公开(公告)号：US20110127983A1

公开(公告)日：2011-06-02

申请号：US12627912

申请日：2009-11-30

Applicant: HAO PENG ,  Chin Chang

Inventor： HAO PENG ,  Chin Chang

IPC: G05F1/10

CPC classification number: H02M3/157

Abstract: A system and method for controlling a digital pulse-width modulated power converter achieves a fast large-signal transient response while maintaining a slow response near the steady-state operating point in order to assure stability and to reduce the system's susceptibility to noise. Digital output error samples are processed through a gain scheduling block that applies a non-linear gain function to produce a weak loop response when the system is near its steady-state equilibrium point and a strong loop response when large transients are encountered. The resulting system maintains a fast transient response to large error signals while reducing noise and loop jittering and assuring loop stability.

Abstract translation: 用于控制数字脉宽调制功率转换器的系统和方法实现快速大信号瞬态响应，同时在稳态工作点附近保持较慢的响应，以确保稳定性并降低系统对噪声的敏感性。 当系统接近其稳态平衡点时，数字输出误差样本通过增益调度块进行处理，该增益调度块应用非线性增益函数以产生弱回路响应，当遇到大瞬变时，产生强环回响应。 所产生的系统保持对大误差信号的快速瞬态响应，同时降低噪声和环路抖动并确保环路稳定性。

公开(公告)号：US20070121386A1

公开(公告)日：2007-05-31

申请号：US11624612

申请日：2007-01-18

Applicant: Wen Chiao Ho ,  Chin Chang ,  Kuen Chang ,  Chun Hung

Inventor： Wen Chiao Ho ,  Chin Chang ,  Kuen Chang ,  Chun Hung

IPC: G11C16/04

CPC classification number: G11C16/12 ,  G11C11/5671 ,  G11C16/0475 ,  G11C16/3459

Abstract: The present invention provides a novel method in altering the sequence of multi-level-cell programming in a multi-bit-cell of a nitride trapping memory cell that reduces or eliminates voltage threshold shifts between program steps while avoiding the suppression in the duration of a read window caused by a complementary bit disturbance. In a first embodiment, the present invention programs the multi-level cell in a multi-bit-cell having four bits in the following order: programming a third program level (level3), programming a first program level (level1) and a second program level (level2) to level 1, and programming the second program level from the first program level. In a second embodiment, the present invention programs the multi-level cell in the multi-bit-cell having four bits in the following order: programming a third program level (level3), programming a second program level (level2), and programming a first program level (level1).

Abstract translation: 本发明提供了一种在氮化物俘获存储器单元的多位单元中改变多电平单元编程的顺序的新颖方法，其减少或消除了程序步骤之间的电压阈值偏移，同时避免了在 读取窗口由互补位干扰引起。 在第一实施例中，本发明以具有四位的多位单元按以下顺序对多电平单元进行编程：编程第三程序电平（电平3），编程第一程序电平（电平1）和 第二程序级（级别2）到级别1，并且从第一程序级编程第二程序级。 在第二实施例中，本发明按照以下顺序对具有四位的多位单元中的多电平单元进行编程：编程第三程序电平（级别3），编程第二程序电平（级别2），以及 编程第一个程序级（1级）。

公开(公告)号：US20060082397A1

公开(公告)日：2006-04-20

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和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。 还提供了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：US20060034066A1

公开(公告)日：2006-02-16

申请号：US10914853

申请日：2004-08-11

Applicant: Chin Chang

Inventor： Chin Chang

IPC: F21V21/08

CPC classification number: F21V27/02 ,  F21S4/20 ,  Y10S362/806

Abstract: A chain shape illumination assembly is provided having a plurality of inter-connecting rings wherein each ring comprises a frame member defining a housing portion and a cover for said housing portion. At least one electrical lamp is secured in each housing and an electrical wire having one end electrically connected to each lamp and another end which passes through an opening in the ring and enters through an opening in an adjacent ring wherein it is connected to the lamp in said adjacent ring.

