| CPC H04N 25/50 (2023.01) [G01B 11/22 (2013.01); G01S 7/4814 (2013.01); G01S 7/4816 (2013.01); G01S 17/89 (2013.01); G06V 40/161 (2022.01); H04N 23/84 (2023.01); H04N 25/705 (2023.01); H04N 25/709 (2023.01); H04N 25/75 (2023.01)] | 18 Claims |
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1. A system, comprising:
a processor;
a light source controlled by the processor and configured to emit a light; and
an event based vision sensor controlled by the processor, wherein the event based vision sensor includes:
a plurality of pixels, wherein at least one of the plurality of pixels includes:
a photosensor configured to detect incident light;
first circuitry configured to output a first signal based on an output from the photosensor, wherein the first signal indicates a change of amount of incident light; and
a comparator configured to output a comparison result based on the first signal and at least one of a first reference voltage and a second reference voltage,
wherein the processor is configured to apply one of the first reference voltage and the second reference voltage to the comparator selectively based on an operation of the light source,
wherein when the first reference voltage is applied to the comparator, the light source emits light and the event based vision sensor stores on event data in memory, and
wherein when the second reference voltage is applied to the comparator, the light source ceases to emit light and the event based vision sensor stores off event data in the memory.
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5. A system, comprising:
an image sensor configured to output an image signal;
a light source configured to emit a light;
an event based vision sensor configured to output an event signal, the event based vision sensor including:
a plurality of pixels, wherein at least one of the plurality of pixels includes:
a photosensor configured to detect incident light; and
first circuitry that outputs a first signal based on an output from the photosensor, wherein the first signal indicates a change of amount of incident light; and
a comparator configured to output a comparison result based on the first signal and at least one of a first reference voltage and a second reference voltage;
a system controller configured to control the event based vision sensor and the light source synchronously; and
a processor configured to process the image signal and the event signal,
wherein the system controller applies the first reference voltage and the second reference voltage to the comparator selectively based on an operation of the light source,
wherein when the first reference voltage is applied to the comparator, the light source emits light and the event based vision sensor stores on event data in memory, and
wherein when the second reference voltage is applied to the comparator, the light source ceases to emit light and the event based vision sensor stores off event data in the memory.
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15. A method of driving a ranging system, the method comprising:
selectively applying, with a processor, one of a first reference voltage and a second reference voltage to a comparator based on an operation of a light source; and
comparing, with the comparator the one of the first reference voltage and the second reference voltage with a first signal output by circuitry of a pixel, wherein:
the light source is controlled by the processor and configured to emit a light,
the pixel is one of a plurality of pixels included within an event based vision sensor,
the pixel includes a photosensor configured to detect incident light and first circuitry that outputs the first signal based on an output from the photosensor, and
the first signal indicates a change of amount of incident light,
when the first reference voltage is applied to the comparator, the light source emits light and the event based vision sensor stores on event data in memory, and
when the second reference voltage is applied to the comparator, the light source ceases to emit light and the event based vision sensor stores off event data in the memory.
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