| 摘要 |
PROBLEM TO BE SOLVED: To effectively utilize light from a light source and to control the decrease of a contrast due to external light in a liquid crystal display. SOLUTION: Unpolarized light from a light source device 12 is made incident on a liquid crystal cell 16 via a circularly polarized light separating layer 14. The liquid crystal cell 16 varies the retardation value corresponding to the application of an electric field and essentially shifts the phase of the light from π/2 to -π/2 or from -π/2 to π/2, modulating the circularly polarized incident light into a linearly polarized light, making the resulting light incident on the dichroic linearly polarizing layer 18 on the surface and making only the component which coincides with its polarizing transmission axis exit outwards. The dichroic linearly polarizing layer 18 transmits 50% of the incident external light and absorbs the remainder. |
