Korea Polymer Journal, Vol.6, No.4, 312-317, October, 1998
High-Brightness Projector Using a Thin Film Translistor-Polymer Dispersed Liquid Crystal Light Valves
The polymer dispersed liquid crystal (PDLC) having continuous liquid crystal domains in a three dimensional spongy-like polymer network shows a light transmission-light scattering upon electric field ON and OFF, respectively. The PDLC film can be used as alight valve for an active matrix display. The driving voltage of the PDLC was below 6 volt, low enough to be driven by thin film transistor(TFT). The electro-optical properties of the PDLC film strongly depended on the temperature of panel and the physical properties of the polymer matrix. A real moving picure-projector was developed by using the 3.1'' amorphous silicon TFT-PDLC light valves. The brightness of the projector was about two times higher than that of TN-TFT projector.
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