Patent ID: 8890837

Claim:
A liquid crystal display having touch sensing functionality, the liquid crystal display comprising: a scan line for transmitting a scan signal; a gate line for transmitting a gate signal; a sensing unit, electrically connected to the scan line and the gate line, for providing a first analog readout signal according to the scan signal and the gate signal, the sensing unit comprising: a first transistor having a first end electrically connected to the gate line, a gate end, and a second end electrically connected to the gate end; a first capacitor electrically connected between the gate line and the second end of the first transistor; a second capacitor having a first end electrically connected to the second end of the first transistor, and a second end for receiving a common voltage; a voltage boost unit, for boosting a primary sense voltage at the first end of the second capacitor to become a secondary sense voltage according to the scan signal, the voltage boost unit comprising a third transistor having a first end electrically connected to the first end of the second capacitor, a gate end electrically connected to the scan line, and a second end electrically connected to the gate end of the second transistor, and the voltage boost unit further comprising a third capacitor electrically connected between the scan line and the second end of the third transistor; and a second transistor having a first end directly coupled to the gate line, a gate end electrically connected to the voltage boost unit for receiving the secondary sense voltage, and a second end for outputting the first analog readout signal; and a first readout line, electrically connected to the second end of the second transistor, for transmitting the first analog readout signal; wherein capacitance of the second capacitor changes during a touch event for generating the first analog readout signal corresponding to the touch event.