WO2013083869A1 - Guide light and a method for using it - Google Patents

Guide light and a method for using it Download PDF

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Publication number
WO2013083869A1
WO2013083869A1 PCT/FI2011/051093 FI2011051093W WO2013083869A1 WO 2013083869 A1 WO2013083869 A1 WO 2013083869A1 FI 2011051093 W FI2011051093 W FI 2011051093W WO 2013083869 A1 WO2013083869 A1 WO 2013083869A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
exit
orientation image
image
patterning
Prior art date
Application number
PCT/FI2011/051093
Other languages
French (fr)
Inventor
Thomas THODEN
Matti Tarvainen
Original Assignee
Hedengren 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 Hedengren Oy filed Critical Hedengren Oy
Priority to PCT/FI2011/051093 priority Critical patent/WO2013083869A1/en
Publication of WO2013083869A1 publication Critical patent/WO2013083869A1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
    • G08B7/062—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources indicating emergency exits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0409—Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0418—Constructional details
    • G09F2013/05—Constructional details indicating exit way or orientation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals

Definitions

  • the present invention relates to an exit light according to the preamble to Claim 1.
  • the invention also relates to a method for using and controlling the exit light.
  • the invention relates to an exit light, which is used in buildings to guide people actively by giving prior warning in emergency situations.
  • such lights can be powered from a centralized power-supply system, or they can operate independently (contain their own power supply).
  • Exit lights are primarily intended to guide the people in a building in the correct direction in an emergency.
  • Exit lights according to the prior art are passive, in other words their appearance remains unchanged, irrespective of whether the situation is normal or an emergency.
  • the exit-light system may guide the people in the building in the wrong direction, for example, towards the fire.
  • the invention is intended to eliminate at least some of the aforementioned drawbacks of the prior art and create an entirely new type of exit light and method for controlling it.
  • the exit light according to the invention is implemented in such a way that it is formed of a multi-layer construction, in which there is at least one transparent planar element between the viewer of the orientation sign and the actual sign image, and the element in question can be illuminated independently of the normal lighting.
  • the device according to the invention is characterized by what is stated in the characterizing portion of Claim 1.
  • the method according to the invention is, for its part, characterized by what is stated in the characterizing portion of Claim 9.
  • Figure 1 shows a perspective view of one exit light according to the invention.
  • Figure 2 shows an exploded diagram of the exit light of Figure 1.
  • Figure 3 shows the image of Figure 2 as an outline drawing.
  • Figure 4 shows the solution of Figure 1 as an outline drawing.
  • Figure 5 shows an alternative presentation of the solution of Figure 2.
  • Figure 6 shows a second alternative presentation of the solution of Figure 2.
  • Figure 7 shows an alternative presentation of the solution of Figure 1.
  • Figure 8 shows the transmission of light of the element according to the invention in the element.
  • Figure 9 shows the solution of Figure 2, in which the second display element has been activated.
  • FIG. 10 shows the system according to the invention.
  • the invention is thus generally based on an additional orientation image being formed with the aid of at least one additional light source in the exit light and a transparent element connected to this in special situations, typically in emergencies.
  • additional orientation image being formed with the aid of at least one additional light source in the exit light and a transparent element connected to this in special situations, typically in emergencies.
  • the multi-layer illuminated sign is intended to produce a light image, which can be changed.
  • the light image is visible when light is directed to the desired layer of the illuminated sign.
  • an animated exit route for example, can be implemented, by moving the image in a specific direction, for example by alternating the illumination of different panels.
  • the image on the illuminated panel can be made is several ways, for instance by mechanical machining, by casting, by printing, and by laser machining.
  • the image of the illuminated panel of the prototype of the invention has been made by laser machining, using the following parameters:
  • Sei Laser NRG 120W Values 2700V (cm/min) 20A m/s2 25 %.
  • the image in the illuminated panel sign appears when the light directed to it comes at a specific predefined angle. When the angle is less, the image does not appear.
  • the critical angle for the refraction of light depends on the material of the sign.
  • the material is clear acryl and its critical angle is about 43 degrees. This is illustrated in Figure 8.
  • Illumination by means of a light conductor from the edge realizes the exceeding of the critical angle for light, so that the image appears.
  • the image will also not be visible.
  • Light must be prevented from coming to the edges from other than the light source, as it will case the images to be detrimentally visible. In this implementation, this is preventing by means of an edge band.
  • the image of the outer layer does not interfere with the visibility of the image underneath, because light coming from behind and orthogonal to the panel will not exceed the critical angle for refraction.
  • the panels are illuminated by LED elements at the upper edge.
  • the light-distribution plate 1 scatters the light by distributing the white LED light arriving at its edge as evenly as possible under the background image 3, i.e. behind it when examined from the viewing direction.
  • 2 back-plate
  • the back-plate 2 prevents the sign from being seen from behind and, in addition, improves the properties of the light-distribution plate 1.
  • the colour of the back-plate 2, towards the light-distribution plate should be pale, preferably white.
  • orientation image 3 appears as the base image of the multi-layer exit light.
  • An image 4a which is visible when the edge light of this sign is active, is made in the panel 4.
  • Edge illumination is implemented by means of an auxiliary light source 6 connected to the frame 7, typically a LED light, which is realized using printed-circuit technology.
  • the printed circuit 6 there is one row of LED elements for each changeable-image panel 4 and 5 and, in addition, a row for possible illuminated background images.
  • the number and colour of the elements for a panel depend on the desired brightness and colour of the image.
  • the patterning 4a of the panel 4 is implemented, for example, by means of small recesses in the surface of the panel 4, in such a way that, in a normal state, the image is transparent.
  • the sign/background image is visible underneath.
  • Alternatives for patterning are drill holes or grooves using the above principle.
  • the term exit light 51 refers to any guiding light whatever in buildings, which can be fed from a centralized power-supply system, or which can operate independently (including its own power supply).
  • the term viewing direction refers to the direction from which the orientation/background image 3 is examined.
  • the back-plate 2 is typically the rear-most element and the panels 4 and 5, together with their images, are in the front part of the exit light, or are even in the very front, when examined from the viewing direction.
  • the lighting direction of the orientation image is not important.
  • the orientation image 3 and each transparent panel 4 can be illuminated from any side whatever, even in such a way that each panel is illuminated from different directions.
  • each panel can be illuminated by means of an independently controlled light source.
  • Figure 9 shows an 'exploded view' of the solution according to Figure 1, in which the image 4a of panel 4 is illuminated.
  • the exit lights 51, 51 ' of the system are controlled in such a way that, always according to the emergency situation, the exit lights are switched to either the normal state 51 or to the controlled state 5 , in which case the controlled state gives a different sign to the normal state.
  • the exit lights include either wireless communications means or, alternatively, a wired control system 52, by means of which the exit lights 51, 51 ' are directed, always according to the situation, to display the desired view.
  • the control of the exit lights can be implemented in a wired form using dedicated wiring, by means of wireless control, or in a wired form using control-signal input taking place through the power-supply wiring.
  • the term transparent patterning 4a refers to patterning 4a, through which in a normal situation (essentially a smokeless or vapourless space) the orientation image 3 is visible from the normal viewing direction, which is at a 0 - 90° angle relative to the plane of the sign light 51.
  • the opacity of the patterning must typically be in the order of a per mille, in other words the transparency should be preferably more than 99 %, in the part of the panel with the patterning 4a.
  • the exit light 51 can also be an active display panel, such as an LCD or plasma display, which is controlled by means of the control system 52.
  • a prism can be used to focus the illumination of the orientation image 3 or patterning 4a.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

