as) United States
`a2) Patent Application Publication 10) Pub. No.: US 2008/0212329 Al
`Duguayetal.
`(43) Pub. Date:
`Sep. 4, 2008
`
`US 20080212329A1
`
`(76)
`
`(54) ASSEMBLY OF LIGHT EMITTING DIODES
`FOR LIGHTING APPLICATIONS
`Inventors:
`Louis Duguay, Hudson (CA);
`Rachid Chaffai, Saint-Hubert
`(CA); Christian de Varennes, Ville
`Mont-Royal (CA)
`
`Related U.S. Application Data
`(60) Provisional application No. 60/633,445,filed on Dec.
`7, 2004.
`
`Publication Classification
`
`(51)
`
`Int. Cl.
`(2006.01)
`F21V 7/00
`(52) US. CD. eee ceceeectesesenscneecessescneneeansenees 362/310
`
`Correspondence Address:
`ABSTRACT
`(57)
`VENABLE LLP
`P.O. BOX 34385
`An assembly of light emitting diodes for a streetlight or the
`WASHINGTON,DC 20043-9998 (US)
`likes comprises a first board having a first matrix of light
`emitting diodes (LEDs) mounted thereon definingafirst light
`(21) Appl. No.:
`11/792,546
`projection plane andat least another board having a second
`matrix of LEDs mounted thereon defining a second light
`projection plane. The other boards are mountedto the first
`boardso as to define an angle therebetween. The LEDscan be
`mounted to the boardsso as to independently define and angle
`therewith. They can also be oriented towardsprivileged direc-
`tions. The present assembly allows providing a more uniform
`light distribution.
`
`(22) PCT Filed:
`
`Dec. 6, 2005
`
`(86) PCT No.:
`
`PCT/CA2005/001847
`
`§ 371 (c)),
`(2), (4) Date:
`
`Apr. 28, 2008
`
` -
`
`a.
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`
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`

`

`Patent Application Publication
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`Sep. 4, 2008 Sheet 1 of 14
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`US 2008/0212329 Al
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`—1==—_1 (PRIOR ART)
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`Patent Application Publication
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`Sep. 4, 2008 Sheet 2 of 14
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`Patent Application Publication
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`Sep. 4, 2008 Sheet 3 of 14
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`US 2008/0212329 Al
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`Sep. 4, 2008 Sheet 4 of 14
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`Patent Application Publication
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`Patent Application Publication
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`Sep. 4, 2008 Sheet 5 of 14
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`Patent Application Publication
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`Sep. 4, 2008 Sheet 6 of 14
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`Patent Application Publication
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`Sep. 4, 2008 Sheet 7 of 14
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`Patent Application Publication
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`Sep. 4, 2008 Sheet 8 of 14
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`Patent Application Publication
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`Sep. 4, 2008 Sheet 9 of 14
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`US 2008/0212329 Al
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`Petitioner Ensign
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`

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`Patent Application Publication
`
`Sep. 4, 2008 Sheet 10 of 14
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`US 2008/0212329 Al
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`Petitioner Ensign
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`

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`Patent Application Publication
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`Sep. 4, 2008 Sheet 11 of 14
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`US 2008/0212329 Al
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`Exhibit 1031 - Page 12 of 20
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`Petitioner Ensign
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`

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`Patent Application Publication
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`Sep. 4, 2008 Sheet 12 of 14
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`US 2008/0212329 Al
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`Exhibit 1031 - Page 13 of 20
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`Exhibit 1031 - Page 13 of 20
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`

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`Patent Application Publication
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`Sep. 4, 2008 Sheet 13 of 14
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`US 2008/0212329 Al
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`Petitioner Ensign
`Exhibit 1031 - Page 14 of 20
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`Petitioner Ensign
`Exhibit 1031 - Page 14 of 20
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`

`

`Patent Application Publication
`
`Sep. 4, 2008 Sheet 14 of 14
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`US 2008/0212329 Al
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`Exhibit 1031 - Page 15 of 20
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`Petitioner Ensign
`Exhibit 1031 - Page 15 of 20
`
`
`
`
`

