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
  • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
  • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
  • F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
  • F21V23/008—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being outside the housing of the lighting device
• • 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
  • F21V15/00—Protecting lighting devices from damage
  • F21V15/01—Housings, e.g. material or assembling of housing parts
• • 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
  • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
  • F21V29/10—Arrangement of heat-generating components to reduce thermal damage, e.g. by distancing heat-generating components from other components to be protected
• • 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
  • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
  • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
  • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
• • 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
  • F21V19/00—Fastening of light sources or lamp holders
  • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
  • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
  • F21V19/0035—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
• • 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
  • F21V19/00—Fastening of light sources or lamp holders
  • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
  • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
  • F21V19/004—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by deformation of parts or snap action mountings, e.g. using clips
• • 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
  • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
  • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
  • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
• • 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
  • F21V31/00—Gas-tight or water-tight arrangements
  • F21V31/005—Sealing arrangements therefor
• • 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
  • F21Y2105/00—Planar light sources
  • F21Y2105/10—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements
• • 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
  • F21Y2115/00—Light-generating elements of semiconductor light sources
  • F21Y2115/10—Light-emitting diodes [LED]

Definitions

• the invention is concerned with the task of providing an improved flat luminaire that has an improved heat distribution with regard to heat-sensitive components of the luminaire.
• This task is solved by the luminaire according to independent claim 1.
• the invention is defined in the respective independent claim. Additional features of the invention are provided in the respective dependent claims.
• a flat luminaire extending longitudinally along a longitudinal extension axis.
• the luminaire has a rear side and a front side respectively extending longitudinally along the longitudinal extension axis at opposite sides of the longitudinal extension axis, wherein the luminaire comprises: a light source; a driver for driving the light source; a flat housing; and a driver box.
• the flat housing defines a light source mounting space for housing the light source on an inside of the flat housing, wherein the flat housing extends longitudinally along the longitudinal extension axis, and wherein the flat housing has: a body, whereas the light source is mounted to the body inside the flat housing at a surface of the body facing the front side, and a light emission opening at the front side for light emission of light generated by the light source.
• the driver is mounted on an inside surface of the driver box, wherein the driver box is mounted on the rear side of the body.
• the components are utmost beneficially arranged, as heat dissipation of the light source is separated from the driver, such that these two heat generating components are locally separated.
• the separate driver box being positioned on the rear side of the luminaire, and the light source being housed in the housing of the luminaire, an effective heat separation is achieved.
• the heat-sensitive components of the luminaire are apart and thus do not negatively influence the respective other. Hence, heat removal and heat dissipation is improved.
• a luminary system comprising at least two flat luminaires, each according to any one of the herein described implementations, is additionally provided.
• each two of the at least two flat luminaires are coupled together via an accessory plate, forming one enlarged continuous flat luminaire.
• the driver is mounted inside the driver box on a surface that is opposing to the rear side of the body.
• the driver due to the mounting of the driver on a surface opposite to the rear side of the body, where the light source and thus a relevant heat emitter is arranged within, the heat removal of the driver and the light source is further separated.
• the driver box comprises a device carrier for mounting the driver and preferably also for mounting other electronic components, wherein the device carrier is mounted on an inner surface of the driver box.
• This implementation further provides heat guidance and removal structures, as within the driver box the device carrier may shield heat of nearby sidewalls of the driver box.
• assembly of the driver box is facilitated with a pre-assemblable device carrier only to be mounted inside the driver box as a unit.
• the device carrier is essentially U-shaped in a cross sectional view with the opening of the U-shape facing the rear side of the body.
• the rear side of the body comprises two thread channels extending parallel to the longitudinal extension axis, wherein the driver box has through holes arranged at edge areas of the driver box, wherein the driver box is mounted on the rear side of the body via mounting bolts arranged through the respective through-holes interacting with a thread of the respective thread channel.
• This allows for an easy, flexible but yet durable and stiff mounting of the driver box on the rear side of the luminaire housing.
• sections of the respective thread channels where no respective mounting bolt is placed are filled with a thread channel cover that may seal off the respective thread channel. With such an implementation the thread channels are further protected against outside influences, in particular in a harsh environment.
• the driver box has a main body forming a receiving space for receiving at least the driver and preferably other electronic components.
• the driver box is essentially U-shaped in a cross sectional view in a cross section perpendicular to the longitudinal extension axis. This provides a protective structure for components being placed inside the driver box.
• the driver box has a flange portion that extends outwardly forming a flange, wherein further optionally respective through-holes of the driver box are arranged in the flange portion. With such an implementation the structural stiffness is further improved and the mounting on the rear side of the body is further facilitated.
• the driver box is arranged centred along the longitudinal extension axis on the flat housing. This arrangement seems to be further beneficial with regard to aesthetics but also with regard to heat guidance and removal.
• the rear side of the body forms a cover of the driver box covering the receiving space of the driver box from the front side of the driver box.
• the rear side of the body i.e., the rear side facing surface of the luminaire housing covers the opening of the driver box, such that the driver box is closed off in a state mounted onside the luminaire housing.
