I salvaged an Optrex DMF5001NY-LY-ATE-BBN 160x128 pixel graphic LCD. It uses T6963C so shouldnt be anything special about that.
Otherwise the schematic and display is clear to use but the LCD drive supply voltage is a big mystery. What should the voltage be? The display does not seem to have a built in charge pump.
In the datasheet it says that logic supply voltage should be -0,3V - 7V (VCC - VSS). This is clear. 5V from GND to VCC and it works.
But the LCD drive supply voltage is a mystery. It is stated as -0,3V - 30V (VCC - VEE). So if VCC is 5V, should VEE be 4,7V - 35V??? Or should it be negative -5,3V - -25V? This is the part I do not understand and would need help with.
Thanks in advance!](https://www.beyondinfinite.com/lcd/Library/Optrex/DMF-5001NY-LY-ATE-BBN.pdf)