Welding structure for LED (light-emitting diode) array and circuit board thereof

Abstract

The invention provides a welding structure for an LED (light-emitting diode) array and a circuit board thereof. The welding structure comprises at least one welding hole, wherein the welding hole penetrates through a first surface and a second surface of the circuit board, the welding hole forms a first aperture on the first surface and forms a second aperture on the second surface, and the first aperture is smaller than the second aperture. According to the welding structure disclosed by the invention, the first aperture formed by the welding hole on the first surface of the circuit board is smaller than the second aperture formed on the second surface of the circuit board, so that the inner section of the welding hole is shaped like a trapezoid or the like, and when a power cord is inserted into the welding hole, the electrical connection between the power cord and the welding hole is more stable and more reliable in comparison with the surface-mounting connection way in the prior art. In addition, action force required for separating the power cord from a PCB (printed circuit board) can be increased by a soldering tin part and a sealing adhesive part on the inner section of the welding hole, so that the incidence of separating the power cord from the PCB can be reduced, and the working reliability of a backlight module can be enhanced.

Description

Technical field [0001] The invention relates to a welding structure, in particular to a welding structure for an LED array and its circuit board. Background technique [0002] The Back Light Module is one of the key components of the LCD panel. Since the liquid crystal itself does not emit light, the function of the backlight module is mainly to provide a light source with sufficient brightness and uniform distribution for the liquid crystal panel so that it can display images normally. Among them, the backlight can be a cold cathode fluorescent tube (CCFL, Cold Cathode Fluorescent Lamp), a hot cathode fluorescent tube, a light emitting diode (LED, Light Emitting Diode), etc. Compare LED backlight with CCFL backlight. Compared with traditional CCFL backlight, LED backlight has the characteristics of low power consumption, low heat generation, high brightness and long life span, and has gradually become the mainstream of the market. [0003] In the prior art, the LED backlight is ...

AI Technical Summary

Problems solved by technology

When the power line is at a certain angle to the PCB, it is easy to cause the pad to separate from the PCB board or the power line to detach from the pad, resulting in the failure of the PCB to be powered on, which in turn affects the work of the LED backlight of the backlight module.

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