US 11,703,627 B1
Optically functionally multilayer structure suitable for large area illumination and related method of manufacture
Antti Keränen, 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 Sep. 15, 2022, as Appl. No. 17/945,247.
Application 17/945,247 is a continuation of application No. 17/856,959, filed on Jul. 2, 2022, granted, now 11,500,142.
This patent is subject to a terminal disclaimer.
Int. Cl. F21V 8/00 (2006.01); G02B 5/08 (2006.01)
CPC G02B 6/0031 (2013.01) [G02B 6/004 (2013.01); G02B 6/0021 (2013.01); G02B 6/0036 (2013.01); G02B 6/0041 (2013.01); G02B 6/0043 (2013.01); G02B 6/0051 (2013.01); G02B 6/0055 (2013.01); G02B 6/0061 (2013.01); G02B 6/0065 (2013.01); G02B 6/0068 (2013.01); G02B 6/0073 (2013.01); G02B 6/0083 (2013.01); G02B 5/0883 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An integrated optically functional multilayer structure suitable for large area dynamic illumination, comprising:
a flexible substrate film arranged with a circuit design comprising at least a number of electrical conductors;
a plurality of top-emitting, bottom-installed light sources provided upon a first side of the substrate film to internally illuminate at least portion of the structure for external perception via associated outcoupling areas, wherein for each light source of the plurality of light sources there is an optically transmissive plastic layer produced upon the first side of the substrate film, said plastic layer at least laterally surrounding the light source;
a reflector design comprising at least one material layer provided at least upon the light source and configured to reflect the light emitted by the light source and incident upon the reflective layer towards the plastic layer; and
at least one further material layer, stacked and in contact with the reflector design, said at least one further material layer having a lower refractive index than the plastic layer, said at least one further material layer and said plastic layer being optically connected to redirect at least part of the light emitted by at least one light source of the plurality of light sources, propagated within the plastic layer and incident upon the at least one further material layer back into the plastic layer by total internal reflection, said at least one further material layer including optically clear adhesive or primer.