Patent ID: 7105752

Claim:
A method for avoiding pressing inaccuracies in a touch pad, the touch pad comprising: a panel for generating a plurality of analog voltage signals; a control module, comprising an analog-to-digital converter for transforming the plurality of analog signals to a plurality of corresponding digital signals, electrically connected to the panel for monitoring the panel and receiving a plurality of analog voltage signals, (he control module further comprising a touch apparatus for generating a trigger signal and a delay buffer electrically connected between the touch apparatus and the processor for buffering the trigger signal; and a processor electrically connected to the control module for receiving and processing the plurality of digital signals to control operations of the touch pad; the method comprising: (a) sequentially receiving the plurality of analog signals generated by the panel when the panel is touched with the control module; (b) transforming the plurality of analog voltage signals to a plurality of corresponding digital signals and transmitting the plurality of digital signals to the processor with the analog-to-digital converter; (c) neglecting a first m digital signals of the plurality of digital signals wherein m is an integer with value equal to or larger than 1 with the processor to avoid pressing inaccuracies when touch of the panel is initiated; (d) neglecting a last n digital signals of the plurality of digital signals wherein n is an integer with value equal to or larger than 1 with the processor to avoid pressing inaccuracies when touch is removed from the panel; (j) in step (a), when the panel is touched, outputting the trigger signal with the touch apparatus to the processor for initiating the processor to sequentially read the plurality of digital signals; and (k) in step (j), before the trigger signal is transmitted to the processor, buffering the trigger signal with the delay buffer to avoid pressing inaccuracies of the touch pad.