LED encapsulation structure and LED lamp
Technical field
The utility model relates to technical field of semiconductors, particularly relates to a kind of LED encapsulation structure and LED lamp.
Background technology
In recent years, along with the diversification of LED product application, the product demands such as high-power and TV backlight constantly increase, environment for use along with LED is also more and more severe, to the stability of LED and the requirement in useful life also more and more higher, be faced with the problem of brightness decay serious and silver coating blackening when traditional LED uses in the environment that some are hot and humid and outdoor.
Above-mentioned problem can be improved to a certain extent by improving encapsulation material, but also face the rising of Material Cost simultaneously.In recent years, many producers are had to start to research and develop the stability improving LED by improving the technique encapsulated.Have been reported; special coating is utilized to process the object to reaching anti-sulfuration to metallic reflector; but the method can only protect metallic reflector, and can not protect phosphor powder layer, the hydrone in air etc. still can enter in LED and react with fluorescent material.
Summary of the invention
For above-mentioned prior art present situation, the utility model provides a kind of LED encapsulation structure, solves fluorescent material in traditional LED Long-Time Service process and easily loses efficacy and the problem of the easy blackening of metallic reflector, improve the anti-curability of LED and extend LED useful life.
In order to solve the problems of the technologies described above, a kind of LED encapsulation structure provided by the utility model, comprising:
Metal base;
Reflector, described reflector is fixed on described metal base;
LED chip, described LED chip is fixed on the die bond face of described metal base, and is positioned at the bottom of the inner chamber of described reflector;
Fluorescent adhesive layer, described fluorescent adhesive layer to be filled in the inner chamber of described reflector and coated described LED chip;
Also comprise:
Organosilicone film layer, described organosilicone film layer covers on the surface of described fluorescent adhesive layer.
Wherein in an embodiment, described organosilicone film layer is by the mixture at described fluorescent adhesive layer surface coverage organosilicon and volatile solvent, and then baking is formed after described volatile solvent is volatilized.
Wherein in an embodiment, the thickness of described organosilicone film layer is 0.1 ~ 0.5mm.
Wherein in an embodiment, the inner chamber of described reflector becomes step shape, and it comprises:
Lower floor's inner chamber, described fluorescent adhesive layer is filled in described lower floor inner chamber; With
Upper strata inner chamber, described upper strata inner chamber is positioned at the top of described lower floor inner chamber, and the cross-sectional area of described upper strata inner chamber is greater than the cross-sectional area of described lower floor inner chamber, and described organosilicone film layer is arranged in the inner chamber of described upper strata.
Wherein in an embodiment, the angle between the inwall of described upper strata inner chamber and the die bond face of described metal base is 80 ~ 90 degree.
Wherein in an embodiment, the shape of cross section of described lower floor inner chamber and described upper strata inner chamber is circular or square.
A kind of LED lamp provided by the utility model, described light fixture comprises above-mentioned LED encapsulation structure.
Compared with prior art; the LED encapsulation structure that the utility model provides; due to the surface-coated organosilicone film layer at fluorescent adhesive layer; organosilicone film layer can not only play the effect of protection to metallic reflector; and can play phosphor powder layer and defend sulfide in environment for a long time; the effect of the contaminating erosion such as steam; the fluorescent material particularly easily made moist for silicate and fluoride etc. plays a very good protection; and high compactness organosilicon water white transparency; do not affect the reflectivity of LED, thus ensure the light extraction efficiency of LED and lasting brightness.
The beneficial effect that the utility model additional technical feature has will be described in this specification embodiment part.
Accompanying drawing explanation
Fig. 1 is the structural representation of the LED encapsulation structure in the utility model embodiment;
Fig. 2 is the structural representation before the volatile solvent volatilization of LED encapsulation structure in the utility model embodiment;
Fig. 3 is the sectional structure schematic diagram of the reflector of LED encapsulation structure in the utility model embodiment.
