LED or LCD screen

Hi
I use a TV screen full HD 100 Hz to 32 or 37 inch screen as the PC via HDMI port. Is it better to choose a screen that is LED or LCD ? The question will soon arise out of the new range of TV screens samsung. One more thing the plasma screens are yet another technology?

Thank you in advance for your answers

An 'LED screen is a' LCD '.

LCD is the screen pixel.
LED or CCFL, the type of backlight behind the screen pixels.

Plasma is another technology.

Technologically speaking, the LED is much better on the quality of the image (contrass) and energy consumption has a backlight screen classic.
Apparently Samsung has finally developed LED technology.

Hey LED & CCFL are the option for LCDs
But in my opinion LED is better than CCFL Since I have noticed that LED-backlight screens use less power & expands the battery life & they are brighter than CCFL screens, Again they don't take time to worm up which is quite normal in CCFL technology LCDs (5-10mins) to reach full brightness.