Three-Point Touch Control System
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01
A touch panel spaced from a CRT display is mounted by three spaced piezoelectric transducers each including a preload force compressing the transducers before the panel is touched. Fig. 1 is a partial cross-sectional view of a display and touch screen mounted by piezoelectric transducers. Fig. 2 is a front view of the screen and CRT. As shown in the figures, a display 1, which is preferably a cathode ray tube (CRT), has a touch screen 2 mounted at a spaced location from the face of the display, supported at three points by piezoelectric transducers 3, 4, 5. The transducers 3, 4, 5 are arranged to form an isosceles triangle. The touch screen 2 is, in its preferred embodiment, a flexible screen which is carried on a frame (Image Omitted) member 6 which is in engagement with the piezoelectric transducer 3.