The present application provides a control component, a display screen, and a control device. The control component is integrated in a display screen and includes a substrate and a light control structure and a touch control structure arranged side by side on the substrate; the light control structure includes a signal input line, a signal output line, and a photosensitive circuit electrically connected between the signal input line and the signal output line; the touch control structure includes a plurality of receiving electrodes and a plurality of transmitting electrodes; and the receiving electrodes are multiplexed as the signal output line.