`

`US 2008/0212329 Al
`
`Sep. 4, 2008
`
`ASSEMBLY OF LIGHT EMITTING DIODES
`FOR LIGHTING APPLICATIONS
`
`FIELD OF THE INVENTION
`
`at least one board of light emitting diodes (LEDs)
`[0015]
`defining a light projection plane; at least some LEDsofat
`least oneofthe at least one board of LEDsdefining an angle
`with at least one of the at least one board of LEDs.
`
`[0001] The present inventionrelates to lighting. More spe-
`cifically, the present invention is concerned with an assembly
`of light emitting diodes for lighting applications such as in
`streetlights.
`
`BACKGROUND OF THE INVENTION
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`[0016] According to a fourth aspect of the present inven-
`tion, there is provided an assemblyoflight emitting diodes for
`a light comprising:
`[0017]
`a first board including a first set of light emitting
`diodes (LEDs) mounted thereon;
`[0018]
`at least one other board including a second set of
`LEDs mounted thereon; the at least one other board being
`[0002] Conventional streetlights include a metal halide,
`mountedto the first board so as to define an angle therewith.
`mercury or sodium light bulb. Even though such conventional
`[0019]
`Finally, according to a fifth aspect of the present
`streetlights light usually includeareflector to project the light
`invention, there is provided an assembly of light-emitting
`towards an areato illuminate,a first drawback ofconventional
`diodes (LEDs) for a light comprising:
`streetlights is that they waste energy since the light bulb
`[0020]
`a plurality of slats pivotably mountedto a frame so
`illuminatesin all direction, even though illumination is only
`as to define a loover assembly; each the slats including a
`required towardsthe street. Another drawbackofstreetlights
`matrix of LEDs mounted thereto; and
`provided with a light bulb is that they generate a high lumi-
`[0021]
`a mechanism for pivoting each theslatsrelative to
`nosity right below the bulb which diminishes quickly as the
`the frame, thereby allowing to define and modify relative
`distance from the bulb increases.
`angles between the slats and the frame.
`[0003] A partial solution to these drawbackshas been pro-
`[0022] Other objects, advantages and features of the
`posed with the introductionofstreetlights 10 provided with a
`present invention will become more apparent upon reading
`light emitting diode (LEDs) assembly 12. Examples of such
`the following nonrestrictive description ofpreferred embodi-
`streetlights are shown in FIG.1 of the appended drawings.
`ments thereof, given by way of example only with reference
`[0004]
`Thestreetlights 10 share the second drawbackofthe
`to the accompanying drawings.
`bulb light-basedstreetlight in that they generate a high lumi-
`nosity right below the bulb which diminishes quickly as the
`distance from the bulb increases. Also, with such a light
`assembly, a high percentageof lightis still lost.
`[0005]
`Finally, a common drawback of both bulb-based
`light assemblies and of current LEDs assembliesis that they
`cause light pollution by providing light whereit is not desired.
`[0006] A streetlight providing a more uniform lightdistri-
`bution is thus desirable.
`
`OBJECTS OF THE INVENTION
`
`[0007] An object of the present invention is therefore to
