公开(公告)号：US06734639B2

公开(公告)日：2004-05-11

申请号：US09930735

申请日：2001-08-15

Applicant: Chin Chang ,  Bernd Clauberg

Inventor： Chin Chang ,  Bernd Clauberg

IPC: G05F100

CPC classification number: H05B33/0818 ,  H05B33/0845 ,  Y02B20/347

Abstract: An apparatus for controlling overshoots in the switching of LED arrays in a system having a switching voltage converter providing the biasing voltage for the LED array. By synchronizing a switching converter to an LED turn-on signal, loading on the voltage converter can be controlled such that output conduction of the converter only occurs when LEDs that are to be displayed are switched on to provide loading to the output of the converter. A Sample and hold method is employed to effectively store the current information in a previous “on” interval and use it for the current control in a following interval with inhibited current overshoot.

Abstract translation: 一种用于控制在具有为LED阵列提供偏置电压的开关电压转换器的系统中的LED阵列的切换中的过冲的装置。 通过将开关转换器同步到LED导通信号，可以控制电压转换器上的负载，使得转换器的输出导通仅在要显示的LED被接通以在转换器的输出端提供负载时才发生。 采用采样和保持方法来有效地将当前信息存储在先前的“开”时间间隔中，并在随后的间隔中将其用于电流控制，并且具有禁止的电流过冲。

公开(公告)号：US06509696B2

公开(公告)日：2003-01-21

申请号：US09815089

申请日：2001-03-22

Applicant: Gert Bruning ,  Chin Chang

Inventor： Gert Bruning ,  Chin Chang

IPC: H05B4116

CPC classification number: H05B41/282 ,  H01J61/56 ,  H01J61/70 ,  H01J61/78 ,  H01J65/046 ,  Y02B20/183 ,  Y10S315/05

Abstract: A capacitively coupled fluorescent lamp package having a capacitively coupled fluorescent lamp; an inverter circuit for driving the lamp; and supply nodes for receiving a supply voltage is disclosed. The capacitively coupled fluorescent lamp package includes a resonant circuit lamp driving scheme for driving the capacitively coupled fluorescent lamp. The driving scheme reduces parasitic capacitance leakage current; compensates the reactive power using the secondary side leakage inductance in order to have the resonant frequency approximately equal the inverter circuit operating frequency for current source-type driven circuits; and forms a series resonant sub-circuit with the embedded ballasting capacitor and the secondary side leakage inductance for voltage source-type driven circuits, such that the resonant frequency is substantially less than the inverter circuit operating frequency and that the lamp current is properly shaped along with current ballasting.

公开(公告)号：US06496012B1

公开(公告)日：2002-12-17

申请号：US09667450

申请日：2000-09-22

Applicant: Da Feng Weng ,  Chin Chang

Inventor： Da Feng Weng ,  Chin Chang

IPC: G01R3108

CPC classification number: H02H3/382 ,  H02H7/04 ,  H05B41/2851

Abstract: An apparatus and method for detecting a short in a load which receives power from a transformer having a primary winding and a secondary winding with the load being connected to the secondary winding. The apparatus has a waveform conversion circuit, a phase detector circuit and a filter. The waveform conversion circuit converts voltage and current signals that represent the voltage and current, respectively, of the primary winding into generally squarewave voltage and current signals, respectively. The phase detector circuit outputs a control signal having a first state when the generally squarewave voltage and current signals are substantially in phase and a second state when there is a difference in phase between the generally squarewave voltage and current signals that is greater than a predetermined phase difference. The filter filters the control signal outputted to the phase detector circuit.

