A display screen component for an electronic device , comprising: a display screen comprising a display area and a non-display area ; and a sensor unit disposed below the display screen , and comprising a signal emitter and a signal receiver , and the signal receiver being arranged below the display area , wherein the non-display area comprises a functional portion , the signal emitter has a signal-emission surface facing the functional portion , and the display screen component further comprises a functional unit , in which the functional unit is disposed below the display screen and the functional portion is aligned with at least a part of the functional unit , wherein the functional portion is configured to allow a detecting signal to pass therethrough, and the display screen is configured to allow a reflected signal to pass therethrough, characterized in that the signal emitter is arranged below the non-display area , and configured to emit the detecting signal to outside through the functional portion , and the signal receiver is configured to receive the reflected signal produced by an external object reflecting the detecting signal from the outside through the display screen , the functional portion defines an opening therein, the signal emitter is configured to emit the detecting signal to outside through the opening , and the functional unit shares the opening with the signal emitter , the non-display area defines a notch at an edge thereof, and the opening is configured as the notch enclosed by a housing of the electronic device , both centers of the functional unit and the signal emitter are arranged in a horizontal direction. a display screen comprising a display area and a non-display area ; and a sensor unit disposed below the display screen , and comprising a signal emitter and a signal receiver , and the signal receiver being arranged below the display area , wherein the non-display area comprises a functional portion , the signal emitter has a signal-emission surface facing the functional portion , and the display screen component further comprises a functional unit , in which the functional unit is disposed below the display screen and the functional portion is aligned with at least a part of the functional unit , wherein the functional portion is configured to allow a detecting signal to pass therethrough, and the display screen is configured to allow a reflected signal to pass therethrough, characterized in that the signal emitter is arranged below the non-display area , and configured to emit the detecting signal to outside through the functional portion , and the signal receiver is configured to receive the reflected signal produced by an external object reflecting the detecting signal from the outside through the display screen , the functional portion defines an opening therein, the signal emitter is configured to emit the detecting signal to outside through the opening , and the functional unit shares the opening with the signal emitter , the non-display area defines a notch at an edge thereof, and the opening is configured as the notch enclosed by a housing of the electronic device , both centers of the functional unit and the signal emitter are arranged in a horizontal direction. <EOS>