WO2009135327A1

WO2009135327A1 - Illumination device

Info

Publication number: WO2009135327A1
Application number: PCT/CH2009/000139
Authority: WO
Inventors: Peter Rast
Original assignee: Highlight Illumina Ag
Priority date: 2008-05-05
Filing date: 2009-05-04
Publication date: 2009-11-12
Also published as: CH698808B1

Abstract

The invention relates to an illumination device, also called an illumination body (1), said device being characterised in that at least one semiconductor crystal (7) protected by a transparent protective cap (6) and connected to the power supply (5) is mounted on a rigid illumination carrier (2) containing at least one supply line (3) which is not visible from the outside, and the return line which is not visible from the outside, for the power supply. Said semiconductor crystal is mounted in such a way that the light flux emitted from the crystal (7) during the current conduction is visible from the outside in a hemispherical manner, and the rigid illumination carrier (2) is used as a heat conductor for dissipating the heat produced from the semiconductor crystal (7) during the current conduction.

Description

Device for lighting

The present invention relates to a lighting device.

Innovation in semiconductor physics opens up new areas of application for the light-emitting diode (LED).

LED lamps with a power greater than 50 mA forward current require a special design for heat dissipation. If the heat is not dissipated, then the temperature in the boundary layer of the two semiconductors can rise above 12O ⁰ C.

If the temperature exceeds 12O ⁰ C, then the LED ages disproportionately fast.

Conventional LED lamps are commercially available as spot lights. Such lights have a small light exit angle from the housing. When looking at these luminaires from the side, the light emission from the LED crystal is not visible because the LED crystal is recessed.

The more power an LED lamp has, for example 3 watts, the more important the heat dissipation becomes.

Conventional LED lamps with a typical forward current of 20 mA were not used as luminaires because no special lighting effects could be achieved and because the light emitted by the semiconductor crystal differs from the thermal emitters of the human eye has been perceived as too unattractive.

It is an object of the present invention to provide a lighting device.

In this device, a semiconductor crystal or more semiconductor crystals is to be used so that the energy requirement can be kept to a minimum.

This device should be constructed such that the characteristic of the light emission of the LED light source can also be used decoratively.

This device should be constructed in such a way that sufficient heat is dissipated at a forward current of more than 50 mA.

This device should be feasible in various aesthetically attractive forms.

This device should be able to be used as an energy-saving luminaire, in particular as decoration luminaires or as bundled light emitters, for example spots.

This device should be produced in a simple and cost-effective manner.

If this device is in operation, then there should be no risk of injury when touched; In particular, no burns and electric shocks should be possible. This device should be scalable.

With the present invention, these goals are achieved.

The present invention relates to a device for lighting, also called lighting fixture 1, which is characterized in that on a rigid lighting support 2, inside which at least one not visible from the outside supply line 3 and the invisible from the outside return line 4 for the Power supply 5 are located, at least one protected with a transparent cap 6 semiconductor crystal 7, which is connected to said power supply 5, is mounted such that the luminous flux emitted by the crystal 7 when current flow is hemispherical visible from the outside, and that the rigid illumination carrier 2 serves as a heat conductor for the dissipation of the heat generated at the current flow from the semiconductor crystal 7.

Preferred embodiments of this invention are defined in the dependent claims.

The following part describes possible embodiments of the present invention.

It also refers to the figures.

FIG. 1a shows a cross section through a possible rigid illumination carrier 2 with inserted and clamped tube 11. FIG. 1 b shows a detailed cross section through a possible rigid illumination carrier 2.

FIG. 2 a shows a cross section through a central threaded clamp 15 and the first slot 16.

FIG. 2 b shows a cross section through a central threaded clamp 15 and the second slot 17.

FIG. 2c shows a radial section through a clamp 14 with the third slot 18 and the fourth slot 19.

FIG. 3 shows schematically a possible lighting element according to the invention.

A possible device according to the invention can be produced as follows:

The rigid illumination carrier 2 used was an aluminum rod with a height of 32 mm and a diameter of 25 mm.

At the top of a paragraph with a width of 2 mm and a height of 3 mm was removed.

At the lower part, a bore 20 having a diameter of 6.2 mm and a length of 25 mm was drilled along the central axis.

At a distance of 10 mm from the lower edge, a 5 mm thread 21 was cut radially. From the upper part, two channels 22 with a diameter of 3 mm were drilled at an angle of 30 ° with respect to the central axis in the radius of 8 mm.

In the central bore 20, a 15 cm long steel tube 11 was introduced with a wall thickness of 0.5 mm and a diameter of 6 mm.

In this steel pipe 11, a radial bore 23 of 5 mm was drilled at a distance of 7 cm.

