Patent ID: 9285901
Filing Date: 2016-03-15
CPC Classification: G06F

Claim Text:
1. An electronic device comprising a digital pen, the electronic device comprising: at least three reception sensors installed in the electronic device at positions that are separated from one another, the at least three reception sensors configured to receive a waveform generated by a waveform generator of the digital pen; and a processor configured to determine an input coordinate of the digital pen using a difference of velocities and reception times of the waveform received by each of the at least three reception sensors, wherein the processor is configured to determine the input coordinate of the digital pen by calculating a 2-Dimensional (2D) input coordinate of the digital pen using a difference between transfer times of at least two cases of waveforms received by the at least three reception sensors, and wherein the input coordinate of the digital pen is calculated using non-linear simultaneous equations comprising: where d