Reference Designs

The Thermopile Based Hand Gesture Backlight Controller is a sub-system reference design that allows an LCD (Liquid Crystal Display) backlight to turn on quickly when a user waves their hand in front of the equipment housing. This design is intended as a reference design for applications requiring power control in low light conditions including thermostats, control panels, and other building automation end equipments.  The thermopile senses the presence of a user’s hand up to 5 cm away from the sensor; even in low light or in dark conditions. This eliminates the need for a user to manually touch the display or press a button to awake the systems backlight.