公开(公告)号：US4581696A

公开(公告)日：1986-04-08

申请号：US596330

申请日：1984-04-03

申请人： Laszlo Gyugyi ,  Theodore M. Heinrich ,  Gyu-Hyeong Cho

发明人： Laszlo Gyugyi ,  Theodore M. Heinrich ,  Gyu-Hyeong Cho

IPC分类号： H02M5/27 ,  H02M5/257

CPC分类号： H02M5/273

摘要： In a pulse-width modulated unrestricted frequency changer (UFC) the harmonic contents of the input current are minimized by splitting the active time intervals within the fundamental time frame into at least two pulses which are located within such time frame and controlled in width as if individual PWM single-pulse UFC's were controlled having a phase shift between each other so as to eliminate or reduce undesired frequency components. Such elimination or minimization of selected frequency components is used to reduce the size of the lowpass filter at the input of the UFC, namely by allowing a higher cut-off resonance limit.

摘要翻译： 在脉冲宽度调制的无限制频率变换器（UFC）中，通过将基本时间帧内的有效时间间隔分成至少两个脉冲，使输入电流的谐波内容最小化，这两个脉冲位于这样的时间范围内，如图 单个PWM单脉冲UFC被控制为具有彼此之间的相移，以便消除或减少不期望的频率分量。 使用所选频率分量的这种消除或最小化来减小在UFC的输入处的低通滤波器的尺寸，即通过允许更高的截止共振极限。

公开(公告)号：US4578746A

公开(公告)日：1986-03-25

申请号：US596329

申请日：1984-04-03

申请人： Laszlo Gyugyi ,  Theodore M. Heinrich ,  Gyu-Hyeong Cho

发明人： Laszlo Gyugyi ,  Theodore M. Heinrich ,  Gyu-Hyeong Cho

IPC分类号： H02M5/27 ,  H02P27/16 ,  H02M5/257

CPC分类号： H02P27/16 ,  H02M5/271

摘要： In a static frequency changer controlled by adjusting the time of conduction of the bilateral switching units forming static converters, the time of conduction is split into n time intervals of respective subdurations adding up to be equivalent to the effective time of conduction of the controlled switching unit, and such subdurations are spread and distributed throughout the time period of control of the switching unit both within the original switching pattern of each converter and between the effective times of conduction of the respective converters, thereby to minimize harmonic distortion of the input supply current of the frequency changer.

摘要翻译： 在通过调节形成静态转换器的双向开关单元的导通时间来控制的静态变频器中，将导通时间分成n个相应的子区间的时间间隔，加到等于受控开关单元的有效传导时间 ，并且在每个转换器的原始切换模式中的切换单元的控制的整个时间段内，并且在各个转换器的有效传导时间之间扩展和分布这样的子集，从而最小化输入电源电流的谐波失真 变频器。

公开(公告)号：US08462145B2

公开(公告)日：2013-06-11

申请号：US12639117

申请日：2009-12-16

申请人： Hyoung-Rae Kim ,  Yong-Joon Jeon ,  Gyu-Hyeong Cho ,  Sung-Woo Lee ,  Hyung-Min Lee ,  Yoon-Kyung Choi

发明人： Hyoung-Rae Kim ,  Yong-Joon Jeon ,  Gyu-Hyeong Cho ,  Sung-Woo Lee ,  Hyung-Min Lee ,  Yoon-Kyung Choi

IPC分类号： G06F3/038

CPC分类号： H03M1/0682 ,  G09G3/3648 ,  G09G3/3688 ,  G09G2310/027 ,  G09G2310/0272 ,  H03M1/68 ,  H03M1/745 ,  H03M1/765 ,  H03M1/802

摘要： A digital-to-analog converter includes a voltage-to-current converter, a current-mode digital-to-analog converter and an operational amplifier. The voltage-to-current converter generates a first current signal, and the current-mode digital-to-analog converter generates a second current signal. The operational amplifier modulates a drain current in response to the second current signal and generates an output signal having an offset.

