公开(公告)号：US07446597B2

公开(公告)日：2008-11-04

申请号：US11554038

申请日：2006-10-30

Applicant: Chung-Che Yu

Inventor： Chung-Che Yu

IPC: G05F3/02

CPC classification number: G05F3/262 ,  H03F2203/45288

Abstract: A voltage-controlled current source and a frequency scanner using the same are provided. The voltage-controlled current source includes an impedance circuit, an amplifier, a transistor, and a current mirror. A first terminal of the impedance circuit is coupled to a common voltage. A first terminal of the amplifier is coupled to a second terminal of the impedance circuit, and a second terminal of the amplifier receives a control voltage. A gate of the transistor is coupled to an output terminal of the amplifier, and a first source/drain of the transistor is coupled to the other terminal of the impedance circuit. The current mirror is coupled to a second drain/source of the transistor, and includes a current output terminal, wherein a current output by the current output terminal is proportional to the current flowing through the transistor.

Abstract translation: 提供压控电流源和使用其的频率扫描器。 压控电流源包括阻抗电路，放大器，晶体管和电流镜。 阻抗电路的第一端子耦合到公共电压。 放大器的第一端子耦合到阻抗电路的第二端子，并且放大器的第二端子接收控制电压。 晶体管的栅极耦合到放大器的输出端，晶体管的第一源/漏耦合到阻抗电路的另一端。 电流镜耦合到晶体管的第二漏极/源极，并且包括电流输出端子，其中由电流输出端子输出的电流与流过晶体管的电流成比例。

公开(公告)号：US20080136343A1

公开(公告)日：2008-06-12

申请号：US11201999

申请日：2005-08-11

Applicant: Chung-Che Yu ,  Chien-Cheng Yang

Inventor： Chung-Che Yu ,  Chien-Cheng Yang

IPC: H05B37/02 ,  H02M7/5387 ,  H05B41/36

CPC classification number: H05B41/2827 ,  H05B41/3925

Abstract: A resonant DC/AC inverter includes a DC power source providing a DC voltage, a half-bridge power switch circuit electrically connected to the DC power source being operative to convert the DC voltage to an AC voltage, a resonant tank electrically connected between an output of the half-bridge power switch circuit and an input of a load being operative to boost and filter the AC voltage to generate an AC power voltage supplied to the load, and a controller being operative to detect a magnitude of current in the load and a magnitude of a voltage across the load and to generate pulse waveforms for turning on and off the half-bridge power switch circuit, wherein the controller substantially instantaneously varies a frequency of the pulse waveforms and a duty cycle of the pulse waveforms so as to operate the resonant DC/AC inverter near a neighborhood of a resonant frequency of the resonant tank regardless of a conduction state of the load and improve the efficiency of the inverter regardless of the higher DC voltage applied to the inverter. Particularly, the resonant DC/AC inverter utilizes a piezoelectric transformer to supply power to a fluorescent lamp which is wildly employed in display panels and is extensively used to provide backlighting for liquid crystal displays (LCDs), especially for backlighting LCD monitors and LCD televisions.

Abstract translation: 谐振DC / AC逆变器包括提供DC电压的DC电源，电连接到直流电源的半桥功率开关电路，其操作以将DC电压转换为AC电压，电连接在输出端 所述半桥电源开关电路的输入和负载的输入端用于升压和过滤所述AC电压以产生提供给所述负载的AC电力电压，以及控制器，用于检测所述负载中的电流的大小，以及 负载上的电压的大小，并产生用于导通和关断半桥电源开关电路的脉冲波形，其中控制器基本瞬时地改变脉冲波形的频率和脉冲波形的占空比，以便操作 谐振回路附近的谐振DC / AC逆变器，无论负载的导通状态如何，并提高了逆变器的效率 施加到逆变器的较高直流电压的ss。 特别地，谐振DC / AC逆变器利用压电变压器向显示面板中广泛使用的荧光灯供电，并广泛用于为液晶显示器（LCD）提供背光，特别是用于背光LCD显示器和液晶电视。

