Patent ID: 8111344
Filing Date: 2012-02-07
Classification: G02F,H01L

Abstract:
1. A liquid crystal display device with sensing function comprising: a gate line and a data line crossing each other on a substrate, so as to define a pixel region including a pixel electrode; a first switching thin film transistor formed at a crossing of the gate and data lines; a first driving voltage supplying line and a second driving voltage supplying line being parallel to the gate line, a sensing thin film transistor, formed at a predetermined portion of the pixel region and connected to a driving voltage supplying line, for sensing external light; a sensing storage capacitor for storing a signal sensed by the sensing thin film transistor; a second switching thin film transistor for receiving the sensing signal stored and reading externally inputted information, a read-out line being parallel to the data line and connected to the second switching thin film transistor, a first passivation film formed on the sensing storage capacitor and the second switching thin film transistor; a reflective electrode formed on the first passivation film and overlapping the sensing storage capacitor and the second switching thin film transistor so as to provide a reflective region, and a second passivation film formed between the reflective electrode and the pixel electrode, wherein the sensing thin film transistor, the sensing storage capacitor and the second switching thin film transistor are formed into an in-line type and adjacent to the read-out line, wherein the pixel electrode overlaps the sensing storage capacitor and wherein the first passivation film, the reflective electrode and the second passivation film are formed between the sensing storage capacitor and the pixel electrode, and wherein the first passivation film is removed on the sensing thin film transistor and the second passivation film contacts with the sensing thin film transistor, wherein the first passivation film is thicker than the second passivation film.