`providea streetlight free of the above-mentioned drawbacks.
`[0008] Another object of the invention is to provide an
`improved assembly of light emitting diodes for a light.
`
`SUMMARYOF THE INVENTION
`
`In the appended drawings:
`[0023]
`FIG. 1, which is labeled “Prior Art”is a perspective
`[0024]
`view of a streetlight according to the priorart;
`[0025]
`FIG. 2 is a perspective view of an assembly oflight
`emitting diodes for a streetlight accordingtoa first illustrative
`embodimentof the present invention;
`[0026]
`FIG. 3 is a bottom plan view of the assembly from
`FIG.2;
`FIG. 4 is a cross-section of the assembly from FIG.
`[0027]
`2, taken along line 4-4 on FIG.3;
`[0028]
`FIG. 5 is a schematic view illustrating the uniform
`light distribution obtained by the assembly from FIG.2;
`[0029]
`FIGS. 6A-6B are schematic viewsillustrating the
`effect of the orientation of the LEDs of the assembly from
`FIG.2;
`FIG. 7 is a schematic partial cross-section of two
`[0030]
`[0009] More specifically, in accordance with the present
`facing boards with LEDs from the assembly of FIG.2, illus-
`invention, there is provided an assembly of light emitting
`trating the angle a between the LEDsandthe boards;
`diodes for a light comprising:
`[0031]
`FIG. 8 is a perspective view of an assembly oflight
`[0010]
`a first board having a first matrix of light emitting
`emitting diodes for a streetlight according to a secondillus-
`diodes (LEDs) mounted thereon defininga first light projec-
`trative embodimentof the present invention;
`tion plane;
`[0032]
`FIG. 9 is a cross section of an assembly of light
`[0011]
`a second board having a second matrix of LEDs
`emitting diodesfor a streetlight according to a third illustra-
`mounted thereon defining a secondlight projection plane; the
`tive embodimentofthe present invention;
`second board being mountedto the first board so as to define
`[0033]
`FIG. 10 is a cross section of an assembly oflight
`a first angle therebetween.
`emitting diodesfor a streetlight accordingto a fourth illustra-
`[0012] According to a secondaspectof the present inven-
`tive embodimentofthe present invention;
`tion, there is provided an assemblyoflight emitting diodes for
`[0034]
`FIG. 11 is a cross section of an assembly oflight
`a light comprising:
`emitting diodes fora streetlight accordingto a fifth illustrative
`
`[0013] atleast one board includingaplurality oflight emit-
`embodimentof the present invention;
`ting diodes (LEDs) mounted thereon; a first group of the
`[0035]
`FIG. 121isa perspective view of an assemblyoflight
`plurality of LEDs being mountedto the board so as to define
`emitting diodes for a streetlight according to a sixth illustra-
`a first acute angle therewith; thefirst group of the plurality of
`tive embodimentofthe present invention;
`LEDsdefininga first light projection plane.
`[0014] According to a third aspect of the present invention,
`[0036]
`FIG. 13 isa perspective schematic view ofan assem-
`there is provided an assembly of light emitting diodes for a
`bly of light emitting diodes for a streetlight according to a
`light comprising:
`seventh illustrative embodimentofthe present invention;
`
`Petitioner Ensign
`Exhibit 1031 - Page 16 of 20
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`Petitioner Ensign
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`

