A touchless user interface based on a near-infrared-sensitive transparent optical imager

Takeshi Kamijo

doi:10.1038/s41928-023-00970-8

A touchless user interface based on a near-infrared-sensitive transparent optical imager

2023-06-12

17

OA

AI

T

Takeshi Kamijo *

A

Albert J. J. M. van Breemen *

Luis Moreno Hagelsieb

Auke Jisk Kronemeijer

G

Gerwin H. Gelinck

DOI：10.1038/s41928-023-00970-8

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A transparent organic infrared photodetector array can be placed over a commercial display to provide a touchless control interface. Touchless user interfaces that are based on gestures typically rely on near-infrared cameras. However, such systems are often hampered by their limited field of view and high-accuracy calibration requirements. Here we report a touchless user interface that is based on a visually transparent near-infrared-sensitive organic photodetector array and can be used on top of a display. Optical transparency is achieved by using a printed copper grid as a bottom transparent conductive electrode and an array of patterned organic photodetector subpixels. Electro-optical modelling is used to optimize the design of the image sensor, leading to a photodetectivity of approximately 10(12) Jones at 850 nm and a high visible-light transmittance of 70%. We show that the imager can be used as a penlight-controlled and gesture-controlled touchless user interface when combined with a commercial display.

Keywords:

ORGANIC PHOTODETECTORS

ELECTRODES

ACCEPTOR

A touchless user interface based on a near-infrared-sensitive transparent optical imager

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