WO2013043743A1 - Appareil d'éclairage modernisé à diodes électroluminescentes - Google Patents

Appareil d'éclairage modernisé à diodes électroluminescentes Download PDF

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Publication number
WO2013043743A1
WO2013043743A1 PCT/US2012/056141 US2012056141W WO2013043743A1 WO 2013043743 A1 WO2013043743 A1 WO 2013043743A1 US 2012056141 W US2012056141 W US 2012056141W WO 2013043743 A1 WO2013043743 A1 WO 2013043743A1
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WO
WIPO (PCT)
Prior art keywords
preferential
lens
light
led
elongate
Prior art date
Application number
PCT/US2012/056141
Other languages
English (en)
Inventor
Kurt S. Wilcox
Mario A. Castillo
Original Assignee
Ruud Lighting, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ruud Lighting, Inc. filed Critical Ruud Lighting, Inc.
Publication of WO2013043743A1 publication Critical patent/WO2013043743A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/005—Arrays characterized by the distribution or form of lenses arranged along a single direction only, e.g. lenticular sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates generally to the field of lighting systems and, more particularly, to apparatus for utilizing LED light sources for illuminating areas with a predefined pattern of light intensity.
  • the present invention also relates to fixtures which utilize LED light sources in retrofitting old fixtures which previously used other non-LED types of light sources such as high-intensity discharge (HID) lamps.
  • HID high-intensity discharge
  • LEDs provide light sources which are energy efficient, and advances in LED technology provide even greater such efficiencies over time.
  • Some typical applications for lighting systems are roadway and parking lot lighting in which there are performance requirements such as the requirement that light be uniformly distributed over areas which are to be lighted while the neighboring regions are to be substantially free of light spillage.
  • High-luminance light fixtures using LEDs as light source for outdoor applications present particularly challenging problems.
  • High costs due to high complexity becomes a particularly difficult problem when high luminance, reliability, and durability are essential to product success.
  • the present invention provides an improved retrofit LED lighting fixture which may include LED lensing providing direction of a majority of light from a light emitter toward a preferential side.
  • the emitter may include a single light-emitting diode (LED) or a plurality of LEDs. Each emitter, regardless of the number of LEDs, as an axis.
  • Such emitters may include an LED package which has a primary lens over the LED(s).
  • the inventive lens is a secondary lens placed over the primary lens(es).
  • One embodiments of the lens according to the present invention has an emitter-adjacent base end defining a base plane and forming a light-receiving opening, a refracting inner surface which extends from the base end, a lateral surface positioned radially around the inner surface, and an output surface positioned to receive light from the inner end surface and from the lateral surface such that light exits the lens predominantly in the preferential direction.
  • the light-receiving opening is elongate across a preferential direction and is adapted to receive light from a group of light emitters aligned along the opening.
  • the refracting inner surface forms a void which may also be elongate across the preferential direction.
  • the void may be formed with a racetrack-shaped inner surrounding surface substantially orthogonal to the base plane and a substantially planar elongate inner end surface configured to direct light from the group of light emitters in the preferential direction.
  • the lateral surface is positioned for receiving light refracted by the racetrack-shaped inner surrounding surface for directing received light predominantly in the preferential direction
  • the lateral surface includes opposed preferential and non-preferential surface portions adjoined by opposed curved portions.
  • the non-preferential surface portion is at an angle to the base plane which is greater than an angle of the preferential surface portion to the base plane.
  • each lens is configured for directing light from the corresponding light emitter in a preferential-side off-axial direction with respect to the respective emitter axis.
  • each lens includes an emitter-adjacent base end forming an opening around the emitter axis and an inner surface extending from the opening.
  • the inner surface defines a void terminating with an end surface which is configured to direct light from the emitter toward the preferential side.
  • the end surface may have a substantially planar portion and may extend from the preferential side away from the base end and across from the preferential side.
  • Each lens also includes a lateral surface radially beyond the void and configured for directing light received from the inner surface toward the preferential side.
  • An output-end surface is positioned to receive light from the inner surface and from the lateral surface such light from the emitter exits the output-end surface predominantly toward the preferential side.
  • the lateral surface of each lens extends from the base end to terminate proximal to the output-end surface at distances from the emitter axis which are greater on the preferential side than on the non-preferential side.