A grub screw 24 was screwed into the radial thread 21 to clamp the steel tube.

If necessary, the outer surface of the rigid lighting support 2 can be enlarged with cooling fins.

The rigid lighting support 2 may in principle have any shape, for example, it may have the shape of a cone, a hemisphere, a cuboid, including any modifications of these forms.

As the semiconductor crystal 7, the product became

Cree XLamp XR-E Led used by Cree, Inc. Durham NC 27703, USA.

This product 7 comprises a carrier 8 and a transparent protective cap 6, which is additionally designed as a lens.

To this product 7, the wires for the electrical lead 3 and the return line 4 were soldered. These wires 3,4 were pulled through the two channels 22, through the steel tube 11 and through the radial bore 23.

Subsequently, the carrier 8 was glued to the upper part of the rigid illumination carrier 2.

The two channels 22 were sealed with a sealant.

If, instead of the steel pipe 11, a rod or wire rope is used as an alternative, then the wires 3,4 are still pulled through the two channels 22.

In this case, the channels 22 must be extended to the lower part of the rigid lighting support 2 and guided at a different angle.

The protective cover 9 made of PMMA was produced by injection molding and had the shape of a cup.

This protective cover 9 had an outer diameter of 25 mm, a height of 21 mm and a wall thickness of 1 mm. This protective cover 9 had at its open end an inner shoulder of 1x2 mm.

The shape of the protective cover 9 interacts with the shape of the rigid lighting support 2.

The optical element 10 used was the product 20 mm Lamberitan from Carclo Technical Plastics, Osset, England. This optical element 10 was adhered to the support 8 of the semiconductor crystal 7.

Subsequently, the protective cover 9 was glued waterproof on the rigid lighting support 2.

As clamp 14, an aluminum rod having a height of 21 mm and a diameter of 20 mm was used.

At the upper part, a 12 mm thread 15 with a depth of 18 mm was cut along the central axis.

At the lower part, a first slot 16 of 6x11 mm and 3 mm radius, passing through the center, was milled out at a height of 3 mm.

The part made in this way was rotated by 90 ° in the counterclockwise direction.

At the lower part, a second slot 17 with 4x11 mm and 2 mm radius extending to the center was milled out at a height of 3 mm.

Between the first slot 16 and the second slot 17, at a height of 3 mm, a third radial slot 18 with a height of 4 mm and a radius of 2 mm was milled over an arc of 90 ° in the clockwise direction.

The manufactured part was rotated by 180 °.

At the lower part was at a height of 3 mm, a radial fourth slot 19 with 4 mm in height and a Milled 2 mm radius over 90 ° arc counterclockwise.

The steel pipe 11 was inserted into the continuous first slot 16 provided in the terminal 14 so that the wires for the electrical lead 3 and the return line 4 could be made downward by the second slot 17 provided in the terminal 14.

Several of these devices produced in this way can be combined as follows to form a luminous element according to the invention.

For the sake of simplicity, the combination of only two of these devices thus produced will be described.

As a fastening device, a wire 13 and one device per terminal 14 was used.

The wire 13 was pulled through the present in the terminal 14 third slot 18 and fourth slot 19.

For clamping, a grub screw was screwed into the 12 mm thread 15 present in terminal 14.

Compared to the wire 13, an arbitrary angle α can be set from 0 ° to 90 °.

As power supply 5, the product was Power

LED converter of the company Barthelme, Nuremberg used. The supply line 3 of the first device was connected to this power supply 5.

The return line 4 of the first device was connected to the supply line 3 of the second device with an electrical connection terminal 26.

The return line 4 of the second device was connected to the wire 13 by an electrical connection terminal 27.

The return line 4 of the power supply 5 has been connected to the other end of the wire rope 13 with an electrical connection terminal 27.

During operation of this luminous element, the heat loss via the rigid lighting support 2, the steel tube 11, the terminal 14 and the wire 13 is discharged to the ambient air.

The inventive device is designed so that even a decorative effect is achieved.

With an inventive device can be saved compared to a thermal radiator about 80% of energy.

The inventive devices and the inventive lighting elements can be used both indoors and outdoors.

The devices according to the invention and the luminous elements according to the invention can be suspended or set up in any manner. In the present invention, the following reference numerals are used:

1 lighting fixture

2 rigid lighting support

3 supply line

4 return

5 power supply

6 protective cap

7 semiconductor crystal

8 additional carriers

9 protective cover

10 optical element

11 rod / tube / wire rope / joint / bracket

12 rigid body

13 rope / rod / tube

14 clamp

15 central thread

16 first slot 17 second slot

18 third slot

19 fourth slot 20 bore 21 radial thread

22 channels

23 radial bore

24 grub screw

25 sealant 26 connection clamp

27 connection terminal.

