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    • 2. 发明申请
    • LED LIGHT SOURCE
    • LED光源
    • WO2013114260A1
    • 2013-08-08
    • PCT/IB2013/050668
    • 2013-01-25
    • KONINKLIJKE PHILIPS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH
    • MALYNA, Dmytro ViktorovychDE BRUYCKER, Patrick Alouisius MartinaRADERMACHER, Harald Josef Günther
    • H05B33/08
    • H05B33/0851H05B33/0815H05B39/09
    • Dimmable LED light source comprising: - a rectifier having rectifier input terminals for connection to respective output terminals of a phase cut dimmer of the trailing edge type, input terminals of the phase cut dimmer being connected to the mains supply, and having a first rectifier output terminal and a second rectifier output terminal, - a bleeder circuit connecting the rectifier output terminals, - a series arrangement comprising a first unidirectional element and first capacitive means connecting the rectifier output terminals, - a converter circuit, having input terminals coupled to respective sides of the first capacitive means and output terminals coupled to a LED load, for generating a current through the LED load, in dependence on a dim signal, out of a voltage present across the capacitive means, - a dim circuit for generating a dim signal as a function of the adjusted phase angle of the phase cut dimmer and for supplying the dim signal to a dim input of the converter circuit, - a series arrangement comprising a switching element and second capacitive means coupled between a terminal between the first unidirectional element and the second output terminal of the rectifier, - a control circuit for controlling the switching element in the conductive state when the voltage between the first and second output terminals of the rectifier drops below a first predetermined reference and for controlling the switching element in the non-conductive state when the voltage across the second capacitive means has reached a second predetermined reference, wherein the first capacitive means is dimensioned so that the voltage between the first and the second output terminal of the rectifier equals the sum of the voltage across the first capacitive means and the voltage across the first unidirectional means if the switching element is non-conductive.
    • 可调光LED光源包括:整流器,其具有用于连接到后缘型相位切割调光器的相应输出端的整流器输入端,所述相位调光器的输入端连接到所述电源,并且具有第一整流器输出 端子和第二整流器输出端子, - 连接整流器输出端子的放电电路, - 包括连接整流器输出端子的第一单向元件和第一电容性装置的串联装置, - 转换器电路,其具有耦合到 耦合到LED负载的第一电容装置和输出端,用于根据电容装置上存在的电压,根据暗信号产生通过LED负载的电流; - 用于产生暗信号的调光电路, 相位调光器的调整相位角的功能,并用于将暗信号提供给转换器的暗淡输入 它包括一个串联装置,它包括耦合在整流器的第一单向元件和第二输出端子之间的端子之间的开关元件和第二电容性装置, - 一个控制电路,用于当开关元件的电压 整流器的第一和第二输出端子下降到低于第一预定参考值,并且当跨越第二电容性装置的电压达到第二预定基准时,用于控制开关元件处于非导通状态,其中第一电容性装置的尺寸使得 如果开关元件不导通,则整流器的第一和第二输出端之间的电压等于第一电容装置两端的电压和跨第一单向装置的电压之和。
    • 3. 发明申请
    • LED LIGHT SOURCE
    • LED光源
    • WO2013114234A1
    • 2013-08-08
    • PCT/IB2013/050358
    • 2013-01-15
    • KONINKLIJKE PHILIPS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH
    • MALYNA, Dmytro ViktorovychDE BRUYCKER, Patrick Alouisius MartinaRADERMACHER, Harald Josef Günther
    • H05B33/08
    • H05B33/0848H05B33/0809H05B33/0815
    • The invention relates to a dimmable LED light source comprising: - a rectifier having rectifier input terminals for connection to respective output terminals of a phase cut dimmer of the trailing edge type, input terminals of the phase cut dimmer being connected to the mains supply, and having rectifier output terminals, - a first bleeder circuit connecting the rectifier output terminals, - a series arrangement comprising a unidirectional element and a capacitive means connecting the rectifier output terminals, - a converter circuit, having input terminals coupled to respective sides of the capacitive means and output terminals coupled to a LED load, for generating a current through the LED load, in dependence on a dim signal, out of a voltage present across the capacitive means, - a dim circuit for generating a dim signal as a function of the adjusted phase angle of the phase cut dimmer and for supplying the dim signal to a dim input of the converter circuit, the dim circuit comprising: - gradient detection circuitry for determining the gradient of the voltage across the capacitive means and for determining as the adjusted phase angle the first value of the phase angle for which the gradient is negative, when the phase angle is less than 90 degrees, - signal generating circuitry for generating a sinusoidal signal that represents the mains supply voltage, - circuitry for activating the first bleeder when the phase angle is 90 degrees and for switching off the first bleeder when the adjusted phase angle has been determined, in case the adjusted phase angle is higher than 90 degrees, - deviation detection circuitry for detecting the deviation of the voltage across the rectifier output terminals from the sinusoidal signal, for comparing the deviation voltage with a reference voltage and for determining as the adjusted phase angle the value of the phase angle for which the deviation voltage is higher than or equal to the reference voltage, when the phase angle is between 90 and 180 degrees.
    • 本发明涉及一种可调光LED光源,包括:整流器,其具有用于连接到后缘型相位切割调光器的相应输出端的整流器输入端,所述相切式调光器的输入端连接到电源,以及 具有整流器输出端子, - 连接整流器输出端子的第一放电电路, - 包括单向元件和连接整流器输出端子的电容装置的串联装置, - 转换器电路,其具有耦合到电容装置的相应侧的输入端 以及耦合到LED负载的输出端子,用于根据存在于电容装置两端的电压,根据暗信号产生通过LED负载的电流; - 调光电路,用于产生作为被调整的功能的调光信号 相位切割调光器的相位角,并且用于将暗信号提供给转换器电路的暗淡输入,该暗电路包括 g: - 梯度检测电路,用于确定电容装置两端的电压的梯度,并且当相位角小于90度时,确定梯度为负的相位角的第一值作为调整后的相位角, 信号发生电路,用于产生表示市电电源电压的正弦信号; - 当相位角为90度时用于激活第一泄放器的电路,以及当已调整的相位角已被确定时关闭第一泄放器的电路, 角度高于90度; - 偏差检测电路,用于检测整流器输出端子上的电压与正弦信号的偏差,用于将偏差电压与参考电压进行比较,并将用于确定相位值的相位 当相位角相差时,偏置电压高于或等于参考电压的角度 n 90和180度。