36.6.2.4 1/4 Duty and 1/3 Bias

1/3 bias is optimal for LCD displays with four common terminals (1/4 duty). In the waveform shown in the following figure, SEG0–COM0 is the voltage across a segment that is on and SEG0–COM1 is the voltage across a segment that is off.

Figure 36-6. Driving an LCD with Four Common Terminals