JPS5638376A - Electrooptic element - Google Patents

Electrooptic element

Info

Publication number
JPS5638376A
JPS5638376A JP11429479A JP11429479A JPS5638376A JP S5638376 A JPS5638376 A JP S5638376A JP 11429479 A JP11429479 A JP 11429479A JP 11429479 A JP11429479 A JP 11429479A JP S5638376 A JPS5638376 A JP S5638376A
Authority
JP
Japan
Prior art keywords
formula
electrooptic element
guest
dialkylamino
alkoxy
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
JP11429479A
Other languages
Japanese (ja)
Other versions
JPS6146032B2 (en
Inventor
Shuji Imazeki
Akio Kobi
Yasusada Morishita
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11429479A priority Critical patent/JPS5638376A/en
Publication of JPS5638376A publication Critical patent/JPS5638376A/en
Publication of JPS6146032B2 publication Critical patent/JPS6146032B2/ja
Granted legal-status Critical Current

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  • Liquid Crystal (AREA)

Abstract

PURPOSE: An electrooptic element that is prepared by adding a specifically structured anthraquinone pigment to a guest-host type liquid crystal composition, thus showing good order parameter (dichromic ratio) and large absorptivity coefficient and permitting good colored display.
CONSTITUTION: The objective electrooptic element is prepared by adding (A) at least one of anthraquinone pigments of formula I [R2 is H, alkyl, alkoxy, dialkylamino, halogen, hydroxyl] or (B) formula II [R1 is H, alkyl, alkoxy, dialkylamino, halogen], preferably a compound of formula III to a guest-host type liquid crystals, e.g., by 0.5wt%. The pigment of formula I is obtained, e.g., by heating quinizarin, leucoquinizarin and a biphenylamine derivative in a solvent such as an alcohol in the presence of a dehydrating agent and purifying the crude product.
COPYRIGHT: (C)1981,JPO&Japio
JP11429479A 1979-09-07 1979-09-07 Electrooptic element Granted JPS5638376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11429479A JPS5638376A (en) 1979-09-07 1979-09-07 Electrooptic element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11429479A JPS5638376A (en) 1979-09-07 1979-09-07 Electrooptic element

Publications (2)

Publication Number Publication Date
JPS5638376A true JPS5638376A (en) 1981-04-13
JPS6146032B2 JPS6146032B2 (en) 1986-10-11

Family

ID=14634250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11429479A Granted JPS5638376A (en) 1979-09-07 1979-09-07 Electrooptic element

Country Status (1)

Country Link
JP (1) JPS5638376A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57164182A (en) * 1981-04-01 1982-10-08 Nec Corp Dyestuff/liquid crystal mixture used for colored liquid crystal display element
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
US4472292A (en) * 1981-07-02 1984-09-18 Merck Patent Gesellschaft Mit Beschrankter Haftung Liquid crystalline dielectric, new dichroitic naphthoquinone dyestuffs and electro-optical indicator element
JPS6381021A (en) * 1986-09-25 1988-04-11 Tsutsunaka Plast Kogyo Kk Manufacture of thermoplastic synthetic resin laminated molded product
JPS63303719A (en) * 1987-06-04 1988-12-12 Tsutsunaka Plast Kogyo Kk Hot molding method of laminated molded product of thermoplastic resin

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220141204A (en) 2021-04-12 2022-10-19 한국조폐공사 Manufacturing method for ID card

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPS57164182A (en) * 1981-04-01 1982-10-08 Nec Corp Dyestuff/liquid crystal mixture used for colored liquid crystal display element
US4472292A (en) * 1981-07-02 1984-09-18 Merck Patent Gesellschaft Mit Beschrankter Haftung Liquid crystalline dielectric, new dichroitic naphthoquinone dyestuffs and electro-optical indicator element
JPS6381021A (en) * 1986-09-25 1988-04-11 Tsutsunaka Plast Kogyo Kk Manufacture of thermoplastic synthetic resin laminated molded product
JPS63303719A (en) * 1987-06-04 1988-12-12 Tsutsunaka Plast Kogyo Kk Hot molding method of laminated molded product of thermoplastic resin

Also Published As

Publication number Publication date
JPS6146032B2 (en) 1986-10-11

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