The invention relates to an exit light (51), which comprises an orientation image (3) and a light (6), by means of which the orientation image can be illuminated and in which case the orientation image (3) is examined from the viewing direction (20). According to the invention, when examined from the viewing direction, at least one transparent panel (4) is located in front of the orientation image (3), and an independently controlled light source (6) is connected to it, and the panel (4) comprises essentially transparent patterning (4a).

Description

Guide light and a method for using it
The present invention relates to an exit light according to the preamble to Claim 1.
The invention also relates to a method for using and controlling the exit light.
The invention relates to an exit light, which is used in buildings to guide people actively by giving prior warning in emergency situations. Typically, such lights can be powered from a centralized power-supply system, or they can operate independently (contain their own power supply). Exit lights are primarily intended to guide the people in a building in the correct direction in an emergency.
Exit lights according to the prior art are passive, in other words their appearance remains unchanged, irrespective of whether the situation is normal or an emergency.
Thus in the case of a fire, for example, the exit-light system may guide the people in the building in the wrong direction, for example, towards the fire.
The invention is intended to eliminate at least some of the aforementioned drawbacks of the prior art and create an entirely new type of exit light and method for controlling it. The exit light according to the invention is implemented in such a way that it is formed of a multi-layer construction, in which there is at least one transparent planar element between the viewer of the orientation sign and the actual sign image, and the element in question can be illuminated independently of the normal lighting.
More specifically, the device according to the invention is characterized by what is stated in the characterizing portion of Claim 1.
The method according to the invention is, for its part, characterized by what is stated in the characterizing portion of Claim 9.
Considerable benefits are achieved by means of the invention.
By means of the element according to the invention people can be actively prevented from entering dangerous places, such as one that on fire, while on the other hand rescue personnel and fire-fighters can also be guided in the correct direction. The technical implementation of the invention is extremely economical and, due to its simplicity, also highly reliable even in emergencies.
In the following, the invention will be examined with the aid of the accompanying figures, in which Figure 1 shows a perspective view of one exit light according to the invention.
Figure 2 shows an exploded diagram of the exit light of Figure 1.
Figure 3 shows the image of Figure 2 as an outline drawing.
Figure 4 shows the solution of Figure 1 as an outline drawing.
Figure 5 shows an alternative presentation of the solution of Figure 2. Figure 6 shows a second alternative presentation of the solution of Figure 2.
Figure 7 shows an alternative presentation of the solution of Figure 1.
Figure 8 shows the transmission of light of the element according to the invention in the element.
Figure 9 shows the solution of Figure 2, in which the second display element has been activated.
Figure 10 shows the system according to the invention.
The invention is thus generally based on an additional orientation image being formed with the aid of at least one additional light source in the exit light and a transparent element connected to this in special situations, typically in emergencies. In the description of the invention, the following terminology will be used:
1 light-distribution plate
2 back-plate
3 orientation image or background image
4 panel 1 4a panel patterning
5 next panel
6 LED printed-circuit light
7 frame 20 viewing direction
50 central unit
51 exit light
51 ' exit light activated
52 control system The multi-layer illuminated sign is intended to produce a light image, which can be changed. The light image is visible when light is directed to the desired layer of the illuminated sign.
Though, in the embodiment of the invention shown, there are two changeable illuminated-panel layers, the number of these is not limited. The patterning of the illuminated panels is completely unrestricted. In order to achieve the desired image, several illuminated panels can be illuminated simultaneously. An always-visible passive or back-lit image can be located on the base of the first illuminated image, as has been done in this implementation.
By means of the invention, an animated exit route, for example, can be implemented, by moving the image in a specific direction, for example by alternating the illumination of different panels.
The image on the illuminated panel can be made is several ways, for instance by mechanical machining, by casting, by printing, and by laser machining.
The image of the illuminated panel of the prototype of the invention has been made by laser machining, using the following parameters:
Tool: Sei Laser NRG 120W Values: 2700V (cm/min) 20A m/s2 25 %.
The image in the illuminated panel sign appears when the light directed to it comes at a specific predefined angle. When the angle is less, the image does not appear.
The critical angle for the refraction of light depends on the material of the sign. In this implementation, the material is clear acryl and its critical angle is about 43 degrees. This is illustrated in Figure 8.
