| 摘要 |
PROBLEM TO BE SOLVED: To improve the screen luminance of a semitransmissive semireflective liquid crystal display device when the device is used as a reflection type, and to allow the system for the improvement of luminance by using a reflection type polarizing deice to be used in the semitransmissive semireflective liquid crystal display device. SOLUTION: A semitransmissive semireflective film is obtained by applying a semitransmissive semireflective layer consisting of a metal thin film on a transparent polymer film having 30 nm phase difference in the plane. A semitransmissive semitreflective polarizing device is obtained by laminating a light-diffusing layer and an absorption type polarizing element on one surface of an optical film prepared by applying a semitransmissive semireflective layer consisting of a metal thin film on a transparent polymer film, or by laminating a light-diffusing layer on an absorption type polarizing element on which a semitransmissive semireflective layer consisting of a metal film is applied. Further, a light source device 34 for polarized light is obtained by stacking the semitransmissive semireflective polarizing device 32 and a back illumination device 33. A semitransmissive semireflective liquid crystal display device 35 is produced by using the light source device 34 for polarized light. |