• the luminaire housing respectively the body, hence has a dual function. Further optionally in-between the rear side of the body and the driver an air gap is present. With this implementation the heat removal separation is even further distinct.
• the driver box comprises a gasket that is configured to interact with the rear side of the body, and to seal the receiving space of the driver box from outside influences.
• the driver box is sealed and hence the components arranged inside the driver box are protected against ingress.
• the gasket may be configured to fully encircle the opening of the driver box that is closed off by the read side of the body when mounted on the luminaire housing.
• the driver box comprises a cable feed-through that is configured to feed a cable from an outside of the driver box to an inside of the driver box, where the receiving space is present. This further eases installation of the driver box and connection to mains power supply and/or other bus systems for control and communication of the flat luminaire.
• the driver box houses other electronic components, such as an energy storage, a communication module, and/or electrical connectors. This further increases versatility and flexibility of installation of the flat luminaire.
• the rear side of the body comprises a connector for electrically connecting the driver with the light source.
• the connector is configured as a connector through-hole with wires electrically interconnecting the driver with the light source, and/or via an electronic contact, preferably interacting with an electrical connector of the driver box, electrically interconnecting the driver with the light source.
• the flat housing is a profile body that comprises a structured profile surface on an outside of the body. This enlarges the surface area and thus aids in heat dissipation.
• the structured profile may be used for attachment of other components.
• the flat housing is formed by extrusion along the longitudinal axis, and is preferably made of a metal material, in particular made of aluminium.
• a metal material in particular made of aluminium.
• the flat housing is coated with a respective desired colour
• a white powder coat results in a further beneficial heat removal of the flat luminaire, and in particular of the flat housing and thus of the therein arranged light source.
• a white powder coat may additionally shield of heat generated by the driver inside the driver box, with the rear surface of the luminaire housing being used as a cover lid element of the driver box.
• the light source comprises a light module having multiple light emitting components, preferably such as LEDs, arranged on the light module. Further optionally the light source extends longitudinally along the extension axis. With this implementation a further beneficial illumination is provided, while also reducing a respective generated heat by the light sources.
• the light emission opening of the flat housing is closed off by a translucent front cover interacting with the body.
• the interior of the luminaire housing is protected to some degree against ingress, whereas furthermore it is conceivable that optical structures are arranged on the front cover for a respective desired lighting characteristic of the flat luminaire.
• the body comprises holding structures at a lateral edge of the body in vicinity to the light emission opening for holding the translucent front cover, whereas the translucent front cover comprises corresponding holding structures, for a form-fit interaction with the body.
• the fixture of the front cover is designed utmost durable but yet simple to install.
• the flat luminaire comprises mounting clips for clamping the translucent front cover to the body, whereas preferably the mounting clips are each attached to the body via a threaded bolt that interacts with a respective thread channel of the body.
• This implementation may be used for flat luminaires that are arranged in a rough environment where physical impacts of foreign objects on the flat luminaire are to be expected - e.g., in a sport stadium, a gymnasium, and in particular in an indoor tennis court, soccer court or the like - as with this setup the cover is further secured at the luminaire housing.
• the flat housing comprises a sealing gasket that is attached to the body at respective gasket holding structures on the inside of the body, whereas the front cover, is configured to interact with the sealing gasket sealing off the light source mounting space from outside influences.
• the front side of the flat luminaire, and in particular the front side of the flat luminaire housing is even further protected against ingress, such as dust, water or moisture, so that the components arranged on the inside of the flat luminaire housing are protected, and operability of the flat luminaire is secured even in harsh environments.
• the flat luminaire further comprises an optical setup that comprises the front cover and preferably an optical arrangement (e.g., a reflector arrangement and/or a lens arrangement) having optical elements (e.g., lenses and/or reflectors), whereas each optical element is assigned a respective light emitting component of the light module of the light source.
• an optical arrangement e.g., a reflector arrangement and/or a lens arrangement
• optical elements e.g., lenses and/or reflectors
• each optical element is assigned a respective light emitting component of the light module of the light source.
• the translucent front cover may comprise contacting structures that are configured to fixedly clamp the optical arrangement to the light source; or the optical setup comprises clip elements that interact with a portion of the mounting surface of the body and with the optical arrangement, whereas the clip elements are configured to fixedly clamp the optical arrangement to the light source.
• the optical arrangement is securely fixed inside the luminaire housing.
• the configuration with the additional clip elements may be used in a scenario where vibrations to the flat luminaire are possible,
• the optical setup material comprises plastic, in particular polycarbonate, PC, or glass.
• the used material may hereby also differ based on the respective scenario, whereas a plastic or polycarbonate material may be used where impacts of other objects may be possible.
• a glass material may be used in scenarios where a higher corrosion resistance of the flat luminaire is desired.
• the flat luminaire comprises at least one end cap at a front side end of the flat housing for closing off the inside of the flat housing from the respective front end, whereas the respective at least one end cap is attached to the body, possibly via attachment screws, whereas the attachment screws may interact with a respective threaded hole profile of the body.