摘要翻译： 数模转换器包括电压 - 电流转换器，电流模式数模转换器和运算放大器。 电压 - 电流转换器产生第一电流信号，并且电流模式数模转换器产生第二电流信号。 运算放大器响应于第二电流信号调制漏极电流并产生具有偏移的输出信号。

公开(公告)号：US20100097360A1

公开(公告)日：2010-04-22

申请号：US12578046

申请日：2009-10-13

申请人： Gyu-Hyeong Cho ,  Yong-Joon Jeon ,  Jin-Yong Jeon ,  Seung-Chul Jung ,  Ki-Duk Kim ,  Sung-Woo Lee

发明人： Gyu-Hyeong Cho ,  Yong-Joon Jeon ,  Jin-Yong Jeon ,  Seung-Chul Jung ,  Ki-Duk Kim ,  Sung-Woo Lee

IPC分类号： G09G5/00

CPC分类号： G09G3/325 ,  G09G3/3283 ,  G09G2300/0842 ,  G09G2310/027 ,  G09G2320/0223 ,  G09G2320/0295

摘要： Disclosed is a display driving apparatus. The display driving apparatus comprises: a current DAC generating a data current; a data line connected to a pixel circuit requiring data writing on a matrix array of a display panel; an adjacent data line located adjacent to the data line; a current mirror feedbacking an excessive charging current generating due to parasitic capacitance of the adjacent data line as a charging current for charging parasitic capacitance of the data line; a current output unit connected to the current mirror and including a first driving transistor unit for driving the data line, and a second driving transistor unit for driving the adjacent data line; a source follower driving the current output unit according to an output node voltage of the current DAC; and a first constant current source discharging parasitic capacitance excessively charged in the data line and the adjacent data line.

摘要翻译： 公开了一种显示驱动装置。 显示驱动装置包括：产生数据电流的电流DAC; 连接到需要在显示面板的矩阵阵列上进行数据写入的像素电路的数据线; 邻近数据线的相邻数据线; 电流镜反馈由于相邻数据线的寄生电容而产生的过充电电流作为用于对数据线的寄生电容进行充电的充电电流; 连接到电流镜并包括用于驱动数据线的第一驱动晶体管单元的电流输出单元和用于驱动相邻数据线的第二驱动晶体管单元; 源极跟随器，根据电流DAC的输出节点电压驱动电流输出单元; 以及对数据线和相邻数据线过充电的寄生电容放电的第一恒流源。

公开(公告)号：US20080238327A1

公开(公告)日：2008-10-02

申请号：US11693819

申请日：2007-03-30

申请人： Gyu-Hyeong Cho ,  Young-Suk Son ,  Sang-Kyung Kim ,  Jin-Yong Jeon ,  Gun-Ho Lee

发明人： Gyu-Hyeong Cho ,  Young-Suk Son ,  Sang-Kyung Kim ,  Jin-Yong Jeon ,  Gun-Ho Lee

IPC分类号： G09G3/12

CPC分类号： G09G3/3283 ,  G09G3/3241 ,  G09G2300/043 ,  G09G2310/0248 ,  G09G2320/0223 ,  G09G2320/0252

摘要： Disclosed herein is an Active Matrix Organic Light-Emitting-Diode (AMOLED) drive circuit using transient current feedback. The AMOLED drive circuit includes a current Digital-to-Analog Converter (DAC), a data line drive transistor, a constant current source, a variable current source, a differential amplifier, and a transient charging current control unit. The DAC generates current corresponding to input digital data. The data line drive transistor is configured such that the drain terminal thereof is connected to the output node of the current DAC. The constant current source is connected between the source terminal of the data line drive transistor and a ground. The variable current source is connected between both the output node of the current DAC and the drain terminal of the drive transistor, and a voltage source. The differential amplifier is configured to input the output voltage thereof to the gate terminal of the drive transistor. The transient charging current control unit is configured to increase or decrease the bias current of the variable current source depending on variation in the voltage of the output node of the current DAC.

摘要翻译： 本文公开了使用瞬态电流反馈的有源矩阵有机发光二极管（AMOLED）驱动电路。 AMOLED驱动电路包括当前的数模转换器（DAC），数据线驱动晶体管，恒流源，可变电流源，差分放大器和瞬态充电电流控制单元。 DAC产生对应于输入数字数据的电流。 数据线驱动晶体管被配置成使得其漏极端子连接到电流DAC的输出节点。 恒流源连接在数据线驱动晶体管的源极端子和地之间。 可变电流源连接在电流DAC的输出节点和驱动晶体管的漏极端子和电压源之间。 差分放大器被配置为将其输出电压输入到驱动晶体管的栅极端子。 瞬态充电电流控制单元被配置为根据当前DAC的输出节点的电压变化来增加或减小可变电流源的偏置电流。

