CN107768504A - A kind of paster LED bracket - Google Patents

Abstract

The present invention discloses a kind of paster LED bracket, including reflector and base；Base sets positive pole and negative pole, LED chip to be mounted on base and be connected with positive pole and negative pole, and reflector is arranged on base, and LED chip is placed in the bottom of reflector；The reflector includes circumferentially eight reflectings surface of adjoining successively, and the angle between each reflecting surface and base is 130 degree 145 degree.The present invention can reduce light radiant flux loss, so as to improve the light extraction efficiency of LED chip.

Description

A patch LED bracket

technical field

The invention relates to the technical field of LED packaging, in particular to a patch LED bracket.

Background technique

LED (Light Emitting Diode) is a solid-state semiconductor device that can convert electrical energy into light energy. Advantages of long life and environmental protection.

In the prior art, the packaging of LED semiconductor devices mostly uses heat-conducting glue to fix the chip on the bracket, and then uses metal leads to conduct the chip to realize LED light emission. Since the bracket for fixing the LED chip is a crucial packaging material, the performance indicators of the bracket directly affect the performance of the packaged product and play a vital role in the performance of the chip, one of which is reflected in the light output of the packaged product Efficiency. Therefore, in order to improve the light output efficiency of the LED, the bracket must have a better light output effect.

However, in the prior art, there are deficiencies in the design of the chip bracket used for LED packaging: the design of the bracket initially considers the mechanical structure and processing technology, but there is not much research on the design of the light extraction efficiency, resulting in the existing bracket The angle between the reflective cup and the base is unreasonable, and the light output channel of the chip is too long, resulting in many unnecessary total reflections, resulting in the loss of light radiation flux, which leads to the loss of light flux of the packaged product.

In view of this, after in-depth research and testing, the present invention has developed a patch LED bracket that overcomes the above-mentioned defects, and this case arises from it.

Contents of the invention

The purpose of the present invention is to provide a patch LED bracket to reduce the loss of light radiation flux, thereby improving the light extraction efficiency of the LED chip.

In order to achieve the above object, the solution of the present invention is:

A patch LED bracket, comprising a reflective cup and a base; the base is provided with a positive pole and a negative pole, an LED chip is mounted on the base and connected to the positive pole and the negative pole, the reflective cup is disposed on the base, and the LED chip is placed at the bottom of the reflective cup; The reflective cup includes eight reflective surfaces adjacent in turn along the circumferential direction, and the included angle between each reflective surface and the base is 130°-145°.

Further, the reflective surface includes a first large reflective surface, a first small reflective surface, a first adjacent reflective surface adjacent to the first large reflective surface and the first small reflective surface, a second large reflective surface, adjoining the first small reflective surface and the first small reflective surface The second adjacent reflective surface of the two large reflective surfaces, the second small reflective surface, the third adjacent reflective surface adjacent to the second large reflective surface and the second small reflective surface, and the adjacent second small reflective surface and the first large reflective surface The fourth adjacent reflective surface is square as a whole, the reflection area of the first large reflective surface is equal to the reflective area of the second large reflective surface, the reflective area of the first small reflective surface is equal to the reflective area of the second small reflective surface, the first to the second The reflection areas of the four adjacent reflection surfaces are equal, and the reflection areas of the first and second large reflection surfaces are larger than those of the first and second small reflection surfaces, and the reflection areas of the first and second small reflection surfaces are larger than those of the first to second small reflection surfaces. The reflective area of the four adjacent reflective surfaces.

Further, the base is a metal base.

Further, the base is copper, copper alloy or aluminum alloy.

Further, an electroplating reflective layer is provided on the surface of the base on which the LED chip is installed.

Further, the electroplated reflective layer is a silver-plated layer or a silver-plated nickel-plated layer.

Further, the positive pole and the negative pole provided on the base are located in the same plane.

Further, the reflective surface is made of white plastic, ceramic or resin.

