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公开(公告)号：KR100966261B1
公开(公告)日：2010-06-28
申请号：KR1020080063563
申请日：2008-07-01
Applicant: 한국과학기술원
Abstract: 본 발명은 유기발광표시장치의 데이터 구동회로에 관한 것이다. 보다 구체적으로는 액티브 매트릭스 유기발광소자를 포함한 화소회로를 전류구동방식으로 구동하는 데이터 구동회로에 관한 것이다.
본 발명에 따른 유기발광장치의 데이터 구동회로는 전류 DAC, 제1 피드백 구동부, 제2 피드백 구동부 및 루프 보상부를 포함한다.
본 발명에 따른 유기발광표시장치의 데이터 구동회로는 주극점 보상을 통해 피드백 루프의 안정도를 확보하고, 영점삽입을 통해 디스플레이 패널이 대형화됨에 따라 증가하는 기생성분으로 인한 극점을 상쇄하여 피드백 루프의 충분한 대역폭 및 고속의 구동속도를 확보할 수 있다.
유기발광표시장치, 피드백 구동회로, 기생 커패시턴스, 주극점 보상, 영점삽입-
公开(公告)号：KR100872352B1
公开(公告)日：2008-12-09
申请号：KR1020060118353
申请日：2006-11-28
Applicant: 한국과학기술원
CPC classification number: G09G3/3283 , G09G3/3233 , G09G2300/0809 , G09G2310/0262 , G09G2320/029 , G09G2320/043 , G09G2320/045
Abstract: 본 발명은 유기발광표시장치 등에 관한 것이다.
이러한 본 발명에 따른 유기발광표시장치는 기준픽셀의 발광량에 따른 제1 제어신호를 출력하는 광검출부와, 제1 제어신호에 따라 기준픽셀로 입력되는 기준전류의 크기를 제어하는 제2 제어신호를 출력하는 기준전류 제어부를 포함하는 기준픽셀 제어부와, 제2 제어신호에 따라 기준전류와 동일한 크기의 전류를 출력하는 전류소오스부와, 기준전류와 동일한 크기의 전류를 데이터신호에 비례하도록 스케일링하여 데이터전류를 출력하는 디지털아날로그변환기를 포함하는 데이터 구동부 및 데이터전류에 따라 발광하는 유기발광소자를 포함하는 픽셀들로 이루어진 디스플레이 패널을 포함한다.
이러한 본 발명에 따르면, OLED의 열화에 따른 밝기감소를 보상하여 유기발광표시장치의 화질이 향상되는 등의 효과가 있다.
유기발광소자, 유기발광표시장치, 광검출부, 기준전류 제어부, 열화-
公开(公告)号：KR100813097B1
公开(公告)日：2008-03-17
申请号：KR1020060111583
申请日：2006-11-13
Applicant: 한국과학기술원
CPC classification number: Y02B20/345 , G09G3/3241 , G09G2300/0819 , G09G2300/0828 , G09G2300/0876 , G09G2320/0233 , H03F3/45071
Abstract: A pixel circuit, a data driving circuit and an organic light emitting display device having the data driver are provided to increase an operational margin of the OLED by compensating for a degradation of a stability of a feedback loop due to a parasitic capacitance and a parasitic resistance. A data driver for an OLED(Organic Light Emitting Device) includes a current DAC(610) and first and second amplifiers(620,630). The current DAC(Digital to Analog Converter) outputs a data current according to input data. The first amplifier is electrically connected to a pixel circuit through a data line and controls the data current, so that the data current is equalized with a current pixel current which is fed back from the pixel circuit through a feedback line. The second amplifier is electrically connected to the pixel circuit through the feedback line and maintains a constant voltage on the feedback line. The second amplifier delivers the pixel current to the first amplifier.
