Device and method for controlling intermediate state of polymer dispersed liquid crystal

Abstract

The invention discloses a device and a method for controlling an intermediate state of polymer dispersed liquid crystal. The device comprises a laser light source for test, a chopper, a semi-transparent half mirror, a sample platform, a silicon photocell, a lock-in amplifier, an ultraviolet source and a computer terminal; the ultraviolet source is controlled to open by using the computer terminal, then emitted laser is reflected on the semi-transparent half mirror via the chopper by using the laser light source for test; the laser reflected by the semi-transparent half mirror irradiates the sample, and then the silicon photocell is utilized for probing the light intensity of the laser after penetrating through the sample, converting light energy into electric energy and measuring the voltage of the silicon photocell by using the lock-in amplifier; the measured voltage is transmitted to the computer terminal, and finally the ultraviolet source is controlled to close by using the computer terminal according to the received voltage, so that the photo polymerization process can be automatically finished. The computer terminal is utilized for carrying out data treatment and program control, so that the operation is convenient and the realization process is simple and fast.

Description

technical field [0001] The invention relates to a technology for controlling polymer dispersed liquid crystals, in particular to a device and method for controlling the intermediate state of polymer dispersed liquid crystals. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC, Polymer Dispersed Liquid Crystal) film has attracted people's attention since the 1980s. After a lot of research, it has been applied to many fields such as smart glass, large-screen display, and holographic grating. Now polymer-dispersed liquid crystals are still an important research direction of liquid crystal devices. However, most of the current research results are concentrated on fully cured devices of polymer-dispersed liquid crystals, and there are few studies on the intermediate process of polymerization (ie, the intermediate state). [0003] The invention patent "polymer dispersed liquid crystal calendering effect drawing board and its preparation method and application" a...

AI Technical Summary

Problems solved by technology

According to the content of the patent document, the key means of the preparation method is essentially the control of the intermediate state of the polymer dispersed liquid crystal, and the timing of the control directly affects the quality of the prepared sample. Due to technical problems, the The control of the intermediate state is carried out manually by means of experience, so the prepared samples have the problem that the performance indicators cannot be unified, and it is difficult to realize commercialization. Therefore, in order to better realize the production of products similar to the intermediate state, it is necessary to design an aggregation Process automatic control technology to realize the automation of preparing polymer-dispersed liquid crystal intermediate products

Images