Regulation of sequentially operating light source and device for carrying out the method

A device for sequentially operating a lighting system for signalizing a change of driving direction of a motor vehicle, the device comprising:

• a) a control element;
• b) a plurality of light emitting diodes (LEDs) connected to each other in series and connected to the control element;
• c) a feeding device connected to the control element and configured to control at least one LED of the plurality of LEDs;
• d) a thermal protection element connected to the control element, the resistance of the thermal protection element being dependent on temperature;
• e) an excess voltage protection element connected to the control element;
• f) a security element connected to the control element, wherein the security element is configured for when at least one LED of the plurality of LEDs fails the security element alerts a driver of the motor vehicle about said failure;
• g) a timer and shift element connected to the control element, wherein the timer and shift element is configured to sequentially active LEDs of the plurality of LEDs;
• and
• h) a reserve security element connected to the control element, wherein the reserve security element is configured to take over operation of any of components d)-g) when the component fails, wherein the control element is configured to control elements b)-h) such that elements b)-h) carry out their respective functions,
• and wherein the control element is configured for when the timer and shift element fails after a first LED of the plurality of LEDs is activated, and after lapse of a safety time frame, all remaining LEDs of the plurality of LEDs are activated by means of the reserve security element.