EP1847762B1 - Kompakte Beleuchtungsvorrichtung, insbesondere anwendbar bei einer zahnärztlichen Lampe - Google Patents

Kompakte Beleuchtungsvorrichtung, insbesondere anwendbar bei einer zahnärztlichen Lampe Download PDF

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Publication number
EP1847762B1
EP1847762B1 EP07106219A EP07106219A EP1847762B1 EP 1847762 B1 EP1847762 B1 EP 1847762B1 EP 07106219 A EP07106219 A EP 07106219A EP 07106219 A EP07106219 A EP 07106219A EP 1847762 B1 EP1847762 B1 EP 1847762B1
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EP
European Patent Office
Prior art keywords
lighting device
led light
ellipsoid
light sources
reflectors
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.)
Active
Application number
EP07106219A
Other languages
English (en)
French (fr)
Other versions
EP1847762A3 (de
EP1847762A2 (de
Inventor
Angelo Favonio
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.)
F A R O FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE SpA
Faro SpA
Original Assignee
F A R O FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE SpA
Faro SpA
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
Priority claimed from ITMI20060770 external-priority patent/ITMI20060770A1/it
Priority claimed from ITMI20061812 external-priority patent/ITMI20061812A1/it
Application filed by F A R O FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE SpA, Faro SpA filed Critical F A R O FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE SpA
Priority to PL07106219T priority Critical patent/PL1847762T3/pl
Publication of EP1847762A2 publication Critical patent/EP1847762A2/de
Publication of EP1847762A3 publication Critical patent/EP1847762A3/de
Application granted granted Critical
Publication of EP1847762B1 publication Critical patent/EP1847762B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement of light sources
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/777—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having directions perpendicular to the light emitting axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68—Details of reflectors forming part of the light source
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/40—Hand grips
    • 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
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21W2131/20—Lighting for medical use
    • F21W2131/202—Lighting for medical use for dentistry
    • 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 present invention refers to a compact lighting device, in particular for use in a dental lamp.
  • a suitable lamp generally applied to the end of an articulated arm, in turn fastened to a fixed structure, said lamp being able to be moved so as to aim the light beam emitted by it at the desired point.
  • the mobile arm can be fixed to the body of a more complex dental apparatus, or else directly to a wall.
  • lighting devices of a suitably small size, which can be worn directly by the dentist.
  • This type of lamp must respect a series of requirements, which meet different needs.
  • a first requirement of dental lamps is to concentrate the light beam, and this is due to the need to light up the patient's oral cavity in the best possible way, without bothering the eyes.
  • a second requirement of dental lamps is to provide a light radiation that possesses the characteristics of a white light and, more specifically that preferably has the following trichromaticity coordinates of the 4 extreme points:
  • the light radiation must not alter the perception of colour of the surface of a patient's teeth by the dentist, because otherwise it could compromise the choice of colour of a possible dental prosthesis or of the joining cement necessary for a possible filling.
  • the infrared component of the light radiation emitted must be low, with a power density E ⁇ 350 W/m 2 on the work surface, to avoid the patient's body heating up.
  • UV-C ultraviolet 280nm
  • UV-B 280nm - 315nm
  • UV-A UV- 400 nm
  • the light radiation must have a low emission in the wavelength range from 400 nm to 500nm to avoid the polymerisation of the cement.
  • dental lamps comprising a plurality of light sources, in particular a plurality of LED light sources (light emitting diodes), in combination with optical devices, like for example a corresponding number of shaped lenses, arranged between the light source and the surface of the object to be lit up, hereafter also known as work surface, or else a suitably curved reflecting surface, arranged on the opposite side to the plurality of light sources with respect to the work surface.
  • a plurality of light sources in particular a plurality of LED light sources (light emitting diodes)
  • optical devices like for example a corresponding number of shaped lenses, arranged between the light source and the surface of the object to be lit up, hereafter also known as work surface, or else a suitably curved reflecting surface, arranged on the opposite side to the plurality of light sources with respect to the work surface.
  • the shaped lenses or the reflecting surface are able to converge the light emitted by all of these LED light sources in a well-defined area, which comprises the work surface.
  • the devices used today are substantially bulky.
  • the rotation of the device about its barycentral horizontal axis is made possible thanks to one or two pins that are positioned laterally in a position outside of the head.
