US 11,817,534 B1
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 Jul. 2, 2022, as Appl. No. 17/856,958.
Int. Cl. H01L 33/60 (2010.01); H01L 33/62 (2010.01); H01L 25/075 (2006.01); H01L 33/00 (2010.01)
CPC H01L 33/60 (2013.01) [H01L 25/0753 (2013.01); H01L 33/005 (2013.01); H01L 33/62 (2013.01); H01L 2933/0058 (2013.01); H01L 2933/0066 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An integrated optically functional multilayer structure, comprising:
a flexible, optionally 3D-formable and thermoplastic, substrate film arranged with a circuit design comprising at least a number of electrical conductors additively printed on the substrate film;
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, optionally of thermoplastic material, produced upon the first side of the substrate film, said plastic layer at least laterally surrounding, optionally also at least partially covering, the light source, the substrate film optionally comprising material or material layer same as that of the plastic layer or at least having a similar or lower refractive index therewith;
a reflector design comprising at least one material layer, said reflector design being configured to reflect, optionally dominantly specularly, the light emitted by the light source and incident upon the reflector design optionally towards the plastic layer, the reflector design including a first portion and at least one second portion, the first portion aligned substantially perpendicular to a lateral direction of the structure, the at least one second portion aligned substantially parallel to the lateral direction and vertically offset from the first portion by at least one light guide structure disposed between, and discrete from, the first portion and the at least one second portion; and
a light outcoupling area on the plastic layer, wherein the light source is located in the lateral direction of the structure between the first portion of the reflector design aligned substantially perpendicular to the lateral direction, and the light outcoupling area, and the light source has been aligned in terms of its primary emission direction towards the portion of the reflector design.