PHOTODETECTOR AND DISPLAY DEVICE PROVIDED WITH SAME

摘要

It is an object to provide a photodetector that can be configured to suppress dispersion of output characteristics among photodiodes and a display device provided with the photodetector. A display device provided with an active matrix substrate (20) that has a light transmissive base substrate (2), a plurality of active elements and a photodetector is used in an embodiment. The photodetector is comprised of a light shielding film (3) formed on the base substrate (2) and a photodiode (1) arranged on the upper layer of the light shielding film (3). The light shielding film (3) is overlapped with the photodiode (1) in the depth direction of the base substrate (2). The photodiode (1) is provided with a silicon film (11) that is electrically isolated from the light shielding film (3). A p-layer (11c), an i-layer (11b) and an n-layer (11a) are arranged to be adjacent to each other in the plane direction in the silicon film (11). The area (length (Lp)) of the p-layer (11c) is formed to be larger than that (length (Ln)) of the n-layer (11a).