E-paper - also known as electronic paper - is a display that mimics the look and readability of conventional paper. In contrast to conventional screens, which shine through backlit pixels, e-paper is based on an electrophoretic technology that displays text and images in an almost paper-like appearance. This means: no glaring light, but a natural display that remains easy to read even in bright sunlight.
In the context of digital signage - the digital signage familiar from advertising boards, timetables or information terminals - e-paper offers a number of advantages.
Which properties of paper are imitated?
The magic of e-paper lies in its ability to mimic key properties of paper almost perfectly. The most impressive aspects include
1. reflection-free reading: Similar to real paper, e-paper reflects ambient light instead of actively emitting it. This makes the screen easy to read even in direct sunlight and is easy on the eyes.
2. static image: Once a text or image has been displayed, it remains visible, even without a power supply. This feature is reminiscent of printed pages that remain unchanged until something new is shown.
3. thin and flexible: e-paper displays can be made extremely thin and even bendable. This makes them ideal for applications that require portability and elegance.
4. contrast and feel: Although e-paper is not physically tactile, the high contrast of black and white (or color, depending on the model) resembles the fine details of ink on paper.
How does electronic ink work?
At the heart of e-paper technology is the so-called electronic ink (e-ink). This is based on an electrophoretic technology that makes use of microscopically small capsules embedded in a thin layer between two electrodes.
Each of these capsules contains tiny particles that are differently charged and colored - typically black, negatively charged particles and white, positively charged particles. Depending on whether a positive or negative electrical voltage is applied, the particles either migrate to the surface or into the background. This creates high-resolution black and white images that remain stable until a new electrical signal changes them. In color e-paper displays, additional color layers or filters are used to create a broad spectrum of colors - a function that has made impressive progress in recent years.
The areas of application for e-paper are just as diverse as the product itself. In principle, an e-paper can be used in all areas where print material is currently used, making it a sustainable and environmentally friendly solution. However, as with any type of technology, it is important to first evaluate which framework conditions exist.
Where do we recommend the well-known digital screens instead of an e-paper?
- In the case of strongly striking colors in the content: With e-paper, colors appear paler, and many models currently only support black and white. Although color e-paper technologies are slowly coming onto the market, they do not yet offer the color intensity of LCDs.
- In a dark environment: In rooms that tend to be dark, we recommend a conventional display as e-paper works without blacklight and is therefore difficult to read in low light or dark rooms.
- In very cold temperatures: We recommend working with a display, especially when placed outside and where temperatures fluctuate greatly, sometimes falling below 0°, as the function of e-paper can be impaired.
Our experts will be happy to help you choose the right product, integrate it into your existing system and carry out subsequent maintenance.
