Area sensor and display apparatus provided with an area sensor

摘要

An area sensor of the present invention has a function of displaying an image in a sensor portion by using light-emitting elements and a reading function using photoelectric conversion devices. Therefore, an image read in the sensor portion can be displayed thereon without separately providing an electronic display on the area sensor. Furthermore, a photoelectric conversion layer of a photodiode according to the present invention is made of an amorphous silicon film and an N-type semiconductor layer and a P-type semiconductor layer are made of a polycrystalline silicon film. The amorphous silicon film is formed to be thicker than the polycrystalline silicon film. As a result, the photodiode according to the present invention can receive more light.

主权项

1. A semiconductor device comprising:
a plastic substrate; a first and a second driver circuits on the plastic substrate; and a pixel portion on the plastic substrate, the pixel portion comprising a first pixel and a second pixel, each of the first pixel and the second pixel comprising a first to a fourth transistors and a capacitor, the first pixel comprising:
an EL element comprising:
a pixel electrode;a counter electrode; andan EL layer between the pixel electrode and the counter electrode; andan interlayer insulating film covering the first to the fourth transistors of the first pixel, wherein the pixel electrode, the EL layer and the counter electrode are on the interlayer insulating film, the pixel electrode being electrically connected to the one of the source and the drain of the first transistor through an opening in the interlayer insulating film, wherein the pixel portion is between the first and the second driver circuits when seen in a plan view, wherein a first line electrically connects a gate of the second transistor of the first pixel to the first driver circuit, and wherein a second line electrically connects a gate of one of the first to the fourth transistors of the second pixel to the second driver circuit.