Patent ID: 8106401

Claim:
A display device comprising: an active matrix substrate on which a plurality of active elements are formed, a photodiode, wherein the photodiode includes a silicon film provided on a base substrate of the active matrix substrate, wherein a p-type semiconductor region, an intrinsic semiconductor region, and an n-type semiconductor region are formed sequentially in the silicon film, at least two metal lines are provided above the photodiode in such a manner that the metal lines traverse the photodiode in a direction vertical to a forward direction of the photodiode, one of the two metal lines is disposed so that an end thereof coincides with a boundary between the p-type semiconductor region and the intrinsic semiconductor region, in a thickness direction of the active matrix substrate, and the other one of the two metal lines is disposed so that an end thereof coincides with a boundary between the intrinsic semiconductor region and the n-type semiconductor region, in the thickness direction of the active matrix substrate.