How about an LCD screen that would know the instant you’re in the room? Nanao has just added an infrared sensor to its LCD display which will do exactly that. The sensor will be able to tell if there’s human presence in the room.
The monitor will consume only 18W-25W which is a whole lot less than other models. The infrared will be able to detect a person within 120cm as long as it moves. Nanao has two display sizes for us, a 20-inch version and a 23-inch version. The 20-inch model which sell for $385. What do you think about that price for an infra-red monitor.