Every LCD or OLED screen has an IC bonded to the panel ... SPI and I2C displays differ in their wiring. I2C displays rarely ever need anything other than SDA and SCL. Here’s one exception ...

The experimental setup for this is eleven OLED displays with 128×64 pixels with an SSD1306 controller, all driven by an STM32 over I2C. Everything’s on a breadboard, and the actual display is ...