Patent ID: 8558810
Filing Date: 2013-10-15
Classification: G06F

Abstract:
1. A touch device comprising: a touch panel; a stylus configured for sliding on the touch panel; a ring-shaped measuring wave transmitter sleeved over the stylus, the measuring wave transmitter being configured for radially transmitting measuring waves parallel to the touch panel when the stylus touches the touch panel; a frame surrounding the touch panel and made of a material which blocks the transmission of the measuring waves; three sensors embedded in the frame for receiving the measuring waves, each of the three sensors configured for generating a square wave signal of high-level “1” when receiving the measuring waves, each of the three sensors configured for generating a square wave signal of low-level “0” when not receiving the measuring waves; a processor electrically connected to the three sensors, and storing a coordinate system and three location points of the three sensors, the processor being configured for calculating a time interval ΔT wherein (x11, y11) is a location point of the sensor receiving the measuring waves at the first time point, (x12, y12) is a location point of the sensor receiving the measuring waves at the second time point, (x13, y13) is a location point of the sensor receiving the measuring waves at the third time point, and V is a transmitting speed of the measuring waves in the air; wherein the processor stores a predetermined number of high level “1”, when the number of high-levels “1” continuously generated by a particular one of the three sensors is less than the predetermined number of high level “1”, the processor determines that the stylus clicks on a point of the touch panel; and when the number of high-levels “1” continuously generated by the particular one of the three sensors is larger than or equal to the predetermined number of high level “1, the processor determines that the stylus slides or stops on the touch panel.