Technical Field
[0001] The present description relates to lighting devices.
[0002] One or more embodiments may refer to lighting devices employing electrically powered
light radiation sources such as solid-state sources, e.g. LED sources.
Technological Background
[0003] Various lighting applications may envisage the use of devices including LED modules,
which may exhibit a protection against the penetration of external agents, e.g. an
IP protection degree.
[0004] Such devices may cause, at least in some conditions, problems regarding fixation,
e.g. because of the little available space (e.g. in case of a hand rail application)
or regarding the distribution of the light radiation emitted by the module itself
(e.g. a batwing distribution).
[0005] One approach to solving said critical aspects may involve the use of a bi-adhesive
tape. This solution, however, may cause difficulties if a module must be removed and
optionally re-installed without suffering damages.
[0006] Although being characterized by the advantage of an easy implementation, the bi-adhesive
mounting solution may be unsatisfactory as regards the retention force, also as a
function of the material of the mounting surface.
[0007] In order to fix an e.g. LED lighting module onto a surface, a glue such as a silicone
glue may be used. Also in this case, a critical aspect may concern the optional removal
of the module without causing damages.
[0008] Gluing may also cause problems to the end user, due for instance to the risk of soiling
the module during mounting or to the fact that the glue may not perform an instantaneous
fixing action, and therefore may require the user to hold the module in position until
the glue actually carries out its retention function.
[0009] Another possible drawback of glues may be due to a limited service life and/or to
the possible change in colour.
[0010] Another approach involves the use of fixation clips, which are available in various
shapes and materials and may be used to implement different fixation solutions, thanks
to the differences in retention force and/or fixation method.
[0011] Such clips may exhibit the drawback of masking, at least partially, the light emitting
surface, and consequently they may modify the emission distribution of the light beam:
for example, the may affect the distribution of the light radiation, therefore originating
dark spots along the module.
[0012] Said drawback, i.e. the negative impact on the uniformity of light emission lengthwise
of the module, may also affect various solutions described in the foregoing.
[0013] Still another solution may involve mounting tracks, e.g. piercing tracks, which are
adapted to ensure a good result as regards uniformity, but may pose the risk of causing
damages in case of a removal of the module which, once mounted on a track, may have
been pierced or otherwise penetrated by various fixation elements.
Object and Summary
[0014] One or more embodiments aim at overcoming the previously outlined drawbacks.
[0015] According to one or more embodiments, said object may be achieved thanks to a lighting
system having the features set forth in the claims that follow.
[0016] One or more embodiments may also refer to components of said system, as well as to
a corresponding kit and method.
[0017] The claims are an integral part of the technical teaching provided herein with reference
to embodiments.
[0018] One or more embodiments may offer one or more of the following advantages:
- absence of masking effects on the emitted light radiation; this is a critical point
e.g. if the lighting device has a wide light radiation emission pattern. One or more
embodiments enable the device to exhibit, in the final mounting condition, the desired
radiation pattern without any deviation due for instance to mounting clips;
- possibility of implementing mounting solutions which are invisible from the outside,
optionally by fixing the device in such a way as to mask the fixation structure: this
may be a key aspect as regards the aesthetic appearance of the application;
- the retention force may remain effective also over long time periods, without alterations,
even in the case when the mounting surface and/or the environmental conditions may
forbid or damage an adhesive solution or may exert a deteriorating effect, possibly
jeopardizing the fixation conditions.
Brief Description of the Figures
[0019] One or more embodiments will now be described, by way of non-limiting example only,
with reference to the annexed Figures, wherein:
- Figure 1 is a cross-section view of embodiments,
- Figure 2 exemplifies further possible features of embodiments,
- Figure 3 is a perspective view of one of the elements visible in Figure 2,
- Figures 4 to 6 exemplify possible implementing modifications of embodiments,
- Figures 7 to 12, on one hand, and Figures 13 to 18, on the other hand, show various
possible implementations of embodiments.
[0020] It will be appreciated that, for simplicity and clarity of illustration, the various
Figures may not be drawn to the same scale.
