CN1710321A

CN1710321A - Light emitting diode lamp with conically focused light guides

Info

Publication number: CN1710321A
Application number: CN 200510078562
Authority: CN
Inventors: C·M·库谢恩; M·塔克; T·特斯诺; R·约翰逊; S·西德维尔
Original assignee: Osram Sylvania Inc
Current assignee: Osram Sylvania Inc
Priority date: 2004-06-17
Filing date: 2005-06-17
Publication date: 2005-12-21

Abstract

A lamp component has a support with a base surrounded by an interior wall defining a cavity with a central axis. A plurality of LEDs are supported on the interior wall and generally aimed to direct light towards the central axis. A center piece has a first reflective surface shaped and positioned to intercept light received from the LEDs and reflect such received light generally in a direction parallel to the axis.

Description

The LED light lamp that has the light guide of taper focusing

Technical field

Present invention relates in general to light source, relate in particular to the light source of the lamp that adopts light emitting diode (LED), relate to the light source that is used for automotive field especially, for example head lamp, taillight, stop light, fog lamp, steering indicating light etc.

Background technology

In the past, the light source of Jue Daduoshuo automobile-use relates to the use of incandescent lamp bulb.Although the incandescent lamp working condition well and not expensive, its life-span is shorter, and the thin filament of its use often ruptures because of vibration easily certainly.

Replace its part to use particularly spotlight recently by LED.The life-span of these solid state light emitters is very long, reaches about 100000 hours, and is not easy to occur vibration damage.If the lighting use of LED can extend to other field of motor vehicle illumination, if be fully controllable for the luminous of special-purpose particularly, then this will be the improvement of this area.

Summary of the invention

Therefore, a purpose of the present invention is to overcome the defective of prior art.Another object of the present invention is improved the LED illumination that is used for the motor vehicle purposes.According to one aspect of the present invention, these purposes realize in the following manner,, provide a kind of lamp part that is, and it comprises: have the supporting member of base portion, this base portion is surrounded by inwall, and this inwall limits the chamber that has central axis; A plurality of light emitting diodes, described light emitting diode are bearing on this inwall and rough alignment becomes to make this central axis of light directive; With the central part with first reflecting surface, the shape of this first reflecting surface and position are specified to be convenient to tackle the light that receives from this light emitting diode and to make the wide of this reception cause along the direction reflection that is parallel to this axis.Make and to carry out good control to the color and the luminous intensity of the light that sent towards the use of a plurality of light emitting diodes of single optics.This result also makes light emitting diode and thermal component install to be connected, so that heat rejection and removal efficiently.

Description of drawings

Fig. 1 is the front elevational schematic of embodiments of the invention;

Fig. 2 is the plane of one of them parts of lamp shown in Figure 1;

Fig. 3 is the front elevational schematic of alternate embodiment of the present invention;

Fig. 4 is the similar view of another embodiment of the present invention;

Fig. 5 is the similar view of an embodiment more of the present invention;

Fig. 6 is the plane of the optical reflector that can use with the present invention;

Fig. 7 is the view of the alternate embodiment of the optical reflector similar to Fig. 6; With

Fig. 8 is the view of another alternate embodiment of the optical reflector similar to Fig. 6.

The specific embodiment

In order to understand the present invention and other and in addition purpose, advantage and performance of the present invention better, hereinafter with reference to accompanying drawing and describe the present invention in conjunction with the embodiments.

With reference to accompanying drawing, as shown in Figure 1, lamp part 10 comprises in detail: have the supporting member 12 of base portion 14, this base portion is surrounded by inwall 16, and this inwall limits the chamber that has central axis 18.A plurality of LED (light emitting diode) 20 are bearing on the inwall 16 and rough alignment becomes to make light directive central axis 18; And central part 22 is positioned at around the central axis 18 and has first reflecting surface 24, and the shape of this first reflecting surface and position are specified to be convenient to tackle the light that receives from LED20 and to make the wide of this reception cause along the direction reflection that is parallel to central axis 18.Central part 22 is preferably reflection mirror cone.

Also comprised one or morely near the light guide 26 the LED20 separately by the lamp part 10 that claim 1 limited, each corresponding light guide 26 has makes the reflecting surface 28 of light directive central part 22.

Lamp part 10 comprises near one or more light guides 26 LED20 separately, and each corresponding light guide 26 has makes the reflecting surface 28 of light directive central part 22.Light guide 26 has printing opacity solid 27, and it has near the input of corresponding LED20 surface 30 and the output window 32 spaced with this input, and feasible light from LED20 and reflecting surface 28 is transmitted to first reflecting surface 24.

Light guide 26 can be independently a plurality of unit, and perhaps it can be arranged to single parts 50, and as shown in Figure 2, a plurality of unit can be co-molded to is convenient to make them to be assembled to simultaneously in the supporting member 12.

Output window 32 makes the light that receive from LED be sent to the outside along the direction 33 towards first reflecting surface, and this output window is provided with lens 34 so that make light assemble along the direction of first reflecting surface 24.

Now in particular with reference to Fig. 4, wherein show the alternative form of solid light guide, wherein each light guide 26 can be the reflector 36 of hollow, this reflector has near the feed opening 30a of corresponding LED20 so that receive light from LED, and it has inner reflection surface 28a so that light is directed to output window 32a so that directive first reflecting surface 24 from LED20.The reflector 36 of hollow can also be used for along make light directive outside towards the direction of lens 34, so that make light assemble along the direction of first reflecting surface 24.

