Containing dichroic dye
公开/公告号：
US5751389 A
公开/公告日期：
May 12, 1998
被引量：
摘要：
Films containing oriented dye, methods of manufacturing such films, and polarizers and liquid crystal display devices utilizing the films are disclosed. The film contains at least one dichroic dye which is uniaxially oriented. A film has a thickness of not less than 1 nanometer and not greater than 5 micrometer and contains the dichroic dye of not less than 1 percent by weight and not greater than 100 percent by weight. The film has a peak of absorption at 400 nm through 800 nm and a dichroic ratio of not less than 25 at the peak of absorption. The film may include a micro-pattern having a minimum width in a film plane of not less than 1 micrometer and not greater than 200 micrometer. In such a case, the dichroic dye has a dichroic ratio of not less than 10 at the peak of absorption. A method of manufacturing such a film according to the invention includes the step of forming a dye-containing film on a substrate having a fluororesin alignment layer on the surface thereof. The dye-containing film includes at least one dichroic dye or a mixture of at least one dichroic dye and at least one polymer compound. In subsequent steps, the dye-containing film may be stripped off from the substrate and transferred to another substrate.
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