公开(公告)号：US07746318B2

公开(公告)日：2010-06-29

申请号：US11695222

申请日：2007-04-02

申请人： Sang Cheol Shin ,  Byoung Own Min ,  Chang Woo Ha ,  Jung Chul Gong

发明人： Sang Cheol Shin ,  Byoung Own Min ,  Chang Woo Ha ,  Jung Chul Gong

IPC分类号： G09G3/36

CPC分类号： H05B41/386

摘要： An LCD backlight inverter includes a soft starter for generating a soft-start reference voltage gradually increasing as the driving power begins to be supplied. The LCD backlight inverter also includes a first error detector for receiving a first feedback voltage indicating the magnitude of driving current of the lamp and for comparing a smaller value out of a predetermined first reference voltage and the soft-start reference voltage with the first feedback voltage to generate a first error signal corresponding to the difference between the smaller value and the soft-start reference voltage. The LCD backlight inverter further includes a pulse width modulation comparator for comparing the first error signal and a triangle wave oscillation signal to output the pulse width modulation control signal with a predetermined duty ratio. The LCD backlight inverter prevents application of over-current and over-voltage to the LCD backlight to prolong the lifetime of the backlight.

摘要翻译： LCD背光逆变器包括软起动器，用于随着驱动电力开始供给而产生逐渐增加的软启动基准电压。 LCD背光逆变器还包括第一误差检测器，用于接收指示灯的驱动电流的大小的第一反馈电压，并且用于将预定的第一参考电压和软启动参考电压之间的较小值与第一反馈电压进行比较 以产生对应于较小值和软启动参考电压之间的差的第一误差信号。 LCD背光反相器还包括脉冲宽度调制比较器，用于比较第一误差信号和三角波振荡信号，以预定占空比输出脉宽调制控制信号。 LCD背光逆变器可防止对LCD背光产生过电流和过电压，延长背光源的使用寿命。

公开(公告)号：US07515004B2

公开(公告)日：2009-04-07

申请号：US11458577

申请日：2006-07-19

申请人： Sang Cheol Shin ,  Byoung Own Min ,  Chang Woo Ha ,  Jung Chul Gong

发明人： Sang Cheol Shin ,  Byoung Own Min ,  Chang Woo Ha ,  Jung Chul Gong

IPC分类号： H03B27/00

CPC分类号： H03K5/1565 ,  H03K3/0322 ,  H03K5/133 ,  H03K2005/00208 ,  H03L7/0995

摘要： A voltage controlled oscillator (VCO) for generating a clock of a 50% duty includes a VCO unit and a duty correction unit. The VCO unit generates first and second signals having a 180° phase difference to each other with an oscillation frequency according to a control voltage to output the first and second signals through first and second oscillation output terminals. The duty correction unit generates a clock signal of a 50% duty according to the first and second signals through the first and second oscillation terminals.

摘要翻译： 用于产生50％占空比的时钟的压控振荡器（VCO）包括VCO单元和占空比校正单元。 VCO单元根据控制电压产生具有振荡频率的180°相位差的第一和第二信号，以通过第一和第二振荡输出端输出第一和第二信号。 占空比校正单元通过第一和第二振荡端子根据第一和第二信号产生50％占空比的时钟信号。

公开(公告)号：US07285922B2

公开(公告)日：2007-10-23

申请号：US11421219

申请日：2006-05-31

申请人： Jung Chul Gong ,  Sang Cheol Shin ,  Byoung Own Min ,  Chang Woo Ha

发明人： Jung Chul Gong ,  Sang Cheol Shin ,  Byoung Own Min ,  Chang Woo Ha

IPC分类号： G05F1/00

CPC分类号： H05B41/2828 ,  H05B41/382 ,  Y02B20/186 ,  Y10S315/05

摘要： The invention relates to a driving apparatus for a CCFL capable of providing a high output voltage necessary for an open lamp and thereby satisfying a voltage standard required to drive the lamp. In the driving apparatus, an inverter made of a switching circuit of a half-bridge structure is used to generate current for driving the lamp. If the lamp is open, a tuning capacitor current of an oscillator, which provides a reference clock for driving a switch of the inverter is incremented so that a clock frequency which is a basis for a switching speed of the inverter is boosted. This consequently increases the switching speed of the inverter and then an output voltage.

