A v-cut surface treatment process for side-adhesive light guide plates

Abstract

The invention discloses a V-cut surface treatment process of a lateral-inlet-glue light-guiding plate. Sand blasting is carried out on the surface of a light-guiding plate with a processed V-cut groove by means of sand blasting; and because the sand blasting particles play a role in impacting and cutting the surface of a V-cut blade, the pointed V-cut blade is changed into an arc one, so that injection molding materials flow at a constant speed to cause no vortex and thus generation of white spots or gas lines is avoided. Moreover, the sand blasting particles as nano-level plastic particles cause no scratch on the surface of the light-guiding plate. The V-cut surface treatment process with high adaptability is suitable for V-cut grooves with various shapes and structures; and a problem of white spot generation of the lateral-inlet-glue V-cut is solved. Moreover, the process is simple and the cost low.

Description

technical field [0001] The invention relates to the field of light guide plates, in particular to a V-cut surface treatment process for side-adhesive light guide plates. Background technique [0002] The V-cut groove is a kind of microstructure on the surface of the light guide plate, which is in the shape of a tiny sawtooth or semicircle. Its function is to increase the brightness of the backlight, improve the light energy utilization rate of the light guide plate, and increase the yield of the light guide plate. and concealment, so the current mid-to-high-end mobile phones use the V-cut process. As the ratio of the screen develops from 16:9 to 18:9 or even 20:9, the light guide plate is getting longer and thinner, and the conventional tail glue feeding method (that is, glue feeding from the short side of the light guide plate) It is difficult to form a light guide plate with a plate thickness of less than 0.35mm, unless a compression mold is used, but the compression mold...

AI Technical Summary

Problems solved by technology

As the ratio of the screen develops from 16:9 to 18:9 or even 20:9, the light guide plate is getting longer and thinner, and the conventional tail glue feeding method (that is, glue feeding from the short side of the light guide plate) It is difficult to form a light guide plate with a thickness of less than 0.35mm, unless a compression mold is used, but the compression mold is complex, the cost is very high, and it needs to be equipped with an injection molding machine with compression molding function, so it is not universally applicable

Therefore, the light guide plate with a mobile screen ratio of 18:9 generally adopts the method of side-feeding glue (that is, glue is fed from the long side of the light guide plate). The directions of the V-cut surfaces are perpendicular to each other, so it is easy to produce white spots and air marks on the V-cut surfaces

If there is no V-cut groove on the light guide plate or a very shallow V-cut groove (the depth of the V-cut groove is less than 1.5μm), generally there will be no white spots and air marks, but the brightness of the light guide plate is very limited, and If the V-cut groove is too shallow, the coverage and yield will be poor

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