Light guide device, light guide assembly and display equipment
US12366696B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2025 |
| Grant date | Jul 22, 2025 |
| Priority date | — |
| Expiry date | Feb 28, 2045 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0125
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are a light guide device, a light guide assembly and a display equipment. The light guide device includes a substrate including two opposite surfaces and a sidewall connected between the two surfaces; a coupling-out pupil expansion region provided at the surface; and a reflection layer, wherein a reflection interface of the reflection layer is towards an interior of the substrate and is provided on a diffraction light path of the coupling-out pupil expansion region. The coupling-out pupil expansion region is configured to perform multiple diffraction light splits to coupling-in light coupled into the substrate, and the reflection interface is cooperated with the coupling-out pupil expansion region to reflect the light after multiple diffraction light splits through the coupling-out pupil expansion region and reflect the light through the coupling-out pupil expansion region for coupling-out imaging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.