| 主权项 |
1. A control system for a touch screen, the touch screen comprising a screen and a touch sensor, the control system comprising:
a screen controller, for generating a common voltage to the screen, the common voltage varying within a first signal range; a voltage-level shifter, having an input terminal and an output terminal, the input terminal being coupled to the common voltage; the voltage-level shifter providing a timing signal at the output terminal according to the common voltage, the timing signal varying within a second signal range, the first signal range being different from the second signal range; and a touch controller, coupled to the output terminal, for controlling the touch sensor according to the timing signal; wherein said common voltage is directly coupled to an AC coupling circuit of said voltage-level shifter. |