• the sides of the flat housing are also closed off providing a further increase of ingress protection.
• the respective at least one end cap comprises an end cap gasket that is positioned inside the respective end cap for sealing off the inside of the flat housing from the front ends. This further increases the level of ingress protection.
• the at least one end cap comprises projecting structures that are configured to apply pressure to the end cap gasket in sections where the end cap gasket is in direct contact with the body.
• these features on the inside facing surface of the end cap further increase the sealing level, whereas hereby the sealing is further improved by applying pressure to the end cap gasket between flat luminaire housing and the respective endcap, in particular through the respective structures.
• the end cap gasket is made out of solid silicon material, and/or the end cap gasket comprises structures corresponding to the projecting structures of the end cap. This further is beneficial with regard to the ingress protection of the luminaire.
• the end cap may be formed by a material comprising polyamide.
• the flat luminaire further comprises a functional box attached at a front side end of the flat housing axially extending from a longitudinal extension axis face side of the flat housing, whereas the functional box comprises a blank cover or a functional element, whereas the functional element preferably comprises one of a sensor, a lighting control device, a battery, a wireless control module, or any combination thereof, whereas the functional element is positioned inside the functional box and/or on a front facing surface of the functional box.
• electronic components usually or previously placed inside the driver box can be outsourced to the functional box, improving separation of heat generation of the flat luminaire.
• versatility of the flat luminaire is improved, as with additional functional elements, such as sensors, batteries etc. other use-cases are achievable.
• the functional box comprises a connector at a side face of the functional box facing the flat housing for electrically connecting a respective functional element with the light source and/or with the driver, whereas preferably the connector is configured as:
• the functional box comprises a top case part and a bottom case part that may be attached together via screw elements, whereas the top case part forms a rear side facing surface and the bottom case part forms a front side facing surface, whereas the top case part and the bottom case part may form a functional element receiving space inside the functional box.
• the functional box comprises an opening lid that opens to the front side of the flat luminaire, and wherein preferably the opening lid is formed at the bottom case part, wherein further optionally the opening lid may be removable providing a through opening for a respective functional element of the functional box. This further eases installation and maintenance of the functional box, the functional element and thus of the flat luminaire as a whole.
• a seal gasket is arranged, sealing the connection between the functional box and the flat housing from outside influences, whereas further optionally the seal gasket may be identical to the previously discussed end cap gasket.
• the seal gasket is made out of solid silicon material. This further enhances ingress protection of the flat luminaire as a whole.
• the seal gasket, respectively the end cap gasket may be arranged on both end side faces of the flat luminaire, respectively of its flat housing, to achieve a further beneficial sealing.
• the functional box is made of a material comprising polyamide.
• the functional box is resistant to outside influences and provides sufficient protection for the components arranged on an inside of the functional box.
• the functional box is formed by injection molding. This further eases production and is also a cost effective.
• the flat luminaire comprises two of the functional boxes, wherein the functional boxes are attached on opposite axial face sides of the flat housing.
• the flat luminaire comprises at least two suspensions for mounting the flat luminaire to a respective wall, ceiling or a respective string, via a respective mount attachment surface.
• each suspension may comprise a clamping structure for a, in particular reversible, form-fit coupling, and in particular for a snap-in coupling, with the structured profile surface on the outside of the body. This further eases assembly and installation of the flat luminaire, while providing a durable mounting.
• the suspension is flexibly repositionable on the body parallel to the longitudinal extension axis. This increases versatility of mounting scenarios of the flat luminaire, whereas individual adaptions concerning a respective weight imbalance or the like can be easily adjusted with the repositioning of the suspensions.
• materials used for gaskets and seals or the like discussed in the disclosure may be cellular rubber; foam rubber; polyethylene; silicone; ethylene propylene diene rubber, EPDM; and or polytetrafluoroethylene, PTFE. With these materials different requirements concerning respective illumination situations can be met. Thus, sealing of the luminaire is further improved.
• the housing may be sealed satisfying a certain ingress protection class, such as, e.g., IP4x, IP5x, IP6x, IPx4, IPx5, IPx6, IPx7, IPx8 (with x being a placeholder).
• IP ratings up to a classification of preferably IP 66 are realizable. However, certainly even higher ratings (such as, e.g. IP 67 or IP 68 or the like) are also conceivable.
• Figure 3 shows various exemplary embodiments of a flat luminaire 1, whereas the shown implementations are not a complete list, but clearly indicate possible variations of respective embodiments.
• the Figures 1 and 2 show different views of a same exemplary embodiment of a flat luminaire 1, whereas the therein illustrated embodiment is known as the exemplary embodiment ii of Figure 3 .
• the flat luminaire 1 comprises a flat housing 300, and one functional box 600 that is coupled to the housing 300 via a side face of the housing 300.
• the luminaire 1 comprises a driver box 400, that is mounted on the rear side R of the luminaire 1, and hereby in particular on the rear side R of the housing 300.
• the side of the luminaire 1 opposing the rear side R is labelled as the front side F, whereas this labelling is equally valid with regard to individual components of the luminaire 1.
