Planarization coating for polyimide substrates used in roll-to-roll fabrication of active matrix backplanes for flexible displays

2012 ◽  
Author(s):  
A. Marcia Almanza-Workman ◽  
Albert Jeans ◽  
Steve Braymen ◽  
Richard E. Elder ◽  
Robert A. Garcia ◽  
...  
Keyword(s):  
Flexible Displays ◽  
Active Matrix ◽  
Roll To Roll

Amoled Tft Pixel Circuitry for Flexible Displays on Metal Foils

2003 ◽  
Vol 769 ◽  
Author(s):  
Matias Troccoli ◽  
Themis Afentakis ◽  
Miltiadis K. Hatalis ◽  
Apostolos T. Voutsas ◽  
Masahiro Adachi ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Steel Substrate ◽  
Metal Foil ◽  
Flexible Displays ◽  
Active Matrix ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Metal Foils ◽  
Organic Light ◽  
Novel Approach

AbstractActive matrix organic light emitting diode displays based on thin, flexible metal foil substrates offer a novel approach to fabricate light, flexible and rugged displays. Metal foils allows devices to be fabricated at higher process temperatures yielding better device characteristics than plastic substrates. Furthermore, the conductive nature of such substrates enables more efficient use of pixel area through the use of a global power electrode. We are implementing Active Matrix Organic Light Emitting Diode (AMOLED) displays on flexible stainless steel substrate using 2 TFT and 4 TFT pixel circuit topologies with two different layout realizations that exploit the conductive properties of the substrate.

Flexible Plastic Liquid Crystal Displays

2001 ◽  
Vol 709 ◽  
Author(s):  
John L. West ◽  
Greg R. Novotny ◽  
Michael R. Fisch ◽  
David Heineman
Keyword(s):  
Liquid Crystal ◽  
Mechanical Performance ◽  
Polymer Networks ◽  
Liquid Crystal Displays ◽  
Full Potential ◽  
Transfer Printing ◽  
Flexible Displays ◽  
Roll To Roll ◽  
Critical Issues ◽  
Printing Techniques

ABSTRACTFlexible plastic liquid crystal displays (LCDs) offer a number of advantages over traditional glass displays. Roll-to-roll manufacturing of such displays makes possible large size, inexpensive displays. While this type of manufacturing is still in the future, here we report solutions of some of the pressing problems needed to achieve this goal. We utilize liquid crystal effects that do not require polarizers and can therefore utilize commercially available, birefringent substrates such as polyesters and polyethylene terephthalate. We achieve excellent optical and mechanical performance of these flexible displays, even when bent, by creating polymer networks and polymer walls that adhere the front and back substrates and maintain uniform spacing between the substrates. Roll-to-roll processing of flexible plastic displays also requires that the photolithographic techniques used to pattern the electrodes on the current glass LCD’s be replaced by printing techniques and the development of techniques to rapidly etch unwanted electrode material. We must also develop and optimize techniques for rapidly forming polymer walls. Here we report methods of patterning ITO electrodes on flexible plastic substrates using conventional wax transfer printing techniques and rapid etching and cleaning techniques. We also report experiments that elucidate the basic science of rapidly forming polymer walls. We combine these new achievements and understanding and demonstrate their utility by fabricating a flexible plastic LCD using techniques compatible with roll-to-roll manufacturing. Finally, we discuss the critical issues that must be addressed if flexible plastic LCD’s are to reach their full potential.

scholarly journals Proving Scalability of an Organic Semiconductor To Print a TFT-Active Matrix Using a Roll-to-Roll Gravure

ACS Omega ◽  
2017 ◽  
Vol 2 (9) ◽  
pp. 5766-5774 ◽  
Author(s):  
Junfeng Sun ◽  
Hyejin Park ◽  
Younsu Jung ◽  
Grishmi Rajbhandari ◽  
Bijendra Bishow Maskey ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
Active Matrix ◽  
Roll To Roll