  • LED lensing is a unitary lens comprising a plurality of lens members aligned substantially along a preferential/non-preferential line, each lens member being elongate across the preferential/non-preferential line with all elongate lens members being in substantially the same orientation.
  • preferential/non-preferential line means a line that extends through opposed preferential-side and non-preferential-side end points of the unitary lens.
  • preferential/non-preferential line would be substantially vertical with the preferential- side end point being at the bottom of the unitary LED lens.
  • LED light would be directed primarily outwardly and downwardly to increase illumination of ground areas along which these light fixtures are installed and to minimize wasteful uplight.
  • Some embodiments of such lensing include an emitter-adjacent base end defining a base plane and forming a light-receiving opening which is elongate across the preferential/non-preferential line and is adapted to receive light from a group of light emitters aligned along the opening.
  • a refracting inner surface forms a void which is elongate across the preferential/non-preferential line and has a racetrack- shaped surrounding surface extending from the base end substantially orthogonally to the base plane to terminate at a substantially planar elongate end surface configured to direct light from the emitters toward the preferential side.
  • a lateral surface is positioned for receiving light refracted by the racetrack-shaped inner surrounding surface and has opposed preferential and non-preferential surface portions, the non- preferential portion being at an angle to the base plane which is greater than the angle of the preferential portion to the base plane.
  • An output surface is positioned to receive light from the inner end surface and from the lateral surface such that light exits the lens member predominantly toward the preferential side, whereby light exits the unitary lens predominantly toward the preferential side.
  • the unitary lens has a substantially flat outer face substantially parallel to the base plane.
  • the aligned elongate lens members may be positioned with no more than a minimal gap therebetween.
  • the aligned elongate lens members are positioned such that the unitary lens has substantially continuous light emission across the group of aligned elongate lens members to form a substantially uninterrupted light field to an observer facing the unitary lens.
  • minimal gap means the shortest distance between the lens members along the preferential/non-preferential line, such distance being no greater than about one fifth of a greatest lens-member dimension along the
  • the minimal gap may range from about five millimeters in some embodiments with a smaller greatest lens-member dimension along the preferential/non-preferential line to about one millimeter in some other embodiments. In yet other embodiments, there may be substantially no gap between the lens members which have an outermost edge contacting the outermost edge of the adjacent lens member.
  • a certain aspect of the present invention involves an LED lighting apparatus which has a plurality of LED light sources spaced along an elongate mounting board, each LED light source including a group of LED emitters aligned substantially perpendicular to the mounting-board length.
  • Such LED apparatus includes a plurality of lens members in a line adjacent to one another and each positioned over a corresponding LED light source.
  • Each lens member is elongate in a direction substantially perpendicular to the line and directing light from its corresponding LED light source such that light from the plurality of LED light sources emanates substantially uniformly across the width and along the line of the lens members, thereby generating a substantially uniform luminance from the plurality of lens members .
  • the mounting board is substantially planar and the plurality of LED light sources have respective emission axes which are substantially parallel to one another and are substantially perpendicular to the mounting board.
  • the lens members direct light from the LED light sources in a primarily off-axial direction.
  • the mounting- board length extends between opposite preferential and non-preferential sides; and the lens members direct light from the LED light sources primarily toward the preferential side.
  • Each lens member may have a lens portion and a flange thereabout.
  • the flange portions of the plurality of lens members are molded together forming a unified flange portion with the lens portions extending therefrom.
  • Each lens portion may include an emitter-adjacent base end forming an opening around a corresponding emission axis.
  • An inner surface extends from the opening and defines a void terminating with an end surface.
  • the end surface extends from the preferential side away from the base end toward the non-preferential side which is across from the preferential side thereby directing light from the corresponding LED light source toward the preferential side.
  • a total internal reflection (TIR) surface is positioned radially beyond the void and directs light received from the inner surface toward the preferential side.
  • An outer output surface receives light from the inner end surface and the TIR surface, such light exiting the output surface predominantly toward the preferential side.
  • the lens-portion opening may be elongate in the direction substantially perpendicular to the line of the lens members.
  • the inner surface may include a surrounding lateral surface extending from the opening to the end surface substantially orthogonally to the base plane.
  • the end surface may be substantially planar and elongate in the direction substantially perpendicular to the line of the lens members.
  • the TIR surface extends from the emitter-adjacent base end to a racetrack-shaped edge distal from the base plane.
