CN103855290A - White light LED light source structure - Google Patents

Abstract

The invention relates to a white LED light source structure; it includes a light source assembly (16) arranged in a reflective cup (10), the upper part of the light source assembly (16) is provided with a crystal bonding plate (5), and the lower part is provided with a fixing card Seat (13), outer pin (11), (12) is arranged at the bottom; Several LED chips ( 8); the top circle of the reflective cup (10) is connected to the transparent glass sheet (3), and the transparent glass sheet (3) is covered with a light-transmitting cover (1); the outer surface of the transparent glass sheet (3) is provided with a fluorescent powder layer (2); each A transparent protective adhesive layer (4) is arranged on the surface of each LED chip (8); a specular reflective layer (9) is arranged on the inner wall of the reflective cup (10); the present invention changes the traditional white light LED packaging structure, and greatly reduces the cost of LED packaging. The process is difficult, and the light extraction efficiency of the white LED is improved.

Description

A white light LED light source structure

technical field

The invention relates to a white LED light source structure.

Background technique

LED, as a kind of novel light-emitting device, is recognized by the whole world gradually. With the large-scale application of LEDs in various fields, especially the gradual promotion of LED lighting applications, the LED grain technology is changing with each passing day, but the LED packaging technology has not made much progress. The current white LED patent - the blue LED chip excitation yellow phosphor technology is mainly Master international companies in Japan and Asia. With the gradual promotion of LEDs in the lighting field, more and more attention has been paid to LED packaging methods for high light efficiency.

Contents of the invention

The purpose of the present invention is to provide a white LED light source structure with high light extraction efficiency.

It includes a light source assembly (16) arranged in the reflector (10); the upper part of the light source assembly (16) is provided with a die-bonding plate (5), the lower part is provided with a fixed card holder (13), and the bottom part is provided with an outer pin (11) , (12); several LED wafers (8) bonded and fixed by bonding wires (6) connected to transparent adhesive glue (7) are arranged on the solid crystal plate (5); sheet (3), transparent glass sheet (3) outer cover translucent cover (1).

A fluorescent powder layer (2) is arranged on the outer surface of the transparent glass sheet (3).

A transparent protective glue layer (4) is arranged on the surface of each LED chip (8).

A specular reflective layer (9) is arranged on the inner wall of the reflective cup (10).

The invention changes the traditional packaging structure of the white light LED, greatly reduces the process difficulty of LED packaging, and improves the light extraction efficiency of the white light LED.

Description of drawings:

Accompanying drawing 1 is the front view of the original color light source assembly of the present invention;

Accompanying drawing 2 is the top view of the natural color light source assembly of the present invention;

Accompanying drawing 3 is the front sectional view of the curved surface reflective cup of the present invention;

Accompanying drawing 4 is the front sectional view of finished product of the present invention before adding light-transmitting cover;

Accompanying drawing 5 is the front view of finished product of the present invention;

Accompanying drawing 6 is the bottom view of finished product of the present invention;

Figure 7 is a schematic diagram of the light conversion path of the white LED light source of the present invention.

Detailed ways:

Adopt transparent solid material as the solid crystal board (5), put the outer pins (11) and (12) of the light source into the light source assembly (16) and assemble the fixing bracket (13), then put the outer pins (11) and (12) of the light source (12) Paste it on the corresponding position of the transparent die-bonding board (5). The transparent LED chip (8) is fixed on the corresponding position of the transparent crystal-bonding plate (5) with transparent adhesive glue (7). The corresponding electrodes of the chip are connected with bonding wires (6), and connected with the pads on the external pins (11) and (12) of the light source. Then apply a layer of transparent protective adhesive layer (4) on the surface of the chip with the wires connected to prevent the bonding wires (6) from collapsing. In this way, the natural color light source assembly is manufactured. Make reflective cup (10) with metal or plastic material, and spray high-reflectivity specular reflective layer (9) on reflective cup (10) inner surface; (13) touches the bottom of the reflector (10). Then cover a piece of transparent glass (3) on the top of the curved surface reflector, and then coat a layer of phosphor layer (2) on the surface of the glass, the phosphor layer (2) can be a prefabricated phosphor, or can be sprayed immediately . In this way, the production of the white LED light source is completed. Finally, various light-transmitting covers (1) can be covered on the surface of the light source as required to achieve the desired optical shape.

Lighting principle introduction:

The LED chip (8) is a transparent body, and the LED chip (8) is fixed on the transparent crystal-bonding plate (5) by a transparent adhesive (7). After directly passing through the transparent glass sheet (3), it irradiates on the fluorescent sheet, and then emits white light from the surface of the fluorescent sheet; the other part passes through the transparent glass sheet (3) after being mirror-reflected by the reflective cup (10), irradiates the fluorescent sheet and It is converted into white light and emitted. The schematic diagram of light path conversion is shown in Figure 7. The light (14) emitted by the LED chip is the light emitted by the LED chip (8), and the white light (15) is emitted by the LED chip (8) after the natural color light is converted by phosphor powder The natural color light is converted into white light by the fluorescent sheet.

Claims (4)

1. a white LED light source structure, it is included in the light source assembly (16) arranging in reflector (10), it is characterized in that: the top of light source assembly (16) arranges die bond plate (5), bottom arranges Fixing clamp-seat (13), and bottom arranges outer pin (11), (12); Several are set on die bond plate (5) and connect by bonding line (6) the LED wafer (8) that transparent bonded adhesives (7) is adhesively fixed; Reflector (10) top circle connects transparent glass sheet (3), transparent glass sheet (3) outer cover diffuser (1).

2. a kind of white LED light source structure as claimed in claim 1, is characterized in that: the outer surface of transparent glass sheet (3) arranges phosphor powder layer (2).

3. profit requires a kind of white LED light source structure described in 1, it is characterized in that: the surface of each LED wafer (8) arranges transparency protected glue-line (4).

4. a kind of white LED light source structure as claimed in claim 1, is characterized in that: specular layer (9) is set on the inwall of reflector (10).

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