WO2024256963A1 - Panneau pouvant être éclairé par l'arrière - Google Patents

Panneau pouvant être éclairé par l'arrière Download PDF

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Publication number
WO2024256963A1
WO2024256963A1 PCT/IB2024/055704 IB2024055704W WO2024256963A1 WO 2024256963 A1 WO2024256963 A1 WO 2024256963A1 IB 2024055704 W IB2024055704 W IB 2024055704W WO 2024256963 A1 WO2024256963 A1 WO 2024256963A1
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WO
WIPO (PCT)
Prior art keywords
screen
panel
lightable
face
connectors
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.)
Ceased
Application number
PCT/IB2024/055704
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English (en)
Inventor
Francesco Santini
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.)
Individual
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Individual
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Filing date
Publication date
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Publication of WO2024256963A1 publication Critical patent/WO2024256963A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • F21Y2103/20—Elongate light sources, e.g. fluorescent tubes of polygonal shape, e.g. square or rectangular
    • 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
    • F21Y2105/14—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array
    • F21Y2105/16—Planar light sources comprising a two-dimensional [2D] array of point-like light-generating elements characterised by the overall shape of the two-dimensional [2D] array square or rectangular, e.g. for light panels

Definitions

  • the present invention relates to a panel lightable from the rear .
  • the panel lightable from the rear according to the invention finds particular application in the field of building fini shes , furniture , and lighting technology .
  • Recessed lighting systems for closed environments such as spotlights , installed in plasterboard false ceilings , are widely used, but it is not uncommon to find them also recessed into floors or in the body of uprights , thus creating one or more light points contained in the footprint of the architectural element that receives them .
  • partition wall solutions illuminated by a light beam generated by one or more spotlights recessed into the ceiling or floor near the partition wall , which then acts as a reflective element of the arti ficial light .
  • the Italian patent for invention No . 102017000132494 filed in the name of the same Applicant , describes a process for making screens for panels lightable from the rear starting from panels of materials such as wood, marble or stone .
  • the process involves numerically controlling the creation of grooves in a panel of material , filling them with transparent binding material , and subsequently reducing the thicknes s of the panel by removing opaque material under the grooves until the transparent filling and binding material is exposed .
  • 102020000019348 filed in the name of the same Applicant , describes an alternative method for locally varying the optical properties of a material , obtaining a panel that may be used as a screen in panels lightable from the rear .
  • the panel thus made (when lighted from the rear ) becomes a screen because locally it allows the passage of the light wave and is hidden from view when not in use .
  • Panels lightable from the rear having features comparable to those obtainable with the above method are described in W02007 / 081254A1 , ITUD20110200A1 and DE20303610U1 .
  • the common denominator of the family of patents referred to above is the local reduction of the thickness of the panel in favor of the passage of the light wave and therefore the local loss of the original continuity of the panel ; compensation is achieved by filling the groove with a transparent binder and/or by coupling the panel in which the grooves are located to a transparent solid support . .
  • filling the groove with transparent binder allows a restoration of any original mechanical performance of the panel which, in any case , depends , in relation to bending, on its thickness ; therefore, in order to increase the bending strength, in the case of filling the groove with a transparent binder, it is stil l necessary to increase the thickness of the panel and consequently the depth or length of the groove , with unfavorable optical consequences .
  • the coupling with a transparent support presents the well-known problem related to the negative response of a coupled element to a thermal and/or hygrometric shock, a problem that is inevitable in a lighting system where the heat resulting from the operation of the LEDs is produced and accumulated .
  • the measurement of the bending strength that the transparent support body of fered always depends on the thickness of said transparent support body .
  • the aforesaid panels lightable from the rear may be equipped with LED-type light sources , positioned according to two possible distribution schemes : edge-lit and back-lit .
  • the light sources A are distributed perimetrically along the support frame T .
  • the light is brought behind the screen F by means of light guides G .
  • the screen has been constrained only perimetrically by means of the perimeter support frame to prevent further connections from being the cause of either light interference in the propagation of the light or small light defects due to the perforation of the transparent body of the light guide in the case of the edge-lit scheme .
  • a screen i f constrained only perimetrically, thus reaches thicknesses that i f on the one hand ensure stability, on the other cause anchoring problems related to weight and lighting performance problems related to the thickness of said screen .
  • K is the thermal expansion coef ficient
  • LI is the initial length
  • AT is the change in temperature
  • a further requirement is therefore to create screens by coupling di f ferent materials while reducing the aforesaid phenomena of torsion and detachment between di f ferent materials in the presence of thermal stress .
  • the main obj ect of the present invention is to eliminate in whole or in part the drawbacks of the aforementioned prior art by providing a panel lightable from the rear that may be made with a screen with large surface dimensions and at the same time that maintains adequate mechanical strength without necessarily having to have increased screen thicknesses .
