Source: https://patents.google.com/patent/WO2008067447A1/en
Timestamp: 2019-03-22 21:55:34
Document Index: 239103388

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

WO2008067447A1 - Self-ballasted solid state lighting devices - Google Patents
WO2008067447A1
WO2008067447A1 PCT/US2007/085904 US2007085904W WO2008067447A1 WO 2008067447 A1 WO2008067447 A1 WO 2008067447A1 US 2007085904 W US2007085904 W US 2007085904W WO 2008067447 A1 WO2008067447 A1 WO 2008067447A1
PCT/US2007/085904
2007-11-29 Application filed by Cree Led Lighting Solutions, Inc. filed Critical Cree Led Lighting Solutions, Inc.
2008-06-05 Publication of WO2008067447A1 publication Critical patent/WO2008067447A1/en
A lighting device (10), comprising a light engine housing (11), a light engine (18) comprising one or more solid state light emitters (38), a diffuser (49) and an energy forwarding element (40) which receives AC voltage and supplies power to the light engine (18). The light engine housing (11) comprises an electrical connection region (16) which is engageable with an electricity supply device (17). The light engine housing (11) comprises a first compartment (30), in which the light engine (19) is positioned and a second compartment (29). The light engine housing comprises a flange region (36). The first compartment (30) has an opening (20) which is covered by the diffuser. The lighting device can be mounted such the only elements which are visible from a room are the flange region (36), a front side (23) of the diffuser and any portion of the first compartment (30) which is between the opening (20) and the open end (19) of the light engine housing. The light engine housing (11) can comprise heat-dissipating fins (50).
This application claims the benefit of U.S. Provisional Patent Application No. 60/861,824, filed November 30, 2006, the entirety of which is incorporated herein by reference.
A large proportion (some estimates are as high as twenty-five percent) of the electricity generated in the United States each year goes to lighting. Accordingly, there is an ongoing need to provide lighting which is more energy-efficient. It is well-known that incandescent light bulbs are very energy-inefficient light sources - about ninety percent of the electricity they consume is released as heat rather than light. Fluorescent light bulbs are more efficient than incandescent light bulbs (by a factor of about 10) but are still less efficient than solid state light emitters, such as light emitting diodes. hi addition, as compared to the normal lifetimes of solid state light emitters, e.g., light emitting diodes, incandescent light bulbs have relatively short lifetimes, i.e., typically about 750-1000 hours, hi comparison, light emitting diodes, for example, have typical lifetimes between 50,000 and 70,000 hours. Fluorescent bulbs have longer lifetimes (e.g., 10,000 - 20,000 hours) than incandescent lights, but provide less favorable color reproduction.
Accordingly, for these and other reasons, 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 light emitting diodes (or other solid state light emitters) which are improved, e.g., with respect to energy efficiency, color rendering index (CRI Ra), contrast, efficacy (lm/W), low cost, and/or duration of service. hi addition, there is an ongoing need to make lighting devices, including lighting device comprising conventional light emitters (e.g., incandescent light bulbs, fluorescent light bulbs, etc) and/or solid state light emitters, in which the components of the lighting devices are held together more securely, in which the lighting device dissipates heat more effectively, and/or which are more energy efficient.
Such a solution is provided by the devices according to the present inventive subject matter, whereby the user may either choose the solid state light emitter-based fixture at the time of construction or for use with an existing installation, e.g., of traditional downlight "cans." The present inventive subject matter provides a "self-ballasted" solid state light emitter lighting device. As such, a homeowner, building owner or contractor need only remove the existing lamp and trim from a traditional recessed downlight and replace them with a device according to the present inventive subject matter in order to reduce energy consumption, upgrade the fixture aesthetics, and improve light distribution. In function, the devices according to the present inventive subject matter act similarly to a self-ballasted compact fluorescent lamp, encouraging easy adoption by allowing the consumer to retain the existing traditional fixture structure and still attain the benefits of the new technology.
Some devices according to the present inventive subject matter require integration of the "trim" structure to transfer energy from the heat-sensitive solid state light emitters to the outside environment; and thereby such devices provide for mechanical retention independent of the trim, as the traditional trim (which typically holds itself and the lamp in the can) cannot be reused with the device. This can be accomplished, e.g., through the integral Edison connector to the socket, if the Edison socket is hard-mounted in the traditional can fixture, or with a completely independent mechanical structure that does not rely at all on the Edison socket for structural support (see, e.g., Figs. 1-5).