`

`US 2008/0212329 Al
`
`Sep. 4, 2008
`
`FIG. 141s a perspective schematic view ofan assem-
`[0037]
`bly of light emitting diodes for a streetlight according to an
`eighth illustrative embodimentofthe present invention;
`[0038]
`FIG. 15 is a side schematic view of an assembly of
`light emitting diodes for a streetlight according to a ninth
`illustrative embodimentof the present invention;
`[0039]
`FIG. 16is a front perspective view of an assembly of
`light emitting diodes for a light accordingto a tenth illustra-
`tive embodimentof the present invention; and
`[0040]
`FIG. 17 is a graph showing comparison results
`between lights accordingto the prior art and a light provided
`with an assembly of LEDsaccordingto an eleventh illustra-
`tive embodimentofthe present invention.
`
`nation distance is only two timesthe height of the pole fora
`matrix of LEDsoriented parallel to the surface to illuminate.
`[0047] Each tilted LED 16 is further pivoted from an angle
`a away from the horizontal pole 24. This pivoting of the LED
`16 allows directing the light incoming from the LEDs 16
`towards a morespecific area to illuminate.
`[0048] This is schematically illustrated in FIGS. 6A and
`6B. FIG. 6A illustrates a top plan view of the assembly of
`LEDs 14 positioned on top of a sidewalk 28 anda street 30,
`just at the boundary thereof. FIG. 6B showsthat pivoting the
`LEDs16 in the direction of the street 30, yields a substantial
`increase of illumination on the street side 30 compare to the
`sidewalk side 28.
`
`DESCRIPTION OF THE PREFERRED
`EMBODIMENT
`
`[0041] An assembly 14 of light emitting diodes 16 for a
`streetlight
`(not shown) according to a first
`illustrative
`embodimentof the present invention will now be described
`with reference to FIGS. 2-4.
`
`[0042] The assembly 14 comprises twopairs of boards 18,
`each including a matrix of light emitting diodes (LEDs) 16
`mounted thereon, each pair of boards 18 being mounted in a
`respective flat casing or panel 20 defining a respective light
`projection plane. The two panels 20 are pivotably mounted to
`one anothervia a central shaft 22 so as to be movable between
`a first extended position, wherein the two panels 20 lay gen-
`erally in the same plane, and a secondpartially closed posi-
`tion, wherein the two panels 20 define an angle (180°-2)
`therebetween.
`
`[0049] A mechanism 32 is provided to modify the angle
`of the panels 20 including the boards 18, allowing to vary the
`illumination from a moreintense illumination below the light
`assembly 10 to a more distribute illumination.
`[0050] Returning to FIG.4, the mechanism 32 comprises a
`screw 34 rotatably inserted in a complementary aperture on
`top of the hollow shaft 22 and twoside plates 36 each having
`a respective rod portion 37 extending therefrom and received
`in a respective lateral slot 38 in the hollow shaft 22. The
`proximal ends of the rod portions 37 include an annular
`portion 40 for complementary engagementwith the screw 34.
`Washers 42 are also provided for securing the annular por-
`tions 40 and therefore the two side plates 36 to the screw 34.
`The mechanism 32 further comprises a knob 44, secured to
`portion of the screw 34 extending out of the hollow shaft 22.
`[0051]
`In operation of the mechanism 32, rotation of the
`knob 32 in a first direction allows to move the panels 20
`towards one another, thereby increasing the angle @, while
`rotation ofthe knob 32 in an oppositedirection allows moving
`the panels 20 away from each other thereby minimizing the
`angle @. It is remindedthat the angle 0 remains fixed during
`the operation of the mechanism 32.
`[0052] The assembly 14 includesa typical density of 70
`mm per LED. Ofcourse, the number of LEDs 16 per boards,
`of boards 18 and of panels 20 may vary without departing
`from the spirit and nature of the present invention. The gen-
`eral configuration of the assembly may also vary as will be
`described furtherin.
`
`[0053] Turning now to FIG.8, an assembly 46 of LEDs for
`a streetlight according to a secondillustrative embodiment of
`the present invention will now be described. Since the assem-
`bly 46 is very similar to the assembly 14 from FIGS. 2-4, and
`for concision purposes, only the differences between the two
`assemblies will be described herein in more details.
`
`[0043] The assembly 14is secured to the horizontal pole 24
`ofa streetlight pole (not shown)via its central shaft 22 so that
`the panels 20 are generally oriented towards the area to illu-
`minate. A system for controlling the matrix of LEDs 16 is
`provided betweenthe utility line (not shown) and the matrix
`of LEDs16. As can be better seen from FIGS. 2 and 3, such
`controlling system 26, which includes a powerconverter, can
`be mountedat the proximate end ofthe shaft 22.
`[0044] As can be better seen from FIG. 4, each LED 16 is
