EP3317582A2 - Dispositifs d'éclairage destinés à réduire l'éblouissement provoqué par des diodes électroluminescentes (del) - Google Patents

Dispositifs d'éclairage destinés à réduire l'éblouissement provoqué par des diodes électroluminescentes (del)

Info

Publication number
EP3317582A2
EP3317582A2 EP16814781.7A EP16814781A EP3317582A2 EP 3317582 A2 EP3317582 A2 EP 3317582A2 EP 16814781 A EP16814781 A EP 16814781A EP 3317582 A2 EP3317582 A2 EP 3317582A2
Authority
EP
European Patent Office
Prior art keywords
lighting device
led
light
tir
based lighting
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP16814781.7A
Other languages
German (de)
English (en)
Other versions
EP3317582A4 (fr
Inventor
Wen Chin Chen
Boon Kheng Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IQ Group Sdn Bhd
Original Assignee
IQ Group Sdn Bhd
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 IQ Group Sdn Bhd filed Critical IQ Group Sdn Bhd
Publication of EP3317582A2 publication Critical patent/EP3317582A2/fr
Publication of EP3317582A4 publication Critical patent/EP3317582A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F21Y2105/14—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array
    • F21Y2105/16—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the overall shape of the two-dimensional array square or rectangular, e.g. for light panels
    • 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

