This document describes systems and techniques directed at minimizing display flickering during biometric authentication. In aspects, an electronic device having a display panel and a biometric authentication system, such as an under-display fingerprint sensor (UDFPS), includes a display manager configured to implement a localized high-luminance region on the display panel during biometric authentication. The display manager may be further configured to implement a standby state at one or more intervals during the biometric authentication, so as to reduce a number of signal modulations which may otherwise be perceived as a display flickering. In so doing, the display manager selectively entering a standby state during a biometric authentication can minimize display flickering, affording a better user experience.