APPARATUS FOR TOUCHING A PROJECTION OF IMAGES ON AN INFRARED SCREEN

摘要

PURPOSE: A projection image touch apparatus of a pulse operation mode is provided to make the brighter projection image touch apparatus emitted from the infrared LED by driving the infrared ray LED in a pulse mode. CONSTITUTION: An infrared ray LED(Light Emitting Diode) array(110) emits infrared ray and generates an infrared screen in the space. An infrared ray camera(120) is installed in the infrared ray screen. A projector projects the image on the infrared ray screen. A pulse generator(170) generates a pulse signal and controls a pulse width for projecting the infrared ray LED array. An LED driver(180) supplies DC power to the infrared ray LED array.