摘要翻译： 本发明涉及一种用于CCFL的驱动装置，其能够提供开放灯所需的高输出电压，从而满足驱动灯所需的电压标准。 在驱动装置中，使用由半桥结构的开关电路构成的逆变器来产生用于驱动灯的电流。 如果灯打开，则提供提供用于驱动逆变器的开关的参考时钟的振荡器的调谐电容器电流被增加，从而提高作为逆变器的开关速度的基础的时钟频率。 这因此增加了逆变器的开关速度，然后增加了输出电压。

公开(公告)号：US07737938B2

公开(公告)日：2010-06-15

申请号：US11696529

申请日：2007-04-04

申请人： Jung Chul Gong ,  Byoung Own Min ,  Sang Cheol Shin ,  Chang Woo Ha

发明人： Jung Chul Gong ,  Byoung Own Min ,  Sang Cheol Shin ,  Chang Woo Ha

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G2320/0247

摘要： In a driving circuit for an LCD backlight, a fundamental wave generator generates a triangle wave signal and a square wave signal in accordance with time constant of a time constant circuit including a time constant capacitor. A PWM comparator compares a difference signal between a feedback voltage and a preset reference voltage with the triangle wave signal to generate a PWM signal in response to the comparison result. A signal synchronizer sets a connection node between the time constant capacitor and the fundamental wave generator and an output terminal of the square wave signal in accordance with a power level of the LCD backlight. Also, a driving signal generator generates a driving signal in response to the square wave signal from the fundamental wave generator and the PWM signal from the PWM comparator. The driving circuit enables PWM controlling integrated circuits to be synchronized together.

摘要翻译： 在用于LCD背光的驱动电路中，基波发生器根据包括时间常数电容器的时间常数电路的时间常数产生三角波信号和方波信号。 PWM比较器将反馈电压和预设参考电压之间的差信号与三角波信号进行比较，以响应比较结果产生PWM信号。 信号同步器根据LCD背光源的功率电平设置时间常数电容器和基波发生器之间的连接节点和方波信号的输出端子。 此外，驱动信号发生器响应于来自基波发生器的方波信号和来自PWM比较器的PWM信号而产生驱动信号。 驱动电路使得PWM控制集成电路能够同步在一起。

公开(公告)号：US07471029B2

公开(公告)日：2008-12-30

申请号：US11435744

申请日：2006-05-18

申请人： Chang Woo Ha ,  Jung Chul Gong ,  Sang Cheol Shin ,  Byoung Own Min

发明人： Chang Woo Ha ,  Jung Chul Gong ,  Sang Cheol Shin ,  Byoung Own Min

IPC分类号： H01L41/08

CPC分类号： H02N2/008

摘要： The present invention relates to a frequency-control-type piezo actuator driving circuit. The frequency-control-type piezo actuator driving circuit includes a piezo actuator that is driven by a constant amplitude of driving voltage pulse; a piezo driver that is connected to the piezo actuator so as to drive the piezo actuator; a frequency controller that is connected to the piezo driver so as to measure currents consumed when the piezo driver drives the piezo actuator, to detect a frequency corresponding to the maximum current among the measured currents, and to generate a frequency control signal corresponding to the detected frequency; and a frequency synthesizer that fixes a frequency of the piezo actuator in accordance with the frequency control signal of the frequency controller and generates the fixed frequency to the piezo driver.

摘要翻译： 本发明涉及一种频率控制型压电致动器驱动电路。 频率控制型压电致动器驱动电路包括由恒定振幅的驱动电压脉冲驱动的压电致动器; 压电驱动器，连接到压电致动器以驱动压电致动器; 频率控制器，其连接到所述压电驱动器，以测量当所述压电驱动器驱动所述压电致动器时消耗的电流，以检测与所测量的电流中的最大电流相对应的频率，并且产生与所检测的电流对应的频率控制信号 频率; 以及频率合成器，其根据频率控制器的频率控制信号来固定压电致动器的频率，并将该固定频率产生到压电驱动器。

