Sony has a new line of Liquid Crystal Display (LCD) TVs that use less power when they are switched on. And switch themselves off when they sense no-one is watching.

The Bravia V5 line sets, which will go on sale in most major markets worldwide, are equipped with a small sensor underneath the display that keeps watch of the room to ensure someone is there. If all the viewers leave the room it cuts power to the LCD (liquid crystal display), only to switch it back on when someone returns.

All Sony Bravia V5 models exceed the new EnergyStar 3.0 specification.