CN202442231U

CN202442231U - Led automobile headlamp light source

Info

Publication number: CN202442231U
Application number: CN2011204616207U
Authority: CN
Inventors: 郑伟; 李萌萌; 霍英东
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-17
Filing date: 2011-11-17
Publication date: 2012-09-19
Anticipated expiration: 2021-11-17

Abstract

The utility model discloses an LED automobile headlamp light source, comprising a metal shell which comprises an opening, an inner side surface, an outer side surface, an inner undersurface and an outer undersurface disposed opposite to the inner undersurface, wherein a cavity is formed by the opening, the inner side surface and the inner undersurface, the inner side surface is an ellipsoidal surface, a base plate is disposed adjacent to the focus of the inner side surface, LED chip arrays are disposed on the base plate, a transparent baffle is disposed at the opening and a transparent fluid is filled in the cavity. According to the LED automobile headlamp light source, double heat-dissipation channels are provided for the LED chips and heat dissipation limitation of the LED headlamp is effectively overcome. Meanwhile, an ellipsoidal reflective surface is combined with an LED surface light source and thus excellent light distribution for the automobile headlamp light source is realized.

Description

LED car headlamp light source

Technical field

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

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.Because there are the heat radiation bottleneck in high brightness, great power LED, make LED also very immature as the headlamp of headstock.If can break through this bottleneck, following automotive lighting field just will be the world of LED.

LED is the solid-state illumination light source, and the luminescence mechanism of its luminescence mechanism and other orthodox car lighting sources is different fully.The distribution curve flux of led chip also has very big-difference with the distribution curve flux of Halogen lamp LED and xenon lamp, so LED needs special light path design as the automotive lighting light source, rather than simply applies mechanically the illumination path of existing Halogen lamp LED and xenon lamp.

Summary of the invention

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

A kind of LED car headlamp light source that the utility model provides comprises metal shell, and said metal shell comprises opening, medial surface, lateral surface, inner bottom surface and the outer bottom that is oppositely arranged with said inner bottom surface; Said opening, medial surface, inner bottom surface form a cavity; Said medial surface is an ellipsoid, and the focus vicinity of said medial surface is provided with base plate, and said base plate is provided with the led chip array; Said opening part is provided with transparent baffle, is filled with light-transmissive fluid in the said cavity.

Preferably, the led chip in the said led chip array comprises in redness, green, blueness, the yellow led chip two kinds or two or more.

Preferably, said metal shell is provided with the pipeline that is in communication with the outside.

Preferably, said transparent baffle is lens.

Preferably, the lateral surface of said metal shell and outer bottom are provided with fin or thermal column structure.

Preferably, said metal shell medial surface is provided with reflectorized material.

Preferably, said metal shell medial surface is provided with diffuse reflective structure.

The utility model adopts the led chip array is placed on the base plate of high thermal conductance, base plate is placed in the metal shell filling liquid sealing above chip then again.The advantage and the innovative point of this scheme are, to led chip two heat dissipation channels are provided.On the one hand, the heat that chip produces passes to metal shell fast through the base plate of high heat conductance, and metal shell is delivered to heat in the air apace and goes then; The heat of chip generation passes to metal shell through the convection current of chip surrounding liquid on the other hand, and metal shell is delivered to heat in the air apace and goes then.

The utility model is arranged to ellipsoid with the medial surface of metal shell, 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 of the electricity of 65W can reach the maximal illumination about 4001x 25 meters distant places.Because for the LED area source of approximate lambert's body, ellipsoid has best spotlight effect, this conclusion is to obtain through a large amount of theoretical modelings and experiment contrast.

In addition, the led array in the utility model can be formed by multiple monochromatic chip portfolio, can realize the illumination of multicolour and colour temperature.Under the driving of different driving circuit, the utility model can be realized the switching of fog lamp, day portable lighter and night flight or navigation lamp.

