Modular LED Lighting System Having Emergency Light Function

• US 20130147269A1
• Filed: 04/11/2011
• Published: 06/13/2013
• Est. Priority Date: 04/09/2010
• Status: Active Grant

• Current Assignee: Tridonic AG (Zumtobel Group AG), Tridonic UK, Ltd. (Zumtobel Group AG)
• Original Assignee: Tridonic AG (Zumtobel Group AG), Tridonic UK, Ltd. (Zumtobel Group AG)
• Inventors: Zimmermann, Michael, Keller, Ueli, Wilson, Ian
• Granted Patent: US 10,143,064 B2
• Time in Patent Office: Days
• US Class Current: 307/23
• CPC Class Codes: H02J 9/02 in which an auxiliary distribution system and its associated lamps are brought into service
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: H05B 45/327 Burst dimming
• CPC Class Codes: H05B 45/3725 Switched mode power supply [SMPS]
• CPC Class Codes: H05B 45/382 with galvanic isolation between input and output
• CPC Class Codes: H05B 45/39 Circuits containing inverter bridges
• CPC Class Codes: H05B 45/46 having LEDs disposed in parallel lines
• CPC Class Codes: H05B 47/10 Controlling the light source
• CPC Class Codes: H05B 47/18 via data-bus transmission
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The invention relates to a modular LED lighting unit, comprising a first module (1) to which an AC supply voltage (9) can be supplied and which comprises: a second sub-module (B), at the output of which a DC supply voltage (5) is provided which is galvanically isolated from the AC supply voltage (9), and a control unit (G), further comprising a second module (2) which comprises a further sub-module (C) supplied with the DC supply voltage (5) of the first module (1), in particular a pulsed constant current source, which is controlled by a control unit (E) of the second module (2), an LED module (F) which has at least one LED range (8) and is supplied by the further sub-module (C), in particular a constant current source, and an emergency light operating circuit which is connected to a rechargeable energy store (ES); and takes over powering the modular LED lighting unit in the event of failure of the AC supply voltage (9).

Claims

1. A modular LED lighting having a first module (1) to which an AC supply voltage (9) can be supplied and which has:

a second submodule (B), at the output of which a DC supply voltage (5) electrically isolated from the AC supply voltage (9) is provided, and

a control unit (G), furthermore having a second module (2), preferably a lamp management module, which has a further submodule (C), supplied with the DC supply voltage (5) of the first module (1), in particular a clocked constant-current source which is controlled by a control unit (E) of the second module (2),

an LED module (F) which has at least one LED path (8) and which is supplied by the further submodule (C), in particular by a constant-current source, and an emergency light operating circuit which is connected to a rechargeable energy store (ES) and takes over the feeding of the modular LED lighting in the event of failure of the AC supply voltage (9).

2. The LED lighting as claimed in claim 1, wherein the emergency light operating circuit contains a charging circuit (80) for the rechargeable energy store (ES), wherein the latter is recharged when AC supply voltage (9) is present and wherein the charging circuit (80) preferably has a flyback converter.

3. The LED lighting as claimed in claim 2, wherein the charging circuit (80) is coupled to the second submodule (B), preferably by means of an additional secondary winding (83).

4. The LED lighting as claimed in claim 2, wherein the charging circuit (80) is designed as a converter circuit additionally present in the first module (1), which circuit is isolated and is fed by the AC supply voltage (9).

16. The LED lighting as claimed in claim 1, wherein in the event of failure of the AC supply voltage (9), the emergency light operating circuit takes over the feeding of the second module (2) via the DC supply voltage (5) and preferably also the feeding of a low-voltage supply (V_CCS) on the secondary side for the second module (2).

17. The LED lighting as claimed in claim 1, wherein, in the event of failure of the AC supply voltage (9), an external communication (10) is still maintained, for example in accordance with the DALI standard.

18. The LED lighting as claimed in claim 1, wherein the control unit (G) of the first module (1) and the control unit (E) of the second module (2) are in internal data communication via a communication interface (6) and the internal data communication is preferably standardized, i.e. is independent of an external bus communication of the first module (1).

19. The LED lighting as claimed in claim 18, wherein, in the event of failure of the AC supply voltage (9), the internal communication between the first module (1) and the second module (2) is still maintained.

20. The LED lighting as claimed in claim 1, wherein the emergency light operating circuit, in the event of failure of the AC supply voltage (9), supplies the second module (2) with a voltage level deviating from the normal DC supply voltage (5) of the first module (1), wherein the second module (2) identifies this deviation and alters the operation of the LED module (F).

21. The LED lighting as claimed in claim 20, wherein the second module (2) switches over to an emergency light brightness value and/or to an emergency light color, in particular if the second module (2) receives no control signals from the first module (1).

22. The LED lighting as claimed in claim 1, wherein the emergency light operating circuit has a discharge circuit (81) which preferably has a buck-boost converter and which serves for feeding from the rechargeable energy store (ES) in the emergency light situation.

23. The LED lighting as claimed in claim 22, wherein the discharge circuit (81) is designed as part of the first module (1) and in addition to the second submodule (B).

24. The LED lighting as claimed in claim 22, wherein the discharge circuit (81) is coupled to the second submodule (B).

25. The LED lighting as claimed in claim 1, wherein the rechargeable energy store (ES) has a rechargeable battery and/or a capacitor such as, for example, a “

Gold-Cap”

.

26. The LED lighting as claimed in claim 1, wherein dimming and a color change can be carried out even in the case of emergency light.

5-15. -15. (canceled)