公开(公告)号：US07286014B2

公开(公告)日：2007-10-23

申请号：US11308019

申请日：2006-03-03

Applicant: Chung-Che Yu ,  Shian-Sung Shiu ,  Li-Min Lee

Inventor： Chung-Che Yu ,  Shian-Sung Shiu ,  Li-Min Lee

IPC: H03F3/45

CPC classification number: H03F3/45197 ,  H03F3/45632 ,  H03F2203/45101 ,  H03F2203/45352 ,  H03F2203/45641 ,  H03F2203/45646 ,  H03F2203/45681 ,  H03F2203/45726 ,  H03G1/0088

Abstract: A variable gain device having higher linearity and wider gain range is provided. The variable gain device includes a transduction unit for generating an output current, a control unit for adjusting the current gain of the gain amplifying unit according to a gain control signal, a gain amplifying unit receiving the current signal and generating a gain adjustable current according to the current gain of the control unit, an output DC level control unit controlling the DC level of the output signal of the variable gain device, and an output unit generating an output signal according to the signals output by the output DC level control unit and the gain amplifying unit.

Abstract translation: 提供具有更高线性度和更宽增益范围的可变增益器件。 可变增益装置包括用于产生输出电流的转换单元，用于根据增益控制信号调整增益放大单元的电流增益的控制单元，接收当前信号的增益放大单元，并根据 控制单元的当前增益，控制可变增益装置的输出信号的直流电平的输出直流电平控制单元和根据由输出直流电平控制单元输出的信号产生输出信号的输出单元， 增益放大器。

公开(公告)号：US20070040517A1

公开(公告)日：2007-02-22

申请号：US11306810

申请日：2006-01-12

Applicant: Chung-Che Yu

Inventor： Chung-Che Yu

IPC: H05B41/36

CPC classification number: H05B41/2828 ,  H05B41/2855 ,  H05B41/3927

Abstract: A control circuit for controlling a fluorescent lamp is provided. The control circuit for a fluorescent lamp according to the present invention employs a pulse generator for generating a pulse signal, having a frequency varying within a predetermined range, to control the inverter to drive the fluorescent lamp, and thus reducing visual noises caused by a control circuit for a fluorescent lamp in the conventional arts.

Abstract translation: 提供一种用于控制荧光灯的控制电路。 根据本发明的用于荧光灯的控制电路使用脉冲发生器来产生具有在预定范围内变化的频率的脉冲信号，以控制逆变器驱动荧光灯，从而减少由控制引起的视觉噪声 现有技术中荧光灯的电路。

公开(公告)号：US06538886B2

公开(公告)日：2003-03-25

申请号：US09836189

申请日：2001-04-18

Applicant: Chung Che Yu

Inventor： Chung Che Yu

IPC: H05K720

CPC classification number: G11B33/121 ,  G06F1/20 ,  G11B25/043

Abstract: A bottom-mounted heat sink in a hard disk driver casing includes a base casing, a base, a cover, a faceplate and a heat sink. Multiple slots are provided on the cover, the base is slide fitted to the base casing and the faceplate is locked to a front of the base. A hot air outflow is provided on the faceplate. A gradation is respectively provided in both inner sides of the base to accommodate a partition for the heat sink. At least one fan is fixed in place to a frame having side air outflow beneath the partition. The heat sink is provided at the bottom in parallel with the hard disk driver to achieve a larger and direct contact area with the hard disk driver to draw hot air generated by the hard disk driver, and to bring in cool air into the hard disk driver casing for completing an air convection cycle.

Abstract translation: 硬盘驱动器外壳中的底部安装的散热器包括底座外壳，底座，盖子，面板和散热器。 盖子上设有多个插槽，底座滑动安装在底座上，面板锁在底座前面。 面板上设有热空气流出口。 在基座的两个内侧分别设置渐变以容纳散热器的隔板。 至少有一个风扇被固定到具有侧壁空气流出在隔板下方的框架上。 散热器在底部与硬盘驱动器并行设置，以实现与硬盘驱动器更大的直接接触区域，以吸引由硬盘驱动器产生的热空气，并将冷空气引入硬盘驱动器 完成空气对流循环的套管。

