公开(公告)号：US20070052644A1

公开(公告)日：2007-03-08

申请号：US10578002

申请日：2004-11-10

申请人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

发明人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

IPC分类号： G09G3/36

CPC分类号： G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0262 ,  G09G2320/043

摘要： A pixel circuit, a display device, and a method of driving a pixel circuit able to obtain a source-follower output without luminance deterioration even when the current-voltage characteristic of a light emitting element changes due to aging, making a source-follower circuit of n-channel transistors possible, and in addition able to display uniform and high quality images not without regard to variations of threshold values and mobilities of the active elements inside pixels, wherein a capacitor C111 is connected between a gate and a source of a TFT 111, the source side of the TFT 111 is connected to a fixed potential (GND) through a TFT 114, a predetermined reference current Iref is supplied to the source of the TFT 111 with a predetermined timing, a voltage corresponding to the reference current Iref is held, and an input signal voltage centered about the voltage is coupled, whereby an EL light emitting element 19 is driven centered about the center value of variation of the mobilities.

摘要翻译： 像素电路，显示装置和驱动像素电路的方法，即使当发光元件的电流 - 电压特性由于老化而变化时，能够获得不依赖于亮度劣化的源极跟随器输出的像素电路，从而使源极跟随器电路 的n沟道晶体管，并且还能够显示均匀和高质量的图像，而不考虑像素内的有源元件的阈值和迁移率的变化，其中电容器C 111连接在栅极和源极之间 TFT111中，TFT111的源极侧通过TFT114连接到固定电位（GND），预定的基准电流Iref以规定的时刻被提供给TFT111的源极，与基准电流对应的电压 Iref被保持，并且以电压为中心的输入信号电压被耦合，由此EL发光元件19被驱动为围绕移动的变化的中心值 关系

公开(公告)号：US20050007357A1

公开(公告)日：2005-01-13

申请号：US10847414

申请日：2004-05-18

申请人： Junichi Yamashita ,  Katsuhide Uchino ,  Tetsuro Yamamoto

发明人： Junichi Yamashita ,  Katsuhide Uchino ,  Tetsuro Yamamoto

IPC分类号： H01L51/50 ,  G09F9/30 ,  G09G3/20 ,  G09G3/30 ,  G09G3/32 ,  G09G3/36 ,  G09G5/00 ,  H05B33/00 ,  H05B33/14

CPC分类号： G09G3/3233 ,  G09G2300/043 ,  G09G2300/0809 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0262 ,  G09G2320/043

摘要： A pixel circuit able to stably and correctly supply a current having a desired value to a light emitting diode of each pixel without being influenced by variation of a threshold value of an active element inside the pixel or variation of mobility and able to display a high quality image as a result of this, wherein a TFT as a fourth switch is turned on together with a TFT as a second switch at the time of an auto-zero operation, a reference current line is connected to a drive transistor of the pixel through a first node, and the variation of the threshold value Vth is corrected, whereby variation of the on current due to the mobility at the time of a white display can be suppressed and the uniformity with respect to variation in the mobility can be greatly enhanced, and a display device and a driving method of the pixel circuit.

摘要翻译： 一种像素电路，其能够稳定且正确地将具有期望值的电流提供给每个像素的发光二极管，而不受像素内部的有源元件的阈值的变化或移动性的变化的影响，并且能够显示高质量 作为其结果的图像，其中在自动归零操作时，作为第四开关的TFT与作为第二开关的TFT一起导通，参考电流线通过a的像素连接到像素的驱动晶体管 第一节点，并且校正阈值Vth的变化，由此可以抑制由于白色显示时的迁移率引起的导通电流的变化，并且可以大大提高关于移动性的变化的均匀性，以及 像素电路的显示装置和驱动方法。

公开(公告)号：US08836678B2

公开(公告)日：2014-09-16

申请号：US13412655

申请日：2012-03-06

申请人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

发明人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

IPC分类号： G09G5/00 ,  G09G3/32

CPC分类号： G09G3/3233 ,  G09G3/30 ,  G09G3/3208 ,  G09G3/3266 ,  G09G2300/0417 ,  G09G2300/0426 ,  G09G2300/043 ,  G09G2300/0439 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0256 ,  G09G2320/043 ,  G09G2330/028

摘要： A pixel circuit able to prevent a spread of the terminal voltages of drive transistors inside a panel and in turn able to reliably prevent deterioration of uniformity, wherein a source of a TFT serving as a drive transistor is connected to an anode of a light emitting element, a drain is connected to a power source potential, a capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT serving as a switch transistor and wherein pixel circuit lines are connected by an upper line and bottom line and are arranged in parallel with pixel circuit power source voltage lines so as not to have intersecting parts.

