CN2881963Y

CN2881963Y - LED support and device

Info

Publication number: CN2881963Y
Application number: CNU2005200344161U
Authority: CN
Inventors: 连伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-07
Filing date: 2005-06-07
Publication date: 2007-03-21
Anticipated expiration: 2015-06-07

Abstract

The utility model discloses a LED support, which comprises a support body with a concave middle part which is for supporting a LED core. The depth of the concave part is bigger than the height of the installed LED core, so that the top of the LED core is lower than the upper edge of the supporting body after the LED core is mounted in the concave part. The utility model provides a LED device with above mentioned support and the manufacturing way for the support. The utility model has the advantages that the depth of the concave of the supporting body is deepened, so that the top of the LED core is lower than the upper edge of the supporting body, therefore the light from the LED will be reflected by the inner wall of the concave and be furnished with better directionality, which will allow more light rays to emit along the opening of the concave, so as to reduce attenuation of light.

Description

Led support and device

[technical field]

The present invention relates to the LED encapsulation technology, specifically relate to a kind of led support and device.

[background technology]

In recent years, because the LED light-emitting diode is having development at full speed aspect the key technical indexes such as brightness, be widely used in the multiple occasion of Landscape Lighting, large scale display, and will have entered the general lighting field on a large scale.In the development activities of LED, the most most important also is the luminous intensity no more than LED of greatest concern, and the improvement of this respect at present concentrates in the exploration of LED luminescent material.And on the other hand, very important is, the encapsulation technology of LED can produce sizable role and influence equally to the final illumination effect that shows of LED product, that is to say, adopt same LED tube core and carry out the encapsulation of different structure form, the illumination effect possibility gap that obtains at last is very far away.The package design of LED is from simple 2 leaded packages such as early stage column type, pyramid type, straw hat types, experienced very great development to the structures such as Piranha type, PLCC type that are adapted to gradually than the great power LED tube core.Bringing into play the luminous power of LED tube core to greatest extent and reducing heat accumulation as much as possible is the unremitting pursuit of package designer all the time.

At present, although the encapsulating structure of LED is varied, generally speaking the LED tube core generally all is installed in a middle part and has on the supporter of depression, its schematic diagram as shown in Figure 1, A is the LED tube core among Fig. 1, B is a supporter.The cup depth of existing support generally all is slightly less than the height of the tube core of packing into or fair, and this structure makes light that the LED tube core sends exhale with wide-angle very.Owing to also have other encapsulating structure and interface around the supporter, generally speaking be only along the decay of the direction emergent ray of recessed openings minimum, said structure make a lot of light since aggregation relatively poor through around finally do not launch but become heat after repeatedly reflection, refraction and the absorption of material and be dissipated in the LED device.In addition, because the light that the LED tube core sends does not have directivity, it sends towards all directions, those transmit directions are not always to wish and can finally launch by the reflection of concave inner surface over against the light of recessed openings, and according to the mounting structure among Fig. 1, major part light is arranged, and particularly the light that sends near the part of bottom of LED tube core can't be launched by reflection repeatedly, and final the dissipation is heat.These defectives have not only reduced the illumination effect of LED, and steady operation and the life-span to LED is extremely harmful simultaneously.

On the other hand, Piranha type support is a kind of simple in structure and have the LED package support of better heat dissipation effect, often is used to the encapsulation of power-type LED.The general employing of existing Piranha support structure shown in Figure 2 comprises the cup-shaped supporter 1 that is positioned at the center and is positioned at its four pins 2 on every side.Because its supporter top surrounding area is narrow and small and have big space between the pin, the LED lamp can be seen bright hot spot in use on the circuit board below the supporter.This explanation has quite a few light not to be launched away, is heat but drained on the circuit board and finally dissipated, and promotes with respect to hard-won power of LED material and brightness, and this is very big waste.

[summary of the invention]

The technical problem to be solved in the present invention is to overcome above-mentioned shortcoming to provide a kind of light that can as far as possible the LED tube core be sent all to launch to strengthen the illumination effect of LED, reduces the led support and the device of photo-thermal conversion.