After adopting the above-mentioned solution, the reflective cup of the present invention includes eight reflective surfaces successively adjacent in the circumferential direction, and the included angle between each reflective surface and the base is 130°-145°, so that the light-emitting channel of the LED chip is relatively short, reducing The light output of the LED chip is totally reflected, and the spectral reflectance rate of 380-800nm is greater than or equal to 95%, thereby reducing the loss of light radiation flux and achieving the effect of increasing the luminous flux, thereby improving the light output efficiency of the LED chip.

Description of drawings

Fig. 1 is a top view of the present invention;

Fig. 2 is the sectional view of A-A among Fig. 1;

Fig. 3 is the sectional view of B-B among Fig. 1;

Fig. 4 is a schematic diagram of the light emitting principle of the present invention.

Label description

Reflector 1 Reflector 11

First large reflective surface 111 First small reflective surface 112

First adjacent reflective surface 113 Second large reflective surface 114

Second adjacent reflective surface 115 Second small reflective surface 116

Third adjacent reflective surface 117 Fourth adjacent reflective surface 118

Base 2 LED chip 3

Glue 4 Phosphor 5

Rays 6, 7, 8.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 1 to FIG. 4 , a patch LED bracket disclosed by the present invention includes a reflective cup 1 and a base 2 . The base 2 is provided with a positive pole and a negative pole. Preferably, the positive pole and the negative pole provided on the base 2 are located in the same plane, and the LED chip 3 is mounted on the base 2 and connected with the positive pole and the negative pole to realize LED light emission. The reflective cup 1 is arranged on the base 2. And the LED chip 3 is placed at the bottom of the reflective cup 1 .

The reflective cup 1 includes eight reflective surfaces 11 that are sequentially adjacent along the circumferential direction, and the angle between each reflective surface 11 and the base 2 is 130°-145°, so that the light exit channel of the LED chip 3 is relatively short, reducing the The light output of the LED chip 3 is totally reflected, and the spectral reflectance of 380-800nm is greater than or equal to 95%, thereby reducing the loss of light radiation flux, achieving the effect of increasing the luminous flux, thereby improving the light output efficiency of the LED chip 3 .

In this embodiment, the reflective surface 11 includes a first large reflective surface 111, a first small reflective surface 112, a first adjacent reflective surface 113 adjacent to the first large reflective surface 111 and the first small reflective surface 112, and a second large reflective surface. 114. The second adjacent reflective surface 115 adjacent to the first small reflective surface 112 and the second large reflective surface 114, the second small reflective surface 116, the third adjacent reflective surface adjacent to the second large reflective surface 114 and the second small reflective surface 116 Surface 117, and the fourth adjacent reflective surface 118 adjacent to the second small reflective surface 116 and the first large reflective surface 111, as shown in Figure 1, are square as a whole, and the reflection area of the first large reflective surface 111 is equal to the second large reflective surface 118. The reflection area of the surface 114, the reflection area of the first small reflection surface 112 is equal to the reflection area of the second small reflection surface 116, the reflection areas of the first to fourth adjacent reflection surfaces (113, 115, 117, 118) are equal, and 1. The reflection area of the second largest reflection surface (111, 114) is larger than the reflection area of the first and second small reflection surfaces (112, 116), and the reflection area of the first and second small reflection surfaces (112, 116) is larger than Reflecting areas of the first to fourth adjacent reflecting surfaces (113, 115, 117, 118).

As shown in Figure 2, the angle a between the second small reflecting surface 116 and the base 2 is 133 degrees, and the angle b between the third adjacent reflecting surface 117 and the base 2 is 145 degrees, as shown in Figure 3, The included angle c between the second large reflective surface 114 and the base 2 is 145 degrees, and the included angle d between the second adjacent reflective surface 115 and the base 2 is 139 degrees. The included angles between the eight emitting surfaces 11 and the base 2 may be set to be the same or different.

