JPS55127485A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS55127485A
JPS55127485A JP3333179A JP3333179A JPS55127485A JP S55127485 A JPS55127485 A JP S55127485A JP 3333179 A JP3333179 A JP 3333179A JP 3333179 A JP3333179 A JP 3333179A JP S55127485 A JPS55127485 A JP S55127485A
Authority
JP
Japan
Prior art keywords
liquid crystal
dye
display device
crystal display
polygenetic
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
JP3333179A
Other languages
Japanese (ja)
Other versions
JPS6045677B2 (en
Inventor
Shoichi Matsumoto
Masahiro Kawamoto
Kiyoshi Mizunoya
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP54033331A priority Critical patent/JPS6045677B2/en
Publication of JPS55127485A publication Critical patent/JPS55127485A/en
Publication of JPS6045677B2 publication Critical patent/JPS6045677B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)

Abstract

PURPOSE: To highten contrast and thereby to improve stability to light, by incorporating in the liquid crystal material layer of a liquid crystal display device, a polygenetic dye comprising a mixed system consisting of a pluraity of anthraquinone dyes of different colors and a specific azo group-containing dye.
CONSTITUTION: In a liquid crystal display device having a liquid crystal material layer containing a polygenetic dye, as said polygenetic dye, use is made of a combination of a dye having azo groups as the chromophores and an absorption maximum in a wavelength region of 340W550nm and amixed system consisting of at least two anthraquinone dyes of different colors represented by formulas I and II, wherein X, Y and Z are each R, OR, Cl, NHR or NR2; R is H, alkyl or phenyl, and having an absorption maximum in the wavelength region of 550W740nm. Thereby, a liquid crystal display device which posseses required display performance for a long time is obtained, and black display, which is not obtained by the use of only one dye, is made possible.
COPYRIGHT: (C)1980,JPO&Japio
JP54033331A 1979-03-23 1979-03-23 liquid crystal display device Expired JPS6045677B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54033331A JPS6045677B2 (en) 1979-03-23 1979-03-23 liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54033331A JPS6045677B2 (en) 1979-03-23 1979-03-23 liquid crystal display device

Publications (2)

Publication Number Publication Date
JPS55127485A true JPS55127485A (en) 1980-10-02
JPS6045677B2 JPS6045677B2 (en) 1985-10-11

Family

ID=12383568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54033331A Expired JPS6045677B2 (en) 1979-03-23 1979-03-23 liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS6045677B2 (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308164A (en) * 1980-08-04 1981-12-29 General Electric Company Novel yellow azo dyes and dichroic liquid crystal composition made therewith
US4308163A (en) * 1980-08-04 1981-12-29 General Electric Company Novel yellow azo dyes and dichroic liquid crystal composition made therewith
US4308162A (en) * 1980-12-08 1981-12-29 General Electric Company Novel yellow azo dyes and dichroic liquid crystal compositions made therewith
US4308161A (en) * 1980-08-04 1981-12-29 General Electric Company Novel yellow azo dyes and dichroic liquid crystal compositions made therewith
WO1982002209A1 (en) * 1980-12-22 1982-07-08 Gen Electric Liquid crystal compositions with novel tris-azo dichroic dyes
US4356102A (en) * 1980-10-22 1982-10-26 General Electric Company Dichroic liquid crystal compositions containing anthraquinone-based dyes
JPS5829875A (en) * 1981-07-27 1983-02-22 Nec Corp Liquid crystal composition and liquid crystal color display element
JPS5880371A (en) * 1981-11-09 1983-05-14 Nec Corp Liquid crystal composition and liquid crystal color display element
JPS58109578A (en) * 1981-12-24 1983-06-29 Alps Electric Co Ltd Color liquid crystal display element
JPS58111882A (en) * 1981-12-25 1983-07-04 Alps Electric Co Ltd Color liquid crystal display device
US4405211A (en) * 1980-07-29 1983-09-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Liquid crystal compositions with pleochroic anthraquinone dyes
US4408840A (en) * 1980-09-22 1983-10-11 Hitachi, Ltd. Liquid crystal compositions containing pleochroic anthraquinone dyes, liquid crystal devices containing the compositions, and the dyes
US4477368A (en) * 1981-10-01 1984-10-16 Alps Electric Co., Ltd. Color display liquid crystal composition
US4478739A (en) * 1982-07-16 1984-10-23 Asulab S.A. Dark colored composition based on liquid crystals
US4483593A (en) * 1981-03-20 1984-11-20 Hitachi, Ltd. Guest-host type liquid crystal composition and liquid crystal display device
US4491532A (en) * 1980-09-30 1985-01-01 Siemens Aktiengesellschaft Liquid-crystal mixture with a pleochroic anthraquinone dye, and method for producing such a dye
US4530572A (en) * 1982-12-30 1985-07-23 Minnesota Mining And Manufacturing Company Substituted anthraquinone-type isotropic dyes for liquid crystal display devices
US4550980A (en) * 1981-12-04 1985-11-05 Epson Corporation Liquid crystal composition and display element including same
US4624532A (en) * 1980-10-22 1986-11-25 General Electric Company Dichroic liquid crystal compositions containing anthraquinone-based dyes
US4702561A (en) * 1977-04-11 1987-10-27 Minnesota Mining And Manufacturing Company Pleochroic dyes and electro-optical displays therewith
US4935160A (en) * 1983-03-02 1990-06-19 Merck Patent Gessellschaft Mit Beschrankter Haftung Liquid-crystal guest-host systems
US10131858B2 (en) 2014-09-30 2018-11-20 Kobe Steel, Ltd. Method for manufacturing ashless coal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0336591Y2 (en) * 1985-05-27 1991-08-02

