A blue-phase liquid crystal lens array with nested square ring electrodes

Abstract

The invention discloses a square-annular electrode nested blue phase liquid crystal lens array, comprising an upper substrate, a blue phase liquid crystal layer, a transparent high dielectric layer and a lower substrate; the upper substrate is composed of an upper glass substrate and an upper plane transparent electrode; and the lower substrate is composed of a square-annular transparent electrodeI, a square-annular transparent electrode II and a lower glass substrate. Potential difference is produced between the square-annular transparent electrode I and the square-annular transparent electrode II, thus gradient refractive index distribution is formed in the liquid crystal layer, and focusing effect is achieved. By changing voltages applied to the square-annular transparent electrode I and the square-annular transparent electrode II, focal length of the blue phase liquid crystal lens array can be adjusted. The square-annular electrode nested blue phase liquid crystal lens array disclosed by the invention can effectively eliminate a gap between adjacent lens elements, thus leakage of optical information is reduced; besides, a manufacturing process of the blue phase liquid crystallens array is simple and polarization-independent.

Description

technical field [0001] The invention relates to the field of liquid crystal lenses, in particular to a blue-phase liquid crystal lens array with square annular electrodes nested. Background technique [0002] Due to the fixed optical power of the current traditional lens, the focal plane of the projected virtual image in the head-mounted augmented reality (AR) device is inconsistent with the real object, and the user needs to constantly adjust the lens, which causes visual fatigue. In order to solve this problem, adaptive optical components such as liquid crystal lenses and liquid lenses have been proposed one after another. Compared with liquid lenses with large volume and high power consumption, liquid crystal lenses have the advantages of being compact, lightweight, and economical, so they are more promising to be used in portable AR systems. However, conventional nematic liquid crystal lenses are not suitable for AR displays due to polarization dependence. [0003] Blu...

AI Technical Summary

Problems solved by technology

Among them, the blue-phase liquid crystal lens with hole-shaped electrodes has a simple manufacturing process, has a fast response time, and is polarization-independent, but it will damage the image quality; the blue-phase liquid crystal lens with the multi-electrode structure always maintains the same focal length when the focal length changes. The parabolic phase distribution is also polarization-independent, but its driving process is more complicated

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