WO2019016079A1 - Module d'éclairage - Google Patents

Module d'éclairage Download PDF

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Publication number
WO2019016079A1
WO2019016079A1 PCT/EP2018/069004 EP2018069004W WO2019016079A1 WO 2019016079 A1 WO2019016079 A1 WO 2019016079A1 EP 2018069004 W EP2018069004 W EP 2018069004W WO 2019016079 A1 WO2019016079 A1 WO 2019016079A1
Authority
WO
WIPO (PCT)
Prior art keywords
lighting module
leds
light
emitted
luminaire
Prior art date
Application number
PCT/EP2018/069004
Other languages
English (en)
Inventor
Ties Van Bommel
Anna Wilhelmina Maria WONDERGEM-DE BEST
Simon Jacobus Maria KUPPENS
Original Assignee
Philips Lighting Holding B.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Lighting Holding B.V. filed Critical Philips Lighting Holding B.V.
Publication of WO2019016079A1 publication Critical patent/WO2019016079A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/65—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction specially adapted for changing the characteristics or the distribution of the light, e.g. by adjustment of parts
    • 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
    • F21K9/232—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 an essentially omnidirectional light distribution, e.g. with a glass bulb
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0471—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor detecting the proximity, the presence or the movement of an object or a person
    • 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
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/30—Light sources with three-dimensionally disposed light-generating elements on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section

Definitions

  • the invention relates to a lighting module for use in a luminaire and a luminaire comprising such a lighting module.
  • Gas-discharge lamps are widely used for road and residential lighting, decorative floodlighting, commercial and industrial applications, and recreational sports facilities that are both indoor and outdoor.
  • Such lamps comprise a bright arc which emits light in an omnidirectional way and is placed in the optical center of a reflector of a luminaire, which collects and redirects the light to, for example, a road.
  • the high brightness property and the high lumen output of such lamps make them well suited for illuminating big outdoor areas, such as roadways, parking lots, and pavements.
  • LED lamps have a much more efficient lumen to power ratio than gas-discharge lamps, and have also a longer lifetime before the lamp needs replacing.
  • gas-discharge lamps are widely used in urban infrastructures, such as street lights, which would be costly to replace
  • the LED replacement should be capable of operating in the already existing luminaires. Therefore, the proposed LED replacements should be compatible with the existing luminaires, i.e. be compatible with the existing socket and mimic the omnidirectional light emission of the gas- discharge lamps such that the light emitted from a replacement LED lamp is reflected properly when the LED lamp is positioned in the optical center of the reflector of the luminaire.
  • each side of the hexagonally shaped heat sink comprises an LED light source.
  • the heat sink is made to be elongated, such that the light emitted by the LED lamp closely resembles the omnidirectional light of an arc lamp.
  • the heat sink of the LED lamp needs to be of considerable dimensions, such that the heat produced by the LEDs have sufficient surface area to dissipate from. This results in a spacious heat sink which may act as an obstacle for light being reflected by the reflector towards the light window of the reflector, thereby creating a shadowing effect, which results in a loss of light and thereby reduces the efficiency of the LED lamp.
  • the mounting sockets used for the gas-discharge lamps are not designed to take the final, mounted orientation of the lamp into consideration as gas-discharge lamps are mostly continuously rotationally symmetric about their longitudinal axis.
  • the surfaces of the heat sink may end up with a final, mounted position, wherein the surfaces of the heat sink are orientated in a non-optimal manner in relation to the reflector and the light window of the reflector.
  • a lamp having a driver circuit supplying power to LEDs, and a supplementary integrated sensor, detecting alignment and/or orientation of the lamp.
  • the driver circuit operates the LEDs and influence a spatial light output depending on the detected alignment and/or orientation of the lamp.
  • the driver circuit adjusts intensity of the light output and/or a maximum permissible intensity in a dimming operation.
  • JP 2011243512 shows a lighting device with an outer appearance of a hexagon.
  • the hexagon is provided with, for instance, six plane substrates each connected with the adjacent one.
  • a number of LEDs 3 are arrayed in adjacency on each flat plate face of the six flat substrates, with a light-emitting part of each LED exposed on the surface of the flat substrate.
