Sony Bravia KDL-HX800

The consumer electronics industry has so far lined up behind a single 3-D TV methodology-a regular HD screen with an inexpensive infrared-signal emitter on top, though other types of synchronization emitters, including Bluetooth and RF, can also be found. The signal emitter sends out chirps every 8.3 milliseconds that tell "active" 3-D LCD glasses to successively darken the right lens and then the left, and so no. This keeps down the cost of adding 3-D for manufactures. Make sure your glasses and TV use the same type of signal.