Touch system including optical touch panel and touch pen, and method of controlling interference optical signal in touch system

摘要

A touch system including an optical touch panel and a touch pen, and a method of controlling an interference optical signal in the touch system. The optical touch panel device includes: a pattern analyzer detecting a pattern of an optical signal by scanning an optical touch panel, and comparing a detected pattern with patterns designated to button functions of a touch pen; a touch location detector recognizing a detected location of the optical signal as a touch location, if the detected pattern corresponds to a first pattern designated to a button function; an interference controller determining the optical signal as an interference signal, if a detected region of the optical signal exceeds a critical range; and a wireless transmitter outputting a control signal to the touch pen so that the touch pen may change the first pattern designated to the button function to a second pattern.