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Abstract

A phase shift element formed on the outer surface of a glass substrate is formed of an organic PAS film, with a refractive index of approximately 1.5. There is atmospheric air (with a refractive index of 1.0) between the phase shift elements. A thickness of the phase shift element is set at 550 nm, a value obtained by substituting 550 nm for a center wavelength and 0.5 for .DELTA.n in D1 .DELTA.n=center wavelength/2. A phase shift element formed on the inner surface of the glass substrate is an SiN layer (with a refractive index of approximately 2.0). A substance between the phase shift elements is a flattened film which has a heatproof temperature of 600 degrees centigrade or above, a low refractive index, and flattened effect. A thickness of the flattened film may be equal to or larger than a thickness of the phase shift element and thus is set at 550 nm. Through installation of the phase shift elements having a lens effect, light of a back light is efficiently condensed on an aperture part of a pixel, thereby improving the condensation efficiency at the aperture part and increasing an amount of light transmitted through a liquid crystal display panel.

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First Claim