摘要翻译： 一种像素电路，其能够防止驱动晶体管在面板内部的端子电压的扩展，从而能够可靠地防止均匀性的劣化，其中用作驱动晶体管的TFT的源极连接到发光元件的阳极 漏极连接到电源电位，电容器连接在TFT的栅极和源极之间，TFT的源极电位通过用作开关晶体管的TFT连接到固定电位，并且其中像素电路线 通过上线和底线连接并且与像素电路电源电压线并联布置，以便不具有相交部分。

公开(公告)号：US08339337B2

公开(公告)日：2012-12-25

申请号：US12285870

申请日：2008-10-15

申请人： Junichi Yamashita ,  Tetsuro Yamamoto ,  Katsuhide Uchino

发明人： Junichi Yamashita ,  Tetsuro Yamamoto ,  Katsuhide Uchino

IPC分类号： G09G3/30 ,  G09G3/20 ,  G09G5/00 ,  G09G3/10 ,  G06F3/038

CPC分类号： G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0852

摘要： Disclosed herein is a display apparatus including: a pixel array section including pixel circuits each having an electro optical device, a signal writing transistor, a signal storage capacitor, and a device driving transistor; and a pixel driving section, wherein: in a no-light emission period, the pixel driving section carries out a threshold-voltage correction process by changing an electric potential appearing on an electrode of the device driving transistor close to the electro optical device toward an electric potential obtained by subtracting the threshold voltage of the device driving transistor from the initialization electric potential of the gate electrode of the device driving transistor and a mobility correction process of negatively feeding a current flowing through the device driving transistor back to the gate electrode of the device driving transistor; and when a current is not flowing through the device driving transistor, the pixel driving section applies a positive bias voltage to the gate electrode of the signal writing transistor.

摘要翻译： 这里公开了一种显示装置，包括：像素阵列部分，包括各自具有电光器件，信号写入晶体管，信号存储电容器和器件驱动晶体管的像素电路; 以及像素驱动部，其特征在于，在无光发射期间，像素驱动部通过将靠近电光装置的器件驱动晶体管的电极上出现的电位变更为向 通过从器件驱动晶体管的栅电极的初始化电位减去器件驱动晶体管的阈值电压而获得的电位和将流过器件驱动晶体管的电流反向馈送到器件驱动晶体管的栅电极的迁移率校正处理 器件驱动晶体管; 并且当电流不流过器件驱动晶体管时，像素驱动部分向信号写入晶体管的栅电极施加正偏置电压。

公开(公告)号：US08159479B2

公开(公告)日：2012-04-17

申请号：US11777781

申请日：2007-07-13

申请人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

发明人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

IPC分类号： G09G5/00

CPC分类号： G09G3/3233 ,  G09G3/30 ,  G09G3/3208 ,  G09G3/3266 ,  G09G2300/0417 ,  G09G2300/0426 ,  G09G2300/043 ,  G09G2300/0439 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0256 ,  G09G2320/043 ,  G09G2330/028

摘要： A pixel circuit able to prevent a spread of the terminal voltages of drive transistors inside a panel and in turn able to reliably prevent deterioration of uniformity, wherein a source of a TFT serving as a drive transistor is connected to an anode of a light emitting element, a drain is connected to a power source potential, a capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT serving as a switch transistor and wherein pixel circuit lines are connected by an upper line and bottom line and are arranged in parallel with pixel circuit power source voltage lines so as not to have intersecting parts.

