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1.发明申请公开(公告)号：US20110115401A1
公开(公告)日：2011-05-19
申请号：US12949684
申请日：2010-11-18
IPC分类号： H05B37/02
CPC分类号： H05B33/0845 , H05B33/0812 , H05B33/0815 , Y02B20/343
摘要： A circuit for driving a light emitting diode (LED) comprises: an alternating voltage power supply, comprising a triac dimmer having a firing angle and output terminals that provide power to the LED; a zero crossing detector that detects a polarity change of the alternating voltage provided by the alternating voltage power supply and provides a zero crossing output signal indicative of the zero crossing; a timer triggered by the zero crossing output signal that generates a timer output signal during a time period of the timer; and LED power circuitry that reduces current to the light emitting diode based upon timing characteristics of the timer output signal.
摘要翻译： 一种用于驱动发光二极管（LED）的电路包括：交流电压电源，包括具有触发角的三端双向可控硅调光器和向LED提供电力的输出端子; 检测交流电压提供的交流电压的极性变化的过零检测器，并提供表示过零点的零交叉输出信号; 由过零输出信号触发的定时器，其在定时器的时间段期间产生定时器输出信号; 以及基于定时器输出信号的定时特性降低到发光二极管的电流的LED电源电路。
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2.发明授权公开(公告)号：US08928241B2
公开(公告)日：2015-01-06
申请号：US12949684
申请日：2010-11-18
CPC分类号： H05B33/0845 , H05B33/0812 , H05B33/0815 , Y02B20/343
摘要： A circuit for driving a light emitting diode (LED) comprises: an alternating voltage power supply, comprising a triac dimmer having a firing angle and output terminals that provide power to the LED; a zero crossing detector that detects a polarity change of the alternating voltage provided by the alternating voltage power supply and provides a zero crossing output signal indicative of the zero crossing; a timer triggered by the zero crossing output signal that generates a timer output signal during a time period of the timer; and LED power circuitry that reduces current to the light emitting diode based upon timing characteristics of the timer output signal.
摘要翻译： 一种用于驱动发光二极管（LED）的电路包括：交流电压电源，包括具有触发角的三端双向可控硅调光器和向LED提供电力的输出端子; 检测交流电压提供的交流电压的极性变化的过零检测器，并提供表示过零点的零交叉输出信号; 由过零输出信号触发的定时器，其在定时器的时间段期间产生定时器输出信号; 以及基于定时器输出信号的定时特性降低到发光二极管的电流的LED电源电路。
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公开(公告)号：US08723439B2
公开(公告)日：2014-05-13
申请号：US13696679
申请日：2010-12-06
申请人： Wa-Hing Leung , Kam Wah Siu
发明人： Wa-Hing Leung , Kam Wah Siu
CPC分类号： H05B37/00 , H05B33/0815 , H05B37/02 , H05B41/28 , H05B41/36 , Y02B20/347 , Y02B20/348
摘要： A power-factor-corrected power supply adapted to supply power to one or more light emitting diodes (LEDs), comprises: a triac dimmer electrically connected between an alternating current source and a bridge rectifier; a damping circuit electrically connected between the alternating current source and the bridge rectifier; a bleeder circuit configured to conduct current between a supply terminal of the bridge rectifier and ground only when a triac in the triac dimmer is not conducting current; a fast startup circuit configured to conduct current between the supply terminal of the bridge rectifier and a voltage supply terminal of a power-factor-corrected controller when the triac dimmer is initially turned on until a supply voltage capacitor coupled to the voltage supply terminal of the power-factor-corrected controller has charged; a dimming slope control circuit configured to reduce a first voltage sensed at a current sensing terminal of the power-factor-corrected controller, such that a reduced amount of current is supplied to the one or more LEDs at a given firing angle, wherein the first voltage is representative of a current flowing through a primary winding of a flyback transformer; and a dummy load circuit provided in parallel with the one or more LEDs to draw a holding current for the triac only after the triac is turned on.
