Abstract: A prism sheet, a backlight module, a display and a preparation method of the prism sheet are provided. The prism sheet includes a base layer and a prism layer located on a surface of a first side of the base layer, holes are provided inside the base layer, so that light received from a second side of the base layer reaches the prism layer through the holes, and the first side of the base layer and the second side of the base layer are opposite to each other.

Abstract: The disclosure relates to a display device including: an organic light-emitting diode display panel, a fingerprint recognition layer located below the organic light-emitting diode display panel, and a light filtering layer located between the organic light-emitting diode display panel and the fingerprint recognition layer, where the light filtering layer is configured to filter out light rays with an incidence angle greater than a filter angle among light rays carrying fingerprint line information, and to transmit light rays with an incidence angle smaller than or equal to the filter angle, where the incidence angle is the angle between the light rays carrying fingerprint line information, and the direction perpendicular to the fingerprint recognition layer.