High performance backlight device using photonic integrated circuits
US12271078B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2022 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Aug 9, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/38
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Embodiments of the present disclosure relate to a high performance backlight device with photonic integrated circuits. The backlight device includes a light source assembly, a multi-mode slab waveguide, and an out-coupling assembly. The light source assembly includes one or more light sources that generate light in accordance with emission instructions, and a de-speckling mechanism that conditions the generated light to mitigate speckle. The multi-mode slab waveguide in-couples the conditioned light and expands the in-coupled conditioned light in two dimensions to form a homogenous area of conditioned light within a region of the multi-mode slab waveguide. The out-coupling assembly out-couples the conditioned light from the region in a direction normal to the two dimensions, wherein a light modulation layer forms an image from the out-coupled conditioned light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.