System for achieving capacitance detection and electromagnetic detection

The invention relates to the field of touch control and discloses a system for achieving capacitance detection and electromagnetic detection. A transverse row of wires and a vertical row of wires included by a sensing antenna multiplex array are located in a touch area of a touch control screen panel, a capacitance and electromagnetic touch control chip is provided with a TX end, an RX end and an EM Detect end, one end of the TX end, one end of the RX end and one end of the EM Detect end are respectively provided with one chip lead in a multiplex mode, and the other end of the TX end, the other end of the RX end and the other end of the EM Detect end are connected with one end of the transverse row of the wires and one end of the vertical row of the wires. When capacitance touch detection is carried out on the system, all switches in a switch array are turned off, and the transverse row of the wires and the vertical row of the wires constitute sensors of a capacitance screen; when electromagnetic touch detection is carried out on the system, all the switches are turned on, and the transverse row of the wires and the vertical row of the wires constitute antenna loops of an electromagnetic screen; when a part of the switches are turned off and a part of the switches are turned on, a part of the transverse row of the wires and a part of the vertical row of the wires constitute the sensors of the capacitance screen, and a part of the transverse row of the wires and a part of the vertical row of the wires constitute the antenna loops of the electromagnetic screen. Compared with the prior art, time division multiplex access of capacitance detection and electromagnetic detection is achieved through one set of sensing antennas on the single chip.