JPS5557820A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS5557820A
JPS5557820A JP13052978A JP13052978A JPS5557820A JP S5557820 A JPS5557820 A JP S5557820A JP 13052978 A JP13052978 A JP 13052978A JP 13052978 A JP13052978 A JP 13052978A JP S5557820 A JPS5557820 A JP S5557820A
Authority
JP
Japan
Prior art keywords
liquid crystal
optically active
crystal display
display device
supply voltage
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
JP13052978A
Other languages
Japanese (ja)
Other versions
JPH0130129B2 (en
Inventor
Hiroshige Tanaka
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 JP13052978A priority Critical patent/JPS5557820A/en
Publication of JPS5557820A publication Critical patent/JPS5557820A/en
Publication of JPH0130129B2 publication Critical patent/JPH0130129B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

PURPOSE: To widen the permissible fluctuation range of supply voltage and improve display characteristics by adding a small amount of optically active material into liquid crystal material and making the rotating direction of its intrinsic pitch and the twist direction of the liquid crystal element opposite.
CONSTITUTION: In the twisted type liquid crystal display device using nematic liquid crystal of positive dielectric anisotropy, a small amount of the optically active substance whose intrinsic pitch rotating direction is opposite with respect to the twist direction of the abovementioned liquid crystal display element is further added to form the liquid crystal layer. Chiral nematic liquid crystals and cholesteric liquid crystals are used for the optically active substance and, e.g., the compound such as the one shown by the formula is added at about 0.25wt%. This widens the permissible fluctuation range of supply voltage and yields the superior display.
COPYRIGHT: (C)1980,JPO&Japio
JP13052978A 1978-10-25 1978-10-25 Liquid crystal display device Granted JPS5557820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13052978A JPS5557820A (en) 1978-10-25 1978-10-25 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13052978A JPS5557820A (en) 1978-10-25 1978-10-25 Liquid crystal display device

Publications (2)

Publication Number Publication Date
JPS5557820A true JPS5557820A (en) 1980-04-30
JPH0130129B2 JPH0130129B2 (en) 1989-06-16

Family

ID=15036471

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13052978A Granted JPS5557820A (en) 1978-10-25 1978-10-25 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS5557820A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5810721A (en) * 1981-07-14 1983-01-21 Dainippon Printing Co Ltd Liquid crystal display element
JPS63293525A (en) * 1987-05-26 1988-11-30 Sanyo Electric Co Ltd Liquid crystal display device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51110350A (en) * 1975-03-24 1976-09-29 Seikosha Kk EKISHOHYOJISOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51110350A (en) * 1975-03-24 1976-09-29 Seikosha Kk EKISHOHYOJISOCHI

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5810721A (en) * 1981-07-14 1983-01-21 Dainippon Printing Co Ltd Liquid crystal display element
JPH0512687B2 (en) * 1981-07-14 1993-02-18 Dainippon Printing Co Ltd
JPS63293525A (en) * 1987-05-26 1988-11-30 Sanyo Electric Co Ltd Liquid crystal display device

Also Published As

Publication number Publication date
JPH0130129B2 (en) 1989-06-16

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