WO2018007291A1 - Réflecteur encastré pour applications d'éclairage lèche-mur - Google Patents

Réflecteur encastré pour applications d'éclairage lèche-mur Download PDF

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Publication number
WO2018007291A1
WO2018007291A1 PCT/EP2017/066451 EP2017066451W WO2018007291A1 WO 2018007291 A1 WO2018007291 A1 WO 2018007291A1 EP 2017066451 W EP2017066451 W EP 2017066451W WO 2018007291 A1 WO2018007291 A1 WO 2018007291A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
luminaire
frontal layer
light
clear material
Prior art date
Application number
PCT/EP2017/066451
Other languages
English (en)
Inventor
Peter John FRANCK
Mark Owen JONES
Graham Michael RIPPEL
Original Assignee
Philips Lighting Holding B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Lighting Holding B.V. filed Critical Philips Lighting Holding B.V.
Priority to US16/315,185 priority Critical patent/US10711974B2/en
Priority to EP17733865.4A priority patent/EP3482120B1/fr
Priority to CN201780042063.5A priority patent/CN109477619B/zh
Publication of WO2018007291A1 publication Critical patent/WO2018007291A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following

Definitions

  • the present invention is directed to Inventive methods and apparatus for providing an open wall wash luminaire designed to allow a small amount of light to interact with the luminaire 's kick reflector, resulting in the kick reflector being less noticeable in the ceiling opening.
  • a typical recessed lighting fixture includes a frame, a reflector, a junction box and structure for attaching the frame to the ceiling.
  • the frame includes an opening through which the reflector is employed to direct light to an area below the lighting fixture.
  • a wall-wash reflector is employed to direct the light down at an angle away from the lighting fixture to illuminate a section of a wall. If a conventional downlight is placed near a wall, an arch results having light below and darkness above (as illustrated in Fig. 1).
  • the first is typically referred to as a lensed wall washer.
  • This uses an angled lens 220 to diffuse the light as depicted in Fig. 2a.
  • the advantage of this approach is that it provides good light coverage of the wall.
  • it has several disadvantages:
  • the lens 220 is very bright, producing an amount of glare within the room that some people find objectionable.
  • the lighting fixture 210 has a different appearance than other recessed lights in the room.
  • Designers prefer the wall washer fixtures near the walls to look similar to other downlights in the room.
  • the thickness of the cone cut on one end typically results in a dark area at the top of the wall (approximately 2 inches below the plane 240 of the ceiling).
  • the second approach to wall washing is typically referred to as an "open wall washer.” That is, it is open in the sense that there is no lens close to the ceiling aperture 310.
  • an open wall washer usually consists of two parts: (1) a downlight cone 320 that gives the same appearance when viewed from the room side, as a simple downlight not having a wall washing function; and (2) a "kick reflector” 330 that bulges out the side and "kicks" the light higher up the wall so that the wall illuminance is more uniform than a simple downlight.
  • a possible solution to the problem of the bulge causing difficulty in fitting the light into a frame is to shrink the size of the downlight portion so that it is smaller than a standard downlight.
  • the flange width is different between the standard downlight cone and the wall wash cone. This result is objectionable to both designers and occupants of the room observing the light fixture from below.
  • FIG. 4a Another solution, employed by various manufacturers, is to maintain the size and shape of the downlight cone, but attach the kick reflector to the inside rather than letting it bulge to the outside.
  • Fig. 4a This eliminates the problem of the bulge not fitting through the frame or housing.
  • the kick reflector blocks light of the opening, thus modifying the light coming out of the opening to something less than a clean circle as illustrated in Fig. 4b. (i.e., light is blocked by the kick reflector).
  • Attempts to mitigate the visual appearance of the blocked area include painting of the bottom 410 of the kick white or vacuum-metalizing it as the same finish as the kick reflector surface. Such attempts do not truly overcome the problem of the light fixture being significantly different in appearance from simple recessed lights when viewed from below (as depicted in Fig. 4b).
  • US 9052081 (2015-06-09) relates to a magnetic kicker reflector that is installed within a refiector of a downlight fixture to create a "wall-wash" effect on one or more adjacent walls.
  • the magnetic kicker reflector includes a proximal end, a distal end, a side surface extending from the proximal end to the distal end, and one or more magnets.
  • the side surface includes an internal surface and an external surface.
  • the magnets are coupled to or adjacent the external surface and faces substantially the same direction as the external surface.
  • the proximal end, the distal end, and the side surface are formed having an arcuate length.
  • the wall-wash assembly includes the kicker reflector, a reflector, and one or more bands coupled around and in contact with the outer surface of the reflector.
  • the bands are in alignment with the magnets so that the kicker reflector is rotatable within the reflector and maintains attraction to the bands.
  • US 4475147 (1984-10-02) relates to a "wall wash" assembly for use with a ceiling mounted, recessed lighting fixture comprising a reflector housing having an open end, includes a ring member dimensioned for receipt in the open end of the reflector housing.
  • a concentric ring segment is mounted on the ring member for movement 360° thereabout.
  • An auxiliary reflector is mounted on the ring segment for movement therewith. Positioning of the auxiliary reflector by movement of the ring segment with respect to the ring member provides a desired "wall wash” illumination pattern.
  • An optional baffle member is receivable on the ring member opposite the auxiliary reflector for blocking light emanating from the reflector housing to be excluded in the "wall wash” illumination pattern.
  • US 2007/047235 (2007-03-01) relates to an apparatus that has a downlight cone defining a longitudinal axis and reflecting a portion of light from a light source to produce a scallop beam pattern on a surface.
  • a window is defined by the downlight cone and has a zone that defines an angle that ranges from between specific degrees.
  • the window includes another zone that defines another angle that is about 180 degrees.
  • the window has a pair of symmetric contours that extends between the zones.
  • the present disclosure is directed to inventive methods and apparatus that provides a reflector that is completely inside the downlight cone, eliminating the problem of fitting into a frame or housing that the bulge reflector has. Further, the new approach allows some light to fall behind the reflector, either through a clear medium such as acrylic or with a floating reflector held off from the downlight reflector cone. This allows light both in front of the kick reflector and behind the kick reflector - resulting in the light from the fixture appearing similar to that of a conventional downlight when viewed from below. BRIEF DESCRIPTION OF THE DRAWINGS
