Reflective display comprising coupling lightguides folded at different fold angles
US12262154B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2021 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Apr 28, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133616
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In some aspects, a display comprises a reflective spatial light modulator, a light source, and a film-based lightguide having an array of coupling lightguides in a form of strips of the film extending from and continuous with a lightguide region of the film. The coupling lightguides are folded and stacked behind the reflective spatial light modulator along fold lines oriented at different orientation angles. In some embodiments, the coupling lightguides comprise lateral edges with curved portions. In some embodiments, the coupling lightguides are tapered. In some embodiments, the reflective spatial light modulator comprises an active area in a shape of a polygon with more than four sides or an active area defined by a boundary with a circular, semi-circular, or arcuate portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.