Patent ID: 7158098

Claim:
A portable information processing system comprising: a display device having a liquid crystal panel having a pixel portion, a driver portion and an image sensor portion; and a portable information terminal, wherein the liquid crystal panel comprises: a transparent substrate having at least one pixel; a first thin film transistor and a second thin film transistor disposed in the at least one pixel; a first insulating film covering the first and second thin film transistors; a photoelectric conversion element formed over the first insulating film and electrically connected to the first thin film transistor through the first insulating film wherein the photoelectric conversion element comprises a first electrode formed over the first insulating film, a photosensitive semiconductor film formed over the first electrode, and a transparent second electrode formed over the photosensitive semiconductor film; a second insulating film formed over the first insulating film and the photoelectric conversion element; and a transparent pixel electrode formed over the second insulating film and electrically connected to the second thin film transistor, wherein the display device displays an image from the portable information terminal, and wherein data is sent and received between the display device and the portable information terminal by infrared rays.