US 12,130,005 B2
Optically functional multilayer structure and related method of manufacture
Antti Keränen, Oulunsalo (FI); Sami Torvinen, Oulunsalo (FI); Tero Heikkinen, Oulunsalo (FI); Pasi Korhonen, Oulunsalo (FI); Pälvi Apilo, Oulunsalo (FI); Mikko Heikkinen, Oulunsalo (FI); Jarmo Sääski, Oulunsalo (FI); Paavo Niskala, Oulunsalo (FI); Ville Wallenius, Oulunsalo (FI); Heikki Tuovinen, Oulunsalo (FI); Janne Asikkala, Oulunsalo (FI); Taneli Salmi, Oulunsalo (FI); Suvi Kela, Oulunsalo (FI); Outi Rusanen, Oulunsalo (FI); Johanna Juvani, Oulunsalo (FI); Mikko Sippari, Oulunsalo (FI); Tomi Simula, Oulunsalo (FI); Tapio Rautio, Oulunsalo (FI); Samuli Yrjänä, Oulunsalo (FI); Tero Rajaniemi, Oulunsalo (FI); Simo Koivikko, Oulunsalo (FI); Juha-Matti Hintikka, Oulunsalo (FI); Hasse Sinivaara, Oulunsalo (FI); Vinski Bräysy, Oulunsalo (FI); Olimpia Migliore, Oulunsalo (FI); and Juha Sepponen, Oulunsalo (FI)
Assigned to TACTOTEK OY, Oulunsalo (FI)
Filed by TactoTek Oy, Oulunsalo (FI)
Filed on Jun. 22, 2023, as Appl. No. 18/339,427.
Application 18/339,427 is a continuation in part of application No. 17/856,958, filed on Jul. 2, 2022, granted, now 11,817,534.
Prior Publication US 2024/0003516 A1, Jan. 4, 2024
Int. Cl. F21V 7/28 (2018.01); F21V 7/00 (2006.01); H05K 1/02 (2006.01); H05K 1/18 (2006.01); F21V 7/10 (2006.01); F21V 8/00 (2006.01)
CPC F21V 7/00 (2013.01) 11 Claims
OG exemplary drawing
 
1. An integrated optically functional multilayer structure, comprising:
a flexible, substrate film arranged with a circuit design comprising at least a number of electrical conductors;
a light source provided upon a first side of the substrate film to internally illuminate at least portion of the structure for external perception;
an optically transmissive plastic layer, provided upon the first side of the substrate film, said plastic layer at least laterally surrounding or neighbouring, the light source, the substrate film; and
a number of printed, outcoupling elements of spatially mutually varying density of incidence, thickness and/or other dimensions, upon the plastic layer,
the density of incidence, thickness and/or one or more other dimensions of the outcoupling elements increasing with distance from the light source to respectively enhance outcoupling with distance.