US-12624809-B2 - Luminaire for illuminating a surface

US12624809B2US 12624809 B2US12624809 B2US 12624809B2US-12624809-B2

Abstract

A luminaire that produces two beams of light. First of light is generated and output, as a first light beam, from a first chamber of the luminaire. Second light is generated and output from a second chamber into a third chamber via an elongate component that performs beamshaping on the second light. The beamshaped second light is output from the third chamber as a second beam of light. An elongate component holder holds or supports the elongate component and provides at least part of the bounds for the first and second chambers.

Inventors

Peter Johannes Martinus Bukkems
Erik Paul Boonekamp
Marcus Cornelis Van Meel

Assignees

SIGNIFY HOLDING B.V.

Dates

Publication Date: 20260512
Application Date: 20230822
Priority Date: 20220906

Claims (14)

1 . A luminaire for illuminating a surface with two beams of light, the luminaire comprising: a first chamber housing a first lighting arrangement for generating first light having first light characteristics, the first chamber comprising a first light output window for outputting the first light from the first chamber out of the luminaire in the form of a first light beam; a second chamber housing a second lighting arrangement for generating second light having second, different light characteristics; an elongate optical component configured to perform beamshaping on light provided to the elongate optical component; an elongate component holder configured to hold the elongate optical component and forming at least part of the bounds of the first chamber and at least part of the bounds of the second chamber, wherein the elongate component holder is configured to: prevent or restrict the passage of no less than 90% of the first light from the first chamber to the elongate optical component; and permit the passage of the second light from the second chamber to the elongate optical component; and a third chamber, at least partially bounded by the elongate optical component and configured to receive beamshaped second light from the elongate optical component, the third chamber comprising a second light output window for outputting the beamshaped second light from the third chamber out of the luminaire in the form of a second light beam, wherein the elongate component holder comprises a translucent or transparent portion that defines at least part of the bounds of the second chamber and is configured to permit the passage of light from the second chamber to the elongate optical component.
2 . The luminaire of claim 1 , wherein: a cross-sectional shape of the elongate optical component comprises an arc; and the elongate component holder comprises a holding portion, having an arc-shaped cross-sectional area, for holding the elongate optical component at the arc of the cross-sectional shape of the elongate component holder.
3 . The luminaire of claim 1 , wherein the translucent or transparent portion of the elongate component holder is configured to diffuse light passing from the second chamber to the elongate optical component.
4 . The luminaire of claim 1 , further comprising an optical foil, for performing linear diffusing of light, held between the elongate optical component and the elongate component holder.
5 . The luminaire of claim 1 , wherein the elongate component holder comprises a reflective portion that defines at least part of the bounds of the first chamber and is configured to reflect first light incident thereon.
6 . The luminaire of claim 1 , wherein the elongate component holder comprises a scattering portion that defines at least part of the bounds of the first chamber and is configured to scatter and/or diffuse first light in the first chamber.
7 . The luminaire of claim 1 , wherein the elongate component holder is configured to prevent the passage of light from the elongate optical component to the first chamber.
8 . The luminaire of claim 1 , wherein the first light output window and the second light output window are configured to define a distinguishable boundary between the first light beam and the second light beam.
9 . The luminaire of claim 1 , wherein the second light output window is configured to define a distinguishable bottom edge to the second light beam.
10 . The luminaire of claim 1 , further comprising a ceiling mount configured for mounting the luminaire to a ceiling.
11 . The luminaire of claim 10 , wherein, when the luminaire is mounted to the ceiling via the ceiling mount, the first light beam output by the luminaire is above the second light beam output by the luminaire.
12 . The luminaire of claim 1 , wherein: the first lighting arrangement comprises a first set of one or more LEDs; and the second lighting arrangement comprises a second set of one or more LEDs.
13 . The luminaire of claim 1 , wherein the first light has a different color and/or color temperature to the second light.
14 . The luminaire of claim 1 , wherein the elongate component holder is an extruded elongate component holder, being a component holder produced using an extrusion process.

Description

CROSS-REFERENCE TO PRIOR APPLICATIONS This application is the U.S. National Phase application under 35 U.S.C. § 371 of International Application No. PCT/EP2023/073036, filed on Aug. 22, 2023, which claims the benefit of European Patent Application No. 22194142.0, filed on Sep. 6, 2022. These applications are hereby incorporated by reference herein. FIELD OF THE INVENTION The present invention relates to the field of lighting, and in particular, to luminaires for illuminating a wall with two light beams. BACKGROUND OF THE INVENTION There is an increasing interest in accent lighting. One area of growing interest is the illumination of surfaces, which is commonly provided by luminaires that project light onto a surface to provide a wall wash effect. Wall-wash lighting has a perceived effect of improved sense of space, and provides texture and interest to an illuminated surface. Typically, luminaires capable of providing a pattern of light comprise a light source that emits or projects light in a direction of the surface. For instance, currently available luminaires include directional downlights or spotlights positioned to illuminate a wall or surface. One area of particular interest is to provide a two-tone effect on an illuminated surface. In this scenario, the surface or wall is illuminated with two light separate beams that appear to be stacked on top of one another, forming an upper illuminated area having first light characteristics and a lower illuminated area having second, different light characteristics. The upper and lower illuminated areas may differ in color, color temperature and/or intensity. SUMMARY OF THE INVENTION The invention is defined by the claims. According to examples in accordance with an aspect of the invention, there is provided a luminaire for illuminating a surface with two beams of light. The luminaire comprises: a first chamber housing a first lighting arrangement for generating first light having first light characteristics, the first chamber comprising a first light output window for outputting the first light from the first chamber out of the luminaire in the form of a first light beam; a second chamber housing a second lighting arrangement for generating second light having second, different light characteristics; an elongate optical component configured to perform beamshaping on light provided to the elongate optical component: an elongate component holder configured to hold the elongate optical component and forming at least part of the bounds of the first chamber and at least part of the bounds of the second chamber. The elongate component holder is configured to: prevent or restrict the passage of no less than 90% of the first light from the first chamber to the elongate optical component; and permit the passage of the second light from the second chamber to the elongate optical component; and a third chamber, at least partially bounded by the elongate optical component and configured to receive beamshaped second light from the elongate optical component, the third chamber comprising a second light output window for outputting the beamshaped second light from the third chamber out of the luminaire in the form of a second light beam. The present disclosure provides a luminaire for illuminating a surface or a wall with two beams of light. A first light beam is output from a first chamber. A second light beam is passed from a second chamber to an elongate optical component that performs one or more beam shaping processes on the received light. The beamshaped light is passed through to a third chamber, from which a second light beam is output. The present disclosure proposes to use an elongate component holder as part of the boundary between the first and second chambers, as well as to hold the elongate optical component. This provides an approach for reducing a size of the luminaire. This effect is achieved by providing an element that is able to perform more than one function at a same time. In some examples, a cross-sectional shape of the elongate optical component comprises an arc; and the elongate component holder comprises a holding portion, having an arc-shaped cross-sectional area, for holding the elongate optical component at the arc of the cross-sectional shape of the elongate component holder. This approach provides a compact structure for the elongate component and elongate component holder. The elongate component holder may comprise a translucent or transparent portion that defines at least part of the bounds of the second chamber and is configured to permit the passage of light from the second chamber to the elongate optical component. Preferably, the translucent or transparent portion of the elongate component holder is configured to diffuse light passing from the second chamber to the elongate optical component. This increases the uniformity of light passing to the elongate optical component. The luminaire may further comprise an optical foil, for performing