Calibration-Point-Marking Technique for a Touchscreen
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01
Touchscreen devices are often attached to CRT displays in interactive data processing systems so that an operator can input data to the system. One such device 1, shown in Fig. 1, includes a glass window 2, a frame 3 and elements 4 for securing touchscreen 1 to a display. Four piezoelectric transducers 5 are accurately secured by adhesive 6 to the glass at precise locations in the four corners, as illustrated in Fig. 2. During manufacture, touchscreen 1 is placed in a holding fixture 7, and an installation tool 8 is used to accurately position the transducers on the glass. The tool includes four cylinders 9 attached to a vacuum source 10. Transducers 5 are placed in the free ends of the cylinders and held there by the vacuum.