  • Embodiments of the present invention relate to optical device technologies, and more particularly, to lighting devices which reduce glare from light emitting diodes (LEDs). Description of the Related Art
  • incandescent bulbs have been considered as a high quality light source generating a light with a spectrum close to the spectrum of black body radiator. Although, the incandescent bulbs have good colour rendering properties they use a considerable amount of energy when compared to the generated visible light. This results in a corresponding large outlet of carbon dioxide.
  • compact fluorescent light bulbs have been proposed as an alternative in recent past.
  • the spectrum of the light generated by compact fluorescent light bulbs differs significantly from that of black body radiators and incandescent bulbs. Consequently the colour rendering properties of the light is low. Therefore, light- emitting diode technology has been developed to replace the common light bulbs and the compact fluorescent light bulbs.
  • LED-based devices using the technology of light emitting diodes have the potential to generate high quality light having a spectrum close to that of black body radiators, while using only a small amount of energy as compared to the generated visible light.
  • LED-based devices and systems can be designed with a view to produce light with one or more desired spectral properties, depending on the proposed application of the technology.
  • Another advantage of LED based devices are that they produce a very limited amount of heat radiation. Consequently, LED based devices can be utilized in places where the subject to be illuminated is heat sensitive, such as special grocery based products or any kind of specimen which is to be preserved.
  • LED based devices and apparatuses are environmentally friendly and have a big potential in energy saving and long operation life in comparison with traditional lighting devices available in the past.
  • One of the performance criteria for LED illumination apparatuses is light output uniformity. For example, it is desired that the light output for an LED illumination apparatus maintain relatively uniform colour and brightness throughout different areas of the LED illumination apparatus.
  • most of the existing LED light based devices and apparatuses suffer from one or more shortcomings of poor light output uniformity.
  • a number of discrete LED devices are used which may lead to relatively small Lambertian source which is commonly known as light output hot spots with high intensity at the centre.
  • LED illumination apparatuses may produce a light output that is not uniform but includes a plurality of intensely lit regions surrounded by dimmer regions, which may cause discomfort for e.g., glare for a human eye.
  • the LED hot spot or direct glare could cause visual discomfort or more severe case of temporary blindness if the person is exposed to high brightness lumination.
  • presently available methods of addressing these issues may lead to expensive fabrication costs. In many cases the fabrication time period to manufacture these types of LEDs based devices and apparatuses are time consuming to the manufacturer.
  • Embodiments of the present disclosure generally, disclose a lighting device for reducing glare from light emitting diodes (LED).
  • the lighting device includes at least one LED light source, which includes an optical axis, a housing encompassing the LED light source for capturing light emitted from the LED light source during operation of the lighting device, a first total internal reflection (TIR) surface is positioned within the housing in front of the LED light source for receiving light from the LED lighting source, and a second TIR surface is positioned within the housing lateral to the first TIR surface for receiving light from the TIR first surface.
  • the LED light source operates without any reflective coating.
  • the present invention provides an optical device which is designed to reflect, redirect and expand light beam in the same embodiment without any reflective coating.
  • the present invention utilizes a total internal reflection (TIR) structure to control light direction.
  • TIR total internal reflection
  • the lighting device is designed to control a single LED which can be multiplied in any number and joined together into a cluster.
  • the present invention provides a lighting device with indirect illumination. Specifically, this embodiment provides a larger emission area and subsequently reduce glare. Further, the first total internal reflection (TIR) surface shields the direct glare.
  • TIR total internal reflection
  • the first total internal reflection (TIR) surface and the second total internal reflection (TIR) surface creates longer travelled path. Consequently, this creates beam expansion or larger emission area therefore reduces luminance (Intensity/emission area) which further reduces the glare.
  • Non-air gap embodiment eliminates Fresnel loss and hence provides better light output. Moreover, the first total internal reflection (TIR) surface and the second total internal reflection (TIR) surface create high light output efficiency.
  • At least one contour or a plurality of combination of contours of the first surface is selected based on a total internal reflection (TIR) condition where a critical angle exceeds a plurality of incoming rays on an interface of higher refractive index material to low refractive index material.
  • TIR total internal reflection
  • At least one contour or a plurality of combination of contours of the first surface is selected from a group comprising a spherical profile or a non-spherical profile and wherein said non-spherical profile is selected from a group comprising a parabolic, a hyperbolic, and an ellipsoid contour.
  • At least one contour or a plurality of combination of contours of said second surface is selected from a spherical profile and a non-spherical profile and wherein said at least one contour or said plurality of combination of contours are selected based on a total internal reflection (TIR) condition.
  • TIR total internal reflection
  • Fig. 1 illustrates a diagram of principle of operation of the lighting device, in accordance with one embodiment of the present invention
  • Fig. 2A illustrates a pictorial representation of the spherical profile, and non-spherical profile contour of a first surface of a total internal reflection (TIR), in accordance with one embodiment of the present invention
  • Fig. 2B illustrates a pictorial representation of the spherical, and non- spherical profile of a second surface of the total internal reflection (TIR), in accordance with one embodiment of the present invention
  • Fig. 3 illustrates a pictorial representation of the second surface of different surface curvature of the total internal reflection (TIR), in accordance with one embodiment of the present invention
  • Fig. 4 illustrates a pictorial representation of a light control governed by the total internal reflection (TIR), in accordance with one embodiment of the present invention