Detailed Description
[0021] In the following description, various specific details are given to provide a thorough
understanding of exemplary embodiments according to the present specification. The
embodiments may be practiced without one or several specific details, or with other
methods, components, materials, etc. In other instances, well-known structures, materials
or operations are not shown or described in detail in order to avoid obscuring the
various aspects of the embodiments.
[0022] Reference throughout this specification to "one embodiment" or "an embodiment" means
that a particular feature, structure, characteristic described in connection with
the embodiment is included in at least one embodiment. Thus, the possible appearances
of the phrases "in one embodiment" or "in an embodiment" in various places throughout
this specification are not necessarily all referring exactly to the same embodiment.
Furthermore, particular features, structures, or characteristics may be combined in
any suitable manner in one or more embodiments.
[0023] The headings provided herein are for convenience only, and therefore do not interpret
the extent of protection or scope of the embodiments.
[0024] In the Figures, reference 100 generally denotes a lighting device adapted to include
a light radiation generator 120 having a structure known in itself. Some possible
exemplary implementations of said structure are discussed in the following with reference
to Figures 7ff.
[0025] In one or more embodiments, it is possible to apply, onto generator 120, a profiled
housing 122 of a light-permeable material (e.g. a transparent silicone material) adapted
to allow for the propagation of the light radiation emitted by generator 120 outwards
from device 100, e.g. at a rounded front surface of housing 122.
[0026] In one or more embodiments, housing 122 may perform a protection action against the
penetration of external agents into device 100, e.g. with an IP degree protection.
[0027] Generally speaking (apart from what will be specified in further detail in the following),
devices such as the device (or module) 100 exemplified in the foregoing are to be
deemed as known in themselves, which makes it unnecessary to provide a more detailed
description herein. This also applies to the possibility of implementing such a device
as an element of indefinite length (shown in cross section in the Figures), optionally
flexible and/or adapted to be cut to length according to the application and usage
needs.
[0028] One or more embodiments may deal with the problem of enabling mounting said device
onto a mounting structure S.
[0029] One or more embodiments may favour mounting device 100 onto a wide range of mounting
structures S. Said structures may include for instance a wall (e.g. a ceiling), an
architectural element (e.g. a hand rail), a furnishing element of any nature, both
in buildings and in moving structures such as vehicles and the like: this list is
of course merely exemplary, and does not limit the embodiments.
[0030] In one or more embodiments, the mounting of device 100 may take place via a fixation
element 10.
[0031] In one or more embodiments, element 10 may include a sort of profiled track adapted
to be coupled to structure S, and having at least one formation for coupling with
device 100.
[0032] In one or more embodiments as exemplified in Figures 1 to 6, element 10 may include
a channel-shaped track, including a central or core wall 10a and side walls 10a extending
sidewise of central wall 10a.
[0033] In one or more embodiments, each side wall 10b is adapted to form a rib-like protrusion,
which may be inserted in a corresponding longitudinal groove 100b provided in device
100.
[0034] In one or more embodiments, the groove (s) 100b (which may be provided in the same
number as the rib-like protrusions 10b in element 10) may be located at the back portion
(lower portion in Figures 1 and 2) of the housing of device 100.
[0035] In one or more embodiments, the groove(s) or slot(s) 100b may be provided in a part
of device 100 (e.g. the housing or profile 122) adapted to include a compliant material
(e.g. a silicone material).
[0036] In one or more embodiments, the rib(s) 10b may therefore penetrate the groove(s)
100b and may be retained therein, thanks to the deformability of the walls of the
groove(s) 100b.
[0037] In one or more embodiments, the rib(s) 10b may include sculpturing 10c adapted to
originate a firmer retention, e.g. thanks to a locking mechanism.
[0038] For example Figures 1, 2 and 4 exemplify a tooth-like sculpturing 10c, e.g. with
a sawtooth profile adapted to implement a hooking coupling with the walls of the groove(s)
100b.
