US-20260126164-A1 - LIGHT FIXTURE

US20260126164A1US 20260126164 A1US20260126164 A1US 20260126164A1US-20260126164-A1

Abstract

A luminaire to be mounted into a first building wall and for illuminating a second building wall arranged adjacently to the first building wall, including a housing, a printed circuit board on which a plurality of LED clusters are arranged, and a reflector arrangement having a number of reflector bowls that corresponds to the number of the LED clusters. The housing is recessed, with the reflector arrangement, into the first building wall. The reflector arrangement protrudes outwards from the first building wall with a protruding portion. The luminaire is covered by a dome-shaped cover that has a transparent cutout that faces the second building wall in the assembly state of the luminaire and which allows the light components, emitted from the LED clusters and reflected at the reflector bowls, including light components reflected at the protruding portion, to pass through to the second building wall.

Inventors

Matthias Bremerich

Assignees

ERCO GMBH

Dates

Publication Date: 20260507
Application Date: 20250905
Priority Date: 20240912

Claims (20)

1 - 40 . (canceled)
41 . A luminaire to be mounted into a first building wall and for illuminating a second building wall arranged adjacently to the first building wall, comprising: a housing; a printed circuit board on which a plurality of LED clusters are arranged; and a reflector arrangement comprising a number of reflector bowls that corresponds to a number of the LED clusters, wherein the housing and the reflector arrangement are recessed into the first building wall, and wherein the reflector arrangement protrudes outwards from the first building wall with a protruding portion, wherein the luminaire is covered by a dome-shaped cover that has a cutout which can be passed through by light and which faces the second building wall in an assembly state of the luminaire and which allows passing of parts of the light, emitted from the LED clusters and reflected at the reflector bowls, including parts of the light reflected at the protruding portion to the second building wall.
42 . The luminaire according to claim 41 , wherein the reflector bowls each comprise an outer bowl edge which protrudes from the first building wall, and an inner bowl edge which protrudes into the first building wall.
43 . The luminaire according to claim 42 , wherein a connection line between an outer bowl edge and an inner bowl edge forms a straight line which is arranged inclined relative to the second building wall.
44 . The luminaire according to claim 42 , wherein the LED clusters are arranged closer to the inner bowl edge than to the outer bowl edge.
45 . The luminaire according to claim 42 , wherein the outer bowl edge of a reflector bowl is spaced approximately 1.5 times to 10 times as far from the associated LED cluster compared with the inner bowl edge.
46 . The luminaire according to claim 41 , wherein the plurality of LED clusters are arranged along a straight line that extends in parallel with the second building wall.
47 . The luminaire according to claim 46 , wherein each reflector bowl, based on the direction of the straight line, has a front bowl edge and a rear bowl edge, and the second building wall, based on the direction of the straight line, has a front wall region and a rear wall region, wherein the light components that are cast from an LED cluster onto portions of the associated reflector bowl which are arranged close to the front bowl edge are deflected towards regions of the second building wall that are adjacent to the rear wall region, and wherein the light components that are cast from an LED cluster onto portions of the associated reflector bowl that are arranged close to the rear bowl edge are deflected towards regions of the second building wall that are adjacent to the front wall region.
48 . The luminaire according to claim 41 , wherein only those light components, emitted by the LED clusters, that have undergone a reflection at a reflector bowl of the reflector arrangement strike the second building surface.
49 . The luminaire according to claim 41 , wherein the luminaire comprises shielding elements which prevent an emission of unreflected light components.
50 . The luminaire according to claim 41 , wherein each LED cluster, is associated with a reflector bowl.
51 . The luminaire according to claim 41 , wherein each reflector bowl receives light from just one LED cluster.
52 . The luminaire according to claim 42 , wherein the light components that are cast from an LED cluster onto portions of the associated reflector bowl that are arranged close to the outer bowl edge are deflected towards regions of the second building wall that are adjacent to the first building wall, and the light components that are cast from an LED cluster onto portions of the associated reflector bowl that are arranged close to the inner bowl edge are deflected towards regions of the second building wall that are arranged remotely from the first building wall.
53 . The luminaire according to claim 41 , wherein each LED cluster comprises one LED or a plurality of LEDs that are arranged adjacently to one another or directly adjacently.
54 . The luminaire according to claim 41 , wherein the luminaire comprises three LED clusters and three reflector bowls.
55 . The luminaire according to claim 41 , wherein the luminaire is configured as a ground recessed luminaire and for illuminating a vertical or substantially vertical building wall.
56 . The luminaire according to claim 41 , wherein the reflector bowls of the reflector arrangement are configured symmetrically with respect to a central longitudinal plane of the reflector arrangement.
57 . The luminaire according to claim 41 , wherein at least one LED cluster is composed of at least two different LEDs which emit light of different spectra.
58 . The luminaire according to claim 57 , wherein the two LEDs radiate light into a light guide which is fixed relative to the printed circuit board and which guides the light, while allowing for light mixing, to a light emission surface, from which the mixed light is cast onto the associated reflector bowl.
59 . A system for homogeneous wall flooding, comprising a plurality of luminaires according to claim 41 , wherein the plurality of luminaires are arranged along a straight line, and wherein the plurality of luminaires are configured for joint illumination of the second building wall.

