Patent ID: 9731840
Date: 2017-08-15
CPC Classifications: B64D,F21V,F21Y,G02B,G09F

Claim:
1. An aircraft interior light unit having a light output over an extended light emission area, comprising: a flat light distribution body having a front surface, through which the light output is coupled out, and a back surface, wherein at least one of the front surface and the back surface of the flat light distribution body has a plurality of surface irregularities; at least one general illumination LED positioned at a lateral outside of the flat light distribution body, with light emitted by the at least one general illumination LED being coupled into the flat light distribution body and being propagated within the flat light distribution body via total internal reflection at the front and back surfaces and with light from the at least one general illumination LED being re-directed at the plurality of surface irregularities for being coupled out of the flat light distribution body and for providing a general illumination over the extended light emission area; a plurality of signalling LEDs being arranged outside of the flat light distribution body and facing towards the back surface of the flat light distribution body; and a translucent panel arranged between the back surface of the flat light distribution body and the plurality of signalling LEDs, with light emitted from the plurality of signalling LEDs passing through the translucent panel and the flat light distribution body, forming high luminance spots in the light output.