A display device comprising: a display panel and a photosensitive imaging device, wherein the display panel comprises a display side and a back side opposite to the display side, and the display panel further comprises a filter layer disposed at the back side of the display panel, the photosensitive imaging device is stacked with the display panel and located at a side of the filter layer facing away from the display side, and the photosensitive imaging device is configured to detect a skin texture image of a user touching the display panel, and the display panel further comprises a pixel unit, the pixel unit comprises a light-emitting device, and the display panel is configured to allow light emitted by the light-emitting device, in a case where the light-emitting device is working, to be reflected by a user skin touching the display panel, for skin texture image recognition, wherein the filter layer comprises a substrate layer and a filtering function layer having a filtering function, and the substrate layer and the filtering function layer are stacked and combined with each other, the filtering function layer comprises at least one film layer group, each film layer group comprises a plurality of film layers, wherein the filtering function layer comprises a first reflection film layer group, and the first reflection film layer group comprises at least one film layer having a first refractive index and at least one film layer having a second refractive index, which are disposed at intervals, and the first refractive index is greater than the second refractive index, characterized in that the filtering function layer further comprises a spacer film layer group and a second reflection film layer group, the first reflection film layer group, the spacer film layer group, and the second reflection film layer group are sequentially stacked on the first side of the substrate layer, and the second reflection film layer group comprises at least one film layer having the first refractive index and at least one film layer having the second refractive index, and the spacer film layer comprises a plurality of film layers with a same refractive index. a display panel and a photosensitive imaging device, wherein the display panel comprises a display side and a back side opposite to the display side, and the display panel further comprises a filter layer disposed at the back side of the display panel, the photosensitive imaging device is stacked with the display panel and located at a side of the filter layer facing away from the display side, and the photosensitive imaging device is configured to detect a skin texture image of a user touching the display panel, and the display panel further comprises a pixel unit, the pixel unit comprises a light-emitting device, and the display panel is configured to allow light emitted by the light-emitting device, in a case where the light-emitting device is working, to be reflected by a user skin touching the display panel, for skin texture image recognition, wherein the filter layer comprises a substrate layer and a filtering function layer having a filtering function, and the substrate layer and the filtering function layer are stacked and combined with each other, the filtering function layer comprises at least one film layer group, each film layer group comprises a plurality of film layers, wherein the filtering function layer comprises a first reflection film layer group, and the first reflection film layer group comprises at least one film layer having a first refractive index and at least one film layer having a second refractive index, which are disposed at intervals, and the first refractive index is greater than the second refractive index, characterized in that the filtering function layer further comprises a spacer film layer group and a second reflection film layer group, the first reflection film layer group, the spacer film layer group, and the second reflection film layer group are sequentially stacked on the first side of the substrate layer, and the second reflection film layer group comprises at least one film layer having the first refractive index and at least one film layer having the second refractive index, and the spacer film layer comprises a plurality of film layers with a same refractive index.