Under the influences of the optical characteristics of the protective cover, the brightness of the apparatus reduces or iridescent unevenness occurs. When the polymer film used in the viewability-improving method of Patent Literature 1 is applied to the liquid crystal display apparatus for a car navigation system, such problems as described below may occur. JP 2011-215646 A SUMMARY OF INVENTION Technical Problemįor example, the display panel of a liquid crystal display apparatus mounted on a car navigation system is covered with a transparent protective cover made of plastic or the like. It is said in Patent Literature 1 that viewability when the screen of the apparatus is observed through polarized sunglasses can be improved by the viewability-improving method of Patent Literature 1. In Patent Literature 1, there is a description of a viewability-improving method in which a white light-emitting diode is used as the backlight of a liquid crystal display apparatus, and a polymer film having a retardation of from 3,000 nm to 30,000 nm is used by being arranged on the viewer side of a polarizer so that an angle formed by the absorption axis of the polarizer and the slow axis of the polymer film may be about 45°. However, when a viewer views a liquid crystal display apparatus in a state of wearing the polarized sunglasses, the display light of the liquid crystal display apparatus is absorbed by the polarized sunglasses depending on the posture of the viewer, and hence the viewability of the apparatus reduces. Sunglasses having polarization characteristics (polarized sunglasses) are used for reducing glare under a strong sunlight environment. The present invention relates to an optical member and a liquid crystal display apparatus including an optical member.

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