Patent ID: 8356133
Filing Date: 2013-01-15
Classification: G06F

Abstract:
1. A touch module switch circuit comprising: a universal serial bus (USB) display circuit and a touch module each comprising a power pin, two data pins, and a ground pin; a first resistor and a second resistor; a first diode and a second diode each comprising an anode and a cathode; a USB switch chip comprising an input terminal, a voltage terminal, first to fourth switch input terminals, and first and second switch output terminals; and a USB interface comprising a power pin, two data pins, and a ground pin; wherein the power pin of the USB interface is connected to the anode of the first diode and connected to the input terminal of the USB switch chip through the first resistor, the input terminal of the USB switch chip is grounded through the second resistor, the cathode of the first diode is connected to the voltage terminal of the USB switch chip and the power pin of the touch module, the data pins of the USB interface are respectively connected to the first and third switch input terminals of the USB switch chip, the anode of the second diode is connected to the power pin of the USB display circuit, the cathode of the second diode is connected to the cathode of the first diode, the data pins of the USB display circuit are respectively connected to the second and fourth switch input terminals of the USB switch chip, the first and second switch output terminals of the USB switch chip are respectively connected to the data pins of the touch module; and wherein the first switch input terminal is electrically connected to the first switch output terminal and the third switch input terminal is electrically connected to the second switch output terminal in response to the input terminal of the USB switch chip being in a high voltage state, the second switch input terminal is electrically connected to the first switch output terminal and the fourth switch input terminal is electrically connected to the second switch output terminal in response to the input terminal of the USB switch chip being in a low voltage state.