Properties of the phase-change guest-host-mode liquid crystal display

Jin-Jei Wu; Tzu-Yang Lee; Shu-Hsia Chen

doi:10.1117/12.311052

17 June 1998 Properties of the phase-change guest-host-mode liquid crystal display

Jin-Jei Wu, Tzu-Yang Lee, Shu-Hsia Chen

Proceedings Volume 3421, Display Technologies II; (1998) https://doi.org/10.1117/12.311052
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

Abstract

We study the electrooptical properties of the phase-change- guest-host (PCGH) mode liquid crystal display. The PCGH material is a mixture od dye, chiral dopen, and nematic liquid crystal. The material is spread between two glass substrates which have previously been coated with a thin transparent conducting layer and a homeotropic alignment layer. Samples with various thickness-to-natural pitch ratio d/p₀ are fabricated. For each sample, the scroll-to- focal conic texture transition field E_c,c, the cholesteric-nematic phase transition field E_CN and the nematic-cholesteric phase transition field E_NC are measured. Experimental results show that the value of E_CN can fit de Gennes theory well when d/p₀ >= 3.7. Then we measure the ON- and OFF-state transmittance and the response time vs. d/p₀ for each sample. It is found that for d/p₀ >= the d/p₀ ratio can hardly affect the transmittances but affect the response time of the sample film.

Citation Download Citation

Jin-Jei Wu, Tzu-Yang Lee, and Shu-Hsia Chen "Properties of the phase-change guest-host-mode liquid crystal display", Proc. SPIE 3421, Display Technologies II, (17 June 1998); https://doi.org/10.1117/12.311052

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