`mounted to a respective board 18 so asto be tilted towards the
`board in the direction of the central shaft 22, defining a first
`angle 6 with the board 18. Accordingto thefirst illustrated
`example, this first angle 6 is about 45 degrees. Asillustrated
`in FIG.7,the first angle 0 is selected so as to yield a maximum
`line of sight for each LED 16, providing the maximum illu-
`mination and minimizing the lost of lumens. This maximum
`illumination is however achieved when the boards 18 are
`[0054] According to this secondillustrative embodiment,
`angled relatively to the area to illuminate as will now be
`the controlling system (not shown)is included in the panels
`explained.
`20', for example between the boards (not shown) and the
`[0045] Returning to FIG.4, each panel 20s partially closed
`panels 20'.
`so as to define a second angle o with the plane defined by the
`[0055] According to this secondillustrative embodiment,
`first extended position ofthe panels 20. It has been foundthat,
`the panels 20' are hingedly mounted to the shaft 50 and the
`for a given lumen per LED, a maximum luminosity can be
`angle
`of the panels 20' can be adjusted manually. A lock
`achieved with the LEDs 16 tilted to an angle 9 of about
`mechanism (not shown) operatively coupled to the panels 20'
`between 20 to 90 degrees andthe panels 20 partially closed so
`allows to lock the selected position of the panels. The lock
`as to yield a second angle o of about 15 to 20 degrees. The
`mechanism includes an input slot 52, operable via an allen
`panels 20 generally define a concavelight projector.
`key or anothertool.
`[0046]
`Indeed, as it has been mentioned hereinabove, the
`[0056] Anassembly 54 of LEDs16 forastreetlight accord-
`use of a single board having LEDs perpendicularly mounted
`ing to a thirdillustrated embodimentofthe present invention
`thereon generates a high luminosity right below the bulb
`will now be described with reference to FIG.9.
`which however diminishes quickly as the distance from the
`bulb increases. Asillustrated in FIG.5, the tilting ofthe LEDs
`from about 45 degrees for example yields an illumination
`distance about three timesthe height of the pole. This illumi-
`
`[0057] The assembly 54 comprises two adjacent boards 56
`of LEDspivotably mounted in a casing 58 via a board mount-
`ing and adjustable mechanism 60. The openside ofthe casing
`
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`US 2008/0212329 Al
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`Sep. 4, 2008
`
`58 is provided with a transparent wall 62 made of glass,
`acrylic or polycarbonate for example.
`[0058] Each LED 16 is mountedto a respective board 56 so
`as to be tilted towards the adjacent board 56, defining a first
`angle 0 of about 45 degrees.
`[0059] Ofcourse, the assembly 54 further comprises a LED
`controlling system (not shown) for connecting the LEDs 16 to
`the utility line (not shown).
`[0060] The two boards 56 are joined by a hinge 64.
`[0061] The board mounting and adjustable mechanism 60
`comprises a screw 66 rotatably securedto the top wall 68 of
`the casing 58 and lever arms 70 (two shown) for pivotably
`mounting the boards 56 to the screw 66. Morespecifically, the
`distal end of each lever arm 70 is pivotably mounted to a
`respective board 56 via a first pivot joint 72. The proximate
`end of each lever arm 70 is pivotably secured to the screw 66
`via a bolt assembly 74 having secondpivot joints 76 mounted
`onits periphery.
`[0062] A knob 78 is provided at the end of the screw 66
`extending from the casing 58.
`[0063]
`Inoperation, rotation ofthe screw 66 (arrow 80) ina
`first direction using the knob 78 causes the downwardtrans-
`lation of the bolt 74, which in turn causes the boards 56 to
`movebetweena first extendedposition (illustrated in FIG.9),
`wherein the two boards 56 lay both in a horizontal plane, and
`a secondpartially closed position, wherein each of the two
`boards 56 defines an angle > with the horizontal (illustrated in
`dashedline in FIG. 9). Rotation ofthe screw 66 in the opposite
`direction allows diminishing the angle 9.
`[0064] Of course, the number and configuration of the
`boards 56 may vary. The board mounting and adjustable
`mechanism 60 may also be modified without departing from
`the spirit and nature of the present invention.
`[0065]
`For example, as illustrated in FIG. 10, the length of
`lever arms 84 securing one of the boards 86 can be different
`than the other lever arms 70, thereby allowing to modify the
`angle ¢' between the board 86 and the horizontalat a different
`pace than the other angle o upon rotation of the knob 78.
`[0066] Anassembly 88 of LEDs16 fora streetlight accord-
`ing to a fifth embodimentofthe present invention will now be
`described with reference to FIG.11.
`
`Since the assembly 88 is very similar to the assem-
