CN202432390U

CN202432390U - LED (light emitting diode) automobile headlamp

Info

Publication number: CN202432390U
Application number: CN2011204616616U
Authority: CN
Inventors: 郑伟; 李萌萌; ***
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-17
Filing date: 2011-11-17
Publication date: 2012-09-12
Anticipated expiration: 2021-11-17

Abstract

The utility model discloses an LED (light emitting diode) automobile headlamp which comprises a reflective shell, wherein the reflective surface of the shell is an ellipsoid surface or one part of the ellipsoid surface; an LED luminous module is arranged near the focal point of the reflective surface; and the LED luminous module is arranged on a heat-dissipation base plate. The LED automobile headlamp is simple in structure and is easy to maintain and replace. Meanwhile, the ellipsoid surface shaped reflective surface and an LED surface light source are combined in the LED automobile headlamp, and the automobile headlamp with excellent light distribution is realized.

Description

The LED car headlamp

Technical field

The utility model relates to the automotive lighting field, is specifically related to a kind of LED car headlamp.

Background technology

Great power LED as lighting source have that volume is little, little power consumption, heating less, advantages such as response speed is fast, safe voltage is low, good weatherability, good directionality, so great power LED becomes the perfect light source in automotive lighting field.

At present, LED has obtained extensive use as the auxilliary lamp of automobile.All substituted other forms of light source at a lot of local LED such as indicator lamp, steering indicating light, brake lamp, fog lamp, taillights.But LED is also very immature as car headlamp, wherein has a major reason to be, the complex structure of LED car headlamp makes its maintenance and replacing become difficult at present.

The distribution curve flux of the distribution curve flux of LED and Halogen lamp LED and xenon lamp has very big-difference in addition, so LED needs special light path design as car headlamp, rather than simply applies mechanically the illumination path of existing Halogen lamp LED and xenon lamp.

Summary of the invention

To above two problems, the utility model provides a kind of LED car headlamp.

A kind of LED car headlamp that the utility model provides; Comprise reflective housing; The reflective surface of said reflective housing is the part of ellipsoid or ellipsoid, near the focus of said reflective surface, is provided with the LED illuminating module, and said LED illuminating module is arranged on the heat-radiating substrate.

Preferably, said LED illuminating module is an area source.

Preferably, said reflective surface is provided with diffuse reflective structure.

Preferably, said heat-radiating substrate is provided with fin or thermal column structure.

Preferably, the light direction of said LED illuminating module is provided with shadow shield.

Preferably, the light direction of said LED illuminating module is provided with lens.

The innovative point of the utility model have following some:

The first, adopt modular construction to make the installation of this LED car headlamp and become simple with maintenance.The LED car headlamp of the utility model includes only LED illuminating module, reflective housing and three agent structures of heat-radiating substrate, and which partly damages all only need be changed separately.

The second, the reflective surface of reflective housing is made into ellipsoid, then the led chip array is arranged near the focus of ellipsoid.The advantage of this scheme is, can realize good light distribution effect, and under the distant light irradiation, the input power of 50W can reach the maximal illumination about 300lx 25 meters distant places.Because for the LED area source of approximate lambert's body, ellipsoid has good spotlight effect, this conclusion is to obtain through a large amount of theoretical modelings and experiment contrast.

The utility model detects through luminous intensity distribution, and testing result has satisfied the requirement of " vapour automobile-used LED headlamp " national standard (draft for deliberation) to high beam.

Description of drawings

Fig. 1 is the sectional view of LED car headlamp in the utility model;

Fig. 2 is the vertical view of a kind of LED illuminating module in the utility model;

Fig. 3 is the vertical view of another kind of LED illuminating module in the utility model;

Fig. 4 is the vertical view of a kind of shadow shield in the utility model;

Fig. 5 is the vertical view of another kind of shadow shield in the utility model.

