JPS57147575A - Liquid crystal display element - Google Patents

Liquid crystal display element

Info

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
Application number
JP3206881A
Other languages
Japanese (ja)
Other versions
JPH03433B2 (en
Inventor
Yasutaka Shimizu
Hiroto Kenmochi
Toshihiko Ueno
Kazutsuka Tani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Sumitomo Chemical Co Ltd
Original Assignee
NEC Corp
Sumitomo Chemical Co Ltd
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Sumitomo Chemical Co Ltd, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3206881A priority Critical patent/JPS57147575A/en
Publication of JPS57147575A publication Critical patent/JPS57147575A/en
Priority to JP10497290A priority patent/JPH03137164A/en
Publication of JPH03433B2 publication Critical patent/JPH03433B2/ja
Granted legal-status Critical Current

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
JP3206881A 1981-03-06 1981-03-06 Liquid crystal display element Granted JPS57147575A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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