LIGHT GENERATING DEVICE Russian patent published in 2016 - IPC H05B33/08 

FIELD: lighting.

SUBSTANCE: invention relates to LED light-generating device and mode of operation of LED light-generating device. Light generating device (1) is provided with at least voltage input (21) adapted for receiving a variable voltage, at least three LED circuits (10), coupled with said voltage input (21), wherein each LED circuit (10) comprises LED unit (14) and controllable current regulator (15) to control the current through said LED circuit (10). Light generating device (1) further comprises controllable switch matrix (30) comprising plurality of switches (25, 26, 27), said switch matrix (30) is configured to operate in at least three different switching modes and controller (50), connected at least with said switch matrix (30), configured to determine said variable operating voltage and to control the switching mode of said switch matrix (30) in dependence of the determined operating voltage. To provide an efficient operation of such device (1) with a variable operating voltage, such as an AC voltage, in a first switching mode, said LED units (10) are connected parallel to each other, in a second switching mode, at least two of said LED units (10) are connected in series and in a third switching mode, said LED units 10 are connected in series with each other.

EFFECT: technical result consists in accurate control of current in each of the LED circuits regardless of switching mode, even if the LED units have different electrical characteristics.

18 cl, 13 dwg