Source: https://patents.google.com/patent/WO2008061084A1/en
Timestamp: 2019-11-22 06:25:58
Document Index: 279588880

Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No.\n11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No.\n11', 'Application No. 60', 'Application No. 11', 'Application No. 60', 'Application No. 11']

WO2008061084A1 - Lighting assemblies and components for lighting assemblies - Google Patents
WO2008061084A1
WO2008061084A1 PCT/US2007/084519 US2007084519W WO2008061084A1 WO 2008061084 A1 WO2008061084 A1 WO 2008061084A1 US 2007084519 W US2007084519 W US 2007084519W WO 2008061084 A1 WO2008061084 A1 WO 2008061084A1
PCT/US2007/084519
2006-11-14 Priority to US60/859,013 priority
2007-11-13 Application filed by Cree Led Lighting Solutions, Inc. filed Critical Cree Led Lighting Solutions, Inc.
2008-05-22 Publication of WO2008061084A1 publication Critical patent/WO2008061084A1/en
A lighting assembly (10), comprising a light engine assembly (11) and a room-side element (12). The room-side element (12) is in contact with the light engine assembly (11). The light engine assembly (11) comprises at least one trim element (13) and a light engine (15). The trim element (13) defines a trim element internal space (16). The light engine (15) comprises at least one solid state light emitter (18), and is positioned within the trim element internal space (16). Also, a lighting assembly (10), comprising a light engine assembly (11) and means for dissipating heat (75) from the light engine assembly (11).
This application claims the benefit of U.S. Provisional Patent Application No. 60/859,013, filed November 14, 2006, the entirety of which is incorporated herein by reference.
Additionally, efforts have been ongoing to develop ways by which solid state light emitters can be used in place of incandescent lights, fluorescent lights and other light- generating devices in a wide variety of applications. In addition, where light emitting diodes (or other solid state light emitters) are already being used, efforts are ongoing to provide lighting assemblies (which include light emitting diodes or other solid state light emitters) which are improved, e.g., with respect to energy efficiency, color rendering index (CRJ Ra), contrast, efficacy (lm/W), and/or duration of service.
Brief Summary of the Inventionfs^
Conversely, the dissipation of heat from LEDs and other solid state light emitters within a recessed downlight is very critical. For instance, if LED junction temperatures are not maintained below manufacturers' ratings, decreased lamp life and compromised performance result. The light engine assemblies according to the present inventive subject matter provide excellent heat dissipation, particularly in the room-side of the device. In one aspect of the present inventive subject matter, there are provided lighting assemblies which have increased surface area and mass where the lighting assembly extends into the room. In some embodiments of the present inventive subject matter, there is provided a lighting assembly which comprises a light engine assembly (a majority of which or the entirety of which is not in the room) and a room-side element which extends into the room and which includes structure which functions as a heat sink.
In some embodiments according to the present inventive subject matter, the trim element comprises a flange portion, the flange portion extending farther from an axis of the trim element than all other portions of the trim element, at least a portion of the room-side element being in contact with at least a portion of the flange portion. In some such embodiments, the flange portion extends in a plane which is substantially perpendicular to an axis of the trim element. In some embodiments according to the present inventive subject matter, the room-side element comprises a plurality of heat dissipating fins. In some such embodiments:
In some embodiments according to the present inventive subject matter: the room-side element comprises at least one solid state light emitter; and any planar section which includes an axis of the trim element includes (1) at least a first heat dissipating fin which extends from the trim element in a direction substantially parallel to an axis of the trim element and (2) at least two other heat dissipating fins which are substantially parallel with each other. In some embodiments according to the present inventive subject matter,: the light engine assembly further comprises a light engine housing positioned within the trim element internal space, the light engine housing defining a light engine housing internal space, and the light engine is positioned within the light engine housing internal space. In some such embodiments: an external surface of the light engine housing is in contact with an internal surface of the trim element;
the trim element and the first light diffuser together define a trim element- diffuser internal space, and
In some embodiments according to the present inventive subject matter, the lighting assembly further comprises a lighting device housing, the lighting device housing defining a lighting device housing internal space, at least a portion of the light engine assembly being positioned within the lighting device housing internal space. The lighting assemblies of the present inventive subject matter include unique heat dissipation structure extending from the trim element to increase the surface area and mass of the assembly, and enable heat dissipation through convective cooling with room air.
Fig. 1 is a perspective view of a first embodiment of a lighting assembly in accordance with the present inventive subject matter. Fig. 2 is a sectional view of the first embodiment depicted in Fig. 1.
Fig. 7 is a perspective view of a second embodiment of a lighting assembly in accordance with the present inventive subject matter. Fig. 8 is a perspective exploded view of the second embodiment depicted in Fig. 7.
Fig. 10 is a sectional view of a third embodiment of a lighting assembly in accordance with the present inventive subject matter. Fig. 11 is a sectional view of a fourth embodiment of a lighting assembly in accordance with the present inventive subject matter.
