CPC F21K 9/232 (2016.08) [G02B 6/0068 (2013.01)] | 14 Claims |
1. An optical structure for producing a decorative lighting effect in a lighting device, said optical structure comprising:
an optical element formed in one piece and comprising at least two openings;
an LED-filament comprising a substrate and a plurality of light sources arranged on said substrate, said substrate being at least partly made of a flexible material;
said LED filament comprises two or more portions;
wherein each of said openings is adapted to receive said LED-filament such that a portion of said LED-filament respectively extends through and is at least partly enclosed by a surrounding wall of said at least one opening such that said LED-filament is guided by and held in place by means of said at least one opening of the optical element and wherein light emitted from said LED-filament interacts with said optical element, and
wherein the two or more portions are arranged to respectively extends through respective two or more openings of said optical element.
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