CN1752513A

CN1752513A - Led headlight

Info

Publication number: CN1752513A
Application number: CNA2005101089390A
Authority: CN
Inventors: C·M·库谢恩; T·特斯诺
Original assignee: Osram Sylvania Inc
Current assignee: Osram Sylvania Inc
Priority date: 2004-09-22
Filing date: 2005-09-22
Publication date: 2006-03-29

Abstract

A lamp (10) has a housing (12) with a base (14) with an internal circumferential wall (16) arranged about a longitudinal axis (18). A hollow body (20) projects from the housing (12) and is symmetrically arrayed about the longitudinal axis (18). A light guide (21) is positioned in the hollow body (20) and as a single output end (22) arrayed along the longitudinal axis (18) and has a plurality of radially extending arms (23), each of the arms having an input end (24). The light guide (21) is preferably constructed from a molded acrylic or a suitable glass having wave-guide characteristics.

Description

Led headlight

Technical field

The application requires in the priority of the temporary patent application No.60/612080 of submission on September 22nd, 2004.

The present invention relates to automobile headlamp, particularly, the present invention relates to use the headlight of light emitting diode (being abbreviated as LED hereinafter).More specifically, the present invention relates to use the headlight of a plurality of LED, but this a plurality of LED simulation points light source, thus allow this light source for example to can be used for projecting lens.

Background technology

Led light source is long and durable reliable because of its life-span, therefore wishes to use on automobile this light source.At present, the application of led light source is confined to as Brake lamp, taillight and interior light.The LED that emits white light that develops recently makes LED also can be used for headlight.For example, U.S. Patent No. 6406172 has proposed to adopt a plurality of redness, green and the blue-light-emitting LED of matrix form arrangement, and their light mixes and can send white light.Light output also can change by computer control, and can adapt to the change of direction by its applied vehicle.

Novel white-light LED adopts blue light and ultraviolet leds light source, and its fluorescent material with jaundice light combines, and makes the light of output be mixed into white light.

Though the LED of matrix form combination can provide various possibilities for headlighting, yet if the LED source that can reappear spot light can be provided, this will be a progress in the art so.

Summary of the invention

Therefore, an object of the present invention is to overcome the deficiencies in the prior art.

Another object of the present invention is to improve the headlighting of automobile.

But another object of the present invention provides a kind of LED lamp that has adopted a plurality of LED of simulation points light source.

From an aspect of of the present present invention, these purposes can realize that this lamp comprises the lampshade of being with base by a kind of like this lamp, and this base has the annular wall that is provided with around longitudinal axis; The ducted body that is provided with symmetrically around longitudinal axis that stretches out from base; Photoconductive tube, it has the single output that is provided with along longitudinal axis, and has a plurality of arm spares that radially extend, and each arm spare all has input; The similar a plurality of light emitting diodes that operationally are provided with respect to the arm spare that radially extends.In a preferred embodiment of the invention, light emitting diode is around the annular wall setting.

Description of drawings

Fig. 1 is the perspective view of an embodiment of lamp of the present invention;

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

Fig. 3 is the cutaway view of the line 3-3 in Fig. 2;

Fig. 4 is the enlarged drawing of the syndeton between LED and the optical light guide;

Fig. 5 is the perspective view of photoconductive tube;

Fig. 6 is the perspective view that embeds the optical waveguide in the lamp body;

Fig. 7 is the view sub-anatomy that is fixed on the LED on the flexible printed circuit board; With

Fig. 8 is provided in a side of the perspective view of the printed circuit board (PCB) that has LED in the lamp base.

The specific embodiment

In order to understand the present invention and other and further purpose, advantage and performance better, with reference now to the following discloses content and the claim that are described in conjunction with the accompanying drawings.

More specifically referring to accompanying drawing, shown lamp 10 among the figure now, lamp 10 comprises the lampshade 12 with base 14, and base 14 has the inner annular wall 16 that is provided with around longitudinal axis 18, and ducted body 20 stretches out from lampshade 12, and is provided with symmetrically around longitudinal axis.Photoconductive tube 21 is located in the ducted body 20, and has the single output 22 that is provided with along longitudinal axis 18, and has a plurality of arm spares 23 that radially extend, and each arm spare all has an input 24.Photoconductive tube 21 preferably is made of molded acrylic material or suitable glass with guide properties.

In a preferred embodiment, be provided with similar a plurality of light emitting diode 26 with respect to the arm spare 23 that radially extends operatedly, make that light that each light emitting diode 26 sent can be along sending with the luminous axis 30 of longitudinal axis 18 approximate vertical, and directly enter into the respective input 24 of one of them arm spare 23 separately or that be associated.Use middle junction condensation material or collector lens do not got rid of in term herein " directly ".

In a preferred embodiment of the invention, light emitting diode 26 is fixed on the flexible circuit board 28 that links to each other with annular wall 16, shown in partial enlarged drawing 4.LED26 also can be installed on the ring of arm spare 23 ends.This ring can slip in the lampshade and optical light guide in, optical light guide inserts to match with the corresponding input end of photoconductive tube arm spare with the paired mode of each LED.

Lamp 10 also comprises the fin 32 with light emitting diode 26 thermal couplings.Fin 32 can be used as the part of base 14, perhaps can be for being connected the optional feature on it.

Lampshade 12 comprises supply socket 34, and supply socket 34 includes the electric contact of distributing electric power being given light emitting diode by the joint on the printed circuit board (PCB) 28.

In one embodiment of the invention, base 14 has a plurality of fingers 38, and it is configured as and covers above ducted body 20 extends and form the flange 40 of lampshade 12 parts.This feature also sees the co-pending patent application S.N.10/838090 that submitted on May 3rd, 2004, and it transfers assignee of the present invention.

Therefore, the invention provides a kind of LED light lamp that has adopted its collective's light output can be focused into a plurality of light emitting diodes of single-point, so light output can be focused further by suitable lens and guide, being used for the front illumination of automobile headlamp.The axial length of this lamp is shortened, and LED scatter each other well so that improve heat radiation.The support ring of LED can more easily be made in advance, and can match apace with optical configuration.

Although this paper shows and described currently preferred embodiment of the present invention, yet it will be apparent to the person skilled in the art that under the prerequisite of the scope of the present invention that does not break away from claims and limited, can carry out variations and modifications this paper.

Claims

1. lamp, it comprises:

Lampshade with base, described base have the annular wall that is provided with around longitudinal axis;

The ducted body that is provided with symmetrically around described longitudinal axis that stretches out from described base;

Photoconductive tube, it has the single output that is provided with along described longitudinal axis, and has a plurality of arm spares that radially extend, and each described arm spare all has input; With

The similar a plurality of light emitting diodes that operationally are provided with respect to the described arm spare that radially extends.

2. lamp according to claim 1 is characterized in that, described light emitting diode is around described annular wall setting.

3. lamp according to claim 2 is characterized in that described light emitting diode is fixed on the flexible printed circuit board.

4. lamp according to claim 2 is characterized in that described light emitting diode has luminous axis, each described luminous axis and described longitudinal axis approximate vertical.

5. lamp according to claim 2 is characterized in that described base comprises the fin with described light emitting diode thermal coupling.

6. lamp according to claim 2 is characterized in that, described lampshade comprises the supply socket that is used for distributing electric power is given described light emitting diode.

7. photoconductive tube, it comprises:

The unitary body of light transferring material, it has along single output of longitudinal axis setting and has a plurality of arm spares that radially extend, and described arm spare leads to described single output, and each described arm spare all has input.