Patent ID: 8760409

Claim:
An image display unit with screen input function for inputting information by touching operation to a pixel area comprised of a plurality of pixels on a screen formed on a first insulating substrate, said image display unit comprising, for each of said plurality of pixels: a first thin-film transistor shielded from projection of light coming from the direction of a pixel surface, and a second thin-film transistor connected in series with the first thin-film transistor and not shielded from projection of light coming from the direction of the pixel surface; a gate electrode of said first thin-film transistor being connected to an associated gate line; a gate electrode of said second thin-film transistor being connected to an associated sensor control line; a drain electrode or a source electrode of said first thin-film transistor being connected to an associated data line; and a storage capacitor having a first electrode connected to a source electrode or a drain electrode of said second thin-film transistor and to a first pixel electrode of said pixel, wherein said second thin-film transistor is turned on by a sensing time selecting signal from said sensor control line during a period different from an image display period of said pixel, and photoelectric current generated by projection light sensing of said second thin-film transistor is accumulated as electric charge in said storage capacitor, and wherein said accumulated electric charge is read out on said data line as light detecting current via said first thin-film transistor, and, after voltage conversion, said electric charge is provided as a detection signal of said touching operation.