A flexible 2.1‐in. active‐matrix electrophoretic display with high resolution and a thickness of 100 μm

Abstract

Abstract— A paper‐thin QVGA, flexible 2.1‐in. active‐matrix electrophoretic display (AMEPD) that features 100‐μm thick and a 192‐ppi resolution has been developed. An LTPS‐TFT backplane with integrated peripheral driver circuits was first fabricated on a glass substrate and then transferred to a very thin (30‐μm) plastic film by employing surface‐free technology by laser ablation/annealing (SUFTLA®). A micro‐encapsulated electrophoretic imaging sheet was laminated on the backplane. A supporting substrate was used to support the LTPS‐TFT backplane. Fine images were successfully displayed on the rollable AM‐EPD. The integrated driver circuits dramatically reduce the number of external connection terminals, thus easily boosting the reliability of electrical connections even on such a thin plastic film.

Ambient Electronics

“…Motivated by these advantages, many researchers, mainly in industries, are intensively researching flexible displays for practical applications. [70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86] Display elements include organic LED and electrophoretic devices, which can exhibit flexibility through control by TFT drive circuits fabricated on plastic films. Thus far, many flexible displays and electronic papers with excellent definition, luminescence, and other characteristics have been reported.…”

“…Thus far, many flexible displays and electronic papers with excellent definition, luminescence, and other characteristics have been reported. [70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86] For example, Ricoh Co., Ltd., has reported all-printed high-definition displays with a definition of 200 ppi, 82) Dai Nippon Printing Co., Ltd., have developed color flexible organic LED displays, 83) and Toppan Printing Co., Ltd., have realized large high-definition electrophoretic flexible displays. 84) Focusing on flexibility, TFT-driven organic LED fullcolor displays that can be rolled into a cylinder with the diameter of a pencil were reported by Kazumasa Nomoto of Sony Corporation and colleagues in 2010, which surprised many people and is still a fresh memory.…”

22.1: Invited Paper: Stretchable and Foldable Displays using Organic Transistors with High Mechanical Stability

“…The smallest bend radii that inorganic and organic field-effect transistors have been reported to withstand thus far is 500 µm [1][2][3][4][5]. While this might suffice for wrapping displays or sensors around a sizeable object [1,2], much smaller bend radii are required to withstand repeated crumpling, creasing, or sharp folding. Ideally, transistors and circuits should exhibit not only stability against extreme bending but also have good electrical performance characteristics such as large carrier field-effect mobility and low operating voltage.…”

P‐114: A Novel Curved LCD with Highly Durable and Slim Profile

“…To fill those requirements, the display should be flexible to some degree. The ways to flexible display panel with plastic or foil substrates are well known [1][2][3][4][5], while thin glass substrates have flexibility, too. General thin glasses can be available for curved panel but cannot be rolled.…”