Driver circuit for thin film transistor-liquid crystal display

A driver circuit for a sequential and double scanning of a thin film transistor liquid crystal display (TFT-LCD), comprising;

• scanning pattern generator means for receiving a scanning direction signal, a display image mode signal and a first clock signal and for generating a complementary pair of second clock signals, first and second masking signals and a plurality of scanning pattern signals in accordance therewith;
• ripple counter means for counting the second clock signals generated by the scanning pattern generator means and outputting a plurality of count signals;
• multiplexer means for selecting from among the plurality of count signals outputted by the ripple counter means those count signals corresponding to a scanning direction in accordance with the scanning direction signal;
• decoder means for decoding the count signals selected by the multiplexer means and outputting plural decoding signals in conformity with the scanning direction;
• masking logic means for outputting a masking pulse signal in accordance with the masking signals from the scanning pattern generator means and the display image mode signal;
• NOR gate array means including a plurality of NOR gates for each NORing the masking pulse signal from the masking logic means with a respective one of the plurality of decoding signals outputted by the decoder means and outputting a plurality of enable signals in accordance therewith;
• and
• output cell array means including a plurality of output cells for logically operating the plurality of enable signals outputted from the NOR gate array means with the plurality of scanning pattern signals generated by the scanning pattern generator means and applying the resultant logically operated signals as scanning signals to respective gate lines of the TFT-LCD.