An electronically controlled liquid crystal light-diffusing microlens array chip based on graphene electrodes

Abstract

The invention discloses an electric control liquid-crystal light divergence microlens array chip on the basis of graphene electrodes. The electric control liquid-crystal light divergence microlens array chip comprises a driving control signal input port and a graphene liquid-crystal light divergence microlens array, the graphene liquid-crystal light divergence microlens array comprises m*n of elements and is of liquid-crystal interlayer structure, a first substrate, a patterning graphene electrode, a first liquid crystal direction layer, a liquid crystal layer, a second liquid crystal direction layer, a graphene electrode and a second substrate are sequentially arranged between the lower layer and the upper layer, the patterning graphene electrode and the graphene electrode are manufactured on the first substrate and the second substrate respectively, the patterning graphene electrode is composed of m*n of micro circular graphene which are isolated by microloops and connected by microlines and are distributed in order, and the patterning graphene electrode and the graphene electrode extend to form a metal electrode lead respectively. The electric control liquid-crystal light divergence microlens array is long in device service life and high in reliability, can be easily coupled with a conventional optic photoelectric mechanism structure, and is high in environment suitability and the like.

Description

technical field [0001] The invention belongs to the technical field of optical precision measurement and control, and more specifically relates to an electronically controlled liquid crystal light divergence microlens array chip based on graphene electrodes. Background technique [0002] In recent years, electronically controlled liquid crystal microlens technology has developed rapidly, in the aspects of electronically controlled convergence, divergence, shaping, collimation, focusing, focusing, coupling and even integration with photosensitive arrays and LED arrays, and construction of special light functional structures. , showing good prospects for development. The typical functions that have been presented include: (1) Applying electric driving control signals on the arrayed liquid crystal microstructure, the light convergence, light divergence, or characteristic phase transformation that can be performed can be expanded, solidified, or modulated in any beam state (2) ...

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Problems solved by technology

[0003] So far, based on the precious metal alloy film electrode to build a space electric field in the liquid crystal material with a thickness of micron, the defects of controlling the liquid crystal to perform light control treatment are mainly manifested in the following aspects: (1) The electrode based on the film alloy material must have sufficient thickness to carry It is used to excite the positive and negative space charge regions of the thin layer of the space electric field loaded on the liquid crystal material, so that the liquid crystal molecules present a specific dipole spatial arrangement; The large surface impedance makes the micron-scale deep space electric field excited between the patterned surface electrode pairs in the device have spatial inhomogeneity based on configuration; (3) The film alloy electrode has a strong thermal effect, and the long-term thermal Accumulation will inhibit the activity of liquid crystal molecules distributed near the initial orientation structure of the liquid crystal, reduce the efficiency of liquid crystal molecule orientation arrangement under the action of electric drive control and the corresponding electric control dielectric capacity, and will further increase the impedance of the metal electrode, affecting the performance of the device. Electrically controlled response sensitivity; (4) The film alloy electrode presents narrow-band optical gating and spectral transmission inhomogeneity; (5) The electrons driven by the electric field to increase the energy state will overflow from the metal film electrode and penetrate the initial orientation structure of the liquid crystal After the electrons enter the liquid crystal material, they neutralize the polar groups of the liquid crystal molecules to reduce the dielectric capacity of the liquid crystal material; (6) The price of precious metal alloy materials is high, and there is environmental pollution in the production of materials and liquid crystal devices.

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