Handset device with dual side joystick

1. An electronic device comprising:

a casing having a first and second outer surfaces that are substantially opposing each other;

a circuit supporting substrate;

a first joystick mechanism and a second joystick mechanism; the first joystick mechanism extending outside of the first outer surface and the second joystick mechanism extending outside of the second outer surface;

a controller; and

a plurality of switches disposed on the circuit supporting substrate and being electrically coupled with the controller, a movement of the first joystick mechanism activating at least one of the plurality of switches to indicate a first movement direction to the controller and a movement of the second joystick mechanism activating at least one of the plurality of switches to indicate the first movement direction to the controller, the first and second joystick mechanisms being interchangeable for indicating a movement direction to the controller.

2. The electronic device of claim 1 , wherein the joystick mechanisms are coupled to each other by a mechanical means whereby applying a movable directional force to one joystick mechanism moves the other joystick mechanism in an opposite direction.

3. The electronic device of claim 2 , wherein the first and second joystick mechanisms each comprise an electrically conductive end cap.

4. The electronic device of claim 3 , further comprising:

at least two sensors, one sensor electrically coupled to each joystick mechanism end cap;

at least two oscillators, each oscillator capacitively coupled to one of the at least two sensors; and

at least two frequency detection circuits, each circuit electrically coupled to one of the at least two oscillators and to the controller, for detecting from which outer surface the movable directional force is being applied.

5. The electronic device of claim 1 , wherein the electronic device comprises at least one of a cellular phone, radio, personal data assistant, computer, electronic organizer, pager, hand-held gaming device, and an electronic timepiece.

6. A wireless electronic device comprising:

a receiver;

a transmitter;

a casing having a first and second outer surfaces that are substantially opposing each other;

a circuit supporting substrate;

a controller, communicatively coupled to the receiver and the transmitter, for controlling the operation of the receiver and transmitter and providing data to and from a user; and

a user interface, communicatively coupled to the controller, for receiving instructions from and supplying feedback to a user, the user interface comprising:

a first joystick mechanism and a second joystick mechanism; the first joystick mechanism extending outside of the first outer surface and the second joystick mechanism extending outside of the second outer surface; and

a plurality of switches disposed on the circuit supporting substrate and being electrically coupled with the controller, a movement of the first joystick mechanism activating at least one of the plurality of switches to indicate a first movement direction to the controller and a movement of the second joystick mechanism activating at least one of the plurality of switches to indicate the first movement direction to the controller, the first and second joystick mechanisms being interchangeable for indicating a movement direction to the controller.

7. The wireless device of claim 6 , wherein the joystick mechanisms are coupled to each other by a mechanical means whereby applying a movable directional force to one joystick mechanism moves the other joystick mechanism in an opposite direction.

8. The wireless device of claim 7 , wherein the first and second joystick mechanisms each comprise an electrically conductive end cap.

9. The wireless device of claim 8 , further comprising:

at least two sensors, one sensor electrically coupled to each joystick mechanism end cap;

at least two oscillators, each oscillator capacitively coupled to one of the at least two sensors; and

at least two frequency detection circuits, each circuit electrically coupled to one of the at least two oscillators and to the controller, for detecting from which outer surface the movable directional force is being applied.

10. A method of operating an electronic device having a casing that includes substantially opposing outer surfaces, one of which includes a display, comprising:

applying a directional mechanical force to a joystick mechanism within a pair of joystick mechanisms, the pair of joystick mechanisms mounted in a manner allowing at least one mechanism to protrude through each of the substantially opposing outer surfaces of the electronic device casing, wherein applying the directional mechanical force includes applying the force to the mechanism that protrudes through the outer surface that does not contain the display, thereby preventing a user's hand from obscuring the display; and

transferring the directional mechanical force to an electrical input.

11. The method of claim 10 , further comprising:

mapping the electrical input to a software function; and

performing the mapped software function.

12. The method of claim 10 , further comprising:

determining from which substantially opposed outer surface the directional mechanical force is being applied;

mapping the electrical input to a software function according to which outer surface the force is being applied; and

performing the mapped software function.

13. The method of claim 12 , wherein the determining from which substantially opposed outer surface the mechanical force is being applied comprises:

measuring an output frequency of each of a pair of oscillators, each frequency being determined by a capacitive sensor coupled to a conductive end cap of one joystick mechanism, the capacitance of the sensor varying when the end cap is touched; and

comparing each output frequency to a predetermined value.

14. A computer readable medium comprising computer instructions for:

receiving an electrical input resulting from applying a directional mechanical force to a joystick mechanism within a pair of joystick mechanisms, the pair of joystick mechanisms mounted in a manner allowing at least one mechanism to protrude through each of substantially opposing outer surfaces of an electronic device casing;

determining from which substantially opposed outer surface the directional mechanical force is being applied;

mapping the electrical input to a software function according to which outer surface the force is being applied; and

performing the mapped software function, wherein the determining from which substantially opposed outer surface the mechanical force is being applied comprises instructions for:

measuring an output frequency of each of a pair of oscillators, each frequency being determined by a capacitive sensor coupled to a conductive end cap of one joystick mechanism, the capacitance of the sensor varying when the end cap is touched; and

comparing each output frequency to a predetermined value.

15. The computer readable medium of claim 14 , further comprising instructions for:

mapping the electrical input to a software function; and

performing the mapped software function.