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US 11,695,026 B2Granted
Detection device
AssigneeJapan Display Inc.
InventorTadayoshi Katsuta
Life of this patent
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Abstract
A detection device includes a sensor area 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.
Claims8
A detection device comprising:
- a sensor area 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 by the photoelectric conversion element;
- a read transistor configured to read the output signal of the source follower transistor, and output the detection signal;
- a first reset transistor configured to supply or interrupt a reference potential to a cathode of the photoelectric conversion element;
- a second reset transistor configured to electrically couple or decouple between an anode of the photoelectric conversion element and a coupling point between the source follower transistor and the read transistor;
- and
- a cancel transistor configured to supply or interrupt the reference potential to the anode of the photoelectric conversion element, and
- a potential obtained by superimposing at least a threshold voltage of the source follower transistor on the reference potential is set as an initial value of a potential applied to the cathode of the photoelectric conversion element in a reset period.
9 more elements
A detection device comprising:
- a sensor area 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 by the photoelectric conversion element;
- a read transistor configured to read the output signal of the source follower transistor, and output the detection signal;
- a first reset transistor configured to supply or interrupt a reference potential to a cathode of the photoelectric conversion element;
- a second reset transistor configured to electrically couple or decouple between an anode of the photoelectric conversion element and an output of the read transistor;
- and
- a cancel transistor configured to supply or interrupt the reference potential to the anode of the photoelectric conversion element, and
- 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 the reference potential is set as an initial value of a potential applied to the cathode of the photoelectric conversion element in a reset period.
9 more elements
Dependencies are inferred from the claim text.