| 摘要 |
When the thumb slides on an operation surface of a touch pad in a Y1 direction, contact regions are sequentially expanded in the touch pad and an erroneous determination that a reference point, which is the centroid of the contact region, is reversely moved in a Y2 direction during movement to the Y1 direction is made. In this case, a specific region is set in a base end portion of the operation surface. When the contact region includes the specific region and extends to a predetermined length in the Y1 direction, it is determined that reverse movement is detected.
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