Optical sheet and display optical filter
An optical sheet, including: a transparent material; a light absorption pattern formed on a side of the transparent material; and a flexible adhesion layer formed on the side of the transparent material in which the light absorption pattern is formed.
1 . An optical sheet, comprising:
a transparent material;
a light absorption pattern formed on a side of the transparent material; and
a flexible adhesion layer formed on the side of the transparent material in which the light absorption pattern is formed.
2 . The optical sheet of claim 1 , wherein the flexible adhesion layer is formed of a flexible adhesive which is coated on the transparent material.
3 . The optical sheet of claim 2 , wherein the flexible adhesive includes an absorption dye or pigment which has maximum absorption of wavelengths in a range of 580 nm to 600 nm.
4 . The optical sheet of claim 2 , wherein the flexible adhesive includes a near-infrared absorption dye or pigment.
5 . The optical sheet of claim 2 , wherein the flexible adhesive maintains flexibility within a temperature range of 50° C. to 150° C. and under a pressure of 1 Kgf/cm 2 .
6 . The optical sheet of claim 1 , wherein a thickness of the flexible adhesion layer is in a range of 10 μm to 50 μm.
7 . The optical sheet of claim 1 , wherein a refractive index of the flexible adhesion layer is in a range of 1.45 to 1.6.
8 . The optical sheet of claim 1 , wherein a difference of refractive indexes between the flexible adhesion layer and the transparent material is less than 0.12.
9 . The optical sheet of claim 1 , wherein a plurality of grooves are formed in the transparent material and the light absorption pattern is provided to fill the grooves.
10 . The optical sheet of claim 9 , wherein the groove and the light absorption pattern have a wedge-shaped section, and provided in parallel at regular intervals on the transparent material.
11 . The optical sheet of claim 9 , wherein a width of the light absorption pattern is in a range of 10 μm to 50 μm.
12 . An optical filter including a plurality of films for a display, the optical filter comprising:
an optical sheet as one of the plurality of films, wherein the optical sheet comprises a transparent material, a light absorption pattern formed on the transparent material, and a flexible adhesion layer formed on the transparent material in which the light absorption pattern is formed.
13 . The optical filter for display of claim 12 , wherein the flexible adhesive layer includes at least any one of an absorption dye or pigment which has maximum absorption of wavelengths in a range of 580 nm to 600 nm, and a near-infrared absorption dye or pigment.