Film-based lightguide with stacked strips and light source emitting light into non-lateral edge surfaces of the strips

A light emitting device comprising:

• a light source;
• a lightguide formed from a film comprising a major sheet area of the film bounded by lateral edges of the film;
• and
• an array of coupling lightguides in the form of strips extended from a minor sheet area of the film, each coupling lightguide of the array of coupling lightguides is bent and stacked in a thickness direction,
• wherein the light source emits light into the array of coupling lightguides in the thickness direction through one or more non-lateral edge surfaces of one or more of the coupling lightguides.

A method of emitting light from a surface of a film, the method comprising:

• forming a film-based lightguide comprising an array of coupling lightguides in the form of strips extended from a minor sheet area of the film;
• stacking the coupling lightguides in a thickness direction of the coupling lightguides to form a stack;
• and
• positioning a light source to emit light into the array of coupling lightguides in the thickness direction through one or more non-lateral edge surfaces of one or more of the coupling lightguides.