  • a further obj ect of the present invention is to provide a panel lightable from the rear that allows for the correction/masking of any light interference or defects in the light distribution .
  • a further obj ect of the present invention is to provide a panel lightable from the rear which, with the same mechanical resistance to bending and luminous power applied to the source , may of fer superior luminous ef ficacy exiting the screen .
  • a further obj ect of the present invention is to provide a panel lightable from the rear which is simple to manufacture .
  • a further obj ect of the present invention is to provide a panel lightable from the rear which has a screen that is less subj ect to deformation due to thermal stress .
  • FIG. 1 is a sectional view of a known type of panel lightable from the rear made in the edge-l it configuration;
  • FIG. 2 is a sectional view of a known type of panel lightable from the rear made in the back-l it configuration
  • FIG. 3A and 3B are two sections of a panel lightable from the rear according to two alternative embodiments of the invention, relating to an edge-lit and back-lit configuration, respectively;
  • FIG. 3C is a perspective view of a panel lightable from the rear, according to one embodiment of the invention.
  • FIG. 5 schematically shows the effects of the thickness of a screen on the amount of light exiting from an optical channel for the same light source ;
  • FIG. 6 schematically shows the relationship between the area of a connector and the total area of the screen
  • FIG. 7 schematically shows the phenomenon of the di f fusive transmission of light through a material
  • FIG. 8 to 18 schematically show di f ferent ways of positioning the connectors in a panel lightable from the rear according to the invention
  • FIG. 19 a-b show two di f ferent types of connectors that may be used in a panel lightable from the rear according to the invention
  • FIG. 20 is a section of a panel lightable from the rear according to the invention shown with a connector having an enlarged portion;
  • the panel lightable from the rear 1 comprises a screen that may be lighted from the rear 10 defined by a plate of a predef ined material .
  • the predefined material of which the panel is made is able to transmit the light crossing it in a di f fuse manner thanks to its physical features and/or a reduction in its thickness .
  • the aforesaid predefined material may be chosen from the group consisting of marble , wood, resin, opalines .
  • the screen that may be lighted from the rear 10 has a first face 11 , facing the outside of the panel 1 and intended to be visible , and a second face 12 , opposite to the first , facing the inside of the panel 1 and therefore not vi sible from outside the panel 1 .
  • the panel lightable from the rear 1 comprises a support and containment frame 20 , which extends with a rear portion 21 behind said screen 10 and with a perimeter portion 22 perimetrically to said screen .
  • the screen 10 is mechanically connected to the frame 20 at the perimeter portion 22 of the frame .
  • the frame 20 may have an open box shape on one side where the screen 10 is positioned .
  • the support and containment frame 20 may define — in combination with the screen 10 — a closed chamber housing the electrical components of the panel lightable from the rear 1 .
  • the panel lightable from the rear 1 may be sel f-supporting .
  • the support and containment frame 20 is structured to also comprise a base for standing on the ground; for example , the panel 1 may be configured as a totem or a wall .
  • the panel lightable from the rear 1 may not be sel f-supporting .
  • the support and containment frame 20 is intended to be anchored to a wall , ceiling, or other structure .
  • the panel lightable from the rear 1 further comprises a plurality of light sources 31 and 32 adapted to directly or indirectly illuminate the aforesaid second face 12 of the screen, i . e . , the face of the screen that is not visible .
  • the light emitted by the light sources 31 , 32 once it reaches the second face 12 of the screen 10 , passes through the thickness of the panel that forms the screen to exit with a di f fuse transmission phenomenon at the first face 11 of the screen 10 .
  • the aforesaid light sources may be distributed on the perimeter portion 22 of said frame 20 , according to an EDGE- LIT-type configuration .
  • the panel 1 also comprises a light propagator 40 that extends on said second face 12 of the screen to guide light from said light sources 31 to said second face 12 .
  • the perimeter portion 22 of said frame 20 therefore also acts as a support base for the light sources 31 .
  • the light propagator 40 is substantially adherent to said second face 12 of the screen . In other words , there is substantially no empty space between the second face 12 of the screen 10 and the light propagator 40 .
  • a light propagator (or light guide ) is known per se to a person skilled in the art and will therefore not be described in greater detail .
  • the aforesaid light sources 32 may be distributed on the rear portion 21 of said frame 20 , according to a BACK-LIT-type configuration, directly facing said second face 12 of the screen 20 to illuminate it directly .
  • the rear portion 21 of said frame 20 therefore also acts as a support base for the light sources 32 .
  • a gap 23 is defined between the second face 12 of the screen and the rear portion 21 of the frame for the propagation of light from the light sources 32 to the second face 12 of the screen 10 .
  • the light sources 31 and 32 are composed of LEDs .
  • the panel lightable from the rear 1 comprises one or more column-shaped connectors 50 which connect said screen 10 — directly or indirectly — to the rear portion 21 of the support frame 20 according to directions incident to the second face 12 of the screen 10 .
  • Said one or more connectors 50 cross the light propagator 40 ( in the case of an edge-lit configuration) at holes made on said light propagator itsel f or said gap 23 ( in the case of a back-lit configuration) .
  • Each of the aforesaid one or more connectors 50 implements a mechanical constraint for the screen 10 that is added to the perimeter constraint of fered to said screen by the perimeter portion 22 of the frame 20 .
  • each connector 50 t by virtue of being arranged in a direction incident to the second face 12 of the screen 10 — opposes the bending of the screen 10 with respect to a plane parallel to the two faces 11 and 12 of the panel that forms it .
