Optical filter for display apparatus
Disclosed is an optical filter for a display filter in which an adhesive layer excluding organic acidic substances is used, thereby achieving superior durability. The optical filter includes an anti-reflection film, a transparent substrate, a mesh film, and a color correction film. In this instance, an inorganic acidic adhesive layer is formed on a surface of at least one of the anti-reflection film, the mesh film, and the color correction film.
1 . An optical filter for a display apparatus comprising:
an anti-reflection film,
a transparent substrate,
a mesh film, and
a color correction film, wherein
an inorganic acidic adhesive layer is formed on a surface of at least one of the anti-reflection film, the mesh film, and the color correction film.
2 . The optical filter of claim 1 , wherein the color correction film is selected from the group consisting of a color correction film with a cyanine-based colorant, a near-infrared absorbing film with a nickel complex or a diimonium-based colorant, or a combination of the color correction film and the near-infrared absorbing film.
3 . The optical filter of claim 2 , wherein the cyanine-based colorant is selected from the group consisting of a carbocyanine compound, a dicarbocyanine compound, a metal chelate compound of a carbocyanine compound or a dicarbocyanine compound, or a mixture thereof.
4 . The optical filter of claim 1 , wherein a change in a transmission chromaticity is less than 0.006 even after testing durability of the optical filter for the display apparatus.
5 . The optical filter of claim 1 , wherein the inorganic acidic adhesive layer is configured to exclude a carboxylic acid, a phenol, an enol, a thiopenol, an aromatic sulfonic acid, and first and second nitro compounds.