ILLUMINATED MULTILAYER STRUCTURE WITH EMBEDDED LIGHT SOURCES

Multilayer assembly (100, 200, 300) for an electronic device comprises a substrate film (202) configured to accommodate electronics (210, 212, 214) on at least first side thereof, said film having the first side and a second side, a number of light sources (214) on the first side of the substrate film (202) and configured to emit light of predetermined frequency or frequency band, a plastic lightguide layer (204) molded onto the first side of the substrate film (202) and at least partially embedding the light sources (214), the plastic lightguide layer (204) being of optically at least translucent material, wherein the plastic lightguide layer (204) is configured to transmit light emitted by the embedded light sources (214) so that the transmitted light propagates within the lightguide layer (204) and is outcoupled therefrom via an outer surface thereof substantially opposite to the embedded light sources, and a masking layer (106) provided on the outer surface of the plastic lightguide layer (204), containing substantially opaque material to block external view of at least some internals of the multilayer structure including the light sources (214), wherein the masking layer (106) defines a window (116, 116A, 116B) for letting the light emitted by the embedded light sources (214) and propagated within the plastic lightguide layer to pass through the masking layer (106) towards the environment, the light sources (214), masking layer (106) and related window (116, 116A, 116B) being mutually configured such that there is no direct line-of-sight (LOS) path at least within a selected viewing angle (220) from outside the assembly to the light sources (214) through the window. A method of manufacture is presented.