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JPS5776522A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
JPS5776522A
JPS5776522A JP55151467A JP15146780A JPS5776522A JP S5776522 A JPS5776522 A JP S5776522A JP 55151467 A JP55151467 A JP 55151467A JP 15146780 A JP15146780 A JP 15146780A JP S5776522 A JPS5776522 A JP S5776522A
Authority
JP
Japan
Prior art keywords
liquid crystal
display
cells
display device
crystal display
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
JP55151467A
Other languages
Japanese (ja)
Inventor
Yoshio Ono
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.)
Casio Computer Co Ltd
Original Assignee
Casio Computer 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 Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP55151467A priority Critical patent/JPS5776522A/en
Publication of JPS5776522A publication Critical patent/JPS5776522A/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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133631—Birefringent elements, e.g. for optical compensation with a spatial distribution of the retardation value

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

Abstract

PURPOSE:To avoid the white-dropout (nondisplay) phenomenon which is caused when a simultaneous lighting is given to an overlap part of the upper and lower display layers for a liquid crystal display device consisting of the upper and lower twist nematic liquid crystal display layers, by setting a selective polarizing layer between the upper and lower display layers. CONSTITUTION:A double-layer liquid crystal display device consists of an upper liquid crystal cell 2 made of an electrode substrate 7 holding a liquid crystal material 8 between and a lower liquid crystal cell 3 comprising electrode substrate 12 holding a liquid crystal material 13. Then a selective polarizing layer 4 is set between the cells 2 and 3. In other words, the layer 4 contains a polarizing region 18 at the areas corresponding to analog display parts 10 and 15 plus a nonpolarizing region 19 at the areas corresponding to digital display parts 11 and 16 respectively at the display parts of the cells 2 and 3. Thus the digital display part is displayed bright; while the analog display part is rather dark. However, no white-dropout phenomenon is caused to ensure a high-contrast display with the cells 2 and 3.
JP55151467A 1980-10-30 1980-10-30 Liquid crystal display device Pending JPS5776522A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55151467A JPS5776522A (en) 1980-10-30 1980-10-30 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55151467A JPS5776522A (en) 1980-10-30 1980-10-30 Liquid crystal display device

Publications (1)

Publication Number Publication Date
JPS5776522A true JPS5776522A (en) 1982-05-13

Family

ID=15519160

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55151467A Pending JPS5776522A (en) 1980-10-30 1980-10-30 Liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS5776522A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04209017A (en) * 1990-12-03 1992-07-30 Kubota Corp Self-actuated pressure reducing valve
US5272553A (en) * 1988-10-28 1993-12-21 Sharp Kabushiki Kaisha Projection type liquid crystal display device with twisted nematic liquid crystal layers
US5537236A (en) * 1993-05-18 1996-07-16 Meggitt (Uk) Limited Display system having two liquid crystal layers for displaying fixed and variable indicia

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5272553A (en) * 1988-10-28 1993-12-21 Sharp Kabushiki Kaisha Projection type liquid crystal display device with twisted nematic liquid crystal layers
JPH04209017A (en) * 1990-12-03 1992-07-30 Kubota Corp Self-actuated pressure reducing valve
US5537236A (en) * 1993-05-18 1996-07-16 Meggitt (Uk) Limited Display system having two liquid crystal layers for displaying fixed and variable indicia

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