[0039] In one or more embodiments, the sculpturing features 10c may be present in different
numbers and with different profiles, as shown - by way of example only - in Figure
5, which shows sculpturing features 10c arranged in pairs on each side wall 10d, and
having a square/rectangular cross section, or in Figure 6, showing sculpturing features
10c which extend (as a single sculpturing feature on each side wall 10b) with a rounded,
e.g. lobe-shaped, cross-section profile.
[0040] It will be appreciated, moreover, that in one or more embodiments:
- sculpturing 10c may be provided not on the outer surface of side walls 10b, but rather
on the inner surface thereof, or both on the outer and on the inner surface,
- the coupling arrangement shown herein between device 100 and element 10 may be reversed,
with device 100 having one or more protruding formations adapted to penetrate one
or more longitudinal grooves of element 10.
[0041] One or more embodiments implementing the latter solution are exemplified in Figures
7ff.
[0042] Figures 7 to 11 refer to a device 100 wherein the protection against the penetration
of external agents is achieved through the use of a channel-shaped housing, while
Figures 13 to 17 refer to an equally protected device 100 wherein the protection may
be achieved during the forming (moulding) step of device 100.
[0043] Moreover, said Figures exemplify possible implementation details of the light radiation
generator which is generally denoted as 120 in Figure 1.
[0044] For example, in one or more embodiments as exemplified in Figures 7ff, generator
120 may include electrically powered light radiation sources, such as one or more
LED sources. References 1 and 2 appearing in Figures 7ff respectively denote the LED
source (e.g. emitting in the blue range, with phosphor conversion into visible light)
and the associated package.
[0045] In the same Figures, reference 7 denotes a substrate (substantially similar to a
Printed Circuit Board, PCB) for mounting source(s) 1, 2.
[0046] Reference 8 denotes an insert (or spacer), optionally of a thermally conductive material,
which in one or more embodiments may be interposed between substrate 7 and the bottom
wall of a channel-shaped housing 9.
[0047] In one or more embodiments, as exemplified in Figures 7 to 11, housing 9 is adapted
to host the substrate 7, whereon source(s) 1, 2 are arranged, the channel-like shape
of housing 9 being adapted to be filled with a potting mass.
[0048] In one or more embodiments, the potting mass may include a material 5, e.g. a white
or reflective, generally light-impermeable material, adapted e.g. to mask from observation
from the outside of device 100 electrical/electronic components and devices which
may be mounted on the front surface of substrate 7, as well as a further light-permeable
material 3 (e.g. a transparent or diffusive material) which allows the light radiation
produced by source 1 to propagate outwards from device 100.
[0049] In one or more embodiments substrate 7, insert 8 (if present), housing 9 and masses
5 and 3 are adapted to include a flexible material, so that device 100 is generally
flexible.
[0050] Figures 7 to 11 exemplify various implementation solutions for one or more ribs 91,
adapted to protrude from the central wall of housing 9 (in the direction away from
the front side of device 9, from which the light radiation is diffused), so as to
be inserted into one or more corresponding slots or grooves 101, 102 adapted to be
provided in the fixation element 10.
[0051] For example, in one or more embodiments, the presence may be envisaged of one or
more ribs 91 having (transversally of the extension direction of device 100) a width
increasing in the distal direction, away from the body of device 100, so as to originate
a dove-tail joint with one or more corresponding cavities 101, 102 provided in the
fixation element 10.
[0052] Specifically, Figure 11 (and, in a complementary fashion, Figure 12) exemplify the
possibility, in one or more embodiments, of envisaging the presence of a plurality
of ribs 91 of this kind, each being adapted to engage a corresponding slot/groove
101, 102 of the fixation element 10.
[0053] Figures 7 to 10 exemplify various features which may be present in one (or each)
of said ribs 91.
[0054] For example:
- Figure 8 exemplifies the possibility for the distal edges of rib 91 to have edge portions
92 protruding from the rounded profile,
- Figure 9 exemplifies the possible presence of a central carving 93, adapted to favour
the transversal shrinking of rib 91,
- Figure 10 exemplifies the possible presence of chamferings or bevels 94 at the distal
edges of rib 91 and, at the same time, the possible presence of edge portions 92 which
are recessed into, and not protruding from, the rounded profile.