摘要翻译： 一种像素电路，其能够防止驱动晶体管在面板内部的端子电压的扩展，从而能够可靠地防止均匀性的劣化，其中用作驱动晶体管的TFT的源极连接到发光元件的阳极 漏极连接到电源电位，电容器连接在TFT的栅极和源极之间，TFT的源极电位通过用作开关晶体管的TFT连接到固定电位，并且其中像素电路线 通过上线和底线连接并且与像素电路电源电压线并联布置，以便不具有相交部分。

公开(公告)号：US20110242143A1

公开(公告)日：2011-10-06

申请号：US13064340

申请日：2011-03-21

申请人： Junichi Yamashita ,  Hiroshi Hasegawa ,  Kazuo Nakamura ,  Tetsuro Yamamoto ,  Katsuhide Uchino

发明人： Junichi Yamashita ,  Hiroshi Hasegawa ,  Kazuo Nakamura ,  Tetsuro Yamamoto ,  Katsuhide Uchino

IPC分类号： G09G5/10

CPC分类号： G09G3/3233 ,  G09G3/3291 ,  G09G2300/0819 ,  G09G2300/0866 ,  G09G2320/029 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2360/145

摘要： Disclosed herein is a signal processing apparatus, including: a luminance degradation information production section adapted to produce luminance degradation information regarding degradation of a luminance in accordance with a temperature condition upon emission; a luminance degradation value calculation section adapted to calculate a luminance degradation value regarding degradation of the luminance for each pixel circuit; and a correction section adapted to correct the gradation value of an image signal to be inputted to the pixel circuit based on the luminance degradation value.

摘要翻译： 这里公开了一种信号处理装置，包括：亮度劣化信息生成部，适于根据发光时的温度条件，生成亮度劣化信息; 亮度劣化值计算部分，用于计算关于每个像素电路的亮度劣化的亮度劣化值; 以及校正部，其适于基于亮度劣化值来校正要输入到像素电路的图像信号的灰度值。

公开(公告)号：US08022903B2

公开(公告)日：2011-09-20

申请号：US12139017

申请日：2008-06-13

申请人： Tetsuro Yamamoto ,  Katsuhide Uchino ,  Junichi Yamashita

发明人： Tetsuro Yamamoto ,  Katsuhide Uchino ,  Junichi Yamashita

IPC分类号： G09G3/30 ,  G09G3/32

CPC分类号： G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2300/0866 ,  G09G2310/0256 ,  G09G2320/0233 ,  G09G2320/0238 ,  G09G2320/043 ,  H01L27/3262

摘要： In the present invention, there is provided an organic electro luminescence device including: an organic electro luminescence light emitting element; and a driving circuit for driving the organic electro luminescence light emitting element, wherein the driving circuit includes (A) an element driving transistor, (B) a video-signal write transistor, and (C) a capacitor having a pair of particular and other electrodes, with regard to the element driving transistor, (A-1) a source/drain area provided on a particular side of the element driving transistor to serve as a particular source/drain area of the element driving transistor is connected to a current supply section, and (A-2) a source/drain area provided on the other side of the element driving transistor to serve as another source/drain area of the element driving transistor is connected to the anode electrode of the organic electro luminescence light emitting element and the particular electrode of the capacitor, forming a second node.

摘要翻译： 在本发明中，提供了一种有机电致发光器件，包括：有机电致发光元件; 以及用于驱动有机电致发光元件的驱动电路，其中驱动电路包括（A）元件驱动晶体管，（B）视频信号写入晶体管，以及（C）具有一对特定等的电容器 电极相对于元件驱动晶体管（A-1），设置在元件驱动晶体管的特定侧的源极/漏极区域用作元件驱动晶体管的特定源极/漏极区域连接到电流源 以及（A-2）在元件驱动晶体管的另一侧设置用作元件驱动晶体管的另一个源极/漏极区域的源极/漏极区域连接到有机电致发光元件的阳极电极 和电容器的特定电极，形成第二节点。

公开(公告)号：US07847761B2

公开(公告)日：2010-12-07

申请号：US11549174

申请日：2006-10-13

申请人： Tetsuro Yamamoto ,  Katsuhide Uchino ,  Junichi Yamashita

发明人： Tetsuro Yamamoto ,  Katsuhide Uchino ,  Junichi Yamashita

IPC分类号： G09G3/30

CPC分类号： G09G3/3233 ,  G09G3/3291 ,  G09G2300/043 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/0262 ,  G09G2320/043 ,  G09G2320/045

摘要： In an embodiment of the present invention, for an active-matrix organic EL display in which pixel circuits each including five transistors and one capacitor are two-dimensionally arranged in rows and columns, the timing of transition of a drive signal DS from the “H” level to the “L” level is brought close to the timing of transition of a write signal WS from the “L” level to the “H” level. Furthermore, the active period of a first auto-zero signal AZ1 is overlapped with the active period of the write signal WS. This timing relationship achieves suppression of variation in the source voltage and gate voltage of a drive transistor due to leakage currents, in addition to realization of a function to compensate variation in the characteristic of an organic EL element and a function to compensate variation in the threshold voltage Vth of the drive transistor with a small number of components. Thus, a uniform image quality free from image unevenness can be achieved.

