US 12,217,599 B2
Emergency lighting element
Wolfgang Sutter, Halstenbek (DE)
Assigned to LUFTHANSA TECHNIK AG, Hamburg (DE)
Appl. No. 18/563,395
Filed by LUFTHANSA TECHNIK AG, Hamburg (DE)
PCT Filed May 20, 2022, PCT No. PCT/EP2022/063748
§ 371(c)(1), (2) Date Nov. 22, 2023,
PCT Pub. No. WO2022/248358, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 10 2021 113 490.0 (DE), filed on May 26, 2021.
Prior Publication US 2024/0221478 A1, Jul. 4, 2024
Int. Cl. G08B 7/06 (2006.01); B60Q 3/46 (2017.01); F21K 9/64 (2016.01); F21K 9/68 (2016.01); F21V 9/32 (2018.01); F21V 13/08 (2006.01); F21V 23/00 (2015.01); F21V 23/02 (2006.01); F21V 31/00 (2006.01); B64D 45/00 (2006.01); F21W 106/00 (2018.01); F21W 107/30 (2018.01); F21Y 105/16 (2016.01); F21Y 115/10 (2016.01); H02J 50/00 (2016.01)
CPC G08B 7/066 (2013.01) [B60Q 3/46 (2017.02); F21K 9/64 (2016.08); F21K 9/68 (2016.08); F21V 9/32 (2018.02); F21V 13/08 (2013.01); F21V 23/005 (2013.01); F21V 23/023 (2013.01); F21V 31/00 (2013.01); B64D 45/00 (2013.01); B64D 2045/007 (2013.01); F21W 2106/00 (2018.01); F21W 2107/30 (2018.01); F21Y 2105/16 (2016.08); F21Y 2115/10 (2016.08); G08B 7/062 (2013.01); H02J 50/005 (2020.01)] 15 Claims
OG exemplary drawing
 
1. An emergency lighting element, comprising:
a planar, electrically operable radiation source for planar emission of electromagnetic radiation at a front side of the radiation source, wherein the radiation source is configured to emit electromagnetic radiation in the UV range;
a long-afterglow layer over a whole area on the front side of the radiation source; and
a UV filter tuned to the radiation of the radiation source is disposed on a side of the long-afterglow layer facing away from the radiation source,
wherein a penetration depth into the long-afterglow layer for radiation emitted by the radiation source corresponds at least to a thickness of the long-afterglow layer,
wherein the long-afterglow layer comprises phosphorescent material, an absorption spectrum of the long-afterglow layer at least partly overlaps an emission spectrum of the radiation source and an emission spectrum of the long-afterglow layer lies substantially in a visible range, and
wherein emission of visible light by the emergency lighting element is effected solely by the long-afterglow layer.