  • the connectors 50 thus allow the screen 10 to be sti f fened .
  • the reduction in thickness may be considered proportional to the reduction in the distance between the mechanical constraints and in particular the connectors 50 .
  • the thickness S of the screen may be halved, without any increase in bending deformability .
  • the panel lightable from the rear 1 according to the invention may therefore be made with a screen of large surface dimensions while maintaining adequate mechanical strength without the screen necessarily having to have increased thicknesses .
  • Such positive ef fect occurs regardless of the arrangement of the light sources 31 , 32 with respect to the screen, i . e . , it does not depend on whether the configuration is back-lit or edge-lit .
  • the thickness S of the screen is not important only in relation to the maximum output angle a of the light because this thickness S must also be evaluated in relation to what happens to the intensity of the light at increasing distances from the source according to the well-known law of the inverse of the square of the distance .
  • the thickness S is part of the distance separating the light source from the first face 11 , and the decrease in its value should be squared in the calculation of luminous intensity .
  • the panel lightable from the rear 1 according to the invention may therefore of fer a higher luminous ef ficacy exiting the screen ( i . e . , at the first face 11 ) thanks to the reduction in thickness S .
  • the cross-section of said one or more connectors 50 at the connection end to the second face 12 of the screen 10 is a fraction of the total area of the second face 12 of the screen 10 . Thanks to this , the adhesion areas of the connectors to the screen may be minimal . It follows that in the presence of thermal stresses , final lengthenings/ shortenings will develop at the connections between the connectors and the screen that are compatible with the elastic moduli of the di f ferent materials that form the screen and the connectors . This reduces the mechanical stresses induced by the di f ferent thermal expansion between the screen and connectors . Such coupling compatibility is improved in the case where the screen and connectors are coupled through an elastic binder .
  • the screen that may be lighted from the rear 10 is defined by a panel of a predefined material that is capable of transmitting the light crossing it in a di f fuse manner thanks to its physical features and/or a reduction in its thickness .
  • Fig . 7 schematically shows the phenomenon of a di f fuse transmission of light by a material through which the light pas ses . Due to the di f fuse transmission, the light that exits the material after passing through it is decomposed into a plurality of directions , and this means , at the same time , the decomposition also of any small light peak and/or depression caused by the presence of a connector and/or the hole made on the light guide ; decomposing a light peak or depres sion signi fies masking it . [0083] Such a phenomenon thus makes it possible to attenuate/mask in an extremely signi ficant way any light interference caused by the presence of the connectors in the light path .
  • the connectors 50 are made of material transparent to light , by seeking to use materials with close refractive indices and glues with an indicated refractive index .
  • the connectors 50 may be composed of nails/ screws made of a material such as glass , methacrylate , transparent resin, opaline resin .
  • the connectors may, however, also be made of opaque material , since the attenuation of any light interference obtained through the di f fuse transmission is so high that even the presence of an opaque body (having a section equal to a very small fraction of the total area of the screen ) would give rise to substantially negligible light shielding ef fects .
  • the connectors 50 may consist of metal nails/ screws .
  • said one or more connectors 50 may connect directly to said rear portion 21 of said frame 10 by crossing the light propagator 40 at holes or by crossing the gap 23 .
  • the panel lightable from the rear 1 may comprise one or more first sti f fening elements of the frame 210 that are arranged inside said frame 10 between said rear portion 21 of the frame 20 and said light propagator 40 .
  • said one or more connectors 50 after crossing the light propagator 40 , may connect to said one or more first sti f fening elements 210 which are integral with said rear portion 21 of the frame .
  • the screen 10 is indirectly connected to the rear portion 21 of the frame 20 by means of the connectors 50 through said one or more first sti f fening elements 210 .
  • the panel lightable from the rear 1 may comprise one or more second sti f fening elements of the frame 220 which are arranged outside said frame 20 integral with the rear portion 21 of said frame 20 .
  • said one or more connectors 50 after crossing the light propagator 40 or the gap 23 , may connect to said one or more second sti f fening elements 220 by crossing said rear portion 21 of the frame .
  • the screen 10 is indirectly connected to the rear portion 21 of the screen 10 through of the connectors 50 by means of said one or more second sti f fening elements 220 .
  • said one or more connectors 50 cross the rear portion 21 of said frame to connect to a possible support structure 100 outside the panel lightable from the rear 1 .
  • the rear portion 21 of the frame 20 is connected to this support structure 100 outside the panel lightable from the rear 1 .
  • the screen 10 is indirectly connected to the rear portion
  • a plurality of first grooves 13 may be obtained according to a predefined design that act as optical channels to make the screen 10 locally translucent .
  • the grooves 13 may have a depth less than the thickness of the panel or cross the entire thickness of the panel .
  • Fig . 3C shows from the front the first face 11 of the screen 10 , wherein examples of translucencies obtainable from the passage of light in the underlying grooves 13 are schematically represented with l ines 16 .
  • said first grooves 13 may be filled at least partially with a transparent binding material 14 which has the function of giving mechanical strength to the panel by compensating for the removal of material in these grooves 13 without impeding the passage of light .