Abstract translation: 一种用于检测负载中的短路的装置和方法，该负载从具有初级绕组和次级绕组的变压器接收负载，该负载连接到次级绕组。 该装置具有波形转换电路，相位检测电路和滤波器。 波形转换电路分别将表示初级绕组的电压和电流的电压和电流信号转换成大致方波电压和电流信号。 当大致方波电压和电流信号基本上同相时，相位检测器电路输出具有第一状态的控制信号，当在大致方波电压和大于预定相位的电流信号之间存在相位差时，第二状态 区别。 滤波器对输出到相位检测器电路的控制信号进行滤波。

公开(公告)号：US06429604B2

公开(公告)日：2002-08-06

申请号：US09489753

申请日：2000-01-21

Applicant: Chin Chang

Inventor： Chin Chang

IPC: H05B3700

CPC classification number: H05B41/2827 ,  H05B41/28 ,  Y10S315/07

Abstract: A ballast circuit for a single or multiple lamp parallel operation where at each lamp a condition may be controlled such that the amplitude of a resonant inductor current and an output voltage are almost constant in the steady state. The circuit consists of a half-bridge of a DC storage capacitor, a DC blocking capacitor, power transistors which alternately switch on and off and have a 50% duty ratio, and an LLC resonant converter having a resonant inductor and one or more resonant capacitors. The circuit also includes an output transformer providing galvanic isolation for a double path type power feedback scheme. The output transformer produces magnetizing inductance utilized for power feedback circuit optimization and is connected right after the resonant inductor of the half-bridge circuit.

Abstract translation: 一种用于单灯或多灯并联操作的镇流器电路，其中在每个灯处可以控制条件，使得谐振电感器电流的幅度和输出电压在稳定状态下几乎恒定。 该电路包括直流存储电容器的半桥，隔直流电容器，交替接通和断开并具有50％占空比的功率晶体管，以及具有谐振电感器和一个或多个谐振电容器的LLC谐振变换器 。 该电路还包括一个输出变压器，为双路径功率反馈方案提供电流隔离。 输出变压器产生用于功率反馈电路优化的励磁电感，并连接在半桥电路的谐振电感器之后。

公开(公告)号：US06373725B1

公开(公告)日：2002-04-16

申请号：US09716698

申请日：2000-11-20

Applicant: Chin Chang ,  Adan Hernandez ,  Gert Bruning

Inventor： Chin Chang ,  Adan Hernandez ,  Gert Bruning

IPC: H02M3335

CPC classification number: H02M1/4208 ,  H02M1/10 ,  H02M2003/1557 ,  Y02B70/126

Abstract: A switchable power converter includes an input section that receives an AC input voltage and rectifies the AC input voltage and a switchable converter section operative to receive the rectified AC input voltage and convert the rectified AC input voltage to an intermediate DC output voltage. The switchable converter section includes at least one configuration switch operative to switch the switchable converter section between a boost converter topology, for low input line voltages, and either a flyback or SEPIC converter circuit topology, for high input line voltages.

Abstract translation: 可切换电力转换器包括接收AC输入电压并整流AC输入电压的输入部分和可操作以接收经整流的AC输入电压并将整流的AC输入电压转换为中间DC输出电压的可切换转换器部分。 可切换转换器部分包括至少一个配置开关，用于对于高输入线路电压，在用于低输入线路电压的升压转换器拓扑以及反激式或SEPIC转换器电路拓扑之间切换可切换转换器部分。

公开(公告)号：US06326740B1

公开(公告)日：2001-12-04

申请号：US09218556

申请日：1998-12-22

Applicant: Chin Chang ,  Gert W. Bruning

Inventor： Chin Chang ,  Gert W. Bruning

IPC: G05F100

CPC classification number: H02M7/53803 ,  H05B41/2828 ,  H05B41/2986 ,  H05B41/3925 ,  Y02B70/1441 ,  Y10S315/07

