About 13 results
https://drivepatents.com/patents/968762 · 15 Oct 2014
There is described a system and method for controlling the intensity of a lighting system for vehicles comprising light emitting diodes mounted on printed circuit boards (PCBs). The method comprises sending a first modulation signal to the lighting modules...
https://drivepatents.com/patents/974659 · 21 May 2014
The method involves supplying intermediate circuit (20) to different output stages (30,30',80). The first output stage and the energy accumulator (120) are connected to a second output stage. The second output stage is brought into different operating stat...
https://drivepatents.com/patents/976702 · 9 Apr 2014
The emergency lighting device (1) has a charging connection (3), which is provided with a main voltage supply (U in) for charging of the energy storage unit (4). The operating switch (5) for operating the light source. The device has a control unit (2) to ...
https://drivepatents.com/patents/985635 · 13 Mar 2013
The lighting device comprises several lamps (1), and LEDs connected to a mains voltage operation unit (2) in normal operation. The operating unit is operated using a battery (5) in case of failure of mains voltage, in the emergency operation. A voltage det...
https://drivepatents.com/patents/1002156 · 23 May 2012
The emergency power supply device (1) has energy storage units (2) with plug connectors (3) to which power strips (4) are attached. The energy stored for emergency power supply in energy storage units, is measured at the power strips. The temperature senso...
https://drivepatents.com/patents/1012617 · 25 May 2011
The controller (5) has an input circuit (8) divided into a primary circuit (10) and a secondary circuit (11). The primary circuit is attached to an alternating current voltage source (9), and the secondary circuit is galvanically separated from the primary...
https://drivepatents.com/patents/1013018 · 18 May 2011
The emergency lighting device (1) has a charging connection (3), which is provided with a main voltage supply (U in) for charging of the energy storage unit (4). The operating switch (5) for operating the light source. The device has a control unit (2) to ...
https://drivepatents.com/patents/1079963 · 16 Feb 2005
The invention relates to an electronic circuit to be used in a self-contained emergency lighting in maintained mode, comprising an AC/DC input converter (1), a DC/DC converter (3), an electronic ballast (5) and an electronic control circuit (4). The electr...
https://drivepatents.com/patents/1080848 · 12 Jan 2005
An electronic power supply (10) for an emergency system to supply power to a fluorescent light (20) comprises a single output stage (13) to supply the fluorescent light (20) both in mains operation and in battery (30) operation.
https://drivepatents.com/patents/1099231 · 8 Jan 2003
An emergency lighting arrangement and an emergency lighting apparatus, the arrangement being configured to be coupled to a supply network and the arrangement comprising an electronic ballast for igniting and burning a fluorescent lamp, the emergency lighti...