Small displays from EA DOG series are available with SPI interface
Some of the EA DOG displays with SPI from ELECTRONIC ASSEMBLY are small and with 2.0 or 2.8 millimeters quiet flat. The display suits ideal for small handheld applications. There are text displays with 1x8 up to 4x20 character as well as graphic displays with 102x64 .. 240x128 dots. All of them are equipped with SPI interface. Even with backlight these small displays are not thicker than 5.8 or 6.4 millimeters. If you want to connect these displays with the computer there is a USB testboard available. It's called EA 9780-3USB. These DOG displays with SPI (I2C) are most suitable for small applications and made for single supply 3.3V application.