Image sensor packages with tunable polarization layers
US11036067B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2019 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Dec 16, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133567
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Imaging systems may include tunable polarization filters. A tunable polarization filter may be integrated directly into an image sensor package. For example, the tunable polarization filter may serve as cover glass for the image sensor package. Tunable polarization package glass may be incorporated into image sensor packages that have air gaps between the image sensor and the cover glass or that have transparent adhesive between the image sensor and the cover glass. The tunable polarization layer may be controlled at a global level, at a sub-array level, or at a pixel level. In some cases, the tunable polarization layer may be a tunable polarization filter. In this example, the direction of the polarization filter is tuned. In other cases, the tunable polarization layer may be a tunable polarization rotator. In this example, the tunable polarization layer selectively rotates the polarization of light that passes through the tunable polarization layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.