公开(公告)号：US20070030081A1

公开(公告)日：2007-02-08

申请号：US11458577

申请日：2006-07-19

申请人： Sang Cheol Shin ,  Byoung Own Min ,  Chang Woo Ha ,  Jung Chul Gong

发明人： Sang Cheol Shin ,  Byoung Own Min ,  Chang Woo Ha ,  Jung Chul Gong

IPC分类号： H03B27/00

CPC分类号： H03K5/1565 ,  H03K3/0322 ,  H03K5/133 ,  H03K2005/00208 ,  H03L7/0995

摘要： There is provided a voltage controlled oscillator (VCO) stably generating a clock of a 50% duty from a simple circuit to have an excellent duty correction function in noise. The VCO includes a VCO unit and a duty correction unit. The VCO unit generates first and second signals having a 180° phase difference to each other with an oscillation frequency according to a control voltage to output the first and second signals through first and second oscillation output terminals. The duty correction unit generates a clock signal of a 50% duty according to the first and second signals through the first and second oscillation terminals.

摘要翻译： 提供了一种压控振荡器（VCO），其稳定地从简单电路产生50％占空比的时钟，以在噪声中具有优异的占空比校正功能。 VCO包括VCO单元和占空比校正单元。 VCO单元根据控制电压产生具有振荡频率的180°相位差的第一和第二信号，以通过第一和第二振荡输出端输出第一和第二信号。 占空比校正单元通过第一和第二振荡端子根据第一和第二信号产生50％占空比的时钟信号。

公开(公告)号：US07417471B2

公开(公告)日：2008-08-26

申请号：US11428340

申请日：2006-06-30

申请人： Jung Chul Gong ,  Chang Woo Ha ,  Byoung Own Min

发明人： Jung Chul Gong ,  Chang Woo Ha ,  Byoung Own Min

IPC分类号： H03D1/00

CPC分类号： H03K5/2418 ,  G01R19/16576

摘要： A voltage comparator having hysteresis includes a comparing section that compares an input voltage with a reference voltage so as to output a high-level or low-level signal; and a reference voltage changing section that changes the reference voltage when a low-level signal is output from the comparing section.

摘要翻译： 具有迟滞的电压比较器包括比较部分，其将输入电压与参考电压进行比较，以便输出高电平或低电平信号; 以及参考电压变化部，其在从所述比较部输出低电平信号时，改变所述基准电压。

公开(公告)号：US20070200513A1

公开(公告)日：2007-08-30

申请号：US11566565

申请日：2006-12-04

申请人： Chang Woo Ha ,  Byoung Own Min ,  Jung Chul Gong

发明人： Chang Woo Ha ,  Byoung Own Min ,  Jung Chul Gong

IPC分类号： H05B39/04

CPC分类号： H05B33/0854 ,  H05B33/0827 ,  H05B33/0851

摘要： Disclosed herein is a drive device of a color light emitting diode (LED) backlight, which is capable of uniformly controlling an optical output of an LED regardless of a variation in an ambient temperature and easily changing characteristic data (by referring to a lookup table).The drive device for driving the color LED backlight which includes a plurality of color LED arrays includes a voltage detecting unit for detecting a voltage applied to the color LED backlight, a temperature detecting unit for detecting a temperature of the color LED backlight, a control unit for controlling driving currents which respectively flow in the color LED arrays of the color LED backlight according to the temperature detected by the temperature detecting unit and the voltage detected by the voltage detecting unit, by referring to previously set driving current values, and a multi-channel current source for adjusting amounts of the driving currents which respectively flow in the color LED arrays of the color LED backlight, by the driving current control of the control unit.

摘要翻译： 本文公开了一种彩色发光二极管（LED）背光源的驱动装置，其能够均匀地控制LED的光输出，而不管环境温度的变化和容易改变的特征数据（通过参考查找表） 。 用于驱动包括多个彩色LED阵列的彩色LED背光源的驱动装置包括用于检测施加到彩色LED背光的电压的电压检测单元，用于检测彩色LED背光的温度的温度检测单元，控制单元 用于根据先前设定的驱动电流值来控制分别根据由温度检测单元检测的温度和由电压检测单元检测的电压在彩色LED背光源的彩色LED阵列中流动的驱动电流， 通过控制单元的驱动电流控制来调节分别流过彩色LED背光的彩色LED阵列的驱动电流的量的通道电流源。