Abstract: An electronic ballast with a voltage-fed, LC or LLC resonant inverter for multiple gas discharge lamp independent operation which maintains a substantially constant voltage to a lamp or lamps connected to the ballast even during a transition period when a lamp or lamps is ignited, extinguished, added or removed. The ballast includes a feedback loop that maintains a substantially constant phase angle between the voltage and the current in an LC or LLC tank circuit, which has the effect of the ballast providing the substantially constant voltage output. The feedback loop obtains a current feedback signal and a voltage feedback signal from the tank circuit, and provides a phase shifted signal as a feedback correction signal which is the current feedback signal phase shifted by the voltage feedback signal that tracks phase angle changes with one, some or all of the lamps of a set thereof connected to the ballast, and during the transition period. The feedback loop includes a phase-shift circuit which includes at least one differential amplifier stage that receives the current feedback signal at both inputs and the voltage feedback signal at one input so as to phase shift the current feedback signal at that one input. The ballast operates instant start or rapid start gas discharge lamps in various configurations, including dimming configurations.

Abstract translation: 具有电压馈入，LC或LLC谐振逆变器的电子镇流器，用于多个气体放电灯独立操作，即使在灯或灯被点燃，熄灭时的过渡期间，也保持连接到镇流器的灯或灯的基本上恒定的电压 ，添加或删除。 镇流器包括反馈回路，其在LC或LLC储能电路中的电压和电流之间保持基本上恒定的相位角，其具有提供基本上恒定的电压输出的镇流器的作用。 反馈环路获得来自振荡电路的电流反馈信号和电压反馈信号，并且提供相移信号作为反馈校正信号，该反馈校正信号是电流反馈信号相位，该电流反馈信号由跟踪相位角变化的电压反馈信号移位， 其一组中的一些或全部灯连接到镇流器，并且在过渡期间。 反馈回路包括相移电路，其包括至少一个差分放大器级，其在两个输入端接收电流反馈信号，并在一个输入端接收电压反馈信号，以便在该一个输入端移相电流反馈信号。 镇流器以各种配置操作即时启动或快速启动气体放电灯，包括调光配置。

公开(公告)号：US06288497B1

公开(公告)日：2001-09-11

申请号：US09534210

申请日：2000-03-24

Applicant: Chin Chang ,  Shaomin Peng

Inventor： Chin Chang ,  Shaomin Peng

IPC: B60Q102

CPC classification number: H05B33/0821 ,  H05B33/0803 ,  Y10S362/80

Abstract: A matrix structure-based light-emitting diode array includes a plurality of input resistances connected in parallel to one terminal of a current source, and a plurality of output resistances connected in parallel to another terminal of a current source. Light-emitting diodes are then used to connect each of the input resistances to each of the output resistances. Arranged as such, no two light-emitting diodes is connected in parallel and, as such, the failure of any one light-emitting diode does not extinguish any of the other light-emitting diodes.

Abstract translation: 基于矩阵结构的发光二极管阵列包括与电流源的一个端子并联连接的多个输入电阻和与电流源的另一个端子并联连接的多个输出电阻。 然后使用发光二极管将每个输入电阻连接到每个输出电阻。 这样排列，没有并联连接两个发光二极管，因此任何一个发光二极管的故障都不会熄灭任何其它的发光二极管。

公开(公告)号：US06249088B1

公开(公告)日：2001-06-19

申请号：US09431583

申请日：1999-11-01

Applicant: Chin Chang

Inventor： Chin Chang

IPC: H05B3700

CPC classification number: H05B33/0821 ,  H05B33/089 ,  Y10S362/80

Abstract: A lighting system comprising a plurality of light-emitting diodes and a power supply source for driving current through a plurality of parallel disposed, electrically conductive branches, wherein the branches comprise at least one cell. The branches are configured to display the light-emitting diodes according to a three-dimensional arrangement. In each cell, each branch has a light-emitting diode with an anode terminal and a cathode terminal. The anode terminal of each light-emitting diode is coupled to the cathode terminal of a light-emitting diode of an adjacent branch via a shunt. The shunt further comprises a light-emitting diode. In each cell, each light-emitting diode may have a different forward voltage characteristic, while still insuring that all of the light-emitting diodes in the arrangement have the same brightness. Upon failure of one light-emitting diode in a cell, the remaining light-emitting diodes in the same cell are not extinguished and, in a multiple cell embodiment, the light-emitting diodes in the successive cells are not extinguished.

