Editing Smart card (section)

=====Display=====

Displaying data is an essential part of Complex Card functionalities. Depending on the information that needs to be shown, displays can be digital or alphanumeric and of varying lengths. Displays can be located either on the front or back of the card. A front display is the most common solution for showing information such as a One-Time Password or an electronic purse balance. A rear display is more often used for showing a Dynamic Card Security Code (DCSC).

Displays can be made using two technologies: 
* [[Liquid-crystal display]] (LCD) : LCDs are easily available from a wide variety of suppliers, and they are able to display either digits or alphabetical data. However, to be fitted in a complex smart card, LCDs need to have a certain degree of flexibility. Also, LCDs need to be powered to keep information displayed. 
* [[Liquid-crystal display#"Zero-power" (bistable) displays|Bistable displays]], also known as [[Ferroelectric liquid crystal display]]s, are increasingly used as they only require power to refresh the displayed information. The displayed data remains visible, without the need for of any power supply. Bistable displays are also available in a variety of specifications, displaying digits or pixels. Bistable displays are available from E Ink Corporation<ref>{{cite web |title=E Ink |url=https://www.eink.com/index.html |website=E Ink |access-date=12 June 2021 |archive-date=30 July 2021 |archive-url=https://web.archive.org/web/20210730164908/https://www.eink.com/index.html |url-status=live }}</ref> among others.