Manufacturing method for small-spacing mask of outdoor LED display screen

Abstract

The invention provides a method for manufacturing a small-spacing mask of an outdoor LED (light-emitting diode) display screen, which comprises the following steps of: 1, selecting a mask manufacturing base material, using a polyphenylene sulfide polymer accounting for 70-80% of the total proportion of the base material, and using glass fiber accounting for 20-30% of the total proportion of the base material; 2, a base material is prepared by mixing a polyphenylene sulfide polymer and glass fibers according to a ratio of 8: 2 to 7: 3; step 3, when the polyphenylene sulfide polymer and the glass fiber are mixed and prepared, black masterbatch accounting for 0.2-0.5% of the total amount of the base material and an anti-ultraviolet agent accounting for 0.25% of the total amount of the base material are added; step 4, performing drying treatment on the mixed material in the step 3, and baking for 4-6 hours under the condition of 120-140 DEG C; and fifthly, the material treated in the fourth step is subjected to injection molding. The mask manufactured through the steps solves the problems that under high temperature and sunlight irradiation, the mask swells and deforms, the masks are blocked, and the contrast ratio is low.

Description

technical field [0001] The invention relates to the technical field of LED display screens, in particular to a method for manufacturing a small-pitch mask for an outdoor LED display screen. Background technique [0002] Early outdoor LED displays mostly used pixel pitches of 16mm, 10mm, and 8mm, and were mostly used in high-rises, squares, roads, and other areas suitable for long-distance viewing, such as outdoor advertisements, traffic information, etc. Being able to understand the displayed content is the basic goal. With the development of new application fields such as new infrastructure, smart transportation, and the Internet of Things, and the implementation of application scenarios, some outdoor scenes have begun to develop in the direction of spacing 4mm, 3mm, 2.6mm, etc., and outdoor high-definition, fine-quality images, Higher and more specific requirements such as IP65 protection level need to be applied to small-pitch outdoor LED displays. [0003] In practical...

AI Technical Summary

Problems solved by technology

However, there are no specific rules for the shape and thickness of the product in reality. There are local thickness differences, arc transitions and sharp corners coexist. If the product reaches the limit use conditions in actual use, it cannot meet the results under the standard test method.

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