You should look up portable monitors. They are crazy small, cheap and good nowadays.
You can get a 15-16" OLED external display with a battery for around 300 western monetary units. Half that if you stick to IPS panels[0]. You can shove one of those in a backpack easily.
You can get a 15-16" OLED external display with a battery for around 300 western monetary units. Half that if you stick to IPS panels[0]. You can shove one of those in a backpack easily.
[0] https://www.amazon.de/-/en/Portable-Monitor-Connection-Raspb...