| 摘要 |
<p>A laminated phase plate composed of first and second optical phase difference compensation plates (1 and 2). The retardation of the first optical phase difference compensation plate (1) for a transmitted light with a wavelength of 550 nm is 100 - 180 nm. The retardation of the second optical phase difference compensation plate (2) for a transmitted light with a wavelength of 550 nm is 200 - 360 nm. The plates (1 and 2) are so arranged that the value of |υ1 - 2 X υ2| will range from 80 to 100 degrees wherein υ1 denotes an angle between the vibration direction (4) of a linearly polarized light (3) which is visible light and has the same plane of vibration and the slow axis direction of the first optical phase difference compensation plate (1) when the linearly polarized light (3) enters the second optical phase difference compensation plate (2), and υ2 denotes an angle between the vibration direction of the linearly polarized light (3) entering the second optical phase compensation plate (2) and the slow axis direction of the second optical phase difference compensation plate (2). Thus a laminated phase plate with an improved function is provided realizing a reflection liquid crystal display which has an excellent visibility or a projection liquid crystal display which has a high efficiency.</p> |
