Time of flight-based systems operable for ambient light and distance or proximity measurements
US10295657B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2017 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Aug 29, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2007/4975
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A time of flight-based system is operable for ambient light measurements. A method of operation includes detecting, in at least one active demodulation detection pixel, a first particular wavelength and generating amplitude data of the first particular wavelength; and detecting, in at least one spurious reflection detection pixel, a second particular wavelength and generating amplitude data of the second particular wavelength. In a computational device that stores spectrum data corresponding respectively to a plurality of different ambient light source types, an ambient lighting condition is determined based on the amplitude data of the first particular wavelength, the amplitude data of the second particular wavelength and the spectrum data of a particular one of the ambient light source types associated with the amplitude data of the first particular wavelength and the amplitude data of the second particular wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.