LED LIGHTING SYSTEM FOR IMPROVING LINGHTING AMOUNT AND REDUCING LAYOUT AREA

摘要

PURPOSE: An LED lighting device for minimizing a layout area and improving the quantity of light improves a power factor and a peak factor by controlling the number of LED devices according to a rectified voltage. CONSTITUTION: An LED light emitting block (100) is connected to a rectified voltage, includes LED modules, and forms a tab on each cathode terminal of the LED modules. A switching block (200) includes switch units (TSW1-n) releasing a closed circuit according to a voltage level of a switching control signal and generates a feedback resistor by generating a feedback signal. A control block (300) corresponds to the switch unit and has a voltage level to be controlled by a voltage level of the feedback signal through control units (TCN1-n). Each of the switch units includes a switching transistor, a switching resistor, an amplifier, and the feedback resistor. The switching transistor is electrically connected to the feedback signal and responds to a gating signal. The switching resistor includes a closed circuit of the LED module. The amplifier generates the gating signal by amplifying a voltage difference. The feedback resistor is formed between the feedback signals.