FR2620795B1 - LIGHT DIFFUSER - Google Patents

LIGHT DIFFUSER

Info

Publication number
FR2620795B1
FR2620795B1 FR8712969A FR8712969A FR2620795B1 FR 2620795 B1 FR2620795 B1 FR 2620795B1 FR 8712969 A FR8712969 A FR 8712969A FR 8712969 A FR8712969 A FR 8712969A FR 2620795 B1 FR2620795 B1 FR 2620795B1
Authority
FR
France
Prior art keywords
light diffuser
diffuser
light
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.)
Expired - Lifetime
Application number
FR8712969A
Other languages
French (fr)
Other versions
FR2620795A1 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR8712969A priority Critical patent/FR2620795B1/en
Priority to CH344288A priority patent/CH676877A5/fr
Priority to PCT/FR1989/000106 priority patent/WO1990010823A1/en
Publication of FR2620795A1 publication Critical patent/FR2620795A1/en
Application granted granted Critical
Publication of FR2620795B1 publication Critical patent/FR2620795B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/006—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G09F2013/1809—Achieving homogeneous illumination using a non-homogeneous front window
    • G09F2013/1813—Achieving homogeneous illumination using a non-homogeneous front window provided with a coating showing a pattern of dots of variable density
FR8712969A 1987-09-18 1987-09-18 LIGHT DIFFUSER Expired - Lifetime FR2620795B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8712969A FR2620795B1 (en) 1987-09-18 1987-09-18 LIGHT DIFFUSER
CH344288A CH676877A5 (en) 1987-09-18 1988-09-15
PCT/FR1989/000106 WO1990010823A1 (en) 1987-09-18 1989-03-15 Light diffuser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8712969A FR2620795B1 (en) 1987-09-18 1987-09-18 LIGHT DIFFUSER

Publications (2)

Publication Number Publication Date
FR2620795A1 FR2620795A1 (en) 1989-03-24
FR2620795B1 true FR2620795B1 (en) 1992-02-28

Family

ID=9355046

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8712969A Expired - Lifetime FR2620795B1 (en) 1987-09-18 1987-09-18 LIGHT DIFFUSER

Country Status (3)

Country Link
CH (1) CH676877A5 (en)
FR (1) FR2620795B1 (en)
WO (1) WO1990010823A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914448A1 (en) * 1989-05-02 1990-11-08 Wustlich Elektr Bauteile ARRANGEMENT FOR ILLUMINATING BACKGROUND AREAS
US5667289A (en) * 1989-05-18 1997-09-16 Seiko Epson Corporation Background lighting apparatus for liquid crystal display
BR9106868A (en) * 1990-09-20 1993-07-06 Ilumination Research Group Pro A DISPLAY SYSTEM
EP0561329B1 (en) * 1992-03-16 1996-06-12 Enplas Corporation Surface light source device
DE69333439T2 (en) * 1992-07-13 2005-02-10 Seiko Epson Corp. Areal illumination device and liquid crystal display
FR2694069B1 (en) * 1992-07-27 1994-11-04 Francois Parmentier Distributed lighting device.
AU4263793A (en) * 1993-04-22 1994-11-08 Francois Parmentier Distributed lighting device
US6612729B1 (en) * 2000-03-16 2003-09-02 3M Innovative Properties Company Illumination device
KR100793536B1 (en) 2006-07-04 2008-01-14 삼성에스디아이 주식회사 Backlight unit of a liquid crystal display device and method for fabricating a light guided panel of the same
ITAN20090089A1 (en) * 2009-11-11 2011-05-12 Adriano Cardinali LUMINOUS PANEL.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223409A (en) * 1939-03-17 1940-12-03 Louis J Dixon Edge lighted sign
GB664193A (en) * 1949-02-26 1952-01-02 Ilford Ltd Photographic dark-room lamp
DE834837C (en) * 1950-11-18 1952-03-24 Preh Elektro Feinmechanik Lighting device with floodlight rod for several single objects that belong together
GB948379A (en) * 1960-04-08 1964-02-05 Gen Electric Improvements in light distribution system
FR1580461A (en) * 1968-07-11 1969-09-05
GB2168519A (en) * 1984-12-12 1986-06-18 Globetech Ltd Display device
JPS6229003A (en) * 1985-07-30 1987-02-07 株式会社トキメック Back reflection type light diffuser
GB2196100B (en) * 1986-10-01 1990-07-04 Mitsubishi Rayon Co Light diffusing device
DK21487D0 (en) * 1987-01-15 1987-01-15 Nils Toft PLATFORM LIGHT

Also Published As

Publication number Publication date
CH676877A5 (en) 1991-03-15
WO1990010823A1 (en) 1990-09-20
FR2620795A1 (en) 1989-03-24

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