EP0364228A2 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
EP0364228A2
EP0364228A2 EP89310375A EP89310375A EP0364228A2 EP 0364228 A2 EP0364228 A2 EP 0364228A2 EP 89310375 A EP89310375 A EP 89310375A EP 89310375 A EP89310375 A EP 89310375A EP 0364228 A2 EP0364228 A2 EP 0364228A2
Authority
EP
European Patent Office
Prior art keywords
light
prisms
light fixture
collimation
axis
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Withdrawn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
EP89310375A
Other languages
German (de)
English (en)
Other versions
EP0364228A3 (fr
Inventor
Jeffrey J. C/O Minnesota Mining And Melby
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
Publication of EP0364228A2 publication Critical patent/EP0364228A2/fr
Publication of EP0364228A3 publication Critical patent/EP0364228A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to thin light fixtures.
  • back-lit flat panel displays normally should be kept as thin as possible. When they are thinner they tend to be lighter in weight and more compact, both desirable properties when they are used in applications such as portable computers.
  • Automobile taillights and brake lights also should be kept compact where possible. This is because space used by such lights comes at the expense of luggage space in the vehicle's trunk.
  • a housing defines an optical cavity having an optical window.
  • a source of partially collimated light having an axis of collimation is located inside the optical cavity.
  • a structured surface having a plurality of prisms thereon is positioned within the optical cavity such that the prisms reflect light through the optical window.
  • the peaks of the prisms define a surface at least a portion of which makes an acute angle with the axis of collimation.
  • Figure 1 illustrates a first embodiment of the invention.
  • a housing including walls 10 and 12 defines an optical cavity.
  • the optical cavity has an optical window with a light transmitting member 14, therein.
  • Light transmitting member 14 may be of a transparent or translucent material. If desired, light transmitting member 14 could include structures such as pillow optics or Fresnel prisms.
  • a source of partially collimated light 16 is positioned inside the optical cavity and adjacent side 10 of the housing.
  • Light source 16 may be any source of partially collimated light such as a fluorescent tube or other gas discharge lighting element with an appropriate reflector or an incandescent light with a reflector.
  • light source 16 could include a plurality of light emitting diodes (LEDs).
  • Side 22 of wall 12 is a structured surface having a plurality of, preferably triangular, prisms, 24, thereon.
  • prisms 24 are linear prisms.
  • Prisms 24 are rendered specularly reflective, typically by aluminum vapor coating. It is only necessary that prisms 24 be specularly reflective on the side adjacent light source 16, but it is typically easier to vapor coat both sides. Such prisms reflect light from light source 16 in a predetermined direction. Typically the predetermined direction will be perpendicular to transparent or translucent material 14.
  • Light source 16 emits a beam of substantially collimated light having an axis of collimation 18.
  • Line 20 is drawn parallel to collimation axis 18.
  • the peaks of prisms 24 define a planar surface that makes an acute angle ⁇ with line 20, and thus with collimation axis 18.
  • side 22 of wall 12 cuts through the beam of light emitted by light source 16. Because structured surface 22 so cuts through the beam of light emitted by light source 16, the entire aperture of the optical window is illuminated.
  • the structure of the present invention may be advantageously formed directly on the rear wall of the light fixture.
  • Such a structure could be formed by injection molding.
  • a separate film having the structured surface described above could be placed in the light fixture.
  • Figure 2 shows an alternative embodiment to that of Figure 1.
  • structured surface 22′ is curved.
  • the surface defined by the peaks of prisms 24 is curved rather than planar.
  • that surface is parallel or nearly parallel to the axis of collimation in the region closest to light source 16, but forms a variety of acute angles with it in regions more distant from light source 16. This has the effect of causing prisms more distant from light source 16 to intercept a greater portion of the beam than those closer to light source 16. Because the light beam will naturally expand as it progresses to locations distant from the source, the curvature helps to maintain uniformity of illumination.
  • Figure 3 illustrates an alternative embodiment wherein a housing 30 including walls 32, 34, 36 and 38 defines an optical cavity having an optical window.
  • a transparent or translucent cover 40 lies in the optical window.
  • Light from two partially collimated light sources is directed from light sources 42 and 44 to structured surface 46.
  • the peaks of the prisms of structured surface 46 may define a planar surface lying at an angle to the axis of collimation of the light sources, similar to the embodiment of Figure 1 or may define a curved surface cutting through the beams of light as in the embodiment of Figure 2.
  • Figure 4 illustrates another embodiment of the invention wherein light source 14′ includes a light emitter 50 and a structured surface 52.
  • Structured surface 52 acts in a manner similar to structured surface 22 to take light from a compact source 50 and provide a linear beam.
  • the embodiment of Figure 4 then acts similarly to the embodiment of Figure 1 with surface 52 acting as a light source for structured surface 54.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
EP89310375A 1988-10-11 1989-10-11 Dispositif d'éclairage Withdrawn EP0364228A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25578488A 1988-10-11 1988-10-11
US255784 1988-10-11

