Phase difference plate and composite polarizing plate formed by using this plate and liquid crystal display device

Abstract

Abstract PURPOSE:To allow high-quality black and white display with high reliability by stretching a thermoplastic high-polymer film having specific characteristics, thereby forming the phase difference plate. CONSTITUTION:The film formed by uniaxially stretching the thermoplastic high-polymer film is used. The measured value of the retardation defined by the product of a double refractive index and thickness of the film is in a 30-1,200nm range and the color difference when measurement is made by disposing the film in such a manner that the optical axis thereof attains 45 deg. under crossed nicols is <=30. The phase difference plate which has the adequate retardation value, has optically less unequal colors and attains the black and white display of uniform quality is obtd. in this way.

Inventors

• 👤 Kiminari Nakamura
• 👤 中村　公成
• 👤 Toyokazu Okada
• 👤 岡田　豊和
• 👤 Kazuaki Sakakura
• 👤 坂倉　和明
• 👤 Koji Azuma
• 👤 浩二 東

Bibliographic Details