JPS57147575A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPS57147575A JPS57147575A JP3206881A JP3206881A JPS57147575A JP S57147575 A JPS57147575 A JP S57147575A JP 3206881 A JP3206881 A JP 3206881A JP 3206881 A JP3206881 A JP 3206881A JP S57147575 A JPS57147575 A JP S57147575A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- formula
- display element
- crystal display
- alkyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
PURPOSE: A guest-host type liquid crystal display element that is made by filling the space between a couple of transparent electrode base plates with a liquid crystal composition containing a specific red pigment, thus showing high contrast by use of the dichromatic pigment with high dichromatic ratio and light resistance and long life as well.
CONSTITUTION: The objective liquid crystal display element is obtained by filling the space between a couple of electrode base plates, of which at least one is transparent, with a liquid crystal containing a red pigment of formulaI[R is H, alkyl, substituted alkyl, alkoxy, substituted alkoxy, alkylthio, substituted alkylthio, aryl, aralkyl, aryloxy, arylthio, aralkylthio, aralkyloxy, halogen, formula II (R1, R2 are H, alkyl, substituted alkyl, aryl, aralkyl); formula II may be piperidino, piperazino, morpholino, pyrrolidino; X is O, S]. The above pigment is prepared by reaction of 2,6(7)-dibromo-1,4,5,8-tetrahydroxyanthraquinone of formula III with a compound of formula IV.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3206881A JPS57147575A (en) | 1981-03-06 | 1981-03-06 | Liquid crystal display element |
JP10497290A JPH03137164A (en) | 1981-03-06 | 1990-04-20 | Anthraquinone compound |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3206881A JPS57147575A (en) | 1981-03-06 | 1981-03-06 | Liquid crystal display element |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10497290A Division JPH03137164A (en) | 1981-03-06 | 1990-04-20 | Anthraquinone compound |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57147575A true JPS57147575A (en) | 1982-09-11 |
JPH03433B2 JPH03433B2 (en) | 1991-01-08 |
Family
ID=12348553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3206881A Granted JPS57147575A (en) | 1981-03-06 | 1981-03-06 | Liquid crystal display element |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57147575A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59172548A (en) * | 1983-03-23 | 1984-09-29 | Hitachi Ltd | Anthraquinone dye and liquid crystal composition |
JPS59182878A (en) * | 1983-04-01 | 1984-10-17 | Hitachi Ltd | Liquid crystal composition |
JPS6151062A (en) * | 1984-08-20 | 1986-03-13 | Nippon Kayaku Co Ltd | Anthraquinone compound and liquid crystal composition containing same |
US4689171A (en) * | 1982-05-03 | 1987-08-25 | Bayer Aktiengesellschaft | Anthraquinone dyestuffs, their preparation and use and dichroic material containing these anthraquinone dyestuffs |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5647478A (en) * | 1979-09-21 | 1981-04-30 | Bbc Brown Boveri & Cie | Liquid crystal mixture for electrooptical display device |
JPS56161488A (en) * | 1980-04-18 | 1981-12-11 | Bayer Ag | Liquid crystal substance containing anthraquinone dye |
JPS5773067A (en) * | 1980-07-29 | 1982-05-07 | Secr Defence Brit | Material suitable for guest-host liquid crystal device and liquid crystal electric- optical device |
-
1981
- 1981-03-06 JP JP3206881A patent/JPS57147575A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5647478A (en) * | 1979-09-21 | 1981-04-30 | Bbc Brown Boveri & Cie | Liquid crystal mixture for electrooptical display device |
JPS56161488A (en) * | 1980-04-18 | 1981-12-11 | Bayer Ag | Liquid crystal substance containing anthraquinone dye |
JPS5773067A (en) * | 1980-07-29 | 1982-05-07 | Secr Defence Brit | Material suitable for guest-host liquid crystal device and liquid crystal electric- optical device |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4689171A (en) * | 1982-05-03 | 1987-08-25 | Bayer Aktiengesellschaft | Anthraquinone dyestuffs, their preparation and use and dichroic material containing these anthraquinone dyestuffs |
JPS59172548A (en) * | 1983-03-23 | 1984-09-29 | Hitachi Ltd | Anthraquinone dye and liquid crystal composition |
JPH049190B2 (en) * | 1983-03-23 | 1992-02-19 | ||
JPS59182878A (en) * | 1983-04-01 | 1984-10-17 | Hitachi Ltd | Liquid crystal composition |
JPH0466914B2 (en) * | 1983-04-01 | 1992-10-26 | Hitachi Seisakusho Kk | |
JPS6151062A (en) * | 1984-08-20 | 1986-03-13 | Nippon Kayaku Co Ltd | Anthraquinone compound and liquid crystal composition containing same |
JPH0339554B2 (en) * | 1984-08-20 | 1991-06-14 | Nippon Kayaku Kk |
Also Published As
Publication number | Publication date |
---|---|
JPH03433B2 (en) | 1991-01-08 |
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