公开(公告)号：US09035557B2

公开(公告)日：2015-05-19

申请号：US13364333

申请日：2012-02-02

Applicant: Shian-Sung Shiu ,  Li-Min Lee ,  Chung-Che Yu

Inventor： Shian-Sung Shiu ,  Li-Min Lee ,  Chung-Che Yu

IPC: H01J7/42 ,  H05B33/08

CPC classification number: H05B33/0887 ,  Y02B20/341

Abstract: A converting controller comprises a power pin, a ground pin, at least one input pin, at least one output pin, at least one set pin and a failure generating circuit. The power pin is adapted to be coupled with a power source to receive electric power for operation, and the ground pin is adapted to be grounded. The input pin is adapted to receive a corresponding input signal and the output pin is used to output a corresponding output signal. The set pin is adapted to set a corresponding operating parameter of the converting controller. The failure generating circuit is coupled with and uses one of the input pin and the set pin as a protection output pin. The failure generating circuit modulates the level of the protection output pin to be a protection logic level when the converting controller is under a protection state.

Abstract translation: 转换控制器包括电源引脚，接地引脚，至少一个输入引脚，至少一个输出引脚，至少一个引脚和故障发生电路。 电源引脚适于与电源耦合以接收用于操作的电力，并且接地引脚适于接地。 输入引脚适于接收相应的输入信号，输出引脚用于输出相应的输出信号。 设定引脚适用于设定转换控制器的对应操作参数。 故障发生电路与输入引脚和设置引脚中的一个耦合并用作保护输出引脚。 当转换控制器处于保护状态时，故障发生电路将保护输出引脚的电平调制为保护逻辑电平。

公开(公告)号：US09000624B2

公开(公告)日：2015-04-07

申请号：US13470363

申请日：2012-05-14

Applicant: Li-Min Lee ,  Zhong-Wei Liu ,  Chung-Che Yu ,  Shian-Sung Shiu

Inventor： Li-Min Lee ,  Zhong-Wei Liu ,  Chung-Che Yu ,  Shian-Sung Shiu

IPC: H01H7/00 ,  H02J4/00

CPC classification number: H02J4/00 ,  Y10T307/702 ,  Y10T307/951

Abstract: A power-good signal generator generates a power-good signal according to a control signal of a controller, and comprises an impedance element, a controlled transistor and a power sequencing free circuit. An end of the impedance element is coupled to a second voltage source. The controlled transistor has first and second input/output ends and a controlled end, wherein the first input/output end is coupled to the other end of the impedance element to generate the power-good signal. An operating state of the controlled transistor is changed in response to the control signal. The power sequencing free circuit is coupled to the controlled end and one of the first input/output end and the second voltage source. When the second voltage source is supplied before the first voltage source, the power sequencing free circuit turns on the controlled transistor to clamp the power-good signal to be lower than a predetermined voltage level.

Abstract translation: 功率良好信号发生器根据控制器的控制信号产生功率良好信号，并且包括阻抗元件，受控晶体管和电力排序自由电路。 阻抗元件的端部耦合到第二电压源。 受控晶体管具有第一和第二输入/输出端和受控端，其中第一输入/输出端耦合到阻抗元件的另一端以产生功率良好信号。 控制晶体管的工作状态响应于控制信号而改变。 电源排序自由电路耦合到受控端和第一输入/输出端和第二电压源中的一个。 当在第一电压源之前提供第二电压源时，电力排序自由电路导通受控晶体管，以将功率良好信号钳位到低于预定电压电平。

公开(公告)号：US08618748B2

公开(公告)日：2013-12-31

申请号：US13192466

申请日：2011-07-28

Applicant: Shian-Sung Shiu ,  Chung-Che Yu ,  Li-Min Lee ,  Ke Peng

Inventor： Shian-Sung Shiu ,  Chung-Che Yu ,  Li-Min Lee ,  Ke Peng

IPC: H05B37/02 ,  G05F1/00

CPC classification number: H05B33/0815 ,  H05B33/0824 ,  Y02B20/341

Abstract: A power converting controller and an LED driving circuit are provided. The power converting controller controls a converting circuit, which converts an input power source into an appropriate power source to drive a load. The power converting controller includes a feedback control unit, an open-circuit judging unit and a protection unit. The feedback control unit controls the converting circuit according to a feedback signal representing the status of the load. As the open-circuit judging unit has judged that the load is continuously in an open-circuit status for a predetermined time length, the open-circuit judging unit generates an open-circuit protection signal. The protection unit is coupled to the feedback control unit and the open-circuit judging unit so as to generate a protection signal as receiving the open-circuit protection signal and thereby the feedback control unit enters a latch status to stop controlling the converting circuit.