`[0067]
`bly 54, and for concision purposes, only the differences
`between the two assemblies will be described herein in more
`detail.
`
`[0068] Accordingto this fifth illustrative embodiment, each
`of the boards of LEDs 56 is secured to the casing 58 via an
`independent board mounting and adjustable mechanism 90
`allowing to independently adjust the angle between the board
`56 and the horizontal for example.
`[0069] Even though the mechanisms90 to adjust the angle
`of the boards of LEDs according to the above illustrated
`embodimentsare all manually activated, a motor (not shown)
`can also be providedtotilt the boards of LEDs 56. This motor
`can be activated using a button or another user’s input means
`provided on the assembly ofLEDs88 or provided on a remote
`control. Of course,
`in that case, a wireless receiver (not
`shown) would be included with or connected to the LEDs
`controlling system.
`[0070] Anassembly 92 of light emitting diodes fora stree-
`tlight according to a sixth illustrative embodiment of the
`present invention will now be described with reference to
`FIG. 12.
`
`[0071] The assembly 92 comprises a receptacle 94, includ-
`ing a side aperture 96 for mounting to the horizontal pole ofa
`street pole (both not shown), a plurality of boards of LEDs
`98-104 secured to the receptacle 94 and a system for control-
`ling the LEDs (not shown)received in the receptacle 94.
`[0072] Morespecifically, the assembly 92 comprises a cen-
`tral board of LEDs 98 to be positioned generally parallel to
`the area to illuminate and defining a first light projection
`plane. The assembly 92 further comprises two lateral boards
`of LEDs 100 mountedto the first board of LED so asto define
`an angle therewith and defining second and third light pro-
`jection plane. Front and back boards ofLEDs 102 and 104are
`each secured to the two lateral boards 100 therebetween and
`to the central board 98 at opposite ends thereof. The boards of
`LEDs 98-104 together define a convex light projector. Each
`LED 106 is secured to its respective board so as to extend
`perpendicularly therefrom.
`[0073] The number and configuration of the boards of
`LEDs may of course vary. FIGS. 13 and 14 illustrate two
`general configurations of assembly of LEDsfor a streetlight
`according respectively to a seventh and an eight illustrative
`embodimentof the present invention.
`[0074] According to a further embodimentof the present
`invention, there is provided a casing or a support frame (not
`shown) having a plurality of grooves, channels or any other
`meansto adjustably receive boards of LEDs. According to
`this embodiment, different assemblies of LEDs can be
`achievedby inserting the boardsin different grooves or chan-
`nels. Different means can be provided to removably, secure
`the boards in place, including snapfitting, fasteners, etc.
`[0075]
`FIG. 15 illustrates an assembly 108 of LEDsfor a
`streetlight according to an eight illustrative embodiment of
`the present invention.
`[0076] The assembly 108 comprises two boards of LEDs
`110 mounted adjacent one another so as to define an acute
`angle therebetween.It is to be noted that the assembly 108 is
`only schematically illustrated in FIG. 15. It further includes a
`frameor a casing (not illustrating) for receiving and support-
`ing the boards 110 and a system for controlling the LEDs(not
`shown) to be connectedto the utility line.
`[0077] The assembly 108 mayfurther include a mechanism
`(not shown)for modifying the angle @ between the two boards
`110. It is to be noted that, contrarily to the assembly 14 where
`the LEDs 16 are mountedon facing sides of the boards 18 for
`adjacent panels 20, the LEDs 16 are mounted on opposite
`sides of the boards 110.
`
`[0078] The angle » between the two boards 110 is only
`limited by the dimensionsofthe boards 110 with the LEDs 16
`and thus can have typically any values from near zero (0)
`degrees to more than 340 degrees. The same can be said when
`the LEDs are mounted on facing sides of the boards as illus-
`trated, for example, in FIG. 4.
`[0079] Turning now to FIG. 16, an assembly 112 oflight
`emitting diodesfor a lighting application according to a tenth
`illustrative embodimentofthe present invention will now be
`described.
`
`[0080] The assembly 112 comprisesa plurality of slats 114
`(four illustrated) pivotably mounted to a frame 116 so as to
`define a loover. Each slat 114 includes a matrix of LEDs 118.
`Each of the LEDs is of course to be connected to a power
`source (not shown) via controlling system (not shown).
`[0081] A mechanism (not shown) is provided to adjust the
`angle of the slats 114. Since such mechanism allowing to
`simultaneously or independently adjusting the angles of the
`
`Petitioner Ensign
`Exhibit 1031 - Page 18 of 20
`
`Petitioner Ensign
`Exhibit 1031 - Page 18 of 20
`
`