  • a lighting module for use in a luminaire, the lighting module comprising a heat sink for dissipating thermal energy, which heat sink is polygonal in cross section, forming a number of surfaces corresponding to the polygonal shape of the heat sink, each surface extending in a longitudinal direction, where the longitudinal direction extends substantially perpendicularly to a plane of the cross section, i.e. at an angle of approximately 90 degrees to the plane of the cross section.
  • At least one row of LEDs is located on each of at least two of the surfaces, each row comprising at least two LEDs so that light may be emitted from each surface comprising a respective row of LEDs, wherein the LEDs are configured so that the lighting module, when connected to a power source, is configured to or can be set to emit less light from at least one of the surfaces than from at least one other of the surfaces.
  • the LEDs need not be provided by standard Light- emitting diodes, but may also be provided by other types of light emitting semi-conductor diodes, such as laser diodes.
  • a lighting module for replacing conventional gas-discharge lamps without modification of the associated luminaire and with improved efficiency is provided. Furthermore, the light distribution and light emission of the lighting module in the luminaire is optimized and rendered more efficient.
  • the problems relating to the heat sink shadowing the light reflected from the reflector are particularly troublesome for light emitted radially away from the lighting module in the direction away from a light window of the reflector, i.e. the opening from which light from the lighting module leaves the luminaire.
  • substantially towards the center, center line, or vertex of the luminaire will be reflected in an inefficient manner because the rays are reflected back onto the lighting module, thereby resulting in a shadowing effect.
  • By providing less or no current to, for example, the row of LEDs on the surface pointing towards the center, center line or vertex of a reflector of a luminaire when the lighting module is mounted in a luminaire, less light is lost by being reflected towards the lighting module, where light rays are blocked by the lighting module, while keeping substantially the same light output from the light exit window of the luminaire. Thereby energy may be saved, while keeping substantially the same light output from the light exit window of the luminaire.
  • the center, center line, or vertex of the reflector of the luminaire may be defined as the point, line, or area of the reflector, where light rays are reflected back substantially towards the optical center, focus, or focal point of the reflector.
  • the lighting module therefore blocks these light rays emitted towards the center, center line, or vertex of the reflector, when installed in the optical center, resulting in a shadowing effect.
  • the center, center line, or vertex of the reflector may be the point, line, or area where: the slope of the reflector shape substantially equals zero, a local maximum is, or the derivative in one or more points is zero.
  • the reflector may be substantially arc-shaped and/or have a substantially parabolic shape and/or a substantially semi-elliptical shape, specifically in a cross section, more specifically in a cross section taken along a longitudinally extending center line of the lighting module.
  • the reflector may have a paraboloid shape, specifically an elliptic paraboloid, a paraboloid of revolution, a circular paraboloid, or a hyperbolic paraboloid.
  • the reflector may also have other shapes that have cross-sections that are parabolic, such as a half cylinder or a cone.
  • the luminaire may comprise one or more reflectors, such that one or more lighting modules may be fitted in the luminaire.
  • the lighting module may be positioned substantially in an optical center, focus, or focal point of the reflector or luminaire or light fitting.
  • the lighting module of the invention will usually, when installed in the luminaire, be orientated such that one of the surfaces of the heat sink will be substantially parallel with the light exit window and facing away from the light exit window. Light emitted from this surface will be emitted radially away towards the vertex of the reflector.
  • the lighting module may be set such that less light may be emitted from at least one surface than from at least one other of said surfaces when connected to a power source.
  • the lighting module may be configured to emit less light from at least one surface than from at least one other surface before being installed in a luminaire, but may also be set to emit less light from at least one surface than from at least one other surface, when being installed in a luminaire and connected to a power source.
  • the at least one surface from which less light is emitted may emit less than or equal to 95 %, 90 %, 80 %, 70 %, 60 %, 50 %, 40 %, 30 %, 20 %, 10 %, 5 % down to 0 % of the light emitted from at least one other of said surfaces.
  • the amount of light emitted from an LED, a row of LEDs or a surface of the heat sink may be measured by measuring the light flux, the lumen output, the luminous efficacy, or the luminous efficiency of the LED.
