Patent ID: 10928053

Abstract:
The invention provides a lighting device (100) comprising a plurality of light sources (10), a light guide plate (20), a rim (30), and an IR sensor (40), wherein: (i) the light sources (10) are configured to provide light source light (11), and wherein the light sources (10) are configured in an edge-lighting configuration with the light guide plate (20); (ii) the light guide plate (20) comprises a circumferential edge (22) of which at least part is configured as light incoupling face for the light source light (11), and a first face (21) of which at least part is configured as light outcoupling face; (iii) the rim (30) comprises the plurality of light sources (10) and the IR sensor (40); and (iv) the IR sensor (40) is configured to sense IR radiation (41) via the light guide plate (20).