Keyboard circuit of light emitting anti-ghosting keyboard

A keyboard circuit of a light-emitting anti-ghosting keyboard, comprising:

• a switch unit including a plurality of first driving lines, a plurality of second driving lines, a plurality of sensing lines, and a plurality of switch modules, each of said plurality of switch modules electrically connected to one of said plurality of first driving lines, one of said plurality of second driving lines, and one of said plurality of sensing lines, and including
• a switch having a first end and a second end, said first end of said switch electrically connected to said one of said plurality of sensing lines,
• a current-limiting resistor having a first end electrically connected to said second end of said switch, and a second end electrically connected to said one of said plurality of first driving lines, and
• a light-emitting diode (LED) having an anode electrically connected to said second end of said switch and said first end of said current-limiting resistor, and a cathode electrically connected to said one of said plurality of second driving lines;
• and
• a processing unit including
• a first driving module electrically connected to said plurality of first driving lines, and configured to transmit a high voltage-level signal to said plurality of first driving lines,
• a second driving module electrically connected to said plurality of second driving lines, and configured to transmit a low voltage-level signal to said plurality of second driving lines, and
• a sensing module electrically connected to said second driving module, including a plurality of sensing pins that are electrically connected respectively to said plurality of sensing lines, and configured to measure an analog value of voltage at each of said plurality of sensing pins.