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Issue 19, 2009
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Thin, lightweight, foldable thermochromic displays on paper

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Abstract

This article describes an electronic display that is fabricated by patterning electrically conductive wires (heaters) with micron-scale dimensions on one side of a sheet of paper, and thermochromic ink on the opposite side. Passing electrical current through the wires heats the paper and changes the thermochromic ink from colored (black, green, or other colors) to transparent; this change in property reveals the paper underneath the ink—exposing any messages printed on the paper—and serves as the basis for a two-state “shutter” display. This type of display is thin (100 µm), flat, lightweight (the display weighs <20 mg/cm2), can be folded, rolled, twisted, and creased while maintaining function, and ultimately can (if required) be disposed of by incineration. The display is appropriate for applications where information must be presented clearly (usually only once) for little cost (each display costs <$0.10/m2 in materials) and where limited electrical power is available.

Graphical abstract: Thin, lightweight, foldable thermochromic displays on paper

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Article information


Submitted
23 Mar 2009
Accepted
11 Jun 2009
First published
23 Jun 2009

Lab Chip, 2009,9, 2775-2781
Article type
Paper

Thin, lightweight, foldable thermochromic displays on paper

A. C. Siegel, S. T. Phillips, B. J. Wiley and G. M. Whitesides, Lab Chip, 2009, 9, 2775
DOI: 10.1039/B905832J

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