Originally Posted by lamby:
“I got my TV about 4 years ago and have noticed the movement isn't as crisp as newer ones, why is this?”
LED refers to the way the screen is lit up behind the LCD display. Your TV will have back lighting using technology similar to that used by fluorescent tube lighting you may have in your kitchen.
It's major advantage is led backlighting (in common with domestic lighting is that LED lighting is even more energy efficient than fluorescent (gas discharge) low energy lighting. LED back lit LCD TV's use significantly less energy than CCFL back lit displays.
Most of the motion artefacts you see on older LCD TV's is down to the speed at which lcd's react to a change in input. LCD technology has advanced such that they now react much more quickly so improving the ability to keep up with moving objects.
Amongst other electronic trickery this ability can be used by electronic processing to create additional frames by comparing adjacent frames to guess the position of moving objects to create extra frames so increasing the frame rate delivered to the display.
LCD quality has improved in leaps and bounds compared to 4 or 5 yrs ago. However as usual you need to buy a quality maker. The el cheapo TV's will use the older technology (hence the price).