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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:08 |
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Conference: Bucharest University Faculty of Physics 2015 Meeting
Section: Polymer Physics
Title:
Electro-Optic Response of Liquid Crystal Cells Obtained in DC Polymerization Reactor
Authors:
Bogdan BUTOI(1,2,3), Dumitru STAICU(1), Daniel Costin STEFAN(1,2), Diana NEAGU(1,2)
Affiliation:
1) Faculty of Physics, University of Bucharest
2) Plasma Physics Students Club, Faculty of Physics
3) National Institute for Lasers, Plasma and Radiation Physics
E-mail
bogdan.butoi@g.unibuc.ro
Keywords:
liquid crystal, LCD, DC polymerization reactor, duromer film, polyaniline
Abstract:
For the general public, the most important aspect in choosing a liquid crystal display is the resolution, the capacity to have a clear picture where the individual pixels cannot be seen with the naked eye. Another key aspect in making the displays is the refresh rate. These dictate with what speed the LCD changes the image. In general, most displays use a refresh rate of 60Hz (once every 16 ms). In this work, we present a DC polymerization reactor used to obtain thin duromer films to enhance the electro-optical response of the liquid crystal (LC) and the response time of the LC cells. We present a comparison between a control sample and LC cells with polyaniline and polypyroll thin films deposited in the polymerization reactor to show how the response rate can be enhanced. The duromer films are analyzed with SEM and AFM to see the morphological structure of the surface before the cells were built. We used a He-Ne laser which was passed through the cells to analyze the optical response and a function generator to polarize them. The signal was acquired with a photodiode and all the data was collected through a acquisition board to a computer, where the graphs were plotted and analyzed.
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