OPTICAL ELEMENT, MANUFACTURING METHOD OF OPTICAL ELEMENT, AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To develop an optical element having a light emitting means which prevents transmission light from being scattered by a recessed side surface, has excellent front directional characteristics by effectively converting an optical path of lateral incident light into a vertical direction, and is hard to generate scattered light or moire.

SOLUTION: The optical element comprises a light emitting means having a plurality of recesses discontinuously distributed on one side of a transparent base substrate. Each recess has an optical path converting slant surface and an opposing surface smaller in area than the optical pass converting slant surface. A manufacturing method of the optical element comprises a step for forming the light emitting means by repeating a step of forming a recess on the transparent substrate by laser etching. A manufacturing method of the optical element comprises a step for using the optical element as a mold to form an electroformed flask and transferring the shape of the flask to the substrate. A liquid crystal display device arranges the optical device on at least one side of a liquid crystal cell on a liquid crystal display panel.

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