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JPS5639523A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS5639523A
JPS5639523A JP11511879A JP11511879A JPS5639523A JP S5639523 A JPS5639523 A JP S5639523A JP 11511879 A JP11511879 A JP 11511879A JP 11511879 A JP11511879 A JP 11511879A JP S5639523 A JPS5639523 A JP S5639523A
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal layer
temperature
order
heater
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.)
Pending
Application number
JP11511879A
Other languages
Japanese (ja)
Inventor
Takao Umeda
Takao Miyashita
Yuzuru Shimazaki
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 JP11511879A priority Critical patent/JPS5639523A/en
Publication of JPS5639523A publication Critical patent/JPS5639523A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PURPOSE:To control a liquid crystal layer heating heater in such a manner that the temperature of the liquid crystal layer does not become lower than the operating temperature range by measuring the temperature of the liquid crystal layer through detection of the change in the impedence of refractive index by the temperature of the liquid crystal layer itself. CONSTITUTION:The temperature at which the impedance of the liquid crystal layer changes abruptly changes with the frequencies applied, therefore, if suitable frequencies are selected, the on-off controlling of a heater is accomplished without assembling a bridge circuit. The change in the refractive index on the liquid crystal layer is detected by opposedly disposing a light source 8 and a photodiode D2 by way of a liquid crystal element 1 in-between, whereby the on-off controlling of a heater 6 is performed. It is also possible to use a GTO element in order to make circuit constitution simple, or to provide the one for detection separately from the electrode for displaying and an electric power source in order to facilitate temperature setting or to provide plural detecting parts in order to be adapted in the case when there is a difference in the temperature distribution of liquid crystal elements.
JP11511879A 1979-09-10 1979-09-10 Liquid crystal display device Pending JPS5639523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11511879A JPS5639523A (en) 1979-09-10 1979-09-10 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11511879A JPS5639523A (en) 1979-09-10 1979-09-10 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPS5639523A true JPS5639523A (en) 1981-04-15

Family

ID=14654686

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11511879A Pending JPS5639523A (en) 1979-09-10 1979-09-10 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS5639523A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888599A (en) * 1987-10-23 1989-12-19 Rockwell International Corp. Real time apparatus for adjusting contrast ratio of liquid crystal displays
US5040879A (en) * 1989-03-03 1991-08-20 Greyhawk Systems, Inc. Variable density optical filter
US5157525A (en) * 1989-10-27 1992-10-20 Eev Limited Control of liquid crystal display visual properties to compensate for variation in the characteristics of the liquid crystal
JP2010091940A (en) * 2008-10-10 2010-04-22 Dic Corp Liquid crystal temperature sensor
JP2024534108A (en) * 2021-08-24 2024-09-18 サン－ゴバン グラス フランス Glazing unit with electrically controllable optical properties and with temperature-dependent switching behavior - Patents.com

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888599A (en) * 1987-10-23 1989-12-19 Rockwell International Corp. Real time apparatus for adjusting contrast ratio of liquid crystal displays
US5040879A (en) * 1989-03-03 1991-08-20 Greyhawk Systems, Inc. Variable density optical filter
US5157525A (en) * 1989-10-27 1992-10-20 Eev Limited Control of liquid crystal display visual properties to compensate for variation in the characteristics of the liquid crystal
JP2010091940A (en) * 2008-10-10 2010-04-22 Dic Corp Liquid crystal temperature sensor
JP2024534108A (en) * 2021-08-24 2024-09-18 サン－ゴバン グラス フランス Glazing unit with electrically controllable optical properties and with temperature-dependent switching behavior - Patents.com

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