Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1997-05-19
1999-07-13
Kelly, C. H.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
25229901, 349143, 349182, C09K 1952, C09K 1932, G02F 1133
Patent
active
059222425
ABSTRACT:
An LCD which having a high response speed, a wide viewing angle and a high contrast and capable of displaying high-quality gray-scale images at normal temperature. The LCD comprises an array substrate, a counter substrate opposing the array substrate, pixel electrodes arranged on the the array substrate in rows and columns, each connected to an active element, a first orientation film provided on the pixel electrodes, a counter electrode opposing the pixel electrodes, arranged on the counter substrate, a second orientation film provided on the counter electrode, rubbed in a direction slightly inclined to a direction in which the first orientation has been rubbed, and a layer of antiferroelectric liquid crystal sealed in a gap between the first and second orientation films, the antiferroelectric liquid crystal being a smectic liquid crystal which contains an antiferroelectric liquid crystal compound represented by R.sup.1 (O)--Zm--Y--E--COO--C*HX--R.sup.4. The liquid crystal exhibits transmittance which increases monotonically with applied voltage and exhibits a memory margin M ranging from -1 to 0 at normal temperature. The memory margin M is given as M=(V.sub.10 -V'.sub.90)/(V.sub.90 -V.sub.10).
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A. Fukuda; "Pretransitional Effect in AF-F Switching: To Suppress It or to Enhance It, That is My Question about AFLCDs" Asia Display '95, pp. 61-64, (1995).
Hama Hideo
Saishu Tatsuo
Sakai Yukari
Takatoh Kohki
Kabushiki Kaisha Toshiba
Kelly C. H.
Mitsui Chemicals Inc.
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