| 摘要 |
<p>PURPOSE:To display picture elements with high quality by providing an active display picture element driving device with MOS diodes reversely in parallel. CONSTITUTION:Source electrodes 7 and drain electrodes 8 made of n<+> poly-Si, channel areas 9 made of nondoped poly-Si, gate insulating films 10 made of SiO2, and electrodes made of ITO are provided on an insulating substrate 6 to constitute an active device. At this time, the poly-Si MOS diodes of the source electrodes 7 are provided reversely in parallel. Consequently, a threshold voltage Vth is made proper by controlling the film thickness of the gate insulating films 10 and poly-Si film thickness. Thus, the Vth of the active device is made proper, so the liquid crystal can be driven effectively.</p> |