`

`US 2008/0212329 Al
`
`Sep. 4, 2008
`
`slats 114 are believed to be well-known in the art, and for
`concision purposes, they will not be described herein in more
`detail.
`
`a type II medium cut-off, model HPRC-GL-2-100-T-LL and
`the second oneis a type II] medium cut-off, model HPRC-
`GL-#-100-T-LL.
`
`[0082] The three (3) rows of LEDs near the longitudinal
`edges of the slats 114 are mountedto the slats 114 so as to
`define an angle therewith. More specifically, the angle is
`inversely proportional with the distance from the nearest side
`edge of the frame 116. This configuration of LEDs allows
`providing a more distribute illumination by orienting some of
`the light on the lateral sides of the assembly 112.
`[0083] Ofcourse, the numberslats 116 and the number of
`LEDs 118 on each slat 116 may vary. The slats 116 may also
`be mounted to any structure so as to yield the louvers func-
`tionality.
`[0084] Also, any configuration of LED angle on eachslatis
`possible and is not limited to the one illustrated.
`[0085] Experimental results have been compared between
`a two-board assembly of LEDs according to an eleventh
`illustrative embodimentof the present invention and Type II
`and II Cobra lights from the Cooper Lighting society. The
`results have been obtained considering the assembly accord-
`ing to the present invention and the Cobra lights mounted on
`top of a 25 feet pole.
`
`Type of LED
`
`(20 deg) Brite Led BL-LBUW5N20C
`(45 deg) C9045ULWW (45)
`
`Typical Intensity
`
`12600 med
`5311 med
`
`BOARD #1
`
`Brite Led BL-LBUW5N20C
`Brite Led BL-LBUW5N20C
`C9045ULWW (45)
`C9045ULWW (45)
`Brite Led BL-LBUW5N20C
`Brite Led BL-LBUW5N20C
`
`Aim X
`-60
`-60
`-22
`-10
`0
`0
`
`Aim Y
`10
`30
`26
`-8
`30
`10
`
`Qty of LEDS
`130
`150
`120
`60
`30
`10
`
`BOARD #2
`
`Brite Led BL-LBUW5N20C
`Brite Led BL-LBUW5N20C
`C9045ULWW (45)
`C9045ULWW (45)
`Brite Led BL-LBUW5N20C
`Brite Led BL-LBUW5N20C
`
`Aims X
`60
`60
`22
`10
`0
`0
`
`Aim Y
`10
`30
`26
`-8
`30
`10
`
`Qty of LEDS
`130
`150
`120
`60
`30
`10
`
`where “Aim X”represents the point on the ground where the
`LEDsare aimedat (parallel to the street); and
`[0086]
`“Aim Y”represents the point on the ground where
`the LEDs are aimed at (perpendicular to thestreet).
`[0087]
`Thelight distribution obtained with the above LED
`assembly as been compared with two 100 W HPS 9200
`Lumenclearlens light from Cooper Lighting. Thefirst one is
`
`[0088] The comparison results are illustrated in FIG. 17,
`which clearly show that a more distribute illumination is
`obtained with the assembly of LEDs accordingto the present
`invention.
`
`[0089] As enlighten by the last example, an assembly of
`LEDsfor a light according to the present invention can be
`provided with different types of LEDs, even on a sameboard.
`For example, some LEDs mayhave a 20 degrees light pattern,
`wherein an intensity of 50 percent is obtained at 10 degrees
`from the longitudinal axis, while other LEDs may have 30,
`40, 45 or 60 degrees pattern with different maximum intensity
`for example. Since such LEDpattern is believed to be well
`knownin the art, and for concision purposes, they will not be
`described herein in more detail. Also, LEDs having different
`colors can also be provided in the assembly or in a single
`board.
`
`invention has been
`[0090] Even though the present
`described by way of reference to illustrative embodiments
`whereall LEDs on a boardare bentortilted so as to define a
`commonangle, an assembly according to the present inven-
`tion is not limited in such a way. Indeed, a single board may
`include different LEDstilted so asto define different angles to
`simultaneously illuminate in different directions.
`[0091] Also, even though the present invention has been
`described by way of references to boards of LEDs having a
`plurality of columnsandlines of LEDs, an assembly of LEDs
`accordingto the present invention including boards of LEDS
`having a single line of LEDs mounted thereon can also be
`provided.
`[0092] According to the present invention, boards of LEDs
`whereinthe tilt of each line or column of LEDs can indepen-
`dently be adjusted can also be provided.
`[0093] Even though the present
`invention has been
`described with reference to assembly of LEDs for a stree-
`tlight, an assembly of LEDs according to the present inven-
`tion can be used in any type of lights and for any lighting
`applications.
`[0094] Although the present invention has been described
`hereinabove by wayof preferred embodiments thereof, it can
`be modified without departing from the spirit and nature of
`the subject invention, as defined in the appended claims.
`
`1. (canceled)
`2. An assembly of light emitting diodes for a light com-
`prising:
`a first board having a first matrix of light emitting diodes
`(LEDs) mounted thereon defininga first light projection
`plane;
`a second board having a second matrix of LEDs mounted
`thereon defining a second light projection plane; said
`second board being mounted to said first board so as to
`define a first angle therebetween; whereinatleasta first
`LED from said first and second matrices of LEDs is
`
`tilted towardssaid respective first or second board so as
`to define a second angle therewith.
`3. An assembly as recited in claim 2, wherein at least a
`second LED from said first and second matrices of LEDs is
`tilted towards said respective first or second board so as to
`define a third angle therewith.
`4. An assembly as recited in claim 2, wherein each said
`LEDsofsaid first and second matrices of LEDsaretilted
`
`towardssaid respectivefirst and second boards soas to define
`
`Petitioner Ensign
`Exhibit 1031 - Page 19 of 20
`
`Petitioner Ensign
`Exhibit 1031 - Page 19 of 20
`
`

