Image sensing device and operating method thereof
US11675079B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2021 |
| Grant date | Jun 13, 2023 |
| Priority date | — |
| Expiry date | Jun 21, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/705
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensing device includes an optical emitter outputting a modulated signal to a target object; an optical receiver generating, according to a phase control signal, pixel signals corresponding to a reflected signal from the target object; an image processor calculating a depth phase based on the pixel signals and compensating for the depth phase according to a phase offset signal to output a depth information signal; a driving control circuit generating the phase control signal corresponding to a phase of the modulated signal and setting an initial phase difference between the modulated signal and the phase control signal according to the phase offset signal; and an offset calculating circuit setting a plurality of reference phases, selecting a reference phase closest to the depth phase among the set reference phases and generating the phase offset signal representing a phase difference between the selected reference phase and the depth phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.