Calibration circuitry and method for a time of flight imaging system
US9720076B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2014 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Nov 26, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/017
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A time of flight imaging system includes a light source coupled to emit light pulses to an object in response a light source modulation signal generated in response to a reference modulation signal. Each pixel cell of a time of flight pixel cell array is coupled to sense light pulses reflected from the object in response a pixel modulation signal. A programmable pixel delay line circuit is coupled to generate the pixel modulation signal with a variable pixel delay programmed in response to a pixel programming signal. A control circuit is coupled to receive pixel information from the time of flight pixel array representative of the sensed reflected light pulses. The control circuit is coupled to vary the pixel programming signal during a calibration mode to synchronize the light pulses emitted from the light source with the pulses of the pixel modulation signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.