23.4: Invited Paper: Active-Matrix Backplanes Produced by Roll-to-Roll Self-Aligned Imprint Lithography (SAIL)

2008 ◽  
Vol 39 (1) ◽  
pp. 322 ◽  
Author(s):  
Warren B. Jackson ◽  
Marcia Almanza-Workman ◽  
Alison Chaiken ◽  
Robert A. Garcia ◽  
Albert Jeans ◽  
...  
Keyword(s):  
Imprint Lithography ◽  
Active Matrix ◽  
Roll To Roll

Roll-to-Roll Manufacturing of Flexible Displays

2005 ◽  
pp. 409-445 ◽  
Author(s):  
Abbie Gregg ◽  
Lara York ◽  
Mark Strnad
Keyword(s):  
Flexible Displays ◽  
Roll To Roll

scholarly journals A fully roll-to-roll gravure-printed carbon nanotube-based active matrix for multi-touch sensors

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Wookyu Lee ◽  
Hyunmo Koo ◽  
Junfeng Sun ◽  
Jinsoo Noh ◽  
Kye-Si Kwon ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Active Matrix ◽  
Roll To Roll

scholarly journals Numerical Study on the Optimization of Roll-to-Roll Ultraviolet Imprint Lithography

Coatings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 573
Author(s):  
Usama Tahir ◽  
Muhammad Ahmad Kamran ◽  
Myung Yung Jeong
Keyword(s):  
Numerical Model ◽  
Numerical Study ◽  
Low Cost ◽  
Industrial Applications ◽  
Contact Angles ◽  
Large Area ◽  
Flexible Displays ◽  
Roll To Roll ◽  
Area Functional ◽  
Uv Resin

Roll-to-roll ultraviolet (R2R-UV) imprinting is a low-cost and high-throughput method that includes the manufacturing of large-area functional films. However, the quality of the final product is obstructed by the bubble entrapment during the imprinting process. In this study, a multi-phase volume of fluid (VOF) numerical model was used to remove bubble entrapment during the R2R imprinting process, which covered all parameters. This new modified numerical model with open-channel boundary conditions was based on the single zone that contains the direct contact of UV resin with the imprinting mold during the filling process. In addition, this model simulated the UV resin filling into microcavities at the preceding and succeeding ends of the imprinting mold. Different patterns of imprinting mold were considered to enhance the fidelity of R2R-UV imprinting for the comprehensive analysis. The experimental results validated through numerical simulations revealed that the bubble entrapment can be controlled by varying various parameters such as speed of the imprinting system, viscosity, contact angles, and pattern shape. The proposed model may be useful for a continuous bubble-free R2R imprinting process in industrial applications that includes flexible displays and micro/nano-optics.

An Amorphous IGZO Rare Earth Doped Luminescent Phosphor

2008 ◽  
Vol 1111 ◽  
Author(s):  
Patrick Wellenius ◽  
Arun Suresh ◽  
John F. Muth
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
High Performance ◽  
Amorphous Material ◽  
High Electron ◽  
Indium Gallium Zinc Oxide ◽  
Flexible Displays ◽  
Active Matrix ◽  
Rare Earth Doped ◽  
Recent Attention

AbstractIndium gallium zinc oxide (IGZO) has attracted recent attention as a high electron mobility amorphous material for high performance thin film transistors and subsequent use in active matrix backplanes for flexible displays. In this study, Eu:IGZO thin films were pulsed laser deposited at room temperature onto sapphire substrates and were investigated by cathodoluminescence and optical transmission. Photoluminescence was not observed with above band gap excitation. Thin film electroluminescent (TFEL) devices were also fabricated from these thin films. The thin films and devices demonstrate characteristic europium emission, with the most intense emission at 611 nm corresponding to the 5D0 to 7F2 transition. Luminescence was observed to increase with increasing oxygen pressure during deposition of the Eu:IGZO thin films and may be related to the free carrier density in the films. The authors believe this to be the first report of an amorphous oxide electroluminescent phosphor.

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