Fig. 12 is a sectional view of a fifth embodiment of a lighting assembly in accordance with the present inventive subject matter. Detailed Description of the Inventionfs)
The present inventive subject matter now will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the inventive subject matter are shown. However, this inventive subject matter should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive subject matter to those skilled in the art. Like numbers refer to like elements throughout. As used herein the term "and/or" includes any and all combinations of one or more of the associated listed items. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the inventive subject matter. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The expression "illumination" (or "illuminated"), as used herein when referring to a solid state light emitter, means that at least some current is being supplied to the solid state light emitter to cause the solid state light emitter to emit at least some light. The expression "illuminated" encompasses situations where the solid state light emitter emits light continuously or intermittently at a rate such that a human eye would perceive it as emitting light continuously, or where a plurality of solid state light emitters of the same color or different colors are emitting light intermittently and/or alternatingly (with or without overlap in "on" times) in such a way that a human eye would perceive them as emitting light continuously (and, in cases where different colors are emitted, as a mixture of those colors). The expression "excited", as used herein when referring to a lumiphor, means that at least some electromagnetic radiation (e.g., visible light, UV light or infrared light) is contacting the lumiphor, causing the lumiphor to emit at least some light. The expression "excited" encompasses situations where the lumiphor emits light continuously or intermittently at a rate such that a human eye would perceive it as emitting light continuously, or where a plurality of lumiphors of the same color or different colors are emitting light intermittently and/or alternatingly (with or without overlap in "on" times) in such a way that a human eye would perceive them as emitting light continuously (and, in cases where different colors are emitted, as a mixture of those colors). The expression "lighting device", as used herein, is not limited, except that it indicates that the device is capable of emitting light. That is, a lighting device can be a device which illuminates an area or volume, e.g., a structure, a swimming pool or spa, a room, a warehouse, an indicator, a road, a parking lot, a vehicle, signage, e.g., road signs, a billboard, a ship, a toy, a mirror, a vessel, an electronic device, a boat, an aircraft, a stadium, a computer, a remote audio device, a remote video device, a cell phone, a tree, a window, an LCD display, a cave, a tunnel, a yard, a lamppost, or a device or array of devices that illuminate an enclosure, or a device that is used for edge or back-lighting (e.g., back light poster, signage, LCD displays), bulb replacements (e.g., for replacing AC incandescent lights, low voltage lights, fluorescent lights, etc.), lights used for outdoor lighting, lights used for security lighting, lights used for exterior residential lighting (wall mounts, post/column mounts), ceiling fixtures/wall sconces, under cabinet lighting, lamps (floor and/or table and/or desk), landscape lighting, track lighting, task lighting, specialty lighting, ceiling fan lighting, archival/art display lighting, high vibration/impact lighting - work lights, etc., mirrors/vanity lighting, or any other light emitting device.
The expression "in contact", as used in the present specification, means that the first structure which is "in contact" with a second structure can be in direct contact with the second structure, or can be separated from the second structure by one or more intervening structures (i.e., in indirect contact), where the first and second structures, and the one or more intervening structures each have at least one surface which is in direct contact with another surface selected from among surfaces of the first and second structures and surfaces of the one or more intervening structures. The expression "in direct contact", as used in the present specification, means that the first structure which is "in direct contact" with a second structure is touching the second structure and there are no intervening structures between the first and second structures at least at some location.
the expression "substantially perpendicular", as used herein, means that at least 95% of the points in the structure which is characterized as being substantially perpendicular to a reference plane or line are located on one of or between a pair of planes (1) which are perpendicular to the reference plane, (2) which are parallel to each other and (3) which are spaced from each other by a distance of not more than 5% of the largest dimension of the structure;
the expression "substantially semi-elliptical" means that a semi-ellipse can be drawn having the formula x2/a2 + yVb2 = 1, where y > 0, and imaginary axes can be drawn at a location where the y coordinate of each point on the structure is within 0.95 to 1.05 times the value obtained by inserting the x coordinate of such point into such formula.
The trim element can be of any desired shape, and can be made of any desired material, a wide variety of both of which are well-known to persons skilled in the art. Representative examples of materials out of which the trim element can be made include rolled steel, spun aluminum, die cast aluminum, liquid crystal polymer, polyphenylene sulfide (PPS), thermoset bulk molded compound or other composite materials, which provide excellent heat transfer properties, which would assist in dissipating heat. As noted above, the light engine comprises at least one solid state light emitter. In some embodiments, the light engine further comprises structure for supporting each of the at least one solid state light emitter and electrically conductive structures (e.g., a printed circuit board) which carry power from at least one power source (which interfaces with the light engine) to the at least one solid state light emitter. Representative examples of suitable light engines for use according to the present inventive subject matter are described in:
U.S. Patent Application No. 60/846,222, filed on September 21, 2006, entitled "LIGHTING ASSEMBLIES, METHODS OF INSTALLING SAME, AND METHODS OF REPLACING LIGHTS" (inventors: Antony Paul van de Ven and Gerald H. Negley; attorney docket no. 931_021 PRO), and U.S. Patent Application
No. 11/859,048, filed September 21, 2007, the entireties of which are hereby incorporated by reference; and
U.S. Patent Application No. 60/853,589, filed on October 23, 2006, entitled "LIGHTING DEVICES AND METHODS OF INSTALLING LIGHT ENGINE HOUSINGS AND/OR TRIM ELEMENTS IN LIGHTING DEVICE HOUSINGS"
(inventors: Gary David Trott and Paul Kenneth Pickard; attorney docket number 931_038 PRO), the entirety of which is hereby incorporated by reference.
