TRAFFIC LIGHT APPARATUS ON BASE OF LIGHT-EMITTING DIODES Russian patent published in 2004 - IPC

FIELD: regulation devices arranged along motion route of trains or locomotives.

SUBSTANCE: traffic light apparatus includes transistor cascade having N transformers as load and controlled by means of pulse generator. Said transistor cascade is connected through contact of signaling relay to electric power source; N groups of light emitting diodes. Each of said groups has K light-emitting diodes connected in series and it is connected with secondary winding of respective transformer. Apparatus also includes N Zener diodes, N first and N second protection diodes, N resistors and OR-gate. Ends of secondary winding of N transformers are connected to anodes of N first and N second protection diodes whose cathodes are connected with anodes of first light-emitting diodes of each of N groups of light emitting diodes and with cathodes of N Zener diodes respectively. Anodes of Zener diodes are connected with first outlets of N resistors and with inlets of OR gate. Common outlet of OR-gate is connected with second outlets of N resistors and with cathodes of last of K light emitting diodes of each of N groups of light emitting diodes.

EFFECT: possibility for inspection of operating groups of light emitting diodes that provides enhanced operational reliability of traffic light apparatus.

1 dwg