[Sony Bravia V1]
In order to preserve energy, a new line of Sony Bravia televisions will automatically turn off when no one is in the room. The Bravia V5 line of TVs will have a small sensor under the display screen that is able to tell whether there are people in the room. If someone leaves, then the LCD screen will cut off power. When someone returns, the TV will turn back on. This will reduce energy consumption by 50% during the time that display switches off.