EP2863113A1

EP2863113A1 - Luminaire

Info

Publication number: EP2863113A1
Application number: EP20140382409
Authority: EP
Inventors: Salvi Plaja Miro; Adrià Riqué Rebull; Francesc Jordana Casamitjana; Jorge Dapena Dominguez
Original assignee: Simon SA
Current assignee: Simon SA
Priority date: 2013-10-21
Filing date: 2014-10-21
Publication date: 2015-04-22
Also published as: MX2014012770A; CN104566278B; BR102014026288A2; MX338414B; CN104566278A; ES2435501B1; ES2435501A1

Abstract

Luminaire, of the type that integrates a group of lamps (3) each one of which has a reflector screen (4) at the bottom of which a source of light (5) is placed, characterised in that the group of lamps (3) of the luminaire (1) is divided into concentric rings (cr) wherein all the lamps (3) of each concentric ring (cr) have the same cut-off angle (a) and the cut-off angle (a0) of the lamps (3) of the most peripheral concentric ring (cr0) is less than the cut-off angle (a1,...,an) of the lamps (3) of the more inner concentric rings (cr1 ,...,crn). The cut-off angle (an) of the lamps (3) of each concentric ring (crn) is greater than or equal to the cut-off angle (an-1) of the immediately outer concentric ring (crn-1).

Description

Object of the invention

The invention relates to a new luminaire with multiple lamps, which presents a series of innovative characteristics and advantages, described in further detail below that represent a noteworthy novelty in its field of application
The object of the present invention relates specifically to a luminaire that incorporates a multiplicity of light emitting sources, such as for example LED lamps, incandescent lamps or lamps of any other type, with their respective reflectors (hereinafter, lamps) presenting the particularity of said light sources and/or said reflectors being specifically configured and disposed to optimise the degree of discomfort glare and thus obtain an enhanced luminous efficacy of the assembly.

Field of application of the invention

The field of application of the present invention falls within the framework of the industrial sector dedicated to the manufacture of luminaires, focusing particularly on the context of luminaires which incorporate multiple lamps.

Background of the invention

As it is known, to prevent discomfort glare, luminaires with a reflector screen or grille are designed in such a way as to limit the radiation in the different directions of vision. A way of achieving this consists of disposing the reflector or a certain part thereof in such a way that it provides only the degree of shielding that is necessary. The degree to which a lamp remains hidden from vision is expressed by the shielding angle, which is the angle formed between the horizontal plane and the direction in which the lamp ceases to be visible, or in other words, below which the luminous source can be seen. Further, the degree of discomfort glare of a lamp or luminaire is also indicated by means of the so-called cut-off angle and which is the angle of a luminaire measured from the nadir between the vertical axis and the line of vision for which the light source starts to be visible.
Generally luminaires of this type, in other words, those constituted by a housing with a set of grouped lamps individually shielded by means of respective reflectors, provide all the light sources with the same characteristics of power, voltage and with the same reflector.
The fact that all the lamps have the same reflector causes a loss in the efficacy of the luminaire as a whole, because in fact the perimeter lamps of said grouping are those that determine the degree of discomfort glare of the luminaire, while those that remain inside will start to glare once the luminaire is already glaring from the lamps more on the perimeter.
The objective of the present invention is, therefore, to provide the market with a new type of luminaire with enhanced efficacy taking advantage of the described circumstances of the incidence of the degree of glare of the lamps which constitute a group according to their more central position or position closer to the perimeter.
On a separate note it must be pointed out that although the market has multiple types and models of luminaires of the type set out herein, there is no knowledge at least on the part of the applicant of the existence of any one that would present technical, structural and constitutive characteristics similar to the ones presented by the one claimed herein.

