Abstract

A screen-printed electroluminescent (EL) digital watch display on fabric is presented. This paper demonstrates the process of creating interactive printed smart fabrics suitable for a broad range of applications. In order to control the display, a series of tracks were printed that are 400 μm wide with a pitch of 1 mm; these dimensions are lower than the previously reported literature for connections to an EL lamp. An optimized design for a bus bar layer is designed, modeled, and tested. The design improvement reduces the amount of the emitting area covered by an opaque conductor and is shown to have no negative impact on the function of the EL lamp. The design for the EL watch display includes 28 EL lamps on fabric forming four seven-segment displays. The display is the first demonstration of multiple EL seven-segment displays on fabric. The brightness is characterized and compared to commercially available blue EL lamps. The watch segments had similar brightness to commercially available lamps.

© 2016 IEEE

Improvement in angular color uniformity of white light-emitting diodes using screen-printed multilayer phosphor-in-glass

Simin Wang, Xing Chen, Mingxiang Chen, Huai Zheng, Hongru Yang, and Sheng Liu
Appl. Opt. 53(36) 8492-8498 (2014)

Volumetric display with holographic parallel optical access and multilayer fluorescent screen

Kota Kumagai, Daichi Suzuki, Satoshi Hasegawa, and Yoshio Hayasaki
Opt. Lett. 40(14) 3356-3359 (2015)

Schematic design of a complex thin-film luminescent screen usable for vacuum fluorescent and field emission display

Suling Zhao, Zheng Xu, Fujun Zhang, Weiwei Jiang, Jinzhao Huang, Yongsheng Wang, and Xurong Xu
Opt. Lett. 32(15) 2094-2096 (2007)

Perspective on synthesis, device structures, and printing processes for quantum dot displays

Jaehoon Lim, Wan Ki Bae, Jeonghun Kwak, Seonghoon Lee, Changhee Lee, and Kookheon Char
Opt. Mater. Express 2(5) 594-628 (2012)

Electroluminescent devices with function of electro-optic shutter

Seongkyu Song, Jaewook Jeong, Seok Hwan Chung, Soon Moon Jeong, and Byeongdae Choi
Opt. Express 20(19) 21074-21082 (2012)