EP1099079A1 - Dispositif d'eclairage - Google Patents

Dispositif d'eclairage

Info

Publication number
EP1099079A1
EP1099079A1 EP00943592A EP00943592A EP1099079A1 EP 1099079 A1 EP1099079 A1 EP 1099079A1 EP 00943592 A EP00943592 A EP 00943592A EP 00943592 A EP00943592 A EP 00943592A EP 1099079 A1 EP1099079 A1 EP 1099079A1
Authority
EP
European Patent Office
Prior art keywords
lamp
aperture
light
lighting device
longitudinal 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Withdrawn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
EP00943592A
Other languages
German (de)
English (en)
Inventor
Frank Vollkommer
Lothar Hitzschke
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1099079A1 publication Critical patent/EP1099079A1/fr
Withdrawn legal-status Critical Current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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/04—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the light source
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • 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
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/025—Associated optical elements

Definitions

  • the invention relates to a lighting device with an electric lamp with an aperture and an optical system according to the preamble of claim 1.
  • the invention also relates to a method for directing light rays from an aperture lamp according to the preamble of the method claim.
  • the lamp used for the lighting device has a tubular lamp vessel which is closed on both sides.
  • the inside or outside of the lamp vessel is provided with a reflector for visible light, where a defined area is left out along the longitudinal axis. In this way, an aperture is created through which the light passes the lamp reaches the outside (aperture lamp) .
  • the reflector can also be formed by a suitably thick phosphor layer. These lamps are also known as aperture fluorescent lamps.
  • lighting devices of the type mentioned are suitable, inter alia, for effect lighting and workplace lighting.
  • LCD Liquid Crystal Display
  • Liquid crystal displays are used in a variety of ways, for example in control rooms, cockpits of aircraft and increasingly also in motor vehicles, in entertainment and communication electronics and as screens for personal computers (PC).
  • the lamp, the optical system and the light guide plate are matched to one another in such a way that the light of the lamp can be coupled into the light guide plate through at least one narrow side (“edge”).
  • Light technology "). By means of reflection on a diffuse reflection layer applied to the underside of the light guide plate, for example, this light passes out over the entire front side of the light guide plate and thus acts as a flat light source which is expanded in accordance with the dimensions of the light guide plate.
  • the lamp vessel can be rod-shaped, but also angled, for example L-shaped or U-shaped. In the latter case, the light from the lamp is coupled into the light guide plate via two or three of the edges thereof.
  • two or more lamps - each including an optical system - can also be used to couple light into a light guide plate.
  • the lighting device under consideration is a device with a tubular aperture lamp.
  • the cross section of the lamp is curved, in particular circular, or also elliptical, drop-shaped, etc.
  • Each sufficiently small surface element of the aperture surface of this lamp emits light in a good approximation with a relatively wide angular distribution, in particular a Lambertian or at least Lambertian distribution.
  • this angular distribution must be suitably shaped, in particular narrowed, in order to to achieve luminosity and / or to improve the effective overall efficiency of the lighting device. Because of the tubular geometry of the aperture lamp, essentially only the angular distribution in a sectional plane perpendicular to the lamp longitudinal axis is decisive.
  • the angular distribution of the radiation in the direction of the lamp longitudinal axis is at most of secondary importance.
  • the actually cylindrical problem of light beam distribution or guidance can therefore be reduced approximately to considerations in a sectional plane perpendicular to the lamp axis.
  • Another aspect of the invention relates to the coupling of the lamp light leaving the aperture into a light guide plate.
  • the aperture surface is curved because it is part of the tubular lamp surface.
  • Protection is also claimed for a method for influencing the light of a tubular aperture lamp according to the method claim.
  • the basic idea of the invention is to provide two optical means connected in series, the first means being curved, viewed in a sectional plane perpendicular to the longitudinal axis of the lamp.
  • This first means bundles the wide light beam distribution emitted by each surface element in the area of the aperture in the direction of the normal of the respective surface element.
  • the second means tilts at least a part of the light beams coming from the first means by a tilt angle, the tilt angles of at least some of the light beams being of different sizes.
  • the light emitted by the curved aperture surface can be directed in a targeted manner, for example “parallelized” or converging light beams can be generated.
  • the tilt angle is defined here as the angle between the original main emission direction and the tilted main emission direction of the respective light beam.
  • the curvature of the first optical means is preferably adapted to the curvature of the lamp in the area of the aperture. It is thereby achieved that a large part of the light leaving the aperture with a broad light beam distribution is coupled into the first means, leaving it in the form of numerous relatively narrow light beams which are at least partially tilted by the second means.
  • the first is to minimize coupling losses Means also preferably arranged substantially directly on the outer surface of the aperture.
  • FIG. 1 shows schematically a cross section through a tubular lamp 1 with a circular cross section.
  • FIG. 1 shows schematically a cross section through a tubular lamp 1 with a circular cross section.