The one or more solid state light emitter can be any suitable solid state light emitter, a wide variety of which are well-known and readily available to persons skilled in the art. Solid state light emitters include inorganic and organic light emitters. Examples of types of such light emitters include a wide variety of light emitting diodes (inorganic oi organic, including polymei light emitting diodes (PLEDs)), laser diodes, thin film electroluminescent devices, light emitting polymers (LEPs), a variety of each of which are well-known in the art (and therefore it is not necessary to describe in detail such devices, and/or the materials out of which such devices are made). The expression "solid state light emitter", as used herein, can refer to a component including one or more solid state light emitter or a component including one or more solid state light emitter as well as one or more lumiphor. In some embodiments according to the present inventive subject matter, a lighting assembly includes one or more solid state light emitters which include at least one solid state light emitter and at least one lumiphor which emits light, at least a portion of such light emitted by the luminescent element being emitted in response to luminescent material in the luminescent element being excited by light emitted by the at least one solid state light emitter. As noted above, one type of solid state light emitter which can be employed are LEDs.
Such LEDs can be selected from among any light emitting diodes (a wide variety of which are readily obtainable and well known to those skilled in the art, and therefore it is not necessary to describe in detail such devices, and/or the materials out of which such devices are made). For instance, examples of types of light emitting diodes include inorganic and organic light emitting diodes, a variety of each of which are well-known in the art.
(1) U.S. Patent Application No. 60/753,138, filed on December 22, 2005, entitled "Lighting Device" (inventor: Gerald H. Negley; attorney docket number 931_003 PRO) and U.S. Patent Application No. 11/614,180, filed December 21, 2006, the entireties of which are hereby incorporated by reference;
(2) U.S. Patent Application No. 60/794,379, filed on April 24, 2006, entitled "Shifting Spectral Content in LEDs by Spatially Separating Lumiphor Films" (inventors: Gerald H. Negley and Antony Paul van de Ven; attorney docket number 931_006 PRO) and U.S. Patent Application No. 11/624,811, filed January 19, 2007, the entireties of which are hereby incorporated by reference;
(3) U.S. Patent Application No. 60/808,702, filed on May 26, 2006, entitled "Lighting Device" (inventors: Gerald H. Negley and Antony Paul van de Ven; attorney docket number 931_009 PRO) and U.S. Patent Application No. 11/751,982, filed May 22, 2007, the entireties of which are hereby incorporated by reference; (4) U.S. Patent Application No. 60/808,925, filed on May 26, 2006, entitled "Solid State Light Emitting Device and Method of Making Same" (inventors: Gerald H. Negley and Neal Hunter; attorney docket number 931 010 PRO) and U.S. Patent Application No. 11/753,103, filed May 24, 2007, the entireties of which are hereby incorporated by reference;
(5) U.S. Patent Application No. 60/802,697, filed on May 23, 2006, entitled "Lighting
Device and Method of Making" (inventor: Gerald H. Negley; attorney docket number 931_011 PRO) and U.S. Patent Application No. 11/751 ,990, filed May 22. 2007, the entireties of which are hereby incorporated by reference;
(6) U.S. Patent Application No. 60/839,453, filed on August 23, 2006, entitled "LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Antony Paul van de Ven and Gerald H. Negley; attorney docket number 931_034 PRO) and U.S. Patent Application No. 11/843,243, filed August 22, 2007, the entireties of which are hereby incorporated by reference;
(7) U.S. Patent Application No. 60/857,305, filed on November 7, 2006, entitled "LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Antony Paul van de Ven and Gerald H. Negley; attorney docket number 931_027 PRO, the entirety of which is hereby incorporated by reference; and
(8) U.S. Patent Application No. 60/851,230, filed on October 12, 2006, entitled "LIGHTING DEVICE AND METHOD OF MAKING SAME" (inventor: Gerald H. Negley; attorney docket number 931_041 PRO, the entirety of which is hereby incorporated by reference.
