CN2681354Y - A highly effective white light LED structure - Google Patents

Abstract

A high-efficiency white light LED structure, which relates to high-brightness white light emitting LED structure technology, the technology includes a lead frame, a packaging cavity with an opening and an LED package shell placed on the lead frame, an LED element located in the package cavity, and an LED The sealed phosphor layer and epoxy resin layer, and the lead-out wires connected to the LED element; a diffusion layer composed of diffusion powder is arranged between the LED element and the phosphor layer; the LED element, the diffusion powder layer, fluorescent powder layer and epoxy resin layer are sequentially arranged on the lead frame. The technology has simple structure and high brightness.

Description

A high-efficiency white LED structure

technical field

The utility model relates to an LED structure, in particular to a high-brightness white light-emitting LED structure.

Background technique

Light-emitting diodes are commonly used devices, with various colors, and are mostly used as indicating light-emitting devices. With the requirements of environmental protection and energy saving, people pay more and more attention to the use of high-efficiency light-emitting diodes, especially as lighting devices. Light-emitting diodes are even more important. The structure of the white light LED in the prior art is as follows: one kind of light mixes red, green and blue light into white light; Phosphor powder emits yellow light, using blue light and yellow light as complementary color light, the mixed light becomes high-brightness white light LED. Another method is to use ultraviolet light source to directly excite fluorescent materials to make them emit fluorescence, and then use this fluorescence to excite other fluorescent materials to make them emit fluorescence, and adjust the mixing ratio of the above-mentioned fluorescent materials to obtain white light. The above structures are relatively uneven when the phosphor powder is deposited on the LED packaging device, which leads to the phenomenon of variegated colors and apertures when the high-brightness blue LED excites the phosphor powder to form yellow light and then mixes the light into a high-brightness white LED. uniformity is not enough.

technical content

The purpose of the utility model is to design an LED structure which is simple in structure and can mix the light into high-brightness white light after the high-brightness blue LED excites the yellow light.

The purpose of this utility model can be realized through the following technical solutions,

A high-efficiency white light LED structure, comprising a lead frame, a package cavity provided with an opening and an LED package shell placed on the lead frame, an LED element arranged in the package cavity, a phosphor layer and an epoxy resin layer for sealing the LED , there is also a lead wire connected to the LED element; a diffusion layer composed of diffusion powder is provided between the LED element and the phosphor layer; the LED element, the diffusion powder layer, the phosphor layer, and the epoxy resin layer Set on the lead frame in turn.

The lead frame of the high-efficiency white light LED structure can be provided with an encapsulation shell, and the encapsulation shell is provided with an encapsulation cavity, and the LED element, the diffusion powder layer, the fluorescent powder layer and the epoxy resin layer are sequentially arranged in the encapsulation cavity.

In the structure of the high-efficiency white light LED, the encapsulation cavity provided in the encapsulation shell is cylindrical, square, trumpet-shaped or irregular.

The diffusion powder mentioned in the high-efficiency white LED structure is silicon dioxide or silicon oxide, and the diffusion powder layer and the phosphor layer are doped with each other. The formation method is to mix the fluorescent powder and the diffusing powder and let it stand. Due to the difference in specific gravity, a doped layered structure is naturally formed between the bottom of the diffusing powder, the top of the phosphor, and the middle.

In the high-efficiency white light LED structure, the lead-out wire connected to the LED is connected to the conductive sheet arranged outside the lead frame.

In the high-efficiency white LED structure, the conductive sheet is arranged on the bottom or side of the lead frame, and can be flatly attached to the outside of the lead frame, or can be perpendicular to the outside of the lead frame in the shape of a pin.

The technical progress of the utility model lies in that the structure is simple, the white light has uniform color and luster, and the brightness is high, and it can be used for lighting.

Description of drawings

Fig. 1 is a schematic structural diagram of the prior art;

Fig. 2 is a structural representation of the utility model;

Specific implementation method

A high-efficiency white LED structure, comprising a lead frame 8, a package cavity 30 with an opening and an LED package shell 3 placed on the lead frame, an LED element 1 arranged in the package cavity 30, and a phosphor layer for sealing the LED 7 and the epoxy resin layer 4 and the lead wire 6 connected with the LED element 1 . What is special is that a diffusion layer 5 composed of diffusion powder is provided between the LED element 1 and the phosphor layer 7 . The LED element 1, the diffusion powder layer 5, the fluorescent powder layer 7 and the epoxy resin layer 4 are arranged on the lead frame 1, and the luminous area is larger in this way.

The high-efficiency white light LED structure can also be that an encapsulation shell 3 is provided on the lead frame 8, and an encapsulation cavity 30 is arranged in the encapsulation shell, and the LED element 1, the diffusion powder layer 5, the phosphor layer 7 and the epoxy resin layer 4 are sequentially Set in the package cavity 30 . The package cavity can be a cylindrical structure, a trumpet-shaped structure, a square structure or any structure with an irregular shape. In order to facilitate insertion or crimping, the high-efficiency white light LED structure, the lead-out wire connected to the LED is connected to the conductive sheet 9 provided outside the lead frame. The conductive sheet is disposed on the bottom or side of the lead frame 8 .

Claims (9)

1. A high-efficiency white light LED structure, comprising a lead frame, a package cavity with an opening and an LED package shell placed on the lead frame, an LED element located in the package cavity, a phosphor layer for sealing the LED, and epoxy resin. Resin layer, also has the lead-out lead that connects with LED element; It is characterized in that, be provided with a layer of diffusion layer that is made up of diffusion powder between described LED element and phosphor layer; LED element, diffusion powder layer, phosphor layer , and the epoxy resin layer are sequentially arranged on the lead frame. 2. A high-efficiency white light LED structure according to claim 1, characterized in that an encapsulation shell is provided on the lead frame, and an encapsulation cavity is provided in the encapsulation shell, and the LED element, phosphor layer and epoxy resin layer are sequentially located in the package cavity. 3. A high-efficiency white light LED structure according to claim 1, characterized in that the diffusion powder layer and the phosphor layer disposed in the packaging cavity are doped with each other. 4. A high-efficiency white light LED structure according to claim 2, characterized in that, the package cavity provided in the package shell is a cylindrical or trumpet-shaped or square or irregular structure. 5. A high-efficiency white light LED structure according to claim 2, characterized in that, the diffusion powder layer provided in the packaging shell is silicon dioxide or silicon oxide. 6. A high-efficiency white light LED structure according to claim 1, characterized in that the lead-out wire connected to the LED is connected to the conductive sheet provided outside the lead frame. 7. A high-efficiency white LED structure according to claim 7, wherein the conductive sheet is arranged on the bottom or side of the lead frame. 8. A high-efficiency white light LED structure according to claim 7, wherein the conductive sheet arranged outside the lead frame is flatly attached to the outside of the lead frame. 9. A high-efficiency white light LED structure according to claim 7, characterized in that, the conductive sheet arranged on the outside of the lead frame is perpendicular to the outside of the lead frame and is pin-shaped.

Images