DE10245932B3 - Light-emitting diode illumination device has spaces provided between side edges of adjacent light-emitting diodes for output of emitted light - Google Patents

Light-emitting diode illumination device has spaces provided between side edges of adjacent light-emitting diodes for output of emitted light Download PDF

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Publication number
DE10245932B3
DE10245932B3 DE10245932A DE10245932A DE10245932B3 DE 10245932 B3 DE10245932 B3 DE 10245932B3 DE 10245932 A DE10245932 A DE 10245932A DE 10245932 A DE10245932 A DE 10245932A DE 10245932 B3 DE10245932 B3 DE 10245932B3
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Prior art keywords
light
emitting diodes
group
lighting device
emitting
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Expired - Fee Related
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DE10245932A
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German (de)
Inventor
Kai Hohmann
Heinrich Dr. Noll
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Continental Automotive GmbH
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Siemens AG
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    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • 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

Abstract

The illumination device has groups of light-emitting diodes (1,2,3,4) mounted on a carrier, the 4 light-emitting diodes in each group positioned at the corners of a square, to provide spaces between the side edges of the adjacent light-emitting diodes for output of the emitted light (11). Each light-emitting diode group can be positioned on a sub-mount (5) with a square surface, the light-emitting diodes aligned with its diagonals, with a reflector (7) around the outside of the sub-mount.

Description

Die Erfindung betrifft eine Beleuchtungseinrichtung mit in Gruppen auf einem Träger angeordneten Leuchtdioden, welche Leuchtdioden jeweils einer Gruppe gegeneinander derart angeordnet sind, dass zwischen den Seitenflächen benachbarter Leuchtdioden Platz zur Abstrahlung von Licht über die jeweilige Leuchtdiode vorhanden ist, wie beispielsweise aus der DE 198 48 078 A1 bekannt.The invention relates to a lighting device with light-emitting diodes arranged in groups on a carrier, which light-emitting diodes are each arranged in a group in relation to one another in such a way that there is space between the side faces of adjacent light-emitting diodes for emitting light via the respective light-emitting diode, such as from the DE 198 48 078 A1 known.

Bildwiedergabevorrichtungen mit Lichtventilen, insbesondere Flüssigkristall-Displays, benötigen eine genügend helle und gleichmäßige Hinterleuchtung. Dies wird bei größeren Displays, wie beispielsweise Computer-Bildschirmen, mit Leuchtstoffröhren erzielt. Bei Anwendungen, die eine sehr hohe Leuchtdichte erfordern, reichen die bekannten Beleuchtungseinrichtungen jedoch nicht aus. So wird beispielsweise für sogenannte Head-up-Displays in Kraftfahrzeugen eine sehr hohe Leuchtdichte gefordert, da das Spiegelbild des Displays auch bei großer Umgebungshelligkiet noch sichtbar sein muss.Image display devices with light valves, especially liquid crystal displays, need one enough bright and even backlighting. This is with larger displays, such as computer screens, achieved with fluorescent tubes. For applications that require a very high luminance, enough the known lighting devices, however, are not. So will for example for so-called head-up displays a very high luminance is required in motor vehicles, since that Mirror image of the display even with large ambient brightness must be visible.

Aus der Deutschen Offenlegungsschrift DE 198 48 078 A1 ist bereits die Gruppierung von Leuchtdioden in einer die Effizienz der Abstrahlung verbessernden ringförmigen Anordnung bekannt, wobei jedoch hier eine ungünstige gegenseitige Abschirmung der Abstrahlung durch die benachbarten Leuchtdioden stattfindet.From the German Offenlegungsschrift DE 198 48 078 A1 the grouping of light-emitting diodes in a ring-shaped arrangement which improves the efficiency of the radiation is already known, but here an unfavorable mutual shielding of the radiation by the neighboring light-emitting diodes takes place.

Zur Hinterleuchtung von Flüssigkristall-Displays sowie für andere Zwecke, die eine lichtemittierende Fläche erfordern, kön nen Leuchtdiodenraster eingesetzt werden. Zur Erzielung einer hohen Leuchtdichte ist dabei an sich eine möglichst dichte Anordnung von Leuchtdioden wünschenswert. Es hat sich jedoch herausgestellt, dass bei einem geringen Abstand von beispielsweise in einem rechteckigen Raster angeordneten Leuchtdioden die seitliche Abstrahlung der Leuchtdioden nicht aus dem Raster heraustritt, sondern in benachbarten Leuchtdioden absorbiert wird. Dies führt zu einer Verringerung des Wirkungsgrades, da die absorbierte Strahlung in Wärme umgewandelt wird.For backlighting liquid crystal displays also for other purposes that require a light-emitting surface, NEN light emitting diode grid can be used become. To achieve a high luminance is in itself one if possible dense arrangement of LEDs is desirable. However, it has found that at a short distance of, for example light emitting diodes arranged in a rectangular grid, the lateral radiation the LEDs do not emerge from the grid, but in neighboring ones LEDs is absorbed. This leads to a reduction in efficiency, because the absorbed radiation is converted into heat.