Some embodiments according to the present inventive subject matter include at least a fust LED and at least a first lumiphor. hi some such embodiments, the light emitted from the first LED has a peak wavelength in a range of from 430 run to 480 nm, and the light emitted from the first lumiphor has a dominant wavelength in a range of from about 555 nm to about
585 nm. Some embodiments according to the present inventive subject matter include at least a first LED, at least a first lumiphor and at least a second LED. In some such embodiments, the light emitted from the first LED has a peak wavelength in a range of from 430 nm to 480 nm, and the light emitted from the first lumiphor has a dominant wavelength in a range of from about 555 nm to about 585 nm, and the light emitted from the second LED has a dominant wavelength in a range of from 600 nm to 630 nm.
Some embodiments according to the present inventive subject matter include at least a first solid state light emitter (which, in some such embodiments includes at least a first LED and at least a first lumiphor) which, if illuminated, emits light which has x, y color coordinates which define a point which is within an area on a 1931 CEE Chromaticity
Diagram enclosed by first, second, third, fourth and fifth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to a fifth point, and the fifth line segment connecting the fifth point to the first point, the first point having x, y coordinates of 0.32, 0.40, the second point having x, y coordinates of 0.36, 0.48, the third point having x, y coordinates of 0.43, 0.45, the fourth point having x, y coordinates of 0.42, 0.42, and the fifth point having x, y coordinates of 0.36, 0.38.
(1) U.S. Patent Application No. 60/752,555, filed December 21, 2005, entitled "Lighting Device and Lighting Method" (inventors: Antony Paul Van de Ven and Gerald H. Negley; attorney docket number 931 004 PRO) and U.S. Patent Application No. 11/613,714, filed December 20, 2006, the entireties of which are hereby incorporated by reference;
(2) U.S. Patent Application No. 60/752,556, filed on December 21, 2005, entitled "SIGN AND METHOD FOR LIGHTING" (inventors: Gerald H. Negley and Antony Paul van de Ven; attorney docket number 931_005 PRO) and U.S. Patent Application No.
11/613,733, filed December 20, 2006, the entireties of which are hereby incorporated by reference;
(3) U.S. Patent Application No. 60/793,524, filed on April 20, 2006, entitled "LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Gerald H. Negley and Antony Paul van de Ven; attorney docket number 931_012 PRO) and U.S. Patent Application No. 11/736,761, filed April 18, 2007, the entireties of which are hereby incorporated by reference;
(4) U.S. Patent Application No. 60/793,518, filed on April 20, 2006, entitled "LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Gerald H. Negley and Antony Paul van de Ven; attorney docket number 931 013 PRO) and U.S. Patent Application No. 11/736,799, filed April 18, 2007, the entireties of which are hereby incorporated by reference;
(5) U.S. Patent Application No. 60/793,530, filed on April 20, 2006, entitled "LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Gerald H. Negley and Antony Paul van de Ven; attorney docket number 931 014 PRO) and U.S. Patent Application No. 11/737,321, filed April 19, 2007, the entireties of which are hereby incorporated by reference;
(6) U.S. Patent No. 7,213,940, issued on May 8, 2007, entitled "LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Antony Paul van de Ven and Gerald H. Negley; attorney docket number 931_035 NP), the entirety of which is hereby incorporated by reference;
(7) U.S. Patent Application No. 60/868,134, filed on December 1, 2006, entitled "LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Antony Paul van de Ven and Gerald H. Negley; attorney docket number 931_035 PRO), the entirety of which is hereby incorporated by reference; (8) U.S. Patent Application No. 60/868,986, filed on December 7, 2006, entitled "LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Antony Paul van de Ven and Gerald H. Negley; attorney docket number 931_053 PRO), the entirety of which is hereby incorporated by reference;
(9) U.S. Patent Application No. 60/857,305, filed on November 7, 2006, entitled
"LIGHTING DEVICE AND LIGHTING METHOD" (inventors: Antony Paul van de Ven and Gerald H. Negley; attorney docket number 931_027 PRO, the entirety of which is hereby incorporated by reference; and
(10) U.S. Patent Application No. 60/891,148, filed on February 22, 2007, entitled "LIGHTING DEVICE AND METHODS OF LIGHTING, LIGHT FILTERS AND
METHODS OF FILTERING LIGHT" (inventor: Antony Paul van de Ven; attorney docket number 931_057 PRO, the entirety of which is hereby incorporated by reference.
As indicated above, some embodiments of the lighting assemblies according to the present inventive subject matter can include lumiphors (i.e., luminescence region or luminescent element which comprises at least one luminescent material). The expression
"lumiphor", as used herein, refers to any luminescent element, i.e., any element which includes a luminescent material.
A wide variety of luminescent materials (also known as lumiphors or luminophoric media, e.g., as disclosed in U.S. Patent No. 6,600,175, the entirety of which is hereby incorporated by reference) are well-known and available to persons of skill in the art. For example, a phosphor is a luminescent material that emits a responsive radiation (e.g., visible light) when excited by a source of exciting radiation. In many instances, the responsive radiation has a wavelength which is different from the wavelength of the exciting radiation.
