WO2009092927A1

WO2009092927A1 - Light-emitting diode (led) lighting device

Info

Publication number: WO2009092927A1
Application number: PCT/FR2008/051172
Authority: WO
Inventors: Nazih El Yazigi
Original assignee: Expansion Et Developpement
Priority date: 2008-01-22
Filing date: 2008-06-26
Publication date: 2009-07-30
Also published as: FR2926622A1; WO2009092928A1; FR2926622B1

Abstract

The light-emitting diode (LED) lighting device, such as for urban or similar lighting, of the type comprising: a supporting and protective case (24), one face of which lets the light pass through it; fixed carrier means (29), which are fastened to and housed in the case and define a fixed reference frame; a plurality of LEDs (30) with their printed circuits (31) carried by and positionally fastened to the carrier means (29), said LEDs being placed side by side and housed in the case, is characterized in that the successive LEDs of the plurality of LEDs (30) are positioned on the carrier means with progressively different successive relative inclinations so that their axes are in progressively different successive relative angular positions with respect to the reference frame.

Description

Light-emitting diode (LED) lighting device

The invention relates to a lighting device with light-emitting diodes (LEDs).

WO-2006/060905 discloses an urban lighting device comprising two panels, mounted so as to be inclined relative to each other, each panel comprising a plurality of LEDs placed side by side with the same inclination .

US-A-6,676,279, US-A-6,705,744, EP-A-1431653 discloses an LED street lighting device which can each be directed to the target surface to provide in that target surface the desired light intensity.

These documents do not state that these lighting devices would aim to provide an average illuminance of the illuminated surface of the order of at least twenty lux over an area that can reach and even exceed twenty meters in length on more than five meters in width, avoiding the existence of highly illuminated areas and areas with low light.

US-2007/0098334 discloses a light emitting device, without reference to LEDs.

JP-2004-200102 and JP-10241424 disclose light devices.

US-A-6 601 984 discloses a lighting system of the same type, comprising either a solar panel or a horizontal axis wind turbine. The illumination device comprises a plurality of parallel rod-shaped light guides each having one or both electroluminescent electrodes (LEDs) at one or both ends.

The document WO-03/044870 describes a lighting system of the same type, powered by solar or wind energy, the wind turbine being here with a vertical axis. The lighting device comprises a plurality of LEDs arranged parallel to each other, carried by an adjustable support in position relative to an optical part in order to be able to angle - -

of illumination, in the same way and for all LEDs at the same time and in the same way.

In the lighting systems described in these documents, the wind turbine is not optimized.

US-A-4,691,341 and US-A-5,479,159 disclose street lighting control systems.

The invention aims first at providing a lighting device, intended to be part of a lighting system (such as typically street lighting, roads, roads ...), having a plurality of LEDs which provides a mean illuminance of the illuminated surface (typically the ground) of the order of at least twenty lux on a surface that can reach and even exceed twenty meters in length over more than five meters in width. The optimization of this lighting device is such that the plurality of LEDs allows the illumination of an illuminated surface with good brightness constancy avoiding the existence of highly illuminated areas and areas with low illumination.

For this purpose, the invention proposes a light-emitting diode (LED) lighting device, such as urban lighting or the like, of the type comprising:

a support and protection casing, one side of which allows the light to pass,

fixed carrying means, fixed to and housed in the housing, defining a fixed reference,

a plurality of LEDs with their printed circuits carried by and fixed in position to the carrier means, arranged side by side and housed in the housing, characterized in that:

the successive LEDs of the plurality of LEDs are positioned on the carrier means with progressively different successive relative inclinations, so that their axes are in successive relative angular positions progressively different from the reference frame,

the angular positions of the axes of the LEDs, and the openings of the light beams are defined and chosen so that for a surface to be illuminated at a given distance from the lighting device, the plurality of LEDs ensures a total illumination zone; constituted by the plurality of lighting zones of each LED, having a given average illumination and an illumination variation in this area of less than 10%, According to one embodiment, carrier means in the general form of plate, pseudo plate, sheet, pseudo-sheet or the like are provided.

According to one embodiment, there are provided LED positioning means having a free edge shaped with successive sections inclined relative to each other.

