Touch sensitive display device and method thereof

1. A display device comprising:

a display panel unit;

a sensing unit formed on the display panel unit, wherein the sensing unit comprises a sensing transistor for sensing light, and the sensing transistor comprises a control terminal which receives a sensing control voltage, an input terminal which receives a sensing input voltage and an output terminal which outputs a sensor data signal;

a sensing signal processor which receives the sensor data signal to generate a sensing signal and generates a feedback signal based on the sensing signal; and

a compensation unit which receives the feedback signal and adjusts at least one of the sensing control voltage and the sensing input voltage such that the sensing signal is bounded in a predetermined range,

wherein the adjusted at least one of the sensing control voltage and the sensing input voltage is inputted to at least one of the control terminal and the input terminal of the sensing transistor to detect a touch.

2. The display device of claim 1 , wherein the compensation unit controls the sensing signal when the sensing signal is outside of the predetermined range.

3. The display device of claim 1 , wherein the compensation unit operates based on an operating signal which is a difference between a target value and the feedback signal.

4. The display device of claim 3 , wherein the compensation unit does not adjust the at least one of the sensing control voltage and the sensing input voltage when the target value is equal to the feedback signal.

5. The display device of claim 1 , wherein the compensation unit performs one of proportional control, proportional-integral control, and proportional-integral-derivative control.

6. The display device of claim 1 , wherein the compensation unit is implemented as an analog circuit or a digital circuit.