Description of reference numerals: 1, reflector; 11, the inner chamber of reflector; 11a, lower floor's inner chamber; 11b, upper strata inner chamber; 2, metal base; 3, LED chip; 4, fluorescent adhesive layer; 5, organosilicone film layer; 6, the mixture of machine silicon and volatile solvent.
Embodiment
And the utility model is described in detail below with reference to the accompanying drawings in conjunction with the embodiments.It should be noted that, when not conflicting, the feature in following embodiment and embodiment can combine mutually.
As shown in Figure 1, the LED encapsulation structure in one of them embodiment of the utility model comprises: metal base 2, reflector 1, LED chip 3, fluorescent adhesive layer 4 and organosilicone film layer 5, and wherein, described reflector 1 is fixed on described metal base 2; Described LED chip 3 is fixed on the die bond face of described metal base 2, and is positioned at the bottom of the inner chamber 11 of described reflector 1; Described fluorescent adhesive layer 4 to be filled in the inner chamber 11 of described reflector 1 and coated described LED chip 3; Described organosilicone film layer 5 covers on the surface of described fluorescent adhesive layer 4.
The LED encapsulation structure of the utility model embodiment; due to the surface-coated organosilicone film layer 5 at fluorescent adhesive layer 4; organosilicone film layer 5 can not only play the effect of protection to metallic reflector; and can play phosphor powder layer and defend sulfide in environment for a long time; the effect of the contaminating erosion such as steam; the fluorescent material particularly easily made moist for silicate and fluoride etc. plays a very good protection; and high compactness organosilicon water white transparency; do not affect the reflectivity of LED, thus ensure the light extraction efficiency of LED and lasting brightness.
As shown in Figure 2, more preferably, described organosilicone film layer 5 is by the mixture 6 at described fluorescent adhesive layer 4 surface coverage organosilicon and volatile solvent, then baking makes described volatile solvent, after property solvent evaporates to be evaporated, organosilicon under residual forms the film of one deck high compactness on fluorescent adhesive layer, and through overbaking, film is attached on the surface of fluorescent adhesive layer securely.Organosilicone film layer 5 covers described fluorescent adhesive layer 4 on the surface by which, has adhesive force large, the uniform advantage of thickness.Certainly, organosilicone film layer 5 can also adopt other modes to cover described fluorescent adhesive layer 4 on the surface.
More preferably, the thickness of described organosilicone film layer 5 is 0.1 ~ 0.5mm.
As shown in Figure 3, the inner chamber 11 one-tenth step shape of described reflector 1, it comprises lower floor inner chamber 11a and upper strata inner chamber 11b, and described fluorescent adhesive layer 4 is filled in described lower floor inner chamber 11a; Described upper strata inner chamber 11b is positioned at the top of described lower floor inner chamber 11a, and the cross-sectional area of described upper strata inner chamber 11b is greater than the cross-sectional area of described lower floor inner chamber 11a, and described organosilicone film layer 5 is arranged in described upper strata inner chamber 11b.Fluorescent adhesive layer 4 and organosilicone film layer 5 lay respectively in lower floor inner chamber 11a and upper strata inner chamber 11b, can realize fluorescent adhesive layer 4 and organosilicone film layer 5 does not interfere with each other, and are conducive to the evenness on surface simultaneously.
More preferably, angle between the inwall of described upper strata inner chamber 11b and the die bond face of described metal base 2 is 80 ~ 90 degree, like this, the inwall of upper strata inner chamber 11b is substantially vertical with the die bond face of metal base 2, mixture 6 natural subsidence of organosilicon and volatile solvent can be made, avoid the formation of step.
More preferably, the shape of cross section of described lower floor inner chamber 11a and described upper strata inner chamber 11b is circular or square.
In another embodiment of the utility model, provide a kind of LED lamp, described light fixture comprises the LED encapsulation structure in above-described embodiment.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.