According to one embodiment, it is provided that the positioning means of the LEDs are reliefs in hollow or projecting localized with which cooperate complementary reliefs that include or are provided with the LEDs.

According to one embodiment, it is provided that the positioning means of the LEDs are localized markers with which co-operate associated marks which comprise or which are provided with the LEDs.

According to one embodiment, it is provided that the positioning means of the LEDs are localized fastening means with which associated fastening means which comprise or of which the LEDs are provided.

According to one embodiment, there are provided support plates each comprising, on the one hand, a median part placed astride transversely against a support section locating means for positioning the carrier means, on the other hand, one or two parts at least one side of which is fixed at least one printed circuit board and transversely at least one LED.

According to one embodiment, there is provided a locating support section comprising at least one hole or relief of longitudinal positioning of the median portion of the wafer cooperating with a relief or a complementary hole of the median part.

According to one embodiment, there are provided support plates each having one or two lateral portions and a middle portion coplanar or inclined to one another by a given angle.

According to one embodiment, there are provided support plates each having a medial portion and two side portions disposed relative to the medial portion symmetrically or otherwise. - -

According to one embodiment, support plates are provided whose or each of the two lateral parts receives one or two LEDs.

According to one embodiment, a total number of LEDs exceeding forty is provided.

According to one embodiment, there is provided a mean illuminance of the illuminated surface of the order of at least twenty lux over an area at least equal to twenty meters in length by five meters in width.

According to one embodiment, an elongate casing is provided, comprising an opaque upper plate and a lower face allowing the light to pass, the generally plate-shaped carrier means, pseudo plate, web, pseudo-sheet or the like extending in an orthogonal plane. to the opaque top plate.

According to one embodiment, it is provided the integration on the outer face of the opaque upper plate of the housing of at least a portion of means for producing electricity from solar energy, such as a photovoltaic panel.

According to one embodiment, it is provided the integration in the housing of at least a portion of a functional electronic control and control module of the lighting device and, where appropriate, its power supply means.

According to one embodiment, there is provided a functional electronic control and control module of generally flat shape interposed between the inner face of the opaque upper plate of the housing and the carrier means in the general form of plate, pseudo plate, tablecloth, pseudo tablecloth or similar.

According to one embodiment, there is provided a protective portion allowing the associated light to pass removably but with sufficient sealing to the opaque upper plate of the housing further provided with longitudinal end cheeks.

According to one embodiment, there are provided LEDs having varying illumination beam apertures as a function of the surface to be illuminated, in particular LEDs with which lenses are associated.

Several embodiments of the invention will now be described with the aid of the drawings in which: FIG. 1 is an elevational view of a lighting system showing first mast-shaped support means, a lighting device and rotor means comprising blade means, namely the combination of a set with pale Savonius and a set with pale Darrieus,

FIG. 2 is a view on a larger scale of FIG. 1, showing more particularly the lighting device and the Savonius and Darrieus blade rotor means,

FIG. 3 is a perspective view, from below, on a larger scale of FIG. 1, showing more particularly the lighting device towards its lower face allowing light to pass through and the means forming a Savonius blade rotor and a Darrieus blade. ,

FIG. 4 is a perspective view, from above, on a larger scale of FIG. 1, showing more particularly the lighting device towards its opaque top plate and the Savonius blade and Darrieus blade rotor means,

FIG. 5 is a partial perspective view from above, showing in particular the Savonius and Darrieus blade rotor means, and the generator,

FIG. 6 is a partial view, in perspective and in section, from above, showing in particular the Savonius and Darrieus blade rotor means,

FIG. 7 is a partial view, in perspective, from below, showing in particular the Darrieus blade rotor means,

FIG. 8 is a partial view, in axial section, on a larger scale, showing more particularly the first and second support means and the generator,

FIG. 9 is a cross-sectional view, on a larger scale, of a Darrieus blade,

FIG. 10 is a partial exploded perspective view of a Darrieus blade and second support means,

FIG. 11 is a perspective view, from above, of the electric generator,

FIG. 12 is a perspective view, from above, of an aerogenerator showing first support means in the form of a rigid structure that is almost completely open, and rotor means comprising blade means, namely the combination of a blade assembly. Savonius and a set with pale Darrieus,

FIG. 13 is a perspective view, from below, of a lighting device,

FIG. 14 is a partial view, in perspective from below, of the light-emitting diode (LED) carrier means and the LEDs themselves,

