Printed electronics is a compilation of significant developments that have contributed to changing the traditional perception of printing using paper. Printed electronics is characterized by employing common printing techniques, such as inkjet, gravure and screen printing, to print special functional inks on low-cost materials, such as plastic, paper and glass. These techniques open the doors for a wide range of low-cost manufacturing applications from flexible displays, transistors, RFID tags to interactive cloth.This paper summarizes the overall developments of Printed electronics and then focus on Electronic paper (or E-paper) as one of its applications. In particular, this paper talks about what parts of printed electronic developments that contribute to the developments of this promising flexible display that mimics papers properties in terms of flexibility and readability and can update its contents via wireless connections.