Next-Gen ePaper Delivers Richer Colors

April 8, 2022

Offering 4,096 colors with greater saturation, E Ink’s Kaleido 3 digital paper targets eBooks and multiple other displays.

William G. Wong

Related To: Electronic Design

E Ink’s digital paper, often called ePaper, has found a home in e-readers, displays, and even covering cars. Balancing the need for high-quality displays and power requirements has always been a challenge. It started as a grayscale display, but color ePaper displays have been available for a while.

The latest generation, E Ink’s Kaleido 3, takes the quality to a new level. It can deliver 16 levels of grayscale and 4,096 colors. This new display increases color saturation by 30% compared to the earlier Kaleido Plus. It can display animations and videos.

The Kaleido 3 employs a color filter array (CFA) that’s used in conjunction with E Ink’s Carta black-and-white ink film. The display also uses the company’s ComfortGaze, a front-light technology designed by E Ink's Front Light Team. The technology reduces the amount of blue light reflected off the surface of the display and lowers the blue light ratio (BLR) by 60% and blue light toxicity factor (BLTF) by 24%. This provides more comfortable viewing for users.

The E Ink Kaleido 3 module is available in 7.8-, 10.3-, and 13.3-in. versions. It targets eBooks as well as other display applications.

About the Author

William G. Wong | Senior Content Director - Electronic Design and Microwaves & RF

I am Editor of Electronic Design focusing on embedded, software, and systems. As Senior Content Director, I also manage Microwaves & RF and I work with a great team of editors to provide engineers, programmers, developers and technical managers with interesting and useful articles and videos on a regular basis. Check out our free newsletters to see the latest content.

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I earned a Bachelor of Electrical Engineering at the Georgia Institute of Technology and a Masters in Computer Science from Rutgers University. I still do a bit of programming using everything from C and C++ to Rust and Ada/SPARK. I do a bit of PHP programming for Drupal websites. I have posted a few Drupal modules.

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