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    • 1. 发明申请
    • LED LIGHT SOURCE
    • LED光源
    • WO2013027171A1
    • 2013-02-28
    • PCT/IB2012/054217
    • 2012-08-21
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.KAHLMAN, Henricus Marius Joseph MariaKURT, RalphTAO, Haimin
    • KAHLMAN, Henricus Marius Joseph MariaKURT, RalphTAO, Haimin
    • H05B33/08
    • H05B33/0815H05B33/083
    • A LED light source comprises a first rectifier (DB1) having input terminals coupled to an AC voltage source and output terminals connected by a first series arrangement comprising N LED loads and further comprises circuitry(I1, I2, I3, CC) for making the LED loads one by one carry a current when the momentary value of the AC voltage increases and one by one stop carrying a current when the momentary value of the AC voltage decreases. The LED light source also comprises a second rectifier (DB2) having input terminals coupled to the AC voltage source via a reactive element and output terminals connected by a second series arrangement comprising M LED loads and further comprises circuitry (I4) for making the LED loads one by one carry a current when the momentary value of the AC voltage present at the input terminals of the second rectifier increases and one by one stop carrying a current when the momentary value of the AC voltage decreases.
    • LED光源包括具有耦合到AC电压源的输入端和通过包括N个LED负载的第一串联装置连接的输出端的第一整流器(DB1),并且还包括用于制造LED的电路(I1,I2,I3,CC) 当交流电压的瞬时值增加时,逐个负载一个负载一个电流,并且当交流电压的瞬时值减小时,一个接一个地停止传递电流。 LED光源还包括具有经由电抗元件耦合到AC电压源的输入端子的第二整流器(DB2),以及由包括M LED负载的第二串联装置连接的输出端子,还包括用于使LED负载 当交流电压的瞬时值减小时,当存在于第二整流器的输入端的交流电压的瞬时值增加并且一个接一个地停止传输电流时,一个接一个地携带电流。
    • 3. 发明申请
    • LED LIGHT SOURCE
    • WO2012168844A3
    • 2012-12-13
    • PCT/IB2012/052790
    • 2012-06-04
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.KAHLMAN, Henricus Marius Joseph MariaKURT, Ralph
    • KAHLMAN, Henricus Marius Joseph MariaKURT, Ralph
    • H05B33/08
    • A LED light source comprises -a full bridge rectifier equipped with a first input terminal and a second input terminal for coupling to output terminals of the phase cut dimmer, -a series arrangement comprising N LED loads, a first and second end of said series arrangement being coupled to a first output terminal and a second output terminal of the full bridge rectifier respectively, -control means for during a period of the rectified AC supply voltage subsequently making the LED loads comprised in the first series arrangement carry a current, one by one and in dependency of the momentary amplitude of the rectified AC supply voltage when the momentary amplitude increases and for subsequently making the LED loads stop carrying a current, one by one, and in dependency of the momentary amplitude of the rectified AC supply voltage when the momentary amplitude decreases, said control means controlling the current through the LED loads at zero when the output voltage of the phase cut dimmer equals zero and controlling the current through the LED loads at a value that is independent from the phase angle of the phase cut dimmer when the output voltage of the phase cut dimmer differs from zero Volt. In order to make the LED light source compatible with a phase cut dimmer, the LED light source is further equipped with -a switchable bleeder current source coupled between the first and second output terminal of the full bridge rectifier, -a latch coupled between the first and second output terminals of the full rectifier bridge and comprising a series arrangement of a resistor and a capacitor to prevent the current through the dimmer from crossing zero after a leading edge generated by the phase cut dimmer, in case the phase cut dimmer is a leading edge phase cut dimmer, -a unidirectional element arranged in series with the capacitor for preventing discharging of the capacitor via the LED loads or the adjustable bleeder current source, and -a clamp circuit coupled to the capacitor and comprising a current source for discharging the capacitor and providing a low ohmic path for the dimmer current when the dimmer is off.
    • 5. 发明申请
    • LED LIGHT SOURCE
    • LED光源
    • WO2012168828A2
    • 2012-12-13
    • PCT/IB2012/052690
    • 2012-05-30
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.TAO, HaiminKAHLMANN, Henricus Marius Joseph MariaKURT, Ralph
    • TAO, HaiminKAHLMANN, Henricus Marius Joseph MariaKURT, Ralph
    • H05B33/08
    • H05B33/0845H05B33/0812H05B33/0815H05B33/083H05B33/0842H05B33/0851H05B37/02Y02B20/347Y02B20/348
    • The invention relates to a LED light source,suitable for use with a phase cut dimmer such as a TRIAC dimmer (III), comprising - a first input terminal (K1) and a second input terminal (K2)for connection to a supply voltage source supplying a low frequency AC supply voltage with frequency f, -a rectifier (I) coupled to the input terminals for rectifying the low frequency AC supply voltage, - a series arrangement comprising N LED loads (LL1, LL2, LL3), a first and second end of said series arrangement being coupled to a first output terminal and a second output terminal of the rectifier, - control circuitry (IX) for subsequently making the LED loads conduct a current, one by one, in dependency of the instantaneous value of the low frequency AC supply voltage when the instantaneous value increases and for subsequently making the LED loads stop conducting a current, one by one, in dependency of the instantaneous value of the low frequency AC supply voltage when the instantaneous value decreases, wherein the control circuitry comprises - N control strings comprising a controllable current regulator and coupled between the cathode of a LED load and the second output terminal of the rectifier, and - a global current control circuit (X) coupled to the controllable current regulators for controlling the instantaneous value of the current through the control strings, wherein the controllable current regulators each comprise a series arrangement of a transistor and at least one impedance,and wherein the global current control circuit is coupled to the control electrodes of the transistors comprised in the controllable current regulators and comprises circuitry for adjusting the voltage present at the control electrodes of the transistors comprised in the control strings, in dependency of the adjusted phase angle of the phase cut dimmer, and - a series arrangement of a switch (S) and a capacitor (C1)coupled between the output terminals of the rectifier and control circuitry (VIII) for rendering the switch conductive in case the instantaneous value of the low frequency AC supply voltage drops below a reference value.
    • 本发明涉及一种适用于诸如TRIAC调光器(III)的相位调光器的LED光源,包括:用于连接到电源电压源的第一输入端子(K1)和第二输入端子(K2) 提供具有频率f的低频AC电源电压, - 耦合到输入端的整流器(I),用于整流低频AC电源电压; - 串联装置,包括N个LED负载(LL1,LL2,LL3),第一和 所述串联装置的第二端耦合到整流器的第一输出端和第二输出端;控制电路(IX),用于随后使LED负载根据所述串联装置的瞬时值一个接一个地导通电流 当瞬时值增加时,低频交流电源电压和随后使LED负载依赖于低频交流电源电压的瞬时值逐个停止传导电流,当瞬时值decr 其中控制电路包括N个控制串,其包括可控电流调节器并且耦合在LED负载的阴极和整流器的第二输出端之间,以及耦合到可控电流调节器的全局电流控制电路(X) 用于控制通过控制串的电流的瞬时值,其中可控电流调节器每个包括晶体管和至少一个阻抗的串联布置,并且其中全局电流控制电路耦合到晶体管的控制电极, 可控电流调节器,并且包括用于根据调相相位切割调光器的相位角调整存在于控制串中包括的晶体管的控制电极处的电压的电路,以及 - 开关(S)和 耦合在整流器的输出端子和控制电路(VI)之间的电容器(C1) II),用于在低频AC电源电压的瞬时值低于参考值的情况下使开关导通。