In this embodiment, the base 2 is a metal base, which is a good conductor of electricity and heat, and can be copper, copper alloy or aluminum alloy. An electroplating reflective layer is provided on the surface of the base 2 on which the LED chip 3 is installed, and the electroplating reflective layer can be a silver-plated layer or a silver-plated nickel-plated layer. The reflective surface 11 is made of white plastic, ceramic or resin.

As shown in Figure 4, the LED chip 3 is placed at the bottom of the reflective cup 1, and the glue 4 is encapsulated in the reflective cup 1. The glue 4 is mixed with phosphor powder 5, and the LED chip 3 emits light by exciting the phosphor powder 5, and the phosphor powder 5 is in all directions. glow. The refractive index n of glue 4 is 1.42-1.57, and there will be a total reflection angle from the optically dense medium to the optically sparse medium. When the refractive index n of glue 4 is 1.42, the total reflection angle is Arcsin (1/1.42), and the table corresponding The angle is 44.767 degrees. Similarly, when the refractive index n of the glue 4 is 1.57, the angle between each reflective surface 11 of the reflective cup 1 and the base 2 is 130-145 degrees, so that the light shown in Figure 4 6, 7, 8 can completely destroy the total reflection angle of the glue 4 through the cup wall of the reflective cup 1, and then make the light energy emitted by the fluorescent powder 5 to the cup wall of the reflective cup 1 go out directly, reducing the light path of the light.

The above descriptions are only preferred embodiments of the present invention, and are not limitations on the design of this case. All equivalent changes made according to the key points of the design of this case fall within the scope of protection of this case.

Claims (8)

1. A kind of 1. paster LED bracket, it is characterised in that：Including reflector and base；Base sets positive pole and negative pole, LED chip It is mounted on base and is connected with positive pole and negative pole, reflector is arranged on base, and LED chip is placed in the bottom of reflector；Institute Stating reflector includes circumferentially adjacent eight reflectings surface successively, and the angle between each reflecting surface and base be 130 degree- 145 degree.
2. A kind of 2. paster LED bracket as claimed in claim 1, it is characterised in that：Reflecting surface includes the first big reflecting surface, first Small reflecting surface, the first adjoining reflecting surface of adjacent first big reflecting surface and the first small reflecting surface, second largest reflecting surface, adjacent first Second adjoining reflecting surface of small reflecting surface and second largest reflecting surface, the second small reflecting surface, adjacent second largest reflecting surface and second are small 3rd adjoining reflecting surface of reflecting surface and the neighbours of adjacent second small reflecting surface and the first big reflecting surface connect reflecting surface, whole Body is square, and the reflective surface area of the first big reflecting surface is equal to the reflective surface area of second largest reflecting surface, the reflection of the first small reflecting surface Area is equal to the reflective surface area of the second small reflecting surface, and the reflective surface area of first to fourth adjoining reflecting surface is equal, and first, second The reflective surface area of big reflecting surface is more than the reflective surface area of first, second small reflecting surface, the reflective surface area of first, second small reflecting surface More than the reflective surface area of first to fourth adjoining reflecting surface.
3. A kind of 3. paster LED bracket as claimed in claim 1, it is characterised in that：Base is metab.
4. A kind of 4. paster LED bracket as claimed in claim 3, it is characterised in that：Base is that copper, the alloy of copper or aluminium close Gold.
5. A kind of 5. paster LED bracket as claimed in claim 1, it is characterised in that：The susceptor surface for installing LED chip sets electricity Plate reflector layer.
6. A kind of 6. paster LED bracket as claimed in claim 5, it is characterised in that：It is silver coating or nickel plating to electroplate reflector layer Upper silver layer.
7. A kind of 7. paster LED bracket as claimed in claim 1, it is characterised in that：The positive pole and negative pole that base is set are positioned at same In one plane.
8. A kind of 8. paster LED bracket as claimed in claim 1, it is characterised in that：The material of reflecting surface is white plastic, ceramics Or resin.