摘要翻译： 在本发明的一个实施例中，对于其中分别包括五个晶体管和一个电容器的像素电路以行和列二维排列的有源矩阵有机EL显示器，驱动信号DS从“H” “电平到”L“电平接近写入信号WS从”L“电平转换到”H“电平的定时。 此外，第一自动归零信号AZ1的有效周期与写入信号WS的有效周期重叠。 该定时关系除了实现补偿有机EL元件的特性的变化的功能以及补偿阈值的变化的功能之外，还实现了由于漏电流而导致的驱动晶体管的源极电压和栅极电压的变化的抑制 具有少量元件的驱动晶体管的电压Vth。 因此，可以获得没有图像不均匀的均匀图像质量。

公开(公告)号：US20070132694A1

公开(公告)日：2007-06-14

申请号：US11702165

申请日：2007-02-05

申请人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

发明人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

IPC分类号： G09G3/36

CPC分类号： G09G3/3258 ,  G09G3/20 ,  G09G3/2011 ,  G09G3/30 ,  G09G3/3233 ,  G09G3/3266 ,  G09G3/3291 ,  G09G2300/0417 ,  G09G2300/0809 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0216 ,  G09G2310/0256 ,  G09G2310/0267 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2320/0626 ,  G09G2320/0633 ,  G09G2330/021

摘要： A pixel circuit having a function of compensating for characteristic variation of an electro-optical element and threshold voltage variation of a transistor is formed from a reduced number of component elements. The pixel circuit includes an electro-optical element, a holding capacitor, a sampling transistor, and a drive transistor. The sampling transistor samples and supplies an input signal from a signal line so as to be held into the holding capacitor. The driving transistor drives the electro-optical element with current in response to the held signal potential. The threshold voltage of the drive transistor is imparted to the holding capacitor in order to cancel an influence of the threshold voltage.

摘要翻译： 具有补偿电光元件的特性变化和晶体管的阈值电压变化的功能的像素电路由减少数量的元件元件形成。 像素电路包括电光元件，保持电容器，采样晶体管和驱动晶体管。 采样晶体管对来自信号线的输入信号进行采样并将其保持在保持电容器中。 驱动晶体管响应于保持的信号电位而以电流驱动电光元件。 为了消除阈值电压的影响，驱动晶体管的阈值电压被施加到保持电容器。

公开(公告)号：US20070120795A1

公开(公告)日：2007-05-31

申请号：US10558372

申请日：2004-06-03

申请人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

发明人： Katsuhide Uchino ,  Junichi Yamashita ,  Tetsuro Yamamoto

IPC分类号： G09G3/36

CPC分类号： G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0256 ,  G09G2320/043

摘要： A pixel circuit, display device, and method of driving a pixel circuit enabling source-follower output with no deterioration of luminance even with a change of the current-voltage characteristic of the light emitting element along with elapse, enabling a source-follower circuit of n-channel transistors, and able to use an n-channel transistor as a drive transistor of a light emitting element while using current anode-cathode electrodes, wherein a capacitor C111 is connected between a gate and source of a TFT 111 as a drive transistor, a source side of the TFT 111 is connected to a fixed potential (for example GND) through the TFT 114, the gate and drain of the TFT 111 are connected through the TFT 113 to cancel the threshold value Vth, the threshold value Vth is charged in the capacitor C111, and the input voltage Vin is coupled with the gate of the TFT 111 from the threshold voltage Vth.

摘要翻译： 一种像素电路，显示装置和驱动像素电路的方法，即使随着发光元件的电流 - 电压特性的改变，也能够随着亮度的降低而使源极跟随器输出不发生劣化，从而能够使源极跟随器电路 n沟道晶体管，并且能够使用n沟道晶体管作为发光元件的驱动晶体管，同时使用电流阳极 - 阴极电极，其中电容器C 111连接在TFT 111的栅极和源极之间作为驱动 晶体管，TFT111的源极侧通过TFT114连接到固定电位（例如GND），TFT111的栅极和漏极通过TFT 113连接以抵消阈值Vth，阈值Vth 在电容器C 111中充电，并且输入电压Vin从阈值电压Vth与TFT111的栅极耦合。