Systems and methods for touch-sensing and led-control for use in capacitive touch screens

A control chip for touch sensing and LED control for a touch screen, the control chip comprising:

• m first multiplexing terminals, m being an integer greater than 2;
• and
• n second multiplexing terminals, n being an integer greater than 2;
• wherein:
• an ith first multiplexing terminal of the m first multiplexing terminals and a jth second multiplexing terminal of the n second multiplexing terminals are configured to connect with a rth LED of k LEDs, r is an integer greater than 0 and less than or equal to k, i is an integer greater than 0 and less than or equal to m, j is an integer greater than 0 and less than or equal to n;
• and
• one multiplexing terminal selected from the m first multiplexing terminals and the n second multiplexing terminals is configured to connect with each teach-sensing capacitor of (m+n) touch-sensing capacitors.

The method for switching states between touch-sensing and LED-control for a touch-screen using a control chip, the method comprising:

• initializing a touch-sensing function and an LED-control function;
• enabling a touch-sensing channel and an LED-control channel;
• determining whether the LED-control function is activated;
• if the LED-control function is activated, switching to the LED-control channel to implement the LED-control function;
• determining whether the touch-sensing function is activated;
• and
• if the touch-sensing function is activated, switching to the touch-sensing channel to implement the touch-sensing function.