Electronic device

An electronic device, comprising:

• a substrate;
• a color filter layer disposed on the substrate, wherein the color filter layer comprises a light shielding unit and a plurality of color filter units adjacent to the light shielding unit, and the plurality of color filter units comprises a first color filter unit, a second color filter unit and a third color filter unit;
• a first refractive index-matching layer disposed between the substrate and the color filter layer, wherein the first refractive index-matching layer comprises an opening, and the opening and at least one of the light shielding unit, the first color filter unit, the second color filter unit and the third color filter unit are overlapped in a top view of the substrate;
• and
• a third refractive index-matching layer disposed between the substrate and the color filter layer, wherein the third refractive index-matching layer and the light shielding unit are overlapped in the top view of the substrate, and a refractive index of the first refractive index-matching layer is different from a refractive index of the third refractive index-matching layer,
• wherein the third refractive index-matching layer and at least one of plurality of color filter units are overlapped in the top view of the substrate.