  • Fig. 5 illustrates a pictorial representation of a light diffusing structure including organized micro structure elements, in accordance with one embodiment of the present invention
  • Fig. 6A illustrates an exploded view of a square output facet of the light output surface, in accordance with one embodiment of the present invention
  • Fig. 6B illustrates a perspective view of a light output surface, in accordance with one embodiment of the present invention
  • Fig. 7 illustrates a pictorial representation of the lighting device with a design to control over an array of LEDs, in accordance with one embodiment of the present invention
  • Fig. 8 illustrates a top view pictorial representation of the lighting device joined into a cluster, in accordance with one embodiment of the present invention
  • Fig. 9 illustrates a pictorial representation of the lighting device wherein there is no air gap between LED and lens, in accordance with another embodiment of the present invention
  • Fig. 10 A illustrates a pictorial representation of the side view of common lens for multiple LEDs in array or cluster formation in an air gap solution, in accordance with yet another embodiment of the present invention
  • Fig. 10 B illustrates a pictorial representation of the perspective view of common lens for multiple LEDs in array or cluster formation in an air gap solution, in accordance with yet another embodiment of the present invention
  • Fig. 11 A illustrates a pictorial representation of the front view of the multiple TIR lens blend into common lens for multiple LEDs in array or cluster formation, in accordance with yet another embodiment of the present invention
  • Fig. 1 1 B illustrates a pictorial representation of the prospective view of the multiple TIR lens blend into common lens for multiple LEDs in array or cluster formation, in accordance with yet another embodiment of the present invention.
  • Fig. 12 illustrates a pictorial representation of the side view of common lens for multiple LEDs in array or cluster formation in a non-air gap solution, in accordance with yet another embodiment of the present invention
  • Various embodiments of the present invention relates to lighting devices for reducing glare from the light emitting diodes (LEDs).
  • the present invention provides the lighting device that has been designed to reflect, to redirect and to expand light beam in the same embodiment without any reflective coating.
  • the present lighting devices are utilizing total internal reflection (TIR) structure to control the light direction from the light emitting diode (LED).
  • TIR total internal reflection
  • the present lighting device provides the advantage of shaping the light source and thereby controlling the glare in the same embodiment.
  • Fig.1 illustrates a diagram of principle of operation of the lighting device, in accordance with one embodiment of the present invention.
  • the present optical device 100 utilizes a Total Internal Reflection (TIR) structure to shield away LED hotspot or direct glare generated by the optical device 100.
  • TIR Total Internal Reflection
  • the Total internal reflection (TIR) is a phenomenon that happens when a propagating light strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface.
  • the Total internal reflection (TIR) can only occur when light in a medium with a higher refractive index hits the surface that is in contact with a medium of lower refractive index.
  • the critical angle for polycarbonate with refractive index of 1.585 to air is 39 degree.
  • the Total Internal Reflection (TIR) structure is positioned on top of the LED 101 , to redirect the light beam which eventually expands the light beam. Consequently, the light beam then radiates as a larger emission area by means of diffuse or specular surface through the process of reflection or transmission mode. In use, the expansion of emission area lowers the luminance value as stated in formula 1 below which will directly reduce the glare as stated in formula 2 to the human eyes.
  • Luminance (nits) Intensity of light source (cd) / Emission area (m A 2)
  • the contour of the Total Internal Reflection (TIR) structure is a radially V-cut which is mounted on top of the LED. Particularly, in FIG.1 the V- cut is on the first Total Internal Reflection (TIR) surface 105. Further, as the light reflected from a first Total Internal Reflection (TIR) surface 105 is subsequently reflected again on a second Total Internal Reflection (TIR) surface 110 towards the light output facet 115 as illustrated in FIG. 1 , in accordance with an embodiment of the present invention. Moreover, the beam expansion takes place when light hits on the second Total Internal Reflection (TIR) surface 1 10. This phenomena takes place because the path of the light travelled is longer.
  • the contour of the optical piece of the present invention can be of a different shape other than "V" contour of the optical piece and is not limited to "V" contour.
  • any other contour of the optical piece can be utilized for the present invention as long as the particular contour of the optical piece is able to meet theTotal Internal Reflection (TIR) condition.
  • TIR Total Internal Reflection
  • the condition implies that the critical angle exceeds for the incoming rays on the interface of higher refractive index material to low refractive index material for e.g. Polycarbonate to air.
  • Fig. 2A illustrates a pictorial representation 200 of the spherical profile, and non-spherical profile contour of the first surface 105 of the total internal reflection, in accordance with another embodiment of the present invention.
  • one or more contours of the optical lighting device 100 that meet the Total Internal Reflection (TIR) condition includes spherical profile and non- spherical profile such as parabolic, hyperbolic, and ellipsoid provided that it meets the Total Internal Reflection (TIR) condition which relates to lens material and in-coming angle rays.
  • TIR Total Internal Reflection
  • the Total Internal Reflection (TIR) within the same optical embodiment eliminates the light loss from one media to another which is also known as Fresnel loss.
  • the light diffusing or light manipulating structure can be built upon the Total Internal Reflection (TIR) surfaces or light emission surfaces to enhance the control of beam shaping and visual impression.
  • the surface of the Total Internal Reflection (TIR) can be divided into segmented profile with each of the profile directing and controlling the light rays in certain direction to achieve desired light pattern and beam angle.
  • the light diffusing structure can be built upon the Total Internal Reflection (TIR) surfaces.
  • TIR Total Internal Reflection
  • the light diffusing is more of averaging or scattering light into random direction so that smearing effect is there to provide uniform appearance.
  • the light diffusing structure can consist of organized micro structure elements or randomized surface texturing, which provides light smearing effects.
