EP4328485A1 - Luminaire à sortie de lumière réglable - Google Patents

Luminaire à sortie de lumière réglable Download PDF

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Publication number
EP4328485A1
EP4328485A1 EP22192149.7A EP22192149A EP4328485A1 EP 4328485 A1 EP4328485 A1 EP 4328485A1 EP 22192149 A EP22192149 A EP 22192149A EP 4328485 A1 EP4328485 A1 EP 4328485A1
Authority
EP
European Patent Office
Prior art keywords
light source
luminaire
elongate
cavity
depth
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP22192149.7A
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German (de)
English (en)
Inventor
designation of the inventor has not yet been filed The
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Signify Holding BV
Original Assignee
Signify Holding BV
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 Signify Holding BV filed Critical Signify Holding BV
Priority to EP22192149.7A priority Critical patent/EP4328485A1/fr
Publication of EP4328485A1 publication Critical patent/EP4328485A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the invention relates to luminaires and in particular, the invention relates to the luminaires with light output characteristics that can be adjusted.
  • the luminaire can only meet a specific application choice of some users and does not give users more lighting design choices. This limits the design inspiration of many lighting designers and can limit an artistic space lighting design.
  • wide beam angle luminaires are typically used to illuminate a room or a large area (i.e., so-called ambient lighting).
  • spotlights i.e., narrow beam angle lights
  • task lighting is typically used to illuminate particular locations or objects (i.e., so-called task lighting).
  • a luminaire comprising:
  • luminaires are limited to a particular lighting configuration. In some cases, it may be possible to change the general direction of the light output from a typical luminaire, but the lighting configuration (e.g., beam width) itself does not change.
  • the invention provides a luminaire which can be easily changed between task lighting (i.e., higher light density, lower illuminated area) and ambient lighting (i.e. lower light density, higher illuminated area).
  • the light shielding cover is opaque.
  • the cavity is a volume formed within the light shielding cover and the cavity ends at the opening.
  • the cavity defines an open channel and the elongate light source can be slid in and out of the channel through the opening.
  • the position within the cavity influences the light output characteristics, in particular a beam width.
  • the elongate light source may comprise a main light output face which is parallel with the opening of the cavity, wherein the main light output face protrudes out of the cavity through the opening when the elongate light source is mounted at the minimum depth.
  • the sides of the light source are no longer covered by the shielding cover, so that a wider beam is able to leave the light luminaire.
  • the main light output face may protrude out of the opening of the cavity by a lesser amount than when mounted at the minimum depth.
  • the adjustment provides different amounts by which the light source protrudes out of the cavity.
  • the main light output face may be flush with the opening of the cavity.
  • the main light output face may be recessed behind the opening of the cavity.
  • the main light emitting face of the light source may still protrude a small amount, or it may be flush or recessed within the cavity. In all cases, the directionality of the light is more limited when the light source is mounted at a greater depth.
  • a dimension of the elongate light source, in the mounting direction, is for example smaller than a corresponding dimension of the cavity of the light shielding cover so that the elongate light source can be received fully in the cavity.
  • the elongate light source may comprise further lateral light emitting faces perpendicular to the light emitting face.
  • the elongate light source may comprise a tube with omnidirectional light output in a plane perpendicular to a length direction of the elongate light source.
  • the elongate light source may be a linear light source.
  • the elongate light source and the light shielding cover are, for example, cuboidal.
  • the adjustable mounting system may comprise one or more screws or bolts configured to pass through one or more channels in the light shielding cover and adjustably attach to the elongate light source.
  • screws or bolts enables the user to change the configuration of the luminaire with ease and with the continuous adjustment. Users are likely to be used to using screws and bolts and thus there is a minimal learning curve. In this case, the amount by which the screws or bolts are screwed into the luminaire results in a different configuration for the luminaire.
  • the elongate light source may comprise one or more threaded bores for receiving the one or more screws or bolts of the adjustable mounting system.
  • An inner surface of the light shielding cover, defining the cavity may be reflective.
  • the reflectivity e.g. using reflective paint
  • the luminaire When the elongate light source is mounted at the maximum depth, the luminaire may be configured to provide an illumination field of view in a plane perpendicular to a length axis of the elongate light source less than or equal to 120 degrees.
  • the luminaire When the elongate light source is mounted at the minimum depth, the luminaire may be configured to provide an illumination field of view in a plane perpendicular to a length axis of the elongate light source of more than 120 degrees.
