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.