MULTILOOP CONTROL CIRCUIT, CONTROL METHOD THEREOF, DECORATIVE LAMP AND DECORATIVE LAMP CLUSTER

摘要

A multiloop control circuit, a control method thereof, a decorative lamp and a decorative lamp cluster are provided, wherein the multiloop control circuit comprises a control unit (2) powered by a power input unit (1) and used for outputting a control signal, at least two master lines (19, 20, 21, 22), at least two first control switches (11, 12, 13, 14), and at least two second control switches (7, 8, 9, 10). The first end of each master line (19, 20, 21, 22) is coupled with the power end (15, 16, 17, 18) through the first control switch (11, 12, 13, 14) and grounded (3, 4, 5, 6) through the second control switch (7, 8, 9, 10). Two sets of LEDs with different polarities are connected in parallel between the second ends of two arbitrary master lines (19, 20, 21, 22). The control ends of the first control switch (11, 12, 13, 14) and the second switch (7, 8, 9, 10) are coupled with the output ends of the control unit (2) respectively. The control signal outputted by the control unit (2) is received by the first control switch (11, 12, 13, 14) and the second switch (7, 8, 9, 10) which are in on or off state according to the control signal.