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    • 3. 发明公开
    • 발광다이오드 구동 회로
    • 发光二极管驱动电路
    • KR1020130135031A
    • 2013-12-10
    • KR1020130005244
    • 2013-01-17
    • 매크로블록 인코포레이티드
    • 리얀춘청친충
    • H05B37/02
    • H05B37/02H05B33/0815H05B33/0848Y02B20/341Y02B20/42H05B33/083
    • The light emitting diode (LED) driving circuit includes a power factor collection (PFC) circuit and a driving control device. The PFC circuit controls the power factor of an LED driving circuit. The LED driving circuit includes an inductor, a switch, a current detection circuit, and a time detection circuit. The inductor detects an inductor current and supplies energy to at least one LED. The switch connected to the inductor is operated according to a driving signal. The current detection circuit connected to the switch detects inductor current information. The time detection circuit connected to the switch detects energy discharge time while the inductor current decreases from a peak value to a zero value. The driving control device connected to the switch, the current detection circuit, and the time detection circuit outputs a driving signal to the switch according to the energy discharge time and a voltage level. [Reference numerals] (112) EMI filter circuit;(113) Rectifying circuit;(130) Driving control device
    • 发光二极管(LED)驱动电路包括功率因数采集(PFC)电路和驱动控制装置。 PFC电路控制LED驱动电路的功率因数。 LED驱动电路包括电感器,开关,电流检测电路和时间检测电路。 电感器检测电感电流并向至少一个LED提供能量。 连接到电感的开关根据驱动信号进行工作。 连接到开关的电流检测电路检测电感电流信息。 连接到开关的时间检测电路在电感器电流从峰值减小到零值时检测能量放电时间。 连接到开关的驱动控制装置,电流检测电路和时间检测电路根据能量放电时间和电压电平向开关输出驱动信号。 (112)EMI滤波电路;(113)整流电路;(130)驱动控制装置
    • 5. 发明公开
    • AC-DC 양용 LED 구동회로
    • AC-DC双用LED驱动电路
    • KR1020120136277A
    • 2012-12-18
    • KR1020120005648
    • 2012-01-18
    • 매크로블록 인코포레이티드
    • 리얀춘리우싱푸창주이치예포야오
    • H05B37/02
    • H05B33/0809H05B33/0815H05B33/0818H02M3/1582
    • PURPOSE: A LED driving circuit is provided to operate LED by outputting a PWM signal according to a driving signal turning on-off a switching transistor gradually. CONSTITUTION: An input power circuit(10) outputs a current signal. A buck-boost converter(108) receives the current signal. A pulse width modulation signal controller outputs the PWM signal according to the driving signal. An AC-DC dual-use LED driving circuit(100) drives LED by the driving signal. The buck-boost converter comprises a switching transistor and a feedback resistor. [Reference numerals] (10) Input power circuit; (108) Buck-boost converter; (110) PWM signal controller; (30) Switching transistor; (32) Feedback resistor
    • 目的:提供LED驱动电路,通过根据驱动信号逐渐关闭开关晶体管输出PWM信号来操作LED。 构成:输入电源电路(10)输出电流信号。 降压 - 升压转换器(108)接收电流信号。 脉冲宽度调制信号控制器根据驱动信号输出PWM信号。 AC-DC双用LED驱动电路(100)通过驱动信号驱动LED。 降压 - 升压转换器包括开关晶体管和反馈电阻器。 (附图标记)(10)输入电源电路; (108)降压 - 升压转换器; (110)PWM信号控制器; (30)开关晶体管; (32)反馈电阻