FIG. 15 is a perspective view from above, light-emitting diode (LED) carrying means and LEDs themselves, represented in FIG. 14;

FIG. 16 is a view from below of the light-emitting diode (LED) carrying means and the LEDs themselves, represented in FIGS. 14 and 15,

- Figure 17 is a partial view, on a larger scale, in perspective from below, showing more specifically the arrangement of the LEDs on the carrier means, - -

FIG. 18 is a view on a smaller scale in elevation of FIG. 17,

FIG. 19 is a partial view, on a larger scale, of FIG. 18,

FIG. 20 is an elevational view of the generally plate-shaped LED carrying means comprising LED positioning means having a free edge shaped with successive sections inclined relative to one another.

An urban lighting system or the like, elementary 1 (FIGS. 1 to 4), comprises first support means 2, a lighting device 3 comprising in this case a plurality of light-emitting diodes (LEDs) and an aerogenerator 4 comprising means 5 forming a rotor capable of driving under the effect of the wind an electric generator 6, feeding at least one accumulator battery.

Here, urban lighting is understood to mean the illumination of streets, squares, roads, roads, motorways, stadiums, car parks, traffic lanes, playgrounds, or the like, that is to say, typically lighting from a certain height of a surface to be lit important, for public or private use, including industrial or commercial.

The lighting system comprises a main axis 7 which, when the system is in a position to function, is arranged vertically or substantially vertically, in the most common case.

It is with reference to this situation that we must understand the terms "vertical", "horizontal", "high", "low", "superior", "lower", "above", "below" ...

In this case the first support means 1 are in the form of a mast arranged vertically. The lighting device 3 is carried by the mast to its head 8 via an arm 9 of horizontal general direction, as is known per se in the field of lighting masts. The means 5 forming a rotor and the electric generator 6 are carried by the head 8 of the mast, in its extension. The accumulator (s) are placed in a housing located at the foot of the mast or near the foot of the mast. This housing, located in the mast itself, is closed by a hatch 1 1 allowing access while providing the desired protection.

It is understood that the mast 1 may, depending on the functional needs or aesthetic research, not be linear or be inclined to the vertical, being specified while the axis 7 in that it relates to the wind turbine 4 is vertical . - -

The aeratorator 4 is now more specifically described.

The rotor means 5 comprise firstly second support means 12, carried by the first support means 1, pivotable relative thereto about the axis 7 (Figure 8).

In the embodiment shown, the first support means 2 comprise a bearing plate 13, receiving the second support means 12.

The second support means comprise a hub 14 having an axis 7 pivotally mounted about the axis 7, on the bearing plate 13. The arrangement is such that, on the one hand, the hub 14 is guided by so as not to deviate from the axis 7, on the other hand, the friction is minimized.

The rotor means 5 comprise secondly blade means 15 carried by and rigidly fixed to the second support means 12.

Under the effect of the wind, the means 15 are moved and cause the rotor means 5 to pivot about the axis 7.

The blade means 15 comprise the combination of a group of three Savonius blade assemblies 16a, 16b, and 16c radially offset 120 ° from each other and a Darrieus blade assembly 17.

The sets 16a, 16b, and 16c and 17 are in a fixed relative position.

The Darrieus blade assembly 17 is placed radially outside the Savonius blade assemblies 16a, 16b, and 16c.

These sets 16a, 16b, and 16c and 17 with Savonius blade and Darrieus blade extend axially on the same section of the second support means 12, namely the hub 14.

In addition, the three Savonius blade assemblies 16a, 16b and 16c are arranged end to end on the hub 14 of the second support means 12. The Darrieus blade assembly 17, of parabolic type, comprises three blades offset radially at 120 ° from each other, curved in troposkin.

In the embodiment considered, the Darrieus blade has a NACA 015 type profile (National Advisory Committee for Aeonautics) described in the documents of the state of the art accessible to everyone (Figure 9).

The rotor means 5 also comprise two flanges 18 rigidly mounted on or extending or integral with the second support means 12, namely the hub 14. The upper and lower flats 18 are spaced apart axially. They rigidly support the Savonius and Darrieus blades.

