EP3422821A1 - Beleuchtungsvorrichtung und verfahren in verbindung mit einer beleuchtungsvorrichtung - Google Patents

Beleuchtungsvorrichtung und verfahren in verbindung mit einer beleuchtungsvorrichtung Download PDF

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Publication number
EP3422821A1
EP3422821A1 EP18178517.1A EP18178517A EP3422821A1 EP 3422821 A1 EP3422821 A1 EP 3422821A1 EP 18178517 A EP18178517 A EP 18178517A EP 3422821 A1 EP3422821 A1 EP 3422821A1
Authority
EP
European Patent Office
Prior art keywords
light
lighting device
light sources
reflected
determined
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.)
Granted
Application number
EP18178517.1A
Other languages
English (en)
French (fr)
Other versions
EP3422821B1 (de
Inventor
Jari Tabell
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.)
Teknoware Oy
Original Assignee
Teknoware Oy
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 Teknoware Oy filed Critical Teknoware Oy
Publication of EP3422821A1 publication Critical patent/EP3422821A1/de
Application granted granted Critical
Publication of EP3422821B1 publication Critical patent/EP3422821B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source

Definitions

  • the invention relates to lighting devices, and specifically to exit and emergency lights.
  • Exit and emergency lights are lighting devices used in facilities for safety of the facility especially in emergencies.
  • the purpose of exit lights is to indicate an emergency exit for people in the facility in order to guide them out of the facility in case of emergency.
  • exit lights are provided with a symbol including an indicator arrow attached to a cover of the lighting device or the like, to indicate the emergency exit from the facility.
  • Emergency lights are lighting devices ensuring sufficient illumination in a facility in case of emergency.
  • the exit as well as emergency lights must meet the criteria imposed on them in terms of operational reliability and lighting capacity. These criteria include, for example, operation in case of a power outage, sufficient surface brightness of the exit light, and sufficiently high illuminance output by the emergency light.
  • exit lights and emergency lights different elements have been used for producing the lighting, as they are purposed for different uses.
  • Emergency lights are required to illuminate the environment, whereas the purpose of exit lights is to illuminate the indicator symbol of the lighting device.
  • the same light output refers to a light output apparatus, such as an LED board, outputting an equal luminous flux from the light source.
  • the luminous flux from the light source is sufficient to provide appropriate illumination for the exit light, the luminous flux of this light source will be too low in connection with the emergency light.
  • the object of the invention is to provide a lighting device and a method in connection with a lighting device so as to be able to solve the above mentioned problem.
  • the object of the invention is achieved with a lighting device and a method characterized by the features of the independent claims.
  • the preferred embodiments of the invention are presented in the dependent claims.
  • the advantage of the lighting device and the method for a lighting device according to the invention is that the light output apparatus may be used in an exit light as well as in an emergency light, and so the number of parts that need to be stored can be reduced. Further, installing the lighting device according to the invention and setting it up for operation is simple, because separate procedures are not required for configuring the light output apparatus during the installation.
  • Fig. 1 is a cross-sectional view of an implementation of one embodiment of the invention in connection with an exit light.
  • the lighting device comprises one or more light sources 1, such as LED light sources, and a structural element 3 configured to transmit light.
  • the structural element configured to transmit light such as a cover of the lighting device, is disposed at least partly in front of the light source.
  • the cover is attached to a lighting device body 5 or the like, the light source being entirely enclosed by the cover and the body.
  • the lighting device shown by Fig. 1 further comprises a light sensor 2 arranged in the lighting device to receive light of the one or more light sources that is reflected from the structural element 3 configured to transmit light.
  • Fig. 1 schematically shows how some of the light output by the light source 1 reflects back to the interior of the lighting device and hits the light sensor 2.
  • a light sensor refers to a component or a device having electrical properties that change by the effect of the light focused thereon. Such components may be for example photodiodes or phototransistors.
  • the light sensor 2 may also be a component that is adapted to receive a specific wavelength or wavelength band to avoid incorrect recognition. In this case the light sensor receives the light wavelength or wavelength band that is output with the light source in the lighting device.
  • the lighting device comprises control electronics connected to said one or more light sources and to the light sensor.
  • the control electronics are configured to determine the light output by said one or more light sources that is reflected to the light sensor from the structural element configured to transmit light.
  • the light sensor is thus electrically part of the control electronics for determining the amount of reflected light.
  • the control electronics together with the light sensor form an electric circuit that outputs a signal within said circuit as a function of the amount of light, which signal may be further utilized in the control electronics.
  • Fig. 1 shows that the structural element 3 configured to transmit light comprises a pictogram 4, whereby the lighting device is formed as an exit light.
  • the pictogram is disposed in the interior of the cover 3 of the lighting device.
  • the pictogram may also be provided on the exterior of the cover as a separate film, or it may be formed as part of the cover.
  • the pictogram represents, for example, an exit.
  • the cover may also have pre-installed holders on which the pictogram may be secured.
  • control electronics are configured to decrease the luminous flux output by the one or more light sources when the amount of the determined reflected light is greater than a specific limit.
  • the type of the lighting device may be concluded to be an exit light.
  • An exit light need not provide lighting in its surroundings, but it only needs to output sufficient surface brightness for the exit sign.
  • the amount of reflected light is determined in connection with switching-on of the lighting device.
  • the lighting device when the lighting device is switched on it is determined based on the reflected light whether it is an exit light or an emergency light.
  • the lighting device is controlled so as to provide lighting according to the type of the lighting device, and then the lighting device is left on to provide such lighting.
  • the light sensor is not necessarily used during the time of providing the lighting. However, it is also possible to use the light sensor during the operating time of the lighting device, and the amount of reflected light measured by this light sensor may be used for adjustment or control purposes.
  • the flow chart of Fig. 3 represents a method according to one embodiment of the invention in connection with a lighting device.
  • light is output 31 by one or more light sources, and light of said one or more light sources that is reflected from a structural element configured to transmit light is received 32 by a light sensor.
  • the light output by said one or more light sources that is reflected from the structural element configured to transmit light is determined 33, and the operation of said one or more light sources is controlled 34 in response to the determined light.
  • the method may be carried out with the lighting device according to the invention, and the method carried out with the lighting device and some of its embodiments have been described above in connection with the lighting device.
  • the information obtained from the light sensor may be used to automatically set the lighting device to operate continuously or non-continuously.
  • exit lights operate continuously, i.e. they are continuously on.
  • Emergency lights may operate non-continuously, such that they are only switched on in a battery-backed mode, also when power supply from the grid is lost.
  • the invention has been described above particularly with reference to an embodiment where the one or more light sources used are LED components. However, it is obvious that the light source used is freely selectable without affecting the implementation of the invention.
  • the features related to control of the light sources have not been described in detail in connection with the invention. In the field of lighting devices it is known per se that the luminous flux output by light sources may be adjusted.
  • the control electronics in the lighting device have also been described on a general level. The purpose of the control electronics in the invention is to carry out the determination of the reflected light together with the light sensor, and to control the luminous flux output by the light sources of the lighting device as appropriate, considering the type of the lighting device detected based on the amount of reflected light as described above.
  • Fig. 1 and 2 presenting the structures that illustrate the invention. It is obvious for a person skilled in the art that the structure of the lighting device may vary.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
EP18178517.1A 2017-06-29 2018-06-19 Beleuchtungsvorrichtung und verfahren in verbindung mit einer beleuchtungsvorrichtung Active EP3422821B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20175625A FI127633B (fi) 2017-06-29 2017-06-29 Valaisin ja menetelmä valaisimen yhteydessä