According to a first aspect of the present inventive subject matter, there is provided a lighting device, comprising: a light engine housing; a light engine; a diffuser; and an energy forwarding element, the light engine housing comprising an electrical connection region, the electrical connection region being engageable with an electricity supply device, the light engine housing comprising a first compartment and a second compartment, the light engine housing comprising a plurality of heat-dissipating fins, the light engine housing comprising a flange region which surrounds an open end of the light engine housing, the light engine being positioned within the first compartment of the light engine housing, the light engine comprising at least a first solid state light emitter, the energy forwarding element being positioned within the second compartment of the light engine housing, at least a first region of the energy forwarding element being electrically connected to the electrical connection region, at least a second region of the energy forwarding element being electrically connected to the light engine, the energy forwarding element comprising circuitry which, if power of an AC voltage is supplied to the first region of the energy forwarding element, supplies energy to the light engine in a form such that the first solid state light emitter will emit light, the first compartment having an opening which is covered by the diffuser, whereby at least a portion of light emitted by the first solid state light emitter which travels toward the opening will pass through the diffuser and then through the open end of the light engine housing to exit from the light engine housing, whereby if the lighting device is mounted in a hole in a structure such that the flange region is on a first side of the structure and at least a portion of a back side of the flange region is in contact with a region of the first side of the structure which surrounds the hole, and a remainder of the light engine housing is on an opposite side of the hole relative to the flange region, the only elements which would be visible within a field defined by an outer periphery of the flange portion of the light engine housing from a vantage point which is in a region which is to the first side of the structure would be a front side of the flange region, a front side of the diffuser and any portion of the first compartment which is between the opening and the open end.
According to a second aspect of the present inventive subject matter, there is provided a lighting device, comprising: a light engine housing; a light engine; a diffuser; and an energy forwarding element, the light engine housing comprising an electrical connection region, the electrical connection region being engageable with an electricity supply device, the light engine housing comprising a first compartment and a second compartment, the light engine housing comprising a flange region which surrounds an open end of the light engine housing, the light engine being positioned within the first compartment of the light engine housing, the light engine comprising at least a first solid state light emitter, the energy forwarding element being positioned within the second compartment of the light engine housing, at least a first region of the energy forwarding element being electrically connected to the electrical connection region, at least a second region of the energy forwarding element being electrically connected to the light engine, the energy forwarding element comprising circuitry which, if power of an AC voltage is supplied to the first region of the energy forwarding element, supplies energy to the light engine in a form such that the first solid state light emitter will emit light, an entirety of the energy forwarding element being within a space whose boundaries would be defined by points through which a periphery of the open end would pass if the periphery of the open end were moved, in a direction parallel to a shortest line segment connecting the electrical connection region and the diffuser, from the open end to a position where the periphery of the open end would surround the electrical connection region, the first compartment having an opening which is covered by the diffuser, whereby at least a portion of light emitted by the first solid state light emitter which travels toward the opening will pass through the diffuser and then through the open end of the light engine housing to exit from the light engine housing, whereby if the lighting device is mounted in a hole in a structure such that the flange region is on a first side of the structure and at least a portion of a back side of the flange region is in contact with a region of the first side of the structure which surrounds the hole, and a remainder of the light engine housing is on an opposite side of the hole relative to the flange region, the only elements which would be visible within a field defined by an outer periphery of the flange portion of the light engine housing from a vantage point which is in a region which is to the first side of the structure would be a front side of the flange region, a front side of the diffuser and any portion of the first compartment which is between the opening and the open end.
According to a third aspect of the present inventive subject matter, there is provided a lighting device, comprising: a light engine housing; means for generating light; a diffuser; and means for forwarding energy, the light engine housing comprising means for receiving AC voltage, the light engine housing comprising a first compartment and a second compartment, the light engine housing comprising a plurality of heat-dissipating fins, the light engine housing comprising a flange region which surrounds an open end of the light engine housing, the means for generating light being positioned within the first compartment of the light engine housing, the means for generating light comprising at least a first solid state light emitter, the means for forwarding energy being positioned within the second compartment of the light engine housing, the means for forwarding energy being electrically connected to the means for receiving AC voltage, the means for forwarding energy being electrically connected to the means for generating light, the means for forwarding energy comprising means for converting power of an AC voltage to a form which, if supplied to the means for generating light, will cause the means for generating light to emit light, the first compartment having an opening which is covered by the diffuser, whereby at least a portion of light emitted by the first solid state light emitter which travels toward the opening will pass through the diffuser and then through the open end of the light engine housing to exit from the light engine housing, whereby if the lighting device is mounted in a hole in a structure such that the flange region is on a first side of the structure and at least a portion of a back side of the flange region is in contact with a region of the first side of the structure which surrounds the hole, and a remainder of the light engine housing is on an opposite side of the hole relative to the flange region, the only elements which would be visible within a field defined by an outer periphery of the flange portion of the light engine housing from a vantage point which is in a region which is to the first side of the structure would be a front side of the flange region, a front side of the diffuser and any portion of the first compartment which is between the opening and the open end.
