Why do e-papers consume so little energy… and last for years on batteries?

In the world of Digital Signage, energy efficiency has ceased to be an “extra” and has become a decisive factor. Among the various available technologies, e-papers (based on e-ink technology) stand out as one of the smartest solutions for companies seeking to reduce operational costs and increase sustainability.

How do e-papers work?

Unlike traditional LED screens/LCD displays, which need to be permanently illuminated to keep the image visible, e-papers work in a completely different way:

• They only consume energy at the exact moment the image is updated;
• After the update, the image remains visible with extremely low (almost residual) power consumption;
• This feature allows many devices to run on batteries for several months or even years, depending on the update frequency.

Key benefits of e-papers

1. Drastic reduction in energy consumption
   They can achieve a reduction of up to 99% in consumption compared to traditional LCD/LED screens, resulting in virtually non-existent electricity costs.
2. Lower maintenance and greater longevity
   Battery replacements become very rare, which significantly reduces costs and the time dedicated to maintenance.
3. Flexible installation
   They allow the implementation of Digital Signage solutions in locations where there is no easy access to the electrical grid, such as warehouses, car parks, rural areas or shop windows.
4. Real sustainability
   Lower energy consumption, fewer discarded batteries and greater durability contribute to a lighter environmental footprint.
5. Excellent visibility
   They offer comfortable reading even in direct sunlight, without reflections, similar to the experience of printed paper.

Most common applications of e-papers

E-papers have been successfully adopted across various sectors:

• Retail and Supermarkets: Digital labels on shelves (ESL), dynamic promotion of products and prices
• Hospitality and Catering: Menu and dish identification, restaurant pricing and information on room occupancy at events
• Transport and Mobility: Timetable information at stops, stations and airports
• Industry and Logistics: Warehouse signage, product identification and stock control
• Healthcare: Information in hospitals, clinics and pharmacies
• Corporate: Directories, room occupancy, maps and internal building signage
• Advertising and Events: Applications in environments with limited access to electricity.

Amplitude Net’s commitment

Amplitude Net has integrated e-papers into its Digital Signage network, as it believes the future lies in smarter, more efficient and more sustainable solutions.

The aim is to offer clients a more cost-effective and environmentally responsible way of communicating, while maintaining high standards of quality and visual impact.

Conclusion

In a context of rising energy costs and increasing sustainability demands, e-papers have moved beyond being an alternative technology to establish themselves as a strategic option for many organisations.