DAP mode liquid crystal display device
AssigneePioneer Electronic Corporation
InventorsMasayuki Iwasaki, Kimiaki Sato, Akira Sugimoto
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Abstract
A liquid crystal composition for use in a DAP mode liquid crystal display device of a homeotropic structure type contains at least one kind of predetermined tolan derivative. The liquid crystal composition is used for a liquid crystal display device of an active-matrix drive type. The liquid crystal composition is also used for a projection type display. The content of the predetermined tolan derivative is in a range of 3 wt % to 20 wt %.
Claims8
A DAP mode liquid crystal display device of a homeotropic structure type, comprising a nematic liquid crystal composition with a negative dielectric constant anisotropy, wherein said nematic liquid crystal composition contains a tolan derivative represented by the following general formula:
- ##STR3## where n represents an integer from 0 to 4.
A DAP mode liquid crystal display panel of a homeotropic structure type, comprising:
- a pair of transparent substrates;
- transparent electrodes formed on the substrates;
- alignment films formed on the electrodes;
- and
- a liquid crystal composition sandwiched between the alignment films, wherein the liquid crystal composition has a negative dielectric constant anisotropy, wherein said liquid crystal composition consists of a nematic liquid crystal and a tolan derivative represented by the following general formula:
- ##STR4## where n represents an integer from 0 to 4.
Dependencies are inferred from the claim text.