What is Eco Sensor in Samsung H Series TV(UA40H6400)?

With Eco Sensor, your Samsung TV can intelligently adapt its picture according to the intensity of the light in the room. This technology measures the amount of existing light and automatically adjusts the brightness of the image on your TV, plus it saves energy.
 

Below mentioned are the advantages of Eco sensor : 

● It automatically adjusts the TV's brightness level based on the ambient light level to reduce the TV's power consumption.
● If the Eco Sensor has adjusted the screen's brightness level, you can manually adjust the screen's minimum brightness level by adjusting the Min. Backlight.
● Changing the Picture menu's Backlight setting while Eco Sensor is running automatically disables Eco Sensor.