Are you going to buy a brand new flat screen High Definition Television? Yes? Congratulations! But, have you found out every important thing to know about HD TVs before buying one? Or better, have you even thought above bigger screens and more pixels? There is more to know about an HDTV than greater inches and more pixels before buying one. Do not worry, in this article we shall give you some fine tips which are bound to help you when you go out shopping for an HDTV.
You will find two options in flat screen HD TVs; LCD and Plasma. If you are going for a TV having less than 37” screen, you have no choice but an LCD. But if you plan for something bigger and greater than 37”, you can choose between Plasma and LCD; comparing their respective features and attributes.
Plasma is expensive; this is the biggest fact about it. It is a plane and flat panel display, used for huge screens mostly. These displays are brighter and more vivid than LCD displays due to difference of working and substances used in them.
There are two plates of glass used in Plasma’s working which hold countless minute cells inside. These cells are full of two gases; neon and xenon. Between the glass-plates on both sides of these tiny cells, there are placed long electrodes. A potential difference is caused by charging these electrodes. When a difference in voltage happens, ionization of neon and xenon occurs and creates plasma. These ions start moving towards the electrodes resulting in collisions, which give birth to photons.
The pixels of Plasma display consist of three sub pixel cells which are red, blue and green colored phosphors. Variation in the current which flows through these phosphors increases or decreases the concentration of these colors. This is the rationale behind rich color display of Plasma TV. Plasma range begins from 37” and extends to 65”, costing about $800 to $15000.
- Plasma Displays are prone to burn-ins.
- It consumes way more power than LCD.
- It is pricier than LCD.
Liquid crystal display consists of two glass-plates holding inside them an arrangement of liquid crystals. Two glass-plates hold thousands of pixels filled with liquid crystals, and there is a source of light at the back. There are two transparent electrodes and two polarizing filters also; between them is present a layer of molecules. Liquid crystal molecules are lined up in a certain direction before an electric charge is applied to them. When an electric charge is applied, variation results in construction of different levels of grey.
Same three colored sub pixels are present in LCD too. Colors are subtracted from white light and thus, color elements are displayed. LCD models vary in size, starting from 15” to 65”. It is not a very expensive choice, yet it is a nice one.
- It is beaten by Plasma when it comes to contrast ratio, color accuracy, and deeper blacks.
- It can not produce pictures as large and bright as Plasma.
- Sometimes, moving objects are smudged in LCD.
- Single pixels of LCD can burn out, which we see as black spots.
Now when you have the plus and minus points of both technologies, you can decide according to your own choice that what you should bring in to your home.
It refers to the brightest and darkest light values that a display can generate at a time. The higher the contrast ratio is, the better the TV’s quality is. LCD has a low quality contrast ratio (starting at about 600:1) as compared to Plasma, which offers very high contrast ratio (starting at about 1000:1). Unfortunately, there is no authentic method to identify a TV’s contrast ratio. Plasma offers deeper blacks than LCD.
It is the relationship of screen’s width to screen’s height. Usual TV sets have an aspect ratio of 4:3, and the modern wide screen ones have an aspect ratio of 16:9. You should go for the wide screen TVs because HDTV is a wide screen system and also, DVDs look way better on wide screens.
It determines that what kind of and how many sources you can use with your TV. The most widely compatible is the Composite Video, though it has the lowest quality. It is present in every device that has video output sources. S-video offers better than Composite quality, and is present in all devices else than the standard VCRs. Component video is the minimum standard for connecting HD cable, satellite set top boxes, and progressive scan DVD and Blu-ray Disc players. VGA is primarily used for computer connections. DVI is one of the highest quality inputs that can connect to devices with HDMI outputs and computers. Today, the dominant digital connection interface for HDTVs is HDMI, which is a DVI plus input.
Apparent picture details are determined through resolution and contrast ratio. Plasma and LCD have fixed pixel display. Basically, there are five types of resolutions used these days; 480i, 480p, 720p, 1080i, and 1080p. 480i is used for analog standard TV; 480p for DVDs; 720p and 1080i formats are used by satellite, cable, and over-the-air-broadcast HD content providers, plus some advanced DVD players; and 1080p is used for Blu-ray players. List down your priorities, and choose one. But we would advise you to invest in a model that supports 1080p, as your Flat Screen HD TV is a long term investment.
- Get a TV set with at least some HDMI inputs; the next era is of multi-connectivity. Look into for those which have more side and front ports and rear.
- Compare different TV displays using various input sources, mark the difference, and make your decision.
- Take with you a DVD with dim-lit scenes, and check the displays with the DVD. Look into the displays that show deeper black.
- Very important: try to check the remote control before buying a TV. A non friendly complex remote can destroy your state of sheer joy.
- Check the video settings before buying a TV.
Now that you are well equipped with pre-shopping knowledge; you must be confident to head towards the shopping area of your city, inspect all those trendy HDTVs like an expert, and buy the one that suits you best.
Written by “Seemab”