DE10256179A1 - lighting arrangement - Google Patents
lighting arrangement Download PDFInfo
- Publication number
- DE10256179A1 DE10256179A1 DE2002156179 DE10256179A DE10256179A1 DE 10256179 A1 DE10256179 A1 DE 10256179A1 DE 2002156179 DE2002156179 DE 2002156179 DE 10256179 A DE10256179 A DE 10256179A DE 10256179 A1 DE10256179 A1 DE 10256179A1
- Authority
- DE
- Germany
- Prior art keywords
- light
- light guide
- coupling
- lighting arrangement
- display
- 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.)
- Ceased
Links
- 230000008878 coupling Effects 0.000 claims abstract description 17
- 238000010168 coupling process Methods 0.000 claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 claims abstract description 17
- 238000005286 illumination Methods 0.000 claims description 5
- 239000013307 optical fiber Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000003716 rejuvenation Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
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
- G02B6/0018—Redirecting means on the surface of the light guide
-
- 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
- G02B6/0045—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 by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02B6/0021—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 for housing at least a part of the light source, e.g. by forming holes or recesses
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Planar Illumination Modules (AREA)
Abstract
Die Erfindung betrifft eine Beleuchtungsanordnung für ein Display (2) mit wenigstens einem Licht emittierenden Element (3). Ein Lichtleiter (4) ist hinter dem Display (2) angeordnet und weist eine Ein- und Auskoppelfläche auf, die zueinander parallel angeordnet sind, wobei die Auskoppelfläche ein Vielfaches der Einkoppelfläche beträgt und der Lichtleiter (4) das Licht zwischen Ein- und Auskoppelfläche umlenkt.The invention relates to a lighting arrangement for a display (2) with at least one light-emitting element (3). A light guide (4) is arranged behind the display (2) and has a coupling and decoupling surface which are arranged parallel to one another, the coupling out surface being a multiple of the coupling surface and the light guide (4) deflecting the light between the coupling and decoupling surface ,
Description
Die Erfindung betrifft eine Beleuchtungsanordnung für ein Display mit wenigstens einem Licht emittierenden Element.The invention relates to a lighting arrangement for a Display with at least one light-emitting element.
Derartige Beleuchtungsanordnungen, bei denen als Licht emittierendes Element in der Regel Leuchtdioden (LED) eingesetzt werden, sind beispielsweise als Hintergrundbeleuchtung für Flüssigkeitskristall-Anzeigen (LCD) bekannt. Üblicherweise werden hierzu die LEDs über die gesamte auszuleuchtende Fläche verteilt, um eine möglichst gleichmäßige Leuchtstärke und homogene Leuchtdichteverteilung zu gewährleisten.Such lighting arrangements, in which light-emitting diodes are generally used as the light-emitting element (LED) are used, for example, as backlighting for liquid crystal displays (LCD) known. Usually will the LEDs above the entire area to be illuminated distributed to one if possible uniform luminosity and to ensure homogeneous luminance distribution.
Bei der in
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Beleuchtungsanordnung vorzuschlagen, die einen einfacheren und kostengünstigeren Aufbau besitzt.The present invention lies based on the task of proposing a lighting arrangement, which has a simpler and less expensive structure.
Die Aufgabe wird durch eine Beleuchtungsanordnung mit den Merkmalen des Anspruchs 1 gelöst. Weitere Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.The task is done by a lighting arrangement solved with the features of claim 1. Other configurations the invention emerge from the subclaims.
Erfindungsgemäß ist bei der Beleuchtungsanordnung ein Lichtleiter vorgesehen, der eine Ein- und Auskoppelfläche aufweist, wobei die Auskoppelfläche ein Vielfaches der Einkoppelfläche beträgt und der Lichtleiter das Licht zwischen der Ein- und Auskoppelfkäche umlenkt.According to the invention in the lighting arrangement a light guide is provided which has a coupling and decoupling surface, where the decoupling surface a multiple of the coupling area is and the light guide deflects the light between the coupling and decoupling surfaces.