Explanation of the invention

Thus, the luminaire that the invention proposes, is configured as a noteworthy novelty within its field of application, whose implementation will achieve satisfactorily and comprehensively the objective mentioned above, the characterising details making it possible and distinguishing it from those which the market is already familiar with being conveniently set out in the claims at the end that accompany the present description.
In a specific manner, what the invention proposes is, as already pointed out previously, a luminaire, of the type which incorporates in one same housing a group of lamps with their respective independent reflectors for each one, which presents the particularity of having a configuration and disposition of said lamps and of said reflectors especially studied to extend the cut-off angle and degree of glare in the more interior lamps of the group, with respect to the cut-off angle and degree of discomfort glare of the perimeter lamps of said group, optimising the luminous efficacy of the assembly.
Said optimisation is possible given that, if in some of the lamps which constitute the group of the luminaire the cut-off angle is wider, luminance also increase, meaning that therefore a better result would be obtained using the same power and quantity of said lamps.
Therefore, what the invention proposes is the division of the plurality of the lamps into different concentric rings (which can house one or more lamps with their respective reflectors), in this way, each ring has the same cut-off angle for all the lamps, said angle increasing toward the most inner concentric ring.
The greater efficacy of the luminaire is achieved when all the concentric rings start to glare in unison at a determined distance.
Logically the specific measurements and proportions will be calculated, in each case, so that the line of vision of the cut-off angle of the lamps of the inner concentric rings does not exceed the limits of the line of vision of the cut-off angle of the lamps of the most peripheral ring, in other words, so that the degree of discomfort glare of the luminaire assembly does not increase from the inner rings at a determined distance.
The described luminaire consists, therefore, of an innovative structure with structural and constitutive characteristics unknown until now for purpose for which they are intended, reasons which added to its practical utility, provide it with sufficient grounds for obtaining the privilege of exclusivity that is being sought.

Description of the drawings

In order to complement the description being made and with a view to contributing towards a better understanding of the characteristics of the invention, a set of drawings is attached to the present description as an integral part thereof where, by way of illustration but not limitation, the following has been represented:

figs. 1, 2, 3 and 4: show a view in perspective of different examples of embodiment of the luminaire that is the object of the invention, where : the example of figure 1 is an example of the luminaire with the central reflecting shields having the broadest diameter; the example of figure 2 is an example of the luminaire with the edge of all the reflector shields situated on the same plane but with the central ones being shallower; the example of figure 3 is an example of the luminaire with all the central reflector shields being shallower because the edge thereof is at a different level than that of the perimeter ones; and the example of figure 4 of the same type as that of figure 2 but with a circular instead of matrix distribution of the lamps; having represented in each one of said figures by means of dotted lines, the concentric rings which form the group of lamps of each one;
fig. 5: shows an elevation view in cross-section of the example of the luminaire according to the invention, shown in figure 1, where the different configuration of the reflector screens incorporated by the group of lamps it has in each of its concentric rings;
fig. 6: shows a similar view to the preceding one in which the cut-off angle of each one of the reflector screens of the luminaire has been represented, where it is possible to appreciate the difference in width of said angles between the lamps which are situated in different concentric rings;
figs. 7 and 8: show, respectively, an elevation view in cross-section of the example of the luminaire shown in figure 2, and a similar view with the cut-off angles presented by the reflector screens in said example; and
figs. 9 and 10: show, respectively, an elevation view in cross-section of the example of the luminaire shown in figure 3, and a similar view with the cut-off angles that their reflector screens present.

