A colour conversion element, comprising: a plurality of light transmitting regions including a first colour region (Rb), a second colour region (Rg), and a third colour region (Rr), which are spaced apart from each other; and a first colour filter layer located at least partially in the first colour region (Rb); wherein the first colour region (Rb) includes a first region and a second region, the first region being a region where the first colour filter layer is arranged to filter light, and the second region being a region where the first colour filter layer is not arranged to filter light, wherein the second region of the first colour region (Rb) does not include the first colour filter layer at all, wherein the colour conversion element further comprises a second colour conversion layer located in the second colour region (Rg) and a third colour conversion layer located in the third colour region (Rr), and wherein the colour conversion element further comprises a base substrate; wherein the second colour conversion layer is located in in the second colour region (Rg) and the third colour conversion layer is located in the third colour region (Rr); the first colour filter layer, the second colour conversion layer and the third colour conversion layer are disposed on the base substrate; the first colour filter layer, the second colour conversion layer, and the third colour conversion layer are sequentially arranged on a plane; and an interval between the first colour filter layer and the second colour conversion layer is different from an interval between the second colour conversion layer and the third colour conversion layer, wherein the second colour conversion layer and/or the third colour conversion layer includes: a first colour cutting layer (420G, 420R); and a colour conversion medium layer (430G, 430R) overlapping the first colour cutting layer (420G, 420R), wherein a part of the colour conversion medium layer (430G, 430R) is on the first colour filter layer to overlap at least a part of the first colour filter layer. a plurality of light transmitting regions including a first colour region (Rb), a second colour region (Rg), and a third colour region (Rr), which are spaced apart from each other; and a first colour filter layer located at least partially in the first colour region (Rb); wherein the first colour region (Rb) includes a first region and a second region, the first region being a region where the first colour filter layer is arranged to filter light, and the second region being a region where the first colour filter layer is not arranged to filter light, wherein the second region of the first colour region (Rb) does not include the first colour filter layer at all, wherein the colour conversion element further comprises a second colour conversion layer located in the second colour region (Rg) and a third colour conversion layer located in the third colour region (Rr), and wherein the colour conversion element further comprises a base substrate; wherein the second colour conversion layer is located in in the second colour region (Rg) and the third colour conversion layer is located in the third colour region (Rr); the first colour filter layer, the second colour conversion layer and the third colour conversion layer are disposed on the base substrate; the first colour filter layer, the second colour conversion layer, and the third colour conversion layer are sequentially arranged on a plane; and an interval between the first colour filter layer and the second colour conversion layer is different from an interval between the second colour conversion layer and the third colour conversion layer, wherein the second colour conversion layer and/or the third colour conversion layer includes: a first colour cutting layer (420G, 420R); and a colour conversion medium layer (430G, 430R) overlapping the first colour cutting layer (420G, 420R), wherein a part of the colour conversion medium layer (430G, 430R) is on the first colour filter layer to overlap at least a part of the first colour filter layer. a first colour cutting layer (420G, 420R); and a colour conversion medium layer (430G, 430R) overlapping the first colour cutting layer (420G, 420R), wherein a part of the colour conversion medium layer (430G, 430R) is on the first colour filter layer to overlap at least a part of the first colour filter layer.