  • Such a configuration substantially hinders and/or impedes the mobility of the dentist.
  • the general purpose of the present invention is to solve the aforementioned drawbacks of the prior art in an extremely simple, cost-effective and particularly functional manner.
  • Another purpose is to provide a compact lighting device capable of defining the shape and size of the spot of light that can be obtained on the work surface.
  • a lighting device is provided that allows both the overall weight and the cooling requirements of the dental lamp to be limited.
  • the device according to the invention has a smaller bulk than those commonly used.
  • the lighting device in question is wholly indicated with 10, and in the illustrated examples, according to the present invention, it comprises a pair of power LEDs 11, each associated with a primary collimation group 12 and a secondary reflector 13.
  • the two LEDs 11 are also housed on the same dissipator 14.
  • the lighting device is symmetrical with respect to an axis, indicated with Z in a cartesian reference system shown in figures 1 and 2 .
  • the primary collimation groups 12 have the task of converging the light radiation coming from the two LEDs 11 in two respective cones, the vertices of which converge in the first focus of an ellipsoid, and the surfaces of which intersect the surface of said ellipsoid defining two areas at which said secondary reflectors 13 are arranged.
  • This optical arrangement allows a virtual image of the emission area of each LED to be defined, positioned at the first focus of the ellipsoid.
  • the optical system according to the present invention whilst still consisting of a light source that is not point-shaped, allows the beam of light emitted by the light sources to be concentrated close to the second focus.
  • each reflector 13 is made by putting together a plurality of facets.
  • Each of these facets projects the virtual image by exploiting the optical properties of the ellipsoid, even if the surface of the reflectors does not perfectly coincide with that of the ellipsoid. Consequently, the projection of the light beams coming from the LEDs does not pass perfectly to the second focus, but a concentration of the beam is obtained in any case.
  • This scheme therefore allows two or more light sources to be used, arranged a certain distance apart, symmetrically with respect to the axis Z, and consequently a certain distance from said axis Z, as if they were actually situated on it.
  • the axis Z therefore constitutes the optical axis of the lighting device 10 as a whole, coinciding with that which would be the optical axis of a single reflector with elliptical curvature used instead of the two secondary reflectors 13 of the lighting device 10 as shown according to a preferred embodiment of the present invention.
  • the light flow is able to be concentrated in a simple manner and a light image according to the specific needs defined previously can be obtained.
  • a further consequence of this arrangement of the components of the lighting device 10 according to the present invention is that of allowing the focalisation with respect to the reflector to be maintained by moving the group consisting of the two LED light sources 11 and the corresponding primary collimation groups 12 along the axis Z, defining the shape and size of the light spot on the work surface.
  • the LED light sources 11 are housed on the same dissipator 14, suitably equipped with fins 15 to increase the dissipation surface.
  • the material of the LEDs is suitably selected from those that emit a light radiation in the range of reference trichromaticity coordinates.
  • the lighting device 10 shall be installed inside a box-shaped body that may or may not comprise a screen at the area crossed by the light beam emitted by the secondary reflectors 13.
  • the device 10 has a pin 18 suitable for allowing it to rotate about a barycentral horizontal axis 16.
  • Such a pin 18 is placed at the barycentre 21 of the device 10.
  • the two handles 19 are arranged behind, and no longer at the side of, the reflectors 13 giving the structure substantial compactness.
  • the compact lighting device according to the present invention has the following advantages with respect to the solutions of the prior art.
  • the particular arrangement of the optical elements used allows a plurality of LED light sources to be used whose radiation is, however, emitted as if it came from a single point-shaped source, with the advantage of allowing optimal design of the reflecting surfaces.
  • the work surface is hit by two (or more) optical beams coming from two (or more) distinct axial directions, with the advantage of substantially reducing the shadows due to objects placed between the lighting device and the work surface.
  • An important characteristic of the lighting device according to the invention is the possibility of axial focalisation of the light sources with respect to the secondary reflectors.
  • the choice of suitable materials allows a light radiation with the characteristics (trichromaticity coordinates, color rendering, absence of ultraviolet, low blue content) required in the field of dentistry to be obtained.
  • the shapes of the lighting device of the invention can be different from the one shown only as a non-limiting example in the drawings, just as the materials can also be different.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (10)

