I'm interested in buying some LCD for my amateur Z80 retrocomputer, and I'm searching for 320x240 dot matrix screen with 8-bit parallel bus.
What is common for them all, they need 3 independent power connections: for logic, LCD itself and backlight... and for LCD the voltage is quite high - 23V (why is it so high?). I would like to ensure how to properly connect it without burning.
Pls see this example and that table:
As I understand:
- connection for logic is between VSS and VDD: 5V
- connection for backlight is between BLK and BLA: 5V
- connection for LCD: it needs 23V, but I'm not sure where exactly. There's written VDD-VO=23V. Does it mean I have to connect independent supply of 23V, where (-) to VO and (+) to VDD? There is also another pin: VEE, which is "output voltage for LCD" - this one is totally confusing.
Or maybe using such LCDs is dead end for amateur project?