Because we all are just dying for E Ink to hurry up and deliver us a full-fledged colored e-paper displays, we can't help but mention this patent the company has been recently awarded. Patent
US 7075502 was originally filed in 1999 and describes "a full color, reflective display having superior saturation and brightness" which is achieved "with a novel display element comprising multichromatic elements."
Quote:
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One embodiment of the display employs three sub-pixels, each sub-pixel comprising a capsule including three species of particles which differ visually. Another embodiment of the display employs color filters combined with an encapsulated electrophoretic display to provide different visual states. In still another embodiment, the display employs display elements capable of more than three visual states. In yet another embodiment, the visual display states are selected from specific colors, for example, the primary colors red, green and blue, or their complements, and white and/or black. The display element presents a visual display in response to the application of an electrical signal to at least one of the capsules.
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Unlike today's displays from E Ink, which are all based on bichromatic electrophoretic elements capable of displaying various shades of gray, the invention described here could deliver us full-color with the same sweet attributes: flexible, bistable, high brightness and high contrast ratios.
Related: E Ink goes color with new advanced electronic paper