FR2328213A1 - Light modulation technique for display device - uses modulator, two polarizers and optical waveguides forming light paths to create display of controlled intensity - Google Patents

Light modulation technique for display device - uses modulator, two polarizers and optical waveguides forming light paths to create display of controlled intensity

Info

Publication number
FR2328213A1
FR2328213A1 FR7307870A FR7307870A FR2328213A1 FR 2328213 A1 FR2328213 A1 FR 2328213A1 FR 7307870 A FR7307870 A FR 7307870A FR 7307870 A FR7307870 A FR 7307870A FR 2328213 A1 FR2328213 A1 FR 2328213A1
Authority
FR
France
Prior art keywords
light
polarizers
optical
optical waveguides
display device
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
FR7307870A
Other languages
French (fr)
Other versions
FR2328213B1 (en
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.)
EQUIP CONST ELECTR
Original Assignee
EQUIP CONST ELECTR
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 EQUIP CONST ELECTR filed Critical EQUIP CONST ELECTR
Priority to FR7307870A priority Critical patent/FR2328213A1/en
Publication of FR2328213A1 publication Critical patent/FR2328213A1/en
Application granted granted Critical
Publication of FR2328213B1 publication Critical patent/FR2328213B1/fr
Granted 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/305—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being the ends of optical fibres

Abstract

A display module is described which contains a light source (7) whose output is transmitted along one or more optical paths (2) towards an observation device (4). The optical path comprises a light modulator (11) which modifies the polarization state of the light by passing it into an optical medium with variable diffusion or rotating power. Polarizers (10,12) are positioned on either side of the light modulator (11), the planes of these two polarizers being s.t. an occultation results for one or more states of the optical medium. The module comprises many such optical paths which are separated on the light input side and recombined on the light output side. The optical paths may be fibres or other optical waveguides. The light inputs may receive coloured light from individual sources or from a common source with many inputs.
FR7307870A 1973-03-06 1973-03-06 Light modulation technique for display device - uses modulator, two polarizers and optical waveguides forming light paths to create display of controlled intensity Granted FR2328213A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7307870A FR2328213A1 (en) 1973-03-06 1973-03-06 Light modulation technique for display device - uses modulator, two polarizers and optical waveguides forming light paths to create display of controlled intensity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7307870A FR2328213A1 (en) 1973-03-06 1973-03-06 Light modulation technique for display device - uses modulator, two polarizers and optical waveguides forming light paths to create display of controlled intensity

Publications (2)

Publication Number Publication Date
FR2328213A1 true FR2328213A1 (en) 1977-05-13
FR2328213B1 FR2328213B1 (en) 1978-04-21

Family

ID=9115824

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7307870A Granted FR2328213A1 (en) 1973-03-06 1973-03-06 Light modulation technique for display device - uses modulator, two polarizers and optical waveguides forming light paths to create display of controlled intensity

Country Status (1)

Country Link
FR (1) FR2328213A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2391522A1 (en) * 1977-05-16 1978-12-15 Bendix Corp Multicoloured liq. crystal display - has several colour light sources to illuminate element for alphanumeric display
FR2412868A1 (en) * 1977-12-26 1979-07-20 Auffret Rene Fibre optic continuously variable attenuator - uses birefringent element with input and output polarisers, with calibrated field
EP0089378A1 (en) * 1981-09-30 1983-09-28 Mitsubishi Denki Kabushiki Kaisha Colored liquid crystal display unit
WO1986007178A1 (en) * 1985-05-24 1986-12-04 Ncr Corporation Optical display device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2146392A1 (en) * 1971-07-22 1973-03-02 Siemens Ag

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2146392A1 (en) * 1971-07-22 1973-03-02 Siemens Ag

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2391522A1 (en) * 1977-05-16 1978-12-15 Bendix Corp Multicoloured liq. crystal display - has several colour light sources to illuminate element for alphanumeric display
FR2412868A1 (en) * 1977-12-26 1979-07-20 Auffret Rene Fibre optic continuously variable attenuator - uses birefringent element with input and output polarisers, with calibrated field
EP0089378A1 (en) * 1981-09-30 1983-09-28 Mitsubishi Denki Kabushiki Kaisha Colored liquid crystal display unit
EP0089378A4 (en) * 1981-09-30 1985-06-10 Mitsubishi Electric Corp Colored liquid crystal display unit.
WO1986007178A1 (en) * 1985-05-24 1986-12-04 Ncr Corporation Optical display device

Also Published As

Publication number Publication date
FR2328213B1 (en) 1978-04-21

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