Transparent laminates and optical filters for displays using same
First Claim
1. An optical filter for plasma displays which blocks electromagnetic waves and near-infrared radiation emerging from the plasma display, said optical filter comprising:
- a transparent laminate formed by laminating high-refractive-index transparent film layers and metal film layers consisting of silver or a silver-containing alloy on one surface of a transparent substrate in such a way that a repeating unit comprising a combination of one high-refractive-index transparent film layer and one metal film layer in this order is repeatedly laminated from three times to six times, and further laminating at least a high-refractive-index transparent film layer thereon;
wherein a sheet resistance of an electrically conductive surface of a topmost surface of the transparent laminate is not greater than 3 ohm/sq., and said transparent laminate has a visible light transmittance of not less than 50%, and a light transmittance of not great than 20% at any wavelength between 820 nm and 1000 nm;
a metal containing electrode electrically connected to the electrically conductive surface; and
the transparent laminate contains a dye which is near-infrared absorbing dye and/or a toning dye which has an absorption band in the visible region.
3 Assignments
0 Petitions
Accused Products
Abstract
Transparent laminates which have high transparency and, moreover, excellent electromagnetic shielding characteristics and near-infrared cutting-off characteristics, and optical filters for displays using these transparent laminates. These transparent laminates are formed by laminating a transparent electrically conductive layer composed of high-refractive-index transparent film layers (B) and metal film layers (C) consisting of silver or a silver-containing alloy on one major surface of a transparent substrate (A) in such a way that a repeating unit comprising a combination of one high-refractive-index transparent film layer (B) and one metal film layer (C) is laminated three times or more, and further laminating one high-refractive-index transparent film layer (B) thereon. The transparent laminate has a sheet resistance of not greater than 3 Ω/sq., a visible light transmittance of not less than 50%, and a light transmittance of not greater than 20% in a wavelength region longer than 820 nm. Optical filters for displays which serve to block leakage electromagnetic waves and near-infrared light from plasma displays can be acquired by using such a transparent laminate.
-
Citations
25 Claims
-
1. An optical filter for plasma displays which blocks electromagnetic waves and near-infrared radiation emerging from the plasma display, said optical filter comprising:
-
a transparent laminate formed by laminating high-refractive-index transparent film layers and metal film layers consisting of silver or a silver-containing alloy on one surface of a transparent substrate in such a way that a repeating unit comprising a combination of one high-refractive-index transparent film layer and one metal film layer in this order is repeatedly laminated from three times to six times, and further laminating at least a high-refractive-index transparent film layer thereon; wherein a sheet resistance of an electrically conductive surface of a topmost surface of the transparent laminate is not greater than 3 ohm/sq., and said transparent laminate has a visible light transmittance of not less than 50%, and a light transmittance of not great than 20% at any wavelength between 820 nm and 1000 nm; a metal containing electrode electrically connected to the electrically conductive surface; and the transparent laminate contains a dye which is near-infrared absorbing dye and/or a toning dye which has an absorption band in the visible region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification