WO2000046853A1 - Source lumineuse a diodes electroluminescentes - Google Patents
Source lumineuse a diodes electroluminescentes Download PDFInfo
- Publication number
- WO2000046853A1 WO2000046853A1 PCT/FR2000/000154 FR0000154W WO0046853A1 WO 2000046853 A1 WO2000046853 A1 WO 2000046853A1 FR 0000154 W FR0000154 W FR 0000154W WO 0046853 A1 WO0046853 A1 WO 0046853A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diodes
- light
- level
- emitting diodes
- row
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
- F21W2111/06—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for aircraft runways or the like
-
- 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
- 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
- H01L25/10—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 having separate containers
- H01L25/13—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 having separate containers the devices being of a type provided for in group H01L33/00
-
- 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
Definitions
- the present invention relates to the production of light sources using light-emitting diodes and capable of providing very high light intensities.
- the light sources produced according to the invention can be used in very numerous applications and in particular for road or rail signaling, airport markings and in general whenever it is necessary to have an intense light source, reliable and with reduced power consumption.
- the lighting standards are such that it is not possible to replace the filament lamps by light-emitting diodes occupying the same location.
- the present invention provides an important advantage since it allows, at a source surface and constant diode efficiency, to increase the light intensity by source in a proportion of up to 70% and this while maintaining the same reliability.
- the invention consists in increasing the number of diodes by placing them on several levels, a lower level and a higher level for example, and by ensuring that the light emitted by the diodes of the lower levels passes without significant losses through the upper levels, the diode bodies of said upper levels constituting an optical element for said light.
- the invention therefore relates to a light source with light emitting diodes of the type comprising:
- the light-emitting diodes are distributed over at least two levels, an upper level and a lower level, so that the light emitted by the diodes of said lower level passes through a space of the upper level occupied by the diodes placed on said level.
- FIG. 1 is a presentation of a typical arrangement of a light source with light-emitting diodes according to the prior art
- FIG. 2 is a two-view diagram of a typical light-emitting diode used in light sources
- FIG. 3 is a presentation in three views of the principle of an arrangement of light-emitting diodes according to the invention applied to a light source of rectangular shape,
- FIG. 4 is an example of application of the invention to a light source of circular shape
- FIG. 5 is a presentation in three views of a variant of FIG. 3, comprising three levels of diodes, and applied to a light source of rectangular shape,
- FIG. 6 is a presentation in two views of a variant of the invention, applied to a light source of rectangular shape
- FIG. 7 is a second example of application to a light source of rectangular shape of the variant of FIG. 5,
- FIG. 8 is an example of application to a light source of circular shape of the variant of FIG. 5,
- FIG. 9 is a three-view presentation of a variant of FIG. 6, comprising three levels of diodes, and applied to a rectangular light source,
- FIG. 10 is a variant of the invention applied to a light source of circular shape
- FIG. 11 is a presentation of a wide field variant of a light source according to the invention.
- FIG. 1 shows an example of a circular light source according to the prior art in which light-emitting diodes 1 are arranged in rows, 2, 3, 4 etc. These rows can be placed side by side, 2 and 3 for example, or nested, 3 and 4 for example, to optimize the use of the available surface.
- the total light power is obviously limited to the available surface and to the number of light-emitting diodes which can be placed there.
- FIG. 2 shows one of the typical arrangements of a light-emitting diode 5 which can be used in the invention.
- a light-emitting diode 5 which can be used in the invention.
- Such a diode comprises a body 6 substantially cylindrical or elliptical with axis 7, terminated at one of its ends by a surface 8 substantially hemispherical or ellipsoidal, having a vertex 9 placed substantially on axis 7, and at the other by a substantially flat surface 10.
- Light is emitted by a radiating source 11 placed substantially in the center of said hemispherical or ellipsoidal surface 8 from which it exits in a cone 12 whose shape depends on the construction characteristics of the diode and having a axis 13 substantially collinear with axis 7 of body 6 of said diode.
- the electrical supply is made by connections 14 which exit from the flat face 10.
- the light-emitting diodes 1 are arranged on two levels, an upper level 15 and a lower level 16 so that the light emitted by the diodes of the lower level crosses a space 17 where the diodes of the upper level are located.
- the upper level 15 comprises at least one row 18 of at least two diodes 1, having an axis 19, and preferably two or more rows, placed in parallel, two adjacent diodes being separated by a step 20, at least equal to their width and preferably less than twice their width, the rows 18 being separated by a center distance 21.
