CN1712769A

CN1712769A - Light emitting diode lamp with light pipes

Info

Publication number: CN1712769A
Application number: CNA2005100779952A
Authority: CN
Inventors: C·M·库谢恩; M·塔克; T·特斯诺
Original assignee: Osram Sylvania Inc
Current assignee: Osram Sylvania Inc
Priority date: 2004-06-16
Filing date: 2005-06-16
Publication date: 2005-12-28
Anticipated expiration: 2025-06-16
Also published as: CN100554766C

Abstract

An LED light source has a housing having a base. A coreprojects from the base; is substantially cylindrical and is surrounded by tubes. The core and the base are arrayed about a longitudinal axis. A circuit board in the base supports LEDs. Each of the LEDs is positioned with one of the tubes in a one-to-one relationship at one end of the core. A heat sink is positioned in a heat-transferring relationship with the circuit board and a first reflector is attached to another end of the core. To direct the light emitted by the LEDs from the source to the first reflector, the interior of the tubes can be plated with a highly reflective material. In one embodiment, each of the tubes is fitted with a light guide, each light guide extending from a position immediately above one of the LEDs to a position adjacent the reflector.

Description

LED light lamp with light pipe

Technical field

The present invention relates to light source, and relate in particular to the light source that adopts light emitting diode (one or more LED), and more especially relate to and be used for for example light source in vehicle fields such as head lamp, taillight, stop light, fog lamp, cornering lamp.Especially particularly, the present invention relates to be packaged into the light source of realizing industrial acceptable interchangeability.

Background technology

In the past, most of vehicle light sources relate to use incandescent lamp foam.Though operation is good and cost is low, these foams have the short relatively life-span, and certain thin filament that adopts is always easily owing to vibration damages.

In recent years, particularly some application of stop light replaces by LED.These solid state light emitters have the life-span that is difficult to put letter, and its scope and was not easy to suffer vibration fault in 100000 hours.But these LED source rigid lines are connected on its appropriate location, and this increases installation cost.If therefore led light source is arranged to have and is convenient to install incandescent light source, will be a progress so in this area.If led light source is arranged to realize changing the industrial acceptable interchangeability standard of described incandescent lamp foam, will be that another is progressive so in this area.

Summary of the invention

Therefore, the objective of the invention is to eliminate the defective of prior art.

Another object of the present invention is to improve led light source.

Another purpose of the present invention is to provide the led light source with good heat radiating.

In one aspect of the invention, these purposes realize by a kind of led light source is provided, and this light source comprises the housing with bottom, and wherein hollow core stretches out from the bottom, hollow core be substantial cylindrical and center on by a plurality of elongated hollow tube.Hollow core and bottom are arranged around longitudinal axis 19.Printed circuit board (PCB) is positioned in the bottom and has a plurality of LED that operationally fix on it, and each LED of a plurality of LED and an elongated hollow tube are located to concern together one by one at hollow core one end.Fin is located together with heat transfer relation and printed circuit board (PCB), and first reflector is connected on another opposite end of hollow core.

The metal column of having cancelled prior art is simplified construction and reducing cost greatly, wherein needs metal column to go up distribute heat from LED, and LED is mounted to from afar that the position directly emits light into reflector.For example, installation can be dispelled the heat more effectively with the LED that fin directly contacts on printed circuit board (PCB).In addition, fin is installed in the reflector outside, helps once more to dispel the heat from whole lamp.

Description of drawings

Fig. 1 is the perspective view of the embodiment of the invention;

Fig. 2 is the upright sectional view of looking of Fig. 1 embodiment of the invention;

Fig. 3 is the amplification sectional view of photoconduction of the present invention; And

Fig. 4 is the upright sectional view of looking of alternate embodiment of the present invention.

The specific embodiment

In order to understand the present invention and other and further purpose, advantage and ability better, in conjunction with the accompanying drawings, with reference to following explanation and claims.

Now in further detail with reference to the accompanying drawings, Fig. 1 represents led light source 10, and this light source 10 comprises the housing 12 with bottom 14.Hollow core 16 14 stretches out and is substantial cylindrical from the bottom, and centers on by a plurality of elongated hollow tube 18.Hollow core 16 and bottom 14 are arranged around longitudinal axis 19.In a preferred embodiment of the invention, have eight pipes 18; But the actual quantity of pipe can depend on single led light output, and when light output increases, can reduce the quantity of pipe.Printed circuit board (PCB) 20 (see figure 2)s are positioned in the bottom 14, and have and can operate a plurality of LED22 that fix on it.Each of a plurality of LED22 is positioned at an end 24 places of hollow core 16 with relation and elongated hollow tube 18 one by one.Fin 25 and printed circuit board (PCB) are located together with heat transfer relation, and first reflector 26 is connected on the other end 28 of hollow core 16.

