| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the mixing-in of noise, to eliminate the charges of the X axis sheet/Y axis sheet of floating, to prevent erroneous detection and to detect accurate pen-down/X coordinate value/Y coordinate value by putting an insulation sheet between a touch panel and an LCD and CRT, etc. SOLUTION: The touch panel 1 is provided with the structure of orthogonally piling up the X axis sheet 11 and the Y axis sheet 12 formed from a resistance film sheet and is provided with the transparent insulation sheet for eliminating the noise under. A controller 2 turns both ends of the X axis sheet 11 of the touch panel 1 provided with the insulation sheet under to an H level, A/D converts the potential of the Y axis sheet 12, compares it with a reference value and detects that pressing is performed. Also, both ends of the X axis sheet 11 are turned to the H level and an L level, the potential of the Y axis sheet 12 is A/D converted and the X coordinate value of a pressed point is detected. Also, both ends of the Y axis sheet 12 are turned to the H level and the L level, the potential of the X axis sheet 11 is A/D converted and the Y coordinate value of the pressed point is detected.</p> |
