Patent ID: 8902199

Claim:
An infrared touch screen capable of sensing multi touch points, the infrared touch screen comprising: a screen provided with a display panel on which an image is projected and a reinforced glass plate formed on a front surface of the display panel and protects the display panel and to which the touch is made; an optical scanner formed on one side of the screen and scanning the screen with the infrared; a light guide bar formed on a border of the reinforced glass plate and reflecting a part of the infrared which is projected from the optical scanner and passes through the reinforced glass plate, and guiding the rest non-reflected infrared incident inside the reinforced glass plate and transferring to one end thereof; a light receiving portion provided on a distal end of the light guide bar and receiving the infrared which is transferred through the light guide bar; and a position detector for detecting the touch position with a scanning angle of the optical scanner when the amount of the light received in the light receiving portion is a little wherein the infrared reflected from the light guide bar in incident to other light guide bars which are formed, corresponding to the light guide bar reflecting the infrared, wherein the optical scanner comprises: an infrared emitting element for emitting infrared; a rotation part for rotating the infrared emitted from the infrared emitting element and scanning the entire area of the screen, a driving part for applying a rotation force to the rotation part, and an angle measuring part provided on one side of the driving part for measuring a rotation angle of the rotation part, and wherein the driving part comprises: a rotation magnet formed rotatively as a circular plate and forming the rotation part in a same direction, and a driving electromagnet provided on one side of the rotation magnet and receiving power to produce a magnetic power and rotating the rotation part.