In vorteilhafter Weise ist hierbei die Leiterplatte, auf der die Licht emittierenden Elemente angeordnet sind, parallel zum Display angeordnet. Der Lichtleiter übernimmt dabei die Funktion der Lichtführung, wobei das Licht über die dem Display zugewandte Auskoppelfläche abgegeben wird. Die Ein- und Auskoppelfläche sind vorzugsweise parallel zueinander angeordnet.This is advantageous the circuit board on which the light emitting elements are arranged are arranged parallel to the display. The light guide takes over the function of the light guidance, being the light over the decoupling surface facing the display is released. The inputs and outcoupling are preferably arranged parallel to one another.
Die Auskoppelfläche des Lichtleiters ist an der Oberfläche aufgerauht, um eine homogene Ausleuchtung der Beleuchtungsfläche zu erzielen.The coupling surface of the light guide is on the surface roughened to achieve homogeneous illumination of the lighting surface.
Die das Licht emittierenden Elemente sind in vorteilhafter Weise auf einer Leiterplatte nur auf einer der Größe der Einkoppelfläche des Lichtleiters entsprechenden Fläche angeordnet, wobei die Leiterplatte parallel zum Display montiert ist. Vorzugsweise werden als Licht emittierende Elemente High-Optical-Power-LEDs verwendet, welche gegenüber herkömmlichen LEDs deutlich heller sind.The light emitting elements are advantageously on a circuit board only on one of the Size of the coupling area of the Light guide corresponding area arranged, the circuit board mounted parallel to the display is. High-optical power LEDs are preferably used as light-emitting elements used which opposite usual LEDs are significantly brighter.
Gemäß einer bevorzugten Ausführungsform ist der Lichtleiter unterhalb des Displays keilförmig ausgebildet und weist seitlich des Displays eine zur Einkoppelfläche abgewinkelte Ausbildung auf, die mit einer schrägen Außenseite versehen ist. Trifft das Licht der LEDs auf diese schräge Außenseite auf, wird es in den keilförmigen Teil des Lichtleiters umgelenkt, so daß das Licht an der Auskoppelfläche austritt. Diese Um leitung ermöglicht eine gezielte Beleuchtung der gesamten Fläche. Aufgrund der Verwendung der High-Optical-Power-LEDs kann die Fläche in der geforderten Leuchtstärke ausgeleuchtet werden.According to a preferred embodiment the light guide below the display is wedge-shaped and has a design angled to the coupling surface to the side of the display on that with an oblique outside is provided. Strikes the light of the LEDs on this sloping outside on, it becomes in the wedge-shaped Part of the light guide deflected so that the light emerges at the decoupling surface. This enables um targeted lighting of the entire area. Because of the use of the high-optical power LEDs, the area can be illuminated with the required luminosity.
Dadurch, daß die Beleuchtungsanordnung ein Gehäuse aufweist, welches einstückig aus Kunststoff mit dem Lichtleiter, insbesondere im Zwei-Komponenten Spritzguß-Verfahren hergestellt ist, ergibt sich ein besonderer Kostenvorteil bei der Herstellung. Die Verwendung der High-Optical-Power-LEDs sowie die Reduzierung der Anzahl der benötigten LEDs ermöglichen eine Reduzierung der benötigten Platinenfläche und somit eine Bauteilkostenreduzierung.The fact that the lighting arrangement casing which is in one piece made of plastic with the light guide, especially in two-component Injection molding process is produced, there is a special cost advantage at Production. The use of the high-optical power LEDs as well Reduction in the number of LEDs required enable a reduction in the board area required and thus a reduction in component costs.
Nachfolgend wird die Erfindung anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert. Gleiche oder sich entsprechende Elemente in verschiedenen Figuren sind mit gleichen Bezugszeichen versehen.The invention is explained below of the embodiments shown in the figures. Same or corresponding elements in different figures are included provided with the same reference numerals.
Es zeigen:Show it:
Der Umlenkwinkel kann beliebig sein,
so daß je
nach technischer Anforderung die Einspeisung des Lichts nicht parallel
zur Beleuchtungsfläche
des Displays
Die Lichtführung aufgrund der Form des Lichtleiters kann somit optimal erfolgen, so daß bei minimaler Einkoppelfläche ein Maximum an Licht für die Beleuchtung erzielt werden kann.The light guide due to the shape of the light guide can thus be optimal, so that with a minimal coupling area Maximum light for the Lighting can be achieved.
Aus Kostengründen ist das Kunststoffgehäuse einstückig mit dem Lichtleiter und vorzugsweise als Zwei-Komponenten Spritzguß hergestellt.For cost reasons, the plastic housing is in one piece the light guide and preferably manufactured as a two-component injection molding.
