LCD or LED

Interesting observation 1775. I have a 42" Vizio LCD in my den, about 6 years old, that I have no problem watching at pretty extreme angles. When I am at the computer I am to the left of the tv and can see very clearly. It is also mounted with the bottom of the screen 45" from the floor and I typically watch sitting and or laying on the couch with no problem. I would be curious what the difference might be as I have been really pleased with the Vizio and we will be buying another tv for the living room soon.