Film-based lightguide with adhered component between fold region and extraction region

A device comprising:

• a film comprising a core layer, the film further comprising a major sheet area of the film bounded by edges of the film, the major sheet area comprising a light emitting region comprising light extracting features positioned to receive and extract light propagating by total internal reflection within the core layer out of the major sheet area;
• a minor sheet area of the film between the major sheet area and an array of strips, the array of strips extended from the minor sheet area of the film, and each strip of the array of strips is folded within a fold region and stacked;
• and
• a component including a frame adhered to the film between the fold region and the light emitting region and maintaining a relative position of each strip of the array of strips in the fold region.

A method of restraining a film, the method comprising:

• applying an adhesive layer on at least one side of the film comprising a core layer, the film further comprising a major sheet area of the film bounded by edges of the film, the major sheet area comprising a light extracting region positioned to receive and extract light propagating by total internal reflection within the core layer out of the major sheet area;
• forming an array of strips extending from a minor sheet area of the film, the minor sheet area positioned between the major sheet area and the array of strips;
• folding each strip of the array of strips within a fold region and stacking the array of strips;
• and
• adhering a component to the film between fold region and the light extracting region using the adhesive layer.