[0055] Similar or complementary features may also be present in the fixation element, as
exemplified by the rounded/chamfered edges denoted as 104 in Figure 12 and in Figure
18.
[0056] In this respect it will be appreciated that, in one or more embodiments, the implementation
features or details exemplified in each of the Figures annexed to the present description
are adapted to be applied - individually or in mutual combination - to embodiments
exemplified in any of the other Figures.
[0057] This aspect is shown for example in Figures 13 to 18, wherein one or more features
of rib(s) 91 exemplified with reference to Figures 7 to 12 are applied to a device
100 having a protection obtained by moulding (Moulded Flex Protect), wherein substrate
7 hosting the light radiation source(s) 1, 2 is sealed against the penetration of
external agents, by being moulded between:
- a first housing portion 6, which faces the back surface of substrate 7 accommodated
therein (from which rib 91 may extend), and
- a second portion 4, which completes the sealing action against the penetration of
external agents.
[0058] In one or more embodiments, the first portion 6 may include a white or translucent,
e.g. light-impermeable, material, while portion 4 may include transparent or diffusive
material, i.e. a light-permeable material, enabling the propagation towards the outside
of device 100 of the light radiation generated by source(s) 1, 2.
[0059] One or more embodiments may therefore envisage at least one protruding formation
(rib) in one of device 100 and fixation element 10, and at least one corresponding
slot or groove e.g. in the other element.
[0060] For example, in one or more embodiments as exemplified in Figures 1 and 2, the at
least one protruding formation (rib) is provided (see e.g. 10b) in the fixation element
10, with one or more corresponding grooves (see e.g. 100b) provided in device 100.
[0061] Once again by way of example, in one or more embodiments as exemplified in Figures
7ff the at least one protruding formation (rib) is provided (see e.g. 91) in device
100, with one or more corresponding grooves (see e.g. 101, 102) provided in the fixation
element 10.
[0062] In one or more embodiments as exemplified in Figures 7ff, the coupling between such
complementary portions (protruding formation(s) and groove(s)) may be implemented
by a dove-tail joint.
[0063] In one or more embodiments it is possible to take advantage of the flexibility of
the materials denoted as 3, 5, 9 as well as 4 and 6, both for the separation from
a mould (see e.g. the embodiments exemplified in Figures 13 to 17) and for the mounting
(and removal), which may optionally be performed repeatedly, of device 100 to and
from the fixation element 10.
[0064] In one or more embodiments, the presence of rounded edges (as exemplified in Figure
6 or as denoted as 92 in Figures such as Figure 9 or Figure 15) may simplify such
mounting and removing operations.
[0065] The possible presence of a central slot or groove, such as the one denoted as 93
in Figures such as Figures 9 and 13, may further simplify said mounting operations,
by favouring the transversal shrinking of rib 91.
[0066] The mounting/removal operation may also be simplified by the presence of chamferings
or bevels, such as the ones denoted as 94 in Figure 10 or in Figure 16.
[0067] One or more embodiments may enable a simple mounting of device 100 onto element 10
by a simple snap-on operation, optionally with the application of low side forces.
[0068] The removal operation of device 100 from fixation element 10 may take place, in one
or more embodiments, simply through a pulling action exerted onto device 100 in a
direction away from fixation element 10.
[0069] One or more embodiments may enable an accurate positioning of fixation element 10,
which may be advantageous for signage applications, the possibility being given for
example of initially defining the position of fixation element 10 with accuracy, without
involving the lighting device 100 in the operation.
[0070] In one or more embodiments, the complementary formations (rib(s) 10b, 91 and corresponding
cavities 100b, 101, 102) may be implemented in different ways, for example during
the manufacturing process of device 100 (e.g. during the extrusion of housing 3, 4,
6, 9), or optionally with a cutting process, e.g. laser cutting.