公开(公告)号：US4740881A

公开(公告)日：1988-04-26

申请号：US994

申请日：1987-01-07

申请人： Sun-Soon Park ,  Gyu-Hyeong Cho

发明人： Sun-Soon Park ,  Gyu-Hyeong Cho

IPC分类号： H02P27/06 ,  H02M7/515 ,  H02M7/521

CPC分类号： H02M7/521 ,  H02M7/5152

摘要： A simultaneous recovery commutation current source inverter is provided by connecting three AC output terminals of a main inverter and an auxiliary inverter in parallel with each other and to three terminals of an induction motor, providing a high AC impedance DC current source through inductors connected in series to a variable DC electric source so that DC electric power is supplied to both sides of a main DC bus of the main inverter, providing a low AC impedance DC voltage source by supplying DC electric power to both sides of an auxiliary DC bus of the auxiliary inverter through a rectifying circuit from the respective connecting points of the main inverter, auxiliary inverter and the three motor terminals. Snubber circuits may be added to the respective semiconductor elements for safe switching operation.

摘要翻译： 通过将主逆变器和辅助逆变器的三个AC输出端子并联连接到感应电动机的三个端子来提供同时复原换向电流源逆变器，通过串联连接的电感器提供高AC阻抗直流电流源 连接到可变直流电源，使得DC电力被供应到主逆变器的主DC总线的两侧，通过向辅助辅助DC总线的两侧提供DC电力来提供低AC阻抗DC电压源 变频器通过整流电路从主变频器，辅助变频器和三个电机端子各自的连接点。 可以将缓冲电路添加到各个半导体元件中以进行安全开关操作。

公开(公告)号：US08212749B2

公开(公告)日：2012-07-03

申请号：US11693819

申请日：2007-03-30

申请人： Gyu-Hyeong Cho ,  Young-Suk Son ,  Sang-Kyung Kim ,  Jin-Yong Jeon ,  Gun-Ho Lee

发明人： Gyu-Hyeong Cho ,  Young-Suk Son ,  Sang-Kyung Kim ,  Jin-Yong Jeon ,  Gun-Ho Lee

IPC分类号： G09G3/32

CPC分类号： G09G3/3283 ,  G09G3/3241 ,  G09G2300/043 ,  G09G2310/0248 ,  G09G2320/0223 ,  G09G2320/0252

摘要： Disclosed herein is an Active Matrix Organic Light-Emitting-Diode (AMOLED) drive circuit using transient current feedback. The AMOLED drive circuit includes a current Digital-to-Analog Converter (DAC), a data line drive transistor, a constant current source, a variable current source, a differential amplifier, and a transient charging current control unit. The DAC generates current corresponding to input digital data. The data line drive transistor is configured such that the drain terminal thereof is connected to the output node of the current DAC. The constant current source is connected between the source terminal of the data line drive transistor and a ground. The variable current source is connected between both the output node of the current DAC and the drain terminal of the drive transistor, and a voltage source. The differential amplifier is configured to input the output voltage thereof to the gate terminal of the drive transistor. The transient charging current control unit is configured to increase or decrease the bias current of the variable current source depending on variation in the voltage of the output node of the current DAC.

摘要翻译： 本文公开了使用瞬态电流反馈的有源矩阵有机发光二极管（AMOLED）驱动电路。 AMOLED驱动电路包括当前的数模转换器（DAC），数据线驱动晶体管，恒流源，可变电流源，差分放大器和瞬态充电电流控制单元。 DAC产生对应于输入数字数据的电流。 数据线驱动晶体管被配置成使得其漏极端子连接到电流DAC的输出节点。 恒流源连接在数据线驱动晶体管的源极端子和地之间。 可变电流源连接在电流DAC的输出节点和驱动晶体管的漏极端子和电压源之间。 差分放大器被配置为将其输出电压输入到驱动晶体管的栅极端子。 瞬态充电电流控制单元被配置为根据当前DAC的输出节点的电压变化来增加或减小可变电流源的偏置电流。

公开(公告)号：US20110199248A1

公开(公告)日：2011-08-18

申请号：US13024848

申请日：2011-02-10

申请人： Ji-Hum Kim ,  Joon- Ho Na ,  Kyu-Sung Park ,  Gyu-Hyeong Cho

发明人： Ji-Hum Kim ,  Joon- Ho Na ,  Kyu-Sung Park ,  Gyu-Hyeong Cho

IPC分类号： H03M1/66

CPC分类号： H03M1/687 ,  H03M1/0682 ,  H03M1/765

摘要： A digital-to-analog converter of a data driver and a converting method thereof, in which information corresponding to a lower bit is converted into an analog signal through control of current transmission paths and control of a transconductance ratio. Input data corresponding to a lower bit is converted into an analog signal through control of current transmission paths and control of a transconductance ratio between a delta current generation section and an output buffer amplifier. As a consequence, not only the area of a data driver can be significantly reduced, but also the delta current generation section can be realized even without using a common node feedback circuit, whereby an additional increase in area is not caused.

