Let the hive mind of Engadget get that for you.
"I need help! I want a small pocket camcorder but I'm not sure which one to get. I don't want to fall into the hype of the Flip because I worry two hours won't be enough. What should I be looking for when considering a small camcorder and where can I get a good quality one with expandable memory? Thanks!"
Samsung 81-series 52" have 96 dimmable regions (zones) and each region (zone) has 12 LEDs so that's a total of 1152 LEDs.
47LG90 have 128 dimmable regions and each region has 12 LEDs so thats's a total of 1536 LEDs.