| 摘要 |
<p>PURPOSE: An LED lighting driver circuit controls current driving characteristics of each current channel by individually installing ground resistors on each current channel of an AC direct type LED driver circuit, randomly setting a voltage value at the individual ground resistor, and controlling a switching element of a previous channel based on a set threshold voltage value of each ground resistor. CONSTITUTION: An LED lighting driver circuit having a current supply control function by LED includes a power unit (110) including a power supply unit which receives external AC power and a rectifier circuit of AC power applied through the power supply unit; an LED lighting unit (120) which includes a first LED located at the shortest distance from a connection point with the power unit to an n-th LED located at the longest distance from the power unit, and in which the first LED is connected to the power unit and the LEDs are connected to each other in series; multiple switching circuit units (130) connected to an output terminal of the LED, forming a current supply channel for the corresponding LED and individually including a ground resistor; and a switching circuit control unit (140) individually connected to the switching circuit unit and turning off the previous switching circuit unit relatively adjacent to the power unit when a voltage value at the ground resistor exceeds a set threshold voltage value.</p> |