Furthermore, relative terms, such as "lower" or "bottom" and "upper" or "top," maybe used herein to describe one element's relationship to another elements as illustrated in the Figures. Such relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. For example, if the device in the Figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. The exemplary term "lower", can therefore, encompass both an orientation of "lower" and "upper," depending on the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. The exemplary terms "below" or "beneath" can, therefore, encompass both an orientation of above and below.
A lumiphor emits light when it becomes excited. The expression "excited" 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).
As used herein, the term "substantially," e.g., in the expressions "substantially cylindrical" or "substantially circular" means at least about 90 % correspondence with the feature recited, e.g.,
the expression "substantially cylindrical", as used herein, means that at least 90% of the points in the surface which is characterized as being substantially cylindrical are located on one of or between a pair of imaginary cylindrical structures which are spaced from each other by a distance of not more than 10 % of their largest dimension; and the expression "substantially circular" means that a circle can be drawn having the formula x2 + y2 = 1, where imaginary axes can be drawn at a location where the y coordinate of each point on the structure is within 0.90 to 1.10 times the value obtained by inserting the x coordinate of such point into such formula.
(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;
Recessed downlights are generally available in multiple lamp configurations and types: Incandescent-based fixtures, which use an Edison type socket (A, BR, and PAR type lamps), fluorescent fixtures using Compact Florescent lamps, and even HID lamps using miniature metal halide lamps. Incandescent fixtures run their lamps directly offline (e.g., roughly 120 VAC) voltage, whereas florescent and HID fixtures require an external ballast to convert line voltage and strike/drive the lamps. The most common fixtures historically and currently sold in the marketplace are incandescent fixtures.
Recessed downlights can use solid state light sources (e.g., light emitting diodes ("LEDs")) advantageously, if properly designed and implemented. Well-designed recessed downlights based on LED technology can provide similar light output to 65W incandescent fixtures, with high color rendering and high efficacy. Compared to fluorescent-based fixtures, an LED fixture provides "instant on" capability, significantly improved color rendering, better light distribution, an order of magnitude longer life, similar initial cost, and improved fixture appearance.
A number of additional structures can also be included in the lighting devices according to the present inventive subject matter. For example, the lighting devices according to the present inventive subject matter can further include a diffuser. Any desired diffuser can be employed, and persons skilled in the art are familiar with and have easy access to a variety of such diffusers. hi some embodiments of the present inventive subject matter, a diffuser is mounted to the lighting device housing 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®. hi 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 lighting device housing.
The (or each) lumiphor can, independently, further comprise any of a number of well- known additives, e.g., diffusers, scatterers, tints, etc.
(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.
(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; (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; and
(9) 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 931J312 PRO) and U.S. Patent Application No. 11/736,761, filed April 18, 2007, 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 931J312 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;
(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.
(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;
(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; and
(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 light engine housing 11 comprises a plurality of heat-dissipating fins 50 (see Fig
The lighting device 10 is mounted in a hole 21 in a structure 22 (in this embodiment, a ceiling) such that the flange region 36 is on a first side 24 of the structure 22 and at least a portion of a back side 23 of the flange region 36 is in contact with a region of the first side 24 of the structure which surrounds the hole 21, and a remainder of the light engine housing 11 is on an opposite side of the hole 21 relative to the flange region 36, the only elements which would be visible within a field defined by an outer periphery of the flange portion 36 of the light engine housing 11 from a vantage point which is in a region which is to the first side of the structure 24 would be a front side 25 of the flange region 36, a front side 26 of the diffuser 49 and any portion of the first compartment which is between the opening 20 and the open end 19. In the embodiment shown in Figs. 1-3, the diffuser is mounted above the open end of the light engine housing, so there is a portion of the first compartment which is between the opening 20 and the open end 19. In some embodiments according to the present inventive subject matter, the diffuser is mounted at the open end of the light engine housing - in such embodiments, there is no portion of the first compartment which is between the opening 20 and the open end 19.
