Patent ID: 11868018
Assignee: THE HONG KONG RESEARCH INSTITUTE OF TEXTILES AND APPAREL LIMITED
Field: Optics (Instruments)
Classification: CPC G  D  C | IPC C  D  G

Claim 6:
7. A method indicating a presence of hydrogen, lithium and/or sodium ions in an external environment, the method comprising the following steps:
actively or passively bringing the textile product of claim 1 into contact with an external liquid containing hydrogen, lithium and/or sodium ions, the ion storage layer on the ion storage yarn absorbing the hydrogen, lithium and/or sodium ions in the external liquid, wherein the external liquid is said material capable of conducting the hydrogen, lithium, and/or sodium ions; and
switching the polarity of the voltage applied to the ion storage yarn with that applied to the electrochromic yarn in order to release the absorbed hydrogen, lithium and/or sodium ions from the ion storage layer to the electrochromic layer, thereby changing colors of the electrochromic yarn and the woven pattern.