[0071] In one or more embodiments, the sizes and shapes of said complementary formations
may depend on the forming process thereof, e.g. with different cutting methods; for
example, in the case of an extrusion process, the cavities may be larger than those
implemented via laser cutting.
[0072] In one or more embodiments, the retention force which may be achieved thanks to the
coupling of said complementary features may be proportional to the size thereof, e.g.
to the size of the cavity.
[0073] For example, a small-sized cavity may exert a higher retention force than a large-sized
cavity. On the other hand, the choice of a large-sized cavity may simplify the mounting
and installation process.
[0074] In one or more embodiments, the choice of a given shape of the complementary features
may depend e.g. on the desired properties as regards the force needed for installing
device 100 onto fixation element 10, and/or on the desired retention force. Generally
speaking, it may be assumed that, the higher the force needed during installation,
the higher the retention force achieved.
[0075] As regards the mounting procedure of fixation element 10, it may be stated that for
example a generally rigid element 10 (e.g. a track of a light metal material) may
be preferable for linear applications, the choice of a thermally conductive material
being also useful for cooling, i.e. for dissipating the heat produced by the light
radiation source(s) in operation.
[0076] The choice of a flexible element 10, which may again include a metal material, may
be useful in nonlinear applications, wherein a certain adaptability of device 100
to the mounting structure is sought after.
[0077] It will be appreciated, moreover, that one or more embodiments are adapted to be
employed in conjunction both with modules 100 of a certain length and with modules
having reduced length.
[0078] Once again it is to be noted that, in one or more embodiments, the implementation
features or details exemplified in each of the Figures annexed to the present specification
are adapted to be applied - individually or in mutual combination - to embodiments
exemplified in any other Figure.
[0079] One or more embodiments may be implemented as:
- a lighting system including device 100 and element 10;
- device 100 and element 10, as components of said system, which are optionally provided
separately and are subsequently assembled into the system;
- a corresponding kit including, e.g. in a single package, device 100 and element 10,
and
- a method of employing the system.
[0080] One or more embodiments may therefore concern a lighting system including:
- an elongated lighting device (e.g. 100) including a front light emission surface (e.g.
122; 3; 4) and a back surface opposite said front surface,
- a fixation element (e.g. 10) coupleable to a mounting structure (e.g. S),
wherein the lighting device and the fixation element include complementary formations
(e.g. 10b, 100b; 91, 101, 102) mutually engageable in a form-coupling relationship.
[0081] In one or more embodiments, the lighting device may carry the respective formations,
mutually engageable in a form-coupling relationship with the corresponding formations
of the fixation element, on the back surface, opposite the front light emission surface
(e.g. 122; 3, 4).
[0082] In one or more embodiments, the complementary formations may include:
- at least one rib-like protrusion in one of the lighting device and the fixation element,
and
- at least one groove in the other of the lighting device and the fixation element.
[0083] In one or more embodiments, said complementary formations may include a dove-tail
coupling.
[0084] In one or more embodiments, said complementary formations may include sculpturing
(e.g. 10c) on at least one (e.g. 10b) of said complementary formations.
[0085] In one or more embodiments, said sculpturing may include tooth-like formations.
[0086] In one or more embodiments, said complementary formations may include rounded and/or
chamfered edge regions (e.g. 10c; 92, 94).
[0087] In one or more embodiments, said complementary formations may include material (e.g.
the material of the housing 100b or of the rib(s) 91) and/or form features (e.g. 93)
facilitating deformation of the complementary formations during coupling, optionally
via elastic coupling.
[0088] In one or embodiments, said complementary formations may include a plurality of pairs
of mutually coupleable complementary formations.
[0089] In one or more embodiments, the lighting device may include a protected device including
an optionally flexible encapsulation (e.g. 122; 3, 5, 9; 4, 6).
[0090] In one or more embodiments, said lighting device may include at least one solid-state
light radiation source (e.g. 1, 2), preferably a LED source.
[0091] One or more embodiments may concern a lighting device configured (e.g. 100b; 91)
as a component for use in a lighting system according to one or more embodiments.