Fig 3 is a perspective view of an upper portion of the light engine housing (which can be attached with screws to a lower portion of the light engine housing 11, and to which a cover element can be attached with screws to form the light engine housing 11) showing the second compartment 29.
Fig, 1 shows the first embodiment in cross-section. The sidewalls of the cavity between the solid state light emitters 38 and the diffuser 49 are either coated with a high reflectivity paint or powder coat, or are covered with a high reflectivity film or material which could be diffuse or specular. The diffuser acts to mix the various colors of LEDs (where different color are employed) into a uniform color from all viewing angles, and/or to provide obscuration of the individual points of light generated by the plurality of LEDs. AC power enters the device through the Edison socket (or another appropriate 2/3 pin connector, or wiring harness in this same location). The AC power is converted to DC by the power supply PCB located in the first compartment 29. The top plate (where the retention clips are mounted), the upper housing, and the Power Supply PCB for an enclosure for the AC line voltage minimize or eliminate shock and fire hazards.
The DC voltage is then passed to the LED PCB via pins or wires, through an opening in the bottom of the upper compartment 29. In the instance that this DC voltage exceeds "Class 2", or is greater than 60V, a separate shock and flame barrier is required for the DC voltage as well. This can be provided by the LED PCB itself, if the traces carrying the "Class 1" voltage are only present on the upper housing side of the PCB, and the PCB itself is flame rated (like FR4.) In the instance that high voltage carrying traces are present on both sides of the board, a separate flame barrier can be provided between the LEDs and the LED PCB . This could be a laminated blank PCB substrate (like FR4) to insulate the traces, or it could be a flame rated insulating film like Formex®. On top of this flame and shock insulator (and still underneath the LEDs), there can be provided a highly reflective film, coating or material. This material insures that any light escaping the LED packages from the rear is not wasted but is reflected back into the optical cavity between the LEDs and diffuser. The device can, if desired, further include a conformal coating layer, which can be positioned in any suitable location, e.g., underneath the Formex® (if provided) and/or underneath the MCPET® (if provided).
In this embodiment, the diffuser is designed in such a manner to promote effective color mixing, depixelization, and high optical efficiency, and the diffuser can be attached via mechanical snap-fit to the lower housing in such a manner that it requires the device to be uninstalled (powered down) to remove it, and/or the diffuser (lens) can be permanently attached (i.e., removal would require breakage), e.g., by heat staking, suitable heat staking techniques being well-known in the art..
The viewable surface of the lower housing is designed in such a manner as to provide maximum surface area to the ambient environment while maintaining an acceptable aesthetic and high optical efficiency. The non- viewable surfaces of the both the lower housing and upper housing are designed to maximize surface area for heat transfer while maintaining manufacturability.
1. A lighting device, comprising: a light engine housing; a light engine; a diffuser; and an energy forwarding element, said light engine housing comprising an electrical connection region, said electrical connection region being engageable with an electricity supply device, said light engine housing comprising a first compartment and a second compartment, said light engine housing comprising a plurality of heat-dissipating fins, said light engine housing comprising a flange region which surrounds an open end of the light engine housing, said light engine being positioned within said first compartment of said light engine housing, said light engine comprising at least a first solid state light emitter, said energy forwarding element being positioned within said second compartment of said light engine housing, at least a first region of said energy forwarding element being electrically connected to said electrical connection region, at least a second region of said energy forwarding element being electrically connected to said light engine, said energy forwarding element comprising circuitry which, if power of an AC voltage is supplied to said first region of said energy forwarding element, supplies energy to said light engine in a form such that said first solid state light emitter will emit light, said first compartment having an opening which is covered by said diffuser, whereby at least a portion of light emitted by said first solid state light emitter which travels toward said opening will pass through said diffuser and then through said open end of said light engine housing to exit from said light engine housing, whereby if said lighting device is mounted in a hole in a structure such that said flange region is on a first side of said structure and at least a portion of a back side of said flange region is in contact with a region of said first side of said structure which surrounds said hole, and a remainder of said light engine housing is on an opposite side of said hole relative to said flange region, the only elements which would be visible within a field defined by an outer periphery of said flange portion of said light engine housing from a vantage point which is in a region which is to said first side of said structure would be a front side of said flange region, a front side of said diffuser and any portion of said first compartment which is between said opening and said open end.