  • Shown are a first and second edge 2, 3 of an aperture, the central beam 4 of the aperture and in each case the vectors of the main emission direction of an edge light bundle without 5 or with 6 the optical system according to the invention (not shown).
  • FIG. 1 shows schematically a cross section through a tubular lamp 1 with a circular cross section.
  • the advantageous effect of the invention is particularly effective when the diameter of the tubular vessel of the lamp is relatively large, in particular the same size as or greater than the thickness of the light guide plate. Then, without any special measures, a relatively large proportion of the light emitted by the lamp aperture passes the coupling surface of the light guide plate.
  • the advantageous effect of the invention is not limited to such constellations.
  • the second means can also be integrated directly into the light guide.
  • the width d of the aperture is also chosen to be as large as possible.
  • the width b of the aperture preferably corresponds approximately to the thickness d of the light guide plate.
  • FIG. 1 shows a schematic illustration to explain the basic idea of the invention
  • FIG. 2 shows a cross section through a tubular lamp with an optical system in a highly schematic representation
  • FIG. 3 shows an enlargement A of the optical system from FIG. 2 in the central region of the aperture
  • FIG. 4 shows an enlargement B of the optical system from FIG. 2 in the edge region of the aperture
  • Figure 5 shows a partial cross section of a complete lighting device with a tubular aperture fluorescent lamp with an optical system and light guide plate.
  • FIG. 2 shows a highly schematic illustration of a cross section through a tubular aperture fluorescent lamp 1 according to the invention (details have been omitted here for the sake of clarity) with an optical system consisting of the two optical means 8, 9.
  • the two optical means are transparent plastic films 8, 9 which are arranged one after the other on the surface of the vessel wall 10 of the lamp 1 in the area of the aperture. are not. Starting from the center point M of the lamp (viewed in the cross section in FIG. 2), the aperture spans an angle ⁇ .
  • the first film 8 has a microprism structure on its side facing away from the vessel wall 10 of the lamp aperture.
  • the structure is designed as a multiplicity of prisms 11 in the form of isosceles triangles, the prisms 11 running parallel to the longitudinal axis of the lamp 1.
  • the prism structure of the first film 8 transmits only those light rays that strike the side of the film 8 facing the lamp aperture within an acceptance angle.
  • the value of the acceptance angle can be influenced, among other things, by the respective prism angle of each prism.
  • the remaining rays are reflected back by means of total reflection on the respective prisms in the direction of the lamp aperture or vessel wall 10 and redistributed by means of scattering or reflection until they strike the first film 8 within the acceptance angle and are finally also transmitted.
  • the aperture is completely spared from phosphor, it can be helpful to support the redistribution to arrange an additional diffuser between the vessel wall 10 of the lamp 1 and the first film 8. This minimizes the interface losses.
  • the diffuser can also be realized by matting the surface of the vessel wall 10 in the area of the aperture. However, these measures can also be useful if the aperture surface of the lamp is provided with phosphor.
  • the second film 9 likewise has a prism structure on its side facing the first film 8.
  • the structure is designed as a multiplicity of prisms 12 in the form of isosceles triangles, the prisms 12 likewise running parallel to the longitudinal axis of the tubular lamp 1.
  • the light beams coming from the first film 8 are tilted away from their respective main emission direction and towards the central beam 4.
  • FIG. 5 shows a schematic sectional illustration of a flat lighting device for the backlighting of liquid crystal displays (not shown), consisting of an aperture fluorescent lamp 19, an optical system 110, corresponding to the illustrations in FIGS. 3 and 4, and a light guide plate 111.
  • the phosphor layer 116 is on the reflection layer 115 or applied directly to the inner wall of the discharge vessel 112 in the region of the aperture 117.
  • the outer diameter of the discharge vessel 112 made of glass is approximately 14 mm with a wall thickness of approximately 0.5 mm.
  • the length of the tubular discharge vessel 112, closed at both ends with a dome (not shown) formed from the vessel material, is approximately 27 cm.
  • Xenon is located within the discharge vessel 112 with a filling pressure of approximately 17 kPa.
  • the two electrodes 113, 114 are formed as metal strips which are arranged on the inner wall of the discharge vessel 112 parallel to the longitudinal axis of the tube and diametrically to one another.
  • both electrodes 113, 114 are covered with a dielectric layer 100 made of glass solder.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention concerne un dispositif d'éclairage comprenant une lampe à fenêtre (1) présentant deux moyens optiques connectés en série (8, 9), dont au moins le premier moyen (8) est incurvé, lorsqu'il est vu dans un plan de section transversale perpendiculaire à l'axe longitudinal de la lampe. Le premier moyen (8) focalise la large distribution du faisceau lumineux émis par chaque élément de surface dans la région de la fenêtre, en direction de la normale à chaque élément de surface. Le deuxième moyen (9) fait pivoter d'un certain angle d'inclinaison au moins une partie du faisceau lumineux provenant du premier moyen, les angles d'inclinaison étant d'une grandeur pouvant varier d'au moins une fraction dudit faisceau lumineux. De cette façon, la lumière émise par la surface incurvée de la fenêtre peut être dirigée de manière ciblée, par exemple, de façon parallèle.
EP00943592A 1999-05-20 2000-05-13 Dispositif d'eclairage Withdrawn EP1099079A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19923264 1999-05-20
DE19923264A DE19923264A1 (de) 1999-05-20 1999-05-20 Beleuchtungsvorrichtung
PCT/DE2000/001523 WO2000071928A1 (fr) 1999-05-20 2000-05-13 Dispositif d'eclairage

