Filter structure, filter layer and display panel

A filter structure, comprising:

• a first transflective layer;
• a second transflective layer, opposite to the first transflective layer, a refractive index of the second transflective layer being substantially the same as a refractive index of the first transflective layer;
• and
• a transparent film, located between the first transflective layer and the second transflective layer, and in contact with surfaces of the first transflective layer and the second transflective layer, a refractive index of the transparent film being smaller than that of the first transflective layer and the second transflective layer,
• wherein the filter structure is configured to make light of a specific wavelength range in incident light that is incident from the first transflective layer into the filter structure be emergent from the second transflective layer by adjusting at least one of a thickness and the refractive index of the transparent film, a thickness and the refractive index of the first transflective layer, and a thickness and the refractive index of the second transflective layer, and make a transmittance of the light of the specific wavelength range be not less than 90%, by adjusting at least one of the thickness, the refractive index, and an extinction coefficient of the second transflective layer;
• the thickness of the first transflective layer and the thickness of the second transflective layer are in a range of about 200 angstroms to 400 angstroms.