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：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：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：US07609234B2

公开(公告)日：2009-10-27

申请号：US11232819

申请日：2005-09-22

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

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

IPC分类号： G09G3/30

CPC分类号： G09G3/3233 ,  G09G3/2014 ,  G09G3/3258 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0259 ,  G09G2310/0297 ,  G09G2310/066 ,  G09G2320/0233

摘要： Disclosed herein are a pixel circuit and driving method for active matrix Organic Light-emitting Diodes (OLEDs), and a display using the same. The pixel circuit includes a Voltage Control Current Source (VCCS), a high gain amplifier, a storage capacitor, and first and second switches. The VCCS is configured to drive OLEDs. The high gain amplifier is configured such that the control input signal of the VCCS causes the VCCS to be placed in an ON or OFF state. The storage capacitor is located between the input terminal of the high gain amplifier and a data line so as to assign the ON-time of the VCCS. The first and second switches are configured to be controlled through a scan line so as to store voltage in the storage capacitor and control the light-emitting time of the OLEDs, and are formed the input terminal of the high gain amplifier and the input terminal of the VCCS, respectively.

摘要翻译： 这里公开了用于有源矩阵有机发光二极管（OLED）的像素电路和驱动方法以及使用其的显示器。 像素电路包括电压控制电流源（VCCS），高增益放大器，存储电容器以及第一和第二开关。 VCCS配置为驱动OLED。 高增益放大器配置为使得VCCS的控制输入信号使VCCS置于ON或OFF状态。 存储电容器位于高增益放大器的输入端和数据线之间，以分配VCCS的导通时间。 第一和第二开关被配置为通过扫描线进行控制，以将电压存储在存储电容器中并控制OLED的发光时间，并且形成高增益放大器的输入端和输入端 VCCS。

公开(公告)号：US07339511B2

公开(公告)日：2008-03-04

申请号：US11367865

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： H03M1/66

CPC分类号： H03M1/682 ,  G09G3/20 ,  G09G3/2011 ,  G09G2310/027 ,  G09G2310/0272 ,  G09G2310/08 ,  G09G2320/0276

摘要： Disclosed herein are a time division sampling digital to analog converter for a flat panel display, a method of implementing the digital to analog converter, and a data driver circuit using the digital to analog converter. The time division sampling digital to analog converter includes a timing signal generation means for generating timing signals, a data selection means for receiving n-bit digital data, dividing the n-bit digital data into k groups, and outputting the divided digital input data; k reference signal generation means for each outputting 2n/k analog reference signals; a reference signal selection means for receiving the outputs of the reference signal generation means and outputting only 2n/k analog reference signals selected according to a timing signal from the timing signal generation means; a multiplexer for outputting one of reference signals from the reference signal selection means using the n/k-bit digital data from the data selection means as a control input; and a sampling mode analog addition means for sampling and storing the output of the multiplexer according to a timing signal from the timing signal generation means.

摘要翻译： 这里公开了用于平板显示器的时分采样数模转换器，实现数模转换器的方法和使用数模转换器的数据驱动器电路。 时分采样数模转换器包括用于产生定时信号的定时信号产生装置，用于接收n位数字数据的数据选择装置，将n位数字数据分成k组，并输出分割数字输入数据; k个参考信号产生装置，用于每个输出2个/ k个模拟参考信号; 参考信号选择装置，用于接收参考信号产生装置的输出，并且仅输出根据来自定时信号产生装置的定时信号选择的2个/ n / k个模拟参考信号; 多路复用器，用于使用来自数据选择装置的n / k位数字数据作为控制输入，从参考信号选择装置输出参考信号之一; 以及采样模式加法装置，用于根据来自定时信号产生装置的定时信号对多路复用器的输出进行采样和存储。

公开(公告)号：US07283077B2

公开(公告)日：2007-10-16

申请号：US11398868

申请日：2006-04-06

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

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

IPC分类号： H03M1/66

CPC分类号： H03M1/682 ,  H03M1/667

摘要： Disclosed herein is a divide-add circuit and a high-resolution Digital-to-Analog Converter (DAC) using the same. The DAC includes a plurality of DAC units and one or more divide-add circuit units. The plurality of DAC units performs Digital-Analog (DA) conversion on two or more segmented codes, into which an input digital code is segmented. The one or more divide-add circuit units is configured to be each composed only of capacitors and switches and to generate a final DA conversion output for the entire input digital code based on the voltages of the DAC units. Accordingly, a high resolution of more than ten bits can be implemented.

