Patent ID: 7851836

Claim:
A photosensor comprising: a gate electrode; a channel protective film having a rectangular shape, two long sides of which extend along a channel width direction, the channel protective film entirely overlapping the gate electrode; a semiconductor thin film for photoelectric conversion having a first strip portion arranged to overlap the channel protective film and a plurality of first protruding portions protruding from the first strip portion on a first side along a channel length direction; and a source electrode having a second strip portion arranged to be located on the first side relative to the channel protective film and extending along the channel width direction and a plurality of second protruding portions protruding from the second strip portion along the channel length direction toward the channel protective film, wherein the source electrode is arranged so that the second protruding portions overlap the first protruding portions and at least a part of the first strip portion, and wherein an area of the first strip portion corresponding to an area between two adjacent ones of the second protruding portions is exposed from the source electrode.