Optical apparatus, image display, and liquid crystal display

Abstract

An optical apparatus that prevents unevenness in color and brightness from occurring in an image display, and can improve the color purity of transmitted light and color reproducibility of the image display and is excellent in practical use. An optical apparatus that includes a light source device; a reflective layer; a color purity improving sheet; and a reflective polarizer. The color purity improving sheet includes a light-emitting layer which improves purity of a color in a target wavelength range by absorbing light in a specific wavelength range other than the target wavelength range and converts the absorbed light to emitted light in the target wavelength range. Light emitted from the light source device exits through the reflective polarizer to the outside. The color purity improving sheet is disposed between the reflective polarizer and the reflective layer. The light source device is disposed in a location between the color purity improving sheet and the reflective layer.

Dependencies are inferred from the claim text.