公开(公告)号：US20070228991A1

公开(公告)日：2007-10-04

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： H05B39/04

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：US20070236445A1

公开(公告)日：2007-10-11

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：US20100109563A1

公开(公告)日：2010-05-06

申请号：US12560915

申请日：2009-09-16

申请人： Jung Chul GONG ,  Byoung Own MIN ,  Bon Ahm GOO ,  Sang Cheol SHIN

发明人： Jung Chul GONG ,  Byoung Own MIN ,  Bon Ahm GOO ,  Sang Cheol SHIN

IPC分类号： H05B37/02

CPC分类号： H05B33/0827 ,  G09G3/342 ,  G09G2330/12

摘要： An apparatus for driving multi-light emitting devices that drives a multi-channel light emitting unit having a plurality of light emitting channels connected in parallel with each other, each of which has a plurality of light emitting devices connected in series with each other according to an aspect of the invention may include: a DC/DC converter generating a driving voltage; a current control unit having a plurality of current sources connected between cathodes of the plurality of light emitting channels and a ground; a minimum voltage selection unit detecting a minimum detection voltage among the plurality of detected voltages at the cathodes of the plurality of light emitting channels; a first error detection unit detecting an error voltage determined by the difference between the minimum detection voltage and a predetermined first reference voltage; and a feedback coupling unit supplying the input voltage according to the error voltage and the driving voltage.

摘要翻译： 一种用于驱动多发光器件的装置，其驱动具有彼此并联连接的多个发光通道的多通道发光单元，每个发光单元具有多个根据 本发明的一个方面可以包括：产生驱动电压的DC / DC转换器; 电流控制单元，其具有连接在所述多个发光通道的阴极和地之间的多个电流源; 最小电压选择单元，检测多个发光通道的阴极处的多个检测电压中的最小检测电压; 第一误差检测单元，检测由所述最小检测电压和预定的第一参考电压之间的差确定的误差电压; 以及反馈耦合单元，根据误差电压和驱动电压提供输入电压。

公开(公告)号：US20090058793A1

公开(公告)日：2009-03-05

申请号：US12199344

申请日：2008-08-27

申请人： Sang Cheol SHIN ,  Byoung Own MIN ,  Jung Chul GONG ,  Yu Jin JANG ,  Seung Kon KONG

发明人： Sang Cheol SHIN ,  Byoung Own MIN ,  Jung Chul GONG ,  Yu Jin JANG ,  Seung Kon KONG

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G2310/08 ,  G09G2320/0247

摘要： A backlight unit for synchronization with an image signal for a liquid crystal display (LCD), which can synchronize frequencies of a lamp driving signal and a lamp brightness signal with frequencies of a horizontal synchronization signal and a vertical synchronization signal, which are image signals used in an LCD panel. The backlight unit includes a synchronization part generating a first synchronized signal synchronized with a horizontal synchronization signal having a preset frequency, and a second synchronized signal synchronized with a vertical synchronization signal having a frequency different from the frequency of the horizontal synchronization signal, and a signal generation part generating a lamp driving signal for driving a lamp according to the first synchronized signal and a lamp brightness signal for controlling brightness of the lamp according to the second synchronized signal.

摘要翻译： 一种与用于液晶显示器（LCD）的图像信号同步的背光单元，其可以将灯驱动信号和灯亮度信号的频率与使用的图像信号的水平同步信号和垂直同步信号的频率同步 在LCD面板上。 背光单元包括产生与具有预置频率的水平同步信号同步的第一同步信号的同步部分和与具有与水平同步信号的频率不同的频率的垂直同步信号同步的第二同步信号，以及信号 根据第一同步信号产生用于驱动灯的灯驱动信号的发生部分和根据第二同步信号控制灯的亮度的灯亮度信号。

公开(公告)号：US20090128055A1

公开(公告)日：2009-05-21

申请号：US12254520

申请日：2008-10-20

申请人： Sang Cheol SHIN ,  Byoung Own MIN ,  Jung Chul GONG ,  Yu Jin JANG ,  Seung Kon KONG

发明人： Sang Cheol SHIN ,  Byoung Own MIN ,  Jung Chul GONG ,  Yu Jin JANG ,  Seung Kon KONG

IPC分类号： H05B37/02

CPC分类号： H05B33/0818

摘要： Provided is an apparatus for driving a light emitting element. The apparatus includes a power unit, a light emitting element array, a constant-current circuit unit, and a voltage limiting circuit unit. The power unit supplies driving power. The light emitting element array includes a plurality of light emitting elements connected in series between an anode terminal connected to the power unit and a cathode terminal. The constant-current circuit unit maintains a constant current flowing through the light emitting element array according to a first tuning voltage. The voltage limiting circuit unit is connected between the cathode terminal of the light emitting element array and the constant-current circuit unit, and divides a total voltage applied between the cathode terminal of the light emitting element array and a ground according to a second tuning voltage to limit a voltage applied to the constant-current circuit unit below a predetermined voltage.

摘要翻译： 提供一种驱动发光元件的装置。 该装置包括功率单元，发光元件阵列，恒流电路单元和电压限制电路单元。 电源单元提供驱动电源。 发光元件阵列包括串联连接到电源单元的阳极端子和阴极端子之间的多个发光元件。 恒流电路单元根据第一调谐电压维持流过发光元件阵列的恒定电流。 电压限制电路单元连接在发光元件阵列的阴极端子和恒流电路单元之间，并且根据第二调谐电压将施加在发光元件阵列的阴极端子与地之间的总电压分压 以将施加到恒流电路单元的电压限制在预定电压以下。

公开(公告)号：US20090058467A1

公开(公告)日：2009-03-05

申请号：US12200031

申请日：2008-08-28

申请人： Jung Chul GONG ,  Byoung Own MIN ,  Yu Jin JANG ,  Seung Kon KONG ,  Sang Cheol SHIN

发明人： Jung Chul GONG ,  Byoung Own MIN ,  Yu Jin JANG ,  Seung Kon KONG ,  Sang Cheol SHIN

IPC分类号： H03D13/00

CPC分类号： H03D13/003

摘要： There is provided a phase detection apparatus that can accurately detect a phase difference between an input signal and a reference signal even when the input signal and the reference signal have different duty cycles. A phase detection apparatus according to an aspect of the invention may include: a pulse generation unit generating a first pulse signal on an edge of an input pulse signal, and a second pulse signal based on an edge of a reference pulse signal having a predetermined phase; and a detection unit detecting a phase difference between the first pulse signal and the second pulse signal from the pulse generation unit.

摘要翻译： 提供了即使在输入信号和参考信号具有不同的占空比的情况下，也可以精确地检测输入信号和参考信号之间的相位差的相位检测装置。 根据本发明的一个方面的相位检测装置可以包括：脉冲产生单元，其在输入脉冲信号的边缘上产生第一脉冲信号，以及基于具有预定相位的参考脉冲信号的边沿的第二脉冲信号 ; 以及检测单元，其从所述脉冲发生单元检测所述第一脉冲信号和所述第二脉冲信号之间的相位差。