  • This may be done by covering or turning off the LED, the row of LEDs or the surface(s) of the heat sink that are not to be measured, such that substantially no light is emitted from them, and leaving the LED, the row(s) of LEDs or the surface(s) of the heat sink that are to be measured, uncovered.
  • two, three, four, five, six, or all surfaces of the heat sink may be configured to or may be set to emit substantially the same amount of light.
  • the term "same amount of light” may be defined as the amount of light emitted individually by each surface, and may vary within the uncertainty range for emitted light of each LED. The uncertainty range for emitted light may vary for each LED. This may be less than +- 5 %, +- 10 %, +- 20 %, +- 30 %, or +- 40 %.
  • the lighting module may comprise a base, a plug part, support part or fitting part, which may fit into a socket of a luminaire or light fitting, providing power to the lighting module and supporting or fixing it in the luminaire or light fitting.
  • the plug part may be provided with an external thread, fitting an internal thread of the luminaire socket, especially in the situation where the lighting module replaces an existing arc lamp.
  • the plug part may alternatively be provided with pins fitting into the luminaire socket.
  • the lighting module may further comprise a PCB (Printed Circuit Board), an LED driver, and other members that are usual in lighting modules.
  • the heat sink is hexagonal in cross section so as to comprise six surfaces, wherein at least one row of LEDs, each row comprising at least two LEDs, are located on each of five of the surfaces, and wherein the remaining of the surfaces comprises no LEDs, so that, when connected to a power source, no light is emitted from the latter surface.
  • the heat sink is hexagonal in cross section so as to comprise six surfaces, wherein at least one row of LEDs, each row comprising at least two LEDs, are located on each of the six surfaces, and wherein the lighting module is configured so or can be set so that, when connected to a power source, less light is emitted from one of the surfaces than from the other of the surfaces.
  • the heat sink may have a substantially cylindrical shape.
  • Cylindrical may be defined as the heat sink having two parallel base sides or ends, where a cross section of the heat sink may be circular, elliptical or polygonal, such as triangular or square, the two base sides or ends being joined by a side surface extending substantially straight in the
  • the side surface may be curved or round or may comprise a plurality of surface parts, where the surface parts may each be planar, straight, curved, and/or extend in a zig-zag shape.
  • the heat sink may work as a heat exchanger in order to dissipate heat generated by the LEDs, whereby a temperature of the LEDs may be moderated.
  • One or more of the surfaces of the heat sink may be configured to emit less light than one or more other surfaces of the heat sink.
  • the number of LEDs per row and/or surface may be varied, and may be at least two, three, four, five, six, seven, eight, ten, fifteen, twenty, fifty, eighty, a hundred or more, whereby the light output may be varied.
  • the number of LEDs per row and/or surface may similarly be less than three, four, five, six, seven, eight, ten, fifteen, twenty, fifty, eighty, or a hundred.
  • the number of LEDs per row and/or surface is two to forty, three to thirty, four to twenty, or six to ten.
  • the term "rows of LEDs" may be defined as at least two LEDs that may be aligned along a direction parallel to a longitudinal axis of the lighting module.
  • the rows of LEDs may also have LEDs that are not necessarily strictly aligned with each other, such that they are shifted with respect to each other, in a direction perpendicular to the longitudinal axis of the lighting module.
  • a reflector in a luminaire in which the LED may be positioned, may reflect light that is emitted in other directions than directions towards a light exit window of the luminaire, such that this light may be reflected in the direction of the light exit window.
  • the luminaire may be a luminaire for gas-discharge lamps, but may alternatively also be adapted for LEDs, such that some components of the lighting module may be omitted, for example a driver.
  • the term "located on the surface” as used in this specification may include, e.g., that the LED is located in or embedded in a cut-out, cavity or depression of the surface.
  • the LEDs may be covered, for example, by a protective, substantially transparent film, while still being “located on the surface”.
  • the light exit window may be defined as an aperture or a main aperture of the luminaire from which the light from the LED exits the luminaire.
  • the light exit window is located substantially oppositely from a top of the reflector of the luminaire, such that the light reflected by the reflector will exit the light exit window.
  • the lighting module is configured to or can be set to emit more light from at least one of the surfaces than from at least one other of the surfaces when connected to a power source. For example, more light may be emitted from the surfaces pointing towards the light exit window, whereby less rays may be blocked by the lighting module after being reflected by the reflector.
