EP2843300A1 - LED-Beleuchtungseinheit und Verfahren - Google Patents

LED-Beleuchtungseinheit und Verfahren Download PDF

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Publication number
EP2843300A1
EP2843300A1 EP14182498.7A EP14182498A EP2843300A1 EP 2843300 A1 EP2843300 A1 EP 2843300A1 EP 14182498 A EP14182498 A EP 14182498A EP 2843300 A1 EP2843300 A1 EP 2843300A1
Authority
EP
European Patent Office
Prior art keywords
emergency
led light
light source
led
regular
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Withdrawn
Application number
EP14182498.7A
Other languages
English (en)
French (fr)
Inventor
Luc Truyen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Etap NV
Original Assignee
Etap NV
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 Etap NV filed Critical Etap NV
Publication of EP2843300A1 publication Critical patent/EP2843300A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
    • F21S9/022—Emergency lighting devices
    • F21S9/024—Emergency lighting devices using a supplementary light source for emergency lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F21Y2105/12—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to LED lighting unit, comprising an armature and a lighting module carried by the armature, the lighting module including at least one regular LED light source and an optic element forming a radiation pattern from an optic beam generated by the regular LED light source.
  • Such a LED lighting unit is generally known for lighting rooms in buildings, such as offices etc.
  • the driver is arranged for generating power signals to the individual LED's so that an optimal light beam is generated and focused to an area to be lighted, usually the floor.
  • the optical element is typically designed such that a so-called depth radiation pattern is provided.
  • emergency lighting units for providing light in emergency situations, especially when the mains power voltage drops.
  • Such emergency lighting units are powered by an emergency power source and have a specific optic element for providing a so-called wide radiation pattern, thereby minimizing the number of emergency lighting units that are required in an area to be lighted.
  • a LED lighting unit that is suitable for generating an emergency light and that is also attractive from an economical point of view.
  • a LED lighting unit according to the preamble is provided, wherein the lighting module further includes an emergency unit having a printed circuit substrate and at least one emergency LED light source mounted on said printed circuit substrate and placed adjacent the regular LED light source such that the optic element also forms a radiation pattern from an optic beam generated by the emergency LED light source.
  • a single lighting unit can advantageously be used for both purposes.
  • the invention is at least partially based on the insight that for the purpose of the emergency function, only a reduced light intensity is required that can be generated by a reduced number of LED's, or even a single LED in the lighting unit.
  • the property can advantageously be exploited that the light intensity generated by a LED is easily controlled by the electrical power that is offered to the LED, thereby enabling a very efficient emergency function.
  • the generation of the so-called depth radiation pattern enables efficient use of energy, also in the emergency state of the lighting unit.
  • the invention is also at least partially based on the insight that due to the size of LED light sources, the emergency LED light source can be placed close to the regular LED light source such that a single optic element is required for providing a desired radiation pattern both from light generated by the regular LED light source and form light generated by the emergency LED light source.
  • the emergency function of the lighting unit is invisibly integrated in the regular LED lighting unit, and no separate emergency lighting units have to be installed, implying that a costly and relatively complicated study and design of the number and location of emergency lighting units having specific optical modules is now superfluous. Also, a cost reduction can be obtained in terms of installation effort.
  • each LED lighting unit in an area in the building can be used in an emergency state, the emergency lighting approach is inherently more safe compared to the traditional design of dedicated emergency lighting units. This is due to the fact that traditional emergency lighting units are minimized in number, causing a relatively dark spot when an emergency lighting unit does not provide light, while in the new approach a relatively large number of lighting units can be used, so that a single defect lighting unit generates only a minor dark spot.
  • the depth radiation pattern of the LED light unit reduces the chance of dazzling persons, in contrast to the traditional emergency lighting units that usually have a wide radiation pattern.
  • the emergency unit by providing the emergency unit with a printed circuit substrate that is separate from the structure on which the regular LED light sources are mounted, a conventional LED lighting unit that has been installed can easily be upgraded to a LED lighting unit according to the invention. Further, the emergency unit can thus be repaired or exchanged easily without interfering with the regular functionality of the LED lighting unit.
  • Fig. 1 and Fig. 2 show merely preferred embodiments according to the invention.
  • the same reference numbers refer to equal or corresponding parts.
  • FIG. 1 shows a schematic perspective view of a LED lighting unit 1 according to a first embodiment of the invention.
  • the unit 1 comprises an armature 2 and a multiple number of lighting modules 3 carried by the armature 2.
  • Each of the lighting modules 3 includes a single or a multiple number of regular LED light sources.
  • each of the lighting modules 3 includes an optic element 4 for forming a radiation pattern B from an optic beam generated by the regular LED light sources.
  • the optic element 4 may include a single or a multiple number of optical parts, such as reflecting and/or diffusing parts, for providing a so-called depth radiation pattern wherein the light is mainly focused downwardly towards the floor of the space wherein the unit 1 has to be mounted.
  • the intensity of light propagating in a sideward direction is relatively small.
  • the optic element 4 may also be designed to form another radiation pattern from the light that is generated by the regular LED light sources, e.g. a relatively wide beam.
  • the lighting modules 3 are arranged in a matrix having rows and columns.
  • the lighting modules can also be arranged in another pattern, e.g. in a one-dimensional row or in another mainly uniform or non-uniform distributed manner.
  • the lighting module further includes an emergency unit having a printed circuit substrate and at least one emergency LED light source placed adjacent the regular LED light source such that the optic element also forms a radiation pattern from an optic beam generated by the emergency LED light source.
  • FIG. 2 shows a schematic perspective partial exploded view of a LED lighting unit 1 according to a second embodiment of the invention.
  • the lighting modules 3 are arranged in a one-dimensional row.
  • three lighting modules 3 are visible.
  • the optic element 4 of the lighting module 3 in the middle has been lifted making the structure behind the optic element 4 visible.
