LIGHT SENSOR CIRCUIT AND DRIVING METHOD THEREOF AND TOUCH SCREEN PANEL HAVING THE SAME

摘要

PURPOSE: A light sensor circuit, a driving method thereof, and a touch screen panel having the same are provided to maximize the light reception region of a light reception device by minimizing the number of power lines and signal lines when designing a light sensor circuit. CONSTITUTION: A photo diode(PD) is connected to a first power source, and a capacitor(C) is connected between the light reception device and a second power source. A gate electrode is connected to a first electrode of the capacitor in a first transistor(T1), and the first transistor is connected between a selection signal line and the first electrode of the second transistor. The gate electrode is connected to the selection signal line in a second transistor(T2). The second transistor is connected the second electrode and an output signal line in the first transistor. The gate electrode is connected to an initialization power source in a third transistor which is connected between the second power source and the output signal line.