  • the lighting module is configured to or can be set to vary the current provided to at least one row of LEDs on the at least one surface from which less light is emitted, when connected to a power source, independently from the current provided to at least one other of the rows of LEDs.
  • a driver may be positioned in a base or a socket of the lighting module, whereby the lighting module may be used as a replacement lamp for an existing luminaire.
  • the driver may also vary the current to different rows of LEDs in order to further improve the efficiency of the lighting module and/or vary the light distribution.
  • the light output of the luminaire may be defined as the light flux exiting the light exit window, for example in lumen.
  • the rays emitted substantially towards the center, center line, or vertex of the luminaire will be reflected in an inefficient manner because the rays are reflected back onto the lighting module, thereby resulting in a shadowing effect.
  • the lighting module further comprises a controller or circuitry configured to control the current provided to the at least one of the rows of LEDs on the at least one surface from which less light is emitted when connected to a power source.
  • the controller is configured such as to individually control a light output of one or more of the LEDs of the at least one of the rows of LEDs when connected to a power source.
  • a controller or circuitry configured to control the current provided to a row of LEDs or to individual LEDs of a row of LEDs may optimize the efficiency of the lighting module in the luminaire depending on the orientation of the surfaces, while keeping substantially the same light output.
  • the controller or circuitry may re-allocate power saved from a row of LEDs on a surface from which less light is emitted, in order to provide more power to and emit more light from another row of LEDs. This may, for example, be a row of LEDs oriented substantially towards the light exit window of the luminaire, such that the light output emitted from the light exit window may be increased.
  • the at least one surface from which less light is emitted when connected to a power source comprises no LEDs, or the lighting module is configured so or can be set so that when the lighting module is connected to a power source, the current provided to at least one LED or at least one row of LEDs on the at least one surface from which less light is emitted, is less than the current provided to at least one of the other rows of LEDs located on at least one other of the surfaces.
  • the at least one surface from which less light is emitted when connected to a power source comprises a smaller number of LEDs compared to the at least one other of the surfaces.
  • At least one LED or at least one row of LEDs on the at least one surface from which less light is emitted is of lower nominal power compared to the at least one other of the surfaces.
  • the nominal power of an LED is substantially the power that the LED consumes, which is defined by the components in the LED.
  • an LED of lower nominal power or at least one row of LEDs having a lower total nominal power on the at least one surface from which less light is emitted, to for example the surface pointing towards the center, center line, or vertex of a reflector of a luminaire when the lighting module is mounted in a luminaire, less light is lost by being reflected towards the lighting module where light rays are blocked, while keeping substantially the same light output out of the light exit window of the luminaire.
  • This can be done by providing LEDs using less power and thereby emitting less light, or by providing more efficient LEDs that use less power but provide the same amount of light as a less efficient LED, i.e. by using LEDs with higher luminous efficacy or higher luminous efficiency.
  • the lighting module comprises a rotation mechanism allowing the heat sink and/or rows of LEDs to be rotated with respect to a base of the lighting module.
  • the surface from which less light is emitted when the lighting module is connected to a power source may be rotated such that said surface points towards the center, center line, or vertex of a reflector of a luminaire, when the lighting module is mounted in a luminaire, whereby less light is lost by being reflected towards the lighting module where light rays are blocked, while keeping
  • the rotation mechanism is configured so that the heat sink and/or rows of LEDs due to pull of gravity rotates into a set position when the lighting module is installed in a luminaire or light fitting.
  • Said set position may be so that a or the surface from which light is emitted when the lighting module is connected to a power source points upwards, i.e. in a direction substantially opposite a direction of earth gravity.
  • the rotation mechanism may comprise a counterweight so that the heat sink and/or rows of LEDs rotates into the set position when the lighting module is installed in a luminaire or light fitting.
  • the counterweight may be integrated or embedded in the lighting module, specifically in, within and/or forming part of the heat sink.
  • the counterweight may be positioned eccentrically from a center line of the heat sink or lighting module, the center line extending in the longitudinal direction.
