I have been trying to find a tutorial or discussion on using Numeric LCD displays that do not have a built-in controller.
They can be fairly involved to drive, especially those with 1/4 or less duty cycles.
You may want to start with static ones (1 com, or 1/2 duty cycle). 1/3 is manageable (you can generate the bias via a resistor network), but more than that, you want to use a chip with dedicated lcd controllers - atmel makes some.
The key is that the segments with polarity opposite that of the com goes black, and segments with polarity the same as the com's are invisible. com needs to flip constantly, but typically no faster than 100hz: too fast, you face ghosting; too slow, you face fading.
It is a bitch to drive. But incredibly low power consumption and nice visibility.