Thin-film transistor liquid crystal display devices that generate gray level voltages having reduced offset margins

摘要

TFT-LCD devices having improved data line driver circuits therein comprise an follower amplifier which drives a data line of a panel "hard" during a first portion of a selection time interval (when a strong pull-up or pull-down is required) and a transmission gate which performs a "soft" pull-up or pull-down of the data line to a desired gray level voltage during a second portion of the selection time interval. The "soft" pull-up or pull-down can be utilized to reduce the offset margins of gray level voltages to within ±5 mV.