| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the problem that, in switch operation of an electrostatic coupling type touch panel, judgment cannot be made when the power is turned on while a finger is touching, and that ON/OFF operation of a switch thereafter is not possible, in the case where an existing micro controller is used to realize stable ON/OFF operation at a low cost with high precision. <P>SOLUTION: The signal outputted from the touch panel of electrostatic coupling type through an oscillation circuit enters an input capture, where capturing is repeated by required times and the initial value of resultant added value is taken as an offset value. Further threshold values of ON/OFF are separately prepared. A differential value between the offset value and the value added by repeating capturing as required is calculated, which is compared with the threshold value of ON for stable judging of ON/OFF. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
