Highly Efficient, Flexible Wireless-Powered Circuit Printed on a Moist, Soft Contact Lens

Taiki Takamatsu, Yunhan Chen, Toshihiko Yoshimasu, Matsuhiko Nishizawa, Takeo Miyake

研究成果: Article

抄録

Contact lens with built-in electronics is a next-generation wearable product with potential applications such as biomedical sensing and wearable displays. However, fabricating a wireless-powered circuit on a moist, soft contact lens, via common dry lithography, makes producing smart contact lenses challenging. Here, electrochemically (EC) printing a wireless-powered circuit onto a moist, soft contact lens is demonstrated. EC printing involves adding a conductive polymer at the interface between a metal contact and a hydrogel-based contact lens, resulting in strong adhesion of the circuit to the lens without losing high power transfer efficiency (50%) from an eyeglass transmitter to the printed receiver lens. The energy transfer characteristics during eye movement are modeled using the Neumann equation and Kirchhoff's voltage law for wireless power transfer. The energy transfer efficiency between the eyeglass transmitter and the printed receiver lens is derived, and illumination of a wireless-powered single light-emitting diode display as a function of eye rotation angle is demonstrated. This work opens the door to integrating more complex circuits at soft contact lens interface to produce smart contact lens with increased functionality.

元の言語English
記事番号1800671
ジャーナルAdvanced Materials Technologies
DOI
出版物ステータスPublished - 2019 1 1

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Contact lenses
Printed circuits
Eyeglasses
Lenses
Networks (circuits)
Energy transfer
Printing
Transmitters
Eye movements
Hydrogel
Hydrogels
Lithography
Light emitting diodes
Polymers
Electronic equipment
Adhesion
Lighting
Metals
Display devices
Electric potential

Keywords

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Industrial and Manufacturing Engineering

    これを引用

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    abstract = "Contact lens with built-in electronics is a next-generation wearable product with potential applications such as biomedical sensing and wearable displays. However, fabricating a wireless-powered circuit on a moist, soft contact lens, via common dry lithography, makes producing smart contact lenses challenging. Here, electrochemically (EC) printing a wireless-powered circuit onto a moist, soft contact lens is demonstrated. EC printing involves adding a conductive polymer at the interface between a metal contact and a hydrogel-based contact lens, resulting in strong adhesion of the circuit to the lens without losing high power transfer efficiency (50{\%}) from an eyeglass transmitter to the printed receiver lens. The energy transfer characteristics during eye movement are modeled using the Neumann equation and Kirchhoff's voltage law for wireless power transfer. The energy transfer efficiency between the eyeglass transmitter and the printed receiver lens is derived, and illumination of a wireless-powered single light-emitting diode display as a function of eye rotation angle is demonstrated. This work opens the door to integrating more complex circuits at soft contact lens interface to produce smart contact lens with increased functionality.",
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    AU - Nishizawa, Matsuhiko

    AU - Miyake, Takeo

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