GB2326930A - Light source arrangement - Google Patents

Light source arrangement Download PDF

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Publication number
GB2326930A
GB2326930A GB9812795A GB9812795A GB2326930A GB 2326930 A GB2326930 A GB 2326930A GB 9812795 A GB9812795 A GB 9812795A GB 9812795 A GB9812795 A GB 9812795A GB 2326930 A GB2326930 A GB 2326930A
Authority
GB
United Kingdom
Prior art keywords
arrangement
light sources
light source
light
optical means
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Withdrawn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
GB9812795A
Other versions
GB9812795D0 (en
Inventor
Martin Hueppauff
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB9812795D0 publication Critical patent/GB9812795D0/en
Publication of GB2326930A publication Critical patent/GB2326930A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • 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
    • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
    • F21Y2107/10—Light sources with three-dimensionally disposed light-generating elements on concave supports or substrates, e.g. on the inner side of bowl-shaped supports
    • 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]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

1 LIGHT SOURCE ARRANGEMENT The present invention relates to a light source
arrangement.
2326930 Light sources are known which, especially in the case of a headlamp with focussing of the light beam on a predetermined illumination region, comprise an incandescent lamp, a halogen lamp or a gas-discharge lamp with additional optical means for focussing, for example a parabolic reflector. In these light sources typically only about 40 to 50% of the emitted light can be utilised for illumination of the predetermined region.
Halogen lamps as light sources also have the disadvantage that the emission spectrum of the radiated fight noticeably displaces during the limited life span of the lamp (about 100 to 1000 hours) and, similarly to incandescent lamps, an abrupt failure of the light source is possible. Gas-discharge lamps do, in fact, have a longer life span than the previously mentioned light sources, but they are more costly to produce and consequently more expensive.
According to the present invention there is provided a light source arrangement comprising a plurality of light sources arranged on a carrier and provided individually or in groups with optical means for focussing light beams of the light sources on a least one illumination point or region.
A light source arrangement embodying the invention is particularly advantageous in that the individual light sources can be formed from components with an excellent degree of effectiveness and a long life span. The individual light sources can be so arranged in advantageous manner on a carrier material that each light source or a group of light sources radiates at an own angle with respect to a geometric axis into the field of illumination.
The carrier itself for the light sources can be so formed that the light of each source or a group of the sources is focussed individually on a specific point or a specific region. As a result, the utilisation of the emitted light of each source and the radiation characteristic of the light source arrangement are optimised. Advantageously, however, the optical means for focussing of the light beams comprises a micro-lens arrangement integrated in the light sources or placed thereon. The micro- lens arrangement in that case preferably comprises 2 structured epoxide resin or polymeric or giass-like materials. Moreover, the optical means can comprise a reflector arrangement arranged at the side of the light sources remote from the illumination point or region.
In a particularly preferred embodiment the light sources are lightemitting diodes, the emission spectrum of which does not vary over an extremely high life span. Such diodes are in advantageous manner bonded as semiconductor chips directly, possibly together with the optical means, on a semiconductor substrate serving as carrier material and are thus integrated into a composite.
In a particularly advantageous application of the light source arrangement, this is in the form of a headlamp for a vehicle. Such a headlamp can have, particularly in the case of integration into the bodywork of a motor vehicle, a significantly smaller constructional depth than conventional headlamps, which thus opens up new design possibilities in vehicle construction. Since the individual light sources or groups of light sources can be individually aligned in the headlamp system, the efficiency of the entire system can be increased and the system can remain functionally capable even in the case of failure of one or more of the light sources.
An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawing, the single figure of which is a schematic elevation of part of a motor vehicle headlamp embodying the invention.
Referring now to the drawing there is shown a light source arrangement 1 with a plurality of individual light sources 2, 3 and 4, which arrangement is intended to function as a headlamp. The fight sources 2, 3 and 4 are light-emitting diodes, which are bonded to a semiconductor substrate serving as a carrier 5.
The carrier 5 is so shaped, particularly in the upper region with the light sources 2, that the light beams 6 thereof overall have a radiation characteristic which is focussed at a predetermined point or region in the field of illumination of the headlamp. The light beams 7 and 8 of the light sources 3 and 4 are in that case individually focussed on other points or regions in the field of illumination. Micro-lens or reflector arrangements, which are not shown in detail in the figure and which act as optical means to assist the respective focussing, are mounted in the region of the light sources 2, 3 and 4.
3

Claims (10)

1. A light source arrangement comprising a plurality of light sources arranged on a carrier and provided individually or in groups with optical means for focussing light beams of the light sources on at least one illumination point or region.
2. An arrangement as claimed in claim 1, the optical means comprising a micro-lens arrangement integrated into the light sources.
3. An arrangement as claimed in claim 1, the optical means comprising a micro-lens arrangement placed on the light sources.
4. An arrangement as claimed in claim 2 or claim 3, wherein the microlens arrangement comprises structured epoxide resin or polymeric or glasslike materials.
5. An arrangement as claimed in any one of the preceding claims, the optical means comprising a reflector arrangement arranged at the side of the light source remote from the at least one illumination point or region.
6. An arrangement as claimed in any one of the preceding claims, wherein the light sources comprise light-emitting diodes.
7. An arrangement as claimed in claim 6, wherein the carrier comprises a semiconductor substrate and the diodes are semiconductor chips bonded directly onto the substrate.
8. An arrangement as claimed in claim 7, wherein the optical means together with the diodes are bonded directly onto the substrate.
9. An arrangement as claimed in any one of the preceding claims, wherein the light source arrangement is a headlight for a vehicle.
10. A light source arrangement substantially as hereinbefore described with reference to the accompanying drawings.
GB9812795A 1997-06-30 1998-06-12 Light source arrangement Withdrawn GB2326930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19727701A DE19727701A1 (en) 1997-06-30 1997-06-30 Light source arrangement

