| 摘要 |
<p>PURPOSE:To simultaneously obtain the coordinate information continuous to time, by detecting the potential proportional to the coordinate given to one resistance layer or phase difference and other resistance layer as common output, through the use of switching action by writing pressure. CONSTITUTION:The 1st resistance layer and the 2nd resistance layer are formed on the input flat plate 1 of the coordinate input unit, and the 1st and 2nd resistance layers are constituted so that they are short-circuited with the switch action by print pressure. The 1st AC frequency fx is given to the X axis electrodes, x,x' via the points 20, 21 and the 2nd AC frequency fy is given to the Y axis electrode y,y' via the points 22, 23. Further, when a pressure is given to the print pressure point 2, the AC potential to ground of rx/rx+rx' proportional to the X coordinate is short-circuited at the low loss filter fx at the point 22, 23 to the center point 24, and at the same time, the AC potential to ground of ry/ry+ry' proportional to the Y coordinate is short-circuited with the low loss filter by fy at the points 20, 21 to the center point 25, allowing to output the level corresponding to the coordinates in amplitude modulation with different two frequencies fx, fy at the output terminals 18x, 19y.</p> |