Other examples of luminescent materials include scintillators, day glow tapes and inks which glow in the visible spectrum upon illumination with ultraviolet light.
Luminescent materials can be categorized as being down-converting, i.e., a material which converts photons to a lower energy level (longer wavelength) or up-converting, i.e., a material which converts photons to a higher energy level (shorter wavelength). Inclusion of luminescent materials in LED devices has been accomplished by adding the luminescent materials to a clear encapsulant material (e.g., epoxy-based, silicone-based, glass-based or metal oxide-based material) as discussed above, for example by a blending or coating process.
For example, U.S. Patent No. 6,963,166 (Yano '166) discloses that a conventional light emitting diode lamp includes a light emitting diode chip, a bullet-shaped transparent housing to cover the light emitting diode chip, leads to supply current to the light emitting diode chip, and a cup reflector for reflecting the emission of the light emitting diode chip in a uniform direction, in which the light emitting diode chip is encapsulated with a first resin portion, which is further encapsulated with a second resin portion. According to Yano '166, the first resin portion is obtained by filling the cup reflector with a resin material and curing it after the light emitting diode chip has been mounted onto the bottom of the cup reflector and then has had its cathode and anode electrodes electrically connected to the leads by way of wiies. According to Yano '166, a phosphor is dispersed in the first resin portion so as to be excited with the light A that has been emitted from the light emitting diode chip, the excited phosphor produces fluorescence ("light B") that has a longer wavelength than the light A, a portion of the light A is transmitted through the first resin portion including the phosphor, and as a result, light C, as a mixture of the light A and light B, is used as illumination. As noted above, in some embodiments, the room-side element comprises: at least one heat dissipating fin; an annular region; at least one heat conducting element; an annular element; a heat sink structure; and/or at least one solid state light emitter. The heat dissipating fins and the annular region can be of any respective desired shape, and can be respectively made of any suitable material, a wide variety of which are well-known and readily available. Representative examples of materials out of which the heat dissipating fins and/or the annular region can be made are extruded aluminum, die cast aluminum, liquid crystal polymer, polyphenylene sulfide (PPS), thermoset bulk molded compound or other composite materials, which provide excellent heat transfer properties, which would assist in dissipating heat generated by the light engine. In some embodiments, the heat dissipating fins are integral with the trim element and/or the annular region.
As noted above, in some embodiments of the present inventive subject matter, the room-side element comprises at least one heat conducting element positioned between the trim element and the room-side element. The heat conducting element can be made of any suitable material, a wide variety of which are well-known and readily available. Representative examples of suitable materials for use as a heat conducting element include thermal epoxy, thermal grease and gap pads, suitable varieties of each of which are well-known by and readily available to persons skilled in the art. As noted above, in some embodiments of the present inventive subject matter, the room-side element comprises an annular element which has a plurality of concave portions, at least one solid state light emitter being positioned in each of at least some of the concave portions.
The annular element can be made of any suitable material, a wide variety of which are well-known and readily available. Representative examples of materials out of which the annular element can be made include extruded aluminum, die cast aluminum, liquid crystal polymer, polyphenylene sulfide (PPS), thermoset bulk molded compound or other composite materials, which provide excellent heat transfer properties, which would assist in dissipating heat. As noted above, in some embodiments of the present inventive subject matter, the room-side element comprises a heat sink structure.
The light engine housing can be made of any suitable material, a wide variety of which are well-known and readily available. Representative examples of materials out of which the light engine housing can be made are extruded aluminum, die cast aluminum, liquid crystal polymer, polyphenylene sulfide (PPS), thermoset bulk molded compound or other composite materials, which provide excellent heat transfer properties, which would assist in dissipating heat generated by the light engine. The light engine housing can be any desired shape. Representative shapes for the light engine housing include substantially cylindrical and substantially frustoconical.
As noted above, in some embodiments of the present inventive subject matter, the light engine assembly further comprises at least one thermal interface element positioned between the light engine housing and the trim element. The thermal interface element can be made of any suitable material, a wide variety of which are well-known and readily available. Representative examples of a suitable heat transfer materials include thermal epoxy, thermal grease and gap pads, suitable varieties of each of which are well-known by and readily available to persons skilled in the art.
The light engine housing fins can be of any desired shape, and can be made of any suitable material, a wide variety of which are well-known and readily available. Representative examples of materials out of which the light engine housing can be made are extruded aluminum, die cast aluminum, liquid crystal polymer, polyphenylene sulfide (PPS), thermoset bulk molded compound or other composite materials, which provide excellent heat transfer properties, which would assist in dissipating heat generated by the light engine, hi some embodiments, the light engine housing fins are integral with the light engine housing.
