Dichroic coloring agents for liquid crystal displays
US4883611A · kind A · utility
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16References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1988 |
| Grant date | Nov 28, 1989 |
| Priority date | — |
| Expiry date | Sep 9, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B1/58
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dichroic coloring agents which have a blue to blue-violet hue and have not been used to date for liquid crystal displays are disclosed. These coloring agents are represented by the following formula: ##STR1## wherein X is S or NH; R.sub.1 is a hydrogen atom, halogen atom, alkyl group or alkoxy group; and R.sub.2 is a hydrogen atom, alkyl group, aryl group or aralkyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.