TOUCH SYSTEM AND DISPLAY DEVICE INCLUDING OF SAME

摘要

PURPOSE: A touch system and a display device including of same are provided to accurately sense the touch point of a user in order to detect the coordinate of the touch point. CONSTITUTION: An optical sensor module(110) includes a light emitting sensor(111) and a light receiving sensor(113) arranged adjacent to a lower portion of a substrate(101). A pulse generator of a sensing control circuit(120) outputs a pulse signal of a first frequency band. A filter(124) filters the sensing signal outputted from the light receiving sensor in a first frequency band. A comparison unit(125) compares the filtered signal with a pulse signal, and senses based on the comparison result whether or not the touch point of the user occurs. By counting the comparison results for a certain time, a counter(126) outputs a touch sensing signal.