Patent ID: 8896526

Claim:
A smartwatch, comprising: a tilt sensor unit configured to sense a tilt of the smartwatch; a display unit configured to display visual information; and a processor configured to control the tilt sensor unit and the display unit, wherein the processor is further configured to: determine a reference position of the smartwatch positioned on a user's wrist when the user is wearing the smartwatch, acquire, using the tilt sensor unit, an outward rotation angle of the smartwatch on the wrist when the smartwatch on the wrist rotates in an outward direction from the determined reference position of the smartwatch based on an outward rotation of the wrist, and perform an outward command corresponding to the outward direction when the acquired outward rotation angle exceeds an outward threshold angle, and acquire, using the tilt sensor unit, an inward rotation angle of the smartwatch on the wrist when the smartwatch on the wrist rotates in an inward direction from the determined reference position of the smartwatch based on an inward rotation of the wrist, and perform an inward command corresponding to the inward direction when the acquired inward rotation angle exceeds an inward threshold angle, wherein the outward threshold angle is set to an angle different from the inward threshold angle to compensate for physical limitations associated with rotation of the wrist.