Abstract translation: 提供电力转换控制器和LED驱动电路。 电力转换控制器控制转换电路，其将输入电源转换成适当的电源以驱动负载。 电力转换控制器包括反馈控制单元，开路判断单元和保护单元。 反馈控制单元根据表示负载状态的反馈信号控制转换电路。 由于开路判断部判断负载连续处于规定时间长度的开路状态，所以开路判断部生成开路保护信号。 保护单元耦合到反馈控制单元和开路判断单元，以便产生保护信号作为接收开路保护信号，由此反馈控制单元进入锁存状态以停止控制转换电路。

公开(公告)号：US08536804B2

公开(公告)日：2013-09-17

申请号：US13304271

申请日：2011-11-23

Applicant: Chung-Che Yu ,  Shian-Sung Shiu ,  Li-Min Lee ,  Juan-Juan Liu

Inventor： Chung-Che Yu ,  Shian-Sung Shiu ,  Li-Min Lee ,  Juan-Juan Liu

IPC: H05B37/02 ,  G05F1/46

CPC classification number: H02M3/156 ,  H02M2001/0025 ,  H05B33/0815

Abstract: A converting controller is provided and comprises a first comparing unit, a second comparing unit, a duty cycle operating unit and a reference voltage supplying unit. The first comparing unit receives a detecting signal representing a state of the load and a first reference signal, and generates a first comparing signal accordingly. The duty cycle operating unit controls power conversion of the converting circuit according to the first comparing signal. The second comparing unit receives the detecting signal and a second reference signal, and generates a second comparing signal accordingly. The reference voltage supplying unit supplies the first reference signal and adjusts a level of the first reference signal in response to the second comparing signal.

Abstract translation: 提供转换控制器，包括第一比较单元，第二比较单元，占空比操作单元和参考电压提供单元。 第一比较单元接收表示负载状态的检测信号和第一参考信号，并相应地产生第一比较信号。 占空比操作单元根据第一比较信号控制转换电路的功率转换。 第二比较单元接收检测信号和第二参考信号，并相应地产生第二比较信号。 参考电压提供单元响应于第二比较信号提供第一参考信号并调节第一参考信号的电平。

公开(公告)号：US08502461B2

公开(公告)日：2013-08-06

申请号：US13115129

申请日：2011-05-25

Applicant: Shian-Sung Shiu ,  Chung-Che Yu ,  Li-Min Lee

Inventor： Shian-Sung Shiu ,  Chung-Che Yu ,  Li-Min Lee

IPC: H05B37/02 ,  G05F1/00

CPC classification number: H05B33/0848 ,  H05B33/0815

Abstract: A driving circuit, comprising a power supply, a transistor unit and a feedback control circuit, is disclosed. The power supply is adaptor to provide an electric power to drive a load. The transistor unit comprises at least one load coupling end to couple to the load for adjusting an amount of current flowing through the load. The feedback control circuit controls an amount of the electric power provided by the power supply according to a voltage level of the least one load coupling end. Wherein, the feedback control circuit comprises an error amplifying circuit and a feedback control switch. The error amplifying circuit generates an error amplified signal according to the voltage level of the least one load coupling end, and the feedback control switch is coupled to an output of the error amplifying circuit and is switched between a turn-on state and a turn-off state based on a dimming signal.

Abstract translation: 公开了一种包括电源，晶体管单元和反馈控制电路的驱动电路。 电源是适配器，用于提供驱动负载的电力。 晶体管单元包括至少一个耦合到负载的负载耦合端，用于调节流过负载的电流量。 反馈控制电路根据至少一个负载耦合端的电压电平来控制由电源提供的电力的量。 其中，反馈控制电路包括误差放大电路和反馈控制开关。 误差放大电路根据至少一个负载耦合端的电压电平产生误差放大信号，反馈控制开关耦合到误差放大电路的输出，并在导通状态和转向开关状态之间切换， 基于调光信号的关闭状态。