GB2473840A - Reflector lamp - Google Patents
Reflector lamp Download PDFInfo
- Publication number
- GB2473840A GB2473840A GB0916812A GB0916812A GB2473840A GB 2473840 A GB2473840 A GB 2473840A GB 0916812 A GB0916812 A GB 0916812A GB 0916812 A GB0916812 A GB 0916812A GB 2473840 A GB2473840 A GB 2473840A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflector
- lamp according
- lamp
- unit
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 7
- 206010014357 Electric shock Diseases 0.000 claims description 4
- 239000003989 dielectric material Substances 0.000 claims description 4
- 239000012811 non-conductive material Substances 0.000 claims description 3
- 238000002372 labelling Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000012780 transparent material Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- FPWNLURCHDRMHC-UHFFFAOYSA-N 4-chlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1 FPWNLURCHDRMHC-UHFFFAOYSA-N 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000003278 mimic effect Effects 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
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
- F21V7/0025—Combination of two or more reflectors for a single light source
-
- 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
-
- 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
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/233—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
-
- 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
- F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/10—Construction
-
- 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
- F21Y2101/00—Point-like light sources
-
- F21Y2101/02—
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
A reflector lamp has a number of reflectors 1, and a number of light sources 2 mounted within each reflector 1. Each reflector 1 includes an open output aperture through which the reflector 1 directs light to the exterior of the lamp, and each reflector 1 is dimensioned to restrict access by the user to the light source 2.
Description
Title -Improvements relating to Reflector Lamps This invention relates to reflector lamps, and in particular reflector lamps that include a plurality of LEDs.
Reflector lamps typically comprise a light source and a reflector for determining the direction and spread of the light output from the lamp. The reflectors may also be adapted to absorb particular frequencies of radiation, such as infra-red radiation, in order to provide the desired light output.
Conventional reflector lamps have a single aluminium reflector, with a light source mounted at its centre. It is also common for reflector lamps to include a window through which the light output from the reflector exits the lamp. In order to prevent a user accessing the light source, the window is usually defined by a plate of transparent material, such as glass, which extends across the outlet of the reflector.
A problem with many conventional reflector lamps, however, is that the plate of transparent material, through which the light output exits the lamp, causes the intensity of the light output to be significantly reduced.
There has now been devised an improved reflector lamp which overcomes or substantially mitigates the above-mentioned and/or other disadvantages
associated with the prior art.
According to the invention, there is provided a reflector lamp comprising one or more reflectors, and one or more light sources mounted within each reflector, each reflector including an open output aperture through which the reflector directs light to the exterior of the lamp, wherein each reflector is dimensioned to restrict access by the user to the light source.
The reflector lamp according to the invention is advantageous principally because each reflector is adapted to allow light to be output from the lamp through an open output aperture, rather than a plate of transparent material, but the reflector is nevertheless dimensioned to restrict access by the user to the light source.
Hence, the light output from the lamp is not reduced in intensity by any plate of transparent material, and the user's access to the light source is restricted to ensure safe use. Furthermore, in view of there being no need for the lamp to include any plate of transparent material, in addition to the reflector, manufacturing costs may be reduced.
The reflector lamp according to the invention is particularly advantageous in relation to lamps that include a plurality of light sources, each having a small size relative to conventional incandescent and halogen light sources, and hence is particularly advantageous in relation to lamps that include a plurality of LEDs.
Each reflector preferably has an electrically non-conductive surface. Indeed, the lamp preferably comprises a reflector unit including a plurality of reflectors, and the reflector unit preferably has an electrically non-conductive surface. Furthermore, the depth of each reflector, and in particular the depth of the reflector unit, is preferably sufficient to prevent a user from being given an electric shock by the lamp.
The lamp preferably includes a plurality of reflectors and one or more light sources mounted within each reflector. The provision of a plurality of reflectors enables each reflector to be sufficiently small to restrict access by the user to the associated light source, whilst enabling a sufficient intensity of light output.
Although more than one light source may be housed within each reflector, the number of light sources housed within each reflector must be sufficiently small to enable each reflector to be sufficiently small to restrict access by the user to those light sources.
Where the lamp includes a plurality of reflectors and one or more light sources mounted within each reflector, each reflector is preferably defined by a recess in a reflector unit. The surface of each recess preferably defines the reflective surface of the reflector. The reflective surface of each reflector may have the shape of an elliptical or circular paraboloid, commonly known as a parabolic reflector, or indeed any other shape that achieves the desired light output. In presently preferred embodiments, the reflective surface is formed of a dichroic material.