Aufgabe der Erfindung ist es, bei einer Beleuchtungseinrichtung nach der Gattung des Hauptanspruchs die genannten Nachteile zu vermeiden.The object of the invention is to a lighting device according to the preamble of the main claim to avoid the disadvantages mentioned.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Leuchtdioden einer Gruppe kreuzförmig angeordnet sind.This object is achieved according to the invention solved, that the LEDs of a group are arranged in a cross shape.

Die erfindungsgemäße Beleuchtungseinrichtung hat den Vorteil, dass der weitaus größte Teil des von den Leuchtdioden emittierten Lichts auch aus der Beleuchtungseinrichtung abgestrahlt wird.The lighting device according to the invention has the advantage that the vast majority of that from the LEDs emitted light also emitted from the lighting device becomes.

Eine besonders vorteilhafte Weiterbildung der Erfindung besteht darin, dass vier Leuchtdioden jeweils eine Gruppe bilden. Je nach Verwendungszweck im Einzelnen können die zu einer Gruppe gehörenden Leuchtdioden Licht verschiedener Farben oder gleicher Farbe abstrahlen.A particularly advantageous development of Invention is that four LEDs each have a group form. Depending on the intended use, the LEDs belonging to a group can Radiate light of different colors or the same color.

Aus thermischen und konstruktiven Gründen hat es sich bei dieser Weiterbildung als günstig herausgestellt, wenn jeweils eine Gruppe auf einem Submount angeordnet ist. Hierbei ist vorzugs weise vorgesehen, dass das Submount eine quadratische Grundfläche aufweist, und dass die Leuchtdioden diagonal angeordnet sind.From thermal and constructive Has reasons it turned out to be favorable with this further training if one group is arranged on a submount. Here is preferably provided that the submount has a square base, and that the LEDs are arranged diagonally.

Grundsätzlich kann jedoch die Erfindung auch ohne die Verwendung von Submounts angewendet werden. Unabhängig davon kann vorgesehen sein, dass die Gruppen rasterförmig zueinander angeordnet sind und dass die Leuchtdioden einen Winkel von 45° zur Richtung des Rasters einnehmen.In principle, however, the invention can also can be applied without the use of submounts. Independently of it can be provided that the groups are arranged in a grid pattern with respect to one another and that the LEDs are at an angle of 45 ° to the direction of the grid.

Um den Abstrahlwinkel zu verringern und insbesondere das seitlich aus den Leuchtdioden austretende Licht zu bündeln, kann gemäß einer anderen Weiterbildung vorgesehen sein, dass jeweils eine Gruppe von einem Reflektor mit schräg stehenden Reflektorflächen umgeben ist.To reduce the beam angle and in particular the light emerging laterally from the light-emitting diodes to bundle can according to one Other training can be provided that a group from a reflector with oblique standing reflector surfaces is surrounded.

Die Erfindung lässt zahlreiche Ausführungsformen zu. Eine davon ist schematisch in der Zeichnung anhand mehrerer Figuren dargestellt und nachfolgend beschrieben. Es zeigt:The invention leaves numerous embodiments to. One of them is schematic in the drawing based on several Figures shown and described below. It shows:

1 eine Draufsicht eines Ausführungsbeispiels mit einer Gruppe von vier Leuchtdioden, 1 2 shows a plan view of an exemplary embodiment with a group of four light-emitting diodes,

2 einen Schnitt durch das Ausführungsbeispiel nach 1, 2 a section through the embodiment 1 .

