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    • 7. 发明授权
    • 발광다이오드 구동회로
    • 驱动发光二极管的电路
    • KR101289075B1
    • 2013-07-22
    • KR1020120132368
    • 2012-11-21
    • 네오마루 주식회사김재경김근하
    • 김재경김근하김형태윤진식정용식김대중허봉현임수근
    • H05B37/02
    • H05B33/08H05B33/0884Y02B20/341
    • PURPOSE: An LED driving circuit is provided to effectively suppress flicker effects by adding a flicker prevention circuit having a simple configuration. CONSTITUTION: A noise filter (110) filters the noise of an applied external power source. An inrush current prevention circuit (120) controls the maximum current flowing at the moment when the external power source is applied. An input rectification smoothing circuit (130) converts and outputs an input alternating current (AC) power source into a direct current (DC) power source. A DC-DC converter (140) converts and outputs the voltage of a signal outputted from the input rectification smoothing circuit. An output rectifier circuit (150) smoothes and outputs a signal outputted from the DC-DC converter. A flicker prevention circuit (160) reduces the ripple current of a signal outputted from the output rectifier circuit and outputs the reduced ripple current to a light emitting diode (LED). The output rectifier circuit comprises a resistor, a capacitor, and a diode. The flicker prevention circuit comprises a capacitor, a first resistor, a second resistor, and a transistor. [Reference numerals] (110) Noise filter; (120) Inrush current prevention circuit; (130) Input rectification smoothing circuit; (140) DC-DC converter; (150) Output rectifier circuit; (160) Flicker prevention circuit; (AA) External power
    • 目的:提供一种LED驱动电路,通过添加具有简单配置的闪烁防止电路来有效地抑制闪烁效应。 构成:噪声滤波器(110)对所施加的外部电源的噪声进行滤波。 浪涌电流防止电路(120)控制在施加外部电源时流动的最大电流。 输入整流平滑电路(130)将输入交流(AC)电源转换并输出到直流(DC)电源。 DC-DC转换器(140)转换并输出从输入整流平滑电路输出的信号的电压。 输出整流电路(150)平滑并输出从DC-DC转换器输出的信号。 闪烁防止电路(160)减小从输出整流电路输出的信号的纹波电流,并将减小的纹波电流输出到发光二极管(LED)。 输出整流电路包括电阻器,电容器和二极管。 防闪烁电路包括电容器,第一电阻器,第二电阻器和晶体管。 (附图标记)(110)噪声滤波器; (120)浪涌电流防止电路; (130)输入整流平滑电路; (140)DC-DC转换器; (150)输出整流电路; (160)闪烁防止电路; (AA)外部电源