| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide the technology which enables detection without any accuracy deterioration even when a touch sensor of a capacitance system is installed close to a display device. <P>SOLUTION: A detection circuit is provided with a charge storage capacity, and configured to storage charge to be supplied from a power source. A capacity change with the touch of the finger is detected based on electric charge moving to the electrode of a touch sensor from the charge storage capacity. The charge moving to the electrode of the touch sensor is discharged as necessary by a switch 2, and the reference potential of the charge storage capacity is connected through a switch 3 to the potential of a noise generation source so that it is possible to cancel the noise intruding from the electrode of the touch sensor to the charge storage capacity. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