Fig. 5 shows another embodiment, wherein LED can be installed on the base portion 14 and have the reflector of therewith installing 60, so that make the light that sends along 18 the first direction of paralleling to the axis along transverse axis to second direction directive central part 22, make light penetrate once more along 18 the direction 23 of paralleling to the axis at the central part place.Such system can allow the LED that uses side luminous.

Supporting member 12 comprises known thermal component, so that will be transmitted to the zone of leaving this lamp part from LED by the heat that LED produces.

In disclosed any or all forms of implementation, optical element 40 can be across the axial projecting direction of first reflector 22.This optical element can be optical fiber, lens, light pipe or guiding of other light or amplified medium.

In a preferred embodiment of the invention, LED20 is installed on the inner surface 42 of bearing part 44, and this bearing part can be a printed circuit board (PCB), and light guide 26 can roughly jointly form the reflector 50 that is assembled to slidably on the bearing part 44.As mentioned above, the aligning of its corresponding light guide of LED has been simplified in the use of reflector 50 significantly.

Also can be further improved by the external configuration of suitably selecting central part 22.For example, as shown in Figure 6, central part 22 can be the cone of standard.Perhaps, as shown in Figure 7, central part 22a can be the polygon cone, and perhaps, as shown in Figure 8, central part 22b can be the polygon cone of band knuckle-tooth shape side.

Therefore, the lamp part that provides a kind of LED of making to be applied to automotive applications and advantageously to be applied to other field.A plurality of LED can be multiple color or single color of planting, the multiple use that the optical element that the light that sends from LED can the various configurations of directive increases for use in quantity.The manufacturing of this lamp part is efficient and economical.Additional advantage is that the dispersion of LED distributes, and LED provides good heat radiating to make light be converged to a common light beam simultaneously.Heat abstractor can be arranged on the side, makes axial dimension less thus.

Although show and described the preferred embodiments of the present invention, be apparent that for the ordinary skill in the art, under the situation that does not break away from the scope of the present invention that limits by appended claim, can carry out various modifications and variations.

Claims

1. lamp part, it comprises:

Supporting member with base portion, this base portion is surrounded by inwall, and this inwall limits the chamber that has central axis;

A plurality of light emitting diodes, described light emitting diode are bearing on this inwall and rough alignment becomes to make this central axis of light directive; With

Central part with first reflecting surface, the shape of this first reflecting surface and position are specified to be convenient to tackle the light that receives from this light emitting diode and to make the wide of this reception cause along the direction reflection that is parallel to this axis.

2. lamp part as claimed in claim 1 is characterized in that, also comprises near one or more light guides corresponding light emitting diode, and each corresponding light guide has makes the reflecting surface of this central part of light directive.

3. lamp part as claimed in claim 2, it is characterized in that, this light guide has the printing opacity solid, it has close corresponding light emitting diode so that receive the input surface of light from this light emitting diode, and has the inner reflection surface of guiding light and make the light from light emitting diode and this inner reflection surface be transmitted to the output window of first reflecting surface.

4. lamp part as claimed in claim 3, it is characterized in that, the output window of this solid makes the light that receives from light emitting diode be sent to the outside along the direction towards first reflecting surface, and this output window is provided with lenticular unit so that make light assemble along the direction of first reflecting surface.

5. lamp part as claimed in claim 2, it is characterized in that, this light guide is the reflector of hollow, this reflector has near the feed opening of corresponding light emitting diode so that receive light from light emitting diode, and has the inner reflection surface of guiding light and make the light from light emitting diode and this inner reflection surface be transmitted to the output window of first reflecting surface.

6. lamp part as claimed in claim 5 is characterized in that, the reflector of this hollow can make light directive outside along the direction towards lens, so that make light assemble along the direction of first reflecting surface.

7. lamp part as claimed in claim 1 is characterized in that this supporting member comprises the thermal component that makes that heat conducts from light emitting diode.

8. lamp part as claimed in claim 1 is characterized in that, also comprises the optical element across the axial projection of this first reflector.

9. lamp part as claimed in claim 8 is characterized in that this optical element is an optical fiber.

10. lamp part as claimed in claim 8 is characterized in that this optical element is lens.

11. lamp part as claimed in claim 8 is characterized in that, this optical element is a light pipe.

12. lamp part as claimed in claim 1 is characterized in that, light emitting diode is installed on the inner surface of bearing part, and light guide roughly jointly forms the reflector that is assembled to slidably on the bearing part.

13. a lamp part, it comprises:

A plurality of light emitting diodes, described each light emitting diode is bearing on the supporting member, and roughly is arranged to annular around central axis, and is generally oriented to be parallel with this axis emission light; With

At least one has the reflector of reflecting surface, its position and orientation are specified to be convenient to tackle the light that one or more light emitting diodes send and to make this light transverse axis to reflexing to central part, this central part has first reflecting surface, and the shape of this first reflecting surface and position are specified to be convenient to tackle the light that receives from this light emitting diode and to make the wide of this reception cause along the direction reflection that is parallel to this axis.