摘要翻译： 数据驱动器的数模转换器及其转换方法，其中通过控制当前传输路径和跨导比的控制将对应于较低位的信息转换为模拟信号。 对应于较低位的输入数据通过控制当前传输路径并控制增量电流产生部分和输出缓冲放大器之间的跨导比转换为模拟信号。 因此，不仅可以显着地减少数据驱动器的面积，而且即使不使用公共节点反馈电路也可以实现增量电流生成部，由此不会引起面积的额外增加。

公开(公告)号：US07605792B2

公开(公告)日：2009-10-20

申请号：US11367864

申请日：2006-03-03

申请人： Young-Suk Son ,  Sang-Kyung Kim ,  Gyu-Hyeong Cho

发明人： Young-Suk Son ,  Sang-Kyung Kim ,  Gyu-Hyeong Cho

IPC分类号： G09G3/36

CPC分类号： G09G3/3233 ,  G09G3/2014 ,  G09G2300/0857 ,  G09G2310/066

摘要： Disclosed herein is a driving method and circuit for the automatic voltage output of an active matrix organic light emitting device, which is capable of resolving the non-uniformity of brightness between pixels. The circuit of the present invention includes timing generation means for generating a data drive start signal; sweep voltage generation means for generating a sweep voltage signal in response to output of the timing generation means; current level detection means for sensing an amount of current, which flows into pixels, based on output of the sweep voltage generation means, and outputting a sensing result to a data line; comparison means for comparing output of the current level detection means with a reference signal that determines stop timing for data writing, and outputting a comparison result; and data writing start/end control signal generation means for starting to operate in response to the output of the timing generation means, and generating data writing start and end control signals to a program stop line of a display panel. The invention can shorten data writing time and improve the precision of data writing. Furthermore, the present invention can simplify a data drive circuit and achieve the uniformity of brightness between pixels.

摘要翻译： 这里公开了一种用于有源矩阵有机发光器件的自动电压输出的驱动方法和电路，其能够解决像素之间的亮度的不均匀性。 本发明的电路包括用于产生数据驱动开始信号的定时产生装置; 扫描电压产生装置，用于响应于定时产生装置的输出产生扫描电压信号; 电流电平检测装置，用于基于扫描电压产生装置的输出来感测流入像素的电流量，并将感测结果输出到数据线; 比较装置，用于将电流电平检测装置的输出与确定数据写入的停止定时的参考信号进行比较，并输出比较结果; 以及数据写入开始/结束控制信号发生装置，用于响应于定时产生装置的输出开始工作，并且向显示面板的程序停止线产生数据写入开始和结束控制信号。 本发明可以缩短数据写入时间，提高数据写入精度。 此外，本发明可以简化数据驱动电路并实现像素之间的亮度的均匀性。

公开(公告)号：US07388336B2

公开(公告)日：2008-06-17

申请号：US11760071

申请日：2007-06-08

申请人： Gyu-Hyeong Cho ,  Sang-Kyung Kim ,  Hee-Seok Han

发明人： Gyu-Hyeong Cho ,  Sang-Kyung Kim ,  Hee-Seok Han

IPC分类号： H05B37/02

CPC分类号： H05B41/2824 ,  H05B41/2822 ,  H05B41/3921 ,  Y10S315/07

摘要： A discharge lamp driving circuit includes an inverter, a ballast capacitor, a discharge lamp, and a lamp current detecting circuit. The inverter converts a DC voltage into an AC voltage with high frequency to output the AC voltage to an output port based on a pulse width modulation control signal. The lamp current detecting circuit outputs a first voltage signal and a second voltage signal according to a voltage across the ballast capacitor to generate a lamp current sensing voltage that is proportional to a lamp current flowing through the discharge lamp. The pulse width modulation control signal has a width varying with amplitude of the lamp current so that the lamp current may be accurately detected.

摘要翻译： 放电灯驱动电路包括逆变器，镇流电容器，放电灯和灯电流检测电路。 逆变器将直流电压转换为高频的交流电压，以将脉冲宽度调制控制信号的交流电压输出到输出端口。 灯电流检测电路根据镇流电容器两端的电压输出第一电压信号和第二电压信号，以产生与流过放电灯的灯电流成比例的灯电流检测电压。 脉冲宽度调制控制信号的宽度随着灯电流的振幅而变化，从而可以准确地检测灯电流。