As discussed above, the reflective surface of each reflector is preferably electrically non-conductive, and is preferably formed of a dielectric material.
Indeed, the surface of the reflector unit is preferably electrically non-conductive, and is preferably formed of a dielectric material.
The reflector unit may include a component of electrically non-conductive material, which defines the one or more reflectors, that has an inherently reflective surface.
This material is preferably formable into at least part of the reflector unit, including the one or more reflectors, for example by vacuum moulding. A suitable material is the GORETM DRP® Diffuse Reflector (W. L. Gore & Associates).
Alternatively, the reflector unit comprises a substrate, which is preferably electrically non-conductive, upon which a layer of material is applied to form the reflective surface of each reflector. This layer of material is preferably formed of a non-conductive material, such as a dielectric material. This layer of material may be applied as a coating, for example to a glass substrate. Alternatively, this layer of material may be applied as a label during injection moulding of a plastics substrate, for example by in-mould labelling or insert moulding, which involve locating the label within the mould prior to injection moulding the substrate. A suitable material for application as a label is the GORETM DRP® Diffuse Reflector (W. L. Gore & Associates).
The lamp preferably also includes a retainer that is adapted to connect the reflector unit to the remainder of the lamp, such as the lamp housing. The retainer is preferably formed of a less expensive material than the reflector unit, such as a plastics material.
The depth of the reflector unit is preferably substantially the same as the depth of each reflector, in order to minimise the size of the lamp. In addition, the depth of the reflector unit is preferably sufficiently shallow to enable a drive circuit for the one or more light sources to be accommodated behind reflector unit in a lamp housing, but sufficiently deep to prevent any risk of electric shock to a user from the lamp.
As discussed above, the present invention is particularly advantageous in relation to lamps that include a plurality of LED5. Hence, the one or more light sources mounted within each reflector are preferably LEDs. Each reflector preferably has an opening within which the one or more light sources are housed. In particular, in presently preferred embodiments, the one or more light sources for each reflector are mounted to a PCB within the lamp, and the one or more light sources project through the opening into the interior of the reflector.
Each reflector includes an open output aperture through which the reflector directs light to the exterior of the lamp. By "open" is meant that the output aperture provides a direct path from the reflective surface of the reflector, through atmospheric air, to the exterior of the lamp. The output aperture preferably extends across the entire extent of one end of the reflector.
Each reflector is dimensioned to restrict access by the user to the light source. In presently preferred embodiments, this is achieved by selecting dimensions for the each output aperture that are sufficiently small to prevent a user touching the light source with a finger. The selected dimensions will depend upon the location of the one or more light sources within the reflector, and also the depth of the reflector.
However, each output aperture will typically have a maximum dimension, or diameter where the aperture is circular, that is less than 10mm, for example in the range of 5-10mm.
The reflector lamp according to the invention may be any of a range of different types of lamp, but are particularly suitable for use as a downlight, which is adapted to be connected to a light fitting within a recess, such that the lamp is housed within the recess. The lamp preferably includes a lamp housing to which the reflector unit is mounted, and within which the light sources and associated drive circuit is housed. The lamp preferably also includes a suitable electrical connection, for connection of the lamp to a suitable power supply. In particular, the lamp preferably includes an electrical connector adapted for connection to a mains supply, and a drive circuit for the one or more light sources adapted to receive power from a mains supply. Examples of suitable drive circuits are described in GB 2449616 B. According to a further aspect of the invention, there is provided a lighting system comprising a reflector lamp as described above.
A preferred embodiment of the invention will now be described in greater detail, by way of illustration only, with reference to the accompanying drawings, in which Figure 1 is a perspective view of a reflector lamp according to the invention; Figure 2 is a cross-sectional view of the reflector lamp; Figure 3 is a front perspective view of a multi parabolic reflector unit and a retainer that form part of the reflector lamp; Figure 4 is a rear perspective view of the multi parabolic reflector unit and retainer; Figure 5 is a perspective view of the reflector unit; and Figure 6 is a perspective view of the retainer.
The reflector lamp shown in the drawings is a GU1O type lamp, which includes the following components: 1 Multi parabolic reflector unit 2 LEDs 3 LED PCBs 4 Heat sink Drive circuitry 6 Outer case 7 Retainer 8 Isolation sheets 9 Electrical connectors The reflector unit 1 comprises an array of parabolic reflectors, each including an open outlet aperture at one end, and a smaller opening at the other end through which an LED 2 extends into the interior of the reflector. Each reflector is identical, and intended to mimic the light output of a GUi 0 halogen lamp.
