Abstract: The present invention is related to a display screen mask structure, providing a plurality of arranged and combined substrate units overlapped on a self-light emitting display element of a photoelectric device panel. The light, radiated from the self-light emitting display element, is filtered and reflected by and concentratedly radiated from a light-reflecting layer overlapped on the light-transmitting bodies of the substrate units, so that the light leakage can be prevented and an external strong light can be shielded by the light-shielding layer overlapped on the light-reflecting layer, the light generated from the self-light emitting display element can be efficiently concentrated, and the phenomenon such as whitening and low image contrast ratio occurred by an external light radiating on a display panel can be improved.