  • the surface finish of the light diffusing structure can be of a glossy finish or a non-glossy finish.
  • Fig. 2B illustrates a pictorial representation250 of the spherical, and non- spherical profile of a second surface 110 of the total internal reflection (TIR), in accordance with one embodiment of the present invention.
  • the second surface 110 of the total internal reflection (TIR) is able to reflect and manipulate light into a desired direction and pattern.
  • the second surface 110 of the total internal reflection (TIR) in the same embodiment is used to collect the side light from the LED to the output facets 115. Consequently, the second surface 110 enhances the light output by directing light in a same medium in a controlled manner instead of side light being bounced around and lost.
  • Fig.3 illustrates a pictorial representation 300 of the second surface 110 of different surface curvature of the total internal reflection (TIR), in accordance with one embodiment of the present invention.
  • TIR total internal reflection
  • the structure of different surface curvature or gradient alters the light output direction.
  • the beam shaping or the light control is governed by the total internal reflection (TIR) surface and it's curvature as illustrated in the Fig.3.
  • Fig. 4 illustrates a pictorial representation 400 of a light control governed by the total internal reflection (TIR)
  • Fig. 5 illustrates a pictorial representation of a light diffusing structure 500 including organized micro structure elements, in accordance with one embodiment of the present invention.
  • TIR total internal reflection
  • the macro level of the light manipulating structure is selected from a group including a spherical surface, non-spherical surface, prismatic, wedge, triangular surfaces, fresnel, and segmented surface.
  • the non-spherical surface includes parabolic, hyperbolic, and ellipse surface.
  • the micro level of the light manipulating structure is selected from a group including etching texturing, sand-blasting texturing and diffractive surfaces.
  • Fig. 6A illustrates an exploded view of a square output facet of the light output surface
  • Fig. 6B illustrates a perspective view of thelight output surface, in accordance with one embodiment of the present invention.
  • the facet contour is selected from a group of round, square, rectangular or other polygon format.
  • Fig. 7 illustrates a pictorial representation 700 of the lighting device with a design to control over an array of LEDs
  • Fig. 8 illustrates a pictorial representation 850 of the lighting device joined into a cluster in accordance with one embodiment of the present invention.
  • the lighting device 100 has a design to control over a single LED and that can be multiplied in any number and joined into a cluster as illustrated in Fig. 8.
  • Fig. 7 further illustrates a sectional view A-A 700 of the lighting device 100.
  • Fig. 9 illustrates a pictorial representation of the lighting device 900, wherein there is no air gap between LED and lens, in accordance with another embodiment of the present invention.
  • the present invention provides the lighting device 900 with indirect illumination. Specifically, this embodiment provides a larger emission area and subsequently reduce glare. Further, the first total internal reflection (TIR) surface 105 shields the direct glare. In accordance with another embodiment of the present invention, the first total internal reflection (TIR) surface 105 and the second total internal reflection (TIR) surface 110 creates longer travelled path. Consequently, this creates beam expansion or larger emission area therefore reduces luminance (Intensity/emission area) which further reduces the glare.
  • TIR total internal reflection
  • the main purpose of the present device is that there is no glare and therefore no hot spot.
  • the users utilizing the device will not be able to see the light source directly which provides the glare.
  • the beam from the light source is reflected off the two surfaces which includes the first Total Internal Reflection (TIR) surface 105 and the second Total Internal Reflection (TIR) surface 1 10 before going out. This process is called indirect illumination. Since, the first TIR surface 105 and the second TIR surface 1 10 are the Total Internal Reflection surfaces there is no light loss during reflection. Therefore the present design is very efficient.
  • the beam gets reflected from the surface 105 to the surface 110, and subsequently the beam expands. Similarly when the beam gets reflected from the surface 1 10 and goes out, the beam further expands. Moreover, when the beam expands it reduces luminance that is intensity per emission area which further reduces the glare.
  • Non-air gap embodiment eliminates Fresnel loss and hence provides better light output. Moreover, the first total internal reflection (TIR) surface 105 and the second total internal reflection (TIR) surface 1 10 create high light output efficiency.
  • Fig. 10 A illustrates a pictorial representation of the side view of common lens for multiple LEDs in array or cluster formation in an air gap solution
  • Fig. 10 B illustrates a pictorial representation of the perspective view of common lens for multiple LEDs in array or cluster formation in an air gap solution, in accordance with yet another embodiment of the present invention.
  • Fig. 11 A illustrates a pictorial representation of the front view of the multiple TIR lens blend into common lens for multiple LEDs in array or cluster formation
  • Fig. 11 B illustrates a pictorial representation of the perspective view of the multiple TIR lens blend into common lens for multiple LEDs in array or cluster formation, in accordance with yet another embodiment of the present invention
  • Fig. 12 illustrates a pictorial representation of the side view of the common lens for multiple LEDs in array or cluster formation in a non-air gap solution, in accordance with yet another embodiment of the present invention.
  • the present invention provides lighting devices in which the contour of the light rays and glare is controlled simultaneously.
  • the present invention provides the lighting device with a design to control over a single LED which can be multiplied in any number. Moreover, it can be joined into a cluster.
  • the lighting device can be utilized for many purposes for example the lighting device can be extended to cover an area for decorative illumination purpose.
  • the present lighting device can act as a light emission window or an external cover. It is economical to manufacture because the design is simple and subsequently it eliminates the cost of reflective coating. Particularly, the contouring of light rays and glare control is handled in the same embodiment. Moreover, in one or more embodiments light diffusing or light manipulating structures could be built upon the total internal reflection (TIR) surfaces or light emission surfaces to enhance the control of beam shaping and visual impression.
  • TIR total internal reflection

