EP2658349A1 - Eclairage planaire - Google Patents

Eclairage planaire Download PDF

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Publication number
EP2658349A1
EP2658349A1 EP13165145.7A EP13165145A EP2658349A1 EP 2658349 A1 EP2658349 A1 EP 2658349A1 EP 13165145 A EP13165145 A EP 13165145A EP 2658349 A1 EP2658349 A1 EP 2658349A1
Authority
EP
European Patent Office
Prior art keywords
leds
surface light
light according
control unit
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.)
Withdrawn
Application number
EP13165145.7A
Other languages
German (de)
English (en)
Inventor
Michael BÖHNEL
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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 Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2658349A1 publication Critical patent/EP2658349A1/fr
Withdrawn legal-status Critical Current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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices

Definitions

  • each LED can be assigned to change means, in which case each LED means can be assigned to change.
  • the LEDs Due to the configuration according to the invention, that a change in the currents flowing through the LEDs, for example by bridging, is possible in the LEDs, there is now the possibility that individual or even several LEDs can be activated or deactivated independently of the other LEDs.
  • the LEDs are arranged in one or two-dimensional series and / or parallel circuits on the LED module and thus need not be individually controlled by a correspondingly complex interconnection.
  • the LEDs are accordingly individually controlled, whereas in the solution according to the invention, means are provided for modifying the currents flowing through the LEDs, which are assigned to the LEDs.
  • the LED module has a control unit for controlling the means for altering, wherein control information is stored in the control unit and the control unit is adapted to control the means for changing such that they are either in a normal mode or in a display mode, wherein, in the normal mode, the currents flowing through the LEDs are substantially unaltered by the means for variation, and in the display mode, the currents flowing through the LEDs are changed according to the control information.
  • the control unit may be configured to calculate from a logo, the corresponding control information for displaying the logo by the LEDs.
  • the means for altering may be controlled by the control unit so as to be in the display mode immediately after turning on the panel light for a predetermined time and then to switch to the normal mode.
  • the means for altering could also be controlled by the control unit so that they are in the normal mode in the switched-on state of the surface light and change to the display mode at the beginning of the turn-off, wherein the deactivation of the surface light for a predetermined time is delayed.
  • the means for altering are controlled by the control unit such that they are in the switched-on state of the areal light in the normal mode and in the off state in the display mode, the areal light then having an auxiliary supply, which in the off state to supply the LEDs is provided.
  • control unit in the display mode, a dynamic change of the currents flowing through the LEDs can also take place.
  • control unit can also have an interface through which the control unit new control information or new logos can be transmitted.
  • the LEDs can also be assigned optical means.
  • the invention provides that at least a portion of the LEDs 1 are assigned means that change the currents flowing through the LEDs 1 allow this, for example, by bridging individual LEDs 1 can happen.
  • FIG. 2 shows a corresponding circuit arrangement, in which a resistor 2 is arranged parallel to an LED 1.
  • a switch 3 is provided, with the help of which it can then be selected whether the current provided by the constant current source 4 flows either through the LED 1 or through the resistor 2. In the event that the current flows through the resistor 2, then the current through the LED 1 has been reduced to zero and thus changed.
  • FIG. 2 shown circuit arrangement it is thus possible to turn on or off individual LEDs 1 independently of the other LEDs 1.
  • a 1/4-watt LED could use a 1/4-watt resistor.
  • each LED 1, a resistor 2 and a switch 3 according to the in FIG. 2 associated circuit arrangement is assigned. Accordingly, it is now possible that each LED 1 of in FIG. 3 shown individually bridged and thus can be switched on and off. At the same time, however, is ensured in the event that, for example, only the first LED 1 in the first strand or bridged, ensured by the resistor 2 that still the current of Kontantstrom provoke 4 is approximately evenly distributed to the LED strands and thus no danger to the other, still connected, LEDs 1 exists.
  • each LED itself is individually connected and controlled, is accordingly provided in the surface light according to the invention, as before, that the LEDs are still arranged in a series and / or parallel connection. Nevertheless, the means for changing the possibility to change the currents flowing through the LEDs, for example, by bridging the LEDs to reduce the current to zero.
  • the logo of a manufacturer or a simple picture for example, when turning on the surface light, are displayed, whereby a customer gets the opportunity to move the brand of its surface light by presenting a manufacturer's logo in the focus.
  • the surface light according to the invention has a control unit.
  • a surface lamp is shown which includes a corresponding control unit 5.
  • the LEDs 1 according to the in FIG. 3 arranged arrangement or interconnected.
  • the control unit 5 in each case has a connection to the switches 3 and thereby can control or change the switching state of each switch 3.
  • the control unit 5 is therefore designed to control the switches 3 in such a way that they already exist between the two FIG. 2 change explained switching states. This is, on the one hand, a switching state in which the current flows through the LEDs 1 and, on the other hand, a switching state in which the current flows through the resistors 2.
  • control unit 5 can additionally have an interface 6, by which the control unit 5 either corresponding control information or logos or images are transmitted.
  • control information can already be stored in the control unit 5 during the production of the surface light.
  • new or additional control information or logos or images are stored in the control unit 5 via the interface 6, whereby a subsequent change of the logo or image shown is possible.
  • the interface 6 may be, for example, a direct attachment possibility for a PC or a similar device. Alternatively, the interface 6 could also be intended to be connected to a corresponding bus.
  • the normal mode is selected in the switched-on state and is then switched to the display mode at the beginning of the switch-off process, wherein the complete deactivation of the surface light is delayed in this case for a predetermined time.
  • the display mode is selected in the switched-on state of the areal light and in the switched-off state, whereby the areal light in the switched-on state again behaves like a surface light already known from the prior art.
  • the off state in which the surface light has not been used at all, but then it is possible to display, for example, a corresponding manufacturer logo. It should be noted, however, that the supply of the surface light in the off state is not given, which is why the surface light then has an auxiliary supply, which is provided in the off state to supply the LEDs.
  • the surface light of the invention has mostly white LEDs. It is also conceivable, however, that different colored LEDs can be used.
  • the means of change in addition to bridging the LEDs can also allow dimming of the LEDs.
  • the means of change in addition to bridging the LEDs can also allow dimming of the LEDs.
  • one or more Normalizing resistors in the parallel LED strings are required to prevent different amounts of current from flowing through the LEDs.

