Abstract: A lighting device comprises a carrier having a radially outwardly facing mounting surface and an inner cavity radially within the outer mounting surface. Solid state lighting devices are mounted on the outer mounting surface and a driver is housed in the inner cavity. A ring shaped optical unit defines a light output region of the lighting device and is mounted around the carrier. An outer housing reflects light from the arrangement of solid state lighting devices to the ring shaped optical unit. This provides a compact arrangement, in which the driver, the heat sink (implemented by the carrier), and the solid state lighting arrangement are essentially in a plane. This is possible by providing a ring of light sources facing radially outwardly, with the driver mounted radially inside the ring. The radial light output is converted to a light output with a desired direction and beam shape by the optical unit.

Abstract: Disclosed is a luminaire (1) comprising a circular light guide (10), the light guide comprising an edge portion (11) in between a first major surface (15) and a second major surface (17), at least part (16) of the first major surface guide tapering in a direction away from said edge portion; a plurality of solid state lighting elements (40) arranged along said edge portion; and a plurality of outcoupling elements (30) arranged in a pattern on the second major surface of the circular light guide. The luminaire (1) may further include a controller (50) for individually controlling the solid state lighting elements (40) such as to configure the luminous output, e.g. the beam profile, of the luminaire.

Abstract: The present invention relates to a louvre lighting unit which contains a plurality of louvre cells for beam shaping the lighting unit light. The plurality of louvre cells comprises a plurality of n subsets, each comprising a respective plurality of m louvre cells. The louvre cells of each subset are configured as a domain of adjoining louvre cells, wherein a respective plurality of k louvre cells within each domain have mutually differing louvre cell cross-sections.

Abstract: The invention provides a lighting unit (1000) comprising a light mixing chamber (100) defined by faces (110) and an edge face (130), wherein a height (H) of the light mixing chamber (100) defined by a distance between the faces (110) is smaller than a first length (L1) of the light mixing chamber (100), wherein the lighting unit comprises a plurality of light sources (10) configured to provide light source light (11) in the light mixing chamber (100), wherein at least one of the faces (110) comprises a plurality of chamber openings (141) for escape of at least part of the light source light (11) from the light mixing chamber (100), wherein the lighting unit (1000) further comprises a plurality of beam shaping elements (150), with each beam shaping element (150) configured downstream from a corresponding chamber opening (141, and wherein the beam shaping elements (150) comprise reflectors (200).

Abstract: A luminaire comprises a light guide having light outcoupling elements at one side and a flat light output surface at the other side, which is visible in use of the luminaire. An array of solid state lighting elements is arranged around the edge of the light guide facing the general light output direction. A respective reflector is associated with each solid state lighting element for reflecting light into the light guide. By providing the lighting elements all facing the general light output direction, they can be formed as a single unit, or as a small number of sub-units, thereby simplifying the manufacture. The design of the reflectors, the positioning of the lighting elements, and the design of the light outcoupling elements together may be used to create an asymmetrical light output beam shape. Actuation of different lighting elements may be used to provide different asymmetric light outputs.

Abstract: Disclosed is a luminaire (1) comprising a circular light guide (10), the light guide comprising an edge portion (11) in between a first major surface (15) and a second major surface (17), at least part (16) of the first major surface guide tapering in a direction away from said edge portion; a plurality of solid state lighting elements (40) arranged along said edge portion; and a plurality of outcoupling elements (30) arranged in a pattern on the second major surface of the circular light guide. The luminaire (1) may further include a controller (50) for individually controlling the solid state lighting elements (40) such as to configure the luminous output, e.g. the beam profile, of the luminaire.

Abstract: The invention provides a lighting unit (1000) comprising (i) a plurality of light sources (10) for generation of lighting unit light (1001), and (ii) a light exit unit (200) for escape of at least part of said lighting unit light (1001) from the lighting unit (1000), wherein the light exit unit (200) comprises a louvre unit (1200) comprising a plurality of louvre cells (210) for beam shaping the lighting unit light (1001), wherein the plurality of louvre cells (210) comprises a plurality of n subsets each comprising a respective plurality of m louvre cells (210), wherein the louvre cells (210) of each subset are configured as domain of adjoining louvre cells (210), wherein a respective plurality of k louvre cells (210) within each domain have mutually differing louvre cell cross-sections, wherein 3?n?100000, wherein 5?m?21, and wherein 5?k?m.

Abstract: The invention provides a lighting unit (1000) comprising a light mixing chamber (100) defined by faces (110) and an edge face (130), wherein a height (H) of the light mixing chamber (100) defined by a distance between the faces (110) is smaller than a first length (L1) of the light mixing chamber (100), wherein the lighting unit comprises a plurality of light sources (10) configured to provide light source light (11) in the light mixing chamber (100), wherein at least one of the faces (110) comprises a plurality of chamber openings (141) for escape of at least part of the light source light (11) from the light mixing chamber (100), wherein the lighting unit (1000) further comprises a plurality of beam shaping elements (150), with each beam shaping element (150) configured downstream from a corresponding chamber opening (141, and wherein the beam shaping elements (150) comprise reflectors (200).

Abstract: A lighting device comprises a carrier having a radially outwardly facing mounting surface and an inner cavity radially within the outer mounting surface. Solid state lighting devices are mounted on the outer mounting surface and a driver is housed in the inner cavity. A ring shaped optical unit defines a light output region of the lighting device and is mounted around the carrier. An outer housing reflects light from the arrangement of solid state lighting devices to the ring shaped optical unit. This provides a compact arrangement, in which the driver, the heat sink (implemented by the carrier), and the solid state lighting arrangement are essentially in a plane. This is possible by providing a ring of light sources facing radially outwardly, with the driver mounted radially inside the ring. The radial light output is converted to a light output with a desired direction and beam shape by the optical unit.

Abstract: A luminaire comprises a light guide having light outcoupling elements at one side and a flat light output surface at the other side, which is visible in use of the luminaire. An array of solid state lighting elements is arranged around the edge of the light guide facing the general light output direction. A respective reflector is associated with each solid state lighting element for reflecting light into the light guide. By providing the lighting elements all facing the general light output direction, they can be formed as a single unit, or as a small number of sub-units, thereby simplifying the manufacture. The design of the reflectors, the positioning of the lighting elements, and the design of the light outcoupling elements together may be used to create an asymmetrical light output beam shape. Actuation of different lighting elements may be used to provide different asymmetric light outputs.