User interface device driving chip for providing improved input feedback and electronic device using the same

1. A vibration motor driving device that controls a vibration motor, the vibration motor driving device comprising:

a control signal selection unit configured to receive a second control signal provided from a touch detection unit for detecting a touch input to a touch panel and including information for controlling the vibration motor;

wherein the control signal selection unit is further configured to receive a first control signal including information for controlling the vibration motor from an AP performing one or more applications using information on a touch input provided from the touch detection unit;

wherein when a delay between the second control signal, which is most recently received before receiving the first control signal, and the first control signal is determined to be equal to or less than a predetermined value and the first control signal and the second control signal are all for instructing the driving of the vibration motor to the touch input, the control signal selection unit is configured to discard the first control signal; and

a driving current output unit configured to output a vibration motor driving current for driving the vibration motor according to the second control signal.

2. An electronic device comprising a touch detection unit, a vibration motor driving unit, and an AP for performing one or more applications using information on a touch input provided from the touch detection unit,

wherein the touch detection unit detects a touch input to a touch panel connected to the touch detection unit, generates a second control signal including information for controlling the vibration motor driving unit in correspondence to the detected touch input, and provides the generated second control signal to the vibration motor driving unit,

wherein the vibration motor driving unit is configured to {circle around (1)} output a vibration motor driving current for driving a vibration motor according to the second control signal, and {circle around (2)} receive a first control signal including information for controlling the vibration motor driving unit from the AP, and {circle around (3)} discard the first control signal when a delay between the second control signal, which is most recently received before receiving the first control signal, and the first control signal is determined to be equal to or less than a predetermined value and the first control signal and the second control signal are all for instructing the driving of the vibration motor to the touch input.

3. The electronic device of claim 2 , further comprising a power supply unit for providing power to the vibration motor driving unit,

wherein the touch detection unit is configured to provide a second wake-up signal to the power supply unit in response to the touch input,

wherein the power supply unit is configured to switch to an active mode to supply power to the vibration motor driving unit when receiving the second wakeup signal while the power supply unit is in an idle mode.

4. A user output interface device driving chip for controlling a user output interface device that stimulates a person's view point, a hearing sense, and a tactile sense, the user output interface device driving chip comprising a control signal selection unit configured to discard the first control signal when {circle around (1)} receiving a second control signal including information for controlling the user output interface device from a touch detection unit for detecting a touch input to the touch panel, {circle around (2)} receiving a first control signal including information for controlling the user output interface device from an AP that performs one or more applications using information on the touch input provided from the touch detection unit, and {circle around (3)} a delay between the second control signal, which is most recently received before receiving the first control signal, and the first control signal is determined to be equal to or less than a predetermined value and the first control signal and the second control signal are all for instructing the driving of the vibration motor to the touch input,

wherein the user output interface device driving chip is configured to control the user output interface device according to the second control signal.