Publications (1)

Publication Number Publication Date
EP1099079A1 true EP1099079A1 (fr) 2001-05-16

Family

ID=7908701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00943592A Withdrawn EP1099079A1 (fr) 1999-05-20 2000-05-13 Dispositif d'eclairage

Country Status (9)

Country Link
US (1) US6402343B1 (fr)
EP (1) EP1099079A1 (fr)
JP (1) JP2003500814A (fr)
KR (1) KR100730426B1 (fr)
CN (1) CN1125941C (fr)
CA (1) CA2334234A1 (fr)
DE (1) DE19923264A1 (fr)
TW (1) TW473764B (fr)
WO (1) WO2000071928A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4322409B2 (ja) 2000-07-14 2009-09-02 Ｎｅｃ液晶テクノロジー株式会社 アパーチャ型蛍光ランプの製造方法、面照明装置の製造方法、液晶表示装置、及び電子機器
KR100936364B1 (ko) * 2003-06-18 2010-01-12 엘지디스플레이 주식회사 액정표시모듈
JP2005011634A (ja) * 2003-06-18 2005-01-13 Nec Mitsubishi Denki Visual Systems Kk バックライトシステム
KR20060001423A (ko) * 2004-06-30 2006-01-06 엘지.필립스 엘시디 주식회사 액정표시장치의 백라이트 유닛
WO2006051475A1 (fr) * 2004-11-15 2006-05-18 Koninklijke Philips Electronics N.V. Source de lumiere fluorescente et dispositif d'affichage comprenant une telle source
KR101079574B1 (ko) * 2007-01-15 2011-11-03 삼성전자주식회사 조명광원 및 이를 채용한 스캐너 모듈 및 이미지스캐닝장치
GB2453323A (en) * 2007-10-01 2009-04-08 Sharp Kk Flexible backlight arrangement and display
CN101498420B (zh) * 2008-01-30 2011-01-19 海洋王照明科技股份有限公司 一种透明件及使用该透明件的灯具
DE102008053876A1 (de) * 2008-10-30 2010-05-06 Khs Ag Flaschennaht- und Embossingausrichtung
EP3052856A1 (fr) * 2013-10-03 2016-08-10 3M Innovative Properties Company Système d'éclairage à distance

