FR2178444A5 - - Google Patents

Info

Publication number
FR2178444A5
FR2178444A5 FR7211578A FR7211578A FR2178444A5 FR 2178444 A5 FR2178444 A5 FR 2178444A5 FR 7211578 A FR7211578 A FR 7211578A FR 7211578 A FR7211578 A FR 7211578A FR 2178444 A5 FR2178444 A5 FR 2178444A5
Authority
FR
France
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.)
Expired
Application number
FR7211578A
Other languages
French (fr)
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.)
ECA SA
Original Assignee
ECA SA
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 ECA SA filed Critical ECA SA
Priority to FR7211578A priority Critical patent/FR2178444A5/fr
Priority to BE128114A priority patent/BE795975A/en
Priority to GB1055273A priority patent/GB1394541A/en
Priority to DE2311330A priority patent/DE2311330C3/en
Priority to US00346567A priority patent/US3838917A/en
Priority to NLAANVRAGE7304443,A priority patent/NL177948C/en
Application granted granted Critical
Publication of FR2178444A5 publication Critical patent/FR2178444A5/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/02—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes by tracing or scanning a light beam on a screen
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G09F2013/1804—Achieving homogeneous illumination
    • G09F2013/1831—Achieving homogeneous illumination using more than one light source
FR7211578A 1972-03-31 1972-03-31 Expired FR2178444A5 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7211578A FR2178444A5 (en) 1972-03-31 1972-03-31
BE128114A BE795975A (en) 1972-03-31 1973-02-26 DISPLAY DEVICE OF A DOT ON A TRANSPARENT OR TRANSLUCENT SCREEN
GB1055273A GB1394541A (en) 1972-03-31 1973-03-05 System for displaying a point on a transparent or translucent screen
DE2311330A DE2311330C3 (en) 1972-03-31 1973-03-07 Device for displaying a point
US00346567A US3838917A (en) 1972-03-31 1973-03-30 System for displaying a point on a transparent or translucent screen
NLAANVRAGE7304443,A NL177948C (en) 1972-03-31 1973-03-30 DEVICE FOR DISPLAYING A POINT ON A SCREEN.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7211578A FR2178444A5 (en) 1972-03-31 1972-03-31

Publications (1)

Publication Number Publication Date
FR2178444A5 true FR2178444A5 (en) 1973-11-09

Family

ID=9096209

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7211578A Expired FR2178444A5 (en) 1972-03-31 1972-03-31

Country Status (6)

Country Link
US (1) US3838917A (en)
BE (1) BE795975A (en)
DE (1) DE2311330C3 (en)
FR (1) FR2178444A5 (en)
GB (1) GB1394541A (en)
NL (1) NL177948C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0931976A1 (en) * 1998-01-21 1999-07-28 MAN Systemelektronik GmbH Uniform illumination device for flat informations display

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812090C2 (en) 1998-03-19 2000-03-09 Daimler Chrysler Ag Multi-cylinder piston internal combustion engine with at least two cylinder banks
FR2856159B1 (en) * 2003-06-16 2005-09-09 Laurent Lipiner SYSTEM AND METHOD FOR VISUALIZING IMAGE CONTENT ON TRANSPARENT SURFACE, AND ADAPTED SURFACE COATINGS.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1302353A (en) * 1917-09-20 1919-04-29 Conrad Friedrich Luminous hair-line.
US2584777A (en) * 1949-04-18 1952-02-05 George S Adolfson Clearance indicating arm
US2898880A (en) * 1956-10-04 1959-08-11 Jr Perry B Newton Single panel illuminated instrument dial

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0931976A1 (en) * 1998-01-21 1999-07-28 MAN Systemelektronik GmbH Uniform illumination device for flat informations display

Also Published As

Publication number Publication date
DE2311330A1 (en) 1973-10-04
NL7304443A (en) 1973-10-02
NL177948B (en) 1985-07-16
DE2311330B2 (en) 1975-05-07
GB1394541A (en) 1975-05-21
US3838917A (en) 1974-10-01
DE2311330C3 (en) 1975-12-11
NL177948C (en) 1985-12-16
BE795975A (en) 1973-06-18

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Legal Events

Date Code Title Description
ST Notification of lapse