E Ink

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Developed by the MIT Media Lab, E Ink technology is proprietary to E Ink Corporation and allows for a new generation of battery-powered portable e-book readers to display text and graphics with a high resolution, while not consuming power to maintain the display. Tiny black particles represent the pixels by their proximity to the surface of the screen. Near the screen, they are seen as a small black dot, much like the screen process for printing black and white photographs. This technology allows portable readers, such as the Hanlin V2 and Sony Portable Reader PRS-500 (Early pioneering products), to consume power only when advancing pages, or zooming in or out.

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[edit] How it works

E Ink, uses tiny liquid filled bubbles that contain both white and black "ink". Each bubble represents a pixel on the screen display. Electronic charges are applied to the bubble to bring either the white ink or the black ink to the surface. Once the charge is removed the ink will stay at the surface so it can been seen without any power applied. The bubbles are the same size as a pixel on the screen and the connection of all these bubbles can form text characters and images on the surface of the screen. A positive charge will cause white ink to appear while a negative charge will cause black to appear. A charge can be applied to affect a small portion of the bubble instead of the whole bubble. This can be used to cause a mix of white and black (gray) to appear.

Inkballs3.jpg

[edit] For more information

[edit] Available e-book products

Currently available products that incorporate E Ink High Resolution Displays include:

Samsung Electronics achieved a world's first at the SID event with a largest-ever high resolution E Ink Vizplex imaging film at 40" diagonal - the size of a large flat-screen TV, which consumes very little power: 300mW at one frame per minute, or 1/500 that of a conventional LCD display. Such a display using electronic ink would be appropriate for digital signage and office information applications.

[edit] Available products (other than e-book readers)

Currently available products featuring E Ink Segmented Displays include:

  • ART Technologies, Ltd., Phosphor Innovation Electronic Ink Watch
  • Lexar's Jumpdrive Mercury and Secure Plus II USB memory sticks
  • Funkwerk Information Technologies Karlsfeld GmbH's Pariflex DRFID (bar code Display on a RFID tag) Smartlabel
  • Motorola's MOTOFONE F3, GSM Mobile Phone
  • Seiko G300, Ladies Electronic Ink Fashion Watch
  • Earl is a GPS and survival camping product that could also serve as an eBook Reader and even a Tablet.
  • InkCase is a case for a Smartphone that includes a display on the back.

[edit] Available development kits

Currently available development tools:

[edit] Roadmap

During the Society of Information Display (SID) 2007 E Ink demonstrated their latest advances in e-paper.

"Our research team is demonstrating here an ultra-bright ink that is approaching 50 percent reflectance of ambient light compared to 35 percent in shipping monochrome products," said Dr. Michael McCreary, vice president of Research and Advanced Development at E Ink. "Moreover, the advanced ink is capable of high switching speeds. We have put it all together and today we are unveiling our first-ever color research prototype that can play smooth color video."

The increased contrast screen, 10:1, is now available using the name "E Ink Pearl" to describe the display. More recently E Ink Carta achieves 15:1 or better contrast ratio.

E Ink has a color video prototype with a 6-inch diagonal display with 300x400 resolution and RGBW sub-pixels that is capable of switching at up to 30 frames per second. It is expected that the video switching capability may require several years to reach the market, however the color technology is available now.

E Ink displays can also be in applications with little or no light through the integration of a front light solution. A front light use a very thin light guide material to uniformly disperse light over the entire display. The light source is usually in the form of LEDs mounted in the sides of the display module. E Ink can manufacture the entire display module including the front light.

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