WO2013028972A1 - Eclairage par conduits de lumière à lumière brillante à del - Google Patents

Eclairage par conduits de lumière à lumière brillante à del Download PDF

Info

Publication number
WO2013028972A1
WO2013028972A1 PCT/US2012/052268 US2012052268W WO2013028972A1 WO 2013028972 A1 WO2013028972 A1 WO 2013028972A1 US 2012052268 W US2012052268 W US 2012052268W WO 2013028972 A1 WO2013028972 A1 WO 2013028972A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
pump assembly
led
lighting fixture
fixture according
Prior art date
Application number
PCT/US2012/052268
Other languages
English (en)
Inventor
Robert D. Battis
Wayne Armstrong
John N. Magno
Original Assignee
Laser Energetics, 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 Laser Energetics, Inc. filed Critical Laser Energetics, Inc.
Publication of WO2013028972A1 publication Critical patent/WO2013028972A1/fr

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0096Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068Arrangements of plural sources, e.g. multi-colour light sources
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/007Incandescent lamp or gas discharge lamp
    • G02B6/0071Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073Light emitting diode [LED]
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085Means for removing heat created by the light source from the package

Definitions

  • This invention generally relates to a light emitting diodes ("LEDs”), and more particularly to providing an high efficiency LEDs in a design that can replace conventional lighting fixtures.
  • LEDs light emitting diodes
  • LEDs Light Emitting Diodes
  • LEDs are currently packaged as clusters in a small envelop to replace individual incandescent bulbs or in small linear arrays designed as small direct projection radiation sites within a tube as a replacement for a single fluorescent tube.
  • These "LED” fluorescent tubes require the same fixture style and parts as the standard fluorescent tube fixture, but without the ballast, as illustrated in Figure.
  • An aspect of the present invention provides a lighting fixture including one or more light pipes having optical scallop contours on a top side, the scallop contours further including a layer of high specular reflector material, a first light emitting diode (LED) pump assembly associated with the one or more light pipes, and a power supply providing power to the light emitting diode pump.
  • a lighting fixture including one or more light pipes having optical scallop contours on a top side, the scallop contours further including a layer of high specular reflector material, a first light emitting diode (LED) pump assembly associated with the one or more light pipes, and a power supply providing power to the light emitting diode pump.
  • LED light emitting diode
  • the present invention provides that the high specular reflector material is selected from the group including of silver foil, aluminum foil, paint such as silver or aluminum, and a chemical such as barium sulphate, or the like.
  • the one or more light pipes also form a front panel having an exposed side, with the scallop contours arranged to pump light through the exposed side.
  • light emitting diode pump assembly may be coupled to the front panel, either directly or by means of another light pipe, which may be integral to the one or more light pipes of separate.
  • the lighting fixture is configured as a standard ceiling drop down fluorescent lighting fixture.
  • wavelength of light emitted from the LED pump assembly is white at a predetermined temperature.
  • the wavelength of light emitted from the LED pump assembly is may be another, non-white color at a predetermined temperature.
  • the wavelength of light emitted from the first LED pump assembly is fixed. In another the wavelength of light emitted from the first LED pump assembly is variable.
  • first LED pump assembly is positioned on one side of the light pipes, and more than one LED provides light for each scallop contour.
  • a second LED pump assembly is associated with the light pipes, with the second LED pump assembly being positioned opposite the first LED pump assembly.
  • the first LED pump assembly and second LED pump assembly pump light to alternate scallop contours.
  • a lighting fixture including one or more light pipes, each having optical contours configured as a horseshoe with unequal sides on a top side a layer of high specular reflector material, a first light emitting diode pump assembly associated with the one or more light pipes, wherein the LED pump assembly is configured as a dense cluster of LEDs producing a highly concentrated luminous flux and, a power supply providing power to the light emitting diode pump.
  • the lighting fixture is designed to provide wall lighting.
  • Figure 1 depicts an exemplary LED light pipe lighting fixture useful for understanding the present invention.
  • Figure 2 depicts an exemplary LED light pipe panel end view detail useful for understanding the present invention.
  • Figure 3 depicts an exemplary LED pump assembly useful for understanding the present invention.
  • Figure 4 illustrates an LED light pipe TIR mode, useful for understanding the present invention.
  • Figure 5 depicts an exemplary top mounted LED pump useful for understanding the present invention.
  • Figure 6 depicts a prior art conventional fluorescent light fixture employing
  • LED light pipe lighting technology is a brilliant illumination concept using high efficiency LEDs in a unique design that can replace many conventional light fixtures such as, but not limited to: fluorescent ceiling lighting fixtures.
  • This LED lighting technology provides benefits in lower installation cost, lower cost of ownership, lower room heating, higher illumination availability, higher efficiency, elimination of faculae, flexibility in re-layout lighting and avoidance of hazard waste.
  • LED light pipe lighting technology should not be confused with "LED fluorescent tubes” which is a name common in the industry to describe a fluorescence tube shape containing a linear array of LEDs that is designed to replace individual fluorescent tubes.
  • An embodiment of the present invention advantageously provides for use of
  • LED light pipe lighting technology having numerous advantages compared with fluorescent tube fixtures. These advantages include but are not limited to: Increased Lifespan: Last twice as long as the average fluorescent tube, Lower Cost of ownership: At least 65% of a fluorescent fixture cost today, but projected to be less than 50% within 5 years, Lower Heat output: Does not cause heat buildup under fixture - temperature can be up to 2 degrees warmer under fluorescent tubes, Higher Efficiency: Lower electrical power cost to operate for same luminous flux, Higher Comfort Level: More ergonomic than fluorescent tubes - fluorescent tubes are not ergonomic: light is drab and all bulbs flicker - though not always visible to the human eye, No Hazardous Material: Fluorescent tubes contain mercury and must be disposed in hazardous material landfill, No Faculae (light or dark spots): LED light is well-distributed and more uniform from fixture, Improved Light fade: LEDs maintain rated luminous flux output for a longer period of their useful life, Ease of Re-lighting or location change: low voltage modular fixture simply replaces other ceiling tiles and plugs into dc power supply line, similar
  • the present invention can produce a light panel for other uses, such as display backlights, a "wall of light", illuminated table tops or horizontal or curved surfaces, portable light panels for use in the entertainment industry.
  • FIG. 1 presents an exemplary light pipe lighting fixture in accordance with an embodiment of the invention.
  • LED light pipe lighting technology is shown, which includes a light fixture module consisting of a light pipe that doubles as a fixture front panel 100, LED pump module 200 and AC-DC power converter module 300.
  • the light pipe panel 100 is designed as a standard ceiling tile panel, typically 24" x 48", and can therefore replace any opaque ceiling panel.
  • the light pipe is designed with a unique optical scallop patterned lenses/contours (hereinafter scallop) on the top 400 and may have a different contour, including flat, on the bottom 410, or output face.
  • scallop optical scallop patterned lenses/contours
  • the top scallop includes an overcoat, layer or deposition of a high specular reflector material 500, 900.
  • This material may cover the top 100% or less than 100%.
  • the material may be, but is not limited to silver foil, aluminum foil, paint such as silver or aluminum and a chemical like barium sulphate.
  • selective overlays to the sides may be incorporated and these overlays further enhance efficacy, defined as the ratio of total luminous flux from the fixture to the power required to generate it.
  • the light panel has one Light Emitting
  • Diode (LED) pump assembly 200 attached to one side. This is illustrated in detail in Figure 3.
  • the pump assembly 200 consists of an array of surface mount LEDs 300 attached to a heat sink 400. This attachment incorporates appropriate insulators (one or two) which isolate the diode connections from the metal heat sink. The spacing of these LEDs corresponds to the scallop dimension or distance between scallop centers of the light pipe panel 100.
  • FIG. 4 An extraction from the concept presented in Figure 1 is provided where only one scallop is illustrated in order to illustrate a concept referred to herein as "total internal reflection", or "TIR".
  • TIR total internal reflection
  • specular scattering media 900 causes light to exceed the TIR total internal reflection critical angle, thus causing light to escape the base of cylinder at a defined and or desired angle 700.
  • the LED pump assembly 200 When the LED pump assembly 200 is connected to the light pipe panel 100 the LEDs are close to or touching the polished end of the light pipe panel 100. This coupling, pumps radiation into the light pipe, and by virtue of the top scallop design, high reflectance strip and overcoat operating in the TIR mode, the LED light is emitted from the front surface of the panel with high efficiency.
  • the detailed design of the top scallop design, scallop to scallop interface notch, together with the top coatings treatment and configuration of the bottom panel profile are design optimization parameters leading to better than 85% efficacy.
  • the number of LEDs in the pump assembly, LED spacing, LED pump configuration together with their Luminous flux are design parameters that can be tailored to produce an LED fixture that has the same, more or less brightness when compared to a fluorescent fixture of similar dimensions. This parametric tradeoff of course follows the optimization of coupling efficiency in the design of the light pipe panel 100 scallops 400 and specular scattering media 900 overlay.
  • the LED Light Pipe Lighting fixture illustrated in Figure 1 is only one of several important LED pump configurations.
  • the Figure 1 configuration is described as one side pumping of each scallop by one LED.
  • Other configurations included in this concept are, but not limited to:
  • One or more LED pumps on top of the light pipe panel 100 with each pump reconfigured as a dense cluster of LEDs producing a highly concentrated Luminous flux. And with this radiation coupled into the side of light pipe panel 100 using a second light pipe configured as a horseshoe with unequal sides.
  • This light pipe horseshoe 800 illustrated in Figure 5, couples the Luminous flux in a horizontal direction from the LED pump(s) and directs it 180° into the side of the light pipe panel 100. This concept is illustrated in Figure 5.
  • the horseshoe light pipe 800 spreads in the horizontal direction to cover all or part of the light pipe panel 100 length. More than one horseshoe light pipe 800 may be used.

