Patent ID: 7425725

Claim:
A temperature sensor for a liquid crystal display panel, comprising: a sensor control electrode formed on a substrate; an insulating layer formed on the sensor control electrode; a semiconductor formed on the insulating layer; an ohmic contact formed on the semiconductor; a sensor input electrode and a sensor output electrode formed on the ohmic contact wherein the sensor input electrode comprises a plurality of first branches spaced by a predetermined distance and formed as a comb and the sensor output electrode comprises a plurality of second branches spaced by a predetermined distance and formed as a comb, wherein the first branches are engaged with the second branches through the semiconductor, respectively; a passivation layer formed on the sensor input electrode and the sensor output electrode; a first signal line connected to the sensor control electrode; a second signal line connected to the sensor input electrode; a third signal line connected to the sensor output electrode, and; wherein the passivation layer is further formed on the sensor control electrode and comprises a first contact hole exposing a portion of the first signal line, a second contact hole exposing a portion of the second signal line, and a third contact hole exposing a portion of the third signal line, and; wherein the temperature sensor is disposed on the liquid crystal display panel and outside an image display area of the panel.