公开(公告)号：US07443209B2

公开(公告)日：2008-10-28

申请号：US10540671

申请日：2003-12-18

Applicant: Chin Chang

Inventor： Chin Chang

IPC: G11C27/02

CPC classification number: H05B33/0818 ,  H05B33/0851

Abstract: Improved stability in a regulator having a sample-and-hold. Coupling an input voltage to an input node of the sample-and-hold circuit is provided. Activating the sample-and hold circuit in response to the input voltage and sensing an output voltage at an output node coupled to the sample and hold circuit is also provided. Determining whether the input voltage at the input node is greater than the output voltage at the output node and providing a sample-and-hold function based on the determination are also provided. A regulation circuit is provided. A sample-and-hold circuit coupled to input and output nodes is also provided. The transfer function of the sample-and-hold circuit is pseudo-all-pass if the input voltage at the input node is greater than an output voltage at the output node and is a substantially constant signal if the input voltage at the input node is less than the output voltage at the output node.

Abstract translation: 改进了具有采样保持的调节器的稳定性。 提供了将输入电压耦合到采样保持电路的输入节点。 还提供响应于输入电压激活采样保持电路并感测耦合到采样和保持电路的输出节点处的输出电压。 确定输入节点处的输入电压是否大于输出节点处的输出电压，并提供基于该确定的采样保持功能。 提供调节电路。 还提供耦合到输入和输出节点的采样和保持电路。 如果输入节点处的输入电压大于输出节点处的输出电压，则采样和保持电路的传递函数是伪全通的，如果输入节点的输入电压为 小于输出节点处的输出电压。

公开(公告)号：US20060114201A1

公开(公告)日：2006-06-01

申请号：US10540670

申请日：2003-12-18

Applicant: Chin Chang

Inventor： Chin Chang

IPC: G09G3/32

CPC classification number: H05B33/0815 ,  H05B33/0818 ,  H05B33/0866 ,  H05B33/0869

Abstract: Color correction in phosphor converted LEDs 520. A system and method provide color correction in emission spectra of a phosphor converted LED under PWM current drive. A modulation for a driving current signal is determined 810. A constant-magnitude current signal is modulated based on the determined modulation 820. The modulated current signal is applied to cause a color correction in the emission spectra 830. Apparatus to provide color correction in the emission spectra of a phosphor converted LED is provided 520. A color correction control circuit and a phosphor converted LED coupled to the control circuit are also provided 600.

Abstract translation: 磷光体转换LED 520中的色彩校正。 一种系统和方法在PWM电流驱动下在磷光体转换LED的发射光谱中提供颜色校正。 确定810的驱动电流信号的调制。 基于所确定的调制820调制恒定幅度电流信号。 施加调制电流信号以在发射光谱830中引起颜色校正。 提供了在磷光体转换的LED的发射光谱中提供颜色校正的装置520。 还提供了颜色校正控制电路和耦合到控制电路的磷光体转换LED 600。

公开(公告)号：US20060076843A1

公开(公告)日：2006-04-13

申请号：US11287095

申请日：2005-11-28

Applicant: Chin Chang

Inventor： Chin Chang

IPC: H02K7/18 ,  H02K1/04 ,  H02K5/12 ,  A45B3/02

CPC classification number: H02K19/16 ,  H02K53/00

Abstract: An isolated electric power generator by utilizing leaking magnetic flux i includes a ferromagnetic core, at least one coil winding the ferromagnetic core, at least one pair of output terminals, and an envelope enclosing the aforementioned parts. In the usage of the present invention, the present invention's power generator does not connect to any other electric power source system. An aquarium with the isolated electric power generator induced by leaking magnetic flux is also disclosed.

