To provide a large screen touch panel allowing touch input via a large screen.
In this large screen touch panel system 10 including a plastic screen 12, the screen is irradiated with an infrared light source 18 from the front side of the screen 12, and in this condition, a person touches the screen manually. A camera 22 photographs the back face of the screen 12 via a mirror 20 and gives its image signal to a computer 26. On the basis of this image signal, a shaded area, in which the infrared ray is cut off by a hand, is detected by the computer 26. When the shaded area has a proper size (a size of the hand, for example), the coordinates of the shade area center are detected as a touched position on the screen 12. In this way, the large screen can be used as a touch panel.
COPYRIGHT: (C)2005,JPO&NCIPI
Mignono Laurent
Sommer Crysta
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