EP4161216A1 - Lichttreiber mit fernanzeiger-led und notprüftaste - Google Patents

Lichttreiber mit fernanzeiger-led und notprüftaste Download PDF

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Publication number
EP4161216A1
EP4161216A1 EP21200649.8A EP21200649A EP4161216A1 EP 4161216 A1 EP4161216 A1 EP 4161216A1 EP 21200649 A EP21200649 A EP 21200649A EP 4161216 A1 EP4161216 A1 EP 4161216A1
Authority
EP
European Patent Office
Prior art keywords
driver
status indicator
light
pcb
led
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.)
Pending
Application number
EP21200649.8A
Other languages
English (en)
French (fr)
Inventor
Mark Hannaby
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.)
Tridonic GmbH and Co KG
Original Assignee
Tridonic GmbH and Co KG
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 Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Priority to EP21200649.8A priority Critical patent/EP4161216A1/de
Priority to PCT/EP2022/076063 priority patent/WO2023057201A1/en
Publication of EP4161216A1 publication Critical patent/EP4161216A1/de
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]

Definitions

  • the present disclosure relates to lighting technology, and to status indicator LEDs as well as test switches thereof.
  • the present disclosure relates to a driver for a light source, a method of operating the same, and a luminaire including the driver.
  • Emergency lighting drivers equipped for manually initiated testing may be provided with a status indicator LED and a test button.
  • Long wire connections between such an assembly and the driver can lead to problems with meeting EMC & transient standards as noise can be induced via the long leads. Avoiding these problems may complicate and/or impose limits on a design of the emergency lighting system.
  • the present disclosure aims to improve the emergency lighting systems of the background art.
  • An objective is to provide a lighting driver avoiding EMC & transient issues in connection with remote status indicator and test button assemblies.
  • a first aspect of the present disclosure relates to a driver for a light source, including a printed circuit board (PCB); a status indicator LED preferably directly mounted on the PCB; and an optical fiber arrangement configured to deliver light emitted by the status indicator LED at a light sensor preferably directly mounted on the PCB and connected to a control circuitry of the driver.
  • PCB printed circuit board
  • a status indicator LED preferably directly mounted on the PCB
  • an optical fiber arrangement configured to deliver light emitted by the status indicator LED at a light sensor preferably directly mounted on the PCB and connected to a control circuitry of the driver.
  • the optical fiber arrangement may be configured to deliver light emitted by the status indicator LED partly at a status indicator light output spaced apart from the driver, and partly at the PCB-mounted light sensor via a test button spaced apart from the driver.
  • the test button may be arranged to selectively block incident light through actuation.
  • the driver may include an emergency lighting LED driver; and the light source may include an LED.
  • the LED may be arranged to emit visible light.
  • the LED may be arranged to emit invisible light.
  • the control circuitry may be arranged to monitor a reception of the light sensor for detecting the actuation of the test button.
  • the optical fiber arrangement may include a 1x2 optic coupler.
  • the optical fiber arrangement may include a 1x2 fused fiber optic coupler.
  • the status indicator light output may include a 1x2 optic coupler.
  • the 1x2 optic coupler may be arranged to generate the light output through macro-bending.
  • the status indicator light output and the test button may be integral with one another.
  • the light sensor may include a photo diode.
  • a second aspect of the present disclosure relates to a luminaire, including a driver of the first aspect or any of its implementations; and a light source operable by the driver.
  • the test button may be arranged at a housing of the luminaire inside which the driver is arranged.
  • a third aspect of the present disclosure relates to a method of operating a driver for a light source.
  • the driver includes a PCB and a status indicator LED preferably directly mounted on the PCB.
  • the method includes: using an optical fiber arrangement to deliver light emitted by the status indicator LED at a light sensor preferably directly mounted on the PCB and connected to a control circuitry of the driver.
  • the present disclosure proposes using a flexible fibre-optic cable and a PCB-mounted status indicator LED to replace leaded status indicator LEDs, and implementing the test button function using optical feedback from the indicator LED.
  • Light guides have been seen on luminaires previously but they have been of the solid type, usually built into the construction of the luminaire itself.
  • Fibre-optic cables are non-conductive and thus immune to problems with passing transient tests & meeting EMC standards.
  • optical fiber makes routing and positioning of the status indicator easier for the luminaire manufacturer when compared to solid light guides.
  • Placing the status indicator LED on the driver PCB and using a flexible optical fibre to carry the light from the indicator through the luminaire to where ever needed by the luminaire design without picking up any noise may simplify a design and reduce development time for the both the driver designer and the luminaire manufacturer.
  • FIG. 1 illustrates a luminaire 2 and a driver 1 in accordance with the present disclosure.
  • the luminaire 2 includes the driver 1 and a light source 25 operable by the driver 1.
  • the light source 25 may include an LED.
  • the driver 1 may include an emergency lighting LED driver.
  • the driver 1 includes a PCB 11 and a status indicator LED 111 preferably directly mounted on the PCB 11.
  • the status indicator LED 111 may be arranged to emit visible light, and may additionally be arranged to emit invisible light.
  • the driver 1 further includes an optical fiber arrangement 23A configured to deliver light emitted by the status indicator LED 111 at a light sensor 112 preferably directly mounted on the PCB 11 and connected to a control circuitry (not shown) of the driver 1.
  • the light sensor 112 may include a photo diode.
  • the optical fiber arrangement 23A may be configured to deliver light emitted by the status indicator LED 111 partly at a status indicator light output 21 spaced apart from the driver 1, and partly at the PCB-mounted light sensor 112 via a test button 22 spaced apart from the driver 1.
  • the optical fiber arrangement 23A may include a 1x2 optic coupler, and may in particular include a 1x2 fused fiber optic coupler .
  • the test button 22 may be arranged at a housing 24 of the luminaire 2 inside which the driver 1 is arranged, and may be arranged to selectively block incident light through actuation. As such, an actuation of the test button 22 will selectively block the light emitted by the status indicator LED 111 and partly delivered at the PCB-mounted light sensor 112 via the test button 22.
  • the control circuitry of the driver 1 may be arranged to monitor a reception of the light sensor 112 for detecting the actuation of the test button 22.
  • the status indicator light output 21 and the test button 22 may be integral with one another, i.e. may form an assembly.
  • FIG. 2 illustrates a further luminaire 2 and driver 1 in accordance with the present disclosure.
  • a 1x2 optic coupler may be included in the status indicator light output 21.
  • the 1x2 optic coupler included in the status indicator light output 21 may be arranged to generate the light output through macro-bending.
  • the fiber cable may be subjected to a significant amount of bending above a critical value of curvature. This inhibits the light guidance mechanism and causes light energy to be radiated from the fiber.
  • the macro-bending may be accomplished in many ways, including leading the fiber around a member having a curvature or cylindric radius which is suitable of causing enough macro-bending losses for delivering light emitted by the status indicator LED 111 partly at the status indicator light output 21.
  • FIG. 3 illustrates a flow chart of a method 3 in accordance with the present disclosure of operating a driver 1.
  • the driver 1 includes a PCB 11 and a status indicator LED 111 preferably directly mounted on the PCB 11.
  • the method 3 includes: using 31 an optical fiber arrangement 23A; 23B to deliver light emitted by the status indicator LED 111 at a light sensor 112, which is also preferably directly mounted on the PCB 11 and connected to a control circuitry of the driver 1.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP21200649.8A 2021-10-04 2021-10-04 Lichttreiber mit fernanzeiger-led und notprüftaste Pending EP4161216A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21200649.8A EP4161216A1 (de) 2021-10-04 2021-10-04 Lichttreiber mit fernanzeiger-led und notprüftaste
PCT/EP2022/076063 WO2023057201A1 (en) 2021-10-04 2022-09-20 Lighting driver with remote indicator led and emergency test button

