The requirements of charging or discharging voltage accuracy on pixel electrode is described. The recent progress of TFT-LCD is also reported.

We found by the three-electrode experimental cell, deposition of metallic lithium during low-temperature charging is related to electrolyte, charging rate, cut-off voltage and so on.

Calcium fluoride content in calcium cyanamide charging is determined by a fluoride ion selective electrode method, and its conditions and applications are tested.