To provide a method for creating a low-cost high-definition color conversion layer having no bleeding into adjacent subpixels and having a consistent thickness by using an inkjet method.

In a bank layer 60 including a bank layer 60A having a plurality of protrusions 63 each of which is composed of a gentle curved surface, each protrusion 63 includes a first layer 61 and a second layer 62 and these protrusions 63 exist discretely on a substrate to form a color conversion filter 1000.