  • Fig. 1 illustrates a wall surface illuminated with a conventional ceiling light fixture
  • Fig. 2a is a perspective view of an exemplary prior art recessed luminaire which utilizes an angled lens to diffuse light onto a wall;
  • Fig. 2b illustrates the light fixture of Fig. 2a when viewed by an occupant in the room
  • Fig. 3a is a perspective view of an exemplary prior art recessed luminaire which utilizes a kick reflector to diffuse light onto a wall;
  • Fig. 3b illustrates the external appearance of the light fixture of Fig. 3a
  • Fig. 4a is a perspective view of an exemplary prior art recessed luminaire which provides a kick reflector within the downlight cone;
  • Fig. 4b illustrates the light fixture of Fig. 4a when viewed from below;
  • Fig. 5 illustrates an exemplary of the present invention wherein the kick reflector comprises a solid clear material
  • Figs. 6a and 6b illustrate light being emitted from the light fixture of Fig. 5;
  • Fig. 7 illustrates and additional embodiment of the invention in which the kick reflector is positioned away from the downlight cone of the luminaire
  • Figs. 8a-8d illustrate alternative embodiments of the shape of the bottom edge of the kick reflector.
  • Figs. 9a and 9b illustrate alternative embodiments of the invention in which a portion of the kick plate is hollow.
  • Fig. 5 illustrates an exemplary light fixture of the present invention.
  • the invention includes a kick reflector 500 which consists of a clear material 510 (such as Polymethyl Methacrylate (PMMA)).
  • the kick reflector further comprises a front layer 520 that is anodized or otherwise made reflective on both sides - that is, on the front and back surfaces of layer 520.
  • the kick reflector 500 dips below the ceiling plane 240.
  • the kick reflector is set flush with the ceiling.
  • the body 510 of the kick reflector i.e., the material behind the front layer 520
  • a solid clear material e.g., an acrylic
  • the bottom surface 530 of the kick reflector 500 could be smooth or have some surface texture to increase the brightness. .Further, color could be added to body 510 or just to bottom surface 530 to create a decorative effect should such an effect be desired by the customer.
  • the front surface 520 of the kick reflector i.e., the surface facing the interior of the light fixture 210
  • consisting of a reflective material would direct light toward the wall in a manner similar to that of the prior art (and as illustrated above in Fig. 4a).
  • some light emitted by the light source passes through the top surface 610 of the clear kick reflector material.
  • the clear material then acts as a light guide to allow some light to spill out the bottom surface 530 of the clear material as illustrated in Fig. 6b.
  • the downlight cone 320 has some brightness
  • the clear material has some brightness. Consequently, the two surfaces visually blend together.
  • the kick reflector viewable edge 530 is not as noticeable as it would be if it were constructed in the manner taught by the prior art (e.g., as depicted as item 410 of Figs. 4a and 4b).
  • the kick reflector 700 is more conventional in appearance, not comprising any clear material. Rather, an open air gap 710 is provided behind the kick reflector and the downlight cone 320. The gap at the top 720 is of sufficient size to allow some light behind the kick reflector 700. As illustrated in Fig. 7, this light is then reflected against both the back edge of the reflective front layer 520 of the kick plate and the downlight reflector cone. This results in light being emitted from the gap 730 at the bottom of the kick plate and thus from the luminaire in a manner similar to the emitted light of Fig. 6b. The result is also the same - the kick reflector is not as noticeable as in the prior art.
  • Figs. 8a and 8b depict various alternative embodiments of the bottom surface 530 of the solid kick reflector as viewed from below. As depicted, the side edges of this bottom surface 530 can be essentially squared-off (Fig. 8a) or somewhat rounded (Fig. 8b). Figs. 8c and 8d illustrate similar shapes that are formed by the reflective front layer 520 of the kick plate when viewed from below. The invention is not so limited, as other alternative shapes are contemplated by the invention. It should be noted that in use, the bottom of the kick reflector would not appear as pronounced as in Figs. 8a - 8d.
  • the kick plate comprises a solid clear part 910 (e.g. consisting of a clear acrylic), a refiective front layer 920 that is reflective on both sides, and a hollow portion 930 positioned between the solid clear part and the reflector cone 320 of the light fixture.
  • the reflective front layer is positioned between the solid clear part 910 and the interior of the lighting fixture such that it does not cover the top portion 940 of the solid clear part, thereby allowing light to pass into the hollow section 930.
  • the reflective front layer 920 does not extend across the bottom 950 section of the kick plate, permitting light to readily exit the hollow portion 930.
  • inventive embodiments are presented by way of example only and that, within the scope of the appended claims and equivalents thereto, inventive embodiments may be practiced otherwise than as specifically described and claimed.
  • inventive embodiments of the present disclosure are directed to each individual feature, system, article, material, kit, and/or method described herein.
  • a reference to "A and/or B", when used in conjunction with open-ended language such as “comprising” can refer, in one embodiment, to A only (optionally including elements other than B); in another embodiment, to B only (optionally including elements other than A); in yet another embodiment, to both A and B (optionally including other elements); etc.
  • the phrase "at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements.
  • This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase "at least one" refers, whether related or unrelated to those elements specifically identified.
  • At least one of A and B can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne des procédés et un appareil pour fournir un luminaire ouvert d'éclairage lèche-mur conçu pour permettre le passage d'une petite quantité de lumière derrière le réflecteur encastré du luminaire, permettant de rendre moins visible le réflecteur encastré par un occupant de la chambre lors de la fourniture d'éclairage par le luminaire.
PCT/EP2017/066451 2016-07-06 2017-07-03 Réflecteur encastré pour applications d'éclairage lèche-mur WO2018007291A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US16/315,185 US10711974B2 (en) 2016-07-06 2017-07-03 Kick reflector for wall wash applications
EP17733865.4A EP3482120B1 (fr) 2016-07-06 2017-07-03 Réflecteur de kick mural pour des applications de lavage
CN201780042063.5A CN109477619B (zh) 2016-07-06 2017-07-03 用于洗墙应用的踢反射器