Publications (2)

Publication Number Publication Date
GB9812795D0 GB9812795D0 (en) 1998-08-12
GB2326930A true GB2326930A (en) 1999-01-06

Family

ID=7834054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9812795A Withdrawn GB2326930A (en) 1997-06-30 1998-06-12 Light source arrangement

Country Status (2)

Country Link
DE (1) DE19727701A1 (en)
GB (1) GB2326930A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2329011B (en) * 1997-09-04 2001-12-19 Howells Railway Products Ltd Plural-LED lights
EP1070633A3 (en) * 1999-07-19 2003-05-02 Volkswagen Aktiengesellschaft Light with several light sources
US6928180B2 (en) * 2000-03-20 2005-08-09 Gentex Corporation System for controlling exterior vehicle lights

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW493054B (en) * 1999-06-25 2002-07-01 Koninkl Philips Electronics Nv Vehicle headlamp and a vehicle
TW498148B (en) * 1999-06-25 2002-08-11 Koninkl Philips Electronics Nv Vehicle headlamp and a vehicle
DE10009782B4 (en) * 2000-03-01 2010-08-12 Automotive Lighting Reutlingen Gmbh Lighting device of a vehicle
DE10034767A1 (en) * 2000-07-18 2002-05-02 Hella Kg Hueck & Co lamp
DE10130809A1 (en) * 2001-06-26 2003-01-02 Hella Kg Hueck & Co Headlights for vehicles
DE10153031C2 (en) * 2001-10-26 2003-10-23 Audi Ag Vehicle headlights with individually and / or group-controlled electro-optical elements
DE10205779B4 (en) * 2002-02-13 2010-04-15 Bayerische Motoren Werke Aktiengesellschaft headlights
DE10205695B4 (en) * 2002-02-13 2009-07-23 Bayerische Motoren Werke Aktiengesellschaft Headlight of a vehicle
DE20204219U1 (en) * 2002-03-16 2003-07-31 Buechner Thomas Variable illumination device has LEDs on surface that can be at least partly curved concavely at least in one dimension by mechanical effect of arrangement provided to curve surface
DE10227487B4 (en) * 2002-06-19 2013-11-21 Wilo Se lighting device
DE10245296B3 (en) * 2002-09-27 2004-05-19 Audi Ag Lighting device for a motor vehicle and its use as a headlight of the motor vehicle
DE10315133A1 (en) * 2003-04-03 2004-10-14 Hella Kg Hueck & Co. Lighting unit for motor vehicles
JP4170928B2 (en) * 2004-02-18 2008-10-22 株式会社小糸製作所 Vehicle lighting
FR2875577B1 (en) † 2004-09-21 2006-11-24 Valeo Vision Sa LIGHTING AND SIGNALING DEVICE FOR MOTOR VEHICLE
DE102005043058A1 (en) * 2005-08-24 2007-03-01 Plöchinger, Heinz, Dipl.-Ing. Lamp e.g. front headlamp, for motor vehicle, has evaluation and control electronic unit, which controls luminous intensity and radiation characteristics of illuminants based on signal output from sensor
DE102006020961A1 (en) * 2006-05-05 2007-11-08 Hella Kgaa Hueck & Co. Headlights for vehicles
DE102008013603B4 (en) * 2008-03-11 2017-06-22 Automotive Lighting Reutlingen Gmbh Light module for a lighting device
DE102013006053A1 (en) * 2013-04-08 2014-10-09 PRO-Reifen UG (haftungsbeschränkt) lighting device
DE102013223717B4 (en) 2013-11-20 2023-11-30 Automotive Lighting Reutlingen Gmbh Motor vehicle lighting device with two or more OLEDs radiating in the same direction and arranged one after the other in the main light exit direction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158330A2 (en) * 1984-04-10 1985-10-16 GTE Products Corporation Motor vehicle lighting system
US5084804A (en) * 1988-10-21 1992-01-28 Telefunken Electronic Gmbh Wide-area lamp
US5136483A (en) * 1989-09-08 1992-08-04 Schoeniger Karl Heinz Illuminating device
US5477436A (en) * 1992-08-29 1995-12-19 Robert Bosch Gmbh Illuminating device for motor vehicles
WO1997048134A1 (en) * 1996-06-13 1997-12-18 Gentex Corporation Illuminator assembly incorporating light emitting diodes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0158330A2 (en) * 1984-04-10 1985-10-16 GTE Products Corporation Motor vehicle lighting system
US5084804A (en) * 1988-10-21 1992-01-28 Telefunken Electronic Gmbh Wide-area lamp
US5136483A (en) * 1989-09-08 1992-08-04 Schoeniger Karl Heinz Illuminating device
US5477436A (en) * 1992-08-29 1995-12-19 Robert Bosch Gmbh Illuminating device for motor vehicles
WO1997048134A1 (en) * 1996-06-13 1997-12-18 Gentex Corporation Illuminator assembly incorporating light emitting diodes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2329011B (en) * 1997-09-04 2001-12-19 Howells Railway Products Ltd Plural-LED lights
EP1070633A3 (en) * 1999-07-19 2003-05-02 Volkswagen Aktiengesellschaft Light with several light sources
US6928180B2 (en) * 2000-03-20 2005-08-09 Gentex Corporation System for controlling exterior vehicle lights

Also Published As

Publication number Publication date
GB9812795D0 (en) 1998-08-12
DE19727701A1 (en) 1999-01-07

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Legal Events

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)