ADAPTATION SCHEME FOR LED CONNECTING TO BALLAST Russian patent published in 2017 - IPC H05B33/08 

FIELD: lighting.

SUBSTANCE: adaptation circuits (1) contain the conversion circuits (2) for converting voltage and current input signals, coming from the ballast circuit (8) into voltage and current output signals, intended for the light circuit. The conversion circuits (2) reduce the amplitudes of the voltage input signals up to the values below the predetermined values during the predetermined time intervals, after the electric power from the ballast circuits (8) is transferred to the conversion circuits (2). These time intervals are synchronized with the voltage input signals periods. Between the first discharge states for the power discharge and the second release states for the power release, the third states are introduced, such as holding states for power holding. These third states allow to the corresponding quantities, which test on itself the ballast circuits 8, to remain comparable to the situation, when gas-discharge lamps were powered.

EFFECT: possibility to replace the gas-discharge lamps with the light circuits with light-emitting diodes, while keeping the ballast circuits, intended for connection to gas-discharge lamps.

15 cl, 7 dwg