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ABSTRACT
Polymer Dispersed Liquid Crystal (PDLC) films have been widely used as electronically controlled dimming technology, and solving the problem of narrow angle of PDLC is a cutting-edge challenge for their application. In this paper, a theoretical model of the viewing angle characteristics of PDLC is constructed, and the corresponding samples are experimentally fabricated. It is found that the simulation results of transmittance changing with the viewing angle are in good agreement with the experimental results. Furthermore, the technical approaches to improve PDLC viewing angle characteristics and achieve a wide viewing angle are discussed theoretically. The results show that the PDLC films for wide viewing angle can be obtained by using liquid crystal materials with smaller anisotropy of refractive index and polymer materials with refractive index slightly higher than the ordinary refractive index of liquid crystal.
GRAPHICAL ABSTRACT
Acknowledgments
This work was supported by the Innovation Method Fund of China [Grant Number 2020IM020600]; the Industry-University Cooperative Education Project of Ministry of Education of China [Grant Number 202102026001]; the Research Projects of Undergraduate Education and Teaching Reform in Hebei University of Technology [Grant Number 201903006]; the Higher Education Teaching Research Program of Hebei Society of Higher Education [Grant Number GJXH2019-019]; and the Natural Science Foundation of China [Grant Number 51805142].
Disclosure statement
No potential conflict of interest was reported by the author(s).