Abstract translation: 提供具有数据驱动器的像素电路，数据驱动电路和有机发光显示装置，以通过补偿由寄生电容和寄生电阻引起的反馈回路的稳定性的劣化来增加OLED的操作裕度 。 用于OLED（有机发光器件）的数据驱动器包括电流DAC（610）和第一和第二放大器（620,630）。 当前DAC（数模转换器）根据输入数据输出数据电流。 第一放大器通过数据线电连接到像素电路并控制数据电流，使得数据电流与通过反馈线从像素电路反馈的当前像素电流相等。 第二放大器通过反馈线电连接到像素电路，并在反馈线上保持恒定的电压。 第二放大器将像素电流传递给第一放大器。
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公开(公告)号：KR1020080004807A
公开(公告)日：2008-01-10
申请号：KR1020060063579
申请日：2006-07-06
Applicant: 한국과학기술원
IPC: H03M1/66
CPC classification number: H03M1/66 , H03M2201/61 , H03M2201/62 , H03M2201/81
Abstract: A current supply circuit and a digital analog converter provided with the same are provided to prevent the distortion of an output current caused by changes or ununiformity in a semiconductor process. A current supply circuit includes a corrector(310) and a current source unit(320). The corrector(310) includes a reference current source(ISRC1) and a reference current generator(3010). The reference current generator receives the reference current source to generate reference current. The current source part includes a first switch(SW1), a correction current generator(3020), a second switch(SW2), and a buffer(3000). The first switch is electrically connected with one of the reference current source and an output terminal. The correction current generator generates corrected current in accordance with the reference current generator. The second switch electrically connects the reference current generator and the correction current generator. The buffer is electrically connected between the first switch and the correction current generator.
Abstract translation: 提供电流供给电路和设置有电流供给电路的数字模拟转换器，以防止由半导体工艺中的变化或不均匀性引起的输出电流的失真。 电流源电路包括校正器（310）和电流源单元（320）。 校正器（310）包括参考电流源（ISRC1）和参考电流发生器（3010）。 参考电流发生器接收参考电流源以产生参考电流。 电流源部分包括第一开关（SW1），校正电流发生器（3020），第二开关（SW2）和缓冲器（3000）。 第一开关与参考电流源和输出端之一电连接。 校正电流发生器根据参考电流发生器产生校正电流。 第二开关电连接参考电流发生器和校正电流发生器。 缓冲器电连接在第一开关和校正电流发生器之间。
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公开(公告)号：KR1020080048230A
公开(公告)日：2008-06-02
申请号：KR1020060118353
申请日：2006-11-28
Applicant: 한국과학기술원
CPC classification number: G09G3/3283 , G09G3/3233 , G09G2300/0809 , G09G2310/0262 , G09G2320/029 , G09G2320/043 , G09G2320/045
Abstract: A data driving circuit and an OLED(Organic Light Emitting Display) device including the same are provided to enhance image quality by compensating for the lightness decrease of lights due to the deterioration of the OLED device. An OLED(Organic Light Emitting Display) device includes a reference pixel controller(11), a data driver(20), and a display panel(30). The reference pixel controller includes a beam detecting unit(111) and a reference current controller(112). The beam detecting unit detects luminescence intensity of a reference pixel and outputs a first control signal according to the luminescence intensity. The reference current controller outputs a second control signal for controlling the magnitude of reference current inputted to the reference pixel according to the first control signal. The data driver includes a current source unit(201) and a digital to analog converter(202). The current source unit outputs current with the same magnitude as the reference current according to the second control signal. The digital to analog converter outputs data currents by scaling current with the same magnitude as the reference current. The display panel includes pixels having organic light emitting elements radiated by the data currents.