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
EP13165145.7A 2012-04-26 2013-04-24 Eclairage planaire Withdrawn EP2658349A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012206889.9A DE102012206889B4 (de) 2012-04-26 2012-04-26 Flächenleuchte

Publications (1)

Publication Number Publication Date
EP2658349A1 true EP2658349A1 (fr) 2013-10-30

Family

ID=48193112

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13165145.7A Withdrawn EP2658349A1 (fr) 2012-04-26 2013-04-24 Eclairage planaire

Country Status (2)

Country Link
EP (1) EP2658349A1 (fr)
DE (1) DE102012206889B4 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014224635A1 (de) * 2014-12-02 2016-06-16 Zumtobel Lighting Gmbh LED-Modul
DE102017011624A1 (de) 2017-12-15 2019-06-19 Drägerwerk AG & Co. KGaA Beleuchtungsvorrichtung, Operationsleuchte, Verfahren und Computerprogramm zur Steuerung einer Vielzahl von Leuchtelementen in einer Beleuchtungsvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1750486A1 (fr) * 2005-07-29 2007-02-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Dispositif avec multiple matrices de LEDs, matrice de LEDs et son méthode de fabrication
WO2008149294A1 (fr) * 2007-06-08 2008-12-11 Koninklijke Philips Electronics N.V. Circuit de commande pour commander plusieurs sources de lumière agencées dans une configuration en série

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4271408A (en) * 1978-10-17 1981-06-02 Stanley Electric Co., Ltd. Colored-light emitting display
WO2007080984A1 (fr) * 2006-01-13 2007-07-19 Sharp Kabushiki Kaisha Dispositif d'eclairage et dispositif d'affichage a cristaux liquides
US20090140835A1 (en) * 2007-12-03 2009-06-04 Tung-Hsin You LED lamp control apparatus
US20110121741A1 (en) * 2008-10-01 2011-05-26 Sharp Kabushiki Kaisha Planar illuminating device and display device provided with same
US8901829B2 (en) * 2009-09-24 2014-12-02 Cree Led Lighting Solutions, Inc. Solid state lighting apparatus with configurable shunts
US8476836B2 (en) * 2010-05-07 2013-07-02 Cree, Inc. AC driven solid state lighting apparatus with LED string including switched segments

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1750486A1 (fr) * 2005-07-29 2007-02-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Dispositif avec multiple matrices de LEDs, matrice de LEDs et son méthode de fabrication
WO2008149294A1 (fr) * 2007-06-08 2008-12-11 Koninklijke Philips Electronics N.V. Circuit de commande pour commander plusieurs sources de lumière agencées dans une configuration en série

Also Published As

Publication number Publication date
DE102012206889A1 (de) 2013-10-31
DE102012206889B4 (de) 2022-08-25

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