`

`US 2008/0212329 Al
`
`Sep. 4, 2008
`
`a second angle therewith; each said LEDsofsaid first matrix
`being generally oriented towards said second board; each said
`LEDsof said second matrix being generally oriented towards
`said first board.
`
`30. Anassemblyasrecited in claim 29, wherein said at least
`twodifferent types of LEDs are characterized by at least one
`of a colour, an angle of light pattern, and intensity.
`31. An assembly as recited in claim 29, wherein said dif-
`ferent types of LEDsare provided on a same oneofsaid at
`5. An assembly as recited in claim 4, wherein said first
`least said first and said second boards.
`angle is within a range between about 0 to 340 degrees and
`32. An assembly as recited in claim 2 fora streetlight.
`said second angle is within a range between about 20 to 90
`33. An assembly oflight emitting diodes for a light com-
`degrees.
`prising:
`6. An assembly asrecited in claim 4, wherein said LEDs
`at least one board including a plurality of light emitting
`from saidfirst matrix ofLEDsare further oriented alongafirst
`diodes (LEDs) mounted thereon; a first group of said
`direction; said LEDsfrom said second matrix of LEDsbeing
`plurality of LEDs being mountedto said board so as to
`further oriented along a seconddirection.
`define a first acute angle therewith; said first group of
`7. Anassembly as recited in claim 6, wherein said first and
`said plurality of LEDs defining a first light projection
`second directions share a commonthird direction;
`plane.
`whereby, in operation, said orientation of said LEDs along
`34. An assemblyas recited in