| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light guide plate excellent in transferring property and heat resistance and reduced in color unevenness regardless of its extremely thin thickness of ≥150 in the ratio (L/T)of its width to its thickness in a light incident direction. <P>SOLUTION: The light guide plate is formed by molding a cyclic olefin resin composition satisfying a light transmittance T<SB>420</SB>of ≥75% at the wavelength of 420 nm and a light transmittance T<SB>750</SB>of ≥87% at the wavelength of 750 nm at the optical path length of 50 mm. The melt viscosity measured at 260°C and 1216/sec in shear rate based on ISO 11443 preferably ranges from 45 Pa s to 85 Pa s. Preferably, the cyclic olefin resin composition having a glass transition point of ≥100°C is used. <P>COPYRIGHT: (C)2010,JPO&INPIT |
