<title>Addressing factors for polymer-dispersed liquid-crystal displays</title>

Polymerization-Induced Phase Separation. 2. Morphology of Polymer-Dispersed Liquid Crystal Thin Films

“…This allows a better control of morphology. The switching properties of these materials depend strongly on a variety of parameters such as UV intensity, LC concentration, curing temperature, cross-link density, etc. ,− Morphology is considered to be a key parameter for the electro-optical behavior of such materials. − Much work has been done to optimize the switching properties, to get a high contrast at a low switching voltage, a high switching speed, and a low hysteresis. ,,− ,− This is very difficult, not only because of the large number of parameters involved but also due to the large number of components: practical systems usually contain a mixture of many different LC compounds and several monomers and oligomers. ,,, We have simplified the problem by choosing a model system which consists of only one liquid crystal and one monomer. The LC is 4- n -pentyl-4‘-cyanobiphenyl (K15) and the monomer is tetraethylene glycol diacrylate (TEGDA).…”

“…The switching properties of these materials depend strongly on a variety of parameters such as UV intensity, LC concentration, curing temperature, cross-link density, etc. 2,[4][5][6][7][8][9][10][11][12] Morphology is considered to be a key parameter for the electro-optical behavior of such materials. [4][5][6][7][8][9][10][11][12] Much work has been done to optimize the switching properties, to get a high contrast at a low switching voltage, a high switching speed, and a low hysteresis.…”

“…2,[4][5][6][7][8][9][10][11][12] Morphology is considered to be a key parameter for the electro-optical behavior of such materials. [4][5][6][7][8][9][10][11][12] Much work has been done to optimize the switching properties, to get a high contrast at a low switching voltage, a high switching speed, and a low hysteresis. 2,4,[6][7][8][9][13][14][15] This is very difficult, not only because of the large number of parameters involved but also due to the large number of components: practical systems usually contain a mixture of many different LC compounds and several monomers and oligomers.…”

Ultra-Bright Heads-Up Displays Using a Method of Projected Color Images by Combination of LEDs and Polymer-Dispersed Liquid Crystals

“…As is widely known, different parameters of the PDLC result in varying electro-optical performance [17], [20]. The PDLC performance is highly dependent on fabrication conditions.…”

“…In fact, some previous research has indicated that higher monomer concentration results in a quicker response time. The response time for 40% monomer PDLC is considered slow, which is why we started with a 50% monomer [20]. We fixed the UV curing intensity at 4.5 mW/cm and the cell gap size to 12 m. In Fig.…”