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

La présente invention concerne un dispositif d'éclairage permettant de réduire l'éblouissement provoqué par des diodes électroluminescentes (DEL), ledit dispositif d'éclairage comprenant au moins une source de lumière à DEL comprenant un axe optique, un boîtier entourant la source de lumière à DEL pour capturer la lumière émise à partir de la source de lumière à DEL pendant le fonctionnement du dispositif d'éclairage, une première surface positionnée à l'intérieur dudit boîtier devant la source de lumière à DEL pour recevoir la lumière provenant du dispositif d'éclairage à base de DEL, et une seconde surface positionnée à l'intérieur du boîtier de façon latérale par rapport à la première surface pour recevoir la lumière provenant de la première surface, et une surface de sortie pour recevoir la lumière provenant de ladite seconde surface. En particulier, la source de lumière à DEL fonctionne sans aucun revêtement réfléchissant.
EP16814781.7A 2015-06-20 2016-06-20 Dispositifs d'éclairage destinés à réduire l'éblouissement provoqué par des diodes électroluminescentes (del) Withdrawn EP3317582A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI2015702099A MY193363A (en) 2015-06-20 2015-06-20 Lighting devices to reduce glare from light emitting diodes (leds)
PCT/MY2016/000034 WO2016209068A2 (fr) 2015-06-20 2016-06-20 Dispositifs d'éclairage destinés à réduire l'éblouissement provoqué par des diodes électroluminescentes (del)

Publications (2)

Publication Number Publication Date
EP3317582A2 true EP3317582A2 (fr) 2018-05-09
EP3317582A4 EP3317582A4 (fr) 2019-02-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16814781.7A Withdrawn EP3317582A4 (fr) 2015-06-20 2016-06-20 Dispositifs d'éclairage destinés à réduire l'éblouissement provoqué par des diodes électroluminescentes (del)

Country Status (3)

Country Link
EP (1) EP3317582A4 (fr)
MY (1) MY193363A (fr)
WO (1) WO2016209068A2 (fr)

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
US11333334B2 (en) 2018-01-29 2022-05-17 Heathco Llc Rotatable light fixture secured to a junction box via a base
US11346514B2 (en) 2020-09-14 2022-05-31 Heathco Llc Rotationally adjustable outdoor security light
US11300258B2 (en) 2020-09-14 2022-04-12 Heathco Llc Rotationally adjustable outdoor security light
US11280458B1 (en) 2020-09-14 2022-03-22 Heathco Llc Mechanical and electrical interface for security light mounting

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KR101389347B1 (ko) * 2008-11-04 2014-04-29 삼성전자주식회사 Ｌｅｄ 패키지
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US9235054B2 (en) * 2012-12-12 2016-01-12 Ledil Oy Optical surface, lens and reflector
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Also Published As

Publication number Publication date
EP3317582A4 (fr) 2019-02-27
WO2016209068A3 (fr) 2017-02-09
MY193363A (en) 2022-10-06
WO2016209068A2 (fr) 2016-12-29

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