Patent ID: 11901465
Assignee: JAPAN DISPLAY INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An optical sensor comprising:
a substrate; and
a first transistor, a second transistor, and a first light-shielding layer in a pixel area on the substrate,
the first transistor including:
a first polycrystalline silicon layer on the substrate;
a first insulating film on the first polycrystalline silicon layer;
a first gate electrode having a region overlapping the first polycrystalline silicon layer on the first insulating film;
a second insulating film and a third insulating film on the first gate electrode; and
a first source electrode and a first drain electrode electrically connected to the first polycrystalline silicon layer through openings in the second insulating film and the third insulating film,

the second transistor including:
an oxide semiconductor layer on the second insulating film;
the third insulating film on the oxide semiconductor layer;
a second gate electrode on the third insulating film;
a fourth insulating film on the second gate electrode; and
a second source electrode and a second drain electrode electrically connected to the oxide semiconductor layer through openings in the fourth insulating film,

wherein
the first light-shielding layer is provided between the first insulating film and the second insulating film and has a region overlapping the oxide semiconductor layer, and
one of the first source electrode and the first drain electrode is electrically connected to the one of the second source electrode and the second drain electrode.