| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electrostatic capacity type coordinate input device having a function same as that of a matrix system by using one ITO transparent electrode sheet since a panel for detecting coordinates is structured with two ITO transparent electrode sheets, and costs are increased due to position deviation caused by adhering the two ITO transparent electrode sheets or any crack under the adhering operation or the like. <P>SOLUTION: A panel part is configured by connecting switch electrodes by a bridge resistance, and creating a panel switch structured as one sheet formed with the connected electrodes, and adhering it to an acrylic plate or the like. A control board includes: a connected electrode switching circuit; a C/F conversion circuit for converting a capacity change using an oscillation circuit into a frequency; a nonvolatile memory for storing threshold data; and a CPU incorporating a counter with an input capture function for measuring the width of waveform. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