A flange 18 further comprises three fastening tabs 19, inclined and arranged radially, adapted to cooperate with additional fixing cavities blades of the set 17 Darrieus blade. The fastening between the tabs 19 and the blades is provided by welding or the like (FIG. 10). For this purpose, the blades of the Darrieus blade assembly 17 are internally hollow, at least in part.

In one embodiment, the rotor means 5 and the electric generator 6 together have an overall axial space between about 1, 25 m and 1, 55 m, more especially close to 1, 40 m and a diameter. all-inclusive between the order of 1, 10 m and 1, 40 m, especially close to 1, 25 m.

The electric generator 6 (Figure 11) is brushless alternator type.

The central stator 20 is fixed on the first support means 2, namely the bearing plate 13. It comprises induced windings with high number of inclined poles.

The rotor 21, external, is fixed on the second support means 12. It comprises permanent magnets with high induction.

The stator 20 and the rotor 21 are encased in a sealed housing 22 provided with means 23 for heat dissipation.

It is understood that the rotor 21 is pivotally driven about the axis 7 by the second support means 12, themselves driven by the rotor means 5 by the action of the wind. In the embodiment considered, the electric generator 6 is thirty-two poles.

At the output of the electric generator 6, there is provided means for converting the energy produced by the electric generator into direct current, and at the output of the conversion means the at least one accumulator battery already mentioned.

In one embodiment, there are four batteries of 12 V - 100 Ah, providing 4.8 kWh.

The LED lighting device 3 (FIGS. 13 to 19) is now more specifically described.

The lighting device 3 comprises firstly an elongate support and protection housing 24 of generally pseudo trapezoidal shape. The housing 24 has a large upper plate 25, opaque. The casing 24 also has a lower face 26 allowing the closed passage to pass through a protective portion 26a such as a transparent cap associated removably but with sufficient sealing to the opaque top plate 25. The casing finally has two cheeks 27 of longitudinal end, one of which is provided with interconnection means 28 with complementary means provided for this purpose towards the end of the arm 9.

It is understood that the general direction of the housing 24 is the horizontal in the simplest case, or by tilting on the horizontal according to the needs of lighting

The lighting device 3 then comprises carrying means 29 in the general form of plate, but may also be in the general form of pseudo plate, web, pseudo tablecloth or the like.

These carrying means 29 are fixed and fixed to and housed in the housing 24. They extend in a plane orthogonal to the upper opaque plate 25. They are therefore placed in a vertical general plane.

These fixed carrier means 29 define a fixed reference for the orientation of the LEDs.

The lighting device 3 then comprises a plurality of LEDs 30 with their printed circuits 31, carried by and fixed in position to the carrier means 29. These LEDs 30 are wired in parallel / series and supplied with an average voltage of + 48V by the battery or batteries.

These LEDs 30 are arranged side by side, in this case in two rows, and they are housed in and protected by the housing 24.

The LEDs 30 are positioned with different relative inclinations on the carrier means 29, so that their axes 30a are in different angular positions with respect to the previously defined reference. More specifically, all the LEDs are inclined relative to each other and with different angles of inclination relative to the carrier means 29. This arrangement is therefore not comparable to that known from the state of the art, in which there are provided several support plates inclined relative to each other, each plate receiving LEDs arranged next to each other, parallel.

The successive LEDs of the plurality of LEDs being positioned on the carrier means with progressively different successive relative inclinations, so that their axes are in successive relative angular positions progressively different from the reference frame,

The angular positions of the axes 30a of the LEDs 30 of the arrangement according to the invention and the openings of the LED illumination beams 30 are defined so that for a surface to be illuminated at a given distance from the lighting device 3, the plurality of LEDs 30 provides a total illumination area, consisting of the plurality of illumination areas of each LED 30, having a given average illumination and an illumination variation in this area of less than 10%.

As indicated, it can be expected that successive LEDs have varying illumination apertures, also depending on the surface to be illuminated. In this sense, it can be expected to associate with LEDs, or some of them, lenses, changing the path of light rays.

With, as in the present case, a lighting device 3 having a total number of LEDs 30 exceeding forty, the average illuminance of the illuminated surface is of the order of at least twenty lux over an area at least equal to twenty meters long and five meters wide. In one embodiment, forty-two LEDs 30 providing a luminous efficiency of 57 lumens / W are provided, the lighting system benefiting from the constant progress of the LEDs.