公开(公告)号：US07800566B2

公开(公告)日：2010-09-21

申请号：US11565569

申请日：2006-11-30

申请人： Chang Woo Ha ,  Sang Cheol Shin ,  Byoung Own Min

发明人： Chang Woo Ha ,  Sang Cheol Shin ,  Byoung Own Min

IPC分类号： G09G3/32

CPC分类号： H05B33/0827 ,  G09G3/3406 ,  H05B33/0815 ,  Y02B20/347

摘要： Disclosed herein is a drive device of a color light emitting diode (LED) backlight, which is capable of precisely adjusting the forward voltages of color LED arrays for each channel.The drive device for driving the color light emitting diode (LED) backlight which includes a plurality of color LED arrays includes an I/O interface for inputting/outputting a signal, a control unit for controlling a driving voltage and driving current according to a brightness control signal output from the I/O interface, a DC/DC converter for converting an operation voltage into the driving voltage according to the driving voltage control of the control unit, a voltage regulator for regulating the driving voltage output from the DC/DC converter to a reference voltage without ripple, a multi-channel driving unit for converting the reference voltage output from the voltage regulator into forward voltages of the plurality of color LED arrays according to a plurality of control signals, and a current source for adjusting the amount of the driving current flowing in the color LED backlight according to the driving current control of the control unit.

摘要翻译： 这里公开了彩色发光二极管（LED）背光源的驱动装置，其能够精确地调整每个通道的彩色LED阵列的正向电压。 用于驱动包括多个彩色LED阵列的彩色发光二极管（LED）背光的驱动装置包括用于输入/输出信号的I / O接口，用于根据亮度控制驱动电压和驱动电流的控制单元 从I / O接口输出的控制信号，用于根据控制单元的驱动电压控制将工作电压转换为驱动电压的DC / DC转换器，用于调节从DC / DC转换器输出的驱动电压的电压调节器 到没有纹波的参考电压;多通道驱动单元，用于根据多个控制信号将从稳压器输出的参考电压转换成多个彩色LED阵列的正向电压;以及电流源，用于调节 根据控制单元的驱动电流控制在彩色LED背光中流动的驱动电流。

公开(公告)号：US07646181B2

公开(公告)日：2010-01-12

申请号：US11928845

申请日：2007-10-30

申请人： Jeong In Cheon ,  Byoung Own Min ,  Chang Woo Ha ,  Deuk Hee Park

发明人： Jeong In Cheon ,  Byoung Own Min ,  Chang Woo Ha ,  Deuk Hee Park

IPC分类号： G05F1/40 ,  G05F1/56

CPC分类号： H02M3/3376 ,  H02M1/36 ,  H02M2001/0058 ,  Y02B70/1491

摘要： A control circuit of a DC-DC converter is provided. A mode selection section selects an Active Clamp Forward (ACF) or a Logic Link Control (LLC) mode. A soft start section generates a soft start signal in the ACF and LLC modes. A PWM comparison section compares a current detection signal with a feedback signal, a feedback reference signal and the soft start signal in the ACF mode, and generates a PWM signal based on a comparison result. A selection section selects the PWM signal of the PWM comparison section in the ACF mode. A clock generation section generates a clock signal having a fixed frequency in the ACF mode, and generates a clock signal having a frequency based on an operating current and the soft start signal in the LLC mode. A latch section maintains the PWM signal in response to the clock signal in the ACF mode and maintains the clock signal in the LLC mode.

摘要翻译： 提供DC-DC转换器的控制电路。 模式选择部分选择有源钳位前馈（ACF）或逻辑链路控制（LLC）模式。 软启动部分在ACF和LLC模式下产生软启动信号。 PWM比较部分将电流检测信号与ACF模式中的反馈信号，反馈参考信号和软启动信号进行比较，并且基于比较结果生成PWM信号。 选择部分在ACF模式下选择PWM比较部分的PWM信号。 时钟产生部分以ACF模式产生具有固定频率的时钟信号，并且在LLC模式下产生具有基于工作电流的频率和软启动信号的时钟信号。 锁存部分响应于ACF模式中的时钟信号而保持PWM信号，并将时钟信号保持在LLC模式。