Patent ID: 8169415

Claim:
A touch sensor device, comprising: at least one terminal connected to at least one contact pad; at least one common terminal; at least one light emitter connected between the common terminal and the terminal; and a touch sensor and light-emission controller unit connected to the common terminal and the terminal, and when a touch is sensed by the contact pad, controlling a corresponding light emitter to emit light; wherein the touch sensor and light-emission controller unit comprises: a touch sensor for recognizing a signal applied to the terminal and outputting touch detection signals in response to a first control signal during a first time period; a light-emitting device controller for controlling a current to flow from the common terminal through a selected terminal in response to a second control signal during a second time period; and a controller for outputting the first control signal to the touch sensor and generating the second control signal in response to the touch detection signals; wherein the light-emitting device controller comprises: at least one light-emission flicker connected between a supply voltage and the common terminal, and connected with the light emitter; and a light-emitting device driving unit for making the current flow to the terminal and applying a light-emission control voltage to the light-emission flicker in response to the second control signals.