  • said transparent binding material 14 may at least partially cover the second face 12 of the screen outside said first grooves 13 .
  • Said one or more connectors 50 may be anchored to said screen 10 by means of said transparent binding material 14 .
  • said one or more connectors 50 may be anchored to said screen 10 by means of said transparent binding material 14 at said first grooves 13 .
  • said one or more connectors 50 may be anchored to said screen 10 by means of said transparent binding material 14 outside said first grooves 13 .
  • said one or more connectors 50 may be anchored to said screen 10 at second grooves 15 which are obtained on said second face 12 of the screen 1 with a depth less than that of said first grooves 13 so as not to locally create translucency and act as anchoring seats for the connectors 50 .
  • said one or more connectors 50 may be anchored to said screen 10 at the top surface of said second face 12 of the screen 10 , for example by screwing and/or gluing in areas without prior mi lling .
  • Said one or more connectors 50 may be composed of cylindrical bodies having a constant crosssection, as shown in Fig. 19a.
  • Said one or more connectors 50 may have an axially differentiated cross-section.
  • they may have a conical shape, as shown in Fig. 19b, or they may have an enlarged head (nail-like) or they may have an enlarged intermediate portion 53 (as shown in Fig. 20) .
  • the axial portion of the connectors 50 that extends from the light propagator 40 to the rear portion 21 of the support frame 20 may have a larger cross-section than the axial portion that extends through the light propagator 40 to the screen.
  • each connector 50 to the rear portion 22 of the frame or to other support/stif f ening structures may be made in any way suitable for the purpose, i.e., to mechanically constrain the screen to another structure that is rigid enough to ensure any bending of the screen described above.
  • Various types of coupling may be used for this purpose which are not described in detail as they are known to a person skilled in the art .
  • the connection may be made with a guillotine method . More speci fically, the connector 50 has a groove 51 in a certain axial position .
  • the end of the connector 50 opposite to that intended to be connected to the screen 10 is inserted within a slot obtained, for example , on the rear portion 21 of the frame 20 .
  • the slot 52 in turn has : - a first portion 52 ' enlarged for the free insertion of the connector 50 ; - a second narrowed portion 52" adapted to engage with its edges in the groove 51 of the connector .
  • This provides a stable anchor between the connector and the support structure without the use of adhesives , which may be used to press the components of the panel 1 together .
  • all the connector passage holes or housing seats are slightly oversi zed with respect to the connector cross-section so as to compensate for any thermal expans ion of the components .
  • the panel forming the screen 10 may be provided with a plurality of notches (in particular forming a lattice which may extend to the entire second face 12 of the screen) ; these notches have a depth less than the thickness S of the panel and have the function of superficially splitting the panel so as to reduce the intensity of deformations of anisotropic materials due to thermal stress .
  • the panel lightable from the rear 1 according to the invention may be made with a screen having large surface dimensions and at the same time may maintain adequate mechanical strength without necessarily having to have increased thicknesses of the screen .
  • the panel lightable from the rear 1 according to the invention allows for the correction/masking of any light interference or defects in the distribution of the light .
  • the panel lightable from the rear 1 according to the invention with the same mechanical bending strength and luminous power applied to the source — may of fer a superior luminous ef ficacy exiting the screen .
  • the panel lightable from the rear 1 according to the invention is simple to manufacture .
  • being able to illuminate the same surface with a more than signi ficant decrease in the luminous power of the source leads to a decrease in costs , but above all to a containment of heat development.
  • the latter is perhaps the most important indicator of the durability of the LED and of a screen, especially when the same is made of materials such as wood or marble that are extremely sensitive to thermo-hygrometric changes, and in general also of the general safety of the electrical appliance.
  • the panel lightable from the rear 1 according to the invention may use a screen that is less subject to deformation due to thermal stress.
  • the subject-matter of the present invention is a panel lightable from the rear (1) , comprising:
  • a rear-lightable screen defined by a plate of a predefined material, having a first face (11) , intended to be visible, and a second face (12) , opposite to the first, said predefined material transmitting the light crossing it in a diffuse manner thanks to its physical features and/or a reduction in its thickness;
  • a support and containment frame (20) extending with a rear portion (21) behind said screen and with a perimeter portion (22) perimetrically to said screen
  • Said light sources are:
  • said panel (1) also comprising a light propagator (40) extending over said second face (12) of the screen to guide the light from said light sources to said second face (12) , said light propagator (40) being substantially adherent to said second face (12) of the screen;
  • the panel lightable from the rear (1) comprises one or more column-shaped connectors (50) that connect said screen (10) — directly or indirectly — to the rear portion (21) of the support frame (20) according to directions incident to the second face of the screen. Said one or more connectors cross the light propagator (40) or said gap (23) .
  • said one or more connectors (50) may connect directly to said rear portion (21) of said frame.
  • the panel lightable from the rear (1) may comprise one or more first stiffening elements of the frame (210) that are arranged inside said frame (20) between said rear portion (21) of the frame (20) and said light propagator (40) ; said one or more connectors (50) are connected to said one or more first stiffening elements (210) integral with said rear portion (21) .
