| 摘要 |
PROBLEM TO BE SOLVED: To provide a touch sensor resistant to disturbance.SOLUTION: A touch sensor 30 comprises: eight electrodes 41 to 48 that are circularly arranged at equal intervals and are shaped identically; a C/V converter that generates voltage according to a variation in capacitance for each of the electrodes 41 to 48; and a calculation circuit 70 that calculates a touch position on the basis of the voltage generated by the C/V converter. The calculation circuit 70 calculates, on the basis of the voltage generated by the C/V converter, a center angle that is an angle formed between a reference line passing through a center of the circle and extending in a radial direction and a line connecting the center of the circle with the touch position, and determines the presence or absence of stillness by comparing a difference in an average of the center angles between the touch positions until this time and the touch positions until previous time with a preset stillness determination value. |
