Frequently Asked Questions

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Display Performance

The standard display will switch from bright gray to dark blue and vice versa. There two states are the natural colors of the electrochromic material that is utilized in the display.

Yes. We have also made red to black and green to black displays. Read more here.

We can also develop custom displays to match your corporate colors, brand, or similar. Please contact us and let us know your requirements

We have no black and white dispays available on the market. Only lab scale samples.

Yes. The entire display stack is printed with conventional printing equipment. Adding one additional layer is very convenient.

The image retention time will be affected by the surrounding humidity. The image retention time will decrease in a humid environment and increase in a dry environment. With proper encapsulation (such as a moisture barrier with water vapor transmission rate at 1 x 10-2 g/m2/day or lower), this humidity sensitivity can be eliminated.

In dry environments, the image retention time can be as long as 24 hours. In humid environments, it can be as little as a few seconds. A typical image retention time for indoor conditions and without any moisture barriers will range from 5 to 60 minutes. The encapsulation process will be done in an environment to optimize for the preferred performance.

The update speed is, similarly to image retention time (answered above), affected by the surrounding humidity. The update speed will be faster in a humid environment and slower in a dry environment. With proper encapsulation (such as a moisture barrier with water vapor transmission rate at 1 x 10-2 g/m2/day or lower), the humidity dependency can be eliminated. A nominal update frequency will range from 50 ms to 500 ms in an indoor environment.

Lifetime and Environmental Stability

Typically above 100 000 switching cycles. One switching cycle is counted when the display is switched from OFF -> ON -> OFF. Read more here.

-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.

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 we're targeting low-cost markets, and an active matrix would drive up the cost.

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