  • the beam angle of the light output may be adjusted between a relatively narrow beam and a relatively wide beam.
  • Changing the illumination field of view of the luminaire changes the amount of light at any point illuminated by the luminaire. This is change is enabled because the light from the light source is constrained to travel in a limited range of directions by the cover. This increases the light density and reduces the area which is illuminated by the luminaire.
  • the illumination field of view may be considered to be the illumination beam width.
  • the invention provides a luminaire comprising an elongate light source, a light shielding cover and an adjustable mounting system.
  • the light shielding cover comprises an elongate cavity for receiving the elongate light source which terminates at an opening through which the elongate light source is received.
  • the adjustable mounting system is used to mount the light source in the cavity in a depth direction.
  • the adjustable mounting system is capable of adjusting a depth of the elongate light source within the cavity in a continuous range between a minimum depth and a maximum depth.
  • Figure 1 shows a first view of a luminaire comprising an elongate light source 1, a light-shielding cover 2 and an adjustable mounting system.
  • the adjustable mounting system comprises a set of adjustable screws 3.
  • the light shielding cover comprises an elongate cavity with an opening (the bottom face in the orientation shown).
  • Figure 2 shows a second view of the luminaire.
  • the light source 1 is omnidirectional and can emit light in all directions within a plane perpendicular to the length direction of the light source.
  • the light source 1 can be recessed in the light shielding cover 2.
  • the adjustable screws 3 each connect to a threaded bore 4 on the back of the light source 1 through a channel 5 in the light shielding cover 2.
  • This depth is in a direction perpendicular to the elongate direction of the luminaire. It corresponds to a direction of insertion of the light source 1 into the opening into the cavity.
  • An inner surface of the light shielding cover 2, facing the light source 1, is reflective, for example sprayed with high-reflection paint.
  • the light shielding cover 2 can adjust the width of the output illumination beam by blocking the light escaping but the inner surface reflects the blocked so that it can exit the luminaire after one or more reflections.
  • the adjusting screws 3 pass through the channels 5 of the shielding cover 2 and connect with the threaded bores 4 on the back of the light source 1.
  • the light source 1 can move up and down in the shielding cover 2, thereby adjusting the amount of the light source 1 which protrudes from the shielding cover 2 through the cavity opening. Changing the amount of the light source 1 which protrudes from the shielding cover can achieve a change in lighting configuration between ambient lighting and task lighting so as to meet different lighting design requirements.
  • a minimum depth results in a relatively wide beam for ambient lighting
  • a maximum depth results in a relatively narrow beam for task lighting.
  • the light source protrudes so that a larger part of the body of the light source is exposed and is used to provide a wide beam of illumination.
  • the wide beam for example has a beam spread of more than 120 degrees (in a plane perpendicular to the elongate direction).
  • the outermost surface of the light source is used to provide a narrow beam of illumination.
  • the narrow beam for example has a corresponding beam spread of less than 120 degrees.
  • Figure 3 shows the luminaire in a task lighting configuration.
  • the light source is fully within the cavity formed by the shielding cover 2.
  • a main light output face 10 is the only surface of the light source which faces an opening in the shielding cover 2. In other words, the light source does not protrude from the shielding cover 2.
  • Figure 4 shows the luminaire in an ambient lighting configuration.
  • the light source 1 is only partially within the cavity formed within the shielding cover 2.
  • the main light output face 10 is not the only surface of the light source 1 which is not blocked by the shielding cover 2. In other words, the light source protrudes from the shielding cover 2.
  • the luminaire provides an adjustable lighting configuration which is suitable for the design of various lighting spaces.
  • the user can conveniently and freely adjust the lighting area and space lighting according to their own design by adjusting the screws 3 without the need for special customization of luminaire.
  • the luminaire provides convenience, ease of customization and a wide range of customization for the luminaire.
  • a linear luminaire is provided with an omnidirectional light engine (i.e. light source 1) that can be mounted in a housing (i.e. the light shielding cover 2) at different depths, allowing part of the light source 1 to protrude from the shielding cover 2 at least when the light source is mounted at a minimum depth.
  • omnidirectional light engine i.e. light source 1
  • a housing i.e. the light shielding cover 2
  • This provides the user with multiple uses for the same luminaire as it can be adjusted based on the application.
  • Figure 5 shows a cross section of the luminaire in a task lighting configuration.
  • continuously adjustable systems could be used to mount the light source 1 to the light shielding cover 2.