Any desired light diffuser can be employed, if desired, and persons skilled in the art are familiar with and have easy access to a variety of such diffusers. In some embodiments of the present inventive subject matter, a diffuser is mounted below the light engine housing, whereby light emitted from the light engine passes through the diffuser and is diffused prior to exiting the lighting device into the region that will be illuminated by the lighting device, e.g., into a room. Alternatively or additionally, the lighting devices according to the present inventive subject matter can include a reflective element. Any desired reflective element can be employed, and persons skilled in the art are familiar with and have easy access to a variety of such reflective elements. A representative example of a suitable material out of which the reflective element can be made is a material marketed by Furukawa (a Japanese corporation) under the trademark MCPET®. Li some embodiments of the present inventive subject matter, a reflective element is shaped and is positioned so as to cover at least part of the internal surface of the sidewall of the trim element. In some embodiments of the present inventive subject matter, a diffuser is provided and is mounted below the light engine housing, and a reflective element is provided and is mounted so as to cover the internal surface of the sidewall of the trim element (and/or the lighting device housing) below the diffuser. As noted above, in some embodiments of the present inventive subject matter, the lighting assembly further comprises a lighting device housing (to provide a lighting device).
The lighting device housing can be any desired shape. A representative shape for the lighting device housing is hollow substantially cylindrical, e.g., as in conventional "can" light fixtures. Other representative shapes include hollow conical (or substantially conical), hollow frustoconical (or substantially frustoconical) and hollow semi-elliptical (or substantially semi-elliptical), or any shape which includes one or more portions which are individually selected from among hollow conical (or substantially conical), hollow frustoconical (or substantially fhistoconical), hollow cylindrical (or substantially cylindrical) and hollow semi-elliptical (or substantially semi-elliptical). For example, housings which may be used as lighting device housings or light engine housings in practicing the present inventive subject matter, and light engines which may be used in practicing the present inventive subject matter are described in:
(1) U.S. Patent Application No. 60/752,753, filed on December 21, 2005, entitled "Lighting Device" (inventors: Gerald H. Negley, Antony Paul van de Ven and Neal Hunter; attorney docket number 931_002 PRO) and U.S. Patent Application No. 11/613,692, filed December 20, 2006, the entireties of which are hereby incorporated by reference;
(2) U.S. Patent Application No. 60/798,446, filed on May 5, 2006, entitled "Lighting Device" (inventor: Antony Paul van de Ven; attorney docket number 931_008 PRO) and U.S. Patent Application No. 11/743,754, filed May 3, 2007, the entireties of which are hereby incorporated by reference;
(3) U.S. Patent Application No. 60/845,429, filed on September 18, 2006, entitled "LIGHTING DEVICES, LIGHTING ASSEMBLIES, FIXTURES AND METHODS OF USING SAME" (inventor: Antony Paul van de Ven; attorney docket number 931 019 PRO), and U.S. Patent Application No. 11/856,421, filed September 17, 2007, the entireties of which are hereby incorporated by reference;
(4) U.S. Patent Application No. 60/846,222, filed on September 21, 2006, entitled "LIGHTING ASSEMBLIES, METHODS OF INSTALLING SAME, AND METHODS OF REPLACING LIGHTS" (inventors: Antony Paul van de Ven and Gerald H. Negley; attorney docket number 931_021 PRO), and U.S. Patent Application No. 11/859,048, filed September 21, 2007, the entireties of which are hereby incorporated by reference; (5) U.S. Patent Application No. 60/809,618, filed on May 31, 2006, entitled "LIGHTING DEVICE AND METHOD OF LIGHTING" (inventors: Gerald H. Negley, Antony Paul van de Ven and Thomas G. Coleman; attorney docket number 931_017 PRO) and U.S. Patent Application No. 11/755,153, filed May 30, 2007, the entireties of which are hereby incorporated by reference;
(6) U.S. Patent Application No. 60/858,881, filed on November 14, 2006, entitled "LIGHT ENGINE ASSEMBLIES" (inventors: Paul Kenneth Pickard and Gary David Trott; attorney docket number 931_036 PRO), the entirety of which is hereby incorporated by reference;
(7) U.S. Patent Application No. 60/859,013, filed on November 14, 2006, entitled
"LIGHTING ASSEMBLIES AND COMPONENTS FOR LIGHTING ASSEMBLIES" (inventors: Gary David Trott and Paul Kenneth Pickard; attorney docket number 931_037 PRO) and U.S. Patent Application No. 11/736,799, filed April 18, 2007, the entireties of which are hereby incorporated by reference;
(8) U.S. Patent Application No. 60/853,589, filed on October 23, 2006, entitled
"LIGHTING DEVICES AND METHODS OF INSTALLING LIGHT ENGINE HOUSINGS AND/OR TRIM ELEMENTS IN LIGHTING DEVICE HOUSINGS" (inventors: Gary David Tiott and Paul Kenneth Pickard; attorney docket number 931_038 PRO), the entirety of which is hereby incorporated by reference;
(9) U.S. Patent Application No. 60/861,901, filed on November 30, 2006, entitled
"LED DOWNLIGHT WITH ACCESSORY ATTACHMENT" (inventors: Gary David Trott, Paul Kenneth Pickard and Ed Adams; attorney docket number 931_044 PRO), the entirety of which is hereby incorporated by reference; and
(10) U.S. Patent Application No. 60/916,384, filed on May 7, 2007, entitled "LIGHT FIXTURES, LIGHTING DEVICES, AND COMPONENTS FOR THE SAME" (inventors: Paul Kenneth Pickard, Gary David Trott and Ed Adams; attorney docket number 931 055 PRO), the entirety of which is hereby incorporated by reference.
