A method to solve the hotspot problem of side-entry light guide plate

Abstract

The invention relates to a device and a method for solving the Hotspot problem of a side-inlet type light guide plate. The device for solving the Hotspot problem of the side-inlet type light guide plate comprises a laser transmitter, a beam expander, a reflecting mirror, a beam splitter and a focusing mirror, wherein the laser transmitter is used for transmitting laser, the diameter of the laser is expanded by the beam expander, then the laser is reflected to the beam splitter by the reflecting mirror, the laser is split into a plurality of beams of laser at preset spacing by the beam splitter, and finally, light beams are focused on the end surface of the light incident side of the light guide plate by the focusing mirror. According to the device and the method, the Hotspot problem of the side-inlet type light guide plate due to the increased spacing of lamp beads in the prior art is solved, and a V-CUT structure is processed on the end surface of the light incident side by utilizing laser, so that the divergence angle of light is increased, a uniform light film does not need to be additionally attached, the separate Hotspot solving network design according to different models is not needed, optical loss is low, the cost is saved, the production time can be greatly shortened, and the light outlet brightness is increased.

Description

technical field [0001] The invention relates to a device and a method for solving the Hotspot problem of a side-entry light guide plate. Background technique [0002] The main function of the side-type light guide plate is to convert the line light source originally composed of LED lamp beads into a surface light source, which is an important component in the side-type backlight. With the development of ultra-thin TVs, the demand for side-type light guide plates has increased rapidly, and problems have followed. The Hotspot phenomenon generally occurs when the AP value (the ratio of the distance from the light-incident end surface of the light guide plate to the LED lamp to the distance between the LED lamp beads) is less than 0.8. Contents of the invention [0003] The invention provides a device and method for solving the Hotspot problem of the side-entry light guide plate, which solves the Hotspot problem of the side-entry light guide plate caused by the increase in th...

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Problems solved by technology

[0003] The invention provides a device and method for solving the Hotspot problem of the side-entry light guide plate, which solves the Hotspot problem of the side-entry light guide plate caused by the increase in the distance between lamp beads, and uses laser processing V-CUT on the end surface of the light incident side Structure to increase the divergence angle of the light, thereby reducing or eliminating the Hotspot phenomenon, no need to attach additional uniform light film, and do not need to do a separate Hotspot outlet design according to different models, low light loss, cost saving, can greatly shorten Production time, improve the brightness of the light, the technical principles used are as follows:

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