Browse Definitions :
Definition

twisted nematic display (TN display)

Contributor(s): Chiou-Shann Fuh

A twisted nematic (TN) display is a common type of liquid-crystal display ( LCD ) that consists of a substance called a nematic liquid crystal that is confined between two plates of polarized glass.

The TN display takes advantage of the ability of the nematic substance to rotate the polarization of light beams passing through it. Two polarizing filters, parallel planes of glass with their polarizing lines oriented at right angles with respect to each other, are positioned on either side of the liquid crystal. When light enters the display, it is polarized by the input filter. In the absence of an electric field, all the incoming light is transmitted. This is because the light polarization is rotated 90 degrees by the nematic liquid crystal, and the light therefore passes easily through the output filter, which is oriented to match the 90-degree shift.

With the application of a voltage , an electric field is produced in the nematic liquid crystal . Under these conditions the polarization effect is reduced. If the voltage is large enough, the polarization effect disappears altogether, and the light is blocked by the output polarizing filter.

Most TN displays have a characteristic black-on-gray or black-on-silver appearance, and are suitable for use in alphanumeric readouts such as those found in wristwatches, cell phone displays, and some calculator displays. The high-resolution LCD panels typically found in handheld and notebook computers use a different technology.

This was last updated in March 2011

Join the conversation

1 comment

Send me notifications when other members comment.

Please create a username to comment.

hello sir, i want to buy a laptop so i was googling info about laptop & found 2 possible best buys, a laptop have a "HD BrightView LED Backlit Wide Screen Display " with resolution of 1366 x 768 Pixels, another one having a "Full HD TN GL Slim Display" with resolution of 1920x1080 pixels. Can you please provide me a comparison between these two display technologies..?? which is best in term of reliability, durability and please explain other aspects while considering these technologies..!!!!! i will be very thankfull to you ..
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • regulatory compliance

    Regulatory compliance is an organization's adherence to laws, regulations, guidelines and specifications relevant to its business...

  • privacy compliance

    Privacy compliance is a company's accordance with established personal information protection guidelines, specifications or ...

  • data governance policy

    A data governance policy is a documented set of guidelines for ensuring that an organization's data and information assets are ...

SearchSecurity

SearchHealthIT

  • telemedicine (telehealth)

    Telemedicine is the remote delivery of healthcare services, such as health assessments or consultations, over the ...

  • Project Nightingale

    Project Nightingale is a controversial partnership between Google and Ascension, the second largest health system in the United ...

  • medical practice management (MPM) software

    Medical practice management (MPM) software is a collection of computerized services used by healthcare professionals and ...

SearchDisasterRecovery

SearchStorage

  • megabytes per second (MBps)

    Megabytes per second (MBps) is a unit of measurement for data transfer speed to and from a computer storage device.

  • zettabyte

    A zettabyte is a unit of measurement used by technology professionals and the general public to describe a computer or other ...

  • hybrid flash array

    A hybrid flash array is a solid-state storage system that contains a mix of flash memory drives and hard disk drives.

Close