Patent ID: 8970557
Filing Date: 2015-03-03
Classification: G06F

Abstract:
1. A position detecting method, comprising: performing a first detecting stage including: receiving a partial output electrical signal provided by a different portion of each received surface acoustic wave (SAW) segment and combining all of the partial output electrical signals to form a complete output electrical signal; detecting one or more first-stage depression in the complete output electrical signal, wherein each first-stage depression is larger than a threshold; and determining a position based on each first-stage depression, when a first-stage depression spanning over multiple partial output electrical signals, performing a second detecting stage, including: generating a segment of second-stage SAW based on each first-stage depression spanning over multiple partial output electrical signals, and receiving the second-stage SAW to generate a second-stage output electrical signal based on the received second-stage SAW; and detecting the position based on a portion in the second-stage output electrical signal corresponding to the first-stage depression.