Abstract: A noise frequency detection method includes steps of: providing a frequency of system clock; fixing an operation frequency band of a sensing signal; adjusting a pulse width of the sensing signal and sampling a noise, wherein each pulse width of the sensing signal corresponds to a noise value of the noise; and referring the pulse width corresponding to a preset value of the noise to as a critical value, and obtaining a noise frequency from dividing the frequency of system clock by the critical value. A touch apparatus is also provided.

Abstract: A driving method of a touch panel includes providing a touch panel including a plurality of first sensing electrodes arranged along a first direction and a plurality of second sensing electrodes arranged along a second direction different from the first direction; simultaneously outputting driving signals through the plurality of first sensing electrodes for generating a first set of sensing signals on the plurality of second sensing electrodes; simultaneously outputting driving signals through the plurality of second sensing electrodes for generating a second set of sensing signals on the plurality of first sensing electrodes; determining whether the touch panel is touched according to the first set of sensing signals and the second set of sensing signals; and when determining the touch panel is touched, sequentially outputting driving signals through the plurality of first sensing electrodes for generating a third set of sensing signals on the plurality of second sensing electrodes.

Abstract: A noise frequency detection method includes steps of: providing a frequency of system clock; fixing an operation frequency band of a sensing signal; adjusting a pulse width of the sensing signal and sampling a noise, wherein each pulse width of the sensing signal corresponds to a noise value of the noise; and referring the pulse width corresponding to a preset value of the noise to as a critical value, and obtaining a noise frequency from dividing the frequency of system clock by the critical value. A touch apparatus is also provided.