That NCIX video does not seem to be a good source of information after watching the first few moments.
First of all like mentioned the only difference between computer displays labeled as LED and traditional CCFL displays is the back light, both are still TFT-LCDs, in that liquid crystals are manipulated to display images by changing the light coming from the back light.
Read this for instance -
LCD Monitor Buyer?s Guide: Spring 2010 (page 3) - X-bit labs
and bear in mind that all current computer monitors are edge lit. The only way to get any real world image quality improvement from using LED back lighting is if a white or RGB array is used. These types are only present on large TVs at the moment.
Myths regarding LED backlit computer monitors -
LED back lights give a wider color gamut.
- false, there are even 10-bit LCD monitors capable of displaying 10 billion colors (such as
NEC PA241W Review). They use traditional CCFL back lights.
They offer better contrast
- Static contrast is not dependent on the back light used. LED screens are capable of better dynamic contrast only. Dynamic contrast is a highly misleading number in terms of real world usage. When searching for a monitor look at its static contrast rating.
Screens are more evenly lit
- Computer screens currently are all edge lit, and not lit by a full white LED array.
LED screens are brighter
- This is again not an inherent trait of the technology, and is dependent on the individual panel. Compare for instance the Samsung XL2370 and PX2370, both LED backlit screens by the same manufacture, and yet there measured peak brightness differs considerably. (
http://reviews.cnet.com/lcd-monitors/samsung-px2370/4505-3174_7-34048108-2.html?tag=rvwBody)
Conclusion -
The only reason to specifically look for a LED backlit display is you care about having a thinner monitor, very low power savings, and the arguable environmental impact. The most important characteristic by far for image quality is still the layers between the backlight and what is being shown.