Publications (2)

Publication Number Publication Date
EP0364228A2 true EP0364228A2 (fr) 1990-04-18
EP0364228A3 EP0364228A3 (fr) 1990-07-18

Family

ID=22969851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89310375A Withdrawn EP0364228A3 (fr) 1988-10-11 1989-10-11 Dispositif d'éclairage

Country Status (5)

Country Link
EP (1) EP0364228A3 (fr)
JP (1) JPH02176692A (fr)
AU (1) AU633845B2 (fr)
CA (1) CA1321988C (fr)
MX (1) MX173264B (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274158A (en) * 1993-01-07 1994-07-13 Ford Motor Co Low profile illuminator
US5434754A (en) * 1993-12-27 1995-07-18 Ford Motor Company Light manifold
EP0766037A1 (fr) * 1995-09-27 1997-04-02 MAGNETI MARELLI S.p.A. Appareil d'éclairage qui peut-être construit avec une épaisseur réduite, notamment projecteur ou autre lampe extérieure pour véhicule
DE10064703A1 (de) * 2000-12-22 2002-06-27 Thomas Emde Sandwichartiges Plattenelement
US6575584B1 (en) 1999-05-28 2003-06-10 Universite De Liege Light guiding plate with internal micro-prisms
GB2383569A (en) * 2001-12-27 2003-07-02 Yazaki Corp Illumination of a vehicle instrument
WO2007039063A1 (fr) * 2005-09-29 2007-04-12 Osram Opto Semiconductors Gmbh Appareil d'éclairage
WO2008050783A1 (fr) * 2006-10-19 2008-05-02 Panasonic Corporation Dispositif électroluminescent, et unité d'affichage et unité d'éclairage l'utilisant
WO2010022539A1 (fr) * 2008-08-26 2010-03-04 Pan Dingguo Plaque circulaire réfléchissant la lumière, pourvue de prismes triangulaires orientés ayant des sections transversales identiques et lampe à plaque circulaire fabriquée à partir de ladite plaque
WO2011134164A1 (fr) * 2010-04-30 2011-11-03 Pan Dingguo Plaque de guidage de lumière pourvue de microprismes, son procédé de fabrication et lampe en forme de plaque et appareil d'éclairage en forme de plaque fabriqué par celui-ci
DE102012012621A1 (de) * 2012-06-26 2014-01-02 Bartenbach Holding Gmbh Beleuchtungsvorrichtung
DE102012012649A1 (de) * 2012-06-26 2014-01-16 Bartenbach Holding Gmbh Beleuchtungsvorrichtung
WO2014155281A1 (fr) * 2013-03-26 2014-10-02 Koninklijke Philips N.V. Dispositif d'éclairage et luminaire
EP2779146B1 (fr) 2005-10-11 2017-07-26 Philips Lighting Holding B.V. Dispositif d'affichage
WO2018054734A1 (fr) * 2016-09-20 2018-03-29 HELLA GmbH & Co. KGaA Dispositif d'éclairage pour véhicules comprenant un élément holographique et un réflecteur prismatique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001345008A (ja) * 2000-05-31 2001-12-14 Nippon Leiz Co Ltd 面光源装置
JP4865082B1 (ja) * 2010-11-16 2012-02-01 株式会社東芝 液晶表示装置およびバックライトモジュール

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1580461A (fr) * 1968-07-11 1969-09-05
WO1982003676A1 (fr) * 1981-04-20 1982-10-28 Masataka Negishi Dispositif de commande d'images photo
GB2172986A (en) * 1985-02-22 1986-10-01 Sharp Kk Lighting apparatus
WO1988007647A1 (fr) * 1987-03-24 1988-10-06 Minnesota Mining And Manufacturing Company Film reflecteur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1580461A (fr) * 1968-07-11 1969-09-05
WO1982003676A1 (fr) * 1981-04-20 1982-10-28 Masataka Negishi Dispositif de commande d'images photo
GB2172986A (en) * 1985-02-22 1986-10-01 Sharp Kk Lighting apparatus
WO1988007647A1 (fr) * 1987-03-24 1988-10-06 Minnesota Mining And Manufacturing Company Film reflecteur