  • the distal edge has a substantially-straight edge portion on the preferential side.
  • the outer output surface is substantially planar.
  • the mounting board is substantially planar.
  • the outer output surface is substantially parallel to the mounting board.
  • the flange portion of each of the lens members has an outer surface coplanar with the outer output surface of the corresponding lens member.
  • the plurality of lens members are parts of a single lens piece with the flange portions of the plurality of lens members being molded together forming a unified flange portion of the single lens piece.
  • Such single lens piece has an outer wall which includes the outer output surfaces and the unified flange portion.
  • each LED light source includes at least one primary lens.
  • the corresponding lens member is a secondary lens placed over the at least one primary lens.
  • Each LED emitter may be an LED package having a primary lens over at least one LED.
  • FIGURE 1 is a perspective view showing an inventive LED configuration inside an old style globe-type lens for an "acorn" fixture.
  • FIGURE 2 is a perspective view of an inventive LED arrangement which includes the LED configuration of FIGURE 1.
  • FIGURE 3 is a perspective view of the inventive LED arrangement as in FIGURE 2 and including an LED heat sink positioned atop thereof and an LED driver secured below.
  • FIGURE 4 is a side view of the LED arrangement of FIGURE 3 positioned inside the "acorn" globe lens.
  • FIGURE 5 is a perspective view showing a luminance view of the retrofit LED light fixture incorporating the LED arrangement according to the present invention.
  • FIGURE 6 is a side view of an embodiment of the inventive LED lens.
  • FIGURE 7 is a perspective view of an exemplary embodiment an inventive unitary lens.
  • FIGURE 8 is a perspective view from above of the LED arrangement of FIGURE 2 with an intermediate refractor positioned over the unitary lens.
  • FIGURE 9 is another perspective view from above showing just the LED- supporting sleeve positioned within the intermediate refractor.
  • FIGURE 10 is a top view of the 3 -dimensional light distribution of the LED arrangement of FIGURES 2 and 3.
  • FIGURE 11 is a top view of the 3 -dimensional light distribution of a single LED arrangement which forms a 1/3 of the light distribution shown in FIGURE 10.
  • FIGURE 12 is a polar plot of the inventive assembled "acorn" retrofit LED light fixture.
  • FIGURE 13 is an iso plot of the inventive assembled "acorn” retrofit LED light fixture.
  • FIGURE 14 is a top view of the 3 -dimensional light distribution of the LED arrangement of FIGURES 2 and 3 inside an assembled "acorn" retrofit LED light fixture.
  • FIGURE 15 is a side view of the 3 -dimensional light distribution shown in FIGURE 14.
  • FIGURE 16 is a top perspective view of the LED arrangement as in FIGURE
  • FIGURE 17 is a bottom perspective view of the LED arrangement as in FIGURE 3.
  • FIGURE 18 is a side view opposite to the side view shown in FIGURE 4.
  • FIGURES 19-25 show assembly of the inventive LED arrangement.
  • FIGURE 26 is a top isoview of a single LED arrangement shown in FIGURE
  • FIGURE 27 is a side isoview of the single LED arrangement shown in
  • FIGURE 26 is a diagrammatic representation of FIGURE 26.
  • FIGURE 28 is a top view of the 3-dimensional light distribution of the LED arrangement of FIGURES 2 and 3.
  • FIGURE 29 is a side view of an "acorn" light fixture retrofitted with an LED arrangement according to the present invention.
  • FIGURE 30 is a horizontal cross-section view of the LED arrangement of FIGURE 16 with a ray trace of an embodiment of the elongate lens according to the present invention.
  • FIGURE 31 is a top view of the inventive LED arrangement and showing a side view of an embodiment of an elongate lens according to the present invention.
  • FIGURE 32 is a schematic side ray trace of the lens according to the present invention.
  • FIGURE 33 is an enlarged fragmentary cross-sectional view with a ray trace of an embodiment of the LED lighting apparatus according to the present invention.
  • FIGURE 34 is a further enlarged fragmentary cross-sectional view of a version of the embodiment of FIGURE 33.
  • FIGURE 35 is a schematic top ray trace of an embodiment of the lens according to the present invention.
  • FIGURE 36 is a front iso view showing preferential light distribution with minimized up light.
  • FIGURE 37 is a 3 -dimensional iso view showing preferential light distribution with minimized up light.
