Functional film composition for display
Disclosed is a functional film composition for a display which comprises an engineering plastic resin, a first pigment absorbing a near-infrared ray; and a second pigment selectively absorbing a wavelength and maintaining thermal stability at a temperature of about 200 through 300° C., thereby exhibiting an excellent electromagnetic wave shielding function in a range of 550 to 610 nm which emits orange light in addition to in a range of 900 to 1200 nm of a near infrared ray, exhibiting a relatively good thermal resistance, moisture resistance, and light resistance in comparison with a conventional transparent plastic film, and exhibiting superior color purity and brightness, so that it can be applied to a PDP filter pursuing good quality, cost reduction, composition of each function, and simplification of structure, and particularly applied to display devices, such as an LCD, an OLED, a flexible display, and the like, pursuing improved optical properties.
1 . A functional film composition for a display, comprising:
a) an engineering plastic resin;
b) a first pigment absorbing a near-infrared ray; and
c) a second pigment selectively absorbing a wavelength and maintaining thermal stability at a temperature of about 200 to 300□.
2 . The film composition of claim 1 , comprising:
a) about 100 parts by weight of the engineering plastic resin;
b) about 2 to about 20 parts by weight of the first pigment; and
c) about 3 to about 20 parts by weight of the second pigment.
3 . The film composition of claim 1 , wherein the engineering plastic resin comprises at least one resin selected from a group consisting of a polyester-based resin, an acrylic-based resin, a cellulose-based resin, a polyolefin-based resin, a polyvinyl chloride-based resin, a polycarbonate-based resin, a phenol-based resin, and an urethane-based resin.
4 . The film composition of claim 1 , wherein the first pigment is a diimonium-based compound.
5 . The film composition of claim 1 , wherein the second pigment is either a color correction pigment for absorbing neon light in a range of about 550 to about 610 nm, or a color correction pigment for absorbing light in a range of about 470 to about 520 nm.
6 . The film composition of claim 1 , wherein the second pigment comprises at least one pigment selected from a group consisting of a cyanine-based pigment, a polymethine-based pigment, a squarylium-based pigment, a phthalocyanine-based pigment, a quinone-based pigment, an azaporphyrin-based pigment, an azo-based pigment, an azochelate-based pigment, an azlenium-based pigment, a pirillum-based pigment, a croconium-based pigment, an indoaniline chelate-based pigment, an indonaphthol chelate-based pigment, a dithiol metal complex-based pigment, a pyrromethene-based pigment, an azomethine-based pigment, a xanthene-based pigment, and an oxonol-based pigment.
7 . The film composition of claim 1 , further comprising d) about 3 to about 30 parts by weight of an ultraviolet absorbing agent.
8 . The film composition of claim 1 , wherein a light-transmittance of the film composition is less than about 10% in a range of about 850 to about 1,100 nm, and is about 30 to about 70% in ranges of about 550 to about 610 nm and about 470 to about 520 nm.
9 . A filter for a display device including a functional film for a display, the functional film comprising:
a) an engineering plastic resin;
b) a first pigment absorbing a near-infrared ray; and
c) a second pigment selectively absorbing a wavelength, and maintaining thermal stability at a temperature of about 200 through 300° C.
10 . The filter of claim 9 , wherein the filter is a filter for a PDP.