Abstract

L'invention porte sur un appareil d'éclairage comprenant un ou plusieurs conduits de lumière [100] ayant des contours dentelés optiques [400] sur un côté supérieur, les contours dentelés [400] comprenant en outre une couche de matériau à forte réflexion spéculaire [900], un premier ensemble de pompage à diode électroluminescente (DEL) [200] associé au ou aux conduits de lumière [100], et une alimentation électrique [300] fournissant de l'énergie à l'ensemble de pompage à diode électroluminescente [200].
PCT/US2012/052268 2011-08-24 2012-08-24 Eclairage par conduits de lumière à lumière brillante à del WO2013028972A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161526706P 2011-08-24 2011-08-24
US61/526,706 2011-08-24

Publications (1)

Publication Number Publication Date
WO2013028972A1 true WO2013028972A1 (fr) 2013-02-28

Family

ID=47746900

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/052268 WO2013028972A1 (fr) 2011-08-24 2012-08-24 Eclairage par conduits de lumière à lumière brillante à del

Country Status (1)

Country Link
WO (1) WO2013028972A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10036881B2 (en) 2014-05-23 2018-07-31 Pathonomic Digital microscope system for a mobile device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5136480A (en) * 1989-02-10 1992-08-04 Lumitex, Inc. Thin panel illuminator
US5521725A (en) * 1993-11-05 1996-05-28 Alliedsignal Inc. Illumination system employing an array of microprisms
US20070236413A1 (en) * 2006-03-29 2007-10-11 3M Innovative Properties Company Fluted optical plate with internal light sources and systems using same
US20080137332A1 (en) * 2006-09-12 2008-06-12 Paul Lo Integrally formed single piece light emitting diode light wire
US7581867B2 (en) * 2004-06-03 2009-09-01 Skc Haas Display Films Co., Ltd. Brightness enhancement film using an array of light concentrators
US20100284181A1 (en) * 2009-05-05 2010-11-11 O'brien Aaron Light Fixture with Directed LED Light
US7855815B2 (en) * 2007-09-25 2010-12-21 Canon Kabushiki Kaisha Light guide optical system, document illuminating device using same, and image reading apparatus using same
US20110164405A1 (en) * 2008-07-17 2011-07-07 Koninklijke Philips Electronics N.V. Optical element for inducing a variation of light from a light source

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5136480A (en) * 1989-02-10 1992-08-04 Lumitex, Inc. Thin panel illuminator
US5521725A (en) * 1993-11-05 1996-05-28 Alliedsignal Inc. Illumination system employing an array of microprisms
US7581867B2 (en) * 2004-06-03 2009-09-01 Skc Haas Display Films Co., Ltd. Brightness enhancement film using an array of light concentrators
US20070236413A1 (en) * 2006-03-29 2007-10-11 3M Innovative Properties Company Fluted optical plate with internal light sources and systems using same
US20080137332A1 (en) * 2006-09-12 2008-06-12 Paul Lo Integrally formed single piece light emitting diode light wire
US7855815B2 (en) * 2007-09-25 2010-12-21 Canon Kabushiki Kaisha Light guide optical system, document illuminating device using same, and image reading apparatus using same
US20110164405A1 (en) * 2008-07-17 2011-07-07 Koninklijke Philips Electronics N.V. Optical element for inducing a variation of light from a light source
US20100284181A1 (en) * 2009-05-05 2010-11-11 O'brien Aaron Light Fixture with Directed LED Light

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10036881B2 (en) 2014-05-23 2018-07-31 Pathonomic Digital microscope system for a mobile device

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