Abstract translation: 提供了具有多个互连环的链形照明组件，其中每个环包括限定壳体部分的框架构件和用于所述壳体部分的盖。 至少一个电灯被固定在每个壳体中，并且电线的一端电连接到每个灯，另一端通过环中的开口并通过相邻环中的开口进入，其中它连接到灯 说相邻的环。

公开(公告)号：US06635817B2

公开(公告)日：2003-10-21

申请号：US10011894

申请日：2001-12-06

Applicant: Chin Chang

Inventor： Chin Chang

IPC: H01L31042

CPC classification number: H01L31/02021 ,  Y02E10/50 ,  Y10S136/291 ,  Y10S136/293 ,  Y10S323/906 ,  Y10T307/50 ,  Y10T307/653

Abstract: A solar cell array is provided having a lattice or matrix structure such that no two solar cell devices are connected purely in series or purely in parallel. Accordingly, if a single solar cell device fails, there is an alternate path by which the output power of all other solar cell devices may contribute to the total output power of the solar cell array. Also, the power output of the entire array is much less sensitive to a low voltage or current for a single solar cell device than in a conventional array where devices are connected in series and in parallel. Beneficially, current setting devices, such as resistors, are provided for better matching the voltages and currents within the array, although in some applications, the resistors can be eliminated, or set to zero. The lattice or matrix structures may be extended in one, two, and three-dimensional patterns.

Abstract translation: 提供具有格子或矩阵结构的太阳能电池阵列，使得没有两个太阳能电池装置纯粹串联或纯并联连接。 因此，如果单个太阳能电池装置发生故障，则存在所有其它太阳能电池装置的输出功率可能有助于太阳能电池阵列的总输出功率的交替路径。 此外，整个阵列的功率输出对于单个太阳能电池器件的低电压或电流比对于串联和并联连接器件的常规阵列更不敏感。 有利的是，提供诸如电阻器的电流设置装置用于更好地匹配阵列内的电压和电流，尽管在一些应用中，可以消除电阻器或将其设置为零。 晶格或矩阵结构可以以一维，二维和三维图案延伸。

公开(公告)号：US06600562B1

公开(公告)日：2003-07-29

申请号：US10043526

申请日：2002-01-11

Applicant: Chin Chang

Inventor： Chin Chang

IPC: G01J351

CPC classification number: G01J3/50 ,  G01J3/46 ,  G01J3/465 ,  G01J3/51 ,  G01J3/513 ,  G01J2001/4252 ,  G01J2003/467

Abstract: The invention provides a method of determining tristimulus values for light emitting diode illuminants. A localized transformation matrix is determined based on a set of spectral responsivity data and a set of color-matching functions. A set of color responses associated with light emitted from the light emitting diode illuminants may be measured, and an estimate of tristimulus values based on the localized transformation matrix and the set of color responses may be determined.

Abstract translation: 本发明提供一种确定发光二极管发光体的三刺激值的方法。 基于一组光谱响应性数据和一组颜色匹配函数来确定局部变换矩阵。 可以测量与从发光二极管照明器发射的光相关联的一组颜色响应，并且可以确定基于局部变换矩阵和颜色响应集合的三刺激值的估计。

公开(公告)号：US06541925B1

公开(公告)日：2003-04-01

申请号：US09195297

申请日：1998-11-18

Applicant: Chin Chang ,  Joseph En-Cheng Chang ,  Gert W. Bruning

Inventor： Chin Chang ,  Joseph En-Cheng Chang ,  Gert W. Bruning

IPC: H05B3702

CPC classification number: H02M7/538 ,  H02M2007/4815 ,  H05B41/2828 ,  Y02B70/1441

Abstract: A resonant converter which may be employed as an electronic ballast for a gas discharge lamp, the converter being in the form of a full or half bridge circuit which includes at least a pair of power switches such as MOSFET's. The gates of the switches are actuated by substantially square wave cyclic gating signals having complementary duty cycle ratios and a frequency somewhat above a resonant frequency of the converter circuit. The energy supply to the lamp is variable in accordance with the duty cycle ratios of the gating signals. In order to avoid generation of high voltage and current transients in the converter when a change in operating state requiring a substantial change in duty cycle ratios of the gating signals is to be performed, as when effecting turn-on or turn-off of the lamp, the changes in the duty cycle ratio are ramped to occur incrementally over several cycles of the gating signals rather than directly to required final values of the duty cycle ratios.

Abstract translation: 可用作气体放电灯的电子镇流器的谐振转换器，该转换器为全桥或半桥电路的形式，其包括至少一对功率开关（例如MOSFET）。 开关的栅极由具有互补占空比的基本上方波的循环门控信号和稍微高于转换器电路的谐振频率的频率致动。 灯的能量供应根据门控信号的占空比而变化。 为了避免产生转换器中的高电压和电流瞬变，当需要进行门控信号的占空比的实质性变化的工作状态改变时，当进行灯的接通或关断时 ，占空比比的变化在门控信号的几个周期上逐渐增加，而不是直接地与占空比的所需最终值相比。

