Abstract: An event can be detected quickly and accurately regardless of surrounding brightness. An imaging device includes: a photoelectric conversion element that photoelectrically converts incident light and generates an electrical signal corresponding to incident light intensity; a detection unit that outputs a detection signal indicating whether or not a change amount of the electrical signal exceeds a predetermined threshold value; and a threshold value selection circuit that selects the threshold value from among a plurality of threshold value candidates according to a magnitude of the electrical signal.

Abstract: An imaging device capable of reducing erroneous detection of a luminance change is provided. According to one embodiment of the present disclosure, there is provided an imaging device including: a photoelectric conversion element configured to generate an optical current acquired by photoelectrically converting incident light; a current-voltage conversion circuit configured to convert the optical current into a voltage signal; a threshold monitoring circuit configured to monitor the optical current; a plurality of capacitance elements including a variable capacitance element of which a capacitance value changes on the basis of a monitoring result of the threshold monitoring circuit; and an event detecting circuit configured to detect a luminance change of the incident light on the basis of a result of comparison between an amplified voltage acquired by amplifying the voltage signal on the basis of a capacitance ratio of the plurality of capacitance elements and a threshold voltage.

Abstract: An event can be detected quickly and accurately regardless of surrounding brightness. An imaging device includes: a photoelectric conversion element that photoelectrically converts incident light and generates an electrical signal corresponding to incident light intensity; a detection unit that outputs a detection signal indicating whether or not a change amount of the electrical signal exceeds a predetermined threshold value; and a threshold value selection circuit that selects the threshold value from among a plurality of threshold value candidates according to a magnitude of the electrical signal.

Abstract: A decline in image quality that is caused by a variation of a gain in an amplification circuit is suppressed. The amplification circuit includes an amplification transistor, a cascode transistor, and a control circuit. The amplification transistor amplifies an input signal. The cascode transistor is configured to, in a case where a drain-source voltage between a drain and a source is higher than a predetermined voltage, supply a substantially-constant drain current to a reference potential line with a predetermined reference potential via the amplification transistor. Further, the control circuit is configured to, in a case where an initialization instruction is issued, control the drain-source voltage to be a value higher than the predetermined voltage.