-
公开(公告)号：US20090295422A1
公开(公告)日：2009-12-03
申请号：US12128697
申请日：2008-05-29
IPC分类号： G01R31/26
CPC分类号： G09G3/3233 , G09G3/2003 , G09G2300/0426 , G09G2300/0443 , G09G2300/0452 , G09G2300/0465 , G09G2300/0842 , G09G2320/029 , G09G2320/0295 , G09G2320/043 , G09G2320/045 , G09G2320/046
摘要： A method of compensating for changes in the characteristics of transistors and electroluminescent devices in an electroluminescent display, includes: providing an electroluminescent display having a two-dimensional array of subpixels arranged forming each pixel having at least three subpixels of different colors, with each having an electroluminescent device and a drive transistor, wherein each electroluminescent device is driven by the corresponding drive transistor; providing in each pixel a readout circuit for one of the subpixels of a specific color having a first readout transistor and a second readout transistor connected in series; using the readout circuit to derive a correction signal based on the characteristics of at least one of the transistors in the specific color subpixel, or the electroluminescent device in the specific color subpixel, or both; and using the correction signal to adjust the drive signals.
摘要翻译： 一种补偿电致发光显示器中的晶体管和电致发光器件的特性变化的方法包括：提供具有二维阵列阵列的电致发光显示器，所述子像素布置成每个具有至少三个不同颜色的子像素的像素，每个具有不同颜色的子像素 电致发光器件和驱动晶体管，其中每个电致发光器件由相应的驱动晶体管驱动; 在每个像素中提供具有串联连接的第一读出晶体管和第二读出晶体管的特定颜色的子像素之一的读出电路; 使用读出电路基于特定颜色子像素中的至少一个晶体管或特定颜色子像素中的电致发光器件或两者的特性导出校正信号; 并使用校正信号调整驱动信号。
-
公开(公告)号：US08217867B2
公开(公告)日：2012-07-10
申请号：US12128697
申请日：2008-05-29
IPC分类号： G01R31/26
CPC分类号： G09G3/3233 , G09G3/2003 , G09G2300/0426 , G09G2300/0443 , G09G2300/0452 , G09G2300/0465 , G09G2300/0842 , G09G2320/029 , G09G2320/0295 , G09G2320/043 , G09G2320/045 , G09G2320/046
摘要： A method of compensating for changes in the characteristics of transistors and electroluminescent devices in an electroluminescent display, includes: providing an electroluminescent display having a two-dimensional array of subpixels arranged forming each pixel having at least three subpixels of different colors, with each having an electroluminescent device and a drive transistor, wherein each electroluminescent device is driven by the corresponding drive transistor; providing in each pixel a readout circuit for one of the subpixels of a specific color having a first readout transistor and a second readout transistor connected in series; using the readout circuit to derive a correction signal based on the characteristics of at least one of the transistors in the specific color subpixel, or the electroluminescent device in the specific color subpixel, or both; and using the correction signal to adjust the drive signals.
摘要翻译： 一种补偿电致发光显示器中的晶体管和电致发光器件的特性变化的方法包括：提供具有二维阵列阵列的电致发光显示器，所述子像素布置成每个具有至少三个不同颜色的子像素的像素，每个具有不同颜色的子像素 电致发光器件和驱动晶体管，其中每个电致发光器件由相应的驱动晶体管驱动; 在每个像素中提供具有串联连接的第一读出晶体管和第二读出晶体管的特定颜色的子像素之一的读出电路; 使用读出电路基于特定颜色子像素中的至少一个晶体管或特定颜色子像素中的电致发光器件或两者的特性导出校正信号; 并使用校正信号调整驱动信号。
-
公开(公告)号：US08358256B2
公开(公告)日：2013-01-22
申请号：US12272222
申请日：2008-11-17
申请人： John W. Hamer , Gary Parrett , Charles I. Levey
发明人： John W. Hamer , Gary Parrett , Charles I. Levey
IPC分类号： G09G3/30
CPC分类号： G09G3/3225 , G09G2320/0295 , G09G2320/043 , G09G2320/045
摘要： Compensation is performed for initial nonuniformity or aging of drive transistors and electroluminescent (EL) emitters in 3T1C EL subpixels of an EL display, such as an organic light-emitting diode (OLED) display. A readout transistor connected to the EL emitter is used to readout the voltage of the emitter and compensation for ΔVth, ΔVEL, and OLED efficiency loss is performed using a model. Measurements are taken during a frame by driving a target subpixel at a higher luminance for a shorter time, then using the remaining time in the frame to measure. Measurements can be taken with an A/D converter or with a ramp generator and comparator. Compensation is performed for each subpixel individually.
