UNDER-DISPLAY SENSOR

Under-display sensor provided. The under-display sensor includes an optical sensor, having an emitter configured for emitting a sensing light and a receiver configured for detecting an externally-reflected light reflected from an object and returned by the sensing light, a sensor polarization layer, being disposed over the optical sensor and having a polarization axis inclined at a first angle, and a sensor retardation layer, being disposed over the sensor polarization layer and having a slow axis inclined at the first angle with respect to the polarization axis.