Edge occlusion-packaged light guide film and processing die and processing method thereof

Abstract

The invention discloses an edge occlusion-packaged light guide film and a processing die and a processing method thereof. The light guide film comprises a black-white double-side tape, a black-white film and a light guide base film arranged between the black-white double-side tape and the black-white film; the edge of the light guide base film is reduced by a distance L relative to the edge of the black-white double-side tape or the black-white film; the black-white double-side tape and the black-white film are occluded in the reduced area of the light guide base film, the occlusion width is B, and B is equal to half or three fourths of L. The section of the black-white double-side tape or the black-white film at the position of occlusion is of a Z-shaped structure. The processing die of the edge occlusion-packaged light guide film comprises a male die and a pressing die; the edge of the male die is raised; the middle of the male die is sunken; the raised inner edge of the male die has the same shape as the outline of the edge of the light guide film, and the size of the sunken area is greater than the size of the light guide base film and less than the size of the black-white double-side tape or the black-white film; when the processing die is used for processing the light guide film, the light guide film is positioned on the raised part of the male die, and the pressing die is heated and presses the whole light guide film for a certain period of time. The structure of the processing die is simple; the processing method is convenient to operate; the edge of the light guide film is fully and firmly occluded, and the lateral light leakage of the light guide film can be effectively prevented for a long time.

Description

technical field [0001] The invention relates to a light guide film, in particular to a light guide film for side-sealing packaging that prevents light leakage from the side of the light guide film, and a processing mold and processing method for the light guide film. Background technique [0002] The light guide film is an important part of the backlight module of the LCD screen and the keypad of the mobile phone. It is mainly used to guide the incident light of the LED lamp into the light guide film and change the light propagation path to destroy the total reflection condition of the light, and then perpendicular to the light guide The light-emitting surface of the film is emitted. The light leakage from the side of the light guide film affects the utilization rate of light and reduces the overall brightness of the light guide film. At present, the conventional way to prevent light leakage from the side of the light guide film is to use black and white double-sided adhesi...

AI Technical Summary

Problems solved by technology

This processing method requires a large shrinkage of the light guide film, resulting in a small area of ​​the available light guide area in the light guide film, which affects its light effect and causes the brightness of the display screen or key characters to be too dark

In order to avoid this problem, the conventional method is to reduce the inner shrinkage of the light guide film as much as possible, but after the shrinkage of the light guide film is reduced, the bonding area of ​​the black and white double-sided adhesive tape and the black and white film is further reduced, and the method of manual scraping is not enough. To avoid leaks in the side fit, or due to uneven force, some side fit firmly and some side fit weakly, and the area with low fit is easy to loosen after a long time of use, resulting in side light leakage

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