Abstract translation: 通过利用泄漏磁通i的隔离发电机包括铁磁芯，至少一个缠绕铁磁芯的线圈，至少一对输出端子和封闭上述部件的封套。 在本发明的使用中，本发明的发电机不连接到任何其他电源系统。 还公开了由泄漏磁通引起的隔离发电机的水族箱。

公开(公告)号：US06498437B1

公开(公告)日：2002-12-24

申请号：US09723536

申请日：2000-11-28

Applicant: Chin Chang ,  Roderick T. Hinman

Inventor： Chin Chang ,  Roderick T. Hinman

IPC: H05B4124

CPC classification number: H05B41/2855 ,  H05B41/2856

Abstract: A lamp ballast for energizing a lamp has short circuit protection. The lamp ballast contains a transformer that provides an output voltage to the lamp. The transformer has a primary winding, a secondary winding, and a third sense winding. The third sense winding has an output that provides an indication of transformer output voltage. A reference voltage circuit creates a reference voltage that provides an indication of a non-short circuited lamp ballast condition. A comparator compares the reference voltage and the output of the third sense winding to provide an indication if the third sense winding output is below the reference. This indicates if there is a short in the output of the lamp ballast. The secondary is wound on multiple sections of a bobbin with one section being a low voltage section. The sense winding is wound under the secondary in the bobbin secondary low voltage section. The ballast additionally has a track and hold circuit to prevent an indication of a short in the lamp voltage when the lamp voltage is dimmed with a dimming circuit. The ballast also has a preheat logic signal to prevent a short circuit indication during the preheat mode at startup.

Abstract translation: 灯泡通电灯泡具有短路保护功能。 灯泡镇流器包含一个为灯提供输出电压的变压器。 变压器具有初级绕组，次级绕组和第三感测绕组。 第三感测绕组具有提供变压器输出电压指示的输出。 参考电压电路产生提供非短路灯镇流器状况的指示的参考电压。 比较器比较参考电压和第三感测绕组的输出，以提供第三感测绕组输出是否低于参考值的指示。 这表示灯泡镇流器的输出是否短路。 次级绕组缠绕在线轴的多个部分上，其中一个部分是低电压部分。 感应绕组在绕线管低压部分的二次绕组下缠绕。 镇流器还具有跟踪和保持电路，以在灯电压用调光电路变暗时防止指示灯电压短路。 镇流器还具有预热逻辑信号，以防止启动期间预热模式下的短路指示。

公开(公告)号：US06495964B1

公开(公告)日：2002-12-17

申请号：US09749154

申请日：2000-12-27

Applicant: Subramanian Muthu ,  Chin Chang

Inventor： Subramanian Muthu ,  Chin Chang

IPC: H05B3702

CPC classification number: G01J1/32 ,  F21V9/40 ,  F21V23/0442 ,  F21W2111/02 ,  F21Y2115/10 ,  G01J3/46 ,  G01J3/463 ,  G01J3/465 ,  G01J3/50 ,  G01J3/501 ,  G02B6/003 ,  G08G1/095 ,  H05B33/0803 ,  H05B33/0818 ,  H05B33/086 ,  H05B33/0863 ,  H05B33/0869

Abstract: The combined light output (chromaticity) of a white light emitting LED luminaire is electronically controlled based on measurements by a single photodiode arranged to measure the light outputs of at least a plurality of the LEDs in the array. This is accomplished by measuring the light output of the LEDs in each color separately in a sequence of time pulses. For an array of red, green, and blue LEDs there are three time pulses in a measuring sequence. During each time pulse, the current for the color being measured is turned off. The response time of a typical photodiode is extremely short, so the measuring sequence can be performed in a sufficiently short time that an-observer will not detect it (e.g. 10 ms). Measured light outputs for the colors are compared to desired outputs, which may be set by user controls, and changes to the power supply for the color blocks are made as necessary. Chromaticity is thus automatically controlled without regard to the factors which may cause it to change. The user inputs permit varying the desired chromaticity to either warm white (more red output) or cool white (more blue output).