  • vertical rails, linear motors, gears or any system which can achieve continuous and linear movement of the light source within the light shielding cover 2 could be used.
  • the light source 1 is mounted in a depth direction 11 which is perpendicular to the elongate direction of the luminaire and the light source.
  • the depth may be defined as the amount of the light source 1 which is within the cavity formed by the light shielding cover 2.
  • the depth could also be defined as the distance of the screws 3 within the threaded bores 4.
  • the main light output face 10 does not protrude from the light shielding cover 2. This results in a relatively narrow beam of light 6 generated by the luminaire. In other words, the "illumination field of view" of the luminaire is relatively small, thereby providing a task lighting configuration.
  • Task lighting provides a narrow beam of light 6 with a typically brighter light.
  • the narrow beam 6 can typically illuminate objects further away but illuminates a generally small area.
  • the main light output face 10 could be flush with the opening of the light shielding cover or even slightly protrude from the cavity. These luminaire configurations could still provide task lighting depending on the design of the light source and light shielding cover.
  • the narrow beam of light 6 for task lighting could have an angle of less than or equal to 120 degrees, 110 degrees, 100 degrees, 90 degrees or 80 degrees.
  • the task lighting configurations of the luminaire could provide a narrow beam of light 6 having angle ranges of between 15 degrees to 120 degrees, 25 degrees to 110 degrees, 35 degrees to 100 degrees etc.
  • the exact angle ranges may depend on the envisioned usages of the luminaire (e.g. long distance spot light with a small angle vs ceiling mounted spot light with a wider angle).
  • the minimum angle in the range of angles could be defined by the maximum depth.
  • the light source 1 could also have further lateral light emitting faces perpendicular to the light emitting face.
  • the light from these lateral faces, in the task lighting configuration, could reflect from inner surfaces of the shielding cover 2 and add to the brightness of the narrow beam of light 6.
  • a back light emitting surface, perpendicular to the main light emitting surface 10 and facing in the opposite direction, could also be provided such that the light it emits is reflected by the top of the shielding cover 2.
  • the cuboidal light source could have a tube with omnidirectional light output, in a plane perpendicular to a length direction of the elongate light source, positioned in the center of the light source.
  • the light from the tube can be diffused through diffusion panels within the light source, thereby providing the four light emitting faces.
  • the light source may use any type of lighting technology such as solid state lighting (e.g. a tubular LED) or body-emitting lighting such as a fluorescent tube.
  • solid state lighting e.g. a tubular LED
  • body-emitting lighting such as a fluorescent tube.
  • the light source may be cylindrical or any other appropriate shape.
  • the shape of the light shielding cover 2 will be matched to the shape of the light source. However, the shape of the light shielding cover 2 should always allow the light source 1 to be adjusted in a continuous manner, in the depth direction, within an allowed range of depths (i.e. from maximum depth to minimum depth). Similarly, multiple light emitting diodes (LEDs) could be used for omnidirectional lighting.
  • LEDs light emitting diodes
  • Figure 6 shows a cross section of the luminaire in an ambient lighting configuration.
  • the screws 3 are only partially screwed into the threaded bores 4 of the light source 1. If the luminaire is ceiling mounted, gravity could be used to ensure the head of the screw/bolt 3 is pushed against the shielding cover 2. Alternatively, clips, or otherwise, could be used to hold the head of the screw against the shielding cover 2.
  • the main light output face 10 protrudes out of the light shielding cover 2.
  • the light source is mounted at, or near, a minimum depth.
  • the minimum depth may be defined by the adjustable mounting system.
  • the screw 3 must be screwed in by at least the minimum depth in order to hold the light source 1.
  • the beam of light 6 is typically much broader than in the task lighting configuration. This is because the light from the main light emitting face 10 is not limited by the sides of the shielding cover and, additionally, the lateral sides of the light source can also directly illuminate the area. As such, the light source will not be as bright in the ambient lighting configuration but it will cover a larger area than in the task lighting configuration.
  • the ambient lighting configuration could be defined by the angle of the light beam 6.
  • the ambient lighting could be defined as having a beam of light larger than 120 degrees.
  • the exact angle will depend in the particular needs (e.g. depending on the height of a ceiling onto which it is mounted).
  • the luminaire enables the user to easily change the lighting configuration by providing an adjustable mounting system which can continuously adjust the depth of the light source within the shielding cover. At a minimum depth, the user is able to choose to have an ambient lighting configuration. At a maximum depth, the user is able to choose to have a task lighting configuration.