Das Display
Insbesondere finden diese Beleuchtungsanordnungen Verwendung in einem Kraftfahrzeug.In particular, they find lighting arrangements Use in a motor vehicle.
- 11
- Gehäusecasing
- 22
- Displaydisplay
- 33
- LEDLED
- 44
- Lichtleiteroptical fiber
- 55
- Außenfläche des LichtleitersOuter surface of the optical fiber
- 66
- Leiterplattecircuit board
- 77
- Rückwandrear wall
- 88th
- Frontblendefront panel
- 99
- Streuscheibediffuser
Claims (7)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002156179 DE10256179A1 (en) | 2002-12-02 | 2002-12-02 | lighting arrangement |
PCT/DE2003/003785 WO2004051318A2 (en) | 2002-12-02 | 2003-11-14 | Illumination arrangement |
EP03785516A EP1567892A2 (en) | 2002-12-02 | 2003-11-14 | Illumination arrangement |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002156179 DE10256179A1 (en) | 2002-12-02 | 2002-12-02 | lighting arrangement |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10256179A1 true DE10256179A1 (en) | 2004-06-17 |
Family
ID=32318891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002156179 Ceased DE10256179A1 (en) | 2002-12-02 | 2002-12-02 | lighting arrangement |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1567892A2 (en) |
DE (1) | DE10256179A1 (en) |
WO (1) | WO2004051318A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10315773A1 (en) * | 2003-04-07 | 2004-11-11 | BSH Bosch und Siemens Hausgeräte GmbH | Display unit for a household appliance |
DE102005042523A1 (en) * | 2005-05-31 | 2006-12-07 | Osram Opto Semiconductors Gmbh | lighting device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2324364A (en) * | 1997-04-19 | 1998-10-21 | Ford Motor Co | Light input device for a light pipe illuminator |
DE19860695A1 (en) * | 1998-12-29 | 2000-07-06 | Siemens Ag | Lighting element, especially for back lighting of LCD in automobile instrument panel comprises light guide with inclined light output face |
DE19957611A1 (en) * | 1999-11-30 | 2001-06-07 | Osram Opto Semiconductors Gmbh | Lighting arrangement |
JP2002270023A (en) * | 2001-03-14 | 2002-09-20 | Matsushita Electric Ind Co Ltd | Surface emitting device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100450542B1 (en) * | 1998-10-29 | 2004-10-01 | 가부시키가이샤 히타치세이사쿠쇼 | Illuminating apparatus and liquid crystal display using the same |
WO2002006891A1 (en) * | 2000-07-17 | 2002-01-24 | Siemens Aktiengesellschaft | Display |
-
2002
- 2002-12-02 DE DE2002156179 patent/DE10256179A1/en not_active Ceased
-
2003
- 2003-11-14 WO PCT/DE2003/003785 patent/WO2004051318A2/en active Application Filing
- 2003-11-14 EP EP03785516A patent/EP1567892A2/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2324364A (en) * | 1997-04-19 | 1998-10-21 | Ford Motor Co | Light input device for a light pipe illuminator |
DE19860695A1 (en) * | 1998-12-29 | 2000-07-06 | Siemens Ag | Lighting element, especially for back lighting of LCD in automobile instrument panel comprises light guide with inclined light output face |
DE19957611A1 (en) * | 1999-11-30 | 2001-06-07 | Osram Opto Semiconductors Gmbh | Lighting arrangement |
JP2002270023A (en) * | 2001-03-14 | 2002-09-20 | Matsushita Electric Ind Co Ltd | Surface emitting device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10315773A1 (en) * | 2003-04-07 | 2004-11-11 | BSH Bosch und Siemens Hausgeräte GmbH | Display unit for a household appliance |
DE102005042523A1 (en) * | 2005-05-31 | 2006-12-07 | Osram Opto Semiconductors Gmbh | lighting device |
US7942565B2 (en) | 2005-05-31 | 2011-05-17 | Osram Opto Semiconductors Gmbh | Illumination device |
Also Published As
Publication number | Publication date |
---|---|
WO2004051318A3 (en) | 2004-09-23 |
WO2004051318A2 (en) | 2004-06-17 |
EP1567892A2 (en) | 2005-08-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE |
|
8131 | Rejection |