Liquid Crystal Mixtures with Low Birefringence for Active-Matrix LCD

Autor:	Yoshinori Iwashita, Sadao Takehara, Haruyoshi Takatsu, Yasuo Umezu, Kiyofumi Takeuchi, Shotaro Kawakami, Tetsuo Kusumoto
Rok vydání:	2004
Předmět:	Liquid-crystal display Birefringence Materials science business.industry Transition temperature Analytical chemistry General Chemistry Condensed Matter Physics Durability Active matrix law.invention Optics law Liquid crystal Phase (matter) General Materials Science business Voltage
Zdroj:	Molecular Crystals and Liquid Crystals. 411:41-48
ISSN:	1563-5287 1542-1406
DOI:	10.1080/15421400490434559
Popis:	The liquid crystal (LC) mixtures with fused ring systems such as Decahydronaphthalenes and Tetrahydronaphthalenes for reflective or transflective active-matrix liquid crystal display (AM-LCD) have higher durability than LC mixtures with ester-components. These LC mixtures also have some problems such as low nematic-isotropic transition temperature TNI and high driving voltage. The improvement for driving voltage was carried out by using Tetrahydronaphthalene-component with moderate birefringence Δn and large dielectric anisotropy Δ˜. However, It was difficult to obtain LC mixtures with sufficiently low driving voltage, because of low TNI and the comparatively high Δn of tetrahydronaphthalene. We have improved these problems by introducing some newly developed LC components and optimization. We obtained the LC mixtures with low Δn and low driving voltage; less than 0.075 of Δn and about 4 V or less of driving voltage. These LC mixtures have high durability with stable nematic phase at low temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::08846afb2e3afcb58c108c8fd4de80a5 https://doi.org/10.1080/15421400490434559 Zobrazit plný text záznamu