Lighting systems incorporating flexible light sheets deformable to produce desired light distributions

摘要

In accordance with certain embodiments, lighting systems include flexible light sheets having light-emitting elements with first luminous intensity distributions disposed thereover, and the light sheets are curved or folded to produce a second luminous intensity distribution different from the first luminous intensity distribution.

主权项

1. An illumination device comprising:
a housing; a flexible light sheet that is substantially planar in an unfolded and uncurved configuration, the light sheet comprising (i) a flexible substrate having first and second opposed surfaces, (ii) a plurality of light-emitting elements disposed over at least one of the first or second surfaces of the substrate, and (iii) a plurality of conductive traces disposed on the substrate and electrically interconnecting the plurality of light-emitting elements; and one or more spacers disposed between the light sheet and the housing, wherein (i) the light-emitting elements each have a first luminous intensity distribution, (ii) at least a portion of the flexible substrate not covered by the light-emitting elements is reflective for a wavelength of light emitted by the light-emitting elements, (iii) the light sheet is curved and/or folded to produce a second luminous intensity distribution emitted by the illumination device, different from the first luminous intensity distribution, and (iv) the curved and/or folded light sheet is disposed at least partially within the housing.