A liquid crystal-based electromagnetic protective film capable of electronic control and reconfiguration and its preparation method

Abstract

The present invention discloses a liquid crystal-based electromagnetic protection film capable of electronic control and reconstruction. The liquid crystal-based electromagnetic protection film comprises a first flexible substrate, an aperture array pattern electrode, a first liquid crystal orientation layer, a liquid crystal layer, a second liquid crystal orientation layer, a common electrode, and a second flexible substrate which are arranged in order from top to bottom. The aperture array pattern electrode comprises m*n block electrodes distributed in a matrix mode, each block electrode comprises a plurality of unit holes, the common electrode and the aperture array pattern electrode have completely same block electrode structures, the size of each unit hole in the common electrode is smaller than the size of each unit hole in the aperture array pattern electrode, one metal wire is led out from one side of each block electrode of the aperture array pattern electrode, the other one metal wire is led out from the same side of the block electrode, corresponding to the aperture array pattern electrode, in the common electrode, and the two metal wires are commonly connected with external voltage signals. The technical problems are solved that a current electromagnetic protection material cannot regulate the electromagnetic reflection or transmission capacities with the change ofthe intensity and incident direction of the electromagnetic wave beams.

Description

technical field [0001] The invention belongs to the technical field of precision measurement and control of electromagnetic radiation, and more specifically relates to a liquid crystal-based electromagnetic protective film whose electromagnetic reflectance and transmittance can be electrically controlled and reconfigured and a preparation method thereof. Background technique [0002] At present, in order to improve the electromagnetic protection performance of the electromagnetic sensitive device, it is usually realized by laying functionalized electromagnetic protective materials (for example, coating wave-absorbing material) on the outer surface of the electromagnetic sensitive device. [0003] However, existing electromagnetic protection materials have some defects that cannot be ignored: first, existing electromagnetic protection materials cannot adjust the electromagnetic reflection or transmission capability with changes in the intensity, incident direction, wavefront, ...

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides an electronically controllable and reconfigurable liquid crystal-based electromagnetic protective film and its preparation method. Changes in the intensity, incident direction, wavefront, polarization or spectrum, etc. can adjust the electromagnetic reflection or transmission ability, only applicable to specific electromagnetic frequency bands, poor universality, and technical problems that cannot be used for optical electromagnetic protection and microwave electromagnetic protection at the same time

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