BRIGHTNESS CONTROL CIRCUIT OF LED MODULE WITH DIRECT SUPPLY OF ALTERNATING CURRENT Russian patent published in 2017 - IPC H05B37/00 

FIELD: lighting.

SUBSTANCE: invention relates to LED light source module control circuit. Result is achieved by fact, that AC circuit for controlling LED brightness comprises rectifier and N cascades of DC circuits for control of LED. In DC circuit of i-th cascade for control of LED first end of i-th unit of selection of voltage and inlet end of i-th module of LED light source directly or indirectly receives output voltage of rectifier; end of voltage divider of i-th unit of selection of voltage is connected to second inlet end of i-th unit of switching; first inlet end of i-th unit of switching is connected to outlet end of i-th module of LED light source, and outlet end of i-th unit of switching, second end of i-th unit of selection of voltage and second output end of rectifier are grounded. When i-th unit of switching is switched on, modules of LED light source from first to i-th emit light. When i-th unit of switching is switched off, if i is less than N, modules of LED light source from first to (i+1)-th emit light, and if i is equal to N, modules of LED light source from first to N-th, stop emitting light. Such design of LED light source module with direct supply of alternating current also provides absence of flicker in case of AC voltage fluctuations.

EFFECT: technical result consists in provision of LED light source module circuit with direct supply of alternating current and, in particular brightness control circuit, which is compatible with semiconductor device of brightness control.

18 cl, 4 dwg