  • FIGURE 38 is a cross-sectional view of the LED arrangement shown in FIGURE 31.
  • FIGURE 39 is a preferential-side front perspective view of one embodiment of a single lens piece according to this invention.
  • FIGURE 40 is a back perspective view of the single lens piece of FIGURE 39.
  • FIGURE 41 is a front perspective view of the single lens piece of FIGURE 39 shown opaque.
  • FIGURE42 is a back perspective view of the single lens piece as in FIGURE
  • FIGURE 43 is a front elevation of the single lens piece of FIGURE 39.
  • FIGURE 44 is a back elevation of the single lens piece of FIGURE 39.
  • FIGURE 45 is a lateral view of the single lens piece of FIGURE 39.
  • FIGURE 46 is a side view of the single lens piece of FIGURE 39.
  • FIGURE 47 is a cross-sectional view of the single lens piece along a preferential/non-preferential line.
  • FIGURE 48 is a side cross-sectional view of the single lens piece taken across preferential/non-preferential line.
  • FIGURE 49 is a front elevation of the single lens piece of FIGURE 39 shown opaque.
  • FIGURE 50 is a back elevation of the single lens piece as in FIGURE 49.
  • FIGURE 51 is a lateral view of the single lens piece as shown in FIGURE 49.
  • FIGURE 52 is a side view of the single lens piece as shown in FIGURE 49.
  • FIGURE 53 is a cross-sectional view of the single lens piece, as shown in FIGURE 49, taken along a preferential/non-preferential line.
  • FIGURE 54 is a side cross-sectional view of the single lens piece, as shown in FIGURE 49, taken across preferential/non-preferential line.
  • FIGURE 55 is an enlarged perspective of an example of an LED package which has a single LED on a submount with a hemispheric primary lens overmolded over the LED.
  • FIGURE 56 is an enlarged side view of the LED package of FIGURE 55.
  • FIGURE 57 is an enlarged top view of the LED package of FIGURE 55.
  • FIGURE 58 is an enlarged top view of another exemplary LED package including an array of four LEDs on a submount and a hemispheric primary lens overmodled over the LED array such that the axis of the primary lens is offset from the axis of the LED array.
  • FIGURE 59 is an enlarged perspective view of yet another example of an LED package including an array of eight LEDs on a submount and an asymmetric primary lens overmolded over the LED array.
  • FIGURE 60 is an enlarged perspective view of another example of an LED package and including an array of forty-eight LEDs on a submount and an asymmetric primary lens overmolded over the LED array.
  • FIGURES 1-60 provides an improved LED lensing 10 that may be used for retrofit LED lighting fixture 50.
  • Illustrated embodiments of lensing 10 provide direction of a majority of light from a light source 60 toward a preferential side 11.
  • An example of light source 60 is seen in FIGURES 22-24 and 34.
  • Each LED light source 60 is shown to have a pair of LED emitters 61 each having an axis 62 seen in FIGURE 33.
  • Each illustrated LED emitter 61 is an LED package 63 having a primary lens 64 over at least one LED 65.
  • FIGURES 55-60 show examples of LED emitters that may be used with the present invention.
  • FIGURES 55-57 show LED package 63 A with single LED 65 on a submount 66 and hemispheric primary lens 64A coaxially overmolded on submount 66 over LED 65.
  • FIGURES 59 and 60 illustrate exemplary LED packages 63B and 63 C each including an array of LEDs on an LED-populated area which has an aspect ratio greater than 1 , and primary lens 64 being overmolded on the submount 66 over the LED-populated area. It is seen in FIGURE 60 that the array may include LEDs emitting different-wavelength light of different colors such as including red LEDs along with light green or other colors to achieve natural white light.
  • Light emitters of the type as LED packages 63B and 63C are described in detail in Application Serial No. 13/441,558, filed on April 6, 2012, and in Application Serial No. 13/441,620, filed on April 6, 2012. Contents of both applications are incorporated herein by reference in their entirety.
  • FIGURES 58-60 illustrate versions of LED light emitter 61 configured to refract LED-emitted light toward the preferential side.
  • each LED array defines emitter axis 62.
  • FIGURES 59 and 60 illustrate primary lens configured to refract LED-emitted light toward preferential side 11.
