Enabling Under Display 3D Facial Recognition

Our manufacturing technology enables under display 3D Facial Recognition by patterning transparent openings in the display. These openings allow the required NIR sensors to function without requiring a notch or punch hole in the display.

3D Facial Recognition

3D Facial Recognition uses a complex array of sensors and other components to provide a detailed biometric map of a user’s face for automating the unlocking of devices and provide authentication. These sensors typically operate at Near Infrared (NIR) wavelengths to make their functionality less dependent on the ambient lighting conditions.

3D Facial Recognition can be found in numerous consumer devices, such as smartphones, tablets and laptops. It is used in Apple’s Face ID® and Microsoft’s Windows Hello® biometric authentication solutions for face unlock.

NIR Sensors Require Notch or Punch Hole Display

The NIR sensors used for 3D Facial Recognition require line of site to the user’s face to function correctly. Although many materials are transparent or semitransparent at NIR wavelengths, several of the layers used in mobile displays block or reflect NIR signals.

NIR sensors typically require a large bezel region, or notch or punch hole in the display to function correctly. Elimination of the notch or punch hole has become a priority for many leading mobile device brands.

Cathode Patterning for Under Display NIR Sensors

Learn how our CPM™ Patterning technology is enabling under display NIR sensors for biometric authentication.

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Introducing OTI Under Display 3D Facial Recognition

To move the NIR sensors under the displays requires microscopic openings to be made between the pixels. However, in mass production it is very difficult to pattern certain layers of the display, for example the top electrode. This top electrode reflects NIR signals and therefore needs to be removed for 3D Facial Recognition to function.

Solutions for patterning the top electrode in mass production have eluded display manufacturers since traditional patterning methods are not compatible.

OTI CPM™ Patterning for Under Display NIR Sensors

OTI has developed a solution for patterning the top electrode in mobile displays that is compatible with mass production. This solution using CPM™ Patterning technology to self-assemble microscopic openings between the pixels, allowing the NIR signals to pass through the display.

Allowing NIR signals to pass through the display eliminates the need for a notch or punch hole, making under display 3D facial recognition a reality.

Learning more in Information Display Magazine.

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