Soft Electrochromic Yarn with Low Operating Voltage

HKRITA
Overview

This project has developed a novel and sustainable way of fabricating a soft electrochromic yarn for use in a numeric textile display prototype. It has considerable potential to address the problems in the wearable display market.

  • Soft Electrochromic Yarn with Low Operating Voltage 0
  • Soft Electrochromic Yarn with Low Operating Voltage 1
Technical name of innovation
Soft Electrochromic Yarn with Low Operating Voltage
Research completion
2021
Commercialisation opportunities
Technology licensing
Problem addressed

Both optical fibres and coating electrochromic materials are not suitable for producing textile products. Optical fibres are high energy-consuming and rigid, while coating electrochromic materials used in these research projects are hard and toxic for human skin. Fabrics with coating electrochromic materials also fail to obtain pixels small enough for display.

Innovation
  • Soft yarn suitable for displaying information on clothes with an APP to control the displayed information
  • A non-toxic coating solution mixing tungsten powder in peroxide solution for yarn that can achieves high colour change efficiency 
  • Enhancing the yarn by electroplating so that the yarn is electrochromic and with low-operating voltage and thus energy-saving achieved
Key impact
  • A breakthrough in the development of wearable display clothing that overcomes the drawbacks of optical fibres and coating electrochromic materials
  • A soft and eco-friendly alternative raw material for wearable display clothing; these yarns can be widely and easily used in the textile industry
Award
  • Gold Medal in the Special Edition 2021 Inventions Geneva Evaluation Days
Application
  • Wearable display
The Hong Kong Research Institute of Textiles and Apparel (HKRITA)

Established in 2006, The Hong Kong Research Institute of Textiles and Apparel (HKRITA) is funded by the Innovation and Technology Commission of the HKSAR government, and hosted by The Hong Kong Polytechnic University. 

HKRITA has achieved research deliverables over the years around our research clusters targeting in sustainability, industry advancement and social benefits through our centre-owned research teams and laboratories as well as collaborations with industry partners and institutions. 

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