- the lower level 16 preferably comprises the same number of rows of diodes 22 as the upper level 15, of at least one diode each , and placed below the diodes of the upper level, their axes 19 being substantially superimposed, so that the diodes 22 of the lower level are offset substantially by one half step 20, along the axis 19, relative to the diodes 1 of the upper level and thus their apex 9 is opposite a zone 23 where two diodes of the upper level are close or tangent, this arrangement allows passing the connections 14 of the diodes of the upper level on each side of a zone 24 where the diodes 22 of the lower level are close or tangent.
- the diodes 1 of the upper level 15 can be chosen with an output beam 25 forming a wide angle ⁇ . In the most frequent case where the light source must cover a wider field than high, it is advantageous to use diodes having an elliptical output beam and to orient them so that the greatest width of said beam is substantially parallel to the largest dimension of the field to be covered.
- the diodes of the lower level 16 are advantageously chosen with a narrower output beam 26.
- the rays of the beams 26 emitted by the diodes 22 of the lower level 16 enter the diodes 1 of the upper level 15 through their planar part 10 undergoing a refraction which tends to slightly tighten said beams. These then pass through the diodes 1 of said upper level 15 passing by the radiating sources 11 of said diodes 1 and emerge through their hemispherical or ellipsoidal part 8 undergoing a new refraction, much greater than the previous one. This latter refraction tends to widely spread the rays and to create exit beams 27 having an angle ⁇ similar to the angle ⁇ of the exit beams 25 of the diodes of the upper level 15.
- the body 6 and the hemispherical or ellipsoidal end 8 diodes 1 of upper level thus constitute an additional optical element for shaping the light emitted by the diodes 22 of the lower level.
- All the light-emitting diodes are connected to a power supply preferably by means of a printed circuit 28 on which the connections 14 of said diodes are soldered.
- This arrangement can obviously be applied with any number of rows 18 and any number of diodes 1 or 22 on each of the two levels to produce sources of any shape and which can in particular be square, rectangular or circular.
- FIG. 4 shows a typical arrangement of the application of the invention to a source of circular shape 29 comprising, for example, 8 rows 30 to 37.
- each row of lower level may include a number of diodes 22 less, equal or even greater than the number of diodes 1 in the corresponding row of the upper level.
- the rows 30, 31, 33, 34, 36 and 37 comprise, at the upper level, a diode 1 more than the number of diodes 22 of the lower level.
- the rows 32 and 35 which are offset by a quarter of the center line 20, along their axis 19, relative to the other rows, have a number identical diodes on each of the two levels.
- FIG. 5 shows a variant of the principle of FIG. 4 in which light-emitting diodes are spread over three levels.
- at least one and preferably several light-emitting diodes 38 are placed on a third level 40, substantially under the diodes 22 of the lower level, preferably between the printed circuit 28 and the flat face 10 of said diodes 22 of the lower level 16.
- additional diodes 39 can be placed between the diodes 38 substantially at middle of the inter-axis 21 separating the rows 18. It is also possible to tighten the rows of the diodes 38 and 39 so that they no longer correspond either to the rows 18 or to the middle of their center distance. The number of said diodes 38 and 39 can thus be further increased and this as a function of their size and the size of their connections.
- the light-emitting diodes are also arranged on two or three levels.
- the upper level 15 also comprises at least two rows 18 of at least two diodes 1 placed in parallel, two adjacent diodes 1 being separated by a pitch 20 at least equal to their width and preferably less at twice their width, the rows 18 being separated by a center distance 21.
- the lower level 16 comprises at least one row of at least one diode 22, offset by half a step 20 along the axis 19 and by a half distance between axes 21 perpendicular to said axis, so that said diode 22 emits most of its light in a space 41 delimited by four quarters of circle and left free between four diodes, 42, 43, 44 and 45 for example, adjacent two by two on two rows 18 of the upper level 15.
- This arrangement can be applied with any number of rows of any number of diodes to the next level.
- FIG. 7 shows the application with three rows 18 of diodes 1 at the upper level and two rows 48 of diodes 22 at the lower level. It is obvious that it is possible to place at the lower level a number of rows of light-emitting diodes equal or greater than that of the upper level, without departing from the scope of the invention.
- Figure 8 shows the application of this variant to a circular source.
- Figure 9 shows the application of this variant to a rectangular source having three diode levels.
- at least one and preferably several light-emitting diodes 38 are placed on a third level 40, under the diodes 22 of the lower level 16 , preferably between the printed circuit 28 and the planar face 10 of said diodes 22. They can be arranged by forming rows 46 perpendicular to the rows 18 of the upper levels.
- the diodes 38 are separated by an interval 47 which can be as small as possible or for example equal to half an inter-axis 21 separating two rows 18.
