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热词
    • 3. 发明授权
    • Driving circuit of display element and image display apparatus
    • 显示元件和图像显示装置的驱动电路
    • US08599111B2
    • 2013-12-03
    • US12162929
    • 2007-03-08
    • Katsumi AbeMasafumi SanoRyo HayashiHideya Kumomi
    • Katsumi AbeMasafumi SanoRyo HayashiHideya Kumomi
    • G09G3/30G09G5/10
    • G09G3/3283G09G3/2014G09G3/325G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0251G09G2310/066G09G2320/0238G09G2320/043
    • A driving circuit of a display element includes a current source circuit having a first transistor and a holding circuit for holding a gate voltage of the first transistor during a first period at an electric potential corresponding to a constant current to be supplied to the display element, and a control circuit including a second transistor connected in series to the current source circuit and connected in parallel to the display element and the capacitor element whose one terminal is connected to a gate of the second transistor and the other terminal is connected to a line, and controlling the light emission time of the display element by controlling the second transistor during a third period. A constant voltage is applied from the line during the first period. The gray-scale voltage is applied from the line during a second period, and the gate of the second transistor and the one terminal are short-circuited. In addition, an electric charge based on the difference between the gray-scale voltage and the gate voltage of the second transistor is accumulated in the capacitor element, and a sweep voltage is applied during the third period, so that the ON time of the second transistor is controlled.
    • 显示元件的驱动电路包括具有第一晶体管和保持电路的电流源电路,所述保持电路用于在第一周期期间保持与要提供给显示元件的恒定电流相对应的电位的第一晶体管的栅极电压, 以及控制电路,包括与所述电流源电路串联连接并并联连接到所述显示元件的第二晶体管和所述电容器元件,所述电容器元件的一个端子连接到所述第二晶体管的栅极,并且所述另一端子连接到线路, 以及通过在第三周期期间控制所述第二晶体管来控制所述显示元件的发光时间。 在第一周期期间从线路施加恒定电压。 在第二周期期间,从线路施加灰度电压,并且第二晶体管的栅极和一个端子短路。 此外,基于第二晶体管的灰度电压和栅极电压之间的差异的电荷累积在电容器元件中,并且在第三周期期间施加扫描电压,使得第二时间的导通时间 晶体管被控制。