3 ein Beispiel einer Vergleichseinrichtung, bei welcher die Leuchtdioden dicht nebeneinander angeordnet sind und 3 an example of a comparison device in which the light-emitting diodes are arranged close to each other and

4 einen Schnitt durch das Beispiel nach 3. 4 a section through the example 3 ,

In beiden Beispielen sind vier quaderförmige Leuchtdioden 1 bis 4 auf einem Submount 5 angeordnet, das wiederum auf einem plattenförmigen Träger 6 befestigt ist. Der plattenförmige Träger 6 besteht aus einem gut Wärme leitenden Werkstoff, beispielsweise Aluminium, und weist gegebenenfalls einen in den Figuren nicht dargestellten Kühlkörper auf.In both examples there are four rectangular light-emitting diodes 1 to 4 on a submount 5 arranged, which in turn on a plate-shaped carrier 6 is attached. The plate-shaped carrier 6 consists of a good heat-conducting material, for example aluminum, and optionally has a heat sink, not shown in the figures.

Die Gruppe der Leuchtdioden 1 bis 4 ist von einem Reflektor 7 umgeben, der seitlich aus den Leuchtdioden austretende Strahlung in eine im Wesentlichen senkrecht zum Träger 6 liegende Abstrahlrichtung umlenkt, was in 4 durch einen Lichtstrahl 8 angedeutet ist. Bei dem Vergleichsbeispiel nach 3 und 4 wird jedoch Licht, das von Seitenflächen emittiert wird, die nicht am Außenrand einer Gruppe liegen, von den jeweils benachbarten Leuchtdioden absorbiert, was in 4 durch einen Pfeil 10 veranschaulicht ist. Von insgesamt vier Seitenflächen jeweils einer Leuchtdiode sind, wie aus 3 ohne weiteres ersichtlich ist, zwei Seitenflächen betroffen.The group of LEDs 1 to 4 is from a reflector 7 surrounded, the radiation emerging laterally from the light emitting diodes in a substantially perpendicular to the carrier 6 lying beam direction redirects what in 4 through a beam of light 8th is indicated. In the comparative example 3 and 4 However, light that is emitted from side surfaces that are not on the outer edge of a group is absorbed by the respectively neighboring light-emitting diodes, which in 4 by an arrow 10 is illustrated. Of a total of four side surfaces, one LED is like out 3 is readily apparent, two side surfaces affected.

Bei dem erfindungsgemäßen Beispiel kann jedoch das von jeweils drei Seitenflächen emittierte Licht abgestrahlt werden, was in 1 durch Pfeile 11 verdeutlicht wird.In the example according to the invention, however, the light emitted from three side surfaces in each case can be emitted, which is shown in 1 by arrows 11 is made clear.

Claims (6)

Beleuchtungseinrichtung mit in Gruppen auf einen Träger angeordneten Leuchtdioden (1, 2, 3, 4), welche Leuchtdioden (1, 2, 3, 4) jeweils in einer Gruppe gegeneinander derart angeordnet sind, dass zwischen den Seitenflächen benachbarter Leuchtdioden (1, 2, 3, 4) Platz zur Abstrahlung von Licht über die jeweilige Leuchtdiode hinaus vorhanden ist, dadurch gekennzeichnet, dass die eine Gruppe bildenden Leuchtdioden (1, 2, 3, 4) kreuzförmig angeordnet sind.Lighting device with light-emitting diodes arranged in groups on a carrier ( 1 . 2 . 3 . 4 ) which LEDs ( 1 . 2 . 3 . 4 ) are arranged in a group against each other in such a way that between the side surfaces of adjacent light-emitting diodes ( 1 . 2 . 3 . 4 ) There is space for emitting light beyond the respective light-emitting diode, characterized in that the light-emitting diodes forming a group ( 1 . 2 . 3 . 4 ) are arranged in a cross shape. Beleuchtungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass vier Leuchtdioden (1, 2, 3, 4) jeweils eine Gruppe bilden.Lighting device according to claim 1, characterized in that four light-emitting diodes ( 1 . 2 . 3 . 4 ) each form a group. Beleuchtungseinrichtung nach Anspruch 2, dadurch gekennzeichnet, dass jeweils eine Gruppe auf einem Submount (5) angeordnet ist.Lighting device according to claim 2, characterized in that in each case a group on a submount ( 5 ) is arranged. Beleuchtungseinrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Submount (5) eine quadratische Grundfläche aufweist und dass die Leuchtdioden (1, 2, 3, 4) diagonal angeordnet sind.Lighting device according to claim 3, characterized in that the submount ( 5 ) has a square base and that the light-emitting diodes ( 1 . 2 . 3 . 4 ) are arranged diagonally. Beleuchtungseinrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Gruppen rasterförmig zueinander angeordnet sind und dass die Leuchtdioden (1, 2, 3, 4) einen Winkel von 45° zur Richtung des Rasters einnehmen.Lighting device according to claim 2, characterized in that the groups are arranged in a grid pattern with respect to one another and that the light-emitting diodes 1 . 2 . 3 . 4 ) take an angle of 45 ° to the direction of the grid. Beleuchtungseinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jeweils eine Gruppe von einem Reflektor (7) mit schräg stehenden Reflektorflächen umgeben ist.Lighting device according to one of the preceding claims, characterized in that in each case one group of a reflector ( 7 ) is surrounded by sloping reflector surfaces.
DE10245932A 2002-09-30 2002-09-30 Light-emitting diode illumination device has spaces provided between side edges of adjacent light-emitting diodes for output of emitted light Expired - Fee Related DE10245932B3 (en)

