20 May 1999 HDTV projection display based on high-efficiency optically addressed PDLC light valves
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Abstract
The polymer-dispersed liquid crystal (PDLC) films of the optically addressed light valves in the high-definition television (HDTV) projection display described here can modulate unpolarized light with high spatial resolution as well as with a high optical efficiency based on the light scattering effect. A PDLC film suitable for use in HDTV projection display was developed by evaluating the microscopic spatial light modulation and polymer-network morphological properties of test films prepared using various curing conditions for photopolymerization-induced phase separation. Films produced under optimum curing conditions have a fine polymer-network structure appropriate for films used in the light valves of a HDTV projection display. Our prototype full-color HDTV projection display using three PDLC light valves provides a resolution of 850 TV lines, a brightness greater than 1800 ANSI lumens, and a maximum contrast ratio of 100:1.
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Hiroshi Kikuchi, Takanori Fujii, Masahiro Kawakita, Hideo Fujikake, Tahito Aida, Kuniharu Takizawa, "HDTV projection display based on high-efficiency optically addressed PDLC light valves", Proc. SPIE 3634, Projection Displays V, (20 May 1999); doi: 10.1117/12.349353; https://doi.org/10.1117/12.349353
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