Preferred embodiment of the invention

In the light of the aforementioned drawings, and in accordance with the adopted numbering, three examples of preferred but not limiting embodiment of the luminaire that the invention proposes can be appreciated from them, comprising the parts and elements indicated and described in detail below.
Thus, as can be seen from said drawings, the luminaire (1) in question is configured, in a conventional manner, on the basis of a housing (2) in which it integrates a group of lamps (3) each one of which has its own reflector screen (4) and at the bottom of which a source of light (5) is situated.
The groups of lamps (3) are disposed in concentric rings (cr⁰, cr¹, cr²,...,cr^n-1, crⁿ) and at least in two rings, all the lamps of the same concentric ring, for example crⁿ, presenting the same cut-off angle aⁿ.
The cut-off angle (aⁿ) of the lamps (3) of each concentric ring (crⁿ) is greater than the cut-off angle (a^n-1) of the lamps (3) of the immediately outer concentric ring (cr^n-1), being the concentric ring (cr⁰) the most peripheral concentric ring (cr⁰).
The greater efficacy of the luminaire (1) at a determined distance (d) is achieved when all the concentric rings (cr) start to glare in unison, which is when the cut-off angles (a) of all the concentric rings (cr) converge at a point at a determined distance.
It is appropriate to point out that, in the examples represented in figures 6, 8 and 10, the cut-off angle of the lamps has been represented in its double projection to one side and the other of each reflector screen, although the eye that represent the point of vision has only been represented on one side of the line of vision, but without having represented the vertical axis of each source of light (5).
Referring to figures 1, 5 and 6, a first option of embodiment of the luminaire (1) is observed wherein the group of lamps (3) forms three concentric rings (cr) and wherein the more inner concentric rings (cr1 and cr2) fulfil the characteristics set out previously, by having reflector screens (4) which, are of identical depth but with a greater diameter on their outer edge than the reflector screens (4) of the lamps (3) of the most peripheral concentric ring (cr⁰), which serves to widen the cut-off angle (a⁰) of said lamps (3) of concentric ring (cr⁰) and enhance the performance of said lamps.
Moreover by having three concentric rings (cr) and to further enhance the performance of the luminaire (1), the lamps (3) of the most inner concentric ring (cr²) also have reflector screens (4) which, having an identical depth, also dispose of a greater diameter on their outer edge than the reflector screens (4) of the lamps (3) of the previous concentric ring (cr¹).
All of this is achieved when the cut-off angles (a) of all the concentric rings (cr) converge at a same point at a determined distance (d).
In figures 2, 7 and 8 a second option of embodiment of the luminaire (1) can be seen wherein the group of lamps (3) forms two concentric rings (cr). The most inner concentric ring (cr¹) fulfils the characteristics set out above by having all the reflector screens (4) of all the lamps (3) having the same diameter, but wherein the source of light (5) in the lamps (3) of the most inner concentric ring (cr¹) is closer to the outer edge of said reflector screen (4) than in the lamps (3) of the most peripheral concentric ring (cr⁰) due to a difference in heights between the sources of light (5) of the lamps (3) of the most peripheral concentric ring (cr⁰) with respect to the sources of light (5) of the lamps (3) of the most inner concentric ring (cr¹), achieving in this way the enhanced efficacy sought.
In figures 3, 9 and 10 a third option of embodiment is observed, likewise with two concentric rings (cr), which in fact would be a variant of the second option, as in this case also the reflector screens (4) of all the lamps (3) of the luminaire (1) are of the same diameter and also the source of light (5) in the lamps (3) of the most inner concentric ring (cr¹) is situated in a position that is closer to the outer edge of the reflector shields (4) than in the lamps (3) of the most peripheral concentric ring (cr⁰), but in this case all the sources of light (5) of the two concentric rings (cr) are at the same height, achieving in this way the enhanced efficacy sought.
Finally, figure 4 shows that it is not necessary for the disposition of the lamps (3) to be square-shaped, as it may be circular or have any other shape, on condition always that two or more concentric rings (cr) can be established within the plurality of the lamps (3).
Having sufficiently described the nature of the present invention, in addition to the way of putting it into practice, it is not considered necessary to extend its explanation for a person skilled in the art to be able to understand its scope and the advantages that derive from it, noting that within its essentiality it may be put into practice in other modes of embodiment which differ in detail from that indicated by way of an example, and to which the protection sought shall likewise extend on condition that its fundamental principle is not altered, changed or modified.

Claims

LUMINAIRE, of the type which integrates a group of lamps (3) each one of which has a reflector screen (4) at the bottom of which a source of light (5) is situated, characterised in that the group of lamps (3) of the luminaire (1) is divided into concentric rings (cr⁰, cr¹, cr²,...,cr^n-1, crⁿ) wherein all the lamps (3) of each concentric ring (cr) have the same cut-off angle (a) and the cut-off angle (a⁰) of the lamps (3) of the most peripheral concentric ring (cr⁰) is less than the cut-off angle (a¹,..., a^n-1, aⁿ) of the lamps (3) of the more inner concentric rings (cr¹,..., Cr^n-1, crⁿ).
LUMINAIRE, according to claim 1, characterised in that the cut-off angle (aⁿ) of the lamps (3) of each concentric ring (crⁿ) is greater than or equal to the cut-off angle (a^n-1) of the lamps (3) of the immediately outer concentric ring (cr^n-1).
LUMINAIRE, according to claim 2, characterised in that the angle (aⁿ) of the lamps (3) of each concentric ring (crⁿ) is greater than the angle (a^n-1) of the lamps (3) of the immediately outer concentric ring (cr^n-1).
LUMINAIRE, according to claim 3, characterised in that the cut-off angles (a) of all the concentric rings (cr) converge at the same point at a determined distance (d).
LUMINAIRE, according to any of claims 1 to 4, characterised in that all the reflector screen (4) of the group of lamps (3) have the same height.
LUMINAIRE, according to any of claims 1 to 4, characterised in that all the reflector screen (4) of the group of lamps (3) have the same diameter.
LUMINAIRE, according to any of claims 1 to 4, characterised in that the sources of light (5) of different concentric rings (cr) are not placed at the same level.
LUMINAIRE, according to any of claims 1 to 4, characterised in that the sources of light (5) of different concentric rings (cr) are placed at the same level but the height of the reflector screens (4) of different concentric rings (cr) are different.