CN1712769A - LED lights with light pipes - Google Patents

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 ledlight source 10, and thislight source 10 comprises thehousing 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 andbottom 14 are arranged around longitudinal axis 19.In a preferred embodiment of the invention, have eightpipes 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 thebottom 14, and have and can operate a plurality of LED22 that fix on it.Each of a plurality of LED22 is positioned at anend 24 places ofhollow core 16 with relation and elongatedhollow tube 18 one by one.Fin 25 and printed circuit board (PCB) are located together with heat transfer relation, andfirst reflector 26 is connected on theother end 28 ofhollow core 16.

For will be from the light source-guide to thereflector 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, eachhollow tube 18 is equipped withphotoconduction 30, each photoconduction along thelongitudinal axis 31 from extending near thereflector 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 byphotoconduction 30 guiding, eachhollow tube 18protuberance 32 every end is provided with in so thatjoint photoconduction 30, thus, photoconduction hasair gap 34 between theouter surface 36 ofhollow tube 18 and inner surface 38.These features are clearly shown among Fig. 3 more.

Fin 25 be connected to thebottom 14 on, and with printed circuit board (PCB) 20 thermo-contacts.Preferably for example thehot filler 27 of Thermagon 304 is used for forming good thermo-contact betweenplate 20 and fin 25.Fin 25 hasbottom 42, whereinupstanding sidewall 44 ends at a plurality offingers 46,finger 46 forms on theupper surface 48 that overlapsbottom 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 theend 24 ofhollow 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 cancelledreflector 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 (9)

Translated fromChinese

1.一种LED光源，包括：1. A LED light source, comprising:具有底部的壳体；a housing with a bottom;从所述底部伸出的中空芯体，所述中空芯体是大致圆柱形的，并通过多个细长中空管围绕，所述中空芯体和所述底部围绕纵向轴线布置；a hollow core extending from said base, said hollow core being generally cylindrical and surrounded by a plurality of elongated hollow tubes, said hollow core and said base being arranged about a longitudinal axis;定位在所述底部内并具有可操作地固定其上的多个LED的印刷电路板，所述多个LED的每个LED和一个所述细长中空管一起以逐一的关系定位在所述中空芯体的一端上；a printed circuit board positioned within said base and having a plurality of LEDs operably secured thereto, each LED of said plurality of LEDs positioned in one-by-one relationship with one of said elongated hollow tubes on one end of the hollow core;以传热关系和所述印刷电路板一起定位的散热片；以及a heat sink positioned in heat transfer relationship with the printed circuit board; and连接到所述中空芯体另一端上的第一反射器。A first reflector connected to the other end of the hollow core.2.如权利要求1所述的LED光源，其特征在于，每个所述中空管安装有光导，每个光导从所述多个LED的一个LED之上的位置延伸到靠近所述反射器的位置。2. The LED light source of claim 1, wherein each of said hollow tubes is fitted with a light guide, each light guide extending from a position above one of said plurality of LEDs to near said reflector s position.3.如权利要求2所述的LED光源，其特征在于，每个所述中空管在每端设置内突出部，以便接合所述光导，由此所述光导在所述中空管的外表面和内表面之间具有气隙。3. The LED light source of claim 2, wherein each of said hollow tubes is provided with an inner protrusion at each end to engage said light guide, whereby said light guide is outside said hollow tube. There is an air gap between the surface and the inner surface.4.如权利要求3所述的LED光源，其特征在于，散热片连接到所述底部上并且与所述印刷电路板热接触，所述散热片具有底部，其中直立侧壁终止于多个指形件，所述指形件形成为覆盖所述底部的上表面。4. The LED light source of claim 3, wherein a heat sink is attached to said base and in thermal contact with said printed circuit board, said heat sink having a base, wherein upstanding side walls terminate in a plurality of fingers A shape, the finger is formed to cover the upper surface of the bottom.5.如权利要求4所述的LED光源，其特征在于，第二反射器定位在所述中空芯体的所述一端上，所述第二反射器具有指向所述第一反射器的弯曲表面。5. The LED light source of claim 4, wherein a second reflector is positioned on said one end of said hollow core, said second reflector having a curved surface directed toward said first reflector .6.如权利要求5所述的LED光源，其特征在于，所述弯曲表面是抛物线。6. The LED light source of claim 5, wherein the curved surface is a parabola.7.一种LED光源，包括：7. An LED light source, comprising:具有底部的壳体；a housing with a bottom;从所述底部伸出的中空芯体，所述中空芯体是大致圆柱形的，并包括围绕纵向轴线隔开的多个光导，每个所述光导具有直部分和弯曲部分，所述弯曲部分延伸离开所述纵向轴线；a hollow core protruding from the base, the hollow core being generally cylindrical and comprising a plurality of light guides spaced about a longitudinal axis, each of the light guides having a straight portion and a curved portion, the curved portion extending away from said longitudinal axis;定位在所述底部内并具有可操作地固定其上的多个LED的印刷电路板，所述多个LED的每个LED和一个所述细长中空管一起以逐一的关系定位在所述中空芯体的一端上；a printed circuit board positioned within said base and having a plurality of LEDs operably secured thereto, each LED of said plurality of LEDs positioned in one-by-one relationship with one of said elongated hollow tubes on one end of the hollow core;以传热关系和所述印刷电路板一起定位的散热片；以及a heat sink positioned in heat transfer relationship with the printed circuit board; and连接到所述中空芯体另一端上的第一反射器，从所述光导的弯曲部分发射的光指向所述反射器。A first reflector connected to the other end of the hollow core, light emitted from the curved portion of the light guide is directed towards the reflector.8.如权利要求7所述的LED光源，其特征在于，所述反射器具有抛物线的弯曲。8. The LED light source of claim 7, wherein the reflector has a parabolic curvature.9.一种LED光源，包括：9. An LED light source, comprising:具有底部的壳体；a housing with a bottom;从所述底部伸出的中空芯体，所述中空芯体是大致圆柱形的，并通过多个细长中空管围绕，所述中空芯体和所述底部围绕纵向轴线布置；a hollow core extending from said base, said hollow core being generally cylindrical and surrounded by a plurality of elongated hollow tubes, said hollow core and said base being arranged about a longitudinal axis;定位在所述底部内并具有可操作地固定其上的多个LED的印刷电路板，所述多个LED的每个LED和一个所述细长中空管一起以逐一的关系定位在所述中空芯体的一端上；a printed circuit board positioned within said base and having a plurality of LEDs operably secured thereto, each LED of said plurality of LEDs positioned in one-by-one relationship with one of said elongated hollow tubes on one end of the hollow core;以传热关系和所述印刷电路板一起定位的散热片。A heat sink is positioned in heat transfer relationship with the printed circuit board.

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