摘要翻译： 对于诸如有机发光二极管（OLED）显示器的EL显示器的3T1C EL子像素中的驱动晶体管和电致发光（EL）发射体的初始不均匀性或老化，进行补偿。 连接到EL发射器的读出晶体管用于读出发射极的电压，并且使用模型进行补偿以达到＆Dgr; Vth，＆Dgr，VEL和OLED效率损失。 通过在更短的时间内以更高的亮度驱动目标子像素，然后使用帧中的剩余时间来测量，在帧期间进行测量。 可以用A / D转换器或斜坡发生器和比较器进行测量。 对每个子像素分别执行补偿。
-
公开(公告)号：US20100225630A1
公开(公告)日：2010-09-09
申请号：US12396662
申请日：2009-03-03
申请人： Charles I. Levey , John W. Hamer
发明人： Charles I. Levey , John W. Hamer
CPC分类号： G09G3/3233 , G09G2300/0842 , G09G2320/0233 , G09G2320/029 , G09G2320/0295 , G09G2320/043 , G09G2320/045 , G09G2360/16
摘要： An electroluminescent (EL) subpixel, such as an organic light-emitting diode (OLED) subpixel, is compensated for aging effects such as threshold voltage Vth shift, EL voltage Voled shift, and OLED efficiency loss. The drive current of the subpixel is measured at one or more measurement reference gate voltages to form a status signal representing the characteristics of the drive transistor and EL emitter of the subpixel. Current measurements are taken in the linear region of drive transistor operation to improve signal-to-noise ratio in systems such as modern LTPS PMOS OLED displays, which have relatively small Voled shift over their lifetimes and thus relatively small current change due to channel-length modulation. Various sources of noise are also suppressed to further increase signal-to-noise ratio.
摘要翻译： 诸如有机发光二极管（OLED）子像素的电致发光（EL）子像素被补偿诸如阈值电压Vth偏移，EL电压Volle偏移和OLED效率损失的老化效应。 在一个或多个测量参考栅极电压处测量子像素的驱动电流，以形成表示子像素的驱动晶体管和EL发射极的特性的状态信号。 在驱动晶体管操作的线性区域中进行电流测量，以提高诸如现代LTPS PMOS OLED显示器的系统中的信噪比，其在其寿命期间具有相对小的Volle移位，并且因此由于通道长度而导致相对较小的电流变化 调制。 还抑制了各种噪声源，以进一步提高信噪比。
-
公开(公告)号：US08217928B2
公开(公告)日：2012-07-10
申请号：US12396662
申请日：2009-03-03
申请人： Charles I. Levey , John W. Hamer
发明人： Charles I. Levey , John W. Hamer
IPC分类号： G06F3/038
CPC分类号： G09G3/3233 , G09G2300/0842 , G09G2320/0233 , G09G2320/029 , G09G2320/0295 , G09G2320/043 , G09G2320/045 , G09G2360/16
摘要： An electroluminescent (EL) subpixel, such as an organic light-emitting diode (OLED) subpixel, is compensated for aging effects such as threshold voltage Vth shift, EL voltage Voled shift, and OLED efficiency loss. The drive current of the subpixel is measured at one or more measurement reference gate voltages to form a status signal representing the characteristics of the drive transistor and EL emitter of the subpixel. Current measurements are taken in the linear region of drive transistor operation to improve signal-to-noise ratio in systems such as modern LTPS PMOS OLED displays, which have relatively small Voled shift over their lifetimes and thus relatively small current change due to channel-length modulation. Various sources of noise are also suppressed to further increase signal-to-noise ratio.
