DE69027301D1 - Beleuchtungsvorrichtung mit einer nichtabsorbierenden Abdeckung mit variablem Transmissionsvermögen - Google Patents

Beleuchtungsvorrichtung mit einer nichtabsorbierenden Abdeckung mit variablem Transmissionsvermögen

Info

Publication number
DE69027301D1
DE69027301D1 DE69027301T DE69027301T DE69027301D1 DE 69027301 D1 DE69027301 D1 DE 69027301D1 DE 69027301 T DE69027301 T DE 69027301T DE 69027301 T DE69027301 T DE 69027301T DE 69027301 D1 DE69027301 D1 DE 69027301D1
Authority
DE
Germany
Prior art keywords
lighting device
variable transmittance
absorbing cover
absorbing
cover
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 - Fee Related
Application number
DE69027301T
Other languages
English (en)
Other versions
DE69027301T2 (de
Inventor
Lorne A Whitehead
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Application granted granted Critical
Publication of DE69027301D1 publication Critical patent/DE69027301D1/de
Publication of DE69027301T2 publication Critical patent/DE69027301T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0409—Arrangements for homogeneous illumination of the display surface, e.g. using a layer having a non-uniform transparency
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/14—Arrangements of reflectors therein
DE69027301T 1988-05-05 1990-04-02 Beleuchtungsvorrichtung mit einer nichtabsorbierenden Abdeckung mit variablem Transmissionsvermögen Expired - Fee Related DE69027301T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/190,662 US4937716A (en) 1988-05-05 1988-05-05 Illuminating device having non-absorptive variable transmissivity cover
EP90106293A EP0450115B1 (de) 1988-05-05 1990-04-02 Beleuchtungsvorrichtung mit einer nichtabsorbierenden Abdeckung mit variablem Transmissionsvermögen

Publications (2)

Publication Number Publication Date
DE69027301D1 true DE69027301D1 (de) 1996-07-11
DE69027301T2 DE69027301T2 (de) 1996-10-02

Family

ID=26125070

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69027301T Expired - Fee Related DE69027301T2 (de) 1988-05-05 1990-04-02 Beleuchtungsvorrichtung mit einer nichtabsorbierenden Abdeckung mit variablem Transmissionsvermögen

Country Status (5)

Country Link
US (1) US4937716A (de)
EP (2) EP0450115B1 (de)
CA (1) CA1288406C (de)
DE (1) DE69027301T2 (de)
ES (1) ES2087096T3 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5136479A (en) * 1990-06-19 1992-08-04 E-Systems, Inc. Device and method for creating an areal light source
TW197499B (de) * 1990-07-03 1993-01-01 Meitaku Syst Kk
US5243506A (en) * 1991-06-17 1993-09-07 Tir Systems Ltd. High aspect ratio light emitter having high uniformity and directionality
US5186530A (en) * 1991-11-22 1993-02-16 Tir Systems, Ltd. Lighting structure having variable transmissivity internal light guide illumination
US5339382A (en) * 1993-02-23 1994-08-16 Minnesota Mining And Manufacturing Company Prism light guide luminaire with efficient directional output
ZA9610900B (en) * 1995-12-27 1997-06-27 Kevin D Miekis Supporting structure for a prism light guide
US5661839A (en) 1996-03-22 1997-08-26 The University Of British Columbia Light guide employing multilayer optical film
US5832164A (en) * 1996-05-24 1998-11-03 Miekis; Kevin D. Supporting structure for a prism light guide
US6031958A (en) 1997-05-21 2000-02-29 Mcgaffigan; Thomas H. Optical light pipes with laser light appearance
US5901266A (en) * 1997-09-04 1999-05-04 The University Of British Columbia Uniform light extraction from light guide, independently of light guide length
US5976686A (en) * 1997-10-24 1999-11-02 3M Innovative Properties Company Diffuse reflective articles
US6497946B1 (en) 1997-10-24 2002-12-24 3M Innovative Properties Company Diffuse reflective articles
BR9815834A (pt) 1998-04-30 2000-12-26 Minnesota Mining & Mfg Alojamento para painel iluminado, e, processo para utilizar um filme para painéis
US20040190102A1 (en) * 2000-08-18 2004-09-30 Mullen Patrick W. Differentially-cured materials and process for forming same
KR100798172B1 (ko) 2000-08-18 2008-01-24 리플렉사이트 코포레이션 차별적으로 경화된 물질 및 이를 형성하기 위한 공정
US7230764B2 (en) * 2000-08-18 2007-06-12 Reflexite Corporation Differentially-cured materials and process for forming same
US6871983B2 (en) * 2001-10-25 2005-03-29 Tir Systems Ltd. Solid state continuous sealed clean room light fixture
AU2003208484A1 (en) * 2002-02-21 2003-09-09 Koninklijke Philips Electronics N.V. Luminaire for emitting light having a variable color
DE10207585A1 (de) * 2002-02-22 2004-01-22 Regiolux Gmbh Beleuchtungseinrichtung mit Reflektorelement aus farbigem Papier
DE50202644D1 (de) 2002-10-22 2005-05-04 Marketing Displays Prod Verfahren zum einseitigen Bedrucken eines transparent ausgebildeten Trägermediums
CA2523493A1 (en) * 2003-05-02 2004-11-18 Reflexite Corporation Light-redirecting optical structures
US7121690B1 (en) 2004-02-26 2006-10-17 Advanced Optical Technologies, Llc Constructive occlusion with a transmissive component

