Frequently Asked Questions
and the answers to it
What is eInk?
E-paper displays reflect light like normal paper, so they are passive (non-luminous) displays. Texts or images are displayed permanently without the need for a maintenance voltage. Energy is only required to change the display.
Well-known examples of black/white ePaper are eBook readers like the Amazon Kindle.
Does the picture frame light up?
No, the picture frame does not have its own lighting. This ensures that the picture remains clearly visible even in strong ambient light, unlike conventional displays that rely on backlighting.
How does the image appear?
The image is displayed using modern eInk technology on an AcEP display. This display generates colors through dithering, which makes it particularly suitable for graphics.
The white of the display appears slightly grayish compared to backlit displays, as it does not have its own light source. This feature helps the image remain glare-free even in direct ambient light but is only partially suitable for photos.
Do I need an account?
Yes, to use the app and paperlesspaper, you need an account. You can sign up using an email, Google, or Apple account.
Where are the images generated?
The images of the integrations are generated on our server, converted, and from there loaded onto the picture frames.
Is the image colored?
Yes, the image is displayed in color. For this, colored pigments within the display are specifically shifted. A total of 7 basic colors are available, with intermediate tones being created through dithering.
What is Dithering?
Dithering is a technique used in digital image processing to create the impression of more colors or shades than are actually available. This is achieved by arranging pixels of different colors or brightness in a specific pattern. The human eye perceives these pixels from a distance as a uniform mixed color.
Detailansicht des DitheringsHow long does the picture frame take to update?
An update takes about 1 minute, with around 40 seconds used for the movement of particles in the display.
Depending on the settings, the picture frame checks for new images every 5 minutes up to once a day. Frequent updates can significantly reduce battery life.
An update can also be triggered manually immediately using the button on the back.
What is NB-IoT/LTE-M?
Both NB-IoT and LTE-M belong to the category of Low Power Wide Area Networks (LPWAN), which are very energy-efficient wireless transmission technologies. They enable a variety of IoT applications that focus on low costs, low energy consumption, and good building penetration. Since both standards are based on 4G/5G technology, they are extremely secure.
Unlike sensors that cannot transmit over long distances (Bluetooth, Wi-Fi), both NB-IoT and LTE-M work via Plug & Play.