METHOD FOR PREVENTING FALSE ACTIVATION OF TOUCH PAD

摘要

A method for preventing a false activation of a touch pad is provided. In the method, a touch area of the touch pad is divided into subareas. A lock threshold Nlock and a sensing signal threshold Vlock are set. The touch pad is scanned when there is a touch acted on the touch pad. A quantity Ni of touch points in each of the subareas is counted. If the quantity Ni of the touch points in a certain subarea is less than Nlock, the one subarea is maintained touchable, if not, the certain subarea is maintained untouchable.

主权项

1. A method for preventing a false activation of a touch pad, the touch pad defining a touch area, the method comprising:
setting a lock threshold Nlock and a sensing signal threshold Vlock; scanning the touch pad and detecting a plurality of touch nodes in each of a plurality of subareas of the touch pad and a sensing signal value Vi corresponding to each of the touch nodes when there is a touch acted on the touch area; determining if the sensing signal value Vi corresponding to each of the plurality of touch nodes is larger than or equals to the sensing signal threshold Vlock, determining a certain touch node being as a touch point when the sensing signal value Vi corresponding to the certain node is larger than or equals to the sensing signal threshold Vlock; counting a quantity Ni of touch points in each of the plurality of subareas; determining if the quantity Ni of the touch points in each of the plurality of subareas is less than the lock threshold Nlock; maintaining a certain subarea being touchable when the quantity Ni of the touch points in the certain subarea is less than the lock threshold Nlock; and maintaining the certain subarea being untouchable when the quantity Ni of the touch points in the certain subarea is larger than or equals to the lock threshold Nlock.