Bidirectional OLED Microdisplays

Bidirectional OLED Microdisplays

© Fraunhofer IPMS
Bidirectional OLED microdisplay with fingerprint recognition.

A bidirectional display is capable of both displaying and recording images. This is made possible by a special pixel arrangement. A pixel not only comprises 4 sub-pixels for image reproduction (RGBW), but also a photodiode for light detection. This structure results in a pixel matrix consisting of two sub-matrices: a display matrix with an image sensor matrix nested within it.

Areas of application

  • in data glasses for improved human-machine interaction
  • as display elements in wearables
  • to support visually impaired people
  • as work support in industrial production, logistics and much more
  • as fingerprint sensors