Lightguide plate

A composite light guide is disclosed. The composite light guide comprises a light guide layer having a first face and a second opposite face, and an edge portion configured to receive input light, wherein at least one of the first face and the second face is an output face. The composite light guide 5 comprises a plurality of low-scattering photo-luminescent elements in optical contact with the light guide layer and a spatially inhomogeneous out-coupling layer comprising a plurality of out-coupling structures disposed at least one of the first face and the second face. The plurality of low-scattering photo-luminescent elements comprises at least one element capable of absorbing light within a first wavelength range and emitting light within a second, different wavelength range. Each of the 10 plurality of out-coupling structures has a dimension which is substantially larger than wavelengths in the first wavelength range and wavelengths in the second wavelength range.

Patent Publication Number: EP3695163

Year filing: 2020

Year approval: 2021

Year publication: 2020

Status: Requested

Technology domains: Electrical machinery, apparatus, energy, Semiconductors, Micro-structure and nano-technology

Validated for IOF-key: Yes

Attributed to: Associatie KULeuven, Associatie Universiteit Gent