  • the panel lightable from the rear (1) may comprise one or more second stiffening elements of the frame (220) which are arranged outside said frame (20) , integral with the rear portion (21) of said frame (20) .
  • Said one or more connectors (50) are connected to said one or more second stiffening elements (220) crossing said rear portion (21) of the frame.
  • said one or more connectors (50) cross said rear portion (21) of said frame to connect to a possible support structure outside the panel lightable from the rear (1) .
  • the cross-section of said one or more connectors (50) at the connection end to the second face (12) of the screen (10) is a fraction of the total area of the second face (12) of the screen (10) .
  • said one or more connectors (50) are made of transparent material.
  • a plurality of first grooves (13) may be obtained according to a predefined design that acts as optical channels to make the screen (10) locally translucent.
  • said first grooves (13) may be at least partially filled with a transparent binding material ( 14 ) .
  • said transparent binding material (14) at least partially covers the second face (12) of the screen outside said first grooves
  • said one or more connectors (50) are anchored to said screen (10) by means of said transparent binding material (14) .
  • said one or more connectors (50) may be anchored to said screen (10) by means of said transparent binding material (14) at said first grooves ( 13 ) .
  • said one or more connectors (50) may be anchored to said screen (10) by means of said transparent binding material (14) outside said first grooves ( 13 ) .
  • said one or more connectors (50) may be anchored to said screen (10) at second grooves (15) which are obtained on said second face with a depth less than that of said first grooves
  • said one or more connectors (50) may be anchored to said screen (10) at the top surface of said second face, in particular by screwing or gluing in areas without prior milling.
  • said one or more connectors (50) may have an axially differentiated crosssection .
  • the axial portion of the connectors ( 50 ) extending from the light propagator ( 40 ) to the rear portion ( 21 ) of the support frame has a larger cross-section than the axial portion extending through the light propagator ( 40 ) to the screen .
  • the holes made in the light propagator through which said one or more connectors pass may have lapped edges .
  • Lapping reduces edge irregularities and makes the angle of light exiting the hole edges smoother .
  • the holes made in the light propagator through which said one or more connectors pass may have painted edges .
  • the paint makes the exit of light from the edges of the hole smoother .
  • the space between the connector and the edges of the respective hole may be filled with transparent binding material that has a refractive index equal to or close to that of the light propagator or that has di f fusive features in order to decrease any light inhomogeneity on the second face ( 12 ) of the screen .
  • Said transparent binder also keeps the connector centered on average with respect to the light guide .
  • the light propagator 40 is substantially adherent to said second face 12 of the screen . In other words , there is substantially no empty space between the second face 12 of the screen 10 and the light propagator 40 .
  • the light propagator 40 is spaced from the second face 12 of the screen by means of spacer elements .
  • the spacing of the light propagator ( 40 ) from the second face ( 12 ) of the screen ( 10 ) is provided in the case wherein the light inhomogeneity caused by one or more holes made on the light propagator arriving on the second face 12 of the screen 10 is particularly intense and/or in the case wherein there is an increased need for heat dissipation .
  • the information conveyed by the light is more decomposed i f the light guide , which is the site of any light inhomogeneity, is moved away from the di f fusion screen 10 .
  • said one or more connectors may carry within them further connection elements of the types :
  • el ectrical such as power cables , PC cables ; and/ or
  • optical such as optical fibers .
  • the aforesaid additional connection elements may remain confined within the respective connector without reaching the screen, or they may pass over the respective connector and reach the screen or even go beyond it .
  • connection elements may exit from the first face 11 of the screen to allow further functions .
  • power cables for additional lighting bodies , PC charging cables , presence sensors may come out at any point of the screen .
  • the connectors 50 may exit from the screen at the first face 11 so as to act as mechanical connection elements .
  • the connectors may be composed of metallic fastening elements such as screws , threaded bodies or nails , functional for anchoring, for example , brackets , cameras , anti-the ft elements , and in general arrangements that otherwise would be relegated to the perimeter of the panel .
  • the aforesaid first grooves 13 which act as optical channels to make the screen 10 locally translucent may be partly obscured by the use of darkening binding material and/or by applying a darkening film in adherence to the second face 12 of the screen .
  • This arrangement allows even very deep cuts to be made , at a depth close to transparency, thus making it possible to also curve the screen, without the passage of light through the grooves .
  • the grooves otherwise permeable to light, are in fact masked with a binder opaque to light or with masks selectively opaque to light placed on the second face 12 of the screen or on the bottom of the grooves of the face 12.
  • Transparent binder with diffusive properties may be used.
  • the use of a transparent binder with diffusive properties within the groove helps to further correct light inhomogeneities arriving on the second face 12 of the screen 10.
  • said one or more connectors are connected to the screen by means of transparent binding material which is physically interposed between the connector head and the screen.
  • the head of the connectors is spaced apart from the screen.
  • the screen 10 may be reinforced on the second face 12 by applying a layer of transparent binder with the addition of glass fiber.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