  • the rotation mechanism comprises a manual adjustment mechanism, such that the heat sink may be rotated into a set position by a user. This may allow the person installing the lighting module of the invention in a luminaire to orient the surface from which less light is emitted correctly with respect to the reflector, regardless of the position of the base of the lighting module with respect to the socket of the luminaire.
  • the rotation mechanism comprises an automatic adjustment mechanism, such that the heat sink and/or rows of LEDs may be rotated into a set position.
  • the rotation mechanism may comprise a fixation mechanism or locking mechanism, such that the orientation of the lighting module may be fixed.
  • the fixation mechanism or locking mechanism may be a snap-lock, a clamp, a ring lock, or any other type of fixation or locking mechanisms.
  • the lighting module comprises a sensor configured to sense a position of a reflector and/or light exit window of a luminaire in which the lighting module can be installed, the sensor being connected to a controller configured to control a light output of one or more of the LEDs or rows of LEDs with respect to the position of the reflector and/or exit window when connected to a power source.
  • the sensor may be a photo sensor or a photodetector adapted to detect light or other electromagnetic energy.
  • the sensor converts light photons into current.
  • the sensor may be of the type using detection mechanisms such as: photoemission, photoelectric, photovoltaic, thermal, polarization, photochemical, or weak interaction effects.
  • the previously described rotation mechanism is included, the controller being configured to rotate the heat sink and/or rows of LEDs into said set position when the lighting module is installed in a luminaire or light fitting.
  • the sensor may be connected and/or communicate with the rotation mechanism, the driver, an/or the controller, such that the controller can be configured to rotate the heat sink and/or rows of LEDs and/or vary the light output of one or more of the LEDs or rows of LEDs, based on measurements from the sensor.
  • the senor comprises an LED as a light detection device.
  • said surface from which less light is emitted when the lighting module is connected to a power source may be oriented such that it points towards the center, center line, or vertex of a reflector of a luminaire, when the lighting module is mounted in a luminaire, whereby less light is lost by being reflected towards the lighting module where light rays are blocked, while keeping substantially the same light output out of the light exit window of the luminaire.
  • the lighting module comprises a heat pipe to improve dissipation of thermal energy and/or to improve thermal management.
  • the heat pipe may improve dissipation of heat energy from one or more LEDs of the lighting module. This may be achieved by including a heat pipe working as a heat transfer device and potentially combining the principles of thermal conductivity and phase transition to improve heat dissipation of thermal energy and thermal management.
  • the heat pipe may be a constant conductance heat pipe, a vapor chamber, a variable conductance heat pipe, a pressure controlled heat pipe, a diode heat pipe, a thermosiphon, rotating heat pipe, or any other heat pipe type.
  • a luminaire or light fitting comprising an lighting module according to any one of the above embodiments and a reflector surface for reflecting light emitted from the lighting module, wherein the lighting module is fitted in the luminaire or light fitting such that the surface which emits less light faces a center, center line or vertex of the reflector surface; or faces in a direction opposite to a main illumination direction or a light exit window; or faces in a direction opposite to a direction of earth gravity.
  • the reflector may be substantially arc-shaped and/or have a substantially parabolic shape and/or a substantially semi-elliptical shape, specifically in a cross section, more specifically in a cross section taken along a longitudinally extending center line of the lighting module.
  • the luminaire may comprise one or more reflectors, such that one or more lighting modules may be fitted in the luminaire.
  • the lighting module may be positioned substantially in an optical center of the reflector or luminaire or light fitting.
  • Fig. 1 shows a cross sectional view of a lighting module according to an embodiment of the invention, where the lighting module is placed in a luminaire with a parabolic shaped reflector in cross-section, and where no light is emitted from one surface of the lighting module.
  • Fig. 2 shows a cross sectional view similar to that of Fig. 1 of a lighting module according to an embodiment of the invention, where the lighting module is placed in a luminaire with a parabolic shaped reflector in cross-section, and where less light is emitted from a surface of the lighting module than from other surfaces of the lighting module.
  • Fig. 3 shows a side-view of a lighting module according to an embodiment of the invention, comprising a plurality of rows of LEDs and a driver, and where a longitudinal axis of the lighting module is shown.
  • Fig. 4 shows a side-view similar to that of Fig. 3 of a lighting module according to an embodiment of the invention, comprising a plurality of rows of LEDs and a rotation mechanism, and where a longitudinal axis of the lighting module is shown.