Description of drawings

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

Fig. 2 is the stereogram of LED car headlamp light source in the utility model;

Fig. 3 is the side view of LED car headlamp light source in the utility model.

The specific embodiment

A kind of LED car headlamp light source; Sectional view, stereogram and side view comprise metal shell 10 respectively with reference to figure 1, Fig. 2 and Fig. 3, and said metal shell 10 comprises opening 101, medial surface 102, lateral surface 103, inner bottom surface 104 and the outer bottom 105 that is oppositely arranged with said inner bottom surface 104; Said opening 101, medial surface 102, inner bottom surface form a cavity; Said medial surface 102 is an ellipsoid, and the focus vicinity of said medial surface 102 is provided with base plate 11, and said base plate 11 is provided with led chip array 12; Said opening part is provided with transparent baffle 14, is filled with light-transmissive fluid 13 in the said cavity.

In the present embodiment, the led chip in the said led chip array 12 comprises in redness, green, blueness, the yellow led chip two kinds or two or more.For example; The led chip array can be arranged and formed by 8 red chip, 16 green chips, 8 blue chip; Also can form by 1 red chip, 2 green arrangements of chips; The kind of concrete led chip, quantity and spacing can be provided with as required, all within the protection domain of the utility model.

In the present embodiment; The profile of said LED car headlamp light source can design according to demand, and its profile can be designed as cylindrical like Fig. 2 signal, also can be designed as square column type; Also can be designed as multi-edge column-shaped, can also be designed to the polyhedron shape of other regular and irregulars.

In the present embodiment; The medial surface 102 of the metal shell 10 of said LED car headlamp light source 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 base plate is arranged near the focus of said medial surface 102, and the normal direction of base plate and medial surface are that the axis direction of ellipsoid is parallel to each other, and certainly, also can have certain included angle between said normal and the axis.Base plate can directly be placed on the inner bottom surface like what Fig. 1 illustrated, also can be fixed in the metal shell through support, does not all constitute the restriction to the utility model.

In the present embodiment, metal shell 10 is provided with the pipeline 15 like Fig. 1 signal, and pipeline 15 passes medial surface 102 and links to each other with air chamber 16 with lateral surface 103.Air chamber 16 is used to deposit the light-transmissive fluid 13 of expanded by heating.Certainly, pipeline 15 also can be arranged to pass inner bottom surface 104 and link to each other with air chamber 16 with outer bottom 105, all in the protection domain of the utility model.The riding position of air chamber 16 is unrestricted.

In the present embodiment, transparent baffle 14 is made into lens, and the material of transparent baffle can be quartz, glass or organic material.Transparent baffle is made into the bright dipping light path that lens can be regulated LED car headlamp light source.

In the present embodiment, metal shell 10 is provided with heat radiating fin structure 106 structures, is used for the contact area of enlarged metal housing 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 lateral surface or the outer bottom, all do not constitute the restriction to the utility model.

As further improvement, can be provided with reflectorized material on the medial surface 102 of said metal shell 10 to present embodiment.Reflectorized material is the material that visible light is had high reflectance, can be materials such as gold and silver, aluminium, and these materials can be through plated film, mode such as print, smear is deposited on the medial surface 102.On the medial surface of metal shell 10, reflectorized material is set, can improves the whole light extraction efficiency of LED car headlamp light source.

As further improvement, can be provided with casual emitting structural on the medial surface 102 of said metal shell 10 to present embodiment.Diffuse reflective structure can be arranged on the raised or sunken striated structure of medial surface 102 near opening 101 places, also can be in the equally distributed frosted structure of medial surface.On the medial surface of metal shell 10, diffuse reflective structure is set, can reduces the dazzle of said LED car headlamp light source.

As the further improvement to the utility model embodiment, light-transmissive fluid 13 can be a silicone oil.Silicone oil has advantages such as high chemical stability, high-flash, Nonpoisonous, non-environmental-pollution, low price, is a kind of good light-transmissive fluid.