The reflector unit 1 comprises a glass disc substrate, including a plurality of identical recesses, which each define a reflector. A dichroic, dielectric coating has been applied to the entire external surface of the substrate. This coating is electrically non-conductive, and defines the reflective surfaces of the reflectors.
The reflector unit 1 does not include any cover over the open outlet apertures, such that the light emitted by the LED5 2 and associated reflectors passes directly through atmospheric air to the exterior of the lamp.
The reflector unit 1 is mounted within the retainer 7, which is annular in shape and is formed of plastics material. The retainer 7 connects the reflector unit 1 to one end of the outer case 6 of the lamp. At the other end of the outer case 6, electrical connectors 9 are provided that are adapted for connection to a conventional light fitting fora GU1O type lamp.
Each LED 2 is mounted to a PCB 3, adjacent to the internal surface of the reflector unit 1. Furthermore, each PCB 3 is connected to the drive circuitry 5, which receives power from the mains supply via the electrical connectors 9, and converts the received power into a form suitable for driving the LEDs 2. In addition, the lamp includes a heat sink 4, with the LED PCB5 3 each being separated from the heat sink 4 by a suitable isolation sheet 8.
The reflector lamp is advantageous principally because each reflector is adapted to allow light to be output from the lamp through an open output aperture, rather than a plate of transparent material, but each reflector is nevertheless dimensioned to prevent the user touching the LEDs 2 during normal use. Hence, the light output from the lamp is not reduced in intensity by any plate of transparent material, and the user's access to the LEDs 2 is restricted to ensure safe use. Furthermore, in view of there being no need for the lamp to include any plate of transparent material, in addition to the reflectors, manufacturing costs may be reduced.
Claims (21)
- Claims 1. A reflector lamp comprising one or more reflectors, and one or more light sources mounted within each reflector, each reflector including an open output aperture through which the reflector directs light to the exterior of the lamp, wherein each reflector is dimensioned to restrict access by the user to the light source.
- 2. A reflector lamp according to Claim 1, wherein the lamp includes a plurality of reflectors and one or more light sources mounted within each reflector.
- 3. A reflector lamp according to Claim 2, wherein each reflector is defined by a recess in a reflector unit, and the surface of each recess defines the reflective surface of the reflector.
- 4. A reflector lamp according to any preceding claim, wherein each reflector has an electrically non-conductive surface.
- 5. A reflector lamp according to Claim 4, wherein the lamp comprises a reflector unit including a plurality of reflectors, and the reflector unit has an electrically non-conductive surface.
- 6. A reflector lamp according to Claim 5, wherein the depth of the reflector unit is sufficient to prevent a user from being given an electric shock by the lamp.
- 7. A reflector lamp according to any preceding claim, wherein the reflective surface of each reflector is formed of a dielectric material.
- 8. A reflector lamp according to any preceding claim, wherein the reflective surface of each reflector is formed of a dichroic material.
- 9. A reflector lamp according to any preceding claim, wherein the lamp comprises a reflector unit that defines the one or more reflectors.
- 10. A reflector lamp according to Claim 9, wherein the reflector unit comprises a substrate upon which a layer of material is applied to form the reflective surface of each reflector.
- 11. A reflector lamp according to Claim 10, wherein the layer of material is formed of a non-conductive material.
- 12. A reflector lamp as claimed in any one or Claims 9 to 11, wherein the reflector unit comprises an injection rnoulded part having an electrically non-conductive, reflective layer formed by IML (in-mould labelling).
- 13. A reflector lamp according to Claim 9, wherein the reflector unit includes an electrically non-conductive part, which defines the one or more reflectors, that has an inherently reflective surface.
- 14. A reflector lamp as claimed in Claim 9, wherein the reflector unit comprises a vacuum formed part, formed from an electrically non-conductive, reflective material.
- 15. A reflector lamp according to any one of Claims 9 to 14, wherein the depth of the reflector unit is sufficiently shallow to enable a drive circuit for the one or more light sources to be accommodated behind the reflector unit in a lamp housing, but sufficiently deep to prevent any risk of electric shock to a user.
- 16. A reflector lamp according to any preceding claim, wherein the one or more light sources mounted within each reflector are LEDs.
