Display device
A display device includes a display panel including a display portion having a plurality of pixels; and a sensor element disposed on a rear side of the display portion. The display portion has a first region overlapping the sensor element and a second region other than the first region in a plan view. Each of the plurality of pixels has a semiconductor device including a channel portion and a conductive portion made of an oxide semiconductor having a polycrystalline structure. Each of the plurality of pixels in the first region is connected by a first signal line comprising the same layer as the conductive portion, and each of the plurality of pixels in the second region is connected by a second signal line comprising a metal layer connected to the conductive portion.
1 . A display device comprising:
a display panel including a display portion having a plurality of pixels and a signal line; and
a sensor element disposed on a rear side of the display portion, wherein
the display portion has a first region overlapping the sensor element and a second region other than the first region in a plan view,
each of the plurality of pixels has a transistor having a semiconductor layer including a channel portion and a conductive portion made of an oxide semiconductor having a polycrystalline structure,
the signal line extends from the first region to the second region,
the signal line includes a first part overlapping the first region and a second part overlapping the second region,
the first part comprises the same layer as the conductive portion,
the second part comprises a metal layer,
the conductive region of the transistor in the first region is connected to the first part by being uni-formed, and
the conductive region of the transistor in the second region is connected to the second part via a contact hole.
2 . The display device according to claim 1 , wherein the second part includes a plurality of second parts, and the first part is between two of the second parts in a plan view.
3 . The display device according to claim 1 , wherein the pixel density in the first region is smaller than the pixel density in the second region.
4 . The display device according to claim 1 , wherein
the plurality of pixels are arranged on a substrate, and
a thickness of the substrate in the first region is thinner than that in the second region.
5 . The display device according to claim 1 , wherein a sheet resistance of the conductive portion is less than 500 Ω/square.
6 . The display device according to claim 1 , wherein the sensor element is an imaging device.