公开(公告)号：US08018177B2

公开(公告)日：2011-09-13

申请号：US12213809

申请日：2008-06-25

申请人： Bon Ahm Goo ,  Byoung Own Min ,  Young Jin Lee ,  Chang Woo Ha ,  Jeong In Cheon

发明人： Bon Ahm Goo ,  Byoung Own Min ,  Young Jin Lee ,  Chang Woo Ha ,  Jeong In Cheon

IPC分类号： H05B41/36

CPC分类号： H05B33/0818

摘要： A dimming buck type light emitting diode (LED) driving apparatus includes a main switch controlling a driving current flowing into an LED; a current detector detecting a driving current flowing into the LED; a power level determination unit determining a level of the driving power; a dimming capacitor for dimming control; a dimming control unit controlling charging and discharging of the dimming capacitor according to a power level determination signal and an enable signal; a reset circuit unit generating a reset signal according to a detection voltage from the current detector and a voltage of the dimming capacitor; a pulse generation unit generating a pulse signal; and a latch set by the pulse signal of the pulse generation unit and reset by the reset signal of the reset circuit unit to generate a switching signal, and turning on and off the main switch using the switching signal.

摘要翻译： 调光降压型发光二极管（LED）驱动装置包括控制流入LED的驱动电流的主开关; 检测流入LED的驱动电流的电流检测器; 功率电平确定单元，确定驱动电力的电平; 调光电容器，用于调光控制; 调光控制单元，根据功率电平确定信号和使能信号控制调光电容器的充电和放电; 复位电路单元，根据来自电流检测器的检测电压和调光电容器的电压产生复位信号; 产生脉冲信号的脉冲产生单元; 以及由脉冲发生单元的脉冲信号设置的锁存器，并通过复位电路单元的复位信号进行复位，以产生开关信号，并使用开关信号接通和断开主开关。

公开(公告)号：US20090322247A1

公开(公告)日：2009-12-31

申请号：US12213809

申请日：2008-06-25

申请人： Bon Ahm Goo ,  Byoung Own Min ,  Young Jin Lee ,  Chang Woo Ha ,  Jeong In Cheon

发明人： Bon Ahm Goo ,  Byoung Own Min ,  Young Jin Lee ,  Chang Woo Ha ,  Jeong In Cheon

IPC分类号： H05B41/36

CPC分类号： H05B33/0818

摘要： A dimming buck type light emitting diode (LED) driving apparatus includes a main switch controlling a driving current flowing into an LED; a current detector detecting a driving current flowing into the LED; a power level determination unit determining a level of the driving power; a dimming capacitor for dimming control; a dimming control unit controlling charging and discharging of the dimming capacitor according to a power level determination signal and an enable signal; a reset circuit unit generating a reset signal according to a detection voltage from the current detector and a voltage of the dimming capacitor; a pulse generation unit generating a pulse signal; and a latch set by the pulse signal of the pulse generation unit and reset by the reset signal of the reset circuit unit to generate a switching signal, and turning on and off the main switch using the switching signal.

摘要翻译： 调光降压型发光二极管（LED）驱动装置包括控制流入LED的驱动电流的主开关; 检测流入LED的驱动电流的电流检测器; 功率电平确定单元，确定驱动电力的电平; 调光电容器，用于调光控制; 调光控制单元，根据功率电平确定信号和使能信号控制调光电容器的充电和放电; 复位电路单元，根据来自电流检测器的检测电压和调光电容器的电压产生复位信号; 产生脉冲信号的脉冲产生单元; 以及由脉冲发生单元的脉冲信号设置的锁存器，并通过复位电路单元的复位信号进行复位，以产生开关信号，并使用开关信号接通和断开主开关。

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。

公开(公告)号：US08643587B2

公开(公告)日：2014-02-04

申请号：US11566505

申请日：2006-12-04

申请人： Chang Woo Ha ,  Byoung Own Min ,  Jeong In Cheon ,  Yu Jin Jang

发明人： Chang Woo Ha ,  Byoung Own Min ,  Jeong In Cheon ,  Yu Jin Jang

IPC分类号： G09G3/36

CPC分类号： G09G3/3413 ,  G09G2310/0235 ,  G09G2320/064 ,  H05B33/0818 ,  Y02B20/347

摘要： In an FSC mode LCD, a controller operates in response to an external adjustment, and a DC/DC converter converts a battery voltage into a driving voltage under control of the controller. A color LED backlight includes first, second and third color LED arrays connected in parallel, which are operated by the driving voltage. An FSC generator generates first, second and third color PWM signals according to an internal sawtooth voltage and a dimming voltage. A 3-channel current source generates first, second and third driving currents under control of the controller, and on/off switches paths of the first, second and third driving currents flowing through the first, second and third color LED arrays according to the first, second and third color PWM signals generated from the FSC generator, thereby adjusting luminance of the first, second and third color LED arrays of the color LED backlight.