公开(公告)号：US06407935B1

公开(公告)日：2002-06-18

申请号：US09580170

申请日：2000-05-30

Applicant: Chin Chang ,  Gert W. Bruning

Inventor： Chin Chang ,  Gert W. Bruning

IPC: H02J300

CPC classification number: H02M7/53832 ,  H05B41/2827

Abstract: A lamp ballast circuit which provides a magnetizing inductance to a lamp ballast circuit transformer. A DC voltage and current supply source energize a pair of transistors which provide an AC voltage and current. The transformer includes a primary winding that receives the AC voltage and current. At least one lamp is coupled to the transformer secondary winding via a capacitor. The circuit has an optimal magnetizing inductance such that the transformer input voltage and current are substantially in phase with each other, thereby substantially reducing or eliminating the reactive power transferred through the output transformer. In a preferred embodiment, the magnetizing inductance, L102, is given as: L&khgr;=[1−(&ohgr;sC1R1)2]/n2&ohgr;s2C1, wherein &ohgr;s is an operating frequency, C1 is the capacitance of the capacitor, R1 is the resistance of the at least one lamp, and n is the secondary-to-primary side turns ratio of the transformer.

Abstract translation: 一种灯镇流器电路，其向灯镇流电路变压器提供磁化电感。 直流电压和电流源供给一对提供交流电压和电流的晶体管。 变压器包括接收交流电压和电流的初级绕组。 至少一个灯通过电容器耦合到变压器次级绕组。 电路具有最佳的磁化电感，使得变压器输入电压和电流基本上彼此相位，从而大大减少或消除通过输出变压器传送的无功功率。 在一个优选实施例中，磁化电感L102给出为：其中，ωmax是工作频率，C1是电容器的电容，R1是至少一个灯的电阻，n是次级到初级 变压器侧匝数比。

公开(公告)号：US06376999B1

公开(公告)日：2002-04-23

申请号：US09663807

申请日：2000-09-15

Applicant: Yushan Li ,  Chin Chang

Inventor： Yushan Li ,  Chin Chang

IPC: H05B3702

CPC classification number: H05B41/2853 ,  H05B41/2828 ,  Y02B20/186 ,  Y10S315/05

Abstract: An LCD backlight inverter that comprises a power stage that includes a first power switch and a second power switch that powers one or more cold cathode fluorescent lamps. A controller generates control signals, receives an IC supply input signal having a voltage level equaling or exceeding a prescribed threshold level, and provides a steady-state internal oscillation that drives said first and second power switches. A transient prevention circuit maintains said second power switch in a nonconducting state until at least a time at which said IC supply input signal reaches said prescribed voltage threshold. Alternatively, a transient prevention circuit maintains said second power switch in a nonconducting state until at least a time at which said IC supply input signal reaches said prescribed voltage threshold, and additionally prevents the controller oscillator from generating said internally generated oscillation until at least a time at which a supply voltage to the IC reaches a threshold value.

Abstract translation: 一种LCD背光逆变器，包括功率级，功率级包括第一电源开关和为一个或多个冷阴极荧光灯供电的第二电源开关。 控制器产生控制信号，接收具有等于或超过规定阈值电平的电压电平的IC电源输入信号，并提供驱动所述第一和第二电源开关的稳态内部振荡。 瞬态防止电路将所述第二电源开关保持在非导通状态，直到所述IC电源输入信号达到所述规定电压阈值的至少一个时间。 或者，瞬态防止电路将所述第二电源开关保持在非导通状态，直到所述IC电源输入信号达到所述规定电压阈值的至少一个时间，并且另外防止控制器振荡器产生所述内部产生的振荡直到至少一个时间 其中IC的电源电压达到阈值。

公开(公告)号：US06362575B1

公开(公告)日：2002-03-26

申请号：US09713867

申请日：2000-11-16

Applicant: Chin Chang ,  Theo Stommen

Inventor： Chin Chang ,  Theo Stommen

IPC: H05B3702

CPC classification number: H05B41/2827 ,  H05B41/2828 ,  H05B41/2985 ,  H05B41/392 ,  Y10S315/07

Abstract: A method and apparatus for regulating the lamp output voltage in a multiple (parallel) discharge lamp fixture irrespective of the number of operating lamps and based upon monitoring of the lamp filament current. A modification thereof provides constant and equal currents in the discharge lamps irrespective of the number of operating lamps.

Abstract translation: 一种用于调节多个（并联）放电灯固定装置中的灯输出电压的方法和装置，而不管操作灯的数量，并且基于对灯丝电流的监视。 其修改在放电灯中提供恒定和相等的电流，而不管操作灯的数量。