E Ink

E Ink screens require hundreds of milliseconds for each refresh, far slower than the millisecond-level response of LCD screens.

The bistable nature of e-ink screens allows battery life to last for several weeks.

E Ink screens use a reflective display principle, relying on ambient light reflection rather than active emission, which fundamentally eliminates blue light and screen flicker issues.

E Ink has officially released its new-generation Kaleido 4 color e-paper technology.

In its release information, E Ink emphasized that Kaleido 4 still maintains the low power consumption characteristics of e-paper.

Kaleido 4 has improvements over Kaleido 3 in three areas: color saturation, refresh speed, and contrast.

The color e-reader products from Kobo, PocketBook, and Boox, as well as the screen solution of the Amazon Kindle Colorsoft, are all based on E Ink Kaleido series technology.

The screen solution used by the Amazon Kindle Colorsoft is a custom E Ink version, with the custom name Saffron, and the core technical principle is still based on Kaleido's color filter architecture.

The E Ink Gallery series uses a microcup structure and requires no color filter layer, so its theoretical color saturation is higher, but its refresh speed is extremely slow, its cost is high, and its yield is low.

Because of slow refresh speed, high cost, and low yield, the Gallery series is mainly used in scenarios such as electronic shelf labels and public displays, and is rarely used in consumer e-readers.

By virtue of its cost and yield advantages, Kaleido firmly occupies the mid-range color e-reader market.

E Ink's technology usually takes months from release to the launch of end products.

The Xteink X4 Pro is equipped with a 4.26-inch, 800 x 480 resolution E Ink electronic ink screen.

E-ink screens are not suitable for watching video content such as YouTube, while the inner screen of a foldable phone requires a high-refresh-rate color display.

E-ink screens are inherently slower to respond than LCD or OLED screens because they require an electric field to physically rearrange charged particles inside microcapsules.

Embedding AI agents into e-ink screens is a new direction that only became feasible after the widespread adoption of low-power edge inference chips.

Sample projects provided by Meta include loading Muse onto a color e-ink screen to display reminders.

E Ink screens have long been the mainstream display choice for e-book readers and electronic price tags.

Bezel-less design has long been prevalent in smartphones, but has been slow to arrive on e-readers because the characteristics of e-ink screen modules and low production volumes make the process costs higher.

E-ink screens can last for weeks on a single charge; the screen does not actively emit light and relies on ambient light or a built-in front light for reading.