Description

The invention relates to a luminaire according to claim 1. The applicant has been developing and manufacturing luminaires for illuminating building surfaces for more than eight decades. The present patent application relates to a luminaire which is fitted into a first building wall and serves for illuminating a second building wall. For example, the luminaire can be configured as a ground recessed luminaire and serve for illuminating a vertical or substantially vertical second building wall that is adjacent to the base wall. The luminaire according to the invention is intended to illuminate the surface provided by the second building wall as homogeneously as possible. If the second building wall is a vertical wall, both deep regions of the second building wall and high regions are intended to be illuminated homogeneously. Furthermore, it is desirable for the luminaire to manage with only a very small wall clearance and to nonetheless homogeneously illuminate very wide regions of the second building wall. The object of the invention is that of developing a luminaire which, as a recessed luminaire, is suitable for homogeneously illuminating high and wide building surfaces and which allows an only small wall clearance. The invention achieves this object with the features of claim 1. The luminaire according to the invention serves to be fitted into a first building wall and to illuminate a second building wall. The second building wall in particular adjoins the first building wall. For example, the first building wall may be a base wall, and the second building wall a vertical or substantially vertical building wall. The luminaire can be arranged at an only small wall clearance from the second building wall, for example at a clearance of 50 cm or 80 cm from the second building wall. When such small wall clearances are used, e.g. wall heights of up to approximately 5 m in height can be illuminated homogeneously. For the event that even higher walls, of e.g. 8 m to 10 m in height, are to be flooded homogeneously, the luminaires according to the invention can have wall clearances of e.g. 100 cm to 150 cm. These small wall clearances cannot be achieved with luminaires of the prior art. The luminaire according to the invention comprises a housing which is configured e.g. as an installation housing and is for example cast into a base wall or mounted in a cavity provided there. A printed circuit board is arranged within the housing, on which board a plurality of LED clusters are arranged. An LED cluster within the meaning of the invention is a compact arrangement of one or more LEDs which provide a light point or a type of light point. The LEDs are thus not arranged in large number on a printed circuit board and arranged widely distributed along the printed circuit board surface, but rather an LED cluster is a centered, light-emitting region in the manner of a light point. An LED cluster can comprise e.g. two high-power LEDs. An LED cluster within the meaning of the invention provides a virtually punctiform or approximately punctiform light source. Electronic or electrical components for power supply of the LED clusters can be provided within the housing of the luminaire, e.g. control elements, controllers, drivers, and all other typically components that are required or suitable for operating an LED luminaire. The luminaire according to the invention comprises a particular reflector arrangement: The reflector arrangement of the luminaire according to the invention comprises a plurality of reflector bowls, wherein the number of reflector bowls corresponds to the number of LED clusters. For example, the reflector arrangement according to the invention can comprise two or three reflector bowls and correspondingly two or three LED clusters. Each LED cluster is associated with its own reflector bowl. Each reflector bowl is associated with its own LED cluster. The reflector bowls each comprise a highly reflective freeform surface, which is designed and optimized using algorithms. The interior of each reflector bowl faces the respective LED cluster. The printed circuit board comprising the LED clusters is arranged between the second building wall and the reflector arrangement with the reflector bowls, in the mounted state of the luminaire. Each reflector bowl receives light only from one LED cluster, and each LED cluster radiates light only or largely only into one of the reflector bowls. One embodiment of the invention comprises three LED clusters and three reflector bowls. Each LED cluster comprises a plurality of LEDs, e.g. two high-power LEDs. The plurality of reflector bowls can be interconnected, in particular combined integrally to form a reflector arrangement. The inner surfaces of the reflector bowls are in particular highly mirrored. The reflector arrangement can e.g. be provided by a plastics injection-molded part, which is provided with a highly reflective coating in the region of the reflector bowls. The lumina