Electric-control liquid crystal microlens array capable of achieving focus adjustment and swing and preparation method thereof

Abstract

The invention discloses an electric-control liquid crystal microlens array capable of achieving focus adjustment and swing. The electric-control liquid crystal microlens array comprises an upper glass substrate, a PI alignment layer, an upper glass substrate ITO transparent electrode, a liquid crystal layer, a plurality of glass spacers, a lower glass substrate and a lower glass substrate ITO transparent electrode. The reverse face of the upper glass substrate is plated with the ITO transparent electrode, and the front face of the lower glass substrate is plated with an ITO transparent electrode. The ITO transparent electrode on the reverse face of the upper glass substrate is provided with four stacked sub electrodes which are separated by silicon dioxide layers and can be subjected to power-up control respectively. The patterns on the four stacked sub electrodes on the reverse face of the upper glass substrate are in a strip type array. The four perpendicular symmetrically-distributed sub electrode arrays form a circular hole array. The PI alignment layer is plated on the ITO transparent upper electrode of the upper glass substrate and the ITO transparent lower electrode of the lower glass substrate. The technical problem that a circular hole liquid crystal microlens array cannot achieve electric-control focus swing in the prior art is solved.

Description

Technical field [0001] The invention belongs to the technical field of liquid crystal lenses, and more specifically, relates to an electrically-controlled adjustable focus and tilt-focus liquid crystal micro lens array and a preparation method thereof. Background technique [0002] With the widespread application of liquid crystals in the field of displays, researchers from various countries have found that liquid crystal materials are good optoelectronic materials, and are particularly susceptible to changes in dielectric constant and refractive index due to external conditions. Under certain conditions, they can be formed on a flat liquid crystal layer. Gradient refractive index distribution. Researchers use this feature to develop an adaptive microlens based on liquid crystal. This lens not only has the characteristics of a gradient index lens, but also has the characteristics of electronically controlled focal length. It is a new type of optical imaging element with outstandi...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the improvement needs of the existing technology, the present invention provides an electronically controlled adjustable focus and swing focus liquid crystal microlens array, and its purpose is to solve the problem that each unit of the circular hole array liquid crystal microlens cannot focus in the existing liquid crystal microlens technology. Difficulties in practical application

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