Illumination by means of a light conductor from the edge realizes the exceeding of the critical angle for light, so that the image appears. When the light is not lit at the edge of the panel in question, the image will also not be visible. Light must be prevented from coming to the edges from other than the light source, as it will case the images to be detrimentally visible. In this implementation, this is preventing by means of an edge band.
The image of the outer layer does not interfere with the visibility of the image underneath, because light coming from behind and orthogonal to the panel will not exceed the critical angle for refraction.
In this implementation, the panels are illuminated by LED elements at the upper edge.
The following describes the construction of the multi-layer exit light according to the invention:
The reference numerals refer to the reference numerals of the figures and the invention will in particular be examined on the basis of Figure 3
1 : light-distribution plate
The light-distribution plate 1 scatters the light by distributing the white LED light arriving at its edge as evenly as possible under the background image 3, i.e. behind it when examined from the viewing direction. 2: back-plate The back-plate 2 prevents the sign from being seen from behind and, in addition, improves the properties of the light-distribution plate 1. The colour of the back-plate 2, towards the light-distribution plate should be pale, preferably white.
3 : orientation/background image The orientation image 3 appears as the base image of the multi-layer exit light.
4: panel 1
An image 4a, which is visible when the edge light of this sign is active, is made in the panel 4. Edge illumination is implemented by means of an auxiliary light source 6 connected to the frame 7, typically a LED light, which is realized using printed-circuit technology.
6: LED printed circuit
In the printed circuit 6, there is one row of LED elements for each changeable-image panel 4 and 5 and, in addition, a row for possible illuminated background images. The number and colour of the elements for a panel depend on the desired brightness and colour of the image.
In the prototype of the invention, there are two rows of LEDs with 8 LEDs in each row. The colours of the LED rows are white and red.
7: frame
This supports the structure to form a single totality and includes a place for the LED printed circuit 6.
4a: panel patterning
The patterning 4a of the panel 4 is implemented, for example, by means of small recesses in the surface of the panel 4, in such a way that, in a normal state, the image is transparent. The sign/background image is visible underneath. Alternatives for patterning are drill holes or grooves using the above principle. In the present application, the term exit light 51 refers to any guiding light whatever in buildings, which can be fed from a centralized power-supply system, or which can operate independently (including its own power supply).
In the present application, the term viewing direction refers to the direction from which the orientation/background image 3 is examined. Thus, the back-plate 2 is typically the rear-most element and the panels 4 and 5, together with their images, are in the front part of the exit light, or are even in the very front, when examined from the viewing direction.
According to the invention, the lighting direction of the orientation image is not important. The orientation image 3 and each transparent panel 4 can be illuminated from any side whatever, even in such a way that each panel is illuminated from different directions.
Instead of LED printed circuits, each panel can be illuminated by means of an independently controlled light source. Figure 9 shows an 'exploded view' of the solution according to Figure 1, in which the image 4a of panel 4 is illuminated.
According to Figure 10, the exit lights 51, 51 ' of the system are controlled in such a way that, always according to the emergency situation, the exit lights are switched to either the normal state 51 or to the controlled state 5 , in which case the controlled state gives a different sign to the normal state. To implement the control, the exit lights include either wireless communications means or, alternatively, a wired control system 52, by means of which the exit lights 51, 51 ' are directed, always according to the situation, to display the desired view.
The control of the exit lights can be implemented in a wired form using dedicated wiring, by means of wireless control, or in a wired form using control-signal input taking place through the power-supply wiring.
In the present application, the term transparent patterning 4a refers to patterning 4a, through which in a normal situation (essentially a smokeless or vapourless space) the orientation image 3 is visible from the normal viewing direction, which is at a 0 - 90° angle relative to the plane of the sign light 51. In order to meet the above condition, the opacity of the patterning must typically be in the order of a per mille, in other words the transparency should be preferably more than 99 %, in the part of the panel with the patterning 4a.
In the method according to the invention, the exit light 51 can also be an active display panel, such as an LCD or plasma display, which is controlled by means of the control system 52.
According to the invention, a prism can be used to focus the illumination of the orientation image 3 or patterning 4a.

