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U.D Card / Stored value cards

U.D Card
U.D Card

U.D Card is a value card that could show the card amount. U.D card has two ways to appear card amount. First, for universal the card serves to appear the amount on electronic paper screen. Second, for blind person the card would appear by braille. It is very province electricity because it only used electricity when the card amount changes.

University

National Cheng Kung University

National Cheng Kung University
Tainan, Taiwan

Wei-Jhih Jhao,
National Cheng Kung University