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201662358744P 2016-07-06 2016-07-06
US62/358,744 2016-07-06
EP16186430 2016-08-30
EP16186430.1 2016-08-30

Publications (1)

Publication Number Publication Date
WO2018007291A1 true WO2018007291A1 (fr) 2018-01-11

Family

ID=56852126

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/066451 WO2018007291A1 (fr) 2016-07-06 2017-07-03 Réflecteur encastré pour applications d'éclairage lèche-mur

Country Status (1)

Country Link
WO (1) WO2018007291A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108534018A (zh) * 2018-04-19 2018-09-14 张�浩 一种灯具
CN108730920A (zh) * 2018-04-19 2018-11-02 张�浩 一种不对称配光的照明用光学系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475147A (en) 1982-08-19 1984-10-02 Mcgraw-Edison Company Adjustable wall wash reflector assembly for a recess mounted lighting fixture
US20070047235A1 (en) 2005-08-24 2007-03-01 Cooper Technologies Company Method and apparatus for providing light
US9052081B1 (en) 2012-05-04 2015-06-09 Cooper Technologies Company Magnetic downlight wall-wash kicker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475147A (en) 1982-08-19 1984-10-02 Mcgraw-Edison Company Adjustable wall wash reflector assembly for a recess mounted lighting fixture
US20070047235A1 (en) 2005-08-24 2007-03-01 Cooper Technologies Company Method and apparatus for providing light
US9052081B1 (en) 2012-05-04 2015-06-09 Cooper Technologies Company Magnetic downlight wall-wash kicker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108534018A (zh) * 2018-04-19 2018-09-14 张�浩 一种灯具
CN108730920A (zh) * 2018-04-19 2018-11-02 张�浩 一种不对称配光的照明用光学系统

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