La présente invention concerne un panneau pouvant être éclairé par l'arrière (1), comprenant : un écran (10) qui peut être éclairé par l'arrière défini par une plaque d'un matériau prédéfini, présentant une première face (11), destinée à être visible, et une seconde face (12), opposée à la première, ledit matériau prédéfini transmettant la lumière la traversant de manière diffuse grâce à ses caractéristiques physiques et/ou une réduction de son épaisseur ; un cadre de support et de confinement (20), s'étendant avec une partie arrière (21) derrière ledit écran et avec une partie périphérique (22) périmétralement audit écran - une pluralité de sources de lumière (31) conçues pour éclairer directement ou indirectement ladite seconde face (12) de l'écran. Les sources de lumière sont réparties sur la partie périmétrique (22) dudit cadre (20) ; ledit panneau (1) comprend également un propagateur de lumière (40) s'étendant sur ladite seconde face (12) de l'écran pour guider la lumière desdites sources de lumière vers ladite seconde face (12), ledit propagateur de lumière (40) étant sensiblement adhérent à ladite seconde face (12) de l'écran. Le panneau (1) comprend un ou plusieurs connecteurs en forme de colonne (50) qui relient ledit écran (10) directement ou indirectement à la partie arrière (21) du cadre de support (20) selon des directions incidentes sur la seconde face de l'écran, ledit ou lesdits connecteurs croisant le propagateur de lumière (40).
PCT/IB2024/055704 2023-06-14 2024-06-11 Panneau pouvant être éclairé par l'arrière Ceased WO2024256963A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000012216 2023-06-14
IT202300012216 2023-06-14