  1. Beleuchtungseinrichtung (10), insbesondere zur Verwendung bei einer zahnärztlichen Lampe,
    dadurch gekennzeichnet , dass
    sie mehr als eine optische Gruppe umfasst, von denen jede eine LED-Lichtquelle (11), eine Kollimationsgruppe (12) und einen Reflektor (13) umfasst, wobei die Kollimationsgruppen (12) in der Nähe der jeweiligen LED-Lichtquellen (11) angeordnet sind und die von diesen stammende Lichtstrahlung zu jeweiligen Lichtkegeln konvergieren, deren Scheitel sich in der Nähe eines gemeinsamen Punktes befinden, welcher den ersten Brennpunkt eines Ellipsoiden definiert, und welche die Oberfläche des Ellipsoiden schneiden, wobei sie jeweilige Flächen definieren, an welchen die jeweiligen Reflektoren (13) angeordnet sind, deren Oberflächen sich derjenigen des Ellipsoiden annähern.
  2. Beleuchtungseinrichtung nach Anspruch 1,
    dadurch gekennzeichnet , dass
    sie einen Stift (18) für die Drehung der Einrichtung (10) um eine Schwerpunktachse (16) der Einrichtung umfasst, wobei der Stift (18) an einem Schwerpunkt (21) angeordnet ist.
  3. Beleuchtungseinrichtung nach Anspruch 2,
    dadurch gekennzeichnet , dass
    sie zwei Griffe (19) umfasst, die im Wesentlichen hinter den Reflektoren (13) angeordnet sind.
  4. Beleuchtungseinrichtung nach Anspruch 1,
    dadurch gekennzeichnet , dass
    sie ein Mittel zum Bewegen der LED-Lichtquellen (11) und der entsprechenden primären Kollimationsgruppen (12) mit Bezug auf die Reflektoren (13) umfasst.
  5. Beleuchtungseinrichtung nach Anspruch 1,
    dadurch gekennzeichnet , dass
    die LED-Lichtquellen (11) weißes Licht emittieren.
  6. Beleuchtungseinrichtung nach Anspruch 5,
    dadurch gekennzeichnet , dass
    die LED-Lichtquellen (11) weißes Licht mit den folgenden dreifarbigen Koordinaten der vier Extrempunkte emittieren:
    1. x = 0,310; y = 0,369;
    2. x = 0,316; y = 0,322;
    3. x = 0,414; y = 0,428;
    4. x = 0,396; y = 0,377;
    und mit einem Farbwiedergabeindex Ra > 85.
  7. Beleuchtungseinrichtung nach Anspruch 1,
    dadurch gekennzeichnet , dass
    die Reflektoren (13) aus einer Vielzahl zueinander benachbarter Facetten bestehen.
  8. Beleuchtungseinrichtung nach Anspruch 1,
    dadurch gekennzeichnet , dass
    die Kollimationsgruppen (12) aus einer Vielzahl von Linsen bestehen.
  9. Beleuchtungseinrichtung nach Anspruch 1,
    dadurch gekennzeichnet , dass
    sie Wärmedissipatoren (14) umfasst.
  10. Beleuchtungseinrichtung nach Anspruch 1,
    dadurch gekennzeichnet , dass
    sie auch optische Filter umfasst.
EP07106219A 2006-04-19 2007-04-16 Kompakte Beleuchtungsvorrichtung, insbesondere anwendbar bei einer zahnärztlichen Lampe Active EP1847762B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07106219T PL1847762T3 (pl) 2006-04-19 2007-04-16 Kompaktowy przyrząd oświetlający, w szczególności do zastosowania w lampie dentystycznej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20060770 ITMI20060770A1 (it) 2006-04-19 2006-04-19 Dispositivo di illuminazione, in particolare per l'uso in una lampada dentale
ITMI20061812 ITMI20061812A1 (it) 2006-09-26 2006-09-26 Dispositivo di illuminazione compatto,in particolare per l'uso in una lampada dentale

Publications (3)

Publication Number Publication Date
EP1847762A2 EP1847762A2 (de) 2007-10-24
EP1847762A3 EP1847762A3 (de) 2008-08-27
EP1847762B1 true EP1847762B1 (de) 2009-07-08

