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    • 15. 发明申请
    • LIGHT EMITTING DISPLAY DEVICE
    • 发光显示装置
    • US20090231241A1
    • 2009-09-17
    • US12294598
    • 2007-08-08
    • Katsumi Abe
    • Katsumi Abe
    • G09G3/30
    • G09G3/3241G09G3/2011G09G2300/0417G09G2300/0842G09G2300/0861G09G2300/0866G09G2310/0251G09G2310/061G09G2320/0223G09G2320/0233G09G2320/0238G09G2330/025
    • A light emitting display device using a drive circuit formed of only unipolar thin film transistors, which suppresses effects of characteristic shifts of transistors, and is applicable to large, high-resolution light emitting displays. The device includes a pixel having an organic EL device (LED) and a drive circuit thereof. In a current writing period, the drive circuit sets TFT3, TFT4 and TFT5 ON and sets a ground line and one end of LED to the same voltage through TFT3. A current from a data line is supplied to transistors L-TFT and D-TFT forming a current mirror circuit through TFT4 and TFT5, and a voltage between gate and source terminals of L-TFT and D-TFT is retained in a capacitor. During a LED driving period, TFT3, TFT4 and TFT5 are interrupted, and a current flowing between the source and drain of D-TFT is supplied to LED according to the retaining voltage.
    • 一种使用仅由单极薄膜晶体管形成的驱动电路的发光显示装置,其抑制晶体管的特性偏移的影响,并且可应用于大的高分辨率发光显示器。 该器件包括具有有机EL器件(LED)的像素及其驱动电路。 在当前的写入周期中,驱动电路将TFT3,TFT4和TFT5置为ON,并将LED的地线和一端通过TFT3设置为相同的电压。 来自数据线的电流被提供给通过TFT4和TFT5形成电流镜电路的晶体管L-TFT和D-TFT,并且L-TFT和D-TFT的栅极和源极端子之间的电压被保留在电容器中。 在LED驱动期间,中断TFT3,TFT4和TFT5,并且根据保持电压将在D-TFT的源极和漏极之间流动的电流提供给LED。
    • 17. 发明申请
    • PIXEL CIRCUIT AND IMAGE DISPLAY APPARATUS HAVING THE PIXEL CIRCUIT
    • 具有像素电路的像素电路和图像显示装置
    • US20090102829A1
    • 2009-04-23
    • US11683872
    • 2007-03-08
    • Katsumi AbeHideya KumomiRyo HayashiMasafumi Sano
    • Katsumi AbeHideya KumomiRyo HayashiMasafumi Sano
    • G06F3/038G09G3/20
    • G09G3/325G09G2300/0819G09G2300/0842G09G2300/0861G09G2320/043
    • A pixel circuit and an image display apparatus are provided making use of a hysteresis characteristics of a transistor for driving a display element. The pixel circuit comprises: a transistor providing both different first and second relations between a gate voltage value and a drain current value at a transition from off state to an on state, and from the on state transits to the off state respectively; a display element supplied as a drive current with a current controlled by the transistor; and a capacitor element connected to a gate electrode of the transistor. One of the first and second relations is utilized during a first period for setting the drive current to be supplied to the display element. And, the other of the first and second relations is utilized during a second period for supplying the drive current to the display element to effect light emission.
    • 使用用于驱动显示元件的晶体管的滞后特性来提供像素电路和图像显示装置。 像素电路包括:晶体管,在从断开状态转换到导通状态时,分别在栅极电压值和漏极电流值之间分别具有不同的第一和第二关系,以及从导通状态转移到断开状态。 以由晶体管控制的电流作为驱动电流提供的显示元件; 以及连接到晶体管的栅电极的电容器元件。 第一和第二关系中的一个在第一时段期间被利用来设定要提供给显示元件的驱动电流。 并且,在第二时段期间利用第一和第二关系中的另一个来向显示元件提供驱动电流以实现发光。
    • 18. 发明申请
    • DRIVE CIRCUIT AND DRIVE METHOD OF LIGHT EMITTING DISPLAY APPARATUS
    • 发光显示装置的驱动电路和驱动方法
    • US20080225023A1
    • 2008-09-18
    • US12028588
    • 2008-02-08
    • Hisae ShimizuKatsumi Abe
    • Hisae ShimizuKatsumi Abe
    • G06F3/038
    • G09G3/3233G09G3/3291G09G2300/0417G09G2300/043G09G2300/0819G09G2300/0861G09G2310/0262G09G2320/043
    • A drive circuit for a light emitting display apparatus including a pixel circuit having a light emitting device for emitting a light having brightness determined based on supplied current and a drive transistor for supplying the current to the light emitting device, comprises a threshold value correction circuit converting a second signal including a threshold voltage of the drive transistor and a data voltage, the second signal being output from the drive transistor when a first signal including the data voltage is input into the control electrode of the drive transistor, into a third signal including the threshold voltage of an inverted polarity and the data voltage or a voltage corresponding to the data voltage, to output the converted third signal to the pixel circuit. The pixel circuit includes a switch for supplying the third signal to the control electrode of the drive transistor.
    • 一种用于发光显示装置的驱动电路,包括具有发光装置的像素电路,所述发光装置用于发射基于所提供的电流确定的亮度的光和用于向所述发光装置提供电流的驱动晶体管,所述驱动电路包括阈值校正电路转换 包括驱动晶体管的阈值电压的第二信号和数据电压,当包括数据电压的第一信号被输入到驱动晶体管的控制电极时,第二信号从驱动晶体管输出到第三信号,第三信号包括 反转极性的阈值电压和数据电压或对应于数据电压的电压,以将转换的第三信号输出到像素电路。 像素电路包括用于将第三信号提供给驱动晶体管的控制电极的开关。