Antireflective film including pyramidal projections and display device including antireflective film comprising pyramidal projections

An antireflective film comprising:

• a plurality of pyramidal projections,
• wherein tops of the plurality of pyramidal projections are evenly spaced,
• wherein each side of the base of one pyramidal projection is in contact with one side of the base of an adjacent pyramidal projection,
• wherein the distance between the tops of the plurality of pyramidal projections is equal to or shorter than 350 nm and the height of each of the plurality of pyramidal projections is equal to or longer than 800 nm, and
• wherein a refractive index of each of the plurality of pyramidal projections increases from the top to the base thereof.

A display device comprising:

• a pair of substrates at least one of which is a light-transmitting substrate;
• a display element provided between the pair of substrates;
• and
• a plurality of pyramidal projections on an outer side of the light-transmitting substrate,
• wherein tops of the plurality of pyramidal projections are evenly spaced,
• wherein each side of the base of one pyramidal projection is in contact with one side of the base of an adjacent pyramidal projection, and
• wherein a refractive index of each of the plurality of pyramidal projections increases from the top to the base thereof.

A display device comprising:

• a pair of substrates at least one of which is a light-transmitting substrate;
• a display element provided between the pair of substrates;
• and
• a plurality of pyramidal projections on an outer side of the light-transmitting substrate,
• wherein tops of the plurality of pyramidal projections are evenly spaced,
• wherein each side of the base of one pyramidal projection is in contact with one side of the base of an adjacent pyramidal projection,
• wherein the distance between the tops of the plurality of pyramidal projections is equal to or shorter than 350 nm and the height of each of the plurality of pyramidal projections is equal to or longer than 800 nm, and
• wherein a refractive index of each of the plurality of pyramidal projections increases from the top to the base thereof.