05.08.17
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP will present a high-resolution fingerprint-sensor at SID Display Week 2017, from May 23-25 2017 in Los Angeles, CA
Fraunhofer FEP has been developing various application-specific OLED microdisplays based on OLED-on-silicon technology successfully for many years. This technology enables the high-precision integration of an OLED as light source on a microchip. This microchip can be designed with further sensor elements, e.g. photodiodes. By this, objects can be illuminated and at the same time the reflected light detected and analyzed.
Such microdisplays can be integrated into interactive data eyeglasses as a “bi-directional microdisplay”: the tiny display projects the information for augmented-reality applications whereas the camera function detects the viewing direction – thus the content can be controlled by eye-movements.
“We have used an extra-thin encapsulation for the chip of this fingerprint sensor,” Bernd Richter, deputy division manager for OLED microdisplays and sensors at Fraunhofer FEP, explained. “Thereby the distance between finger and image sensor has been minimized and the fingerprint can be captured excellently. Thus, an additional imaging optics is not necessary for this application.”
The first prototype has a native resolution of 1600 dpi – this is three times more than typically required by the FBI. This high spatial resolution enables the identification even of smallest sweat pores beside the typical papillary lines, which can be used to increase the security.
Fraunhofer FEP has been developing various application-specific OLED microdisplays based on OLED-on-silicon technology successfully for many years. This technology enables the high-precision integration of an OLED as light source on a microchip. This microchip can be designed with further sensor elements, e.g. photodiodes. By this, objects can be illuminated and at the same time the reflected light detected and analyzed.
Such microdisplays can be integrated into interactive data eyeglasses as a “bi-directional microdisplay”: the tiny display projects the information for augmented-reality applications whereas the camera function detects the viewing direction – thus the content can be controlled by eye-movements.
“We have used an extra-thin encapsulation for the chip of this fingerprint sensor,” Bernd Richter, deputy division manager for OLED microdisplays and sensors at Fraunhofer FEP, explained. “Thereby the distance between finger and image sensor has been minimized and the fingerprint can be captured excellently. Thus, an additional imaging optics is not necessary for this application.”
The first prototype has a native resolution of 1600 dpi – this is three times more than typically required by the FBI. This high spatial resolution enables the identification even of smallest sweat pores beside the typical papillary lines, which can be used to increase the security.