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DE10245932A DE10245932B3 (en) 2002-09-30 2002-09-30 Light-emitting diode illumination device has spaces provided between side edges of adjacent light-emitting diodes for output of emitted light

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DE10245932A DE10245932B3 (en) 2002-09-30 2002-09-30 Light-emitting diode illumination device has spaces provided between side edges of adjacent light-emitting diodes for output of emitted light

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005059198A1 (en) * 2005-12-06 2007-06-21 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Fluorescent light
US10593854B1 (en) 2006-12-11 2020-03-17 The Regents Of The University Of California Transparent light emitting device with light emitting diodes
US11592166B2 (en) 2020-05-12 2023-02-28 Feit Electric Company, Inc. Light emitting device having improved illumination and manufacturing flexibility
US11876042B2 (en) 2020-08-03 2024-01-16 Feit Electric Company, Inc. Omnidirectional flexible light emitting device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818402A1 (en) * 1998-04-24 1999-10-28 Horn Hannes Schulze Arrangement for illumination and signaling purposes produces light that is friendly to the eye
DE19848078A1 (en) * 1998-10-19 2000-04-20 Insta Elektro Gmbh & Co Kg Platelet arrangement for random formation of LED illumination units, comprises platelets of polygonal shape in flat interconnection by strips
US6220722B1 (en) * 1998-09-17 2001-04-24 U.S. Philips Corporation Led lamp
JP2001195904A (en) * 2000-01-12 2001-07-19 Gc Corp Roentgen film viewer and display apparatus
US6452217B1 (en) * 2000-06-30 2002-09-17 General Electric Company High power LED lamp structure using phase change cooling enhancements for LED lighting products
DE20214661U1 (en) * 2002-09-06 2002-12-05 Signal Construct Elektro Optis Festoon

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19818402A1 (en) * 1998-04-24 1999-10-28 Horn Hannes Schulze Arrangement for illumination and signaling purposes produces light that is friendly to the eye
US6220722B1 (en) * 1998-09-17 2001-04-24 U.S. Philips Corporation Led lamp
DE19848078A1 (en) * 1998-10-19 2000-04-20 Insta Elektro Gmbh & Co Kg Platelet arrangement for random formation of LED illumination units, comprises platelets of polygonal shape in flat interconnection by strips
JP2001195904A (en) * 2000-01-12 2001-07-19 Gc Corp Roentgen film viewer and display apparatus
US6452217B1 (en) * 2000-06-30 2002-09-17 General Electric Company High power LED lamp structure using phase change cooling enhancements for LED lighting products
DE20214661U1 (en) * 2002-09-06 2002-12-05 Signal Construct Elektro Optis Festoon

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005059198A1 (en) * 2005-12-06 2007-06-21 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Fluorescent light
US7794121B2 (en) 2005-12-06 2010-09-14 Arnold & Richter Cine Technik Gmbh & Co. Betriebs Kg Two-dimensional luminaire
US10593854B1 (en) 2006-12-11 2020-03-17 The Regents Of The University Of California Transparent light emitting device with light emitting diodes
US10644213B1 (en) 2006-12-11 2020-05-05 The Regents Of The University Of California Filament LED light bulb
US10658557B1 (en) 2006-12-11 2020-05-19 The Regents Of The University Of California Transparent light emitting device with light emitting diodes
US11592166B2 (en) 2020-05-12 2023-02-28 Feit Electric Company, Inc. Light emitting device having improved illumination and manufacturing flexibility
US11796163B2 (en) 2020-05-12 2023-10-24 Feit Electric Company, Inc. Light emitting device having improved illumination and manufacturing flexibility
US11876042B2 (en) 2020-08-03 2024-01-16 Feit Electric Company, Inc. Omnidirectional flexible light emitting device

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Owner name: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE

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