摘要翻译： 适于向一个或多个发光二极管（LED）供电的功率因数校正电源包括：电连接在交流电源和桥式整流器之间的三端双向可控硅调光器; 电连接在交流电源和桥式整流器之间的阻尼电路; 一个放电电路，被配置为仅在三端双向可控硅调光器中的三端双向可控硅开关不导通电流时，在桥式整流器的电源端和地之间导通电流; 快速启动电路，其配置为当三端双向可控硅开关控制器最初接通时，在桥式整流器的电源端子和功率因数校正控制器的电压端子之间传导电流，直到电源电压耦合到电源电压端子 功率因数校正控制器已充电; 调光斜率控制电路，被配置为减少在功率因数校正的控制器的电流感测端检测到的第一电压，使得在给定触发角度向一个或多个LED提供减少的电流量，其中第一 电压表示流过回扫变压器的初级绕组的电流; 以及与所述一个或多个LED并联设置的虚拟负载电路，以在三端双向可控硅开关之后仅为三端双向可控硅开关提供保持电流。
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公开(公告)号：US20130113375A1
公开(公告)日：2013-05-09
申请号：US13696679
申请日：2010-12-06
申请人： Wa-Hing Leung , Kam wah Siu
发明人： Wa-Hing Leung , Kam wah Siu
IPC分类号： H05B37/02
CPC分类号： H05B37/00 , H05B33/0815 , H05B37/02 , H05B41/28 , H05B41/36 , Y02B20/347 , Y02B20/348
摘要： A power-factor-corrected power supply adapted to supply power to one or more light emitting diodes (LEDs), comprises: a triac dimmer electrically connected between an alternating current source and a bridge rectifier; a damping circuit electrically connected between the alternating current source and the bridge rectifier; a bleeder circuit configured to conduct current between a supply terminal of the bridge rectifier and ground only when a triac in the triac dimmer is not conducting current; a fast startup circuit configured to conduct current between the supply terminal of the bridge rectifier and a voltage supply terminal of a power-factor-corrected controller when the triac dimmer is initially turned on until a supply voltage capacitor coupled to the voltage supply terminal of the power-factor-corrected controller has charged; a dimming slope control circuit configured to reduce a first voltage sensed at a current sensing terminal of the power-factor-corrected controller, such that a reduced amount of current is supplied to the one or more LEDs at a given firing angle, wherein the first voltage is representative of a current flowing through a primary winding of a flyback transformer; and a dummy load circuit provided in parallel with the one or more LEDs to draw a holding current for the triac only after the triac is turned on.
摘要翻译： 适于向一个或多个发光二极管（LED）供电的功率因数校正电源包括：电连接在交流电源和桥式整流器之间的三端双向可控硅调光器; 电连接在交流电源和桥式整流器之间的阻尼电路; 一个放电电路，被配置为仅在三端双向可控硅调光器中的三端双向可控硅开关不导通电流时，在桥式整流器的电源端和地之间导通电流; 快速启动电路，其配置为当三端双向可控硅开关控制器最初接通时，在桥式整流器的电源端子和功率因数校正控制器的电压端子之间传导电流，直到电源电压耦合到电源电压端子 功率因数校正控制器已充电; 调光斜率控制电路，被配置为减少在功率因数校正的控制器的电流感测端检测到的第一电压，使得在给定触发角度向一个或多个LED提供减少的电流量，其中第一 电压表示流过回扫变压器的初级绕组的电流; 以及与所述一个或多个LED并联设置的虚拟负载电路，以在三端双向可控硅开关之后仅为三端双向可控硅开关提供保持电流。
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公开(公告)号：US08766555B2
公开(公告)日：2014-07-01
申请号：US13157747
申请日：2011-06-10
申请人： Qifei Tu , Wa-Hing Leung
发明人： Qifei Tu , Wa-Hing Leung
IPC分类号： H05B33/14 , H05B33/08 , F21V7/00 , F21Y113/00 , F21Y101/02
CPC分类号： H05B33/0818 , F21V7/0008 , F21Y2113/13 , F21Y2115/10 , H05B33/0863 , H05B33/0872 , Y02B20/347
摘要： A lighting apparatus includes: first, second and third groups of solid state light emitters; a first group of lumiphors; at least first, second and third power lines, the first, second and third group of solid state light emitters each being electrically coupled to at least one of the first, second and third power lines. A current controller controls the relative flux ratios of the first, second and third groups, the controller being programmed to, in response to receipt of a command, retrieve a set of data from a look-up table that contains information of the required flux output of each group of LEDs and generate pulse width modulation (PWM) signals to control current supplied to each group to alter the flux output of each group in order to achieve a desired CCT and total flux output.
摘要翻译： 照明装置包括：第一组，第二组和第三组固态发光体; 第一组发光体; 至少第一，第二和第三电力线，所述第一，第二和第三组固态发光体各自电耦合到所述第一，第二和第三电力线中的至少一个。 电流控制器控制第一组，第二组和第三组的相对通量比，控制器被编程为响应于接收到命令，从查找表中检索包含所需磁通输出信息的一组数据 并且产生脉冲宽度调制（PWM）信号以控制提供给每个组的电流，以改变每组的通量输出，以便实现期望的CCT和总通量输出。
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公开(公告)号：US08947014B2
公开(公告)日：2015-02-03
申请号：US13035556
申请日：2011-02-25
申请人： Wa-Hing Leung , Johnny Siu
发明人： Wa-Hing Leung , Johnny Siu
CPC分类号： H05B33/083 , H05B33/0824 , H05B33/0845
摘要： An LED array switching apparatus, comprises: a plurality of LED arrays arranged in a serial path; a voltage supply coupled to the plurality of LED arrays; a plurality of current sources selectively coupled to the LED arrays, each of the current sources being switchable between a current regulating state and an open state; and a controller that outputs at least one control signal. The controller, the at least one switch and current sources cooperate together such that: when the voltage of the voltage source is below the at least one reference voltage, and/or when a predetermined level of current passes through the one or more current sources, at least one switch is closed and one or more associated current sources are controlled so as to break the serial path into one or more parallel paths each including less than all of the LED arrays.