Publications (1)

Publication Number Publication Date
WO2024256963A1 true WO2024256963A1 (fr) 2024-12-19

Family

ID=88098113

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/055704 Ceased WO2024256963A1 (fr) 2023-06-14 2024-06-11 Panneau pouvant être éclairé par l'arrière

Country Status (1)

Country Link
WO (1) WO2024256963A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2403235A (en) * 2002-07-20 2004-12-29 Laurence Keith Kovacs Adjustable mounting arrangement for light or speaker located in ceiling void
KR101194630B1 (ko) * 2011-09-15 2012-10-29 김형태 액자
WO2012158894A2 (fr) * 2011-05-17 2012-11-22 Pixi Lighting Llc Dispositif d'éclairage à panneau plat et circuit de commande
CN104421774A (zh) * 2013-09-09 2015-03-18 深圳市海洋王照明工程有限公司 嵌入式led面板灯及其安装结构
CN106764729A (zh) * 2017-03-15 2017-05-31 佛山市德珂照明科技有限公司 角度可调的埋地灯
FR3102231A1 (fr) * 2019-10-18 2021-04-23 Gerflor Panneau lumineux pour la réalisation d’un revêtement d’un mur d’une pièce
CN115662318A (zh) * 2022-11-16 2023-01-31 张焱秋 一种贴墙装饰灯

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2403235A (en) * 2002-07-20 2004-12-29 Laurence Keith Kovacs Adjustable mounting arrangement for light or speaker located in ceiling void
WO2012158894A2 (fr) * 2011-05-17 2012-11-22 Pixi Lighting Llc Dispositif d'éclairage à panneau plat et circuit de commande
KR101194630B1 (ko) * 2011-09-15 2012-10-29 김형태 액자
CN104421774A (zh) * 2013-09-09 2015-03-18 深圳市海洋王照明工程有限公司 嵌入式led面板灯及其安装结构
CN106764729A (zh) * 2017-03-15 2017-05-31 佛山市德珂照明科技有限公司 角度可调的埋地灯
FR3102231A1 (fr) * 2019-10-18 2021-04-23 Gerflor Panneau lumineux pour la réalisation d’un revêtement d’un mur d’une pièce
CN115662318A (zh) * 2022-11-16 2023-01-31 张焱秋 一种贴墙装饰灯

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