公开(公告)号：US20120086515A1

公开(公告)日：2012-04-12

申请号：US13005054

申请日：2011-01-12

申请人： Jeong Mo YANG ,  Changsik YOO ,  Young-Jin MOON ,  Yong-Seong ROH ,  Joong Ho CHOI ,  Jae Shin LEE ,  Jung Chul GONG ,  Yu Jin JANG

发明人： Jeong Mo YANG ,  Changsik YOO ,  Young-Jin MOON ,  Yong-Seong ROH ,  Joong Ho CHOI ,  Jae Shin LEE ,  Jung Chul GONG ,  Yu Jin JANG

IPC分类号： H03K3/353

CPC分类号： H03K3/354 ,  H03K3/0231 ,  H03K3/03 ,  H03K5/1534

摘要： There is provided relaxation oscillator. The relaxation oscillator includes: a ramp wave generator generating ramp waves by a complementary operation between a first capacitor module charged and discharged according to a first switching signal and a second capacitor module charged and discharged according to a second switching signal; a negative feedback circuit unit generating a compensation voltage for compensating errors with reference voltage by being fedback with the ramp waves; and a switching signal generator generating the first switching signal controlling the charging and discharging of the first capacitor module and the second switching signal controlling the charging and discharging of the second capacitor module from the compensation voltage and the ramp waves. As a result, the present invention can generate ramp waves having a stable frequency while preventing a frequency from being changed due to a delay or an offset of the comparator.

摘要翻译： 提供放松振荡器。 张弛振荡器包括：斜波发生器，通过根据第一开关信号充电和放电的第一电容器模块与根据第二开关信号充放电的第二电容器模块之间的互补操作产生斜波; 负反馈电路单元，通过与斜波反馈产生用于通过参考电压补偿误差的补偿电压; 以及切换信号发生器，其产生控制第一电容器模块的充电和放电的第一开关信号和控制第二电容器模块从补偿电压和斜波的充电和放电的第二开关信号。 结果，本发明可以产生具有稳定频率的斜坡波，同时防止频率由于比较器的延迟或偏移而改变。

公开(公告)号：US20120087160A1

公开(公告)日：2012-04-12

申请号：US13162793

申请日：2011-06-17

申请人： Jeong Mo YANG ,  Chang Sik YOO ,  Yung Jin MOON ,  Yong Seong ROH ,  Joong Ho CHOI ,  Jae Shin LEE ,  Jung Chul GONG ,  Yu Jin JANG

发明人： Jeong Mo YANG ,  Chang Sik YOO ,  Yung Jin MOON ,  Yong Seong ROH ,  Joong Ho CHOI ,  Jae Shin LEE ,  Jung Chul GONG ,  Yu Jin JANG

IPC分类号： H02M1/12

CPC分类号： H02M1/4225 ,  Y02B70/126 ,  Y02P80/112

摘要： There is provided a power factor correction circuit capable of correcting a power factor of a power converting module through increasing an input current by switching a main switching element of a power converting module on the basis of a first reference wave having a slope based on a first signal and an error voltage, in particular, by limiting a switching frequency on the basis of a first reference wave having a slope based on a second signal lower than a first signal and an error voltage when the switching frequency of the main switching element increases because an input voltage of the power converting module is low.

摘要翻译： 提供了一种功率因数校正电路，其能够通过增加输入电流来校正功率转换模块的功率因数，所述功率因数校正电路通过基于第一参考波来切换功率转换模块的主开关元件，所述第一基准波具有基于第一 信号和误差电压，特别是通过基于具有基于低于第一信号的第二信号的斜率的第一参考波和当主开关元件的开关频率增加时的误差电压来限制开关频率，因为 电力转换模块的输入电压低。

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：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：US20100109547A1

公开(公告)日：2010-05-06

申请号：US12437692

申请日：2009-05-08

申请人： Yu Jin JANG ,  Byoung own Min ,  Jung Chul Gong ,  Sang Cheol Shin ,  Jeong In Cheon

发明人： Yu Jin JANG ,  Byoung own Min ,  Jung Chul Gong ,  Sang Cheol Shin ,  Jeong In Cheon

IPC分类号： H05B41/292

CPC分类号： H05B41/2855

摘要： Disclosed is a liquid crystal display (LCD) backlight inverter. The LCD backlight inverter includes a lamp open detection unit outputting a first open detection voltage for a preset time period when it is determined that a predetermined lamp is open, based on a current voltage corresponding to the current of the predetermined lamp of a plurality of lamps, a first open determination unit outputting an open detection signal when the first open detection voltage is input, a second open determination unit outputting a protection signal when it is determined that all of the plurality of lamps are open based on detection voltages of the plurality of lamps, a temporary protection determination unit outputting a frequency change signal when both the open detection signal and the protection signal are input, and an operating frequency control unit changing an operating frequency to a preset protective frequency according to the frequency change.

