Input device, electronic device including the same, and control method thereof

A device for controlling an electronic device, comprising:

• an optical sensor that receives an optical signal reflected from a rotating body in a rotary motion;
• one or more magnetic sensors that detect a magnetic force of at least one magnet attached to the optical sensor and that generates a magnetic force signal using the detected magnetic force;
• a controller that estimates a rotation value of the rotating body based on the optical signal, estimates an auxiliary rotation value of the rotating body based on the magnetic force signal, determines a final rotation value by reflecting the auxiliary rotation value in the rotation value, and determines a mode of the electronic device according to the final rotation value;
• and
• a fixed body to which the rotating body is coupled and rotates,
• wherein a first magnetic material and a second magnetic material are disposed on the rotating body and the fixed body, respectively,
• wherein a value of an amount, a direction or a speed of rotation recognized by the optical sensor is corrected by using a magnetic force of the first magnetic material that is detected by the magnetic sensors, and
• wherein the magnetic sensors are disposed on opposite sides of the optical sensor and are used to detect the magnetic forces generated from the first magnetic material and to correct the value of the amount and direction of the rotation recognized by the optical sensor.

A method of controlling an electronic device, comprising:

• rotating a body which is coupled to a fixed body, wherein a first magnetic material is disposed on the rotating body and a second magnetic material is disposed on the fixed body such that a clicking sensation to the rotation of the rotating body is generated by a magnetic force between the first and second magnetic materials, and wherein an optical sensor and one or more magnetic sensors are disposed on the fixed body such that an amount, a direction, or a speed of rotation of the rotating body is recognized by the optical sensor;
• estimating a rotation value of the rotating body based on an optical signal reflected from the rotating body in a rotary motion;
• estimating an auxiliary rotation value of the rotating body based on a signal obtained by detecting a magnetic force signal;
• determining a final rotation value by reflecting the auxiliary rotation value in the rotation value;
• and
• controlling the electronic device according to the final rotation value,
• wherein a value of the amount, direction or speed of rotation recognized by the optical sensor is corrected by using the magnetic force of the first magnetic material that is detected by the magnetic sensors, and
• wherein the one or more magnetic sensors are disposed on opposite sides of the optical sensor and are used to detect the magnetic forces generated from the first magnetic material and to correct the value of the amount and direction of the rotation recognized by the optical sensor.

An electronic device comprising:

• an outer housing that has a first surface, and a second surface opposite to the first surface;
• an opening formed in the first surface;
• a bezel that surrounds an outer periphery of the opening and is rotatably supported by the first surface;
• and
• at least one electronic component accommodated in the outer housing,
• wherein the bezel comprises one or more magnets disposed separate from each other and a pattern formed on a surface of the bezel that is directed towards the outer housing, wherein the outer housing comprises a part adjacent to the bezel, the part including at least one magnetic force detection sensor that detects the one or more magnets and an optical sensor that optically detects the pattern,
• wherein a first magnetic material and a second magnetic material are disposed on the bezel and the outer housing, respectively,
• wherein a value of an amount, a direction or a speed of rotation recognized by the optical sensor is corrected by using a magnetic force of the first magnetic material that is detected by the magnetic force detecting sensors, and
• wherein the magnetic force detection sensors are disposed on opposite sides of the optical sensor and are used to detect the magnetic forces generated from the first magnetic material and to correct the value of the amount and direction of the rotation recognized by the optical sensor.