Lifetime and Environmental Stability
The lifetime of the display is directly correlated with the number of switching cycles that are performed. One switching cycle is counted when the display is switched from OFF -> ON -> OFF. The degradation of the display is caused when a voltage is applied to turn the display off (from colored to bright state). Close to no degradation is caused if the display is constantly on (colored) or when it is constantly off (bright state). With accurate driving, the lifetime will exceed 100 000 switching cycles.
-5 to +40 degrees Celsius has been confirmed. However, no permanent damage has been observed in temperature from -20 to +80 degrees Celsius, but the display driver needs to be modified.
The displays are not sensitive to UV.
Not with appropriate encapsulation. For non-encapsulated displays, variations in humidity will affect update speed and image retention time. The humidity dependency can be eliminated with proper encapsulation (such as a moisture barrier with water vapor transmission rate at 1 x 10-2 g/m2/day or lower). Read more about update speed and image retention time
General Technology Questions
No. The rdot display and E Ink display are fundamentally different technologies. They both share the same principle of being reflective display technologies, meaning that they reflect ambient light and that no backlight is needed. E Ink is an electrophoretic technology. The Rdot Display is utilizing organic electrochromic materials.
We do not have matrix versions on the market yet. We expect to introduce an entirely printed passive matrix version in 2019. There is no fundamental limitation regarding active matrix versions, but there is currently not any projects involving active matrix.