OPTICAL ELEMENT AND COLOR DISPLAY DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an optical element and a color display device by which the performance of luminance and a viewing angle are improved and the performance of chromaticity also can be improved by performing the correction of the viewing angle and the emphasis of front luminance or the emphasis of a degree of diffusion.

SOLUTION: The optical element which is a film-like optical element for correcting the angle of light to a prescribed direction is constituted of two materials 20, 21 between which a difference of refractive indexes is at least 0.1. One material 20 constitutes a plurality of light guides causing total reflection on a boundary with the other adjacent material 21, these light guides 22 are formed so as not to be arrayed at equal intervals or so as to have respectively different cross-sectional areas and the ratio of the width or diameter of an incident part of each light guide to the film thickness of the optical element 15 is at least 1:10.

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