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274158A (en) * 1993-01-07 1994-07-13 Ford Motor Co Low profile illuminator
US5365412A (en) * 1993-01-07 1994-11-15 Ford Motor Company Low profile illuminator
US5434754A (en) * 1993-12-27 1995-07-18 Ford Motor Company Light manifold
EP0766037A1 (fr) * 1995-09-27 1997-04-02 MAGNETI MARELLI S.p.A. Appareil d'éclairage qui peut-être construit avec une épaisseur réduite, notamment projecteur ou autre lampe extérieure pour véhicule
US6575584B1 (en) 1999-05-28 2003-06-10 Universite De Liege Light guiding plate with internal micro-prisms
DE10064703A1 (de) * 2000-12-22 2002-06-27 Thomas Emde Sandwichartiges Plattenelement
DE10064703B4 (de) * 2000-12-22 2012-04-12 Koninklijke Philips Electronics N.V. Sandwichartiges Plattenelement
GB2383569B (en) * 2001-12-27 2005-04-06 Yazaki Corp Instrument for vehicle
US7152987B2 (en) 2001-12-27 2006-12-26 Yazaki Corporation Instrument for vehicle
GB2383569A (en) * 2001-12-27 2003-07-02 Yazaki Corp Illumination of a vehicle instrument
WO2007039063A1 (fr) * 2005-09-29 2007-04-12 Osram Opto Semiconductors Gmbh Appareil d'éclairage
US7473019B2 (en) 2005-09-29 2009-01-06 Osram Opto Semiconductors Gmbh Lighting apparatus
EP2779146B1 (fr) 2005-10-11 2017-07-26 Philips Lighting Holding B.V. Dispositif d'affichage
WO2008050783A1 (fr) * 2006-10-19 2008-05-02 Panasonic Corporation Dispositif électroluminescent, et unité d'affichage et unité d'éclairage l'utilisant
US8616736B2 (en) 2008-08-26 2013-12-31 Dingguo Pan Circular light-reflecting plate with triangular oriented prisms having identical cross section and circular plate lamp made therefrom
WO2010022539A1 (fr) * 2008-08-26 2010-03-04 Pan Dingguo Plaque circulaire réfléchissant la lumière, pourvue de prismes triangulaires orientés ayant des sections transversales identiques et lampe à plaque circulaire fabriquée à partir de ladite plaque
CN101932875B (zh) * 2008-08-26 2013-01-09 潘定国 等截面三角形定向棱镜圆形反光板及由其制成的圆板灯
KR101292481B1 (ko) 2008-08-26 2013-07-31 딩구오 판 동일한 단면을 구비하는 삼각형에 기초한 프리즘을 구비하는 원형 광 반사판 및 그것을 이용하여 만들어지는 원판형 램프
WO2011134164A1 (fr) * 2010-04-30 2011-11-03 Pan Dingguo Plaque de guidage de lumière pourvue de microprismes, son procédé de fabrication et lampe en forme de plaque et appareil d'éclairage en forme de plaque fabriqué par celui-ci
CN102859272B (zh) * 2010-04-30 2014-01-08 潘定国 微棱镜导光板及其制造方法、及其制成的片灯、片灯具
US8956035B2 (en) 2010-04-30 2015-02-17 Dingguo Pan Light guide plate with micro prisms, manufacture methode thereof and plate shape lamp and plate-shape lamp fixture made thereby
CN102859272A (zh) * 2010-04-30 2013-01-02 潘定国 微棱镜导光板及其制造方法、及其制成的片灯、片灯具
DE102012012621A1 (de) * 2012-06-26 2014-01-02 Bartenbach Holding Gmbh Beleuchtungsvorrichtung
DE102012012649A1 (de) * 2012-06-26 2014-01-16 Bartenbach Holding Gmbh Beleuchtungsvorrichtung
WO2014155281A1 (fr) * 2013-03-26 2014-10-02 Koninklijke Philips N.V. Dispositif d'éclairage et luminaire
WO2018054734A1 (fr) * 2016-09-20 2018-03-29 HELLA GmbH & Co. KGaA Dispositif d'éclairage pour véhicules comprenant un élément holographique et un réflecteur prismatique
CN109716017A (zh) * 2016-09-20 2019-05-03 黑拉有限责任两合公司 用于车辆的具有全息元件和棱镜反射器的发光装置
US10683984B2 (en) 2016-09-20 2020-06-16 HELLA GmbH & Co. KGaA Illuminating device for vehicles
CN109716017B (zh) * 2016-09-20 2022-03-01 黑拉有限责任两合公司 用于车辆的具有全息元件和棱镜反射器的发光装置

Also Published As

Publication number Publication date
AU4158889A (en) 1990-04-26
JPH02176692A (ja) 1990-07-09
MX173264B (es) 1994-02-14
AU633845B2 (en) 1993-02-11
CA1321988C (fr) 1993-09-07
EP0364228A3 (fr) 1990-07-18

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