Normally driving an LCD requires seven connections to pins on the display, but by using a shift register, [Phillip Warner] at Arduino Playground was able to drive an LCD using only 3 wires.

To link a standard 16×2 LCD directly with the microcontroller, for instance Arduino, you would need atleast 6 I/O pins to talk to the LCD. However, if you use an LCD module with I2C interface, you ...

QUEENS, N.Y.--(BUSINESS WIRE)--World Maker Faire – EarthMake ... that is used for GPU communication and Arduino programming. The 3.5" LCD has 64% more display area than a 2.8" LCD Shield.