Optically functionally multilayer structure suitable for large area illumination and related method of manufacture

A method for manufacturing an integrated optically functional multilayer structure, comprising:

• obtaining a flexible substrate film provided with a circuit design comprising at least a number of electrical conductors;
• arranging a plurality of top-emitting, bottom-installed light sources provided upon a first side of the substrate film;
• producing for each light source of the plurality of light sources an optically transmissive plastic layer upon the first side of the substrate film, said plastic layer at least laterally surrounding or neighbouring, the light source;
• and
• providing a reflector design comprising at least one material layer configured to reflect the light emitted by the plurality of light sources and incident upon the reflector design towards the plastic layer, wherein the reflector design at least locally comprises a material stack of a plurality of superimposed material layers having at least two mutually different refractive indexes.

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 a 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
• a circuit board hosting at least one light source of the plurality of light sources and provided on the substrate film,
• said circuit board further hosting a lightguide of optically transmissive material covering the at least one light source, a wall structure of optically transmissive material arranged at the periphery of the circuit board, and/or an air gap or fill between the wall structure and the lightguide, and/or said circuit board further comprising a number of holes for enabling light transmission therethrough.