The arrangement of the LEDs can be determined and adapted to the surface to be illuminated.

The carrier means 29 comprise or are provided with means 32 for positioning the LEDs 30.

In the embodiment shown, the means 32 for positioning the LEDs 30 are the carrier means 29 themselves, having a longitudinal free edge 33 shaped with successive sections 34a, 34b ... inclined with respect to each other.

The sections 34a, 34b... Of the free edge 33 form a locating support for conjugate portions 35 that comprise or are provided with the LEDs 30.

In another embodiment, the means 32 for positioning the LEDs 30 are localized recessed or projecting reliefs with which complementary reliefs that comprise or which are provided with the LEDs 30 cooperate.

In another embodiment, the positioning means 32 for the LEDs 30 are localized markings with which associated markings are associated with or are provided with the LEDs 30.

In another embodiment, the means 32 for positioning the LEDs 30 are localized fastening means with which associated fixing means comprise or are provided with the LEDs 30.

In the embodiment shown, in which the means 32 for positioning the LEDs 30 are the bearing means 29 on board 33 shaped in successive sections 34a, 34b ... inclined, there is provided a plurality of support plates 36 of the LEDs 30 themselves. fixed with the positioning and the desired inclination on the bearing means 29.

Each support plate 36 comprises first of all a middle part 37 placed astride transversely against a locating bearing section 34a, 34b ... means 32 for positioning the carrier means 29. - -

Each support plate 36 has secondly, in this case, two lateral parts 38.

On each side portion 38 is flatly fixed at least one printed circuit 31 and, transversely, at least one LED 30.

For a given wafer 36, the middle part 37 and the lateral part or parts 38 are either coplanar or inclined to one another by a given angle.

On the other hand, for a given wafer 36, the two lateral portions 38 are arranged relative to the middle part 37 either symmetrically or non-symmetrically, then being inclined to one another by a given angle.

A locating bearing portion 34a, 34b ... comprises, in the embodiment shown a hole 39 for longitudinal positioning of the medial portion 37 of the plate 36 along the edge 33, cooperating with a relief 40 complementary to the middle portion. 37. Of course, different but functionally equivalent means may be provided.

In this case, in the embodiment shown, the lateral parts 38 receive all or almost all of the LEDs 30.

According to one embodiment, integration with the lighting device 3, and more particularly on the outer face of the opaque upper plate 25 of the casing 24 of at least a portion of the means for generating electricity from the outside, is provided. solar energy, such as a photovoltaic panel. In this case, it is combined with the wind turbine generation means of electricity from solar energy.

Such an embodiment allows an additional production of up to 200 Wh.

The lighting system also comprises a functional electronic control and control module 41 of the lighting device 3.

In the embodiment considered, this functional electronic control and control module 41 is integrated at least partly in the housing 24 of the lighting device 3. For this purpose, the electronic module 41, of generally flat shape, is interposed between the inner face of the upper opaque plate 25 of the housing 24 and the carrier means 29 in the general form of plate.

The functional electronic control and control module 41 is able to perform all or part of the following functions: safety blocking of the rotor means 5 from a wind speed threshold, detection of possible malfunction, control of the device lighting 3 powered electrically from the wind generator 4, regulating the charge and discharge of the at least one accumulator battery, where appropriate integrating wind power generation with produced energy from solar energy.

In one embodiment, it is provided that the rotor means is slowed down or prevented from pivoting if the wind speed reaches or exceeds 20 m / s or 200 km / h.

According to one embodiment, it is planned to combine with the wind generator 4 with remote control means.

A complex lighting system comprising at least one, and most often several elementary lighting systems 1 as just described (for example along a path), further comprises a control station by radio link lighting or extinction of - or - elementary lighting systems 1. In this case, the electronic module 41 is responsive to the radio control and provides control of - or - lighting devices 3.

Such a complex lighting system may, therefore, include several elementary lighting systems 1.

According to another embodiment (Figure 12), the first support means 2 are not in the form of a mast as described above, but in the form of a structure 42, rigid, almost completely open. Such a structure 42 can be made from tubes or profiles assembled rigidly with each other. Such a structure 42 forms a free space in which are housed the rotor means 5 and the electric generator 6. Such a structure may include feet 43 allowing it to rest on the ground. The use of tubes or thin sections makes it possible not to affect the effect of the wind on the rotor means. - -

This embodiment allows the use of larger rotor means 5, the wind turbine can be more powerful.