Abstract translation: 一种照明系统，包括多个发光二极管和用于驱动电流通过多个平行布置的导电分支的电源，其中所述分支包括至少一个单元。 分支被配置为根据三维布置显示发光二极管。 在每个单元中，每个分支具有带有阳极端子和阴极端子的发光二极管。 每个发光二极管的阳极端子经由分流器耦合到相邻支路的发光二极管的阴极端子。 分路还包括发光二极管。 在每个单元中，每个发光二极管可具有不同的正向电压特性，同时仍然确保该布置中的所有发光二极管具有相同的亮度。 在单元中的一个发光二极管故障时，同一单元中剩余的发光二极管不熄灭，并且在多单元实施例中，连续单元中的发光二极管不熄灭。

公开(公告)号：US06169374A

公开(公告)日：2001-01-02

申请号：US09455128

申请日：1999-12-06

Applicant: Chin Chang

Inventor： Chin Chang

IPC: H05B3702

CPC classification number: H02M1/425 ,  H05B41/28 ,  Y02B70/126

Abstract: A power converter for providing high frequency current to a load such as a fluorescent lamp. A rectifier circuit provides DC power to a half-bridge inverter whose output is connected to one end of a resonant load circuit. One load connection is at the other end of the load circuit, and is connected to one AC-side terminal of the rectifier circuit to provide current feedback. A voltage feedback capacitor is connected between the other AC-side rectifier circuit terminal and the other load connection. The two feedback paths contribute equivalent components to charging current for a bulk capacitor for the DC power to the inverter. Excellent fluorescent lamp ballast performance is obtained with constant inverter frequency, and with either full bridge or voltage doubler embodiments.

Abstract translation: 用于向诸如荧光灯等负载提供高频电流的电力转换器。 整流电路向输出连接到谐振负载电路的一端的半桥逆变器提供直流电力。 一个负载连接在负载电路的另一端，并连接到整流电路的一个AC侧端子以提供电流反馈。 另一个AC侧整流电路端子与另一个负载连接端连接有电压反馈电容器。 两个反馈路径为逆变器的直流电源提供了大容量电容器的充电电流的等效元件。 获得具有恒定的逆变器频率以及全桥或倍压器实施例的优异的荧光灯镇流器性能。

公开(公告)号：US6072710A

公开(公告)日：2000-06-06

申请号：US221953

申请日：1998-12-28

Applicant: Chin Chang

Inventor： Chin Chang

IPC: H05B41/24 ,  H05B41/282 ,  H05B41/392 ,  H02M7/5387 ,  H05B37/02

CPC classification number: H05B41/3925 ,  H05B41/2827 ,  Y02B20/185

Abstract: Lamp voltage or current obtained from a self-oscillating converter is stabilized by a feedback circuit. Gates of the switching transistors are connected to output windings of a current transformer whose input current winding is in series with the resonant load lamp circuit. The lamp voltage or current is sensed, and the resulting signal is used to control current through an auxiliary control winding on the current transformer. Preferably, two opposite conductivity type control transistors are connected in parallel across the control winding, and low-pass filtered DC signals corresponding to the lamp voltage or current bias the control transistors.

Abstract translation: 由自振荡转换器获得的灯电压或电流由反馈电路稳定。 开关晶体管的栅极连接到其输入电流绕组与谐振负载灯电路串联的电流互感器的输出绕组。 检测灯电压或电流，得到的信号用于控制电流互感器上的辅助控制绕组的电流。 优选地，两个相反的导电型控制晶体管并联连接在控制绕组上，并且对应于灯电压或电流偏置控制晶体管的低通滤波DC信号。