ETH Zurich researchers demonstrate pixel that can both display video and capture light fields

A research team at ETH Zurich reported a pixel design that can simultaneously emit and sense light fields, a capability they call a Fourier pixel. Unlike conventional pixels that only display light, the Fourier pixel manipulates light’s intensity, oscillation phases, and polarization to both generate images and capture spatial light information.

The team published its findings in Nature on July 14, 2026. The paper describes how the pixel’s dual functionality could enable a single device to act as both a display and a camera, potentially integrating sensing and output in the same surface.

The announcement has prompted discussion about privacy implications, drawing comparisons to surveillance scenarios where screens could surreptitiously capture visual data from their surroundings.

Commenters on the topic highlighted existing risks from covert cameras in consumer devices and speculated about future legislative responses to such capabilities.