In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of led support, comprise the supporter that the middle part has depression, the concave bottom of described supporter is used to install the LED tube core, the degree of depth of described depression is greater than being used for the mounted LEDs die height, after making that the LED tube core is installed in the depression, its top is lower than the supporter upper edge.

Preferably, described supporter upper edge exceeds 0.1～1.0mm than the LED die top.Perhaps, according to the general thickness parameter of existing LED tube core, the degree of depth of described depression can be 0.3～1.2mm, and this degree of depth is 0.4～1.0mm more preferably.

Preferably, around being used to install the position of LED tube core, described concave bottom also have a circle to be lower than the groove of lower surface.

Preferably, described support is a Piranha type support.

Further preferably, the degree of depth of described groove is 0.1～1.0mm.

Further preferably, be provided with four pins around the supporter of described Piranha type support, the supporter top edge is extended to its pin place, forms a reflective surface.

Preferably, described reflective surface has the slightly high arc shape in edge.

For purpose of the present invention also provides, in encapsulating structure, adopt the LED device of above-mentioned any one led support.

Led support of the present invention can adopt such manufacture method, the step of depression is gone out at the middle part that is included in supporter, the concave bottom of described supporter is used to install the LED tube core, the degree of depth of the depression of going out is greater than being used for the mounted LEDs die height, after making that the LED tube core is installed in the depression, its top is lower than the supporter upper edge.

In the above-mentioned manufacture method, also can be included in described concave bottom and go out the step that a circle is lower than the groove of lower surface around being used to install the position of LED tube core.

Adopt technique scheme, beneficial technical effects of the present invention is: the degree of depth of 1) deepening the supporter depression, make LED tube core upper surface be lower than the supporter upper edge, the light that can make LED send has better directivity through the reflection of depression inwall, impel more rays along the outgoing of recessed openings direction, to reduce the decay of light.In fact, light is issued to reflection and the refraction that real arrival lighting space need pass through a plurality of interfaces such as epoxy resin layer, covering shell membrane from the LED tube core, what have also will be by being encapsulated in the small-sized optical lens in the device, therefore, the adjustment slightly of dispersion angle all may cause the variation significantly of boundary reflection refraction number of times, enhancing through the above-mentioned directivity that seems slight improvement and bring could improve the light efficiency of LED more than 10% unexpectedly! 2) around the concave bottom of supporter is used to install the position of LED tube core, the groove that a circle is lower than lower surface is set, not only increased the reflective area of concave inner surface, and the position of this groove is lower than lower surface, make the light that the LED tube core sends downwards, particularly the light that sends near the part of bottom of LED tube core can effectively be reflected away by the surface of groove, and the light efficiency about 5% of the raising LED that can (adopt identical LED tube core and identical outer enclosure structure) under the identical situation of other conditions behind the groove is set.The reduction that this just means the enhancing simultaneous heat accumulation of illumination effect has improved the performance and the degree of reliability of LED product greatly.3) the present invention preferably implements on Piranha type support, the supporter of the type support part is generally formed by the metal material punching out and has a bigger area, can carry out architecture advances provided by the present invention easily, in addition, because the type support is mainly used in encapsulation than great power LED, and after combining, the present invention can give play to good effect.4) employing the present invention is directed to the improvement that the Piranha support carries out, can effectively improve its " light leak " problem, make the light (promptly by the light of top package interface reflected back) that leaks down after extended supporter upper surface reflection, fully launched, improved light efficiency greatly.5) actual effect and technologic operability have been considered in depression that is provided and depth of groove parametric synthesis, make each support production unit can utilize existing equipment to carry out the manufacturing of product of the present invention and the enforcement of the inventive method, can either bring into play good reflecting effect and look after technologic ease for operation again, be very beneficial for the rapid popularization and the use of new technology of the present invention.

The present invention is described in further detail below in conjunction with the drawings and specific embodiments:

[description of drawings]

Fig. 1 is the supporting construction schematic diagram of existing led support.

Fig. 2 is existing Piranha type led support structural representation.

Fig. 3 is a kind of supporting construction schematic diagram of led support of the present invention.

Fig. 4 is the another kind of supporting construction schematic diagram of led support of the present invention.

Fig. 5 is a kind of Piranha supporting structure schematic diagram with reflective surface.

