DIMMING CONTROL SYSTEM OF LED ILLUMINATION

PURPOSE: An LED dimming control system for controlling a plurality of LED modules using a dimming control device and a switching mode power supply is provided to improve the efficiency of an LED module driving control and compensate for electric attenuation due to the length difference of a power line by installing a control board. CONSTITUTION: A switching mode power supply(200) is connected in parallel to a plurality of LED modules(100). The LED module includes an LED optical source(110) and a control board(120). The LED optical source includes a plurality of LED arrays including a plurality of LED devices. A control board is connected to the LED optical source. A dimming control unit(300) is connected in parallel to the switching mode power supply and the plurality of the LED modules. [Reference numerals] (110) LED optical source; (120) Control board; (200) Switching mode power supply(SMPS); (300) Dimming control unit