Patent ID: 8901691

Claim:
A touch sensing substrate comprising: a substrate; a first light sensing element on the substrate and configured to sense a first light, the first light sensing element comprises a first gate electrode, a first active pattern overlapping with the first gate electrode, a first source electrode partially overlapping with the first active pattern, and a first drain electrode partially overlapping with the first active pattern, the first gate electrode, the first active pattern, the first source electrode and the first drain electrode being disposed on the substrate; a second light sensing element on the substrate and configured to sense a second light, the second light sensing element comprises a second gate electrode, a second active pattern overlapping with the second gate electrode and comprising a material different from the first active pattern, a second source electrode partially overlapping with the second active pattern, and a second drain electrode partially overlapping with the second active pattern, the second gate electrode, the second active pattern, the second source electrode and the second drain electrode being disposed on the substrate; a first bias line connected to the first gate electrode and the second gate electrode; a first drain connection electrode connected to the first drain electrode through a first contact hole; a second drain connection electrode connected to the second drain electrode through a second contact hole; a second bias line connected to the first and second drain connection electrodes; a first source connection electrode connected to the first source electrode through a third contact hole; a second source connection electrode connected to the second source electrode through a fourth contact hole; a first switching element connected to the first source connection electrode; and a second switching element connected to the second source connection electrode.