronics, the key is to do your research.

Find out as much as you can about the HDTV signal in your area, and if possible speak to people locally who are receiving HDTV via an antenna, before you buy.

Kenny Hemphill is the editor and publisher of The HDTV Tuner (http://www.the-hdtv-tuner.com (http://www.the-hdtv-tuner. com)).

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Sony Remanufactured 60" Grand WEGA 3LCD Projection HDTV $2000 Buy.com has the Sony Remanufactured KDF-60XS955 60" Grand WEGA 3LCD Projection HDTV at $2000 with free shipping. 16:9 Aspect Ratio; native resolution of 1386 x 788; Jul 16, LCD TV Applications: New Advancements in LCD panel Technology LCD HDTV sets are coming out bigger, sharper, faster and cheaper. In this article, we discuss the latest developments brought about by major LCD panel manufactures in LCD television applications. TV Alphabet Soup - Learn More About LCD, Plasma, DLP and HDTV Because of advancements in science and technology, there has been a revolution in the world of television as well. This article is going to focus on the new world of television and get into brief details of LCD, Plasma, DLP and how they relate to the HDTV. Read on to find out more ... Sharp unveils LCD with 4x the resolution of HDTV I hate to break it to you, but your HDTV is slowly but surely falling off the cutting edge. Yeah, when you bought it you must have thought it... Sharp LCD TV has 4 Times the Resolution of HDTV If we think of the world of HDTV as a prison Sharp just took the previous king of HDTV land and slapped it around, dressed it up in a pink tutu and made it say "please sir may I have some more". In other words ...Comment 37" LCD HDTV for $697 from Fry's Outpost The Emprex 37 inch LCD TV is fully HDTV compatible with support for 480p, 720p and 1080i digital HDTV signals. It's an Emprex brand. I've never heard of it. You get what you pay for.

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