| 摘要 |
A touch device includes a touch panel, a stylus, a measuring wave transmitter sleeved the stylus and transmitting measuring waves, a frame surrounding the touch panel, three sensors embedded in the frame, and a processor electrically connected to the three sensors. The processor stores a coordinate system and location points of the three sensors, and calculates a location point (x, y) of the stylus according to√{square root over ((x-x11)2+(y-y11)2)}{square root over ((x-x11)2+(y-y11)2)}=√{square root over ((x-x12)2+(y-y12)2)}{square root over ((x-x12)2+(y-y12)2)}-DeltaT1�V=√{square root over ((x-x13)2+(y-y13)2)}{square root over ((x-x13)2+(y-y13)2)}-DeltaT2�V, wherein DeltaT1 is time interval between a first time point when one sensor receives the measuring waves and a second time point when another sensor receives the measuring waves, DeltaT2 is time interval between the first time point and a third time point when the remaining sensor receives the measuring waves, (x11, y11), (x12, y12), (x13, y13) are location points of the sensors receiving the measuring waves at the first, second and third time points, V is transmitting speed of the measuring waves. |