摘要翻译： 诸如有机发光二极管（OLED）子像素的电致发光（EL）子像素被补偿诸如阈值电压Vth偏移，EL电压Volle偏移和OLED效率损失的老化效应。 在一个或多个测量参考栅极电压处测量子像素的驱动电流，以形成表示子像素的驱动晶体管和EL发射极的特性的状态信号。 在驱动晶体管操作的线性区域中进行电流测量，以提高诸如现代LTPS PMOS OLED显示器的系统中的信噪比，其在其寿命期间具有相对小的Volle移位，并且因此由于通道长度而导致相对较小的电流变化 调制。 还抑制了各种噪声源，以进一步提高信噪比。
-
公开(公告)号：US20100225634A1
公开(公告)日：2010-09-09
申请号：US12397526
申请日：2009-03-04
申请人： Charles I. Levey , John W. Hamer
发明人： Charles I. Levey , John W. Hamer
IPC分类号： G09G5/00
CPC分类号： G09G3/3208 , G09G2320/0233 , G09G2320/0285 , G09G2320/029 , G09G2320/043 , G09G2320/045 , G09G2320/0693 , G09G2340/10 , G09G2360/16
摘要： Subpixels on an electroluminescent (EL) display panel, such as an organic light-emitting diode (OLED) panel, are compensated for initial nonuniformity (“mura”) and for aging effects such as threshold voltage Vth shift, EL voltage Voled shift, and OLED efficiency loss. The drive current of each subpixel is measured at one or more measurement reference gate voltages to form status signals representing the characteristics of the drive transistor and EL emitter of those subpixels. Current measurements are taken in the linear region of drive transistor operation to improve signal-to-noise ratio in systems such as modern LTPS PMOS OLED displays, which have relatively small Voled shift over their lifetimes and thus relatively small current change due to channel-length modulation. Various sources of noise are also suppressed to further increase signal-to-noise ratio.
摘要翻译： 在诸如有机发光二极管（OLED）面板的电致发光（EL）显示面板上的子像素被补偿初始不均匀性（“mura”）和用于老化效应，例如阈值电压Vth偏移，EL电压Volle偏移和 OLED效率损失。 在一个或多个测量参考栅极电压处测量每个子像素的驱动电流，以形成表示这些子像素的驱动晶体管和EL发射极的特性的状态信号。 在驱动晶体管操作的线性区域中进行电流测量，以提高诸如现代LTPS PMOS OLED显示器的系统中的信噪比，其在其寿命期间具有相对小的Volle移位，并且因此由于通道长度而导致相对较小的电流变化 调制。 还抑制了各种噪声源，以进一步提高信噪比。
-
公开(公告)号：US08194063B2
公开(公告)日：2012-06-05
申请号：US12397526
申请日：2009-03-04
申请人： Charles I. Levey , John W. Hamer
发明人： Charles I. Levey , John W. Hamer
IPC分类号： G06F3/038
CPC分类号： G09G3/3208 , G09G2320/0233 , G09G2320/0285 , G09G2320/029 , G09G2320/043 , G09G2320/045 , G09G2320/0693 , G09G2340/10 , G09G2360/16
摘要： Subpixels on an electroluminescent (EL) display panel, such as an organic light-emitting diode (OLED) panel, are compensated for initial nonuniformity (“mura”) and for aging effects such as threshold voltage Vth shift, EL voltage Voled shift, and OLED efficiency loss. The drive current of each subpixel is measured at one or more measurement reference gate voltages to form status signals representing the characteristics of the drive transistor and EL emitter of those subpixels. Current measurements are taken in the linear region of drive transistor operation to improve signal-to-noise ratio in systems such as modern LTPS PMOS OLED displays, which have relatively small Voled shift over their lifetimes and thus relatively small current change due to channel-length modulation. Various sources of noise are also suppressed to further increase signal-to-noise ratio.