[embodiment]

The invention provides a kind of led support, its supporting construction has depression as shown in Figure 3 in the middle part of the supporter C, LED tube core D is installed in the bottom of described depression, the degree of depth of described depression is greater than being used for the mounted LEDs die height, make that the LED tube core is installed in the depression after, its top is lower than the supporter upper edge.Such structure, can be so that the light that the LED tube core sends has better directivity after the reflection of depression inwall, thereby reduce light decay, for making effect obvious, described supporter upper edge preferably exceeds more than the 0.1mm than the LED die top, but consider the actual conditions of existing support production equipment, should not exceed, otherwise existing equipment will be difficult to finish this punching out process above 1mm.Simultaneously, if it is dark to cave in, the order of reflection of light in depression is too much, also can bring unnecessary absorption and decay, causes the rising of tube core working temperature, and this is harmful to equally.

As the further improvement to said structure, the present invention also provides another kind of led support, and its supporting construction is compared with structure among Fig. 3 as shown in Figure 4, and its position of LED tube core D being installed in concave bottom also has a circle to be lower than the groove E of lower surface on every side.The setting of groove E can improve the probability that LED tube core emitted light is launched away greatly, thereby reduces the heat accumulation that the photo-thermal conversion reduces the LED device.Can form groove E by the mode of die stamping for the support that adopts metal support structure.Consider effect, the degree of depth of groove is preferably more than 0.1mm, but should not be greater than 1mm, otherwise existing equipment is difficult to finish this punching out process equally.

Above-mentioned two kinds of supporting constructions can be applied in various types of supports, particularly use to produce suitable obvious effects in the encapsulating structure of power-type LED.Generally in actual production also can plate reflective good film at the inner surface (comprising groove surfaces) of depression, for example silver-plated or aluminium etc. strengthen reflecting effect and improve luminous power.

For Piranha type support, the present invention also provides a kind of technical scheme of its " light leak " problem of solution especially, in conjunction with Fig. 5, as can be seen, an improvement of this scheme is the top edge of the supporter of traditional Piranha type support is extended to its pin place, forms a reflective surface 3.So, the light that led chip sends just can not drain on the circuit board via the space between supporter and the pin greatly in the back of being returned by the outer enclosure boundary reflection, but is reflected away again by supporter top extended " reflective surface ".This reflection process can repeated several times, and always most at every turn light sees through package interface and small part is reflected once more, and generally speaking, light efficiency can be highly improved.Make reflective surface have the slightly high arc shape in edge in order to improve the reflecting effect of reflective surface, to be more preferably, so more help concentrating of emergent ray.Piranha type led support among Fig. 5 is in conjunction with having adopted the depression in-depth and having extended the reflective surface structure, and its cup depth is 0.5mm, and it can improve light efficiency with respect to the existing Piranha type support among Fig. 1 and surpass 35%.

Claims

1, a kind of led support, comprise the supporter that the middle part has depression, the concave bottom of described supporter is used to install the LED tube core, it is characterized in that: the degree of depth of described depression is greater than being used for the mounted LEDs die height, after making that the LED tube core is installed in the depression, its top is lower than the supporter upper edge.

2, led support according to claim 1 is characterized in that: described supporter upper edge exceeds 0.1～1.0mm than the LED die top.

3, led support according to claim 1 is characterized in that: the degree of depth of described depression is 0.3～1.2mm.

4, led support according to claim 3 is characterized in that: the degree of depth of described depression is 0.4～1.0mm.

5, according to any described led support of claim 1～4, it is characterized in that: also have a circle to be lower than the groove of lower surface be used to install the position of LED tube core in described concave bottom around.

6, led support according to claim 5 is characterized in that: the degree of depth of described groove is 0.1～1.0mm.

7, according to any described led support of claim 1～4, it is characterized in that: described support is a Piranha type support.

8, led support according to claim 7 is characterized in that: be provided with four pins around the supporter of described Piranha type support, the supporter top edge is extended to its pin place, forms a reflective surface.

9, led support according to claim 8 is characterized in that: described reflective surface has the slightly high arc shape in edge.

10, a kind of LED device that in encapsulating structure, adopts above-mentioned any described led support of claim.