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TFT的器件特性是影响氧化物TFT驱动的LCD显示屏良率的关键因素.本文研究了氧化物TFT的关键特性参数(阈值,稳定性)对窄边框LCD显示屏的良率和可靠性的影响.氧化物TFT阈值过负,将会导致TFT无法正常关断,而使显示屏的外围移位寄存器(VSR)电路失效.另外,在显示区域用于像素驱动的氧化物TFT的高温和背光照射下阈值持续负向漂移,最终会导致显示区域的驱动TFT漏电流过大,从而使显示屏出现串扰和残影不良.“,”The characteristics of TFT are critical to the reliability of metal oxide-TFT drived LCD. The effect of Vthand stability of oxide-TFT to the reliability of narrow-bezel LCD display were re-searched. The negative Vthof the normal-on oxide-TFT can result in the failure of VSR scan circuits. Others,the negative-shift of the Vthof TFT in pixel at high temperature and under back-light illumi-nation can cause the Vthnegative shift and results in the cross-talk or image-sticking because of the high leakage current of TFT.