30 pin 4 digit display

standard 4 display

I understand that, which will work for a standard 4 segment schematic like above..but if im not mistaken...

this 4 digit display

..this one's input/output isn't seperated logically per segment and you really need to be continually swapping the voltage for each number..thus a costant need to refresh the screen. im new to this, but please let me know if im incorrect in this