For will be from the light source-guide to the reflector 26 by the light of LED emission, but the high reflecting material of inside plating of hollow tube 18.But in a preferred embodiment of the invention, each hollow tube 18 is equipped with photoconduction 30, each photoconduction along the longitudinal axis 31 from extending near the reflector 26 position with a tight position contacting of LED22.The all surface of photoconduction carries out polishing, so that the light LED of maximum is delivered to reflector.As mentioned above, and as clearly shown in Figure 3, photoconduction closely contacts with LED.

Photoconduction 30 can be that any suitable transparent material of for example glass or plastics is made.

Equally, reflector 26 can make its surface " A " change so that change the outward appearance of radiant light greatly, therefore very big flexibility is offered basic foam.

In order to ensure the emission light of maximum by photoconduction 30 guiding, each hollow tube 18 protuberance 32 every end is provided with in so that joint photoconduction 30, thus, photoconduction has air gap 34 between the outer surface 36 of hollow tube 18 and inner surface 38.These features are clearly shown among Fig. 3 more.

Fin 25 be connected to the bottom 14 on, and with printed circuit board (PCB) 20 thermo-contacts.Preferably for example the hot filler 27 of Thermagon 304 is used for forming good thermo-contact between plate 20 and fin 25.Fin 25 has bottom 42, wherein upstanding sidewall 44 ends at a plurality of fingers 46, finger 46 forms on the upper surface 48 that overlaps bottom 14, and can be the type shown in 05/03/2004 submission and the co-pending patent application SN10/838090 that transfers the assignee of the present invention.

Second reflector 50 is positioned on the end 24 of hollow core 16, and has the recessed curved surface 52 that points to first reflector 26.In a preferred embodiment of the invention, recessed curved surface can be a parabola.In another embodiment of the present invention, reflector 26 can be eliminated, and bootable on projection optics from the light of LED emission.

Alternate embodiments of the present invention is illustrated among Fig. 4, and wherein led light source 10a comprises a plurality of photoconduction 30a that separate around longitudinal axis 19a, and each photoconduction 30a has straight part 30b and sweep 30c, and longitudinal axis 19a is left in the sweep extension.

For front embodiment, printed circuit board (PCB) 20 is positioned in the 14a of bottom, and has a plurality of LED22a that operationally fix on it, and each LED22a and a photoconduction 30a are together to concern an end 24a who is positioned at hollow core one by one.

The fin 25a that locatees together with heat transfer relation and described printed circuit board (PCB) and reflector 50a is connected on the end 24a of hollow core 16a.The light of launching from the sweep of photoconduction 30a points to reflector 50a and then outside.This embodiment has cancelled reflector 26.

Though described and illustrated the current the preferred embodiments of the present invention of thinking, those of ordinary skill in the art will appreciate that here can carry out multiple modification and remodeling, and does not depart from the scope of the instant noodles of claims qualification.

Claims

1. led light source comprises:

Housing with bottom;

From the hollow core that stretch out described bottom, described hollow core is a substantial cylindrical, and centers on by a plurality of elongated hollow tube, and described hollow core and described bottom are arranged around longitudinal axis;

Be positioned in the described bottom and have the printed circuit board (PCB) of operationally fixing a plurality of LED on it, each LED of described a plurality of LED and described elongated hollow tube are positioned on the end of described hollow core with one by one relation together;

The fin of locating together with heat transfer relation and described printed circuit board (PCB); And

Be connected to first reflector on the described hollow core other end.

2. led light source as claimed in claim 1 is characterized in that, each described hollow tube is equipped with photoconduction, and each photoconduction extends to the position near described reflector from the position on the LED of described a plurality of LED.

3. led light source as claimed in claim 2 is characterized in that, each described hollow tube is provided with interior protuberance at every end, so that engage described photoconduction, described thus photoconduction has air gap between the outer surface of described hollow tube and inner surface.

4. led light source as claimed in claim 3, it is characterized in that, fin be connected on the described bottom and with described printed circuit board (PCB) thermo-contact, described fin has the bottom, wherein upstanding sidewall ends at a plurality of fingers, and described finger forms the upper surface that covers described bottom.

5. led light source as claimed in claim 4 is characterized in that, second reflector is positioned on the described end of described hollow core, and described second reflector has the curved surface that points to described first reflector.

6. led light source as claimed in claim 5 is characterized in that described curved surface is a parabola.

7. led light source comprises:

Housing with bottom;

From the hollow core that stretch out described bottom, described hollow core is a substantial cylindrical, and comprises a plurality of photoconductions that separate around longitudinal axis, and each described photoconduction has straight part and sweep, and described longitudinal axis is left in described sweep extension;

Be connected to first reflector on the described hollow core other end, the light of launching from the sweep of described photoconduction points to described reflector.

8. led light source as claimed in claim 7 is characterized in that described reflector has parabolical bending.

9. led light source comprises:

Housing with bottom;

The fin of locating together with heat transfer relation and described printed circuit board (PCB).