Family

ID=38255108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07106219A Active EP1847762B1 (de) 2006-04-19 2007-04-16 Kompakte Beleuchtungsvorrichtung, insbesondere anwendbar bei einer zahnärztlichen Lampe

Country Status (6)

Country Link
EP (1) EP1847762B1 (de)
AT (1) ATE435997T1 (de)
DE (1) DE602007001479D1 (de)
ES (1) ES2330054T3 (de)
HK (1) HK1105223A1 (de)
PL (1) PL1847762T3 (de)

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DE202010016955U1 (de) 2010-05-20 2011-08-31 Auer Lighting Gmbh Reflektorleuchte mit wenigstens zwei Leuchtdiodenlichtquellen
CN102753881A (zh) * 2010-02-10 2012-10-24 宗拓贝尔照明器材有限公司 具有点状光源和反射器的发光装置
US9581312B2 (en) 2010-12-06 2017-02-28 Cree, Inc. LED light fixtures having elongated prismatic lenses
USD786471S1 (en) 2013-09-06 2017-05-09 Cree, Inc. Troffer-style light fixture
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US10883702B2 (en) * 2010-08-31 2021-01-05 Ideal Industries Lighting Llc Troffer-style fixture
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US8905575B2 (en) 2012-02-09 2014-12-09 Cree, Inc. Troffer-style lighting fixture with specular reflector
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US9494294B2 (en) 2012-03-23 2016-11-15 Cree, Inc. Modular indirect troffer
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US9360185B2 (en) 2012-04-09 2016-06-07 Cree, Inc. Variable beam angle directional lighting fixture assembly
US9874322B2 (en) 2012-04-10 2018-01-23 Cree, Inc. Lensed troffer-style light fixture
US9488330B2 (en) 2012-04-23 2016-11-08 Cree, Inc. Direct aisle lighter
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US8931929B2 (en) 2012-07-09 2015-01-13 Cree, Inc. Light emitting diode primary optic for beam shaping
US9441818B2 (en) 2012-11-08 2016-09-13 Cree, Inc. Uplight with suspended fixture
US9494304B2 (en) 2012-11-08 2016-11-15 Cree, Inc. Recessed light fixture retrofit kit
US9482396B2 (en) 2012-11-08 2016-11-01 Cree, Inc. Integrated linear light engine
US9423104B2 (en) 2013-03-14 2016-08-23 Cree, Inc. Linear solid state lighting fixture with asymmetric light distribution
US10648643B2 (en) 2013-03-14 2020-05-12 Ideal Industries Lighting Llc Door frame troffer
US9052075B2 (en) 2013-03-15 2015-06-09 Cree, Inc. Standardized troffer fixture
US10451253B2 (en) 2014-02-02 2019-10-22 Ideal Industries Lighting Llc Troffer-style fixture with LED strips
USD772465S1 (en) 2014-02-02 2016-11-22 Cree Hong Kong Limited Troffer-style fixture
USD749768S1 (en) 2014-02-06 2016-02-16 Cree, Inc. Troffer-style light fixture with sensors
US10527225B2 (en) 2014-03-25 2020-01-07 Ideal Industries, Llc Frame and lens upgrade kits for lighting fixtures
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CN102753881A (zh) * 2010-02-10 2012-10-24 宗拓贝尔照明器材有限公司 具有点状光源和反射器的发光装置
DE202010016955U1 (de) 2010-05-20 2011-08-31 Auer Lighting Gmbh Reflektorleuchte mit wenigstens zwei Leuchtdiodenlichtquellen
US9581312B2 (en) 2010-12-06 2017-02-28 Cree, Inc. LED light fixtures having elongated prismatic lenses
USD786471S1 (en) 2013-09-06 2017-05-09 Cree, Inc. Troffer-style light fixture
USD807556S1 (en) 2014-02-02 2018-01-09 Cree Hong Kong Limited Troffer-style fixture

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ES2330054T3 (es) 2009-12-03
DE602007001479D1 (de) 2009-08-20
EP1847762A3 (de) 2008-08-27
PL1847762T3 (pl) 2010-01-29
HK1105223A1 (en) 2008-02-06
EP1847762A2 (de) 2007-10-24
ATE435997T1 (de) 2009-07-15

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