E Ink announced a new iteration of its Kaleido color e-paper technology, addressing several limitations of the existing Kaleido 3 displays currently used in e-readers and tablets from manufacturers including Kobo, PocketBook, and Boox. Amazon’s Kindle Colorsoft incorporates a customized version of Kaleido 3 technology. The upgraded Kaleido 4 addresses performance shortcomings through enhancements to color reproduction, contrast levels, and screen refresh speeds.
Kaleido 3 screens use a color filter layer positioned over a black-and-white e-paper panel to generate color images. While this approach enables faster refresh rates compared to alternative color e-paper technologies, it produces images with limited color palette and lower resolution relative to text display. Additionally, the color filter darkens plain text compared to standard monochrome E Ink screens. E Ink’s alternative Gallery 3 technology, found in devices like the Remarkable Paper Pro, uses mobile colored pigments to create full-color images but suffers from slower refresh rates that can impact user experience.
The Kaleido 4 technology doubles the color gamut volume of its predecessor and increases white reflectance by 15 percent while improving contrast by 50 percent, potentially reducing text visibility issues present in Kaleido 3 displays. However, the technology remains limited to approximately 4,096 colors—substantially fewer than modern LCD and OLED screens—and maintains lower resolution for colors compared to text rendering. A new oxide thin-film transistor backplane enables faster performance, with refresh rates reaching 18 frames per second, allowing the screens to display video content.
Handset manufacturer Hanvon Technology will be the first to implement Kaleido 4 technology in its upcoming M10C II tablet device. The tablet will feature a micro-etched tempered-glass surface designed to minimize glare and enhance the paper-like tactile experience when using a battery-free stylus for note-taking. The device will initially launch in China. Major manufacturers including Amazon and Kobo have not yet unveiled products incorporating the new Kaleido 4 display technology.
Article Attribution | Read More at Article Source
Article summary produced by Claude AI