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457447A (en) * 1966-07-01 1969-07-22 Sylvania Electric Prod Apertured fluorescent lamp with lens along the aperture
US3442582A (en) * 1966-12-07 1969-05-06 Ibm Lamp arrangement for document scanning and modified lamp
JPS52100775A (en) * 1976-02-20 1977-08-24 Matsushita Electronics Corp Fluorescent lamp
US4351019A (en) * 1981-06-29 1982-09-21 Xerox Corporation Facetted reflector
DE3316771A1 (de) * 1983-05-07 1984-11-08 Leybold-Heraeus GmbH, 5000 Köln Lichtquelle fuer nichtdispersive gasanalysengeraete als fluoreszenzlampe
JPH0129928Y2 (fr) 1984-09-29 1989-09-12
JPH07104562B2 (ja) * 1989-06-02 1995-11-13 富士ゼロックス株式会社 カラー画像記録装置の照明用光源
US5291379A (en) * 1993-04-01 1994-03-01 Jem Dong Lu Protective lamp-shade
US5645337A (en) * 1995-11-13 1997-07-08 Interstate Electronics Corporation Apertured fluorescent illumination device for backlighting an image plane
US5854872A (en) 1996-10-08 1998-12-29 Clio Technologies, Inc. Divergent angle rotator system and method for collimating light beams

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0071928A1 *

Also Published As

Publication number Publication date
KR20010053383A (ko) 2001-06-25
CA2334234A1 (fr) 2000-11-30
JP2003500814A (ja) 2003-01-07
TW473764B (en) 2002-01-21
DE19923264A1 (de) 2001-01-18
US6402343B1 (en) 2002-06-11
WO2000071928A1 (fr) 2000-11-30
CN1125941C (zh) 2003-10-29
KR100730426B1 (ko) 2007-06-19
CN1304484A (zh) 2001-07-18

Similar Documents

Publication Publication Date Title
EP0912991B1 (fr) Tube fluorescent plat destine a l'eclairage de fond et dispositif d'affichage a cristaux liquides dote de ce tube fluorescent plat
DE69713980T2 (de) Leuchtstofflampe mit äusserer elektrode und beleuchtungseinheit
EP1378771A1 (fr) Eclairage intérieur
WO2011131446A1 (fr) Guide de lumière plan et projecteur plat
EP1051582A1 (fr) Systeme d'eclairage
DE69014098T2 (de) Strahlungsaussendende paneele und anzeigeanordnungen.
EP1099079A1 (fr) Dispositif d'eclairage
EP1247043B1 (fr) Dispositif d'éclairage plat
WO1998043278A2 (fr) Spot plat
EP1417699B1 (fr) Lampe a decharge a amorcage facilite
EP1115998B1 (fr) Source lumineuse allongee
DE102007050271A1 (de) Lichtleitereinrichtung sowie Beleuchtungsvorrichtung mit einer solchen Lichtleitereinrichtung
EP0990262B1 (fr) Lampe a decharge a electrodes protegees par un dielectrique
WO2013127557A1 (fr) Lampe
DE10211015A1 (de) Reflektorlampe
EP0496921B1 (fr) Lampe
EP1034397A1 (fr) Dispositif d'eclairage plat
EP1496308A2 (fr) Lampe d'éclairage intérieur avec un élément réfractif
WO2000038482A1 (fr) Dispositif d'eclairage plat et procede pour le faire fonctionner
DE19844921A1 (de) Flache Beleuchtungsvorrichtung
EP0976144A1 (fr) Lampe de signalisation plate a decharge entravee dielectriquement
EP1843082B1 (fr) Plafonnier, en particulier pour utilisation dans un couloir
DE19826548A1 (de) Beleuchtungsanordnung
DE102006037859A1 (de) Fluoreszenzlampe vom EEFL-Typ mit optimiertem Wirkungsgrad
EP3767159A1 (fr) Éclairage de secours

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 20010406

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: F21V 5/02 20060101AFI20060926BHEP

Ipc: F21Y 103/00 20060101ALI20060926BHEP

Ipc: F21V 8/00 20060101ALI20060926BHEP

Ipc: F21V 13/04 20060101ALI20060926BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070301