Evaluation of Polymer Dispersed Liquid Crystal (PDLC) for Passive Rear Projection Screen Application

Abstract

In the past few years, there have been many attempts to commercialize Polymer Dispersed Liquid Crystal (PDLC) for Rear Projection Screen (RPS) in electrically switchable films and glass products. This application is based on the exceptional image quality of PDLC at a wide viewing angle. However, due to the high price of conventional switchable PDLC privacy glass, the integration of RPS in PDLC failed to attract large multimedia and entertainment markets. An obvious solution to this problem is the independent development and evaluation of PDLC for Passive Rear Projection Screen (PRPS) application. However, in order to approve the application of PDLC for this purpose, further optical and image (visual) analyses are required. This work is the first part of our research project on evaluation of PDLC for RPS application, where we studied the effect of material and process parameters on optical properties of passive PDLC screens. The results indicate a strong dependence of the performances of passive PDLC screen on the material and process parameters, though it offers great

Internet of things-enabled smart controller for polymer dispersed liquid crystals films

“…Int J Elec & Comp Eng ISSN: 2088-8708  and to allow the flow of natural daylight into the room when incorporating it into hospital wards [9]. When installed onto the windows of automobiles, PDLC films can protect the passengers from the external infrared radiation emitted by the Sun hence providing more comfort [10], [11]. PDLC exists in the form of film that is sandwiched in between glasses to form a smart glass [12].…”

Metallomesogens as potential materials for improvement of electro-optical properties of commercial liquid crystals

“…Also, few scientific and patent literature have reported on some rod-like and discotic MOMs as dichroic dyes, non-linear optics, thermal recording, thermochromism, passive optical filters, photo-sensing, laser addressing, optical and thermal recording, polarizing flms, radiation absorbing films, ferroelectricity, ferro-magneticity, electro-conductivity, reaction catalysts, mesogenic intermediates, ink jet and security printing, medicinal and agricultural materials. [21][22][23][24][25][26][27][28][29][30] In spite of these proposed applications, until now MOM material have not been yet appeared for even simple commercial guest-host liquid crystal devices. Among the major draw backs of existing MOMs are their high transition temperatures, decomposition at high temperature, inaccessible mesophase range and low chemical stability.…”

Reverse Mode Polymer Dispersed Liquid Crystal-based Smart Windows: A Progress Report

“…As pointed out by the Emergen Research [6], although an electrochromic smart window is still the first choice for the development of electrosmart windows, polymer dispersed liquid crystals (PDLCs) have gradually occupied a certain market share as they are characterized by fast response speed, high heat resistance, and wide temperature range (Figure 1b). The use of PDLCs has rapidly increased as they are used in buildings, projection screens, and luxury vehicles [7,8].…”