Method and arrangement for influencing light propagation directions
US11829051B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2021 |
| Grant date | Nov 28, 2023 |
| Priority date | — |
| Expiry date | Mar 26, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8515
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for influencing light propagation directions of a light-emitting surface emitting light of a first wavelength range in a first direction and light of a second and wavelength range in a second direction. The wavelength ranges have a wavelength-dependent spectral radiance and differ in a peak wavelength. A switchable color converter is arranged in front of the light-emitting surface. The method includes the steps of a) deactivating the color converter for a first mode so that the second-wavelength range is transmitted and the first-wavelength range is absorbed, such that light from the light-emitting surface is only perceptible from the second direction, or b) activating the color converter for a second mode so that light of the first-wavelength range is converted into light of the second-wavelength range and light of the second-wavelength range is transmitted, such that light from the light-emitting surface is perceptible from both directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.