Imaging system with time-of-flight sensing
US12123952B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2020 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Aug 23, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/77
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A time-of-flight (TOF) sensing system may include an illumination module and a sensor module. The illumination module may emit light having a reduced illumination duty cycle such as a high peak power and low width illumination pulse. The emitted light may reflect off of one or more objects as reflected light. The sensor module may include pixels operable based on a sensor modulation signal to generated image charge portions in response to the reflected light. The sensor modulation signal may be selectively suppressed after a period of time corresponding to a distance of interest. Processing circuitry in the TOF sensing system may obtain TOF information based on a phase difference between the emitted light and the image charge portions determined by cross-correlation data. By using the illumination pulse and the selective sensor modulation suppression, TOF sensing may exhibit reduced aliasing issues and improved ambient light rejection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.