Abstract translation: 基于被布置为测量阵列中的至少多个LED的光输出的单个光电二极管的测量，电子控制白光发射LED灯具的组合光输出（色度）。 这是通过以时间脉冲序列分别测量每种颜色的LED的光输出来实现的。 对于红色，绿色和蓝色LED阵列，测量顺序中有三个时间脉冲。 在每个时间脉冲期间，被测量的颜色的电流被关闭。 典型的光电二极管的响应时间非常短，所以可以在足够短的时间内执行测量序列，观察者将不会检测它（例如10ms）。 将颜色的测量光输出与可由用户控制设置的所需输出进行比较，并根据需要进行颜色块的电源更改。 因此，色度自动控制，而不考虑可能导致其改变的因素。 用户输入允许将所需色度改变为暖白色（更多红色输出）或冷白色（更蓝色输出）。

公开(公告)号：US06201353B1

公开(公告)日：2001-03-13

申请号：US09431585

申请日：1999-11-01

Applicant: Chin Chang ,  Shaomin Peng

Inventor： Chin Chang ,  Shaomin Peng

IPC: H05B3700

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

Abstract: A lighting system comprising a plurality of light-emitting diodes and a current driver for driving current through a plurality of parallel disposed, electrically conductive branches, wherein the branches comprise at least one cell. 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. A set of corresponding light-emitting diodes together with the shunt couplings define a cell. The branches along with the shunts are coupled in a specifiable lattice arrangement.

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流驱动器，其中所述分支包括至少一个单元。 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。 一组相应的发光二极管与分流耦合器一起定义一个单元。 分支与分流器以可指定的晶格布置耦合。

公开(公告)号：US08344703B2

公开(公告)日：2013-01-01

申请号：US12716173

申请日：2010-03-02

Applicant: Chin Chang ,  Veter Chang

Inventor： Chin Chang ,  Veter Chang

IPC: H02J7/00

CPC classification number: H02J7/00

Abstract: An apparatus and method of controlling power converters is achieved that produces high light-load efficiency and reduced output voltage ripple while maintaining quiet operation that is free from audible noise. The inventive method includes a variable on-time control circuit that is applicable to a wide variety of switching mode converters, including, but not limited to, boost converters, buck converters, buck-boost converters, single-ended primary inductor (SEPIC) converters, and other converter topologies, both isolated and non-isolated.

Abstract translation: 实现了一种控制功率转换器的装置和方法，其产生高的轻负载效率和降低的输出电压纹波，同时保持无噪声的静音操作。 本发明的方法包括可变导通时间控制电路，其可应用于各种开关模式转换器，包括但不限于升压转换器，降压转换器，降压 - 升压转换器，单端初级电感器（SEPIC）转换器 ，以及其他转换器拓扑，分离和非隔离。

公开(公告)号：US20050053515A1

公开(公告)日：2005-03-10

申请号：US10660354

申请日：2003-09-10

Applicant: Stephen Yates ,  Felipe Fuentes ,  Peter Michalakos ,  Chin Chang ,  Brian Krafthefer ,  Mark Kaiser

Inventor： Stephen Yates ,  Felipe Fuentes ,  Peter Michalakos ,  Chin Chang ,  Brian Krafthefer ,  Mark Kaiser

IPC: A61L9/16 ,  A61L9/20 ,  B01D53/04 ,  B01D53/86 ,  B64D13/00

CPC classification number: B01D53/8668 ,  A61L9/16 ,  A61L9/20 ,  B01D53/04 ,  B01D53/0446 ,  B01D2253/102 ,  B01D2253/308 ,  B01D2255/802 ,  B01D2257/708 ,  B01D2259/41 ,  B01D2259/4508 ,  B01D2259/4575 ,  B64D13/00 ,  B64D2013/0651 ,  F24F2003/1628

Abstract: An air quality system comprising at least one air cleaner unit in communication with an interior air space. In one embodiment, an air quality system for an aircraft comprises a first set of air cleaner units in communication with a lower plenum of the aircraft recirculation system and a second set of air cleaner units in communication with an upper plenum of the aircraft recirculation system. Each air cleaner unit comprises at least one adsorbent unit in combination with at least one photocatalytic oxidation unit. In one embodiment, an air cleaner unit comprises a relatively weak adsorbent material upstream from a photocatalytic oxidation unit, and a relatively strong adsorbent material downstream from the photocatalytic oxidation unit. Methods for removing a pollutant from an air stream and for making an air cleaner unit are also disclosed.

