Waveguides with light absorbing films and processes for forming the same
US12130439B2 · kind B2 · utility
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23References
16Claims
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Key dates
| Filing date | Sep 23, 2022 |
| Grant date | Oct 29, 2024 |
| Priority date | — |
| Expiry date | Sep 23, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In some embodiments, a display device includes one or more waveguides having a vapor deposited light absorbing film on edges of the waveguide to mitigate ghost images. In some embodiments, the film is formed directly on the edge of the waveguide by a vapor deposition, such as an evaporative deposition process. In some embodiments, the light absorbing films may comprise carbon, for example carbon in the form of one or more allotropes of carbon, such as fullerenes, or black silicon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.