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    • 19. 发明授权
    • Display unit
    • 显示单元
    • US5757054A
    • 1998-05-26
    • US714439
    • 1996-09-16
    • Mamoru MiyawakiShunsuke Inoue
    • Mamoru MiyawakiShunsuke Inoue
    • G02F1/136G02F1/1362G02F1/1368G09F9/30H01L27/06H01L29/04H01L31/036
    • G02F1/136277H01L27/0688G02F1/13454
    • The present invention solves problems as follows: a problem that, since light for displaying enters into a semiconductor substrate, carrier induced by light occurs in the semiconductor substrate, potential of the substrate fluctuates, and hence display characteristics become worse; a problem that, in the semiconductor substrate, voltages are applied to the peripheral driving circuits so as to operate the peripheral driving circuits formed in a single-crystal area, which makes display characteristics worse by the voltages being conducted to the display area through the substrate; and a problem that, in case potentials of adjacent pixels greatly differ, the difference locally changes. For this purpose, in a display unit including an active matrix substrate having an image display portion being provided with a plurality of switches and a driving circuit for supplying driving signals to the switches around the image display portion, an opposing substrate opposing the active matrix substrate and having a transparent electrode, and a liquid crystal material between both of the active matrix substrate and the opposing substrate, heavily doped impurity regions having impurity density heavier than that of the semiconductor substrate are formed in the image display portion, and the heavily doped impurity regions are connected to a fixed potential around the image display portion.
    • 本发明解决了以下问题:由于用于显示的光进入半导体衬底,所以在半导体衬底中产生由光引起的载流子,所以衬底的电位变动,因此显示特性变差; 在半导体基板中,向周边驱动电路施加电压以对形成在单晶区域中的外围驱动电路进行操作的问题在于,通过通过基板向显示区域传导的电压使显示特性变差 ; 以及在相邻像素的电位大大不同的情况下,差异局部变化的问题。 为此,在包括具有图像显示部分的多个开关的有源矩阵基板和用于向图像显示部分周围的开关提供驱动信号的驱动电路的显示单元中,与有源矩阵基板相对的相对基板 并且在有源矩阵基板和相对基板两者之间具有透明电极和液晶材料,在图​​像显示部分中形成具有比半导体基板重的杂质密度的重掺杂杂质区,并且重掺杂杂质 区域连接到图像显示部分周围的固定电位。