(3) U.S. Patent Application No. 60/809,959, filed on June 1, 2006, entitled "Lighting Device With Cooling" (inventors: Thomas G. Coleman, Gerald H. Negley and Antony Paul van de Ven attorney docket number 931_007 PRO) and U.S. Patent Application No.
11/626,483, filed January 24, 2007, the entireties of which are hereby incorporated by reference; (4) U.S. Patent Application No. 60/809,595, filed on May 31, 2006, entitled "LIGHTING DEVICE AND METHOD OF LIGHTING" (inventor: Gerald H. Negley; attorney docket number 931 018 PRO) and U.S. Patent Application No. 11/755,162, filed May 30, 2007, the entireties of which are hereby incorporated by reference;
(5) U.S. Patent Application No. 60/844,325, filed on September 13, 2006, entitled
"BOOST/FLYBACK POWER SUPPLY TOPOLOGY WITH LOW SIDE MOSFET CURRENT CONTROL" (inventor: Peter Jay Myers; attorney docket number 931_020 PRO), and U.S. Patent Application No. 11/854,744, filed September 13, 2007, the entireties of which are hereby incorporated by reference. The present inventive subject matter further relates to an illuminated enclosure (the volume of which can be illuminated uniformly or non-uniformly), comprising an enclosed space and at least one lighting device according to the present inventive subject matter, wherein the lighting device illuminates at least a portion of the enclosure (uniformly or non- uniformly). The present inventive subject matter is further directed to an illuminated surface, comprising a surface and at least one lighting device as described herein, wherein if the lighting device is illuminated, the lighting device would illuminate at least a portion of the surface.
The present inventive subject matter is further directed to an illuminated area, compiising at least one item, e.g., selected from among the group consisting of a structure, a swimming pool or spa, a room, a warehouse, an indicator, a road, a parking lot, a vehicle, signage, e.g., road signs, a billboard, a ship, a toy, a mirror, a vessel, an electronic device, a boat, an aircraft, a stadium, a computer, a remote audio device, a remote video device, a cell phone, a tree, a window, an LCD display, a cave, a tunnel, a yard, a lamppost, etc., having mounted therein or thereon at least one lighting device as described herein.
Embodiments in accordance with the present inventive subject matter are described herein with reference to cross-sectional (and/or plan view) illustrations that are schematic illustrations of idealized embodiments of the present inventive subject matter. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments of the present inventive subject matter should not be construed as limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing.
For example, a molded region illustrated or described as a rectangle will, typically, have rounded or curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region of a device and are not intended to limit the scope of the present inventive subject matter.
Figs. 1-4 depict a first embodiment of a lighting assembly in accordance with the present inventive subject matter. Referring to Fig. 1, there is shown a lighting assembly 10 which comprises a light engine assembly 11 and a room-side element 12 in contact with a portion of the light engine assembly 11. Referring to Fig. 2, the light engine assembly 11 comprises a trim element 13, a light engine housing 14 and a light engine 15. The trim element 13 defines a trim element internal space 16. The light engine housing 14 is positioned within the trim element internal space 16. The light engine housing 14 defines a light engine housing internal space 17. The light engine 15 is positioned within the light engine housing internal space 17 (and therefore is also within the trim element internal space
16) and comprises a plurality of LEDs 18. A thermal interface element 22 is positioned between the light engine housing 14 and the trim element 13
Fig. 5 is a partial sectional view of an alternative embodiment which includes a heat conducting element 21 positioned between a trim element 13 and a room-side element 12. Fig. 13 depicts an alternative light engine assembly 131, which includes a trim element 133, a light engine housing 134 and a light engine 135. The trim element 133 defines a trim element internal space 136. The light engine housing 134 is positioned within the trim element internal space 136. The light engine housing 134 defines a light engine housing internal space 137. The light engine 135 is positioned within the light engine housing internal space 137 (and therefore is also within the trim element internal space 136) and comprises a plurality of LEDs 138. The light engine assembly 131 further includes a thermal interface element 139 positioned between and in contact with each of an external surface of the light engine housing 134 and an internal surface of the trim element 133. Fig. 13 also depicts a plurality of light engine housing fins 140, each of which is: (1) in contact with an external surface of the light engine housing 134 (and integral with the light engine housing 134), (2) in contact with an internal surface of the trim element 133, (3) outside of the light engine housing internal space 137, and (4) inside the trim element internal space 136.