摘要翻译： 公开了一种液晶显示（LCD）背光逆变器。 LCD背光逆变器包括：灯开路检测单元，基于与多个灯的预定灯的电流相对应的电流电压，当确定预定灯打开时，将预定时间段的第一开路检测电压输出 第一开路判定单元，当输入第一开路检测电压时，输出开路检测信号;第二开路判定单元，基于多个灯的检测电压确定多个灯全部断开时，输出保护信号 灯，当输入开放检测信号和保护信号时输出频率变化信号的临时保护判定单元，以及根据频率变化将工作频率改变为预设保护频率的工作频率控制单元。

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。

公开(公告)号：US20110141085A1

公开(公告)日：2011-06-16

申请号：US12771002

申请日：2010-04-30

申请人： Yu Jin JANG ,  Jin Soo LEE ,  Jeong Mo YANG ,  Jeong In CHEON

发明人： Yu Jin JANG ,  Jin Soo LEE ,  Jeong Mo YANG ,  Jeong In CHEON

IPC分类号： G09G5/00

CPC分类号： H05B41/2858 ,  G09G3/3406 ,  G09G2330/026 ,  H05B41/382 ,  Y02B20/204

摘要： Provided is an initial driving circuit of a backlight unit having a lamp unit provided with a plurality of lamps. In the initial driving circuit, an error amplifying unit 100 detects an error voltage VERO between a feedback voltage VFB corresponding to a current flowing to the lamp unit and a preset first reference voltage Vref11. A soft signal generation unit 200 generates a soft start signal VSS of the lamp unit. A high-frequency signal driving signal generating unit 300 generates a high-frequency driving signal VHF of the of the lamp unit. A high-frequency driving termination determining unit 400 generates a high-frequency driving termination signal SHE when the error voltage VERO is equal in voltage level to the soft start signal VSS. A high-frequency driving signal blocking unit 500 blocks the high-frequency driving signal VHF in advance when the high-frequency driving termination signal SHE is inputted.

摘要翻译： 提供了具有设置有多个灯的灯单元的背光单元的初始驱动电路。 在初始驱动电路中，误差放大单元100检测对应于流向灯单元的电流的反馈电压VFB与预设的第一参考电压Vref11之间的误差电压VERO。 软信号生成单元200生成灯单元的软启动信号VSS。 高频信号驱动信号生成单元300生成灯单元的高频驱动信号VHF。 高频驱动终止确定单元400当软电启动信号VSS的电压电平相等时，产生高频驱动终止信号SHE。 当输入高频驱动终止信号SHE时，高频驱动信号阻断单元500预先阻挡高频驱动信号VHF。

公开(公告)号：US20120229042A1

公开(公告)日：2012-09-13

申请号：US13212836

申请日：2011-08-18

申请人： Yu Jin JANG

发明人： Yu Jin JANG

IPC分类号： H05B37/02

CPC分类号： H05B41/2828

摘要： There is provided an inverter for controlling a backlight using a variable frequency oscillator, the inverter including: a variable frequency oscillator generating a reference waveform having a variable frequency through voltage charged in a first capacitor and voltage discharged therefrom by a current; and a main switching signal generator generating a switching signal for driving a plurality of lamps based on a first error voltage between output voltages corresponding to currents flowing in the lamps and a first reference voltage and the reference waveform, whereby damage of circuit elements such as the lamps, or the like, may be prevented and the brightness of the lamps may be constantly maintained.

摘要翻译： 提供了一种用于使用可变频率振荡器控制背光的逆变器，所述逆变器包括：产生具有在第一电容器中充电的可变频率通过电压的参考波形的可变频率振荡器和通过电流从其放电的电压; 以及主开关信号发生器，其基于在对应于在灯中流动的电流的输出电压和第一参考电压和参考波形之间的第一误差电压产生用于驱动多个灯的开关信号，由此损坏电路元件，例如 灯等，可以防止灯的亮度持续保持。

公开(公告)号：US20110062884A1

公开(公告)日：2011-03-17

申请号：US12646151

申请日：2009-12-23

申请人： Yu Jin JANG ,  Jeong In Cheon

发明人： Yu Jin JANG ,  Jeong In Cheon

IPC分类号： H05B37/02 ,  G05F3/02

CPC分类号： H05B41/285

摘要： There are provided a reference signal generator and a PWM control circuit for LCD backlight. The reference signal generator and the PWM control circuit for LCD backlight may be configured to respectively include: a current control unit that controls generation of a variable current sequentially changing; a current generating unit that generates a variable current changing sequentially; and a reference signal generating unit that controls charging until a charged voltage charged by the variable current generated by the current generating unit reaches a first reference voltage level, starts discharging when the charged voltage reaches the first reference voltage level, controls discharging until the charged voltage reaches a second reference voltage level, and generates a triangular wave reference signal that has a frequency buffering interval in which a frequency sequentially changes when the initial driving completion signal or the protection signal is input.

摘要翻译： 为LCD背光源提供参考信号发生器和PWM控制电路。 参考信号发生器和用于LCD背光的PWM控制电路可以被配置为分别包括：电流控制单元，其控制顺序变化的可变电流的产生; 电流产生单元，其生成顺序变化的可变电流; 以及参考信号生成单元，其控制充电，直到由所述电流产生单元产生的可变电流充电的充电电压达到第一基准电压电平，当充电电压达到第一参考电压电平时开始放电，控制放电直到充电电压 达到第二参考电压电平，并且产生具有频率缓冲间隔的三角波参考信号，其中，当输入初始驱动完成信号或保护信号时，频率顺次改变。