Electronic paper
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Electronic paper, also known as electronic ink (e-ink) or intelligent paper, is a display device that mimics the appearance of ordinary ink on paper. Unlike conventional flat panel displays that emit light, an electronic paper display reflects ambient light, like paper. This may make them more comfortable to read, and provide a wider viewing angle than most light-emitting displays. The contrast ratio in electronic displays available as of 2008 approaches newspaper, and newly developed displays are slightly better. An ideal e-paper display can be read in direct sunlight without the image appearing to fade.
Many e-readers, devices meant to replace traditional books, utilize electronic paper for their displays in order to further resemble paper books; one such example is the Kindle series by Amazon.
Macro photograph of Kindle 3 screen; microcapsules are evident at full size.
The Motorola F3 uses an e-paper display instead of an LCD.
iLiad e-book reader equipped with an e-paper display visible in the sunlight
Display device
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A display device is an output device for presentation of information in visual or tactile form. When the input information that is supplied has an electrical signal the display is called an electronic display.
Nixie tubes, LED display and VF display, top to bottom
Display board at Frankfurt (Main) Hauptbahnhof (2005)
Digital clocks display changing numerals