E-Paper Sustainable Signage Solution
Smart Display, Infinite Efficiency
What Is E-Paper?
A reflective, paper-like display
E-paper is a reflective display that shows text and images with reflected ambient light instead of a backlight. E-paper, also called electronic paper or EPD, is a reflective display technology that looks like printed paper rather than a glowing screen. Instead of a backlight it forms an image by reflecting the light already in the room. It uses electrophoretic ink and is found in e-readers, electronic shelf labels, transit displays and medical devices.
How the image is formed
An e-paper image is built by using an electric field to move charged black and white ink particles held in microcapsules. The ink layer holds millions of microcapsules. Each capsule contains a clear fluid with charged black and white pigment particles. An electric field moves the particles toward or away from the surface to build text and images. Because the picture is made from reflected ambient light, it reads as naturally as ink on paper and stays sharp in direct sunlight.
Bi-stable, near-zero power
E-paper is bi-stable: it draws power only to change the image, then holds it with none. E-paper is bi-stable, so the image stays on screen even after power is removed. The display draws energy only during the instant it refreshes, then holds the image with no further power. Compared with LCD and OLED, which need continuous power to hold any image, e-paper's zero static power is a decisive advantage for energy use and sustainability.
E-Paper vs LCD vs OLED
| Attribute | E-Paper | LCD | OLED |
|---|---|---|---|
| Light source | Reflective, ambient light | Backlight | Self-emitting |
| Static power, image held | Near zero | Continuous | Continuous |
| Sunlight readability | Excellent | Poor to fair | Fair |
| Refresh speed | Slow, page updates | Fast | Fast |
| Motion and video | Not suited | Good | Excellent |
| Eye comfort | Paper-like, no backlight | Backlit | Backlit |
| Colour | Mono or limited colour | Full colour | Full colour |
| Best fit | Static info held for long periods | General UI and video | Vivid video, dark UI |
Where E-Paper Works
CAYIN delivers customized E-Paper display systems for the environments below and more.
Warehouse & Logistics
Barcode and bin labels, location tags and pick lists update over the network and hold their content through power cycles, so the floor always shows the latest data without printing.
Education & Campus
Room schedules, class boards and library or department notices run across every building on very low power, refreshed centrally without staff walking each sign.
Healthcare
Ward boards, bed cards, clinic queue displays and wayfinding stay accurate and glare-free, updated from the hospital system rather than reprinted by hand.
Transportation
Timetables, platform and gate information and route maps stay readable in daylight and keep their image during outages, ideal for stations and stops with limited power.
Retail & Supermarket
Electronic shelf labels, promotion cards and aisle signs update from the pricing system in seconds, keeping every price accurate across the store without printing or manual swaps.
Corporate & Meeting Rooms
Room booking panels, desk signs and lobby directories sync with the calendar system and hold their content on almost no power, giving offices a clean, paper-free look.
Customer Story
National Taipei University sets new standards with E-Paper class timetables
The campus replaced printed weekly schedules with networked E-Paper boards that update centrally and hold their content without power, cutting paper use across every department.
Read the full case study ›E-Paper Advantages for Digital Signage
Ultra-low Power Consumption and Continuous Display
Power is drawn only during the one-to-two-second page refresh, then the screen holds its content with almost no energy, cutting running costs for signage that stays on for long periods.
180-Degree Ultra-Wide Viewing Angle
Content stays clearly readable from any angle, so transit signs, mall displays and meeting boards work for everyone in the space.
Lightweight and Portable
Thin and light for flexible installation almost anywhere, from warehouse labels to hospital info cards to shelf price tags, and updatable at any time.
Eco-Friendly and Sustainable
Reusable displays replace single-use paper signs, cutting waste, resource use and carbon emissions and supporting ESG goals in retail, meetings and education.
Durability
More rugged than traditional screens and stable over long periods, suited to public transport, logistics and factory labels, and employee ID badges.
Clear Visibility Under Sunlight
The display reflects ambient light instead of emitting it, so the image stays sharp and glare-free in direct sun, ideal for outdoor signage and traffic signs.
System Requirements
For more information, please contact CAYIN Technology’s sales team. We will help you create the optimal E-Paper display solution tailored to your needs.
Frequently Asked Questions
What is CAYIN's E-Paper Sustainable Signage Solution?
It is an ODM software platform that lets device makers run CAYIN e-paper display systems on their own hardware, for retail, healthcare, transport, education and more.
How much power does an e-paper display use?
Power is drawn only when the image changes. Between updates the screen holds its content with almost no energy, so running costs stay very low.
Can e-paper displays be read outdoors and in direct sunlight?
Yes. E-paper reflects ambient light instead of emitting it, so the image stays sharp and glare-free in bright sun, unlike backlit LCD screens.
How does e-paper support ESG and sustainability goals?
Each display is reused many times instead of printing new paper signs, cutting waste, resource use and carbon emissions across the deployment.
Where is e-paper signage typically used?
Common uses include electronic shelf labels, transit timetables, meeting room signs, hospital bed cards, campus notices, factory and logistics labels, and outdoor wayfinding.
How do I get CAYIN E-Paper on my own devices?
Contact the CAYIN sales team. As an ODM product the solution is tailored to your hardware and use case, and the CAYIN team helps plan the integration.
