Patent ID: 7688399
Filing Date: 2010-03-30
Classification: G02B

Abstract:
1. An image display apparatus comprising: a light source unit; a liquid crystal display panel; an illumination optical system configured to lead the light from the light source unit to the liquid crystal display panel; and a display optical system configured to lead the light from the liquid crystal display panel to an observer, wherein the illumination optical system and the display optical system share an optical surface having dielectric multilayer films laminated thereon and being concave toward the liquid crystal display panel on a plane including a center ray corresponding to an angle of view, the optical surface reflecting the light from the light source unit so as to lead the reflected light to the liquid crystal display panel while transmitting the light reflected from the liquid crystal display panel, and wherein on the plane including the center ray corresponding to an angle of view, the brightness of a light-emitting surface of the light source unit is higher on a side remote from the optical surface than on a side close to the optical surface, and wherein the dielectric multilayer films laminated on the optical surface satisfy the following condition: where the reflectance of the films when S-polarized light with a wavelength 550 nm is incident in the films at an incidence angle of 40° is Rs, and the transmittance of the films when P-polarized light is incident in the films at an incidence angle of 40° is Tp.