Patent · US Active

Direct-light generator for sun-sky-imitating illumination devices

US12228279B2 · kind B2 · utility

0Cited by

2References

22Claims

0Family size

Assignee

CoeLux S.r.l. · IT

Inventors

Antonio Lotti · Varese, IT
Chen Li · Jena, DE
Peter Schreiber · Jena, DE
Bernd Hofer · Pettenbach, AT

Key dates

Filing date	Mar 26, 2020
Grant date	Feb 18, 2025
Priority date	—
Expiry date	Oct 8, 2041

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF21Y2115/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The present disclosure is directed to a direct-light generator for sun-sky-imitating illumination devices configured for generating natural light similar to that from the sun and the sky The generator includes a first emitting surface and an array of light-emitting devices configured to generate from a primary light a direct light which exits the first emitting surface along a direct-light direction. The direct light exiting the first emitting surface has a luminance profile which has a narrow peak in the angular distribution around the direct-light direction and is uniform across the first emitting surface. Each light-emitting device includes a light emitter having an emitting surface and at least a pair of collimation lenses illuminated by the light emitter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.