  • the lighting module 3 includes a mounting unit 5, attached to the armature 2 on which mounting unit 5 the regular LED light source 6 is mounted.
  • the emergency unit 7 includes a printed circuit substrate 8 and four emergency LED light sources 9a-d placed adjacent the regular LED light source 6.
  • the emergency LED light sources 9 are located on a circle 10, preferably evenly distributed in the circumferential direction, surrounding a line of symmetry S of the optic element 4 such that the optic element 4 also forms a radiation pattern from the optic beams generated by the emergency LED light sources 9.
  • the optic element 4 provides a desired light pattern, both from the regular and the emergency LED light sources 6, 9.
  • the use of additional optic elements is superfluous, thereby reducing costs and maintaining an esthetical design of the LED lighting unit 1.
  • the printed circuit substrate 8 of the emergency unit 7 includes a flexible circuit foil, e.g. made from a flexible PCB or a plastic such as a polyimide, PEEK or a transparent conductive polyester film.
  • a flexible circuit foil By applying a flexible circuit foil, the process of assembling the lighting module is rendered simple and a chance of damage during handling the armature is low.
  • another printed circuit substrate can be applied, such as a rigid printed circuit board, e.g. FR4, can be applied.
  • the emergency LED light sources 9 are located close to the line of symmetry S of the optic element 4, thereby improving the optical performance of the optic element 4 relative to the emergency LED light sources 9.
  • the emergency LED light sources have an offset relative to said line of symmetry S.
  • an emergency LED light source can also be located at said line of symmetry S, or at a distance more remote from said line of symmetry S.
  • the printed circuit substrate 8 of the emergency unit 7 is located between the mounting unit 5 and the optic element 4 of the lighting module 3.
  • the regular LED light source and the emergency LED light sources can be located close to each other, thereby providing a module 3 with a single optic element 4 generating a desired radiation pattern for both the regular and the emergency LED light sources.
  • the mounting unit 5 can be replaced by another structure on which the regular LED light source 6 is mounted.
  • the regular LED light source 6 can be mounted directly on the armature 2 of the lighting unit 1.
  • the structure on which the regular LED light source is mounted and the printed circuit substrate of the emergency unit are different.
  • the printed circuit substrate 8 is provided with an opening 11 allowing light generated by the regular LED light source 6 of the lighting module 3 to propagate towards the optic element 4.
  • the regular LED light source 6 and the emergency LED light sources 9 can be located close to each other in a compact design while maintaining a reliable, stable assembling process.
  • the lighting module 3 includes a multiple number of regular LED light sources.
  • the printed circuit substrate of the emergency unit 7 can be provided with a multiple number of openings, each of them allowing light generated by a single or a multiple number of regular LED light sources 6 to propagate towards the optic element 4.
  • the number of emergency LED light sources 9 is four.
  • another number of emergency LED light sources 9 can be applied, e.g. three, two or one emergency LED light source, or more than four light sources, e.g. five or ten emergency LED light sources.
  • the mounting unit 5 with the at least one regular LED light source is interposed between the optic element 4 and the printed circuit substrate 8. Then, openings can be provided in the mounting unit 5 allowing light generated by the at least one emergency LED light source to propagate towards the optic element 4.
  • the optic element 4 is dome-shaped, and the emergency LED light sources are located within the dome of the optic element.
  • the optic element 4 may have another geometry, e.g. being plate-shaped.
  • the light generated by the LED light sources propagates through and/or along the optic element 4 for obtaining a desired radiation pattern.
  • the emergency LED's generate an emitted flux that is less than 10% of the flux emitted by the regular LED's, thereby saving power during an emergency situation.
  • the LED lighting unit 1 may includes a multiple number of lighting modules 3 as described above, i.e. including an emergency unit 7. However, the LED lighting unit 1 may also include only one lighting module 3 with an emergency unit 7. Further, the LED lighting unit 1 may include lighting modules 3 without an emergency unit, i.e. including only one or more regular LED light sources, not including an emergency LED light source.
  • the LED lighting unit 1 further includes regular input terminals 12 for being connected to a regular driver driving the regular LED's when the LED lighting unit 1 is switched on.
  • the printed circuit substrate 8 of the emergency unit 7 includes also emergency input terminals 13 for being connected to an emergency driver for driving the emergency LED's in case of emergency.
  • all emergency LED light sources of the LED lighting unit optionally from a multiple number of emergency units, are driven via a single set of emergency input terminals 13.
  • a lighting system including a regular driver, an emergency driver and a LED lighting unit as described above, wherein the regular driver is connected to the regular input terminals for driving the at least one regular LED light source of the lighting module, and wherein the emergency driver is connected to the emergency input terminals for driving the at least one emergency LED light source.
  • the lighting system includes a multiple number of LED lighting units as described above, wherein the emergency driver is connected to the emergency input terminals of the multiple number of LED lighting units, for driving the at least one emergency LED light source of the multiple number of LED lighting units.
  • the emergency input terminals of each LED lighting unit are connected to a corresponding emergency driver so that each emergency driver drives the at least one emergency LED light source of a corresponding LED lighting unit.
  • each LED lighting unit in a room and/or each LED lighting unit of a lighting system is provided with an emergency unit as described above.
  • the emergency driver drives the emergency LED light sources when the mains voltage drops and the regular driver stops operating.
  • a mains power keeping the regular driver in operation can be implemented as 230 V or other typical voltage values offered by regular electrical power connections.
  • the emergency power can be formed by a separate mains voltage and/or a local power supply, such as a battery 7. Further, control lines can be connected to manual or automatic switches.
  • the multiple number of regular LED's 3 are driven by providing a mains voltage, via the regular driver, to the individual LED's 3.
  • the emergency driver starts operating supplying power to the emergency LED's, via the emergency input terminals 13.
  • a regular or emergency LED light source can be implemented as an OLED or a chip on board (COB) module, and/or may include a remote phosphor module.
  • COB chip on board
EP14182498.7A 2013-08-28 2014-08-27 LED-Beleuchtungseinheit und Verfahren Withdrawn EP2843300A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2011346A NL2011346C2 (en) 2013-08-28 2013-08-28 A led lighting unit and a method.