• the driver box 400 has a respective rear side R and a respective front side F.
• Figure 4 exemplary shows the driver box 400 from its front side visualising an exemplary arrangement of the inside I of the driver box 400
• Figure 7 shows a detail view of the attachment of a driver box 400 on the body 310 of the flat housing 300, as well as attachment elements, e.g. suspensions 700 for mounting the luminaire 1 on a wall, ceiling or the like.
• Figure 8 shows the configuration of an exemplary embodiment of a flat luminaire 1 in a view on a side surfaces of the longitudinal luminaire 1, showing the driver box 400 being mounted on the rear side R of the housing 300 and the components (such as, e.g., the light source 100, optical setup 500 with front cover 530 and optical arrangement 520, sealing gasket 515) being arranged inside the housing 300 and components attached to the body 310.
• the components such as, e.g., the light source 100, optical setup 500 with front cover 530 and optical arrangement 520, sealing gasket 515) being arranged inside the housing 300 and components attached to the body 310.
• an exemplary embodiment of the luminaire 1 is shown in a heat map illustration during operation of the luminaire 1, whereas the therein shown configuration is similar to the exemplary embodiment iv of Figure 3 .
• Figure 6 shows an exemplary embodiment of a flat luminaire 1 in an exploded view, whereas the displayed implementation is also known from the exemplary embodiment iii of Figure 3 .
• Figures 9A, 9B, 9C , 10A, 10B and 11 show different views of different exemplary implementations of the luminaire 1 detailing on the coupling and arrangement of the optical setup 500 with the housing 300.
• Figures 10A and 10B show an angled view on the exemplary schematic known from Figure 9B
• Figure 11 shows a respective angled view on the exemplary schematic known from Figure 9C .
• Figure 12 gives an exemplary detail view on an exemplary implementation of a functional box 600 being attached to the housing 300.
• Figure 13 focuses on an exemplary implementation of end caps 800 being mounted on a side surface of an exemplary embodiment of the housing 300 with an exemplary end cap gasket 815 being arranged in-between. Characteristics shown or described with regard to one of the exemplary embodiments disclosed herein are also transferable to other exemplary embodiments.
• the flat luminaire 1 extends longitudinally along the extension axis L.
• the luminaire 1 has a rear side R and a front side F respectively extending longitudinally along the extension axis L at opposite sides of the extension axis L.
• each component of the flat luminaire 1 can be assigned a respective front side F and rear side R, corresponding to the described front side F and rear side R of the luminaire 1.
• a driver 200 for driving the light source 100 of the luminaire 1 is positioned.
• the driver 200 is mounted on an inside surface of the driver box 400, wherein the driver box 400 is mounted on the rear side R of the body 310.
• the flat housing 300 hereby defines a light source mounting space 301 for mounting and housing the light source 100, wherein the housing 300 extends longitudinally along the extension axis L, and wherein the housing 300 has a body 310, whereas the light source 100 is mounted to the body 310 inside I the flat housing 300 at a surface of the body 310 facing the front side F, and a light emission opening 320 for emitting light of the light source 100 being housed in the housing 300 at the front side F.
• the body 310 hereby also forms the rear side R of the housing 300.
• the light emission opening 320 of the flat housing 300 is hereby closed off by a translucent front cover 530 (respectively a lens cover 530) interacting with the body 310.
• the front cover 530 forms a light emission section of the luminaire 1 that is essentially formed plate-shaped, having a main area that is plate-shaped, and that covers the light emission opening 320 of the housing 300 on the front side F, and thus closes off the body 310, respectively the housing 300, at the front side F.
• the front cover 530 may hereby be part of an optical setup 500.
• the optical setup 500 may further comprise, as shown in more detail in Figures 5 , 6 , 8 , 9A, 9B, 9C , 10A, 10B and 11 , an optical arrangement 520 having optical elements 510, whereas each optical element 510 is assigned a respective light emitting component 111 of the light module 110 of the light source 100.
• the elements 510 can also be implemented as other optical elements 510, such as a lens 510 and/or a reflector 510 or the like.
• the optical setup 500 may be formed from a glass or plastic material, in particular polycarbonate, PC.
• the driver box 400 may essentially cover the entire rear side R of the flat housing 300, whereas also other implementations are conceivable, as exemplarily illustrated in Figure 3 , where the dimension of the driver box 400 along the longitudinal axis L, i.e. the driver box 400 length, may be (much) smaller than the dimension of the flat housing 300 along the longitudinal axis L, i.e. the length of the housing 300.
• the driver box 400 is hereby mounted on the rear side R of the body 310 via mounting bolts 390 (possibly realized as screws, threaded bolts or the like), that engage with respective through-holes 495 of the driver box 400 and interact with a respective threaded hole 395 of the body 310 and thus fixedly mechanically connect the driver box 400 with the flat housing 300.
• the driver box 400 may also be arranged centred along the longitudinal extension axis L on the flat housing 300 (see, e.g., exemplary embodiments i, ii, iii, iv and vi of Figure 3 ).
