DRIVER CIRCUIT BETWEEN ELECTROMAGNETIC BALLAST AND LIGHT-EMITTING DIODE Russian patent published in 2018 - IPC H05B33/08 H05B37/02 

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. To protect electromagnetic ballasts (2) against damage, driver circuits (1) for coupling electromagnetic ballasts (2) to light circuits (3) comprising light emitting diodes are provided with rectifier bridges (11-14) for exchanging first current signals with electromagnetic ballasts (2) and for providing second current signals to light circuits (3), and with protection circuits (21-24, 25-27) for protecting electromagnetic ballasts (3) against parameters of the first current signals obtaining values larger than threshold values. Parameters may be direct-current components of the first current signals and may be average values of rectified versions of the first current signals / peak values of the first current signals. Rectifier bridges (11-14) may comprise first diode elements. Protection circuits (21-24, 25-27) may comprise second diode elements serially coupled to the first diode elements. Protection circuit may comprise average value detectors (25) / peak value detectors (26) and may comprise switches (27) for, in response to detection results, interrupting the second current signals.

EFFECT: technical result is the protection of electromagnetic ballasts from damage.

11 cl, 4 dwg