Publications (1)

Publication Number Publication Date
EP2843300A1 true EP2843300A1 (de) 2015-03-04

Family

ID=49447786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14182498.7A Withdrawn EP2843300A1 (de) 2013-08-28 2014-08-27 LED-Beleuchtungseinheit und Verfahren

Country Status (2)

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EP (1) EP2843300A1 (de)
NL (1) NL2011346C2 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2430728A (en) * 2005-09-21 2007-04-04 Imt Bv Lamp with secondary LEDs for providing light after explosion
CH697541B1 (de) * 2005-03-15 2008-11-28 Regent Beleuchtungskoerper Ag Leuchte und Verwendung von dieser.
US20100020527A1 (en) * 2008-07-23 2010-01-28 Fiermuga Robert F Emergency egress lighting system
US20110068692A1 (en) * 2009-09-24 2011-03-24 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp
DE202011102371U1 (de) * 2011-06-27 2011-08-18 Wen-Tsung Lin Lichtquelle mit Energierückgewinnungs- und Speicherfunktion
GB2489505A (en) * 2011-03-31 2012-10-03 Litonics Ltd Lighting apparatus control method
DE202012009636U1 (de) * 2011-10-07 2012-11-08 Tridonic Gmbh & Co. Kg Beleuchtungssystem mit einem Leuchtmittel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH697541B1 (de) * 2005-03-15 2008-11-28 Regent Beleuchtungskoerper Ag Leuchte und Verwendung von dieser.
GB2430728A (en) * 2005-09-21 2007-04-04 Imt Bv Lamp with secondary LEDs for providing light after explosion
US20100020527A1 (en) * 2008-07-23 2010-01-28 Fiermuga Robert F Emergency egress lighting system
US20110068692A1 (en) * 2009-09-24 2011-03-24 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp
GB2489505A (en) * 2011-03-31 2012-10-03 Litonics Ltd Lighting apparatus control method
DE202011102371U1 (de) * 2011-06-27 2011-08-18 Wen-Tsung Lin Lichtquelle mit Energierückgewinnungs- und Speicherfunktion
DE202012009636U1 (de) * 2011-10-07 2012-11-08 Tridonic Gmbh & Co. Kg Beleuchtungssystem mit einem Leuchtmittel

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Publication number Publication date
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