• the luminaire 1 comprises multiple drivers 200, and thus multiple driver boxes 400
• a setup where the driver box 400 may also be arranged centred along the longitudinal extension axis L on the flat housing 300 is not possible, however here a setup of the luminaire 1 being essentially mirror-symmetric with regard to a mirror axis/mirror plane being perpendicular to the longitudinal extension axis L is conceivable (see, e.g., exemplary embodiment v of Figure 3 ).
• the driver box 400 has a main body 412 forming a receiving space 401 for receiving at least the driver 200 and other electronic components 250, 290 (such as a communication module 250, and/or electrical connectors 290).
• the driver box 400 is essentially U-shaped in a cross sectional view in a cross section perpendicular to the longitudinal extension axis L, wherein the driver box 400 comprises a flange portion 411 that extends outwardly from the main body 412 forming a flange, wherein furthermore the aforementioned through-holes 495 of the driver box 400 are arranged in the flange portion 411.
• the driver box 400 comprises a device carrier 420 for mounting the driver 200.
• the device carrier 420 is essentially U-shaped in a cross sectional view with the opening of the U-shape facing the rear side R of the body 310. It is also conceivable that the device carrier 420 is merely plate shaped, or may have an L-shape.
• the device carrier 420 is mounted on an inner surface of the driver box 400, wherein the device carrier 420 may in particular be mounted inside the driver box 400 on a surface that is opposing to the rear side R of the body 310.
• the driver 200 may hereby be directly mounted to the driver box 400 or may be mounted onside the device carrier 420, wherein in the driver 200 is preferably mounted on a surface that is opposing to the rear side R of the body 310.
• the housing 300 may comprise thread channels 395 extending parallel to the longitudinal extension axis L on the rear side R of the body 310.
• the housing 300 hereby comprises in particular two thread channels 395 on two edge areas of the rear side R of the housing 300 along the longitudinal extension axis L. These thread channels 395 further facilitate assembly of the luminaire 1.
• the driver box 400 may be coupled to the housing 300 via threaded mounting bolts 390 interacting with a respective thread channel 395.
• the driver box 400 has through holes 495 arranged at edge areas of the driver box 400 - and in particular at the flange portion 411 of the driver box 400, wherein the mounting bolts 390 are arranged through the respective through-holes 495 interacting with a thread of the respective thread channel 395.
• other components such as mounting clips 350 for a stiffened structure of the front cover 530 connection, may be fixated via a connection with the thread channels 395, as in particular shown in Figures 9B, 9C , 10A, 10B and 11 .
• the driver box 400 being directly mounted on the rear side R of the body 310, respectively of the housing 300, and the body 310, respectively the housing 300, acting as a cover for closing off the driver box 400, for further improvement of heat generation separation and thus a more efficient heat removal, in-between the rear side R of the body 310 and the driver 200 an air gap is present. This further separates heat removal paths.
• the rear side R of the body 310 comprises a connector for electrically connecting the driver 200 with the light source 100.
• a connector is not shown in the provided figures, whereas exemplarily the following implementations are conceivable, that may be implemented as alternatives or in combination:
• a gasket 415 that is arranged in-between the driver box 400 and the housing 300 is used. This gasket 415 thus interacts with both the driver box 400 and the rear side R of the body 310, and is hereby configured to seal off the receiving space 401 of the driver box 400 from outside influences.
• threaded channels 395 it is further exemplary conceivable that sections of the respective thread channels 395 where no respective screw or bolt is to be placed are filled with a thread channel cover, that may in particular be configured to seal off the respective thread channel 395, this exemplary implementation is not shown in the Figures.
• the driver box 400 may comprise a cable feed-through 480 that is configured to feed a cable from an outside O of the driver box 400 to an inside I of the driver box 400, where the receiving space 401 is present.
• a cable feed-through 480 that is configured to feed a cable from an outside O of the driver box 400 to an inside I of the driver box 400, where the receiving space 401 is present.
• connections from an external entity to the driver 200, or the other electrical components 250, 290 of the driver box 400 may be realized.
• the flat housing 300 may be a profile body that comprises a structured profile surface on an outside O of the body 310, whereas the flat housing 300 may further be formed by extrusion along the longitudinal axis L.
• metal is a preferred choice for material selection.
• the housing 300 is coated with a powder coat, which possibly can be of any desired colour.
• powder coating with a white powder coat further improved thermal characteristics of the luminaire 1.
• the body 310 comprises structured side walls running parallel to the extension axis L.
• the light source 100 extends longitudinally along the extension axis L.
• the light source 100 may comprise a light module 110 having multiple light emitting components 111, preferably such as LEDs, arranged on the light module 110.
• the light source 100 is arranged on a mounting surface 312 of the body 310.
• the mounting surface hereby protrudes into the light source mounting space 301 of the housing 300, such that the mounting surface 312 is not directly placed onside an inner surface wall of the body 310, but is connected to the body 310 via extension surfaces 311 that essentially protrude into the light source mounting space 301.
• the general extension direction of a respective extension surface 311 is essentially perpendicular to the extension direction of the respective mounting surface 312.