摘要翻译： 在FSC模式LCD中，控制器响应于外部调整而工作，并且DC / DC转换器在控制器的控制下将电池电压转换成驱动电压。 彩色LED背光包括由驱动电压操作的并联连接的第一，第二和第三彩色LED阵列。 FSC发生器根据内部锯齿电压和调光电压产生第一，第二和第三颜色PWM信号。 3通道电流源在控制器的控制下产生第一，第二和第三驱动电流，并且根据第一，第二和第三驱动电流在第一，第二和第三彩色LED阵列中的第一，第二和第三驱动电流的开/关 ，从FSC发生器产生的第二和第三颜色PWM信号，从而调整彩色LED背光的第一，第二和第三颜色LED阵列的亮度。

公开(公告)号：US20080164925A1

公开(公告)日：2008-07-10

申请号：US11971199

申请日：2008-01-08

申请人： Jeong In CHEON ,  Byoung Own Min ,  Chang Woo Ha

发明人： Jeong In CHEON ,  Byoung Own Min ,  Chang Woo Ha

IPC分类号： H03K3/017

CPC分类号： H03K4/502

摘要： There is a provided a dual mode clock generator that is applicable to a direct current-direct current converter of a power supply. The dual mode clock generator includes a frequency controller for controlling generation of charge and discharge; a current source unit for generating a charge, and generating a charge; a capacitor for charging a voltage according to the charge current generated by the current source unit; an oscillation controller for controlling switch-on or switch-off to charge and discharge the capacitor; a switch for controlling the charging and discharging of the capacitor through the ON or OFF control of the oscillation controller; and a current sink unit for generating a discharge current according to the second current in the first operation mode and generating a discharge current according to the third current and the fourth current in the second operation mode.

摘要翻译： 提供了一种适用于电源的直流电流转换器的双模式时钟发生器。 双模式时钟发生器包括用于控制充放电的产生的频率控制器; 用于产生电荷并产生电荷的电流源单元; 电容器，用于根据由电流源单元产生的充电电流对电压进行充电; 用于控制开关或关断以对电容器充电和放电的振荡控制器; 用于通过振荡控制器的ON或OFF控制来控制电容器的充电和放电的开关; 以及电流吸收单元，用于根据第一操作模式中的第二电流产生放电电流，并且在第二操作模式中根据第三电流和第四电流产生放电电流。

公开(公告)号：US07741893B2

公开(公告)日：2010-06-22

申请号：US11971199

申请日：2008-01-08

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

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

IPC分类号： H03K3/00

CPC分类号： H03K4/502

摘要： There is a provided a dual mode clock generator that is applicable to a direct current-direct current converter of a power supply. The dual mode clock generator includes a frequency controller for controlling generation of charge and discharge; a current source unit for generating a charge, and generating a charge; a capacitor for charging a voltage according to the charge current generated by the current source unit; an oscillation controller for controlling switch-on or switch-off to charge and discharge the capacitor; a switch for controlling the charging and discharging of the capacitor through the ON or OFF control of the oscillation controller; and a current sink unit for generating a discharge current according to the second current in the first operation mode and generating a discharge current according to the third current and the fourth current in the second operation mode.

摘要翻译： 提供了一种适用于电源的直流电流转换器的双模式时钟发生器。 双模式时钟发生器包括用于控制充放电的产生的频率控制器; 用于产生电荷并产生电荷的电流源单元; 电容器，用于根据由电流源单元产生的充电电流对电压进行充电; 用于控制开关或关断以对电容器充电和放电的振荡控制器; 用于通过振荡控制器的ON或OFF控制来控制电容器的充电和放电的开关; 以及电流吸收单元，用于根据第一操作模式中的第二电流产生放电电流，并且在第二操作模式中根据第三电流和第四电流产生放电电流。

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：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：US07271520B2

公开(公告)日：2007-09-18

申请号：US11435745

申请日：2006-05-18

申请人： Byoung Own Min ,  Chang Woo Ha

发明人： Byoung Own Min ,  Chang Woo Ha

IPC分类号： H01L41/09

CPC分类号： H02N2/0075

摘要： The present invention relates to a piezo actuator driving circuit. The piezo actuator driving circuit includes a pulse generator that generates a first voltage pulse with a constant period; a first driver stage that receives the first voltage pulse of the pulse generator and buffers the first voltage pulse to output; a second driver stage that converts the first voltage pulse, buffered and output in the first driver stage, into a first current pulse to output; a driving voltage maintaining section that is connected to the pulse generator and the second driver stage so as to output a second current pulse for maintaining a constant amplitude of driving voltage pulse; and a piezo actuator that is connected to the second driver stage and the driving voltage maintaining section so as to be charged and discharged by the first and second current pulses and that is driven by the driving voltage pulse with a constant amplitude.

摘要翻译： 本发明涉及压电致动器驱动电路。 压电致动器驱动电路包括产生具有恒定周期的第一电压脉冲的脉冲发生器; 第一驱动器级，接收脉冲发生器的第一电压脉冲并缓冲第一电压脉冲以输出; 将第一驱动级中缓冲和输出的第一电压脉冲转换成第一电流脉冲以输出的第二驱动级; 驱动电压保持部，其连接到所述脉冲发生器和所述第二驱动级，以输出用于维持驱动电压脉冲的恒定幅度的第二电流脉冲; 以及压电致动器，其连接到第二驱动级和驱动电压保持部，以便由第一和第二电流脉冲进行充电和放电，并且由驱动电压脉冲以恒定幅度驱动。