Hi, Ngeron

Browsing the datasheets I have here, it comes out 5v supply LCDs need :

supply voltage : 4.5 to 5 v
Input High level : 2.2 v
Input Low level : .6v

that means AS RON WROTE that Your LCD WON'T WORK @ 3v supply ..., but can be interfaced with a 3.3v supplied processor, with a separate supply.

Alain