Claims

A light emitting diode (LED) lighting device, such as street lighting or the like, of the type comprising:

a support and protection casing, one side of which allows the light to pass,

fixed carrying means, fixed to and housed in the housing, defining a fixed reference frame,

a plurality of LEDs with their printed circuits carried by and fixed in position to the carrier means arranged side by side and housed in the housing, characterized in that,

the angular positions of the axes of the LEDs, and the openings of the lighting beams being defined and chosen so that for a surface to be illuminated at a given distance from the lighting device, the plurality of LEDs ensures a total illumination zone; constituted by the plurality of lighting zones of each LED, having a given average illumination and an illumination variation in this area of less than 10%,

2. Lighting device according to claim 1, characterized by carrying means in the general form of plate, pseudo plate, web, pseudo tablecloth or the like.

3. Lighting device according to any one of claims 1 and 2, characterized by LED positioning means having a free edge shaped with successive sections inclined relative to each other.

4. Lighting device according to any one of claims 1 to 3, characterized in that the positioning means of the LEDs are reliefs recessed or projecting localized with which cooperate complementary reliefs that comprise or which are provided with LED.

5. Lighting device according to any one of claims 1 to 3, characterized in that the positioning means of the LEDs are localized landmarks with which cooperate associated landmarks that include or are provided with the LEDs. - -

6. Lighting device according to any one of claims 1 to 3, characterized in that the positioning means of the LEDs are localized fixing means with which cooperate associated fastening means that comprise or are provided with the LEDs. .

7. Lighting device according to any one of claims 1 to 3, characterized by support plates each comprising, on the one hand, a middle portion straddling transversely against a support section locating the positioning means of the carrier means, on the other hand, one or two lateral parts, on at least one of which is fixed flat at least one printed circuit and, transversely, at least one LED.

8. Lighting device according to claim 7, characterized by a locating support section comprising at least one hole or longitudinal positioning relief of the middle portion of the wafer cooperating with a relief or a complementary hole of the middle portion.

9. Lighting device according to any one of claims 7 and 8, characterized by support plates each having one or two side portions and a middle portion coplanar or inclined to one another by a given angle.

10. Lighting device according to any one of claims 7 to 9, characterized by support plates each having a middle portion and two side portions disposed relative to the medial portion symmetrically or not.

11. Lighting device according to any one of claims 7 to 10, characterized by support plates whose or each of the two side portions receives one or two LEDs.

12. Lighting device according to any one of claims 1 to 11, characterized by a total number of LEDs exceeding forty.

13. Lighting device according to any one of claims 1 to 12, characterized by a mean illuminance of the illuminated surface of the order of at least twenty lux over an area at least equal to twenty meters in length over five meters in width. - -

14. Lighting device according to any one of claims 2 to 13, characterized by an elongate housing, having an opaque upper plate and a lower face allowing light to pass through, the carrier means in the general form of plate, pseudo plate, tablecloth , pseudo tablecloth or the like extending in a plane orthogonal to the opaque upper plate.

15. Lighting device according to claim 14, characterized by the integration on the outer face of the opaque upper plate of the housing of at least a portion of means for generating electricity from solar energy, such as a voltaic photo panel.

16. Lighting device according to any one of claims 1 to 15, characterized by the integration in the casing of at least part of a functional electronic control and control module of the lighting device and, the where appropriate, its power supply means.

17. Lighting device according to claim 16 and in that it incorporates claim 14, characterized by a functional electronic control and control module of generally flat shape interposed between the inner face of the opaque upper plate of the housing and the carrying means in the general form of plate, pseudo plate, tablecloth, pseudo tablecloth or the like.

18. Illumination device according to any one of claims 1 to 17, characterized by a protective portion allowing the associated light to pass removably but with sufficient sealing to the opaque upper plate of the housing further provided with cheeks. longitudinal end.

19. Lighting device according to any one of claims 1 to 18, characterized by LEDs having apertures lighting beams variable depending on the surface to be illuminated, including LEDs which are associated with lenses.