Electronic sunglasses.

摘要

Herein disclosed are a pair of electronic sunglasses (1) making use of the electrooptic effect of a liquid crystal. The sunglasses comprise a pair of liquid crystal panels of twist nematic type each made of a substrate of a synthetic resin for forming a transmittance-variable portion. The liquid crystal panels have a twist angle of an orientation of 60 DEG to 80 DEG or 100 DEG to 120 DEG . Further comprised are a pair of polarizing plates applied to the liquid crystal panels and having their axes of absorption or polarization aligned with the angle of orientation of said liquid crystal panels. The smaller one of the angles formed between the axes of polarization of the objective polarizing plates of the liquid crystal panels for the right and left eyes is less than 45 DEG . A solar cell (2) acts as a power source for driving the liquid crystal panels.