The smartphone industry has embraced biometric sensors as a staple component. Biometric sensors can be integrated into any area of the phone including under the display. Many companies incorporated ergonomics in their engineering by placing sensors where a user’s finger naturally rests when holding the phone. In foldable devices with multiple display regions, the standardized ergonomics of holding a device has changed considerably. The main challenge is to successfully integrate the design and functionalities as desired by the user.

U.S. Publication No. 20200133335 titled “Foldable display device with biometric sensors and method for driving the same” and assigned to the Taiwanese display manufacturer, Innolux Corporation, proposes a simple solution to the biometric sensor implementation problem. The publication proposes the integration of two biometric sensors one in each display region of the foldable display device. Additionally, these two biometric sensors are used for matching two biological features to two biological datums to provide an additional level of security.

US Publication No. 20200133335 assigned to Innolux Corporation

U.S. Publication No. 20200209917 titled “Unlocking Control Method and Related Products” assigned to Guangdong OPPO Mobile Telecommunications Corp., proposes a solution where a plurality of biometric sensors (e.g. fingerprint sensors, facial recognition sensor, iris scanners, etc.) are distributed across the display regions in a foldable display device. The device first determines the display region being unlocked and automatically determines which biometric sensors are present on the determined display region and performs biometric recognition accordingly.

US Publication No. 20200209917 assigned to Oppo