Abstract translation: 提供包括该数据驱动电路和OLED（有机发光显示器）的OLED（有机发光显示器件）以通过补偿由于OLED器件劣化引起的光的亮度降低而提高图像质量。 OLED（有机发光显示器）装置包括参考像素控制器（11），数据驱动器（20）和显示面板（30）。 参考像素控制器包括光束检测单元（111）和参考电流控制器（112）。 光束检测单元检测参考像素的发光强度，并根据发光强度输出第一控制信号。 参考电流控制器输出用于根据第一控制信号控制输入到参考像素的参考电流的大小的第二控制信号。 数据驱动器包括电流源单元（201）和数模转换器（202）。 电流源单元根据第二控制信号输出与参考电流相同幅度的电流。 数模转换器通过以与参考电流相同的大小来缩放电流来输出数据电流。 显示面板包括具有由数据电流辐射的有机发光元件的像素。
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Patent Agency Ranking
公开(公告)号：KR100792708B1
公开(公告)日：2008-01-11
申请号：KR1020060053342
申请日：2006-06-14
Applicant: 한국과학기술원
IPC: H03M1/66
CPC classification number: H03M1/745
Abstract: 본 발명은 디지털 아날로그 변환기에 관한 것으로, 보다 상세하게는 해상도 특성이 우수하고, 작은 칩 면적 상에 구현할 수 있는 디지털 아날로그 변환기에 관한 것이다.
이러한 본 발명의 디지털 아날로그 변환기는 전류공급부와, 전류공급부로부터 공급되는 전류를 분배하는 전류분배부와, 입력신호에 따라 반전신호와 비반전신호를 출력하는 인버터부와, 반전신호와 비반전신호에 따라 전류분배부에 의해 분배된 전류의 흐름을 제어하는 스위칭부 및 비반전신호에 따른 분배전류들을 합하여 아날로그 신호를 출력하는 전류출력부를 포함한다.
이러한 본 발명에 따르면, 해상도 특성이 우수하고, 작은 칩 면적 상에 구현할 수 있는 디지털 아날로그 변환기를 구현할 수 있는 등의 효과가 있다.
디지털 아날로그 변환기, 전류분배부, 인버터부, 스위칭부, 임피던스버퍼부-
公开(公告)号：KR1020070119139A
公开(公告)日：2007-12-20
申请号：KR1020060053342
申请日：2006-06-14
Applicant: 한국과학기술원
IPC: H03M1/66
CPC classification number: H03M1/745
Abstract: A digital to analog converter is provided to reduce the number of current sources to one and simplifying a digital circuit for controlling the current source to be placed on a small-sized semiconductor chip. A digital to analog converter includes a current supplying unit(31), a current distributing unit(32), an inverter unit(36), a switching unit(35), and a current outputting unit(37). The current distributing unit distributes current supplied from the current supplying unit. The inverter unit outputs a reverse signal and a non-reverse signal according to an input signal. The switching unit controls the flow of current distributed by the current distributing unit according to the reverse signal and the non-reverse signal. The current outputting unit sums the distribution current according to the non-reverse signal and outputs an analog signal.
Abstract translation: 提供了数模转换器以将电流源的数量减少到一个，并且简化数字电路以控制将电流源放置在小尺寸半导体芯片上。 数模转换器包括电流供给单元（31），电流分配单元（32），逆变单元（36），切换单元（35）和电流输出单元（37）。 电流分配单元分配从电流供应单元提供的电流。 逆变器单元根据输入信号输出反向信号和非反向信号。 开关单元根据反向信号和非反向信号来控制由电流分配单元分配的电流的流动。 电流输出单元根据非反向信号求和分配电流，并输出模拟信号。
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公开(公告)号：KR1020100042329A
公开(公告)日：2010-04-26
申请号：KR1020080101424
申请日：2008-10-16
Applicant: 한국과학기술원
CPC classification number: G09G3/325 , G09G3/3283 , G09G2300/0842 , G09G2310/027 , G09G2320/0223 , G09G2320/0295 , H01L2924/13091 , H01L2924/14253
Abstract: PURPOSE: A display driving apparatus is provided to minimize power consumption, chip area, and driving delay and to eliminate the under-damping phenomenon of a driving current. CONSTITUTION: A display driving apparatus comprising: a current digital/analog converter(800) generating a data current corresponding to an input of digital data; 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(810) feed backing 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(820) connected to the current mirror and comprising 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 digital/analog converter; and a first constant current source discharging parasitic capacitance excessively charged in the data line and the adjacent data line.
