Liquid crystal panel and liquid crystal display apparatus
A liquid crystal panel and liquid crystal unit technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of uneven phase difference, unobtained phase difference film, film rupture, etc., to prevent unevenness and long-term display performance The effect of maintaining and enhancing contrast
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Example
[0255] (Preparation Example 1)
[0256] The biaxially stretched polypropylene film "TORAYFAN B02873" (trade name, 60μm in thickness, available from Toray Industries Co., Ltd.) with properties shown in Table 1 was passed through an acrylic pressure-sensitive adhesive layer (with a thickness of 15μm) ) Attached to both sides of the norbornene-based resin film "ZEONORZF14-100" (trade name, thickness of 100 μm, available from Zeon Co., Ltd.). Then, using a roll stretching machine, the resulting product was stretched 1.38 times at 146°C (the temperature at a distance of 3cm from the back surface of the film, temperature fluctuation ±1°C) in an air circulating constant temperature heating furnace, while fixing the film In the longitudinal direction, a retardation film A was manufactured. Table 2 shows the performance of the obtained retardation film. The glass transition temperature (Tg) of this norbornene-based film was 136°C, the retardation value before stretching was 5.0 nm, and the...
Example
[0259] (Preparation Example 2)
[0260] The retardation film B was manufactured in the same manner as in Preparation Example 1, except that the stretching temperature was changed from 146°C to 148°C and the stretching ratio was changed from 1.38 times to 1.40 times. Table 2 shows the stretching conditions and properties of the obtained retardation film B.
Example
[0261] (Preparation Example 3)
[0262] The retardation film C was manufactured in the same manner as in Example 1, except that the stretching temperature was changed from 146°C to 148°C and the stretching ratio was changed from 1.38 times to 1.35 times. Table 2 shows the stretching conditions and properties of the obtained retardation film C.
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