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21200649.8A EP4161216A1 (de) 2021-10-04 2021-10-04 Lichttreiber mit fernanzeiger-led und notprüftaste

Publications (1)

Publication Number Publication Date
EP4161216A1 true EP4161216A1 (de) 2023-04-05

Family

ID=78078041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21200649.8A Pending EP4161216A1 (de) 2021-10-04 2021-10-04 Lichttreiber mit fernanzeiger-led und notprüftaste

Country Status (2)

Country Link
EP (1) EP4161216A1 (de)
WO (1) WO2023057201A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4489525A1 (de) * 2023-07-04 2025-01-08 Tridonic GmbH & Co. KG Statusanzeige für notbeleuchtungsausrüstung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010071715A (ja) * 2008-09-17 2010-04-02 Fuji Xerox Co Ltd 導波路の耐屈曲性試験機
US20120302874A1 (en) * 2009-12-01 2012-11-29 Hollstien David S Non-invasive implant rupture detection system
US20180103303A1 (en) * 2016-10-11 2018-04-12 Fluke Corporation Optically-addressable optical switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010071715A (ja) * 2008-09-17 2010-04-02 Fuji Xerox Co Ltd 導波路の耐屈曲性試験機
US20120302874A1 (en) * 2009-12-01 2012-11-29 Hollstien David S Non-invasive implant rupture detection system
US20180103303A1 (en) * 2016-10-11 2018-04-12 Fluke Corporation Optically-addressable optical switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4489525A1 (de) * 2023-07-04 2025-01-08 Tridonic GmbH & Co. KG Statusanzeige für notbeleuchtungsausrüstung

Also Published As

Publication number Publication date
WO2023057201A1 (en) 2023-04-13

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