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5056386A (en) * 1973-09-19 1975-05-17
JPS5073887A (en) * 1973-10-31 1975-06-18

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5056386A (en) * 1973-09-19 1975-05-17
JPS5073887A (en) * 1973-10-31 1975-06-18

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702561A (en) * 1977-04-11 1987-10-27 Minnesota Mining And Manufacturing Company Pleochroic dyes and electro-optical displays therewith
US4405211A (en) * 1980-07-29 1983-09-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Liquid crystal compositions with pleochroic anthraquinone dyes
US4308163A (en) * 1980-08-04 1981-12-29 General Electric Company Novel yellow azo dyes and dichroic liquid crystal composition made therewith
US4308161A (en) * 1980-08-04 1981-12-29 General Electric Company Novel yellow azo dyes and dichroic liquid crystal compositions made therewith
US4308164A (en) * 1980-08-04 1981-12-29 General Electric Company Novel yellow azo dyes and dichroic liquid crystal composition made therewith
US4408840A (en) * 1980-09-22 1983-10-11 Hitachi, Ltd. Liquid crystal compositions containing pleochroic anthraquinone dyes, liquid crystal devices containing the compositions, and the dyes
US4491532A (en) * 1980-09-30 1985-01-01 Siemens Aktiengesellschaft Liquid-crystal mixture with a pleochroic anthraquinone dye, and method for producing such a dye
US4356102A (en) * 1980-10-22 1982-10-26 General Electric Company Dichroic liquid crystal compositions containing anthraquinone-based dyes
US4624532A (en) * 1980-10-22 1986-11-25 General Electric Company Dichroic liquid crystal compositions containing anthraquinone-based dyes
WO1982002054A1 (en) * 1980-12-08 1982-06-24 Gen Electric Novel yellow azo dyes and dichroic liquid crystal compositions made therefrom
US4308162A (en) * 1980-12-08 1981-12-29 General Electric Company Novel yellow azo dyes and dichroic liquid crystal compositions made therewith
US4359398A (en) * 1980-12-22 1982-11-16 General Electric Company Liquid crystal compositions with novel tris-azo dichroic dyes
WO1982002209A1 (en) * 1980-12-22 1982-07-08 Gen Electric Liquid crystal compositions with novel tris-azo dichroic dyes
US4483593A (en) * 1981-03-20 1984-11-20 Hitachi, Ltd. Guest-host type liquid crystal composition and liquid crystal display device
JPS5829875A (en) * 1981-07-27 1983-02-22 Nec Corp Liquid crystal composition and liquid crystal color display element
US4477368A (en) * 1981-10-01 1984-10-16 Alps Electric Co., Ltd. Color display liquid crystal composition
JPS5880371A (en) * 1981-11-09 1983-05-14 Nec Corp Liquid crystal composition and liquid crystal color display element
US4550980A (en) * 1981-12-04 1985-11-05 Epson Corporation Liquid crystal composition and display element including same
JPS58109578A (en) * 1981-12-24 1983-06-29 Alps Electric Co Ltd Color liquid crystal display element
JPS58111882A (en) * 1981-12-25 1983-07-04 Alps Electric Co Ltd Color liquid crystal display device
US4478739A (en) * 1982-07-16 1984-10-23 Asulab S.A. Dark colored composition based on liquid crystals
US4530572A (en) * 1982-12-30 1985-07-23 Minnesota Mining And Manufacturing Company Substituted anthraquinone-type isotropic dyes for liquid crystal display devices
US4935160A (en) * 1983-03-02 1990-06-19 Merck Patent Gessellschaft Mit Beschrankter Haftung Liquid-crystal guest-host systems
US10131858B2 (en) 2014-09-30 2018-11-20 Kobe Steel, Ltd. Method for manufacturing ashless coal

Also Published As

Publication number Publication date
JPS6045677B2 (en) 1985-10-11

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