| 摘要 |
PROBLEM TO BE SOLVED: To realize a white display exhibiting an almost pure white color when a polarizing film is used for a reflection type liquid crystal display device or semitransmitting reflection type liquid crystal display device, by adsorbing and aligning iodine to a polyvinylalcohol resin film to prepare the polarizing film and controlling the difference between the maximum and minimum of the parallel transmittance in a specified region of wavelength to a specified value or smaller. SOLUTION: The polarizing film is prepared by adsorbing and aligning iodine to a polyvinylalcodol resin film and controlling the difference ΔT between the maximum TMax and the minimum TMin of the parallel transmittance in 440 to 670 nm wavelength region to <=6%. That is, by controlling the difference ΔT between the maximum TMax and the minimum TMin of the parallel transmittance in 440 to 670 nm wavelength region to <=6%, preferably <=4%, and more preferably <=2%, a white display exhibiting an almost pure white color can be obtained when the film is used for a reflection type or semitransmission reflection type liquid crystal display device. |