- 17. A reflector lamp according to any preceding claim, wherein each reflector is dimensioned to restrict access by the user to the light source by selecting dimensions for the each output aperture that are sufficiently small to prevent a user touching the light source with a finger.
- 18. A reflector lamp according to Claim 17, wherein each output aperture has a maximum dimension, or diameter where the aperture is circular, that is less than 10mm.
- 19. A reflector lamp according to Claim 18, wherein the maximum dimension or diameter is in the range of 5-10mm.
- 20. A reflector lamp according to any preceding claim, wherein the lamp includes an electrical connector adapted for connection to a mains supply, and a drive circuit for the one or more light sources adapted to receive power from a mains supply.
- 21. A lighting system comprising a reflector lamp according to any preceding claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0916812A GB2473840A (en) | 2009-09-24 | 2009-09-24 | Reflector lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0916812A GB2473840A (en) | 2009-09-24 | 2009-09-24 | Reflector lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0916812D0 GB0916812D0 (en) | 2009-11-04 |
| GB2473840A true GB2473840A (en) | 2011-03-30 |
Family
ID=41327554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0916812A Withdrawn GB2473840A (en) | 2009-09-24 | 2009-09-24 | Reflector lamp |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2473840A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013015862A1 (en) * | 2011-07-22 | 2013-01-31 | Guardian Industries Corp. | Improved led lighting systems and/or methods of making the same |
| US8540394B2 (en) | 2011-07-22 | 2013-09-24 | Guardian Industries Corp. | Collimating lenses for LED lighting systems, LED lighting systems including collimating lenses, and/or methods of making the same |
| US8742655B2 (en) | 2011-07-22 | 2014-06-03 | Guardian Industries Corp. | LED lighting systems with phosphor subassemblies, and/or methods of making the same |
| CN105526520A (en) * | 2014-09-30 | 2016-04-27 | 海洋王照明科技股份有限公司 | Large-power all-around type floodlighting LED (light-emitting diode) module and LED lamp |
| US9845943B2 (en) | 2011-07-22 | 2017-12-19 | Guardian Glass, LLC | Heat management subsystems for LED lighting systems, LED lighting systems including heat management subsystems, and/or methods of making the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2056016A1 (en) * | 2006-08-25 | 2009-05-06 | The Furukawa Electric Co., Ltd. | Illumination device |
-
2009
- 2009-09-24 GB GB0916812A patent/GB2473840A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2056016A1 (en) * | 2006-08-25 | 2009-05-06 | The Furukawa Electric Co., Ltd. | Illumination device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013015862A1 (en) * | 2011-07-22 | 2013-01-31 | Guardian Industries Corp. | Improved led lighting systems and/or methods of making the same |
| US8540394B2 (en) | 2011-07-22 | 2013-09-24 | Guardian Industries Corp. | Collimating lenses for LED lighting systems, LED lighting systems including collimating lenses, and/or methods of making the same |
| CN103782384A (en) * | 2011-07-22 | 2014-05-07 | 葛迪恩实业公司 | Improved light-emitting diode lighting system and/or method of manufacturing the same |
| US8742655B2 (en) | 2011-07-22 | 2014-06-03 | Guardian Industries Corp. | LED lighting systems with phosphor subassemblies, and/or methods of making the same |
| JP2014523103A (en) * | 2011-07-22 | 2014-09-08 | ガーディアン・インダストリーズ・コーポレーション | Improved LED lighting system and / or method of manufacturing the same |
| US8992045B2 (en) | 2011-07-22 | 2015-03-31 | Guardian Industries Corp. | LED lighting systems and/or methods of making the same |
| US9450162B2 (en) | 2011-07-22 | 2016-09-20 | Guardian Industries Corp. | LED lighting systems with phosphor subassemblies, and/or methods of making the same |
| US9845943B2 (en) | 2011-07-22 | 2017-12-19 | Guardian Glass, LLC | Heat management subsystems for LED lighting systems, LED lighting systems including heat management subsystems, and/or methods of making the same |
| CN105526520A (en) * | 2014-09-30 | 2016-04-27 | 海洋王照明科技股份有限公司 | Large-power all-around type floodlighting LED (light-emitting diode) module and LED lamp |
| CN105526520B (en) * | 2014-09-30 | 2018-09-14 | 海洋王照明科技股份有限公司 | High-power ring type floodlight LED module and LED lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0916812D0 (en) | 2009-11-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |