US 11,946,613 B2
Translucent metallised design surface
Thomas Grimm, Cologne (DE); Rainer Hagen, Leverkusen (DE); and Ulrich Grosser, Kürten (DE)
Assigned to Covestro Intellectual Property GmbH & Co. KG, Leverkusen (DE)
Appl. No. 17/642,363
Filed by Covestro Intellectual Property GmbH & Co. KG, Leverkusen (DE)
PCT Filed Sep. 21, 2020, PCT No. PCT/EP2020/076241
§ 371(c)(1), (2) Date Mar. 11, 2022,
PCT Pub. No. WO2021/058420, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 19199732 (EP), filed on Sep. 26, 2019.
Prior Publication US 2022/0333759 A1, Oct. 20, 2022
Int. Cl. F21S 43/20 (2018.01); B32B 27/08 (2006.01); F21V 3/06 (2018.01)
CPC F21S 43/26 (2018.01) [B32B 27/08 (2013.01); F21V 3/062 (2018.02); B32B 2307/412 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A lighting unit, comprising the following elements in this sequence
a transparent thermoplastic layer (300) having a visible side and a side facing away from the visible side,
wherein
the transparent layer (300) has a transmittance Ty of ≥10%, determined in accordance with DIN ISO 13468-2:2006 (D65, 10°), and
has a 3-dimensionally structured surface on the side facing away from the visible side,
a metal layer (200) directly on the transparent layer (300) on the side facing away from the visible side, wherein the metal layer (200) has a transmittance Ty of ≥4%,
determined in accordance with DIN ISO 13468-2:2006 (D65, 10°),
wherein the combined transmittance Ty of the metal layer (200) with the transparent layer (300), determined in accordance with DIN ISO 13468-2:2006 (D65, 10°), is at least 3.0%,
a diffuser layer (100), which is at a distance of ≤5 mm from the metal layer and has a transmittance Ty of at least >50%, determined in accordance with DIN ISO 13468-2:2006 (D65, 10°), and a half-value angle of 10°≤<x≤50°, determined in accordance with DIN 5036:1978 (based on light intensity),
a light source (600), which conveys information and is at a distance from the diffuser layer of <80 cm.