Fig. 13 also depicts a diffuser 141 which is positioned within the trim element internal space 136, the trim element 133 and the diffuser 141 together defining a trim element- diffuser internal space, and the light engine 135 being positioned within the trim element- diffuser internal space.
Fig. 6 is a sectional view of an alternative light engine assembly 61 which comprises a lighting device housing 64, the lighting device housing 64 defining a lighting device housing internal space within which the trim element 63 is positioned. Figs. 7-9 depict a second embodiment of a lighting assembly in accordance with the present inventive subject matter. Referring to Fig. 7, there is shown a lighting assembly 70 which comprises a light engine assembly 71 and a room-side element 72. Referring to Fig. 8, the light engine assembly 71 comprises a trim element 73 which comprises a flange portion 74. Fig. 9 is a sectional view of the room-side element 72, and it shows the arrangement of the heat dissipating fins 75. As shown in Fig. 9, the room-side element 72 comprises an annular region 76 and the heat dissipating fins 75. As shown in Fig. 9, the heat dissipating fins extend away from the annular region 76 such that any planar section which includes an axis of the trim element 73 (e.g., the section shown in Fig. 9) extends through the heat dissipating fins 75, and within any of such planar sections, the heat dissipating fins 75 extend radially from the annular region 76 and define different angles relative to a plane which is perpendicular to the axis of the trim element 73.
Some embodiments of the light engine assemblies according to the present inventive subject matter are designed to be installed in typical recessed housings (cans) available from maj or fixture manufacturers .
1. A lighting assembly, comprising: a light engine assembly; and a room-side element in contact with at least a portion of said light engine assembly, said light engine assembly comprising:
10. A lighting assembly as recited in claim 1 , wherein said room-side element comprises an annular element, said annular element having a plurality of concave portions in a first surface of said annular element which first surface is opposite to a second surface of said annular element, said second surface being in contact with said trim element, at least one solid state light emitter being positioned in each of at least some of said concave portions.
11. A lighting assembly as recited in claim 1, wherein: said room-side element comprises at least one solid state light emitter; and any planar section which includes an axis of said trim element includes at least a first heat dissipating fin which extends from said trim element in a direction substantially parallel to an axis of said trim element and at least two other heat dissipating fins which are substantially parallel with each other.
12. A lighting assembly as recited in claim 1, wherein: said light engine assembly further comprises a light engine housing positioned within said trim element internal space, said light engine housing defining a light engine housing internal space, and said light engine is positioned within said light engine housing internal space.
13. A lighting assembly as recited in claim 12, wherein an external surface of said light engine housing is in contact with an internal surface of said trim element.
15. A lighting assembly as recited in claim 12, wherein said light engine assembly further comprises a plurality of light engine housing fins, each of said light engine housing fins being: in contact with an external surface of said light engine housing, in contact with an internal surface of said trim element, outside of said light engine housing internal space, and inside said trim element internal space.
17. A lighting assembly as recited in claim 1, wherein: said lighting assembly further comprises at least a first light diffuser, said light diffuser is positioned within said trim element internal space, said trim element and said first light diffuser together define a trim element-diffuser internal space, and said light engine is positioned within said trim element-diffuser internal space.
18. A lighting assembly as recited in claim 1, wherein said lighting assembly further comprises a lighting device housing, said lighting device housing defining a lighting device housing internal space, at least a portion of said light engine assembly being positioned within said lighting device housing internal space.
19. A lighting assembly, comprising: a light engine assembly; and means for dissipating heat from said light engine assembly, said light engine assembly comprising:
23. A lighting assembly as recited in claim 19, wherein: said light engine assembly further comprises a light engine housing positioned within said trim element internal space, said light engine housing defining a light engine housing internal space, and said light engine is positioned within said light engine housing internal space.
24. A lighting assembly as recited in claim 23, wherein an external surface of said light engine housing is in contact with an internal surface of said trim element.
26. A lighting assembly as recited in claim 23, wherein said light engine assembly further comprises a plurality of light engine housing fins, each of said light engine housing fins being: in contact with an external surface of said light engine housing, in contact with an internal surface of said trim element, outside of said light engine housing internal space, and inside said trim element internal space.
28. A lighting assembly as recited in claim 19, wherein: said lighting assembly further comprises at least a first light diffuser, said light diffuser is positioned within said trim element internal space, said trim element and said first light diffuser together define a trim element-diffuser internal space, and said light engine is positioned within said trim element-diffuser internal space.
29. A lighting assembly as recited in claim 19, wherein said lighting assembly further comprises a lighting device housing, said lighting device housing defining a lighting device housing internal space, at least a portion of said light engine assembly being positioned within said lighting device housing internal space.
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