Abstract translation: 空气质量系统，包括与内部空气空间连通的至少一个空气净化器单元。 在一个实施例中，用于飞行器的空气质量系统包括与飞机再循环系统的下部通风室连通的第一组空气净化器单元和与飞行器再循环系统的上部空间连通的第二组空气净化器单元。 每个空气净化器单元包括与至少一个光催化氧化单元组合的至少一个吸附单元。 在一个实施方案中，空气净化器单元包括来自光催化氧化单元上游的相对较弱的吸附材料和在光催化氧化单元下游的较强吸附材料。 还公开了从空气流中除去污染物和制造空气净化器单元的方法。

公开(公告)号：US06768047B2

公开(公告)日：2004-07-27

申请号：US10170906

申请日：2002-06-13

Applicant: Chin Chang ,  Gert W. Bruning

Inventor： Chin Chang ,  Gert W. Bruning

IPC: H01L31042

CPC classification number: H05B33/0815 ,  H02J7/35 ,  H02M3/1582 ,  H05B33/0803 ,  H05B33/0818 ,  H05B37/00 ,  Y10S136/291 ,  Y10S136/293 ,  Y10S323/906 ,  Y10S362/80

Abstract: An autonomous solid state lighting system has a charge mode which collects energy and produces electric power with a solid state energy source, converts the voltage of the electric power using a bi-directional power converter, and stores the power in an energy storage device. A discharge mode draws electric power from the energy storage device, converts the voltage of the electric power using the bi-directional power converter, and produces light from a solid state light source. A controller controls the charge and discharge modes. In one embodiment, the solid state energy source can be a solar cell panel, the solid state light source can be an LED module, and the energy storage device can be a battery pack.

Abstract translation: 自主固态照明系统具有收集能量并利用固态能源产生电力的充电模式，使用双向电力转换器转换电力的电压，并将电力存储在能量存储装置中。 放电模式从能量存储装置抽取电力，使用双向电力转换器转换电力的电压，并从固态光源产生光。 控制器控制充电和放电模式。 在一个实施例中，固态能源可以是太阳能电池板，固态光源可以是LED模块，并且能量存储装置可以是电池组。

公开(公告)号：US06552495B1

公开(公告)日：2003-04-22

申请号：US10024737

申请日：2001-12-19

Applicant: Chin Chang

Inventor： Chin Chang

IPC: H05B3700

CPC classification number: H05B33/086 ,  F21V23/04 ,  F21V23/0457 ,  H05B33/0869

Abstract: The present invention is directed to a control system for generating a desired light color by a plurality of Red, Green and Blue light emitting diodes (LEDs) comprised of a sensor responsive to a light color generated by the plurality of LEDs to measure the color coordinates of the generated light where the color coordinates are defined in a first color space. A first transformation module is provided, coupled to the sensor to transform the coordinates of the generated light to a second color space. A second transformation module is configured to provide reference color coordinates corresponding to the desired light, where the reference color coordinates are expressed in the second color space. An adder is provided, coupled to the transformation module and the reference module configured to generate an error color coordinate corresponding to a difference between the desired light color coordinates and the generated light color coordinates. A driver module is coupled to the adder and configured to generate a drive signal for driving the LEDs.

Abstract translation: 本发明涉及一种用于通过多个红色，绿色和蓝色发光二极管（LED）产生期望的光色的控制系统，所述红色，绿色和蓝色发光二极管（LED）响应于由所述多个LED产生的光颜色来响应于测量颜色坐标 其中颜色坐标在第一颜色空间中被定义。 提供第一变换模块，耦合到传感器以将生成的光的坐标转换成第二颜色空间。 第二变换模块被配置为提供对应于期望光的参考颜色坐标，其中参考颜色坐标在第二颜色空间中表示。 提供加法器，耦合到变换模块和参考模块，该参考模块被配置为产生对应于期望的光色坐标和产生的光色坐标之间的差的误差色坐标。 驱动器模块耦合到加法器并被配置为产生用于驱动LED的驱动信号。