Claims

Claims:
1. Exit light (51) which comprises an orientation image (3) and a light (6), by means of which the orientation image can be illuminated, and in which case the orientation image (3) is examined from the viewing direction (20), characterized in that examined from the viewing direction, at least one transparent panel (4), to which an independently controllable light source (6) is connected, is located in front of the orientation image (3), and the panel (4) comprises essentially transparent patterning (4a).
2. Exit light according to Claim 1, characterized in that a LED-light row (6) is used as the light source.
3. Exit light (51) according to Claim 1 or 2, characterized in that several transparent panels (4), equipped with patterning and an independently controllable light source, are located in front of the orientation image (3).
4. Exit light (51) according to any of the above Claims, characterized in that at least one light source is an edge light (6), by means of which the orientation image (3) or the transparent patterning (4a) can be illuminated from at least one edge.
5. Exit light (51) according to any of the above Claims, characterized in that the illumination takes place through a prism.
6. System for controlling an exit light, which comprises a central unit (50) and several exit lights (51) connected to it, characterized in that the system comprises means (52) for controlling several exit-light-specific (51) lights (6) independently of each other, in order to create different sign images (4a).
7. System according to Claim 5, characterized in that LED-light rows (6) are used to form the sign images (4a).
8. System according to Claim 5 or 6, characterized in that transparent panels (4) equipped with patterning (4a) and an independently controllable light source (6) are used in it, several of which panels are placed in front of the orientation image (3)·
9. System according to any of the above Claims, characterized in that its illumination takes place through a prism.
10. Method for controlling an exit light, in which method several exit lights (51) are controlled centrally (50), characterized in that, in the method, several exit-light- specific (51) lights (6) are controlled in order to create different sign images (4a).
11. Method according to Claim 9, characterized in that LED-light rows (6) are used as the light source.
12. Method according to Claim 9 or 10, characterized in that several transparent panels (4), equipped with patterning and an independently controllable light source, are placed in front of the orientation image (3).
13. Method according to any of the above Claims, characterized in that its illumination takes place through a prism.
14. Method according to any of the above Claims, characterized in that the exit light is an active display panel, such as an OLED, LCD, or plasma display, which is controlled using a central unit.
PCT/FI2011/051093 2011-12-09 2011-12-09 Guide light and a method for using it WO2013083869A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2011/051093 WO2013083869A1 (en) 2011-12-09 2011-12-09 Guide light and a method for using it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2011/051093 WO2013083869A1 (en) 2011-12-09 2011-12-09 Guide light and a method for using it

