ABSTRACT
In the previous chapters we saw that the threshold voltage shift in the TFT based on non-crystalline semiconductors is a fundamental bottleneck for circuit design.
As long as the TFT is used as a switch the threshold voltage shift can be compensated for by setting the off voltage of the switch to a level that aids recovery. However, if the TFT switch is on for longer periods than it is kept off, the threshold voltage shift in the TFT will cause the transfer characteristics of the TFT to vary with time thereby affecting the circuit operation. In this chapter we discuss the use of compensation circuits to compensate for the threshold voltage shift in the TFT [164]-[176].