  • FIGURE 58 shows a hemispheric primary lens 64 having a centerline 67 offset from emitter axis 61. It should be understood that for higher efficiency LED emitter 61 may include a primary lens having both its centerline offset from the emitter axis and also being shaped for refraction of LED-emitted light toward preferential side 11.
  • primary lens 64 is shown asymmetric.
  • FIGURES 24, 30, 33, 34 and 38 best illustrate LED lighting apparatus 100 which has a plurality of LED light sources 60 spaced along an elongate mounting board 12, each LED light source 60 including a group of LED emitters 61 aligned substantially perpendicular to the mounting-board length 13.
  • FIGURES 2 and 24 illustrate LED apparatus 100 which includes a plurality of secondary lens members 20 in a line along a preferential/non-preferential line 2, lenses 20 being adjacent to one another and each positioned over primary lens(es) 64 of the corresponding LED light source 60.
  • each lens member 20 is elongate in a direction substantially perpendicular to line 2.
  • FIGURES 5 and 33 best illustrate lens members 20 directing light from its corresponding LED light source 60 such that light from the plurality of LED light sources 60 emanates substantially uniformly across the width of the lens members and along line 2, thereby generating a substantially uniform luminance from the plurality of lens members 20.
  • FIGURES 22-24 show mounting board 12 substantially planar and FIGURE 33 illustrates the plurality of LED light sources 60 having respective emission axes 61 which are substantially parallel to one another and are substantially perpendicular to the mounting board 12.
  • FIGURES 22-24 further show mounting-board length 13 extending between preferential side 11 and an opposed non-preferential side 14.
  • FIGURE 33 further shows lens members 20 directing light from LED light sources 60 in a primarily off-axial direction and primarily toward preferential side 11.
  • FIGURE 44 shows each lens member 20 having a lens portion 21 and a flange portion 22 thereabout.
  • FIGURES 2, 33 and 39-54 illustrate flange portions 22 of the plurality of lens members 20 molded together forming a unified flange portion 220 with lens portions 22 extending therefrom.
  • FIGURES 34, 45-48, 53 and 54 show each lens portion 21 including an emitter-adjacent base end 24 which defines a base plane 25 and forms an opening 26 around a corresponding emission axis 61. These FIGURES further show an inner surface 30 extending from opening 26 and defining a void 27 terminating with an end surface 31.
  • FIGURES 34 and 54 best illustrate end surface 31 extending from preferential side 11 away from base end 24 toward non-preferential side 14 which is across from preferential side 11 such that end surface 31 directs light from the corresponding LED light source 60 toward preferential side 11 , as seen in FIGURE 33.
  • FIGURE 54 shows end surface 31 extending at a 25 ° angle with respect to base plane 25.
  • FIGURES 34, 39, 48, 53 and 54 also show inner surface 30 including a surrounding lateral surface 32 extending from opening 26 to end surface 31 substantially orthogonally to base plane 25.
  • the inner surrounding surface 32 may have a slight inward angle of about 5 ° toward emitter axis 62 from being fully orthogonal with respect to base plane 25.
  • FIGURES 34, 38-40, 42-48 and 54 further best show a total internal reflection (TIR) surface 40 (also referred to herein as a lateral surface) positioned radially beyond void 27.
  • TIR total internal reflection
  • FIGURES 30 and 33 show TIR surface 40 receiving light from inner surface 30.
  • FIGURE 33 further shows TIR surface 40 directing such light toward preferential side 11.
  • FIGURES 48 and 54 show lateral surface 40 having a base- adjacent region 46 which extends from base 24 substantially orthogonally with a slight outward angle of about 5 ° away from emitter axis 61 from being fully orthogonal with respect to base plane 25, as seen in FIGURE 54.
  • FIGURES 40 and 42 show lateral surface 40 including opposed preferential and non-preferential surface portions 43 and 44 adjoined by opposed curved portions 45.
  • FIGURES 48 and 54 show opposed preferential and non-preferential surface portions 43 and 44 and curved portions 45 extending outwardly from base-adjacent region 46 to distal edge 41.
  • FIGURES 33, 34, 47 and 54 illustrate non-preferential surface portion 44 being at an angle to base plane 25 which is greater than an angle of preferential surface portion 43 to the base plane 25.
  • an outer output surface 28 receives light from inner end surface 31 and from TIR surface 40. Such light exiting output surface 28 predominantly toward preferential side 11.
