Dye-based polarizing plate for infrared wavelength range using azo, anthraquinone, or cyanine compound
AssigneesNippon Kayaku Kabushiki Kaisha, Polatechno Co., Ltd.
InventorsNoriaki Mochizuki, Takahiro Higeta
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Abstract
The purpose of the present invention is to provide: a high-performance polarizing plate which functions for light in an infrared wavelength range; and a liquid-crystal display device or the like comprising the same. Provided is a polarizing plate for an infrared range, which is a stretched film containing a dye exhibiting absorption in an infrared range, the film exhibiting dichroism.
Claims11
A polarizing plate which is a stretched film comprising a dye exhibiting absorption in an infrared range and which is dichroic in an infrared range, wherein the polarizing plate has a dichroic ratio of five or more, wherein the dye is selected from the group consisting of an azo compound selected from the group consisting of C.I. Acid Black 2 and a complex formed therefrom with a metal, an anthraquinone compound represented by the General Formula 13:
- and a cyanine compound represented by the General Formula 3 or 4:
A method of using a dye exhibiting absorption in an infrared range for a polarizing plate, the method comprising incorporating the dye in a film and stretching the film to develop dichroic properties such that the polarizing plate has a dichroic ratio of five or more, wherein the dye is selected from the group consisting of an azo compound selected from the group consisting of C.I. Acid Black 2 and a complex formed therefrom with a metal, an anthraquinone compound represented by the General Formula 13:
- and a cyanine compound represented by the General Formula 3 or 4:
Dependencies are inferred from the claim text.