2. A lighting device as recited in claim 1, wherein said electrical connection region is engageable in an Edison socket or comprises a GU24 base.
9. A lighting device, comprising: a light engine housing; a light engine; a diffuser; and an energy forwarding element, said light engine housing comprising an electrical connection region, said electrical connection region being engageable with an electricity supply device, said light engine housing comprising a first compartment and a second compartment, said light engine housing comprising a flange region which surrounds an open end of the light engine housing, said light engine being positioned within said first compartment of said light engine housing, said light engine comprising at least a first solid state light emitter, said energy forwarding element being positioned within said second compartment of said light engine housing, at least a first region of said energy forwarding element being electrically connected to said electrical connection region, at least a second region of said energy forwarding element being electrically connected to said light engine, said energy forwarding element comprising circuitry which, if power of an AC voltage is supplied to said first region of said energy forwarding element, supplies energy to said light engine in a form such that said first solid state light emitter will emit light, an entirety of said energy forwarding element being within a space whose boundaries would be defined by points through which a periphery of said open end would pass if said periphery of said open end were moved, in a direction parallel to a shortest line segment connecting said electrical connection region and said diffuser, from said open end to a position where said periphery of said open end would surround said electrical connection region, said first compartment having an opening which is covered by said diffuser, whereby at least a portion of light emitted by said first solid state light emitter which travels toward said opening will pass through said diffuser and then through said open end of said light engine housing to exit from said light engine housing, whereby if said lighting device is mounted in a hole in a structure such that said flange region is on a first side of said structure and at least a portion of a back side of said flange region is in contact with a region of said first side of said structure which surrounds said hole, and a remainder of said light engine housing is on an opposite side of said hole relative to said flange region, the only elements which would be visible within a field defined by an outer periphery of said flange portion of said light engine housing from a vantage point which is in a region which is to said first side of said structure would be a front side of said flange region, a front side of said diffuser and any portion of said first compartment which is between said opening and said open end.
10. A lighting device as recited in claim 9, wherein said first solid state light emitter comprises an LED.
17. A lighting device, comprising: a light engine housing; means for generating light; a diffuser; and means for forwarding energy, said light engine housing comprising means for receiving AC voltage, said light engine housing comprising a first compartment and a second compartment, said light engine housing comprising a plurality of heat-dissipating fins, said light engine housing comprising a flange region which surrounds an open end of the light engine housing, said means for generating light being positioned within said first compartment of said light engine housing, said means for generating light comprising at least a first solid state light emitter, said means for forwarding energy being positioned within said second compartment of said light engine housing, said means for forwarding energy being electrically connected to said means for receiving AC voltage, said means for forwarding energy being electrically connected to said means for generating light, said means for forwarding energy comprising means for converting power of an AC voltage to a form which, if supplied to said means for generating light, will cause said means for generating light to emit light, said first compartment having an opening which is covered by said diffuser, whereby at least a portion of light emitted by said first solid state light emitter which travels toward said opening will pass through said diffuser and then through said open end of said light engine housing to exit from said light engine housing, whereby if said lighting device is mounted in a hole in a structure such that said flange region is on a first side of said structure and at least a portion of a back side of said flange region is in contact with a region of said first side of said structure which surrounds said hole, and a remainder of said light engine housing is on an opposite side of said hole relative to said flange region, the only elements which would be visible within a field defined by an outer periphery of said flange portion of said light engine housing from a vantage point which is in a region which is to said first side of said structure would be a front side of said flange region, a front side of said diffuser and any portion of said first compartment which is between said opening and said open end.
18. A lighting device as recited in claim 17, wherein said means for receiving AC voltage is engageable in an Edison socket or comprises a GU24 base.
24. A lighting device as recited in claim 17, wherein said AC voltage is line voltage
PCT/US2007/085904 2006-11-30 2007-11-29 Self-ballasted solid state lighting devices WO2008067447A1 (en)
CN2007800437064A CN101790659B (en) 2006-11-30 2007-11-29 Self-ballasted solid state lighting devices
JP2009539477A JP5785361B2 (en) 2006-11-30 2007-11-29 Ballast built-in solid-state lighting device
EP07864896A EP2097669A1 (en) 2006-11-30 2007-11-29 Self-ballasted solid state lighting devices
WO2008067447A1 true WO2008067447A1 (en) 2008-06-05
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EP2543923A4 (en) * 2010-03-05 2014-03-26 Panasonic Corp Illumination appliance
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