Publications (1)

Publication Number Publication Date
WO2013083869A1 true WO2013083869A1 (en) 2013-06-13

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EP2889848A1 (en) * 2013-12-27 2015-07-01 CEAG Notlichtsysteme GmbH Lamp
DE102014203036A1 (en) * 2014-02-19 2015-08-20 Ceag Notlichtsysteme Gmbh lamp
DE102015218161A1 (en) * 2015-09-22 2017-03-23 Fischer Akkumulatorentechnik Gmbh Emergency sign light with electronic memory
GB2562171A (en) * 2017-05-03 2018-11-07 Noel Mcdonagh Bernard An emergency exit sign
US20220392321A1 (en) * 2019-11-14 2022-12-08 Zumtobel Lighting Gmbh Dynamic and/or adaptive signposting system
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DE202022100048U1 (en) 2022-01-04 2023-04-14 Zumtobel Lighting Gmbh safety sign light
JP7481679B2 (en) 2020-12-29 2024-05-13 東芝ライテック株式会社 Display device

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GB2451955A (en) * 2007-08-17 2009-02-18 Zumtobel Lighting Gmbh Electronic illuminated sign with image memory, in particular for emergency escape route indication.
US20090219734A1 (en) * 2008-02-28 2009-09-03 Omron Corporation Display device
WO2010142843A1 (en) * 2009-06-08 2010-12-16 Marimils Oy Display system and display apparatus

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EP0962693A1 (en) * 1998-06-03 1999-12-08 Frank R. Dipl.-Ing. Müller Display device with variable presentation
FI5260U1 (en) * 2000-12-04 2002-02-19 Talstila Pekka Sign or billboard
WO2004076915A1 (en) * 2003-02-25 2004-09-10 Jae-Sul Son Escape way direction system
US20070069882A1 (en) * 2005-09-27 2007-03-29 Kamal Mahajan Intelligent exit sign
EP1906219A1 (en) * 2006-09-28 2008-04-02 DIN-Dietmar Nocker Facilitymanagement GmbH Device for evacuating persons
GB2451955A (en) * 2007-08-17 2009-02-18 Zumtobel Lighting Gmbh Electronic illuminated sign with image memory, in particular for emergency escape route indication.
US20090219734A1 (en) * 2008-02-28 2009-09-03 Omron Corporation Display device
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Cited By (15)

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Publication number Priority date Publication date Assignee Title
EP2889848A1 (en) * 2013-12-27 2015-07-01 CEAG Notlichtsysteme GmbH Lamp
DE102013022119A1 (en) * 2013-12-27 2015-07-02 Ceag Notlichtsysteme Gmbh lamp
EP2889848B1 (en) 2013-12-27 2016-10-19 Eaton Safety IP GmbH & Co. KG Lamp
DE102014203036A1 (en) * 2014-02-19 2015-08-20 Ceag Notlichtsysteme Gmbh lamp
EP2911141A1 (en) * 2014-02-19 2015-08-26 CEAG Notlichtsysteme GmbH Lamp
DE102015218161A1 (en) * 2015-09-22 2017-03-23 Fischer Akkumulatorentechnik Gmbh Emergency sign light with electronic memory
GB2562171A (en) * 2017-05-03 2018-11-07 Noel Mcdonagh Bernard An emergency exit sign
GB2569053A (en) * 2017-05-03 2019-06-05 Bisley Ip Ltd An emergency exit sign
GB2569053B (en) * 2017-05-03 2020-01-01 Bisley Ip Ltd An emergency exit sign
GB2562171B (en) * 2017-05-03 2021-10-27 Evaclite Ltd An emergency exit sign
US20220392321A1 (en) * 2019-11-14 2022-12-08 Zumtobel Lighting Gmbh Dynamic and/or adaptive signposting system
US11935396B2 (en) * 2019-11-14 2024-03-19 Zumtobel Lighting Gmbh Dynamic and/or adaptive signposting system
JP7481679B2 (en) 2020-12-29 2024-05-13 東芝ライテック株式会社 Display device
NO20210918A1 (en) * 2021-07-20 2023-01-23 Prolink Int As An Illuminated Sign
DE202022100048U1 (en) 2022-01-04 2023-04-14 Zumtobel Lighting Gmbh safety sign light

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