I've got hold of several bare-glass T218010 LCDs and would like to drive them with a bare MCU (or, rather, an MCU plus a couple latched-output SIPO shift registers such as 74HC595). However, the only useful information I've found on the topic of driving glass-only LCDs is Atmel app-note AVR340, which describes a way of driving a 1/2-bias 4-backplane LCD with logic-level output. The problem with this is that the particular LCDs I happen to have are stated in the datasheet to be 1/3-bias, and I haven't found any useful information on direct-driving those (besides the obvious "buy a driver IC"). Which led me to wonder how big of a problem it really is.
My question, thus, is how significant sticking to the datasheet-specified driving method is and what might happen if one were to violate the specs in that respect. On top of that, any additional knowledge on LCDs, methods of driving them, pointers to useful materials, etc. would be greatly appreciated.