• the mounting surface 312 is a surface attached to an extension surface 311 of the body 310 that projects inside the flat housing 300, whereas the extension surface 311 separates the mounting surface 312 from a back wall of the body 310 that forms the rear side R of the body 310.
• This back wall of the body 310 hence is coupled to the extension surfaces 311 on the inside I of the housing 300 and coupled to the driving box 400 on the outwardly O facing rear side R thereof.
• the mounting surface 312 forms a surface facing the front side F, so that the light source 100 being placed thereon emits light towards the front side F, i.e., towards the light emission opening 320.
• the flat luminaire 1 may comprise at least one end cap 800 at a front side end of the flat housing 300 for closing off the inside I of the flat housing 300 from the respective front end, whereas the respective at least one end cap 800 is attached to the body 310, in particular via attachment screws 890, whereas hereby the attachment screws 890 interact with a respective threaded hole profile 316 of the body 310.
• Such an exemplary embodiment of an end cap 800 assembly is shown in Figure 13 .
• the end cap 800 is hereby ideally equipped with an end cap gasket 815 that is positioned inside the respective end cap 800 for sealing off the inside I of the flat housing 300 from the front ends, whereas the at least one end cap 800 comprises projecting structures that are configured to apply pressure to the end cap gasket 815 in sections where the end cap gasket 815 is in direct contact with the body 310, when mounted to the housing 300.
• the end cap gasket 815 comprises structures corresponding to the projecting structures of the end cap 800.
• the end cap gasket 815 may be made out of solid silicon material.
• the flat luminaire may also comprise a functional box 600 attached at a front side end of the flat housing 300 axially extending from a longitudinal extension axis face side of the flat housing 300.
• a functional box 600 comprises a blank cover or a functional element 660.
• the blank cover can hereby be used as a placeholder for a potential integration of a functional element 660 in a future illumination scenario of the luminaire 1.
• the functional element 660 does not necessarily have to be directly visible, as it can be fully integrated inside the functional box 600.
• the functional element 660 projects from the functional box 600 or is placed onside the functional box 600, i.e., the functional element 660 may be positioned inside the functional box 600 and/or on a front F facing surface of the functional box 600.
• the functional element 660 may be implemented as a sensor, a lighting control device, a battery, a wireless control module, or any combination thereof.
• further exemplary implementations of the functional element 660 are to be described.
• the functional element 660 may in particular be at least one of a High-Frequency, HF, sensor, a microwave, MW, sensor (in particular a MW sensor with changeable frequency), a battery compartment including a battery (possibly also including a battery charger device), an emergency lighting module (in particular a 3-hour emergency lighting module, possibly including dimming capabilities and/or a DALI interface), a passive infrared sensor (possibly with an integrated daylight sensor).
• the luminaire 1 comprises two functional boxes 600, wherein each functional box 600 comprises a same or different functional element 660, enhancing versatility of the luminaire 1.
• the functional box 600 may comprise a connector 610 at a side face of the functional box 600 facing the flat housing 300 for electrically connecting a respective functional element 660 with the light source 100 and/or with the driver 200.
• the connector 610 may be realized via a connector through-hole with wires electrically interconnecting the respective functional element 660 with the light source 100 and/or with the driver 200.
• the connector can also be realized via an electronic contact, preferably interacting with a corresponding electrical connector of the flat housing 300, electrically interconnecting the respective functional element 660 with the light source 100 and/or with the driver 200.
• the functional box 600 comprises a top case part 680 and a bottom case part 670 attached together via screw elements 690, whereas the top case part 680 forms a rear side R facing surface and the bottom case part 670 forms a front side F facing surface.
• the top case part 680 and the bottom case part 670 form a functional element receiving space inside the functional box 600, where one or more functional elements 660 may be positioned.
• the functional box 600 may comprise an opening lid that opens to the front side F of the flat luminaire 1, and wherein the opening lid may in particular be formed at the bottom case part 670.
• the opening lid may be removable providing a through opening for a respective functional element 660 of the functional box 600 to project from the inside I of the functional box 600 to the outside O thereof.
• a seal gasket 615 in-between the functional box 600 and the flat housing 300, providing a respective ingress protection by sealing the connection between the functional box 600 and the flat housing 300 from outside influences.
• the seal gasket 615 is identical to the end cap gasket 815.
• the seal gasket 615 is made out of solid silicon material.
• two of the functional boxes 600 are arranged on respective opposite side ends of the housing 300, i.e., the functional boxes 600 are attached on opposite axial face sides of the flat housing 300.
• implementations of the luminaire 1 with two end caps 800 at respective front ends of the housing 300 are conceivable. Also a combination thereof, with one end cap 800 and one functional box 600 are realizable.
• the flat luminaire 1 may comprise two suspensions 700 for mounting the flat luminaire 1 to a respective wall, ceiling or a respective string, via a respective mount attachment surface 710, whereas hereby each suspension 700 may comprise a clamping structure 720 for a, preferably reversible, form-fit coupling, and preferably for a snap-in coupling, with the structured profile surface on the outside O of the body 310.
