Biometric Sensing Display Layout With Shared Driving Circuits

The patent merges the sensor driving part with the pixel driving part by sharing common circuit elements. Specifically, the sensor driving part reuses the ELVDD power line, ELVSS ground line, and control signal lines (SCAN, GATE, DATA) that are already present for pixel driving, thereby eliminating the need for separate dedicated sensor driving circuits and saving space for pixel driving circuits.

The patent implements multi-functionality by designing the pixel driving circuit to simultaneously serve both pixel control and sensor driving functions. The same driving circuit infrastructure (power lines, control lines, timing circuits) is used to drive both the light emitting devices for display and the photo-detectors for biometric sensing, allowing one circuit system to perform multiple functions.

The patent applies universality by designing a single set of driving circuits that can control both pixels and sensors. The pixel driving part and sensor driving part share the same control signal lines (SCAN, GATE, DATA) and power supply lines (ELVDD, ELVSS), reducing device complexity while maintaining control precision through proper timing and signal management.

The patent uses periodic action by implementing time-division multiplexing where the shared driving circuits alternately serve pixels and sensors in different time periods. The driving circuits control pixels during display periods and sensors during sensing periods, using periodic scanning signals to achieve precise control of both functions without requiring separate dedicated circuits.