When going out in the daytime, under the action of ultraviolet in the sun, voltage is applied to the liquid crystal cell, the liquid crystal molecule is twisted, and the gradual polarizing film has the function of polarizing closing and blocking. The overall depth of the lens is further deepened according to the order of the color depth of the upper part and the light color of the lower part. The lens can be used as sunglasses When the LCD box is powered off after strong light, the lens will return to transparent state, and the design of upper dark and lower bright will not affect the visibility of the wearer at night. In case of strong light, the LCD box will be powered to change the lens color from transparent state to dark and lower light shading state, so as to block the strong light of the vehicle, reduce the glare, and enable the driver to see the road clearly. It can soften the light entering the eyes and protect the eyes.

　　The electrochromic polarizing lens has the dual functions of blocking sunlight in the daytime and blinding light at night, and can be used all day long. At the same time, it has the advantages of simple manufacturing process, low cost and strong practicability.