• the clamping structures 720 are arranged on opposite ends of the bow-shaped suspension 700, as clearly shown in Figures 1, 2 , 3 , 6 , 7 and 8 .
• the suspension 700 may be flexibly repositionable on the body 310 parallel to the longitudinal extension axis L, so that different installation scenarios are realizable.
• the luminaire 1 is implementable in various configurations with regard to its dimensions and components.
• the housing 300 may have different lengths (dimension along the longitudinal extension axis L), whereas this is in particular easily achievable with a housing 300 being produced via extrusion molding.
• the suspensions 700 can be easily placed according to respective needs.
• different light sources 100 may be implemented, possibly raising the need for a second driver 200, and hence a second driver box 400, as exemplary shown in embodiment v of Figure 3 .
• the luminaire 1 may comprise (at least) one functional box 600, possibly equipped with a functional element 660.
• a setup of a luminary system 1000 is conceivable, whereas at least two luminaires 1 are connected to one another via an accessory plate 900, forming one enlarged continuous flat luminaire.
• the respective accessory plate 900 is arranged on the rear side R of the respective bodies 310 of the respective (at least) two flat luminaires 1.
• This plate 900 may hereby be coupled to the luminaires 1 via screws that preferably are configured to interact with the thread channels 395 of the respective two flat luminaires 1.
• the accessory plate 900 comprises wire mounts configured to hold respective wires and cables interconnecting the respective at least two flat luminaires 1, and in particular the respective at least two drivers 200 of the at least two flat luminaires 1.
• the accessory plate 900 comprises wire mounts configured to hold respective wires and cables interconnecting the respective at least two flat luminaires 1, and in particular the respective at least two drivers 200 of the at least two flat luminaires 1.
• the configuration and assembly of components inside the housing 300 may differ based on respective requirements of the luminaire 1.
• the light emission section respectively the light emission opening 320 and a therein arranged optical setup 500 with the front cover 530 and optical arrangement 520 having optical elements 510, are displayed. While overall being in general similar to one another the main differences between the therein shown different implementations are the specific configuration of respective structures and elements for holding the optical setup 500 in place.
• Figures 8 and 9A show a configuration of an integral formed translucent cover 530 having contacting structures 531 that are laterally positioned and are an integral part of the respective plate-shaped main area of the cover 530.
• the setup of the housing 300, the optical setup 500 and preferably also the light source 100 essentially are symmetrical with regard to the longitudinal extension axis L forming a mirror plane.
• these contacting structures 531 protrude inwardly into the inside I of the housing 300, i.e., these contacting structures 531 protrude towards the light source mounting space 301.
• These contacting structures 531 are hereby configured to get in contact with the optical arrangement 520 to push the optical arrangement 520 towards the light source 100 and to fixedly clamp the optical arrangement 520.
• This pressure applied to the optical arrangement 520 via the contacting structures 531 by the front cover 530 may be further used to hold and fixedly position the light source 100 in its place inside the housing 300 on the respective mounting surface 312 of the body 310.
• a positioning element 550 may be implemented with the optical arrangement 520 to apply - possibly together with the optical elements 510 (e.g., lenses 510, reflectors 510) - a pressure on the light source 100.
• the front cover 530 comprises holding structures 533, 534 that are also laterally positioned and are an integral part of the respective plate-shaped main area of the cover 530, whereas these holding structures 533, 534 interact with respective holding structures 315 that are each present at a lateral edge of the body 310 in vicinity to the light emission opening 320.
• the holding structures 533, 534 clamp the front cover 530 with the body 310.
• the element 534 respectively forms an edge section of the plate-shaped main area of the cover 530 and is pressed towards the respective holding structures 315 of the body 310 due to the clamp element 533 being in contact with and applying a force on an opposing surface of the holding structures 315 of the body 310.
• the holding structures 315 may further be configured to prevent a lateral movement of the front cover 350 such that the cover 350 is fixedly hold. This may be implemented via a stepped structure of the holding structure 315, as shown in particular in Figures 8 to 11 . Hence, via the holding structures 315 of the body 310 and the corresponding holding structures 533, 534 of the front cover 530 a form-fit interaction with the body 310 is realized.
• the luminaire 1, and in particular the flat housing 300 further comprises a sealing gasket 515 that is attached to the body 310 at respective gasket holding structures 314 on the inside I of the body 310, whereas the front cover 530, is configured to interact with the sealing gasket 515 sealing off the light source mounting space 301 from outside influences.
• the sealing is performed by the elongated sealing gasket 515 by interaction with the front cover 530, respectively with a dedicated section of the front cover 530.
• this sealing is performed via respective sealing structures 532 that are an integral part of and laterally positioned on the plate-shaped main area of the front cover 530.
• sealing structures 532 protrude inwardly into the inside I of the housing 300, and are thus arranged on a rear side R of the front cover 530. Hence, the sealing via interaction between the respective sealing structures 532 and the sealing gasket 515 is performed on an inside I of the housing 300.
