GB2023301A - Colour polarizing film containing a dichroic dye, especially for use with liquid crystal display devices - Google Patents

Colour polarizing film containing a dichroic dye, especially for use with liquid crystal display devices

Info

Publication number
GB2023301A
GB2023301A GB7917801A GB7917801A GB2023301A GB 2023301 A GB2023301 A GB 2023301A GB 7917801 A GB7917801 A GB 7917801A GB 7917801 A GB7917801 A GB 7917801A GB 2023301 A GB2023301 A GB 2023301A
Authority
GB
United Kingdom
Prior art keywords
dye
wave length
dichroic ratio
polarizing film
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.)
Withdrawn
Application number
GB7917801A
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch 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
Priority claimed from JP6103678A external-priority patent/JPS54153648A/en
Priority claimed from JP9082778A external-priority patent/JPS5518612A/en
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Publication of GB2023301A publication Critical patent/GB2023301A/en
Withdrawn legal-status Critical Current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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133533—Colour selective polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polarising Elements (AREA)

Abstract

This invention relates to a color polarizing film composed of a uniaxially oriented polyvinyl alcohol film which is dyed with a dye having a dichroic ratio. Conventional color polarizing films have a dichroic ratio which is substantially independent of the wave length of incident light. According to this invention a dye is used which causes the dichroic ratio of the visible absorption spectrum of the film to increase in proportion to an increase in wave length of incident light at that region of the wave length which is longer than the maximum absorption wave length, preferably by at least 25 nm. The dyes used in carrying out the invention are azo dyes. A typical dye has the following constitutional formula:- <IMAGE> In Figure 1 is shown a liquid crystal display device incorporating a color polarizing film embodying the invention. In Figure 1 polarizing films 11 and 19 are supported in respective glass substrates 12 and 18. 13 and 17 are transparent electrodes and 14 and 24 are nematic liquid crystals. At least one of the films 11 and 19 is treated with a dye having a dichroic ratio as described above. <IMAGE>
GB7917801A 1978-05-24 1979-05-22 Colour polarizing film containing a dichroic dye, especially for use with liquid crystal display devices Withdrawn GB2023301A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6103678A JPS54153648A (en) 1978-05-24 1978-05-24 Color polarizing film
JP9082778A JPS5518612A (en) 1978-07-25 1978-07-25 Electro-optical display device

Publications (1)

Publication Number Publication Date
GB2023301A true GB2023301A (en) 1979-12-28

Family

ID=26402093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7917801A Withdrawn GB2023301A (en) 1978-05-24 1979-05-22 Colour polarizing film containing a dichroic dye, especially for use with liquid crystal display devices

Country Status (1)

Country Link
GB (1) GB2023301A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232422A1 (en) * 1985-06-19 1987-08-19 Sumitomo Bakelite Company Limited Transparent conductive film integrated with polarizing membrane
EP0688830A1 (en) * 1994-06-22 1995-12-27 MITSUI TOATSU CHEMICALS, Inc. Azo compounds and polarizing films using the compounds
EP0996025A1 (en) * 1997-07-10 2000-04-26 Citizen Watch Co., Ltd. Liquid crystal display
EP1158320A2 (en) * 1994-11-18 2001-11-28 Optiva, Inc. Dichroic light polarizers
CN100380146C (en) * 2003-08-07 2008-04-09 日本化药株式会社 Dye-containing polarizer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0232422A1 (en) * 1985-06-19 1987-08-19 Sumitomo Bakelite Company Limited Transparent conductive film integrated with polarizing membrane
EP0232422A4 (en) * 1985-06-19 1988-06-20 Sumitomo Bakelite Co Transparent conductive film integrated with polarizing membrane.
EP0688830A1 (en) * 1994-06-22 1995-12-27 MITSUI TOATSU CHEMICALS, Inc. Azo compounds and polarizing films using the compounds
US5639809A (en) * 1994-06-22 1997-06-17 Mitsui Toatsu Chemicals, Inc. Azo compounds and polarizing films using the compounds
US5698682A (en) * 1994-06-22 1997-12-16 Mitsui Toatsu Chemicals, Inc. Azo compounds and polarizing films using the compounds
EP1158320A2 (en) * 1994-11-18 2001-11-28 Optiva, Inc. Dichroic light polarizers
EP1158320A3 (en) * 1994-11-18 2003-02-12 Optiva, Inc. Dichroic light polarizers
EP0996025A1 (en) * 1997-07-10 2000-04-26 Citizen Watch Co., Ltd. Liquid crystal display
EP0996025A4 (en) * 1997-07-10 2004-03-10 Citizen Watch Co Ltd Liquid crystal display
CN100380146C (en) * 2003-08-07 2008-04-09 日本化药株式会社 Dye-containing polarizer

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)