Patent ID: 11388804

Abstract:
A lighting device (10) is disclosed that comprises a light mixing chamber (14) at least partially delimited by a first surface (30) carrying a plurality of light sources (28) spatially distributed across said first surface and a second surface (31) arranged to be illuminated by said light sources, said second surface comprising light transmissive regions (33) delimiting light exit areas (32) having a higher light transmissivity than the light transmissive regions, said light transmissive regions exhibiting isotropic luminance and light exit areas exhibiting anisotropic luminance when illuminated by said light sources. The lighting device (10) further comprises a controller (40) adapted to individually control said light sources and having a mode of operation in which the controller is adapted to vary the luminous output of a selection of said light sources as a function of time such that the isotropic luminance of the light transmissive regions is time-independent and the anisotropic luminance of at least some of the light exit areas is time-dependent during said mode of operation.