• the sealing structures 532 are hereby preferably also configured elongated and extend over the whole dimension of the sealing gasket 515 to achieve a most preferable effective sealing.
• Figure 9A essentially matches the setup of Figure 8 , whereas the therein shown embodiment does not comprise such dedicated sealing structures 532 protruding inwardly. Furthermore, the sealing gasket 515 is also arranged at a lateral edge of the body 310 in vicinity to the light emission opening 320, whereas the gasket holding structures 314 and the holding structures 315 of the body 310 are moved closer together and are essentially combined.
• the implementation of the contacting structures 531 interacting with the optical arrangement 520 is essentially same, whereas the shown configuration visualizes that a respective dedicated contacting structure 531 and clamp element 533 protrude from a same side of an essentially same area of the front cover 530 with different angulated directions (the contacting structure 531 angulated inwardly facing towards the optical arrangement 520, and the clamp element 533 angulated towards the lateral side walls of the body 310, where the respective structures 314 and 315 of the body 310 are present).
• the flat luminaire 1 comprises additional mounting clips 350 for an additional clamping of the translucent front cover 530 to the body 310.
• the mounting clips 350 are each attached to the body 310 via a threaded bolt 355 (or a screw or the like) that interacts with a respective thread channel 395 of the body 310.
• Each clip 250 is hereby configured to apply a pressure on the front cover 350, therefore additionally supporting the fixation of the front cover 350.
• a respective sufficient number of clips 350 per side of the cover 530 Depending on the length of the luminaire 1 it may be desired to use a respective sufficient number of clips 350 per side of the cover 530, whereas, e.g., in an implementation of Figure 3 embodiments i, ii a total number of four clips (two clips per side) is sufficient, whereas with an increasing length an increased number (e.g., total of six, eight, or ten clips 350 or the like ) of clips 350 may be desired (e.g., embodiments iv, v: total of eight clips).
• These clips 350 achieve a further stiff attachment of the front cover 530, respectively of the optical setup 500 to the housing 300. This is especially desired in scenarios where a physical impact to the luminaire is to be expected, e.g., in ball sport surroundings or the like.
• the optical setup 500 and in particular the front cover 530, is formed by an impact-resistant (or impact-proof) material, such as plastic, e.g., polycarbonate.
• an impact-resistant (or impact-proof) material such as plastic, e.g., polycarbonate.
• the Figures 10A and 10B provide a different perspective to the implementation of the interior of the housing 300 and the coupling with the optical setup 500, as well as the additional mounting clips 350 being attached to the housing 300.
• the edge section 534 of the cover 530 still acts as a holding structure being in contact with the body 310, and in particular being in contact with the respective structures 314 and 315, and therefore also with the sealing gasket 515
• the cover 250 here is solely attached to the housing 300 via the aforementioned mounting clips 350, that are preferably attached to the housing 300 via a threaded bolt 355 (or a screw or the like) that interacts with a respective thread channel 395 of the body 310.
• These clips 350 hold the plate-shaped main area of the front cover 530 in place by pushing the respective edge section 534 towards the interior I of the housing 300, and thus towards the gasket 515.
• the optical setup 500 here further comprises clip elements 537 that interact with a portion of the mounting surface 312 of the body 310 and with the optical arrangement 520, as shown in particular in Figures 9C and 11 .
• the clip elements 537 are configured to fixedly clamp the optical arrangement 520 to the light source 100
• the optical setup 550 may comprise a respective positioning element 550 that holds and positions (together with the optical arrangement 520, respectively the optical elements 510) the light source 110 in place onside the mounting surface 312.
• the Figure 11 provides a different perspective to the implementation of the interior of the housing 300 and the coupling with the optical setup 500, as well as the additional mounting clips 350 and clip elements 537 being attached to the housing 300.
• the clip 350 may be either mounted to the driver box 400 (e.g., mounted onside the flange portion 411) or may be mounted in-between the driver box 400 and the rear side R of the housing 300.
• each of the shown exemplary embodiments of the optical setup 500 of Figures 9A to 11 fit the same housing 300, such that a flexible configuration of the respective luminaire 1 is possible.
• the driver box 400 is made of plastic material, as well as the functional box 600 also being made of a material comprising polyamide. Further, the functional box 600 may be formed by injection molding.
• a luminaire 1 that each aim at improving heat removal and thus also operational flexibility of the luminaire 1.
• embodiments of the luminaire 1 are presented, that comprise respective configurations regarding the thermal separation of individual components.
• hot spots such as light source 100 and its heat sink the housing 300, and the driver 200
• configurations for improving sealing of the luminaire 1 are provided as well as configurations for further improving assembly and mounting of the luminaire 1.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
• Fastening Of Light Sources Or Lamp Holders (AREA)

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Citations (6)

• 2024
  • 2024-02-29 EP EP24160604.5A patent/EP4610558A1/fr active Pending
  • 2024-11-25 EP EP24215052.2A patent/EP4610560A1/fr active Pending
• 2025
  • 2025-01-23 DE DE202025100330.9U patent/DE202025100330U1/de active Active

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