  • Fig. 5 shows a cross sectional view of the lighting module shown in Fig. 1 which has been modified, to comprise a counterweight.
  • Fig. 6 shows a side-view similar to that of Fig. 3 of a lighting module according to an embodiment of the invention, comprising a plurality of rows of LEDs, a controller, and where the longitudinal axis is shown.
  • Fig. 7 shows a side-view similar to that of Fig. 3 of a lighting module according to an embodiment of the invention, comprising a plurality of rows of LEDs, a sensor, and where the longitudinal axis is shown.
  • Fig. 1 shows a cross sectional view of a lighting module 1 according to an embodiment of the invention, where the lighting module 1 is placed in a luminaire (not shown) with a parabolic shaped reflector 2 in cross-section.
  • the lighting module 1 comprises a heat sink 10 for dissipating thermal energy.
  • the heat sink 10 is hexagonal in cross section so as to form six surfaces 11, 12 corresponding to the polygonal shape of the heat sink 10, each surface 11, 12 extending in a longitudinal direction LA (shown on Fig. 3), where the longitudinal direction LA extends perpendicularly to the plane of the cross section.
  • the lighting module 1 comprises at least one row of LEDs 8 (only one of which LEDs is visible in cross-section on Fig.
  • each row 8 comprising at least two LEDs 13, located on each of five of the six surfaces 11, and wherein the remaining surface 12 comprises no LEDs, so that, when connected to a power source, no light is emitted from the latter surface 12.
  • the remaining surface 12 comprises no LEDs, so that, when connected to a power source, no light is emitted from the latter surface 12.
  • five surfaces 11 emit the same amount of light, whereas the remaining surface 12 emits no light.
  • a problem related to LED lamps of the prior art is that light hitting the surface of the reflector in an orthogonal or substantially orthogonal angle, will be reflected back towards the lighting module, resulting in light being blocked before reaching the light exit window.
  • the overall efficiency of the lighting module may be improved, as the lighting module does not consume energy to emit light that would have otherwise been blocked by the lighting module 1.
  • the energy consumption of the lighting module may therefore be reduced, while keeping substantially the same light output from the light exit window 22 of the luminaire.
  • the reflector 2 has a parabolic shape in a cross section taken along a longitudinally extending center line of the lighting module 1. In three dimensions, the reflector 2 has a paraboloid shape.
  • the lighting module 1 is installed in the luminaire, to be orientated such that one of the surfaces 12 of the heat sink 10 is parallel with the light exit window 22 and faces away from the light exit window 22. Thereby, no light is emitted from this surface 12 towards the vertex 23 of the reflector 2.
  • the lighting module 1 further comprises a base 17 (shown e.g. in Fig. 3) adapted to connect the lighting module 1 to a socket of the luminaire. As the lighting module 1 may be designed to replace conventional lamps, the socket of the luminaire and the base 17 will often be of the screw, bayonet, or pin type.
  • the lighting module 1 further comprises a secondary heat sink 24 (shown e.g. in Fig. 3) arranged at each longitudinal end of the heat sink 10.
  • the secondary heat sinks 24 have a truncated cone shape which improves heat dissipation by providing a large surface area in contact with the ambient air.
  • Fig. 2 shows a cross sectional view similar to that of Fig. 1 wherein a lighting module 1 according to another embodiment of the invention is shown arranged in the reflector 2.
  • the shown lighting module differs from the one shown in Fig. 1, in that it comprises a row of LEDs 8 on each of the six surfaces 11, 12.
  • the lighting module 1 is configured such that less light is emitted from one surface 12 of the lighting module 1 than from the other surfaces 11 of the lighting module 1, as indicated by the arrows on the figure. This may be achieved by providing the surface 12 from which less light is emitted with fewer LEDs 13 than the other surfaces, or by configuring the lighting module 1 such that less current is provided to the surface 12 from which less light is emitted, during operation of the lighting module 1.
  • a lighting module 1, wherein one of the surfaces 12 is statically configured to emit less light than the other surfaces 11 , is achieved.
  • the lighting module 1 may be configured to selectively decrease the current provided to one of the surfaces during operation, whereby the surface from which less light is emitted may be selected dynamically.
