Patent ID: 8414154

Claim:
A lighting device for general illumination comprising: two or more bidirectional light sheets, each bidirectional light sheet being planar and comprising: a first substrate comprising a first light emitting surface, a second substrate comprising a second light emitting surface opposing the first light emitting surface, a plurality of first non-packaged light emitting diode (LED) dies, and a plurality of second non-packaged LED dies, the first and second non-packaged LED dies being disposed between the first and second substrates such that during operation of the lighting device a peak intensity of light emitted by the first non-packaged LED dies is output from the first light emitting surface in a first direction, and a peak intensity of light emitted by the second non-packaged LED dies is output from the second light emitting surface in a second direction different from the first direction, a plurality of conductors configured to provide power to the first and second non-packaged LED dies, the first and second non-packaged LED dies connected to the conductors without wires, the conductors formed on at least one of the first and second substrate; and a support for affixing the two or more planar bidirectional light sheets to a ceiling, the support comprising a planar base, wherein each of the two or more planar bidirectional light sheets has an edge affixed to the planar base, such that the first and second light emitting surfaces of at least one of the planar bidirectional light sheets are non-parallel to the ceiling, and an angle formed by each of the two or more planar bidirectional light sheets with respect to a surface normal of the planar base is individually adjustable.