摘要翻译： 这里公开了一种除法电路和使用其的高分辨率数模转换器（DAC）。 DAC包括多个DAC单元和一个或多个除法电路单元。 多个DAC单元对两个或多个分段代码执行数字模拟（DA）转换，输入数字代码被分段到其中。 一个或多个除法电路单元被配置为仅由电容器和开关组成，并且基于DAC单元的电压产生用于整个输入数字代码的最终DA转换输出。 因此，可以实现超过十位的高分辨率。

公开(公告)号：US20070030192A1

公开(公告)日：2007-02-08

申请号：US11367865

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： H03M1/12

CPC分类号： H03M1/682 ,  G09G3/20 ,  G09G3/2011 ,  G09G2310/027 ,  G09G2310/0272 ,  G09G2310/08 ,  G09G2320/0276

摘要： Disclosed herein are a time division sampling digital to analog converter for a flat panel display, a method of implementing the digital to analog converter, and a data driver circuit using the digital to analog converter. The time division sampling digital to analog converter includes a timing signal generation means for generating timing signals, a data selection means for receiving n-bit digital data, dividing the n-bit digital data into k groups, and outputting the divided digital input data; k reference signal generation means for each outputting 2n/k analog reference signals; a reference signal selection means for receiving the outputs of the reference signal generation means and outputting only 2n/k analog reference signals selected according to a timing signal from the timing signal generation means; a multiplexer for outputting one of reference signals from the reference signal selection means using the n/k-bit digital data from the data selection means as a control input; and a sampling mode analog addition means for sampling and storing the output of the multiplexer according to a timing signal from the timing signal generation means.

摘要翻译： 这里公开了用于平板显示器的时分采样数模转换器，实现数模转换器的方法和使用数模转换器的数据驱动器电路。 时分采样数模转换器包括用于产生定时信号的定时信号产生装置，用于接收n位数字数据的数据选择装置，将n位数字数据分成k组，并输出分割数字输入数据; k个参考信号产生装置，用于每个输出2个/ k个模拟参考信号; 参考信号选择装置，用于接收参考信号产生装置的输出，并且仅输出根据来自定时信号产生装置的定时信号选择的2个/ n / k个模拟参考信号; 多路复用器，用于使用来自数据选择装置的n / k位数字数据作为控制输入，从参考信号选择装置输出参考信号之一; 以及采样模式加法装置，用于根据来自定时信号产生装置的定时信号对多路复用器的输出进行采样和存储。

公开(公告)号：US20060290621A1

公开(公告)日：2006-12-28

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： G09G3/32

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.

公开(公告)号：US20060132053A1

公开(公告)日：2006-06-22

申请号：US11232819

申请日：2005-09-22

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

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

IPC分类号： G09G3/10

CPC分类号： G09G3/3233 ,  G09G3/2014 ,  G09G3/3258 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0259 ,  G09G2310/0297 ,  G09G2310/066 ,  G09G2320/0233

摘要： Disclosed herein are a pixel circuit and driving method for active matrix Organic Light-emitting Diodes (OLEDs), and a display using the same. The pixel circuit includes a Voltage Control Current Source (VCCS), a high gain amplifier, a storage capacitor, and first and second switches. The VCCS is configured to drive OLEDs. The high gain amplifier is configured such that the control input signal of the VCCS causes the VCCS to be placed in an ON or OFF state. The storage capacitor is located between the input terminal of the high gain amplifier and a data line so as to assign the ON-time of the VCCS. The first and second switches are configured to be controlled through a scan line so as to store voltage in the storage capacitor and control the light-emitting time of the OLEDs, and are formed the input terminal of the high gain amplifier and the input terminal of the VCCS, respectively.

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。