  • the continuously adjustable depth also enables the user to configure the lighting configuration to any desired configuration between the task lighting configuration and the ambient lighting configuration without being limited to pre-defined lighting configurations.
  • Figure 7 shows a cross section of the light shielding cover 2.
  • the light shielding cover is provided with one or more channels 5 for the screws/bolts.
  • a cavity 7 is defined by the inner surfaces 9 of the light shielding cover 2.
  • the inner surfaces may be reflective, for example, by being coated with a reflective paint/material.
  • an opening 8 is defined at the bottom of the light shielding cover 2 which allows light through. The opening 8 is designed to enable the light source to protrude from the light shielding cover 2 through the opening.
  • the adjustable mounting system may comprise a gear-driven mechanism.
  • Figure 8 shows a cross section of a luminaire using a gear-driven mechanism.
  • the gear driven mechanism uses a rack 13 and pinion 12 to move the light source 1 linearly in the depth direction.
  • the rack 13 and pinion 12 convert rotational motion (e.g. manual or motor driven) into linear motion of the light source 1. This is achieved by attaching the rack 13 to the light source 1.
  • Figure 9 shows a luminaire using a gear-driven mechanism in the ambient lighting configuration.
  • the rack 13 and pinion 12 shown in Figure 8 can be driven manually using the knob 14.
  • a user could rotate the knob 14, which is mechanically connected to the pinion 12 of Figure 8 , and thereby cause light source 1 to move in the depth direction into, or away from, the housing 2.
  • the pinion could be driven by a motor (or similar).
  • the gear driven mechanism could also use one or more gears mechanically connected to the pinion 12.
  • the use of the gears could provide a more precise control of the motion of the light source 1 relative to the housing 2.
  • Figure 10 shows an exploded view of a luminaire with a gear-driven mechanism.
  • the gear-driven mechanism is in this example positioned on both sides of the luminaire in order to provide further stability to the motion of the light source 1 relative to the housing 2.
  • two knobs 14 are attached to respective pinions 12 and the respective racks 13 are attached to the light source 12.
  • a hole 15 is provided in the housing 2 which allows the pinion to pass through the housing 2 without allowing the knob 14 through the housing 2.
  • the pinion 12 can thus mechanically connect to the rack 13 within the housing 2 whilst the motion can be controlled from outside the housing 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP22192149.7A 2022-08-25 2022-08-25 Luminaire à sortie de lumière réglable Pending EP4328485A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22192149.7A EP4328485A1 (fr) 2022-08-25 2022-08-25 Luminaire à sortie de lumière réglable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22192149.7A EP4328485A1 (fr) 2022-08-25 2022-08-25 Luminaire à sortie de lumière réglable

Publications (1)

Publication Number Publication Date
EP4328485A1 true EP4328485A1 (fr) 2024-02-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22192149.7A Pending EP4328485A1 (fr) 2022-08-25 2022-08-25 Luminaire à sortie de lumière réglable

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EP (1) EP4328485A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE848933C (de) * 1949-09-16 1952-09-08 Alfred Dipl-Ing Rumler Verstellbarer Reflektorhalter fuer Leuchtroehren
DE8802509U1 (de) * 1988-02-26 1988-04-07 Zumtobel Ag, Dornbirn Leuchtstofflampenleuchte mit einem Leuchtengehäuse
WO2001020223A2 (fr) * 1999-09-17 2001-03-22 Brightline, L.P. Accessoires reglables pour eclairage fluorescent
US20050254241A1 (en) * 2004-05-11 2005-11-17 Harwood Ronald P Color changing light fixture
US20200191358A1 (en) * 2018-12-12 2020-06-18 Aleddra Inc. Elongated Lighting Apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE848933C (de) * 1949-09-16 1952-09-08 Alfred Dipl-Ing Rumler Verstellbarer Reflektorhalter fuer Leuchtroehren
DE8802509U1 (de) * 1988-02-26 1988-04-07 Zumtobel Ag, Dornbirn Leuchtstofflampenleuchte mit einem Leuchtengehäuse
WO2001020223A2 (fr) * 1999-09-17 2001-03-22 Brightline, L.P. Accessoires reglables pour eclairage fluorescent
US20050254241A1 (en) * 2004-05-11 2005-11-17 Harwood Ronald P Color changing light fixture
US20200191358A1 (en) * 2018-12-12 2020-06-18 Aleddra Inc. Elongated Lighting Apparatus

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