Proximity sensor with internal temperature sensor and method of operating the same

A method of operating a proximity sensor provided with multiple channels reacting to user contact and a proximity sensor chip (IC) connected to the multiple channels through a sensing line and including an internal temperature sensor, the method comprising the steps of:

• sensing a first sensing value through the multiple channels;
• sensing a second sensing value through the internal temperature sensor;
• and
• compensating the first sensing value through addition or subtraction of the second sensing value with respect to the first sensing value,
• wherein the step of sensing a second sensing value comprises:
• generating first clock signals variable according to temperature characteristics through a first oscillator of the internal temperature sensor;
• generating second clock signals at time intervals set according to a setting condition corresponding to the first clock signals through a timer of the internal temperature sensor;
• generating third clock signals independent of temperature change through a second oscillator of the internal temperature sensor, followed by counting the second clock signals using the third clock signals through a counter of the internal temperature sensor;
• capturing a counted value with reference to the second clock signals to send the counted value through a buffer, the counted value being obtained by counting the second clock signals;
• and
• outputting the value received from the buffer, and
• the output value is the second sensing value.