Abstract: A light-guiding assembly for vehicle roofs has a plurality of glass sheets (1, 2) with an interlayer (3) of a polymeric laminating material interposed. The light-guiding assembly has light-coupling means (5) for coupling light into the light-guiding assembly. According to the invention, the light coupled into the interlayer (3) is substantially guided through the interlayer (3). Preferably, the refractive index of the interlayer is higher than the refractive index of the glass sheets. Preferably, refractive layers (8, 9) of a material with a refractive index lower than the refractive index of the interlayer (3) are provided adjacent the interlayer between the respective glass sheets (1, 2) and the interlayer (3). Preferably, the light-guiding assembly is provided with a recess (10), the recess (10) being adapted to receive the light-coupling means (5).

Abstract: A luminescent body is described that comprises a optical waveguide plate, a UV light source, and means for coupling the UV light into the optical waveguide plate and in which the optical waveguide plate is provided with a covering layer that contains one or more phosphors that are either applied directly or may be embedded in spherical particles of synthetic resin material. These phosphors convert UV light of a wavelength from 300 to 400 nm into visible light of a wavelength from 420 to 480 nm. The covering layer has a thickness from 10 to 5000 nm and exhibits a light reflection of <20%.

Abstract: The invention relates to a light emitting panel (1) to be mounted against the roof of the passenger compartment of a vehicle, comprising a transparent plate-like light guiding member (2) whereby light is coupled in through one or more side surfaces (21) of the member (2) and light is coupled out through the lower surface(22) of the member (2) for lighting said compartment. According to the invention a light transmitting cover (200) is attached to said lower surface (22) of the member (2).