| 摘要 |
A touch input device includes a touch panel (11), a controller (21), and a cancellation electrode (12, 13, 31). The touch panel (11) includes a sensor pattern (14) and an operation surface (11 a) arranged above the sensor pattern (14). The sensor pattern (14) includes first electrodes (12) and second electrodes (13) insulated from one another and arranged in a grid. The controller (21) applies a drive pulse signal to the sensor pattern (14) and detects a touch location where the operation surface (11 a) of the touch panel (11) is touched based on changes in capacitance of the sensor pattern (14). A cancellation pulse signal is applied to the cancellation electrode (12, 13, 31) during application of the drive pulse signal. The cancellation pulse signal has a phase inverted from that of the drive pulse signal. |
