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    • 8. 发明授权
    • Driver with driving current interruption
    • 驱动电流中断驱动
    • US07817114B2
    • 2010-10-19
    • US10994310
    • 2004-11-23
    • Masami IsekiSomei KawasakiFujio KawanoTakanori Yamashita
    • Masami IsekiSomei KawasakiFujio KawanoTakanori Yamashita
    • H03K5/153
    • G09G3/3283G09G3/3241G09G3/325G09G3/3266G09G2300/0842G09G2300/0861G09G2310/0289G09G2330/021G09G2330/026G09G2330/045
    • A display apparatus includes a plurality of pixel circuits, wherein each of the pixel circuits comprises a light emitting element, a drive transistor for supplying the light emitting element with a current, as a driving current, of a quantity corresponding to a potential between a gate and a source of the drive transistor, a first switch for controlling a flow of the current supplied to the light emitting element, a second switch for switching between a first state of setting the potential between the gate and the source of the drive transistor and a second state of holding the potential between the gate and the source of the drive transistor, and a circuit for supplying the first switch with a signal for switching a state of controlling the flowing of the current of the driving current. In addition, a circuit supplies the second switch with a signal for switching the second switch between the first and second states, and a circuit sets the potential between the gate and the source of the driving transistor at a potential to flow the driving current so as to set the light emitting element at a low level driving state, at a time of starting a power source or a waiting state of the power source, and under a state that the first switch suppresses the flowing of the driving current and the second switch is at the first state.
    • 显示装置包括多个像素电路,其中每个像素电路包括发光元件,用于向发光元件提供与栅极之间的电位相对应的电流作为驱动电流的驱动晶体管 以及驱动晶体管的源极,用于控制提供给发光元件的电流的第一开关,用于在设定驱动晶体管的栅极和源极之间的电位的第一状态之间切换的第二开关和 保持驱动晶体管的栅极和源极之间的电位的第二状态,以及用于向第一开关提供用于切换控制驱动电流的电流的状态的状态的信号的电路。 此外,电路为第二开关提供用于在第一和第二状态之间切换第二开关的信号,并且电路将驱动晶体管的栅极和源极之间的电位设置为使驱动电流流过,从而 将发光元件设定在低电平驱动状态,在启动电源或电源的等待状态时,在第一开关抑制驱动电流和第二开关的流动的状态下 在第一个状态。
    • 9. 发明申请
    • Current programming apparatus, active matrix type display apparatus, and current programming method
    • 现行编程装置,有源矩阵型显示装置和现行编程方法
    • US20060114194A1
    • 2006-06-01
    • US11283743
    • 2005-11-22
    • Somei KawasakiMasami IsekiFujio KawanoTakanori Yamashita
    • Somei KawasakiMasami IsekiFujio KawanoTakanori Yamashita
    • G09G3/30
    • G09G3/325G09G2300/0842G09G2310/0248G09G2320/0223
    • An active matrix type display apparatus in which a plurality of pixel circuits each having an electroluminescent element EL, a 1st FET to control a current flowing in the EL, and a 2nd FET provided between a gate and a drain of the 1st FET are arranged in a matrix, the plurality of pixel circuits arranged in one direction are connected to a data line every column, the 2nd FET is turned on for a predetermined time period, and an image data current flowing in the data line is supplied to the gate and drain of the 1st FET, thereby writing a current value of the image data current. A preliminary charging circuit is connected to the data line. Before the writing operation in the predetermined time period is expired, a current of a predetermined current value is applied to the image data current so that a gate-source voltage of the 1st FET is equal to or larger than a threshold value. Thus, writing imperfection due to a variation in threshold voltage of the 1st FET is solved.
    • 一种有源矩阵型显示装置,其中分别具有电致发光元件EL的多个像素电路,用于控制在EL中流动的电流的第一FET,以及设置在第一FET的栅极和漏极之间的第二FET设置在 矩阵,沿一个方向布置的多个像素电路每列连接到数据线,第二FET导通预定时间段,并且流过数据线的图像数据电流被提供给栅极和漏极 从而写入图像数据电流的当前值。 预充电电路连接到数据线。 在预定时间段内的写入操作期满之前,将预定电流值的电流施加到图像数据电流,使得第一FET的栅极 - 源极电压等于或大于阈值。 因此,解决了由于第一FET的阈值电压的变化引起的写入缺陷。
    • 10. 发明授权
    • Current programming apparatus and matrix type display apparatus
    • 现行编程设备和矩阵式显示设备
    • US07969392B2
    • 2011-06-28
    • US11283862
    • 2005-11-22
    • Takanori YamashitaMasami IsekiFujio Kawano
    • Takanori YamashitaMasami IsekiFujio Kawano
    • G09G3/30G09G3/10
    • G09G3/325G09G2300/0861G09G2320/029G09G2320/043
    • A matrix type display apparatus includes a pixel circuit unit including electroluminescent elements and pixel circuits driving the electroluminescent elements arranged in a matrix, a plurality of data lines, each corresponding to a column of the pixel circuits for supplying a data current to the pixel circuits, and predetermined current setting circuits for supplying to the data lines a predetermined current for reducing a current to be supplied to the data lines, according to a setting by a reference current unrelated to a displaying, at a time of black displaying of the electroluminescent elements. In addition, switches are arranged corresponding to each of the data lines between the pixel circuits and the predetermined current setting circuits, and a row scanning circuit controls on and off of the switches. The row scanning circuit turns off the switches to disconnect the pixel circuit unit and the predetermined current setting circuits, and sets the predetermined current in the predetermined current setting circuits, and thereafter, the row scanning circuit turns on the switches to connect the pixel circuit unit and the predetermined current setting circuits, and to supply the data lines with the data current and the predetermined current.
    • 矩阵型显示装置包括:像素电路单元,包括电致发光元件和驱动排列成矩阵的电致发光元件的像素电路;多个数据线,分别对应于用于向像素电路提供数据电流的像素电路列, 以及预定电流设定电路,用于在电致发光元件的黑色显示时,根据与显示无关的参考电流的设置,向数据线提供用于减少要提供给数据线的电流的预定电流。 此外,开关对应于像素电路和预定电流设置电路之间的每条数据线布置,并且行扫描电路控制开关的导通和关断。 行扫描电路关闭开关以断开像素电路单元和预定电流设置电路,并将预定电流设置在预定电流设置电路中,之后行扫描电路接通开关以连接像素电路单元 和预定的电流设定电路,并向数据线提供数据电流和预定电流。