Publications (2)

Publication Number Publication Date
EP3422821A1 true EP3422821A1 (de) 2019-01-02
EP3422821B1 EP3422821B1 (de) 2021-10-27

Family

ID=62748740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18178517.1A Active EP3422821B1 (de) 2017-06-29 2018-06-19 Beleuchtungsvorrichtung und verfahren in verbindung mit einer beleuchtungsvorrichtung

Country Status (2)

Country Link
EP (1) EP3422821B1 (de)
FI (1) FI127633B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115419843A (zh) * 2022-08-30 2022-12-02 深圳市傲雷电商科技股份有限公司 一种头部组件及其移动照明设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150123956A1 (en) * 2013-11-05 2015-05-07 Canon Kabushiki Kaisha Image display apparatus, control method of image display apparatus, light source apparatus, and control method of light source apparatus
US20150359067A1 (en) * 2014-06-05 2015-12-10 Canon Kabushiki Kaisha Light source apparatus and display apparatus
US20160341655A1 (en) * 2015-05-20 2016-11-24 Goodrich Lighting Systems Gmbh Exterior aircraft lighting device
CA2993754A1 (en) * 2015-08-13 2017-02-16 Karl Leibinger Medizintechnik Gmbh & Co. Kg Surgical lamp with brightness regulation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150123956A1 (en) * 2013-11-05 2015-05-07 Canon Kabushiki Kaisha Image display apparatus, control method of image display apparatus, light source apparatus, and control method of light source apparatus
US20150359067A1 (en) * 2014-06-05 2015-12-10 Canon Kabushiki Kaisha Light source apparatus and display apparatus
US20160341655A1 (en) * 2015-05-20 2016-11-24 Goodrich Lighting Systems Gmbh Exterior aircraft lighting device
CA2993754A1 (en) * 2015-08-13 2017-02-16 Karl Leibinger Medizintechnik Gmbh & Co. Kg Surgical lamp with brightness regulation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115419843A (zh) * 2022-08-30 2022-12-02 深圳市傲雷电商科技股份有限公司 一种头部组件及其移动照明设备

Also Published As

Publication number Publication date
EP3422821B1 (de) 2021-10-27
FI20175625A1 (fi) 2018-10-31
FI127633B (fi) 2018-10-31

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