Browse Definitions:
Definition

electronic paper display (EPD)

Contributor(s): Bill Donlan

An electronic paper display (EPD) is an electrically-charged surface that replicates the look and experience of ink on paper. 

EPDs are extremely thin and only require power when a new image is requested. Instead of a traditional display that uses backlighting to illuminate pixels, an EPD is based on the scientific phenomena known as "electrophoresis," the movement of electrically charged molecules in an electric field.   

Different manufacturers use closely-guarded methods to encapsulate the molecules and apply them to a substrate. E Ink, for instance, uses positively charged white particles and negatively charged black particles suspended in a clear encapsulated fluid. To form an electronic display, the encapsulated "ink" is printed onto a sheet of plastic film that is laminated to a layer of circuitry. The circuitry forms a pattern of pixels that can be controlled by a display driver

When a negative electric field is applied, the white particles move to the top of the capsule, where they become visible to the user. This makes the surface appear white at that spot. At the same time, an opposite electric field pulls the black particles to the bottom of the capsules, where they are hidden. By reversing this process, the black particles appear at the top of the capsule and the surface appears dark at that spot.

EPDs are ideal for many consumer and industrial applications, including eNewspapers, smart cards, electronic shelf labels, transportation signage, eBook readers and cell phone screens. Esquire Magazine will run the first EPD magazine cover in its 75th anniversary issue in September 2008. 

 

Learn more about IT:

> David DeJean wrote about the future of e-paper and electronic paper displays for Computerworld.
> Wikipedia's entry for electronic paper sheds more light on the future and technical background of EPDs.
> E Ink manufactures electronic paper displays.

This was last updated in June 2010

Join the conversation

1 comment

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

please add a download option for following stuff
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

SearchSecurity

  • phishing

    Phishing is a form of fraud in which an attacker masquerades as a reputable entity or person in email or other communication ...

  • vulnerability disclosure

    Vulnerability disclosure is the practice of publishing information about a computer security problem, and a type of policy that ...

  • incident response

    Incident response is an organized approach to addressing and managing the aftermath of a security breach or cyberattack, also ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity and disaster recovery (BCDR)

    Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

SearchStorage

  • flash memory

    Flash memory, also known as flash storage, is a type of nonvolatile memory that erases data in units called blocks.

  • NAND flash memory

    NAND flash memory is a type of nonvolatile storage technology that does not require power to retain data.

  • NOR flash memory

    NOR flash memory is one of two types of nonvolatile storage technologies.

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close