Patent ID: 11973161
Assignee: JAPAN DISPLAY INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A photo sensor device comprising:
a gate line, a signal line, and photo sensor circuit disposed on a substrate,
wherein
the photo sensor circuit includes a photo transistor, a first switching transistor, a second switching transistor and a capacitance element,
the first switching transistor has a first oxide semiconductor layer, a first gate electrode and a gate insulation film between the first oxide semiconductor layer and the first gate electrode,
the photo transistor has an oxide semiconductor layer for the photo transistor, a gate electrode for the photo transistor and the gate insulation film,
the capacitance element has a first terminal and a second terminal,
the first oxide semiconductor layer and the oxide semiconductor layer for the photo transistor are disposed same layer,
the first gate electrode, the gate electrode for the photo transistor and the first terminal are disposed same layer,
a drain electrode of the photo transistor connects to a first drain electrode of the first switching transistor, and
the second switching transistor has a second gate electrode connected to the gate line, a second source electrode connects to the signal line and a second semiconductor layer.