LIGHTING DEVICE WITH LOCAL PHOTON SUPPLY AREA AND PHOTON DISTRIBUTION

The invention relates to a lighting device (DE), the lighting device includes electroluminescent diodes (D1-D4) and a flat light guide (GL), and the light guide includes a guiding unit (PG) arranged between an input surface (FE) and an output surface (FS). The input surface (FE) supplies photons to the guiding unit (PG), and the output surface (FS) sends the photons to the outside through guidance. The electroluminescent diodes (D1-D4) are all arranged to be opposite to input regions (ZE1-ZE4) defined in a supply region (ZA) of the input surface (FE), the supply region is opposite to the firstoutput region (ZS1) of the output surface (FS), the input region is configured to used for enabling received photons to be distributed in predefined angle sectors (SA1-SA4), so that luminous intensity decreasing progressively from a first output region (ZS1) is caused in a second output region (ZS2) of the output surface (FS), and the second output region is located beside the first output region(ZS1).