US 11,837,014 B2
Detection device
Tadayoshi Katsuta, Tokyo (JP)
Assigned to Japan Display Inc., Tokyo (JP)
Filed by Japan Display Inc., Tokyo (JP)
Filed on Apr. 21, 2022, as Appl. No. 17/725,766.
Application 17/725,766 is a continuation of application No. PCT/JP2020/041267, filed on Nov. 4, 2020.
Claims priority of application No. 2019-201045 (JP), filed on Nov. 5, 2019.
Prior Publication US 2022/0262158 A1, Aug. 18, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06V 40/13 (2022.01)
CPC G06V 40/1318 (2022.01) [G06V 40/1329 (2022.01)] 6 Claims
OG exemplary drawing
 
1. A detection device comprising:
a sensor in which a plurality of detection elements each comprising a photoelectric conversion element are arranged in a detection region;
a drive circuit configured to supply a plurality of drive signals to the detection elements; and
a detection circuit configured to process a detection signal output from each of the detection elements,
wherein each of the detection elements comprises:
a source follower transistor configured to output a signal corresponding to an electric charge generated in the photoelectric conversion element; and
a read transistor configured to read an output signal of the source follower transistor and output the detection signal, and
wherein a potential obtained by superimposing a threshold voltage of the source follower transistor and a voltage drop caused by on-resistance of the read transistor on a reset potential serving as a reference value for a voltage variation amount of the detection signal is set as an initial value of a potential applied to the photoelectric conversion element.