Claims

claims

1. Lighting device, also called lighting fixture (1), characterized in that on a rigid lighting support (2), in whose interior at least one not visible from the outside supply line (3) and the invisible from the outside return line (4 ) for the power supply (5), at least one semiconductor crystal (7) protected by a transparent protective cap (6), which is connected to the said power supply (5), is mounted in such a way that the current from the crystal (7) Semi-spherical luminous flux is visible from the outside, and that the rigid illumination carrier (2) serves as a heat conductor for dissipating the heat generated during the flow of current from the semiconductor crystal (7).

2. Apparatus according to claim 1, characterized in that between the rigid illumination carrier (2) and the semiconductor crystal (7) is still at least one further carrier (8).

3. Device according to one of claims 1 to

2, characterized in that an open or closed transparent protective cover (9) is mounted on the rigid lighting support (2) on the side on which the semiconductor crystal (7) protected by a transparent protective cap (6) is located, For example, by means of gluing or jamming, and that optionally the outer surface of the rigid lighting support (2) is increased, for example with cooling fins.

4. Device according to one of claims 1 to

3, characterized in that the rigid lighting Support (2) is made of one piece, preferably of a metal or of an alloy, in particular of aluminum, steel, for example stainless steel, brass or copper.

5. Device according to one of claims 1 to

4, characterized in that the transparent protective cap (6) is made of a transparent plastic, and that this protective cap (6) is optionally formed as a lens.

6. Device according to one of claims 1 to

5, characterized in that the semiconductor crystal (7), in particular an LED crystal, preferably such an LED crystal, which at a current strength of 100 mA to 5000 mA, in particular from 300 mA to 5000 mA, preferably from 300 mA to 1000 mA, a luminous flux emitted in the wavelength range of 400 nm to 700 nm, with the rigid illumination support (2) or with the further support (8) is either glued or clamped.

7. Device according to one of claims 1 to 6, characterized in that either

- between the semiconductor crystal (7) and the open or closed transparent protective sheath (9) is an optical element (10) which concentrates the light emitted from the semiconductor crystal (7), or

- That the open or closed transparent protective sheath (9) as an optical element (10) is out ^¬ forms, which bundles the light emitted from the semiconductor crystal (7).

8. Device according to one of claims 1 to

7, characterized in that the open or closed transparent or partially transparent protective cover (9) is made of glass or of a transparent or partially transparent plastic, for example of polycarbonate, PC, or polymethylmethacrylate, PMMA, these materials being optionally colored.

9. Device according to one of claims 1 to

8, characterized in that from 1 to 25 semiconductor crystals (7) are present, which emit in the visible wavelength range.

10. Device according to one of claims 1 to

9, characterized in that the rigid illumination carrier (2) on the side opposite to the semiconductor crystal (7) with one end of a rod / tube / wire rope / joint (11) or a holder

(11) is connected, for example by means of gluing or jamming, in particular a straight or curved rod (11) or a straight or curved tube / wire rope (11), and that at the other end of this rod / tube / wire rope (11) optionally a rigid Body (12) or a device according to one of claims 1 to 9 is mounted, for example by means of gluing or clamping, wherein said rod (11) or said tube / cable / joint (11) or said holder (11) and the called rigid body

(12) are preferably made of a metal or of an alloy, in particular of aluminum, steel, for example stainless steel, brass or copper.

11. luminous element, characterized in that it comprises at least one device according to one of the Proverbs 1 to 10, a fastening device and at least one supply line (3) and a return line (4) for the power supply (5).

12. Luminous element according to claim 11, characterized in that the devices are connected according to one of claims 1 to 10 either in series or in parallel, in particular from 2 to 16 devices, wherein in the case of parallel connection, a constant current source is connected downstream.

13. Luminous element according to one of claims 11 to 12, characterized in that the fastening device either

a rope (13) and at least one clamp (14) or

a rod (13) or a tube (13) and at least one clamp (14) or

- a rigid body

includes.

14. Luminous element according to one of claims 11 to 13, characterized in that either the rigid

Lighting support (2) or the rod (11) or the tube (11) or the joint (11) or the holder (11) is connected to the fastening device.

15. Luminous element according to one of claims 11 to 14, characterized in that the fastening device (13,14) is made of an electrically conductive material and serves as a return line.

16. Luminous element according to one of claims 11 to 15, characterized in that the fastening device (13) is designed as a rope, in which one or more supply line (s) (3) for the power supply (5) is integrated (are), preferably in the way that this lead (s) (3) with the strands of the rope (13) is beaten (finished) to the finished rope, for example with a lay length of 15 mm to 40 mm.