FILTER FOR DISPLAY DEVICE
A filter 100 for a display device includes a transparent substrate 110 ; a near infrared ray blocking layer 120 ; and electromagnetic shielding layer 130 ; an external light blocking layer 140 ; and a color compensation layer 150 . The near infrared ray blocking layer 120 is formed on the transparent substrate 110 and includes a metal thin film and a metal oxide thin film which are alternately layered, each of the metal thin film and the metal oxide thin film being layered one or more times. The electromagnetic shielding layer 130 is formed on the near infrared ray blocking layer 120 and includes a metal mesh pattern. The external light blocking layer 140 includes an external light blocking pattern 144 , the external light blocking pattern including a plurality of external light blocking parts with a wedge shape which are filled with a light absorbing material and a conductive material. The color compensation layer 150 is formed on the external light blocking layer 140 and includes a polymer resin and at least two kinds of colorants selectively absorbing lights. The filter 100 has a transmittance of 5% or less at an 850 nm wavelength. The filter 100 has excellent performance in blocking near infrared rays and electromagnetic waves and high transmittance to visible light.
1 . A filter for a display device comprising:
a transparent substrate;
a near infrared ray blocking layer comprising a metal thin film and a metal oxide thin film which are alternately layered, each of the metal thin film and the metal oxide thin film being layered one or more times; and
an electromagnetic shielding layer comprising a conductive mesh pattern.
2 . The filter for the display device of claim 1 further comprising an external light blocking layer,
wherein the external light blocking layer comprises an external light blocking pattern and the external light blocking pattern comprises a plurality of external light blocking parts with a wedge shape which are filled with a light absorbing material and a conductive material.
3 . The filter for the display device of claim 1 further comprising a color compensation layer,
wherein the color compensation layer comprises a polymer resin and at least two kinds of colorants which selectively absorb lights.
4 . The filter for the display device of claim 3 ,
wherein the color compensation layer comprises a first colorant absorbing light with wavelengths of 430 nm˜500 nm and a second colorant absorbing light with wavelengths of 560 nm˜620 nm.
5 . The filter for the display device of claim 4 ,
wherein the color compensation layer comprises 0.01˜1 parts by weight of the first colorant and 0.01˜1 parts by weight of the second colorant based on 100 parts by weight of the polymer resin.
6 . The filter for the display device of claim 1 ,
wherein the filter has a transmittance of 5% or less at an 850 nm wavelength.
7 . The filter for the display device of claim 1 ,
wherein the near infrared ray blocking layer has a total thickness of 500 nm or less.
8 . The filter for the display device of claim 1 ,
wherein the metal thin film has a thickness of 10˜50 nm, and the metal oxide thin film has a thickness of 3˜60 nm.
9 . The filter for the display device of claim 8 ,
wherein each of the metal thin film and the metal oxide thin film are layered once or twice.
10 . The filter for the display device of claim 1 ,
wherein the near infrared ray blocking layer has a transmittance of 85% or more to visible light, and the filter has a transmittance of 45% or more to visible light.
11 . The filter for the display device of claim 1 ,
wherein the filter has a sheet resistance of 0.05Ω/□ or less.