Abstract translation: 目的：提供显示驱动装置以最小化功耗，芯片面积和驱动延迟，并消除驱动电流的欠阻尼现象。 构成：显示驱动装置，包括：当前的数字/模拟转换器（800），产生与数字数据的输入相对应的数据电流; 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; 电流反射镜（810）馈送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; 电流输出单元（820），连接到电流镜，并且包括用于驱动数据线的第一驱动晶体管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，根据当前数字/模拟转换器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。
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公开(公告)号：KR1020100003591A
公开(公告)日：2010-01-11
申请号：KR1020080063563
申请日：2008-07-01
Applicant: 한국과학기술원
CPC classification number: G09G3/2011 , G01B1/00 , G09G3/3208 , H01L2227/32
Abstract: PURPOSE: A data driving circuit of an organic light emitting display is provided to improve the stability and secure enough bandwidth and high-speed driving of the feedback loop through main zenith compensation or zero point insertion. CONSTITUTION: A first feedback driver(530) controls the pixel current fed back through a feedback line from a pixel circuit to identical to data current. A second feedback driver(520) keeps the voltage of the feedback line constant and transmits the pixel current to the first feedback driver. A loop compensator(540) secures the stable operation of the feedback loop through main zenith compensation or zero point insertion.
Abstract translation: 目的：提供有机发光显示器的数据驱动电路，以通过主天顶补偿或零点插入来提高稳定性并确保反馈回路的足够的带宽和高速驱动。 构成：第一反馈驱动器（530）控制通过反馈线从像素电路反馈到与数据电流相同的像素电流。 第二反馈驱动器（520）保持反馈线的电压恒定并将像素电流传输到第一反馈驱动器。 环路补偿器（540）通过主天顶补偿或零点插入来确保反馈回路的稳定运行。
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公开(公告)号：KR1020090020030A
公开(公告)日：2009-02-26
申请号：KR1020070084417
申请日：2007-08-22
Applicant: 한국과학기술원
CPC classification number: H03M1/682 , G09G3/20 , G09G2310/027 , G09G2320/0276 , G09G2330/028 , H03M1/765
Abstract: An apparatus for driving display is provided to improve the accuracy of output, to reduce the number of device used for the device implementation and to reduce the whole area by simplifying the circuit structure of the output unit. The apparatus for driving display driving comprises a reference voltage generation part(600), a digital to analog converter(610) and an output unit(620). The reference voltage generation part generates a plurality of reference voltages, receives the difference between two adjacent reference voltages among the reference voltages and generates auxiliary reference voltages. The digital to analog converter selects one of reference voltages and outputs the first analog signal according to the high position N bit data signal among data signal of M bit. The digital to analog converter selects one of supplementary reference voltages and outputs the second analog signal according to the low rank(M-N) bit data signal among data signal of M bit. The output unit adds/subtracts the second analog signal in the first analog signal.
Abstract translation: 提供用于驱动显示的装置以提高输出的精度，减少用于设备实现的设备的数量，并且通过简化输出单元的电路结构来减小整个面积。 用于驱动显示驱动的装置包括参考电压产生部分（600），数模转换器（610）和输出单元（620）。 参考电压产生部分产生多个参考电压，接收参考电压之间的两个相邻参考电压之间的差，并产生辅助参考电压。 数模转换器选择参考电压之一，并根据M位数据信号中的高位N位数据信号输出第一模拟信号。 数模转换器选择补充参考电压之一，并根据M位数据信号中的低位（M-N）位数据信号输出第二模拟信号。 输出单元在第一模拟信号中加/减第二模拟信号。
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