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公开(公告)号：US20120001555A1
公开(公告)日：2012-01-05
申请号：US13157747
申请日：2011-06-10
申请人： Qifei Tu , Wa-Hing Leung
发明人： Qifei Tu , Wa-Hing Leung
CPC分类号： H05B33/0818 , F21V7/0008 , F21Y2113/13 , F21Y2115/10 , H05B33/0863 , H05B33/0872 , Y02B20/347
摘要： A lighting apparatus includes: first, second and third groups of solid state light emitters; a first group of lumiphors; at least first, second and third power lines, the first, second and third group of solid state light emitters each being electrically coupled to at least one of the first, second and third power lines. A current controller controls the relative flux ratios of the first, second and third groups, the controller being programmed to, in response to receipt of a command, retrieve a set of data from a look-up table that contains information of the required flux output of each group of LEDs and generate pulse width modulation (PWM) signals to control current supplied to each group to alter the flux output of each group in order to achieve a desired CCT and total flux output.
摘要翻译： 照明装置包括：第一组，第二组和第三组固态发光体; 第一组发光体; 至少第一，第二和第三电力线，所述第一，第二和第三组固态发光体各自电耦合到所述第一，第二和第三电力线中的至少一个。 电流控制器控制第一组，第二组和第三组的相对通量比，控制器被编程为响应于接收到命令，从查找表中检索包含所需磁通输出信息的一组数据 并且产生脉冲宽度调制（PWM）信号以控制提供给每个组的电流，以改变每组的通量输出，以便实现期望的CCT和总通量输出。
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公开(公告)号：US07009580B2
公开(公告)日：2006-03-07
申请号：US10085129
申请日：2002-03-01
申请人： Wa-Hing Leung
发明人： Wa-Hing Leung
IPC分类号： G09G3/14
CPC分类号： H05B33/083 , H05B33/0824 , H05B33/0842
摘要： A solid-state lighting array driving circuit in which a plurality of solid-state lighting devices such as LEDs are rearranged in a reconfigurable circuit. The circuit may be changed to incorporate the LEDs into a larger or fewer number of parallel circuits each containing less or more LEDs themselves respectively. The reconfiguration may be done as a result of variable input voltages such that the circuit may reconfigure to provide a preferred number of LEDs in each circuit for the sensed voltage in the circuit.
摘要翻译： 一种固态照明阵列驱动电路，其中诸如LED的多个固态照明装置在可重构电路中重新排列。 可以改变电路以将LED并入更多或更少数量的并联电路，每个并联电路分别包含较少或更多个LED本身。 重新配置可以作为可变输入电压的结果来完成，使得电路可以重新配置以在电路中为感测的电压在每个电路中提供优选数量的LED。
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公开(公告)号：US08508140B2
公开(公告)日：2013-08-13
申请号：US12955030
申请日：2010-11-29
申请人： Wa-Hing Leung , Johnny Siu
发明人： Wa-Hing Leung , Johnny Siu
CPC分类号： H05B33/0809 , H05B33/083
摘要： An LED array switching apparatus, comprises: a plurality of LED segments D1 to Dn connected in series, each LED segment having a forward voltage; a voltage supply coupled to the plurality of LED segments; and a plurality of constant current sources G1 to Gn, coupled to outputs of LED segments D1 to Dn, respectively. Each of the constant current sources is switchable between a current regulating state and an open state such that as the voltage of the voltage supply increases, LED segments are switched on and lit to form a higher forward voltage LED string, and as the voltage of the voltage supply decreases, segments are switched off and removed from the LED string starting with the most recently lit segment.
摘要翻译： 一种LED阵列开关装置，包括：串联连接的多个LED段D1至Dn，每个LED段具有正向电压; 耦合到所述多个LED段的电压源; 以及分别耦合到LED段D1至Dn的输出的多个恒流源G1至Gn。 每个恒流源可以在电流调节状态和断开状态之间切换，使得当电压源的电压增加时，LED段被接通并点亮以形成更高的正向电压LED串，并且作为 电压降低，从最近点亮的段开始，将LED段切断并从LED串上拆下。
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公开(公告)号：US20120056608A1
公开(公告)日：2012-03-08
申请号：US12959178
申请日：2010-12-02
申请人： Johnny SIU , Wa-Hing Leung
发明人： Johnny SIU , Wa-Hing Leung
IPC分类号： G05F3/08
CPC分类号： H05B33/0815
摘要： A stabilization circuit is provided at an output of an electronic transformer driving circuit having a rectifier fed into a feedback-controlled oscillator circuit that drives an isolation transformer at an output of the electronic transformer driving circuit. The stabilization circuit includes: a current limiting portion that limits an amount of current delivered by the electronic transformer driving circuit.
摘要翻译： 在电子变压器驱动电路的输出端设有稳压电路，该电子变压器驱动电路具有馈送到电子变压器驱动电路的输出端的驱动隔离变压器的反馈控制振荡电路的整流器。 稳定电路包括：限制由电子变压器驱动电路传送的电流量的限流部分。
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