Liquid crystal display including sensing unit

A liquid crystal display comprising:

• a plurality of image scanning lines;
• a plurality of image data lines intersecting the image scanning lines;
• a plurality of sensor data lines intersecting the image scanning lines;
• a plurality of sensor scanning lines intersecting the sensor data lines;
• a plurality of pixels connected to the image scanning lines and the image data lines;
• and
• a plurality of sensing units connected to the sensor data lines,
• wherein the pixels comprise liquid crystal capacitors and switching elements connected to the liquid crystal capacitors, one of the image scanning lines, and one of the image data lines, respectively,
• wherein the sensing units comprise:
• variable capacitors having capacitance which varies based on pressure;
• and
• reference capacitors,
• wherein a sensing electrode of each variable capacitor is connected to a first electrode of a corresponding one of the reference capacitors and one of the sensor data lines,
• a second electrode of the corresponding one of the reference capacitors is connected to one of the sensor scanning lines, and
• the sensing unit detects a touch position by sensing a voltage of the sensing electrode of each variable capacitor.

A liquid crystal display comprising:

• a first panel comprising a common electrode;
• a second panel facing and separated from the first panel;
• an image scanning line formed on the second panel;
• an image data line formed on the second panel and intersecting the image scanning line;
• a thin film transistor connected to the image scanning line and the image data line;
• a pixel electrode connected to the thin film transistor and facing the common electrode;
• a sensor data line formed on the second panel, extending in parallel to the image data line, and facing the common electrode;
• a sensor scanning line disposed on the second panel;
• a reference electrode formed on the second panel wherein the reference electrode extends from the sensor scanning line and overlaps a part of the sensor data line and a reference capacitor is formed by the reference electrode and the part of the sensor data line;
• and
• a liquid crystal layer interposed between the first and second panel;
• wherein a voltage of the sensor data line is varied by a variance of capacitance formed by the common electrode, the sensor data line and the liquid crystal layer,
• the capacitance varies according to pressure on the first panel, and
• touch positions are detected by the voltage of the sensor data line.