E-Paper Display (EPD)

Active Matrix / Segment / Ink-In-Motion

About E-Paper technology

Two Pigment Ink System

The two pigment electronic ink system is made up of millions of tiny microcapsules, each about the diameter of a human hair. Each microcapsule contains negatively charged white particles and positively charged black particles suspended in a clear fluid. When a positive or negative electric field is applied, corresponding particles move to the top of the microcapsule where they become visible to the viewer. This makes the surface appear white or black at that spot.

Three Pigment Ink System

THere is also a 3-pigment ink system in a microcup structure. This ink was engineered specifically for Electronic Shelf Labels (ESL). It works similarly to the dual pigment system, in that a charge is applied to the pigments, and to a top and bottom electrode to facilitate movement. However, instead of the use of microcapsules, this system utilizes Microcups, which are filled with the liquid and sealed.

Advanced Color ePaper (ACeP)

In 2016 a multi-pigment ink system, Advanced Color ePaper (ACeP), was showcased. ACeP achieves a full color gamut, including all eight primary colors, using only colored pigments. The ink can be incorporated into either microcapsule or microcup structures. Color is achieved by having all the colored pigments in every pixel, removing the need for a color filter array. ACeP maintains the ultra-low-power and paper-like readability under all lighting conditions of regular ePaper.