Patch type LED waterproof structure used for outdoor display screen

Abstract

A patch type LED waterproof structure used for an outdoor display screen is provided with a light-transmitting water shield approaching quadrate and a silica gel layer formed by silica gel in a pouring mode. Each two opposite faces of four shield walls of the water shield form a set, the inner side faces of a first set of shield walls are slopes, patch type LEDs are sleeved in the first set of shield walls in a tight-first-and-loose-afterward mode, and the bottoms of the inner side faces are in clearance fit with the covered patch type LEDs. The lower edges of the outer side faces of the first set of shield walls are outwards protrusive slopes which are clamping positions, fixing the water shield, of the patch type LED module mask, and the bottom edges of the protrusive slopes, namely the shield edges of the first set shield walls are attached to the surface of a PCB. The inner side faces and the outer side faces of a second set shield walls are all vertical planes, the inner side faces of the second set shield walls are in clearance fit with the shielded patch type LEDs, and clearance welding position discs are arranged on the inner side faces of the second set shield walls and used for containing LED pin bonding pads. The patch type LED waterproof structure used for the outdoor display screen is good in waterproof performance, simple in involved technologies, free of the need for special equipment, low in cost, easy and convenient to maintain or repair if a single LED is damaged, and particularly has generality.

Description

technical field [0001] The invention relates to a waterproof device, in particular to a waterproof structure of patch LEDs used for outdoor display screens. Background technique [0002] Outdoor display screens using SMD LEDs (Light Emitting Diode, abbreviated as LED), in view of the special structure of SMD LEDs, the surface requires good waterproof performance. The cost of existing SMD LEDs with waterproof function is too high, which is 2 to 3 times the cost of SMD LEDs without waterproof function. The waterproof method for a large number of SMD LEDs that do not have waterproof function mainly includes the overall coating of the Printed Circuit Board (PCB) module, and the design of a waterproof mask for the entire SMD LED display screen. The former involves complex technology, requires special equipment, and is costly, especially if a single SMD LED has a problem, it must be re-coated as a whole after repair, and maintenance or repair is complicated; while the latter is o...

AI Technical Summary

Problems solved by technology

The former involves complex technology, requires special equipment, and is costly, especially if a single SMD LED has a problem, it must be re-coated as a whole after repair, and maintenance or repair is complicated; while the latter is only suitable for SMD with a specific composition The waterproof treatment of the traditional LED display is not only costly and complicated to make, but also not universal.

Since the SMD LED waterproof technology is not yet perfect, it is difficult to meet the popular and practical requirements, and it cannot replace Dual In-line Package (DIP) devices, which greatly restricts the use of SMD LEDs outdoors. Display applications

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