Patent ID: 8203542
Filing Date: 2012-06-19
Classification: G06F

Abstract:
1. A pointing device comprising: a touch plane being divided into an upper region, a lower region, a left region and a right region, and an object moving on the regions to correspondingly generate different sounds; a microphone for converting the different sounds into different sound wave signals with different waveforms when the object moves on the corresponding regions, and a control unit for storing characteristic data corresponding to each region and for analyzing the sound wave signals to determine a moving direction of the object on the touch plane when receiving the sound wave signals according to the different waveforms of the received sound wave signals and the characteristic data, so as to correspondingly generate a direction signal; wherein the pointing device has a first frequency, a second frequency, a third frequency, and a fourth frequency, wherein only the first frequency is associated with the upper region, only the second frequency is associated with the lower region, only the third frequency is associated with the left region, and only the fourth frequency is associated with the right region.