  • FIGURES 40-44, 42-44 and 48 best illustrate lens-portion opening 26 being elongate in the direction substantially perpendicular to line 2 of lens members 20 and being adapted to receive light from a group of light emitters 61 aligned along opening 26.
  • FIGURES 34, 53 and 54 best show end surface 31 being substantially planar and elongate in the direction substantially perpendicular to line 2 and surrounding surface 32 having a racetrack shape.
  • Refracting inner surface 30 forms void 27 which is also shown elongate across a preferential direction.
  • Void 27 is shown formed with racetrack-shaped inner surrounding surface 32 substantially orthogonal to base plane 25 and substantially planar elongate inner end surface 31 configured to direct light from the group of light emitters 61 in the preferential direction.
  • Lateral surface 40 is shown positioned for receiving light refracted by racetrack-shaped inner surrounding surface 32 for directing received light predominantly in the preferential direction.
  • FIGURES 39, 40 and 42-44 illustrate TIR surface 40 extending from emitter- adjacent base end 24 to racetrack-shaped edge 41 distal from base plane 25.
  • FIGURES 44 and 50 show distal edge 41 having a substantially-straight edge portion 42 on non-preferential side 14.
  • FIGURES 47 and 48 best show outer output surface 28 being substantially planar.
  • FIGURES 30, 31 and 38 best show outer output surface 28 being substantially parallel to substantially-planar mounting board 12.
  • FIGURES 45-48 and 53 and 54 illustrate flange portions 22 of each of lens members 20 having an outer surface 29 coplanar with outer output surface 28 of the corresponding lens member 20.
  • FIGURES 39-54 illustrate the plurality of lens members 20 being parts of a single lens piece 200 with flange portions 22 of the plurality of lens members 20 being molded together forming unified flange portion 220 of single lens piece 200.
  • FIGURES 48 and 54 further illustrate single lens piece 200 having an outer wall 23 which includes outer output surfaces 28 and unified flange portion 220.
  • Single lens piece 200 also referred to herein as a unitary lens, has a substantially flat outer face 230 substantially parallel to base plane 25.
  • FIGURE 48 shows lateral portions 17 extending laterally from flange portions 22 along curves which are parts of a circular cylinder with an axis of revolution being parallel to preferential/non-preferential line 2.
  • Flange portions 22 of each lens member 22 and unified flange portion 220 of single lens piece 200 each have an inner face 35 extending from TIR surface 40.
  • inner face 35 may include matte finish to diffuse light which escapes TIR surface and to provide further "glow" effect further enhancing the substantially uniform luminance.
  • FIGURES 2, 7, 33, 39, 40, 42-45, 47, 50 and 54 show aligned elongate lens members 20 positioned with a minimal gap 15 therebetween such that unitary lens 200 has substantially continuous light emission across the group of aligned elongate lens members 20 to form a substantially uninterrupted light field to an observer facing unitary lens, as illustrated in FIGURES 5 and 33.
  • FIGURES 2 and 7 show minimal gap being about one fifth of a greatest lens-member dimension along preferential/non- preferential line 2.
  • FIGURES 33, 39, 40, 42-45, 47, 50 and 54 illustrate substantially no gap between lens members 20 which have an outermost edge 16 contacting outermost edge 16 of adjacent lens member 20.
  • Another aspect of this invention may be useful for retrofit LED light fixtures 50, which by using a plurality of LED emitters and utilizing LED lensing 10, substantially imitate appearance of a single light source such as an HID light bulb, as shown in FIGURE 5.
  • FIGURES 1 and 29 illustrate an LED arrangement 51 which includes apparatus 100 positioned inside an old style globe-type lens 53 for an "acorn" fixture.
  • FIGURES 2, 3, 8 and 9 show that LED arrangement 51 includes three LED-array modules 52 positioned with respect to each other to form a substantially closed shape which imitates a single non-LED light source such as an HID light bulb.
  • LED arrangement 51 is in substantially same position within globe lens 53 as would previously be taken by a non-LED light source.
  • Schematic light distribution of "acorn" retrofit LED light fixture including LED arrangement 51 is illustrated in FIGURES 10-14 and 28.
  • FIGURE 2 further illustrates LED arrangement 51 which which includes an LED-supporting sleeve 54 secured to a mounting post 55 which is inserted inside an existing light socket.
