Leti reports on combined microLED display and sensing screen
French research institute CEA-Leti (Grenoble, France) has reported on its ability to integrate GaN microLED display, general light sources and organic photodetectors for multifunction displays.
This depends on the ability to combine, silicon, compound semiconductor and organic semiconductor processing and is a step towards the creation of displays that can sense, display and potentially do near-sensor processing, the research institute said.
The results were presented in a paper at the Society for Information Display (SID) International Symposium titled Co-Integration of Organic Photodetector with MicroLED Dedicated to Multifunctional Display Application.
Such as display would be capable of high-brightness visual output along with imaging, gesture recognition at distance and biometric scanning, such as fingerprint scanning. It could include medical bio-monitoring such as heart rate, blood oxygen and temperature.
The major technical hurdle to multifunction operation is cross-talk where light emitted from the microLEDs interferes with the photodetector. The paper explores how spatial separation between light sources and photodetectors can mitigate this issue.
“MicroLED’s high radiance allows us to free up more space on the display panel to incorporate photodetectors, which not only enhances the display experience but also opens up new possibilities for smart, interactive screens,” said Michaël Pelissier, lead author of the paper.
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