Phase difference film, phase difference film composite and liquid crystal display device using the same
AssigneeTeijin Limited
InventorsAkihiko Uchiyama, Takashi Kushida
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Abstract
A retardation film that can compensate for the optical properties of the liquid crystal cells of a liquid crystal display device and thereby enhance image quality. The retardation film consists of a single polymer film, which has a wavelength range in which the retardation value is positive and a wavelength range in which it is negative in a wavelength range of 400-800 nm, and which satisfies the following inequality (1) and/or (2) and has a water absorption of no greater than 1% by mass. |R(400)|≧10 nm (1) |R(700)|≧10 nm (2)
Claims15
A retardation film consisting of a single polymer film, which has a wavelength range in which the retardation value is positive and a wavelength range in which it is negative in a wavelength range of 400-800 nm, which satisfies the following inequality (1) and/or (2), and which has a water absorption of no greater than 1% by mass,
- |R(400)|≧10 nm (1)
- |R(700)|≧10 nm (2)
- where |R(400)| and |R(700)| represent the retardation values at wavelengths of 400 nm and 700 nm, respectively.
Dependencies are inferred from the claim text.