  • the advantage of providing a lighting module 1 capable of dynamically selecting which surface less light is emitted from, is that the final orientation of the surfaces 11, 12 relative to the reflector, when the lighting module 1 is mounted in the luminaire, is trivial. It may therefore be ensured that the surface 12 from which less light is emitted may be oriented towards the vertex 23 of the reflector 2.
  • Fig. 3 shows a side-view of a lighting module 1, according to an embodiment of the invention.
  • the shown embodiment comprises a row of LEDs 8 on each of the surfaces 11, 12 or five of the six surfaces 11.
  • the shown lighting module 1 further comprises a driver 9.
  • the driver 9 is configured to convert and/or regulate the voltage supplied by a power source of the luminaire, such that the lighting module 1 may be retrofitted in a luminaire intended for a conventional lamp.
  • Each of the rows of LEDs 8 comprises eight LEDs 13.
  • the driver 9 is positioned in the base 17 of the lighting module 1.
  • Fig. 4 shows a side-view of a lighting module 1 according to an embodiment of the invention.
  • the shown lighting module 1 comprises a rotation mechanism 15 which allows the heat sink 10 to be rotated with respect to a base 17 of the lighting module 1.
  • the rotation mechanism 15 is positioned between the base 17 and one of the secondary heat sinks 24.
  • the rotation mechanism 15 may alternatively be positioned between the heat sink 10 and the base 17 if no secondary heat sinks 24 are present or alternatively in the base 17.
  • the rotation mechanism 15 may be driven manually by hand, whereby the person installing the lighting module 1 into the luminaire may rotate the heat sink 10 after connecting the base 17 to the socket to orient the first surface 12 towards a set point on the surface 21 of the reflector 2.
  • the rotation mechanism 15 is configured so that the heat sink 10, due to pull of gravity rotates into a set position when the lighting module 1 is installed in a luminaire or light fitting.
  • the rotation mechanism 15 comprises a counterweight 18 integrated or embedded in the lighting module 1, specifically in, within and/or forming part of the heat sink 10, such that the lighting module 1 is provided with an un-even weight distribution.
  • the counter weight 18 When installed, the counter weight 18 will fall towards the lowest point in the gravitational field, i.e. the rotation mechanism 15 will rotate to minimize the potential energy of the mass of the lighting module 1.
  • the surface 12 from which less light is emitted may be opposite the counter weight 18, such that the surface 12 from which less light is emitted is oriented upwards with respect to the gravitational field when the rotation mechanism 15 rotates into its equilibrium, and thus also oriented towards the vertex 23 of the reflector 2.
  • the rotation mechanism 15 may include an automatic adjustment mechanism adapted for automatically orienting the surface 12 from which less light is emitted in a predetermined direction in relation to the luminaire when the lighting module 1 is installed in the luminaire.
  • Such an automatic adjustment mechanism may be driven electronically by a motor, whereby the orientation of the surface 12 from which less light is emitted and the other surfaces 11 may by adjusted continuously. This may be autonomously controlled by a controller 14 of the lighting module 1 or it may be controlled remotely through a wireless control unit.
  • Fig. 6 shows a lighting module 1 according to an embodiment of the invention.
  • the shown embodiment comprises a controller 14 configured to control the current provided to the at least one of the rows of LEDs 8 on the at least one surface 12 from which less light is emitted when connected to a power source.
  • the controller 14 is positioned between the base 17 and one of the secondary heat sinks 24, but may alternatively be positioned between the heat sink 10 and the base 17 if no secondary heat sinks 24 are present, or may
  • the controller 14 is configured such as to individually control a light output of one or more of the LEDs 13 of the at least one of the rows of LEDs 8 when connected to a power source.
  • the lighting module 1 comprises a sensor 16 configured to sense a position of the lighting module 1 with respect to the reflector 2 and/or the light exit window 22 of a luminaire, when the lighting module 1 is installed.
  • the sensor 16 is connected to a controller (not shown in Fig. 7) configured to control a light output of one or more of the LEDs 13 or rows of LEDs 8.
  • the surface 12 from which less light is emitted may thereby be selectively chosen based on the measurement of the sensor 16.
