alt Hacker NewsThey obviously do. E-ink display in this topic, for example, is 12:1[1]. The best (contrast wise) e-ink displays available commercially are around 20:1. The trashiest LCD, on the other hand, will be around 500:1.
1. https://www.panelook.com/ED047TC1_E_Ink_4.7_EPD_parameter_25...
Measuring the contrast within the display means practically nothing compared to measuring the contrast in the real world environment, which in this case is outdoors and hopefully in the sun.
Compared to the full contrast range of the sun lit real world, all displays emitting light function in a very narrow and very dark contrast range. An eInk display does not emit light, so in that environment you have a clear separation between bright and dark.