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1827963A (en) * 1929-03-05 1931-10-20 John J Wompey Illuminating device
US2053325A (en) * 1932-07-01 1936-09-08 Holophane Co Inc Light mixing apparatus
US2347665A (en) * 1941-03-04 1944-05-02 Christensen Geneva Bandy Internal reflection lighting means
FR1064946A (fr) * 1951-10-24 1954-05-19 Procédé d'illumination de corps transparents ou translucides par conductibilité et réflexion combinée de rayons lumineux
US3236290A (en) * 1963-02-12 1966-02-22 Lueder Holger Method and apparatus for controlling radiation through a window
US3267598A (en) * 1963-06-05 1966-08-23 North American Aviation Inc Internally illuminated matrix
GB1021159A (en) * 1963-11-18 1966-03-02 Lucas Industries Ltd Lamps
US4059916A (en) * 1975-01-30 1977-11-29 Copal Company Limited Light diffusing device
CH600471A5 (de) * 1976-06-24 1978-06-15 Bbc Brown Boveri & Cie
US4161015A (en) * 1976-08-23 1979-07-10 Bausch & Lomb Incorporated Luminaire using a multilayer interference mirror
US4267489A (en) * 1978-12-01 1981-05-12 Ohno Research And Development Laboratories Company Limited Thin schaukasten
JPS5958753A (ja) * 1982-09-28 1984-04-04 株式会社東芝 白熱電球
EP0167721B1 (de) * 1984-07-02 1989-10-11 Mitsubishi Rayon Co., Ltd. Lichtdiffusor
DK152317C (da) * 1984-08-07 1988-07-11 Vinther Plastik Aps Franz Lysplade
GB2196100B (en) * 1986-10-01 1990-07-04 Mitsubishi Rayon Co Light diffusing device
CA1299157C (en) * 1986-12-19 1992-04-21 Akira Tanaka Illuminating apparatus

Also Published As

Publication number Publication date
EP0450115A1 (de) 1991-10-09
DE69027301T2 (de) 1996-10-02
US4937716A (en) 1990-06-26
EP0450115B1 (de) 1996-06-05
ES2087096T3 (es) 1996-07-16
EP0691508A3 (de) 1996-09-11
EP0691508A2 (de) 1996-01-10
CA1288406C (en) 1991-09-03

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee