Proximity sensor having array of geiger mode avalanche photodiodes for estimating distance of an object to the array based on at least one of a dark current and a rate of current spikes generated in dark conditions
US9411049B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2014 |
| Grant date | Aug 9, 2016 |
| Priority date | — |
| Expiry date | Jan 30, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A proximity sensor may include an array of Geiger mode avalanche photodiodes, each including an anode contact and a cathode contact. A common cathode contact may be coupled to the cathode contacts of the array to define a first connection lead at a back side of the array. A common anode collecting grid contact may be coupled to the anode contacts of the array to define a second connection lead of the array. Circuitry may be coupled with the first and second connection leads and configured to sense at least one of a dark current and a rate of current spikes generated in dark conditions, and generate an output signal representing an estimated distance of an object from the array upon the sensing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.