  • the sensor 16 is here positioned between the base 17 and one of the secondary heat sinks 24.
  • the sensor 16 may alternatively be positioned between the heat sink 10 and the base 17 if no secondary heat sinks 24 are present, or alternatively in the base 17.
  • Such sensors 16 may also advantageously be provided in embodiments comprising an automatically adjusting rotation mechanism 15.
  • the rotation mechanism 15 may then position the lighting module 1 based on the position determined by the sensor(s) 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

La présente invention concerne un module d'éclairage (1) destiné à être utilisé dans un luminaire, comprenant un dissipateur thermique (10) pour dissiper l'énergie thermique, lequel dissipateur thermique (10) a une coupe transversale polygonale, formant un certain nombre de surfaces (11, 12) correspondant à la forme polygonale du dissipateur thermique (10), chaque surface (11, 12) s'étendant dans une direction longitudinale, ladite direction longitudinale s'étendant de manière sensiblement perpendiculaire à un plan de ladite section transversale, au moins une rangée de DEL (8) étant située sur chacune d'au moins deux desdites surfaces (11, 12), chaque rangée (8) comprenant au moins deux DEL (13) de sorte que la lumière peut être émise à partir de chaque surface (11, 12) comprenant une rangée de DEL (8) respective, les DEL (13) étant conçues de telle sorte que le module d'éclairage (1), lorsqu'il est raccordé à une source d'alimentation, est conçu ou peut être réglé pour émettre moins de lumière à partir d'au moins une desdites surfaces (12) qu'à partir d'au moins une autre desdites surfaces (11).
PCT/EP2018/069004 2017-07-20 2018-07-12 Module d'éclairage WO2019016079A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17182257.0 2017-07-20
EP17182257 2017-07-20

Publications (1)

Publication Number Publication Date
WO2019016079A1 true WO2019016079A1 (fr) 2019-01-24

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Application Number Title Priority Date Filing Date
PCT/EP2018/069004 WO2019016079A1 (fr) 2017-07-20 2018-07-12 Module d'éclairage

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Country Link
WO (1) WO2019016079A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100968270B1 (ko) 2009-09-11 2010-07-06 (주)엠이씨 엘이디 조명장치
JP2011243512A (ja) 2010-05-20 2011-12-01 Birumen Kagoshima:Kk Ｌｅｄ照明具
US20120080994A1 (en) 2010-10-05 2012-04-05 Hua-Chun Chin LED Lamp Whose Lighting Direction Can Be Adjusted Easily and Quickly
US20130163240A1 (en) * 2011-12-23 2013-06-27 Chien-yuan Chen Led street lamp
EP2636948A1 (fr) 2012-03-09 2013-09-11 Zumtobel Lighting GmbH Lampe DEL et procédé de fonctionnement d'une telle lampe
CN104019384A (zh) * 2013-02-28 2014-09-03 株式会社东芝 照明装置
US20150241042A1 (en) 2014-02-27 2015-08-27 QTOP USA, Inc. Pivotable LED Light Bulb Apparatus
CN206018328U (zh) * 2016-09-28 2017-03-15 深圳市莱可照明科技有限公司 Led玉米灯

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100968270B1 (ko) 2009-09-11 2010-07-06 (주)엠이씨 엘이디 조명장치
JP2011243512A (ja) 2010-05-20 2011-12-01 Birumen Kagoshima:Kk Ｌｅｄ照明具
US20120080994A1 (en) 2010-10-05 2012-04-05 Hua-Chun Chin LED Lamp Whose Lighting Direction Can Be Adjusted Easily and Quickly
US20130163240A1 (en) * 2011-12-23 2013-06-27 Chien-yuan Chen Led street lamp
EP2636948A1 (fr) 2012-03-09 2013-09-11 Zumtobel Lighting GmbH Lampe DEL et procédé de fonctionnement d'une telle lampe
CN104019384A (zh) * 2013-02-28 2014-09-03 株式会社东芝 照明装置
US20150241042A1 (en) 2014-02-27 2015-08-27 QTOP USA, Inc. Pivotable LED Light Bulb Apparatus
CN206018328U (zh) * 2016-09-28 2017-03-15 深圳市莱可照明科技有限公司 Led玉米灯

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