A rollable display is a flexible display device

Display device

A display device is an output device for presentation of information in visual or tactile form...

 which can be rolled up into a scroll

Scroll

A scroll is a roll of parchment, papyrus, or paper, which has been drawn or written upon.Scroll may also refer to:*Scroll , the decoratively curved end of the pegbox of string instruments such as violins...

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Technologies involved in building a rollable display include electronic ink, Gyricon

Gyricon

Gyricon is a type of electronic paper developed at the Xerox PARC . It has many of the same properties as paper: It's flexible, contains an image, and is viewable from a wide angle, but it can be erased and written thousands of times....

, and OLED

Organic light-emitting diode

An OLED is a light-emitting diode in which the emissive electroluminescent layer is a film of organic compounds which emit light in response to an electric current. This layer of organic semiconductor material is situated between two electrodes...

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Electronic paper

Electronic paper

Electronic paper, e-paper and electronic ink are a range of display technology which are designed to mimic the appearance of ordinary ink on paper. Unlike conventional backlit flat panel displays, electronic paper displays reflect light like ordinary paper...

 displays which can be rolled up have been developed by E Ink

E Ink Corporation

E Ink Corporation is a privately held manufacturer of electrophoretic displays , a kind of electronic paper. E Ink is located in Cambridge, Massachusetts, and was co-founded in 1997 by Joseph Jacobson, a professor in the MIT Media Lab. Two years later, E Ink partnered with Philips to develop and...

. At the CES 2006

Consumer Electronics Show

The International Consumer Electronics Show is a major technology-related trade show held each January in the Las Vegas Convention Center, Las Vegas, Nevada, United States. Not open to the public, the Consumer Electronics Association-sponsored show typically hosts previews of products and new...

, Philips

Philips

Koninklijke Philips Electronics N.V. , more commonly known as Philips, is a multinational Dutch electronics company....

 showed a rollable display prototype whose screen can retain an image for several months without electricity. As of 2007 Philips Polymer Vision expected to launch a 5 inches (127 mm), 320 x 240-pixel

Pixel

In digital imaging, a pixel, or pel, is a single point in a raster image, or the smallest addressable screen element in a display device; it is the smallest unit of picture that can be represented or controlled....

 resolution rollable display based on E Ink’s electrophoretic technology

E Ink

E Ink is a specific proprietary type of electronic paper manufactured by E Ink Corporation, founded in 1997 based on research started at the MIT Media Lab...

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Some flexible organic light-emitting diode

Flexible organic light-emitting diode

A flexible organic light emitting diode is a type of organic light-emitting diode incorporating a flexible plastic substrate on which the electroluminescent organic semiconductor is deposited. This enables the device to be bent or rolled while still operating...

 displays have been demonstrated.
Perhaps the first commercially sold flexible display was an electronic paper wristwatch.

A rollable display is an important part of roll-away computer

Roll-away computer

A Roll-away computer is an idea introduced as part of a series by Toshiba in 2000, which aimed to predict the trends in personal computing five years into the future...

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