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Home > Types of Televisions > LCD Televisions  LCD Televisions
LCD TVs are one of the many different types of television that you can choose from when you are buying a new TV. On this page you can find out more about LCD televisions and how they work.
To help you decide whether an LCD TV is the right type of television for you, you’ll find more useful information including hints and tips on what to look for when choosing an LCD television on the following pages:
LCD TV - What are LCD Televisions?
LCD stands for liquid crystal diode and whereas traditional televisions use cathode ray tubes (CRT) to work, LCD televisions use liquid crystal technology.
How do LCD Televisions Work?
LCD TV screens consist of two polarising transparent panels with liquid crystal solution between them and a fluorescent bulb behind the rear pane.
When the backlight shines through the glass, the liquid crystals react. Depending on the strength of the light they will either twist or untwist, blocking the light or allowing it through.
The LCD screen is made up of tiny parts known as pixels. Turning the pixels off blocks the light from coming through, and turning them on allows it to pass through. It’s this that results in the display you’ll see on your LCD television screen.
There are two ways in which the pixels are controlled in LCD televisions. Some cheaper models use what’s known as passive matrix. This is cheaper to make as it uses a grid of conductors with pixels at the intersections and light for each pixel is controlled by sending a current through two conductors on the grid.
Other LCD televisions use what’s known as active matrix. These are also often called TFT (or Thin Film Technology) sets. These use transistors at each intersection to control the current being passed through the pixels.
Active matrix LCD TVs are more expensive to make (and buy) but they have advantages over passive matrix LCD televisions. In active matrix television sets, the current passing through the pixels can be switched on and off more frequently than in passive matrix LCD televisions and the screen refreshes more often. As a result, active matrix LCD televisions are less prone to the ghosting, blurry images and poor contrast that can sometimes affect passive matrix LCD televisions.
Further Information
You can learn more about the different models and brands of LCD TVs available in our Brands of Television section and on our Top Models of LCD Television page.
You can find out more about the types of accessory you can buy for your LCD television in our Accessories section.
If you want to buy an LCD television, go to our Where to Buy pages to find out about some great deals from online suppliers.
Direct TVs offer a wide range of Cheap LCD TVs. Choose from their range of latest new models and ex demonstration bargains.
If you aren’t sure whether or not an LCD television is the best option for you, visit our guide to How to Choose and Buy a Television for some hints and tips on what to look for or our Types of Television section for details what’s available.
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