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Video on e-books with color ink

28.11.2020

E-readers with E Ink displays have led to a new and extremely convenient class of reading devices in any environment, day or night. The only thing they were unable to do was video playback. The E Ink screen refreshes too slowly. With color, too, it does not add up yet, but video is clearly not the strong point of this technology. The Chinese promise to fix this, and the old Philips research helps them in this.

South China Normal University (SCNU) announced the progress in the development of color reflective displays with the ability to show video. Back in 2012, a group for the development of "paper" displays was created as part of the university, led by former Philips engineers. Later, the team began working with a local company, Shenzhen Guohua Optoelectronics Ltd, which is likely to commercialize the development.

To date, the efforts of E Ink and other companies that have tried to create an alternative technology for reflective displays in terms of color reproduction and video playback have not led to anything sensible, and two of the most promising technologies - Mirasol and Liquavista - have completely sunk into oblivion. Or not? The most striking thing about the new development of the Chinese is that it is the electrowetting technology brought to mind, which the Dutch Liquavista tried to exploit. However, there is nothing to be surprised here. Liquavista and new Chinese achievements are based on the same developments of Philips researchers.

Liquavista went out of business in 2013. China picked up the banner that fell from its hands and now promises to release a commercial product in 2021. These can be portable devices for reading and watching videos that can work for weeks on autonomous power, like regular e-readers on E Ink. But unlike book readers, video on them is played at a high frame rate.

At the moment, the developers show two color reflective displays and two monochrome ones, in particular, a 5,8-inch color screen. It is reported to show bright colors in sunlight with good levels of contrast and reflection. The display uses three standard printing colors - cyan, magenta and yellow - to generate color, therefore, as stated, the image quality approaches print. Of the other declared characteristics, you can voice the contrast level - 10:1 (about the same as black and white E Inks) and 40% reflectivity, which is also close to the performance of conventional E Inks.

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