E Ink's Kaleido 4 Promises Brighter, Clearer Color E-Readers

E Ink has unveiled its latest color e-paper technology, Kaleido 4, which it says brings substantial improvements over the previous generation, Kaleido 3. According to the company, the new display is brighter and offers greater clarity while reducing the perception of screen graininess—a common criticism of color e-readers.

TechRadar reports that Kaleido 4 can produce more than 40,000 colors, double the amount of Kaleido 3. It also features a higher refresh rate, a 15% increase in white reflectance, and a 50% improvement in contrast. Videos can be played at 18 frames per second, though the practical appeal of watching video on an e-paper screen remains questionable.

These claims, if accurate, could address some longstanding drawbacks of color e-readers. As TechRadar notes, color e-readers have typically suffered from muted colors and screens that appear darker and grainier than their black-and-white counterparts, even when displaying plain text. They also tend to carry a premium price. For those reasons, many readers have stuck with monochrome e-readers for standard books and turned to tablets or paper for color content.

The improved clarity and brightness of Kaleido 4 might make normal text look closer to the standard set by black-and-white e-readers. However, it's important to note that these are manufacturer claims, and independent testing will be needed to verify them.

For now, Kaleido 4 is only available on the Hanvon Technology M10 C II, a China-only E Ink tablet. It may be some time before the technology reaches global brands like Amazon, Kobo, Boox, or ViWoods. Amazon recently launched a new Kindle Colorsoft model, so a refresh with Kaleido 4 is unlikely in the near term.

TechRadar's take is that while the improvements sound comprehensive, color e-readers still face an uphill battle in winning over users who prioritize reading comfort and value. The hope is that global brands will adopt Kaleido 4 soon, potentially making future color e-readers more compelling.

As with any new display technology, the real-world performance will be the true test. E Ink's claims are promising, but readers should wait for hands-on reviews before getting too excited.