The base plate 11 that being used in the utility model instance carried led chip array 12 can be a ceramic material, can be metal material, also can be the crystal material.One of preferred is aluminium nitride ceramics, and advantage has three: the relative crystalline material of price is cheap, and thermal conductivity coefficient is high, and thermal coefficient of expansion and led chip are approaching; Preferred two is aluminium oxide ceramics, and its advantage has two: cheap, its metallization process is very ripe; Preferred three is copper, and its great advantage is that thermal conductivity coefficient is high, can reach 400.The related backplate surface of the utility model has the pattern electrode that makes through technologies such as metal ceramic or ceramic metallizations, and this electrode is used for linking to each other with the positive and negative electrode of led chip.

Metal shell 10 in the utility model instance its role is to following 3 points: support base plate and led chip array 1.; 2. be led chip array high efficiency and heat radiation; 3. converge the light that the led chip array sends.Metal shell can be for material such as copper, aluminium or alloys, because copper and aluminium have higher relatively thermal conductivity coefficient.One of characteristics of metal shell in the utility model are that the medial surface of housing is designed to ellipsoid, and ellipsoid is pair similar with distribution curve flux to have good spotlight effect with led chip lambert's body; Two of its characteristics are that metal shell is provided with fin or thermal column structure, are used to increase the contact area of metal shell and air.In addition, in order to improve light extraction efficiency, can reflectorized material be set at the metal shell medial surface; For base plate and external drive circuit are coupled together, can be interspersed with lead on the said metal shell, perhaps be manufactured with pattern electrodes at the metal shell medial surface.

The light-transmissive fluid that relates in the utility model instance its role is to: when led chip was worked, the heat that its interface produced can conduct with heat through the convection current of liquid and be delivered on the metal shell fast.Because the metal shell in the utility model has very high thermal conductivity coefficient, so liquid transfer is given the heat of metal shell, can be very fast be diffused into the external world by metal shell.Light-transmissive fluid can be full of metal shell fully, also can not exclusively be full of metal shell.That light-transmissive fluid in the utility model need possess is non-conductive, viscosity coefficient is low, chemical stability good, characteristics such as corroding metal and led chip, nuisanceless, low price not; Be directed to this, we are low viscosity silicone preferably.Can effectively solve the heat radiation bottleneck that present LED car headlamp exists with the liquid heat radiation.

The transparent baffle that relates in the utility model instance its role is to: can be made into lens as the transparent baffle of light-emitting window and be used for adjusting angular, simultaneously anti-reflection film can be set on transparent baffle also and be used for improving light extraction efficiency.

The above is merely the embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.

Claims

1. LED car headlamp light source; It is characterized in that: said LED car headlamp light source comprises metal shell; Said metal shell comprises opening, medial surface, lateral surface, inner bottom surface and the outer bottom that is oppositely arranged with said inner bottom surface, and said opening, medial surface and inner bottom surface form a cavity, and said medial surface is an ellipsoid; The focus vicinity of said medial surface is provided with base plate; Said base plate is provided with the led chip array, and said opening part is provided with transparent baffle, is filled with light-transmissive fluid in the said cavity.

2. LED car headlamp light source as claimed in claim 1 is characterized in that: the led chip in the said led chip array comprises that two kinds in redness, green, blueness, the yellow led chip are perhaps two or more.

3. LED car headlamp light source as claimed in claim 2, it is characterized in that: said metal shell is provided with the pipeline that is in communication with the outside.

4. LED car headlamp light source as claimed in claim 3, it is characterized in that: said transparent baffle is lens.

5. LED car headlamp light source as claimed in claim 4 is characterized in that: the lateral surface of said metal shell and outer bottom are provided with fin or thermal column structure.

6. LED car headlamp light source as claimed in claim 5 is characterized in that: said metal shell medial surface is provided with reflectorized material.

7. LED car headlamp light source as claimed in claim 6 is characterized in that: said metal shell medial surface is provided with diffuse reflective structure.