The specific embodiment

A kind of LED car headlamp; Schematic cross-section is with reference to figure 1; Comprise reflective housing 10; The reflective surface 101 of said reflective housing 10 is the part of ellipsoid or ellipsoid, near the focus of said reflective surface 101, is provided with LED illuminating module 11, and said LED illuminating module 11 is arranged on the heat-radiating substrate 12.

In the present embodiment, said LED illuminating module 11 is area sources, and its distribution curve flux is similar to the distribution curve flux of lambert's body.Fig. 2 has illustrated a kind of LED illuminating module, in row matrix, is periodically arranging green 21, red 22, blue 23LED chip, under this kind arrangement mode, is easy to realize serial or parallel connection between the same color led chip.Fig. 3 has illustrated another kind of LED illuminating module, in odd-numbered line and even number line, is periodically arranging green 21, red 22, blue 23LED chip respectively, and its characteristics are that the displacement of a chips is arranged between odd-numbered line and the even number line; The uniformity that helps light color at this kind arrangement mode.Certainly, said LED illuminating module also can add fluorescent material by the blue led chip array and forms.

In the present embodiment; The reflective surface 101 of the reflective housing 10 of said LED car headlamp is the ellipsoid of standard; As shown in Figure 1; The ellipsoid that said medial surface also can be made up of a lot of small planes, those skilled in the art is in the conventional simple distortion of being done on the basis of the utility model all in the protection domain at the utility model.

In the present embodiment, said LED illuminating module 11 is arranged near the focus of reflective surface 101 (ellipsoid), and the axis direction of the normal direction of the exiting surface of said LED illuminating module 11 and reflective surface 101 place ellipsoids is parallel to each other.Certainly, also can the normal direction of the exiting surface of said LED illuminating module 11 be arranged to the axis direction of reflective surface 101 place ellipsoids certain included angle is arranged.

In the present embodiment, said heat-radiating substrate 12 is provided with heat radiating fin structure 121 structures, is used for the contact area of diffusion heat substrate and air, helps metal shell to extraneous dissipate heat.Certainly, said heat radiating fin structure also can replace to the thermal column structure, and fin or thermal column structure can selectively be arranged on the heat-radiating substrate, does not all constitute the restriction to the utility model.

As further improvement, can be provided with slow emitting structural on the reflective surface 101 of said reflective housing 10 to present embodiment.Slow catoptric arrangement can be arranged on the raised or sunken striated structure of reflective surface 101 near opening part, also can be in the equally distributed frosted structure of medial surface.On the reflective surface 101 of reflective housing 10, slow catoptric arrangement is set, can reduces the dazzle of said LED car headlamp.

Further improvement as to present embodiment can be provided with shadow shield on the light direction of said LED illuminating module.Fig. 4 is a kind of profile of shadow shield, and Fig. 5 is the profile of another kind of shadow shield.Shadow shield is used for adjusting light spot shape and luminous flux, and its profile can design according to the actual requirements, is not limited to two kinds of shapes of Fig. 4, Fig. 5 signal.

Further improvement as to present embodiment can be provided with lens on the light direction of said LED illuminating module, and lens can be regulated the bright dipping light path of said LED car headlamp.

Claims

1. LED car headlamp; It is characterized in that: said LED car headlamp comprises reflective housing; The reflective surface of said reflective housing is the part of ellipsoid or ellipsoid; Near the focus of said reflective surface, be provided with the LED illuminating module, said LED illuminating module is arranged on the heat-radiating substrate.

2. LED car headlamp as claimed in claim 1 is characterized in that: said LED illuminating module is an area source.

3. LED car headlamp as claimed in claim 2 is characterized in that: said reflective surface is provided with diffuse reflective structure.

4. LED car headlamp as claimed in claim 3 is characterized in that: said heat-radiating substrate is provided with fin or thermal column structure.

5. like any described LED car headlamp of claim 1 to 4, it is characterized in that: the light direction of said LED illuminating module is provided with shadow shield.

6. like any described LED car headlamp of claim 1 to 4, it is characterized in that: the light direction of said LED illuminating module is provided with lens.