- This variant can obviously be applied to a source of circular or arbitrary shape.
- the rows of diodes 18 can be curved and thus the diodes of the two or three levels can be arranged in concentric circles, as shown in Figure 10 for two levels.
- the diodes 1 of the upper level 15 are placed, for example, on three circles, around a central diode 49.
- the smallest circle has at most six diodes, the next circle at most twelve diodes, the third circle at most eighteen diodes and so on if we add other circles.
- the lower level 16 also comprises at least one circle also comprising at most six diodes 22.
- the circle inside the lower level is offset by an angle ⁇ equal to about 30 degrees so that each of its diodes 22 is located substantially under an area 23 where the diodes 1 of the inner circle of the upper level 15 are close or tangent.
- the second circle is offset by an angle ⁇ equal to about 15 degrees so as to obtain the same result.
- the third circle is offset by an angle ⁇ equal to about 10 degrees and so on if we add other circles.
- This variant can also receive a third level of diodes under the second level. The number and arrangement of these diodes can be very diverse depending on the type of diodes chosen.
- the printed circuit 29 of one of the variants described above can be broken down into two or more planes, three for example, 48, 49 and 50, inclined with respect to each other, as well as FIG. 10 shows it, so as to orient the light-emitting diodes in at least two different directions and thus to provide illumination over an angle ⁇ wider than the angles ⁇ or ⁇ obtained with a flat printed circuit.
- a curved molded printed circuit in the form of a portion of a cylinder, a portion of a sphere or of any other shape, makes it possible to obtain very varied light distributions and therefore to respond easily. to any kind of lighting specification.
- the different variants of the invention can receive diodes of different shapes on the same level or from one level to another without departing from the scope of the invention.
- diodes of different colors may be advantageous to use, for the different levels, diodes of different colors, or else to distribute said diodes of different colors on each of the levels to obtain particular effects both on the field covered and on the product aspect.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Details Of Measuring Devices (AREA)
- Led Device Packages (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU30592/00A AU3059200A (en) | 1999-02-01 | 2000-01-25 | Light source with light-emitting diodes |
EP00900654A EP1155454A1 (fr) | 1999-02-01 | 2000-01-25 | Source lumineuse a diodes electroluminescentes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/01102 | 1999-02-01 | ||
FR9901102A FR2789258B1 (fr) | 1999-02-01 | 1999-02-01 | Source lumineuse a diodes electroluminescentes |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000046853A1 true WO2000046853A1 (fr) | 2000-08-10 |
Family
ID=9541439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/000154 WO2000046853A1 (fr) | 1999-02-01 | 2000-01-25 | Source lumineuse a diodes electroluminescentes |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1155454A1 (fr) |
AU (1) | AU3059200A (fr) |
FR (1) | FR2789258B1 (fr) |
WO (1) | WO2000046853A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT7402U1 (de) * | 2004-04-08 | 2005-03-25 | Rosenitsch Harald Ing | Gefahrenfeuer |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6218775A (ja) * | 1985-07-18 | 1987-01-27 | Stanley Electric Co Ltd | Ledランプ |
JPH07326212A (ja) * | 1994-05-31 | 1995-12-12 | Noda Denshi Kogyo Kk | 電子炎灯 |
WO1998049872A1 (fr) * | 1997-04-30 | 1998-11-05 | Signal House Limited | Feux de signalisation |
-
1999
- 1999-02-01 FR FR9901102A patent/FR2789258B1/fr not_active Expired - Fee Related
-
2000
- 2000-01-25 WO PCT/FR2000/000154 patent/WO2000046853A1/fr active Search and Examination
- 2000-01-25 EP EP00900654A patent/EP1155454A1/fr not_active Withdrawn
- 2000-01-25 AU AU30592/00A patent/AU3059200A/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6218775A (ja) * | 1985-07-18 | 1987-01-27 | Stanley Electric Co Ltd | Ledランプ |
JPH07326212A (ja) * | 1994-05-31 | 1995-12-12 | Noda Denshi Kogyo Kk | 電子炎灯 |
WO1998049872A1 (fr) * | 1997-04-30 | 1998-11-05 | Signal House Limited | Feux de signalisation |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 011, no. 190 (E - 517) 18 June 1987 (1987-06-18) * |
PATENT ABSTRACTS OF JAPAN vol. 096, no. 004 30 April 1996 (1996-04-30) * |
Also Published As
Publication number | Publication date |
---|---|
AU3059200A (en) | 2000-08-25 |
FR2789258B1 (fr) | 2001-03-30 |
EP1155454A1 (fr) | 2001-11-21 |
FR2789258A1 (fr) | 2000-08-04 |
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