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1. 发明申请

US20110115401A1 METHOD AND APPARATUS FOR CONTROLLING BRIGHTNESS OF LIGHT EMITTING DIODES 有权
标题翻译：用于控制发光二极管亮度的方法和装置
公开(公告)号：US20110115401A1
公开(公告)日：2011-05-19
申请号：US12949684
申请日：2010-11-18
申请人： Chung Ping Kevin LO , Kwok Hung Poon , Wa-Hing Leung , Kam Wah Siu
发明人： Chung Ping Kevin LO , Kwok Hung Poon , Wa-Hing Leung , Kam Wah Siu
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。

2. 发明申请

US20130043799A1 LIGHT ENGINE WITH LED SWITCHING ARRAY 有权
标题翻译：具有LED开关阵列的轻型发动机
公开(公告)号：US20130043799A1
公开(公告)日：2013-02-21
申请号：US13585463
申请日：2012-08-14
申请人： Kam Wah Siu , Wa Hing Leung
发明人： Kam Wah Siu , Wa Hing Leung
IPC分类号： H05B37/00
CPC分类号： H05B33/0824 , H01L2224/48137 , H01L2224/48472 , H01L2224/73265 , H01L2924/13091 , H01L2924/30107 , H05B33/0803 , H01L2924/00
摘要： An LED array switching apparatus comprises, on a single PCB substrate: a plurality of LED arrays D1 to Dn connected in series, each LED array having a forward voltage; an AC voltage supply coupled to the plurality of LED arrays; and a plurality of constant current sources G1 to Gn, coupled to outputs of LED arrays D1 to Dn, respectively, each of the constant current sources being switchable between a current regulating state and an open state such that as the voltage of the AC voltage supply increases, LED arrays are switched on and lit to form a higher forward voltage LED string, and as the voltage of the AC voltage supply decreases, LED arrays are switched off and removed from the LED string starting with the most recently lit LED array.
摘要翻译： LED阵列开关装置包括：在单个PCB基板上：串联连接的多个LED阵列D1至Dn，每个LED阵列具有正向电压; 耦合到所述多个LED阵列的AC电压源; 以及分别耦合到LED阵列D1至Dn的输出的多个恒流源G1至Gn，每个恒定电流源可在电流调节状态和断开状态之间切换，使得当AC电压电源 LED阵列被接通并点亮以形成更高的正向电压LED串，并且随着交流电压电源的电压降低，LED阵列从最近点亮的LED阵列开始关闭并从LED串去除。

3. 发明授权

US09357604B2 Light engine with LED switching array 有权
标题翻译：带LED开关阵列的轻型发动机
公开(公告)号：US09357604B2
公开(公告)日：2016-05-31
申请号：US13585463
申请日：2012-08-14
申请人： Kam Wah Siu , Wa Hing Leung
发明人： Kam Wah Siu , Wa Hing Leung
IPC分类号： H05B37/02 , H05B33/08
CPC分类号： H05B33/0824 , H01L2224/48137 , H01L2224/48472 , H01L2224/73265 , H01L2924/13091 , H01L2924/30107 , H05B33/0803 , H01L2924/00
摘要： An LED array switching apparatus comprises, on a single PCB substrate: a plurality of LED arrays D1 to Dn connected in series, each LED array having a forward voltage; an AC voltage supply coupled to the plurality of LED arrays; and a plurality of constant current sources G1 to Gn, coupled to outputs of LED arrays D1 to Dn, respectively, each of the constant current sources being switchable between a current regulating state and an open state such that as the voltage of the AC voltage supply increases, LED arrays are switched on and lit to form a higher forward voltage LED string, and as the voltage of the AC voltage supply decreases, LED arrays are switched off and removed from the LED string starting with the most recently lit LED array.
摘要翻译： LED阵列开关装置包括：在单个PCB基板上：串联连接的多个LED阵列D1至Dn，每个LED阵列具有正向电压; 耦合到所述多个LED阵列的AC电压源; 以及分别耦合到LED阵列D1至Dn的输出的多个恒流源G1至Gn，每个恒定电流源可在电流调节状态和断开状态之间切换，使得当AC电压电源 LED阵列被接通并点亮以形成更高的正向电压LED串，并且随着交流电压电源的电压降低，LED阵列从最近点亮的LED阵列开始关闭并从LED串去除。

4. 发明授权

US08723439B2 Triac dimmable power supply unit for LED 有权
标题翻译：用于LED的三端双向可控硅调光电源单元
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
IPC分类号： H05B41/16 , H05B41/24 , H05B37/00 , H05B37/02 , H05B41/28 , H05B41/36
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。

5. 发明授权

US09277614B2 Light engine with LED switching array 有权
公开(公告)号：US09277614B2
公开(公告)日：2016-03-01
申请号：US13585463
申请日：2012-08-14
申请人： Kam Wah Siu , Wa Hing Leung
发明人： Kam Wah Siu , Wa Hing Leung
IPC分类号： H05B37/02 , H05B33/08
摘要： An LED array switching apparatus comprises, on a single PCB substrate: a plurality of LED arrays D1 to Dn connected in series, each LED array having a forward voltage; an AC voltage supply coupled to the plurality of LED arrays; and a plurality of constant current sources G1 to Gn, coupled to outputs of LED arrays D1 to Dn, respectively, each of the constant current sources being switchable between a current regulating state and an open state such that as the voltage of the AC voltage supply increases, LED arrays are switched on and lit to form a higher forward voltage LED string, and as the voltage of the AC voltage supply decreases, LED arrays are switched off and removed from the LED string starting with the most recently lit LED array.

6. 发明授权

US08928241B2 Method and apparatus for controlling brightness of light emitting diodes 有权
标题翻译：用于控制发光二极管亮度的方法和装置
公开(公告)号：US08928241B2
公开(公告)日：2015-01-06
申请号：US12949684
申请日：2010-11-18
申请人： Chung Ping Kevin Lo , Kwok Hung Poon , Wa-Hing Leung , Kam Wah Siu
发明人： Chung Ping Kevin Lo , Kwok Hung Poon , Wa-Hing Leung , Kam Wah Siu
IPC分类号： H05B37/02 , H05B33/08
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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