  • FIGURES 8 and 31 best show LED-supporting sleeve 54 having three substantially planar sides 540 each supporting one of LED-array modules 52.
  • FIGURE 2 further shows unitary lens 200 positioned over each LED-array module 52.
  • FIGURES 22-24 illustrate examples of LED array module 52 having five pairs of LEDs on mounting board 12.
  • Each LED-array module 52 is secured to one side of LED-supporting sleeve 54 with a permanent heat-conductive adhesive and screws which provide preliminary alignment of LED module with preferential-non- preferential line 2.
  • Different-power LEDs (as shown in FIGURE 23) may be used for various light intensity, as may be desired in various fixture applications.
  • FIGURES 26 and 27 show isoviews of a single LED arrangement 51.
  • FIGURE 3 shows LED arrangement 51 also including an LED heat sink 56 positioned atop LED-supporting sleeve 54 to facilitate heat dissipation from LEDs 61 through LED-supporting sleeve 54.
  • FIGURES 3, 16 and 17 also show an LED driver 57 is secured at a lower end of mounting post 55.
  • FIGURES 19-25 show assembly of LED arrangement 51.
  • FIGURES 8 and 9 show one version of LED arrangement 51 including an intermediate refractor 58 positioned over unitary lenses 200 to further blend emitted light for enhancement of a single-light source appearance.
  • Intermediate refractor 58 is particularly useful when outer globe lens 53 is substantially transparent with little or no refractive surface texturing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention se rapporte à une lentille unitaire (200) qui comprend une pluralité d'éléments de lentille (20) alignés sensiblement le long d'une ligne préférentielle/non préférentielle (2). Chaque élément de lentille est allongé d'un côté à l'autre de la ligne préférentielle/non préférentielle, tous les éléments de lentille allongés se trouvant dans une orientation sensiblement identique et chaque élément de lentille étant configuré pour que la lumière sorte de la lentille unitaire principalement vers le côté préférentiel (11). Chaque élément de lentille comprend une ouverture allongée (26) destinée à recevoir la lumière provenant d'un groupe d'émetteurs (61) alignés d'un côté à l'autre de la préférentielle/non préférentielle (2) ; une surface interne de réfraction (30) qui forme un vide (27) et qui présente une surface environnante en forme de champ de course (32) qui s'étend depuis l'ouverture (26) jusqu'à une surface d'extrémité allongée sensiblement plate (31) ; et une surface latérale (40) qui présente des parties de surface préférentielle et non préférentielle opposées (43 et 44), la partie non préférentielle (44) formant un angle avec le plan de base (25) qui est plus important que l'angle formé par la partie préférentielle (43) et le plan de base (25).
PCT/US2012/056141 2011-09-19 2012-09-19 Appareil d'éclairage modernisé à diodes électroluminescentes WO2013043743A1 (fr)

Applications Claiming Priority (2)

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US201161536560P 2011-09-19 2011-09-19
US61/536,560 2011-09-19

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WO2013043743A1 true WO2013043743A1 (fr) 2013-03-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10655790B2 (en) 2014-01-30 2020-05-19 Signify Holding B.V. Lighting device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020191386A1 (en) * 2001-01-31 2002-12-19 Cleaver Mark Joseph Illumination device for simulation of neon lighting
US20100039810A1 (en) * 2008-08-14 2010-02-18 Cooper Technologies Company LED Devices for Offset Wide Beam Generation
US20100110660A1 (en) * 2008-11-06 2010-05-06 Thomas John Brukilacchio Light emitting diode emergency lighting module
US20100165625A1 (en) * 2006-02-27 2010-07-01 Illumination Management Solutions Inc. Led device for wide beam generation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020191386A1 (en) * 2001-01-31 2002-12-19 Cleaver Mark Joseph Illumination device for simulation of neon lighting
US20100165625A1 (en) * 2006-02-27 2010-07-01 Illumination Management Solutions Inc. Led device for wide beam generation
US20100039810A1 (en) * 2008-08-14 2010-02-18 Cooper Technologies Company LED Devices for Offset Wide Beam Generation
US20100110660A1 (en) * 2008-11-06 2010-05-06 Thomas John Brukilacchio Light emitting diode emergency lighting module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10655790B2 (en) 2014-01-30 2020-05-19 Signify Holding B.V. Lighting device

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