44.3: Flexible Electrophoretic Displays with Jet‐Printed Backplanes

Abstract

Flexible electrophoretic displays are demonstrated using all‐additive solution‐processed active‐matrix backplanes. The conducting traces and the organic semiconductor for the pixel circuit were deposited by inkjet printing. Printed backplanes with smaller pixel size are desirable and the consequences of increasing the display resolution from 37 ppi to 74 ppi are discussed. Novel fabrication approaches for printed multi‐layer pixel designs are presented.

Solution-Processed Organic Thin-Film Transistor Array for Active-Matrix Organic Light-Emitting Diode

“…The inkjet method is often used to prepare a semiconductor layer. [3][4][5][6][7] It is a contactless technique with the substrate, and is therefore suitable for fabrication of semiconductor layers that need high crystallinity. In addition it is an additive and plateless technique; thus, it has features of reduced material waste, low cost, and versatility.…”

High-Performance, All-Solution-Processed Organic Nanowire Transistor Arrays with Inkjet-Printing Patterned Electrodes

“…Recently, considerable attention has been paid to 1D nano/microsize organic single-crystal transistors because of their potential applications as building blocks in the field of electronics owing to their high mobility as a result of high crystallinity. The field effect transistor (FET) mobility of organic nanowires (NWs) has exceeded 2 cm 2 ·V –1 ·S –1 , − which has already met the demand for the transistors to drive the back panels in electrophoretic displays, liquid-crystal displays, and organic light-emitting displays. , However, to put organic NWs in real applications, there are two obstacles that have to be overcome: how to pattern the organic NWs into aligned arrays over large areas and how to make electrodes for such arrays at low temperature with a simple, cost-effective, and scalable process.…”

“…The field effect transistor (FET) mobility of organic nanowires (NWs) has exceeded 2 cm 2 3 V À1 3 S À1 , 1À4 which has already met the demand for the transistors to drive the back panels in electrophoretic displays, liquid-crystal displays, and organic lightemitting displays. 5,6 However, to put organic NWs in real applications, there are two obstacles that have to be overcome: how to pattern the organic NWs into aligned arrays over large areas and how to make electrodes for such arrays at low temperature with a simple, cost-effective, and scalable process.…”

Pressure sensors for printed blast dosimeters

“…We have previously used inkjet printing to fabricate active-matrix transistor backplanes for reflective displays such as electronic paper [1,2]. Here, we apply a related technology towards printed sensor systems.…”