[0092] One or more embodiments may concern a fixation element for lighting devices, the
element being configured (e.g. 10b; 101, 102) as a component for use in a lighting
system according to one or more embodiments.
[0093] One or more embodiments may concern a kit for providing a lighting system according
to one or more embodiments, the kit including:
- a lighting device according to one or more embodiments, and
- a fixation element according to one or more embodiments.
[0094] In one or more embodiments, a method of providing a lighting device may include:
- providing an elongated lighting device including a front light emission surface and
a back surface opposite said front surface, and a fixation element coupleable to a
mounting structure,
- providing the lighting device and the fixation element with complementary formations
mutually engageable in a form-coupling relationship, and
- coupling the lighting device and the fixation element by bringing said complementary
formations into a form-coupling relationship.
[0095] One or more embodiments may include coupling the fixation element to a mounting structure,
preferably prior to coupling the lighting device and the fixation element.
[0096] Without prejudice to the basic principles, the implementation details and the embodiments
may vary, even appreciably, with respect to what has been described herein by way
of non-limiting example only, without departing from the extent of protection.
[0097] The extent of protection is determined by the annexed claims.
1. A lighting system, including:
- an elongated lighting device (100) including a front light emission surface (122;
3; 4) and a back surface opposite said front surface,
- a fixation element (10) coupleable to a mounting structure (S),
wherein the lighting device (100) and the fixation element (10) include complementary
formations (10b, 100b; 91, 101, 102) mutually engageable in a form-coupling relationship.
2. The lighting system of claim 1, wherein the complementary formations include:
- at least one rib-like protrusion (10b; 91) in one of the lighting device (100) and
the fixation element (10), and
- at least one groove (100b; 101, 102) in the other of in one of the lighting device
(100) and the fixation element (10).
3. The lighting system of claim 1 or claim 2, wherein said complementary formations (91,
101, 102) include a dove-tail coupling.
4. The lighting system of any of the previous claims, wherein said complementary formations
include sculpturing (10c) on at least one (10b) of said complementary formations.
5. The lighting system of claim 4, wherein said sculpturing (10c) includes tooth-like
formations.
6. The lighting system of any of the previous claims, wherein said complementary formations
include rounded and/or chamfered edge regions (10c; 92, 94).
7. The lighting system of any of the previous claims, wherein said complementary formations
include material (100b; 91) and/or form features (93) facilitating deformation of
the complementary formations during coupling, preferably via elastic coupling.
8. The lighting system of any of the previous claims, wherein the complementary formations
include a plurality of pairs (10b, 100b; 91, 101; 91, 102) of mutually engageable
complementary formations.
9. The lighting system of any of the previous claims, wherein the lighting device (100)
includes a protected device including a sealing, preferably flexible, encapsulation
(122; 3, 5, 9; 4, 6).
10. The lighting system of any of the previous claims, wherein said lighting device (100)
includes at least one solid-state light radiation source, preferably a LED source
(1, 2).
11. A lighting device (100), configured (100b; 91) as a component for use in a lighting
system according to any of claims 1 to 10.
12. A fixation element (10) for lighting devices (100), the element being configured (10b;
101, 102) as a component for use in a lighting system according to any of claims 1
to 10.
13. A kit for providing a lighting system according to any of claims 1 to 10, the kit
including:
- a lighting device (100) according to claim 11, and
- a fixation element (10) according to claim 12.
14. A method of providing a lighting device, wherein the includes:
- providing an elongated lighting device (100) including a front light emission surface
(122; 3, 4) and a back surface opposite said front surface, and a fixation element
(10) coupleable to a mounting structure (S),
- providing the lighting device (100) and the fixation element (10) with complementary
formations (10b, 100b; 91, 101, 102) mutually engageable in a form-coupling relationship,
and
- coupling the lighting device (100) and the fixation element (10) by bringing said
complementary formations (10b, 100b; 91, 101, 102) into a form-coupling relationship.
15. The method of claim 14, including coupling the fixation element (10) coupleable to
a mounting structure (S), preferably prior to coupling the lighting device (100) and
the fixation element (10).