Pen drawing display

Sang-Mi Jeong,Sanghyun Ju,Jeeyin Park,Chang-Yeol Han,Taekyung Lim,Heesun Yang

doi:10.1038/s41467-019-12395-z

Pen drawing display

Sang-Mi Jeong, Sanghyun Ju + Show 4 more

Open Access

https://doi.org/10.1038/s41467-019-12395-z

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Journal: Nature Communications	Publication Date: Sep 24, 2019
Citations: 15	License type: open-access

Affiliation: Kyonggi University, Hongik University

Abstract

As advancements in science and technology, such as the Internet of things, smart home systems, and automobile displays, become increasingly embedded in daily life, there is a growing demand for displays with customized sizes and shapes. This study proposes a pen drawing display technology that can realize a boardless display in any form based on the user’s preferences, without the usual restrictions of conventional frame manufacturing techniques. An advantage of the pen drawing method is that the entire complex fabrication process for the display is encapsulated in a pen. The display components, light-emitting layers, and electrodes are formed using felt-tip drawing pens that contain the required solutions and light-emitting materials. The morphology and thickness of each layer is manipulated by adjusting the drawing speed, number of drawing cycles, and substrate temperature. This study is expected to usher in the upcoming era of customized displays that can reflect individual user needs.

Highlights

As advancements in science and technology, such as the Internet of things, smart home systems, and automobile displays, become increasingly embedded in daily life, there is a growing demand for displays with customized sizes and shapes
Representative OLED and QD-LED displays usually consist of an anode, a hole injection layer (HIL), a hole transfer layer (HTL), an emission layer (EML), an electron transfer layer (ETL), an electron injection layer (EIL), and a cathode[16,17,18]
Pencils, fountain pens, and ball pens with various tip shapes, felt-tip pens facilitate the formation of a display with QDs and electrode solutions owing to their porous writing surface composed of pressed and layered fibers

Summary

Introduction

As advancements in science and technology, such as the Internet of things, smart home systems, and automobile displays, become increasingly embedded in daily life, there is a growing demand for displays with customized sizes and shapes. Thermal deposition and spin-coating methods are used to form light-emitting functional layers, such as the HIL, HTL, EML, ETL, and EIL, while thermal, electron-beam, and sputtering evaporation methods are used to form the anode and cathode These methods provide reliable thin film quality with respect to luminance and current efficiency characteristics, they require a pixel patterning process based on a shadow mask or photolithography. A solution-based pen-drawing method has the advantage of forming a free-style display pattern without being restricted to the conventional rectangular shape on the substrate. It allows fabrication on a flexible plastic or paper substrate as well as on a rigid glass substrate. The performance of the fabricated pendrawing display is demonstrated on glass, plastic, and paper substrates

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