Which of the following mobile device features senses movements that it then uses to ensure the screen is always oriented upright?
A. Haptic sensor
B. Photodiode
C. GPS
D. Accelerometer
Correct Answer is D. Accelerometer
Accelerometer is a sensor which provides the positioning according to the three axes used in a three dimensional positioning system.
Using an accelerometer the the mobile can calibrate it according to the positions provided in the three-dimensional access and can analyse if the screen is upright or not.