Illumination application circuit board with pins type LED

Abstract

The invention discloses a lighting application circuit board with a pin-type LED and comprises a circuit board (1) and a plurality of pin-type LEDs (2); the pins of the pin-type LEDs (2) are directlywelded on the board surface (1.1) of the circuit board (1) which is not provided with welded holes; the two pins and luminous bodies of the pin-type LED (2) are all parallel with the circuit board (1). The lighting application circuit board has the advantages that besides the advantages of good heat dissipation performance and less difficulty in subsequent heat dissipation treatment, the circuit board can further improve the heat dissipation effect and the brightness effect in lighting of LED by using a metal circuit board and the pin-type LED with higher power.

Description

Technical field: [0001] The invention relates to a lighting application circuit board with pin-type LEDs. Background technique: [0002] At present, the lighting application circuit boards with pin-type LEDs in the prior art usually adopt the following specific welding structure: the circuit board prepared with lines is provided with holes for inserting the pin-type LED pins, and the pin-type LED pins are perpendicular to the The direction of the circuit board is inserted into the hole, and then the LED is fixed and electrically connected to the circuit board by welding to form an LED lighting application circuit board. This welding structure of pin-type LEDs vertically welded on the circuit board has the following four defects: [0003] 1. Since the welding structure of the lighting application circuit board with plug-in LEDs in the prior art is formed by inserting the LED pins into the holes of the circuit board and then welding, resulting in a small contact area between t...

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Problems solved by technology

[0003] 1. Since the welding structure of the lighting application circuit board with plug-in LEDs in the prior art is formed by inserting the LED pins into the holes of the circuit board and then welding, resulting in a small contact area between the LED pins and the circuit board, The pin-type LED used for lighting is a kind of heat-generating electronic component, so the lighting application circuit board with the pin-type LED in the prior art causes the heat dissipation of the LED to be not ideal enough;

[0004] 2. In the prior art, after the lighting application circuit board with pin-type LED is manufactured, it generally needs to be subjected to a certain follow-up heat dissipation treatment. The conventional method is to first coat a layer of heat-conducting insulating glue on the back of the circuit board. Then attach a metal plate (metal layer) that can dissipate heat. However, since the pins behind the circuit board are connected to circuits with signals and positive and negative electrodes, the metal plate that dissipates heat has good electrical conductivity. Performance, so, when the lighting application circuit board with pin type LED in the prior art is performing subsequent heat dissipation treatment, it is necessary to consider reasons such as short circuit and thermal conductivity of the heat-conducting insulating glue, that is, when the heat-conducting insulating glue is applied too When the thickness is thin, the circuit board is prone to short circuit, and when the heat-conducting insulating glue is applied too thickly, the heat-conducting performance of the heat-conducting insulating glue becomes larger and its thermal conductivity is greatly reduced, resulting in the existing technology with pin-type LEDs. The subsequent heat dissipation of the lighting application circuit board is very difficult;

[0005] 3. At present, conventional metal circuit boards generally include a conductive layer, a heat-conducting insulating layer, and a metal base layer. Although such metal circuit boards such as PCB aluminum substrates are widely used in the LED industry because they are easy to deal with heat dissipation problems, however, LEDs with pins However, the lighting application circuit board cannot use this metal circuit board to solder LEDs to solve the heat dissipation problem. The reason is that the metal circuit board is not allowed to have welding holes, otherwise it will cause circuit damage due to the conduction between the conductive layer and the metal base layer. Board short circuit, because the lighting application circuit board with pin-type LEDs in the prior art cannot use metal circuit boards, the lighting application circuit board with pin-type LEDs in the prior art causes the heat dissipation of the LEDs is not ideal;

[0006] 4. Just because the lighting application circuit boards with pin-type LEDs have the above-mentioned many bad heat dissipation problems, therefore, generally only lower power (generally lower than 1W) pin-type LED, resulting in insufficient brightness from the pin-type LED

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