Image sensor and image sensing method judging whether a digital sensing signal is abnormal
US12273644B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2023 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Dec 22, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/811
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor and an image sensing method are provided. A readout circuit outputs a first digital sensing signal according to a floating diffusion node voltage of a first pixel circuit reset after a reset stage and a floating diffusion node voltage of a second pixel circuit reset after the reset stage during a reset signal readout period. The readout circuit outputs a second digital sensing signal according to a sensing result of the first pixel circuit and the floating diffusion node voltage of the second pixel circuit reset after the same reset stage during a sensing signal readout period. The image processing circuit judges whether a digital number of at least one of the first digital sensing signal and the second digital sensing signal is abnormal to decide to keep an original digital number, directly set a pixel value, or reset the second digital sensing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.