摘要翻译： 在诸如有机发光二极管（OLED）面板的电致发光（EL）显示面板上的子像素被补偿初始不均匀性（“mura”）和用于老化效应，例如阈值电压Vth偏移，EL电压Volle偏移和 OLED效率损失。 在一个或多个测量参考栅极电压处测量每个子像素的驱动电流，以形成表示这些子像素的驱动晶体管和EL发射极的特性的状态信号。 在驱动晶体管操作的线性区域中进行电流测量，以提高诸如现代LTPS PMOS OLED显示器的系统中的信噪比，其在其寿命期间具有相对小的Volle移位，并且因此由于通道长度而导致相对较小的电流变化 调制。 还抑制了各种噪声源，以进一步提高信噪比。
-
公开(公告)号：US08130182B2
公开(公告)日：2012-03-06
申请号：US12337668
申请日：2008-12-18
IPC分类号： G09G3/30
CPC分类号： G09G3/3233 , G09G3/2022 , G09G2300/0819 , G09G2320/0295 , G09G2320/041 , G09G2320/043 , G09G2320/045
摘要： An electroluminescent (EL) subpixel driven by a digital-drive scheme has a readout transistor driven by a current source when the drive transistor is non-conducting. This produces an emitter-voltage signal from which an aging signal representing the efficiency of the EL emitter can be computed. The aging signal is used to determine the loss in current of the subpixel when active, and an input signal is adjusted to provide increased on-time to compensate for voltage rise and efficiency loss of the EL emitter. Variations due to temperature can also be compensated for.
摘要翻译： 由数字驱动方案驱动的电致发光（EL）子像素在驱动晶体管不导通时具有由电流源驱动的读出晶体管。 这产生一个发射极 - 电压信号，由此可以计算代表EL发射器效率的老化信号。 老化信号用于确定有源时子像素的电流损耗，并调整输入信号以提供增加的导通时间，以补偿EL发射极的电压上升和效率损失。 温度变化也可以补偿。
-
公开(公告)号：US20080122760A1
公开(公告)日：2008-05-29
申请号：US11869834
申请日：2007-10-10
申请人： Charles I. Levey , John W. Hamer
发明人： Charles I. Levey , John W. Hamer
IPC分类号： G09G3/30
CPC分类号： G09G3/3233 , G09G3/006 , G09G2300/0842 , G09G2320/0295 , G09G2320/043
摘要： A method of compensating for changes in the threshold voltage of the drive transistor of an OLED drive circuit, comprising: providing the drive transistor with a first electrode, second electrode, and gate electrode; connecting a first voltage source to the first electrode, and an OLED device to the second electrode and to a second voltage source; providing a test voltage to the gate electrode of the drive transistor and connecting to the OLED drive circuit a test circuit that includes an adjustable current mirror that causes the voltage applied to the current mirror to be at a first test level; providing a test voltage to the gate electrode of the drive transistor and connecting the test circuit to the OLED device to produce a second test level after the drive transistor and the OLED device have aged; and using the first and second test levels to calculate a change in the voltage applied to the gate electrode of the drive transistor to compensate for aging of the drive transistor.
-
公开(公告)号：US07928936B2
公开(公告)日：2011-04-19
申请号：US11869834
申请日：2007-10-10
申请人： Charles I. Levey , John W. Hamer
发明人： Charles I. Levey , John W. Hamer
IPC分类号： G09G3/30
CPC分类号： G09G3/3233 , G09G3/006 , G09G2300/0842 , G09G2320/0295 , G09G2320/043
摘要： Compensating for changes in the threshold voltage of the drive transistor of an OLED drive circuit, the drive transistor includes a first electrode, second electrode, and gate electrode; connecting a first voltage source to the first electrode, and an OLED device to the second electrode and to a second voltage source; providing a test voltage to the gate electrode and connecting to the OLED drive circuit, a test circuit, that includes an adjustable current mirror causing voltage applied to the current mirror, to be at a first test level; providing a test voltage to the gate electrode of the drive transistor and connecting the test circuit to the OLED device producing a second test level after the drive transistor and the OLED device age; and using the first and second test levels to calculate changes in the voltage applied to the gate electrode of the drive transistor to compensate for drive transistor aging.
摘要翻译： 补偿OLED驱动电路的驱动晶体管的阈值电压的变化，驱动晶体管包括第一电极，第二电极和栅电极; 将第一电压源连接到第一电极，将OLED器件连接到第二电极和第二电压源; 向所述栅电极提供测试电压并连接到所述OLED驱动电路，所述测试电路包括使施加到所述电流镜的电压的可调电流镜处于第一测试水平; 向驱动晶体管的栅电极提供测试电压并将测试电路连接到OLED器件，在驱动晶体管和OLED器件老化之后产生第二测试电平; 并且使用第一和第二测试电平来计算施加到驱动晶体管的栅电极的电压的变化，以补偿驱动晶体管老化。
-
-
-
-
-
-
-
-
-
搜索结果
31 条记录 (耗时 0.026 秒)
