Variable line structure light guide plate and optical module

Abstract

The invention provides a variable line structure light guide plate and a manufacturing method of the variable line structure light guide plate. The variable line structure light guide plate comprises an incident light surface (122), a first main surface (124) and a second main surface (126), the second main surface (126) is opposite to the first main surface (124), the incident light surface (122) is connected with the first main surface (124) and the second main surface (126), at least one of the first main surface (124) and the second main surface (126) is provided with a variable line structure (140), and the variable line structure comprises a plurality of variable lines distributed on the first main surface and / or the second main surface of the light guide plate in parallel. The invention further provides an optical module, the optical module comprises a light source, the variable line structure light guide plate, a diffusion plate and a reflection plate, and the variable line structure light guide plate and the optical module are used for the backlight module or an illumination lamp.

Description

technical field [0001] The invention relates to the field of optics, more specifically to a light guide element and an optical component. technical background [0002] Generally, the light guide plate used in the backlight module has a light incident surface, a light output surface and a reflective surface. The light provided by the light source enters the light guide plate from the light incident surface of the light guide plate, and exits from the light exit surface of the light guide plate. Another type of light guide plate used on a lamp has two opposite light exit surfaces, and the light provided by the light source enters the light guide plate and then exits from the two light exit surfaces respectively. In order to make the light passing through the inside of the light guide plate more evenly mixed, laser engraving, V-shaped cross grid engraving, and UV screen printing technology are usually used to engrave or print light guide points on the light guide plate. When ...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the limitation of printing plate-making precision, in the process of making small dots, the dots cannot be copied with high precision, resulting in the fact that the actual printed dots cannot match the preset design, resulting in obvious texture traces during the dot change process, which affects the appearance of the light guide plate

Therefore, the existing design process cannot satisfy the production of light guide plates with a light guide point diameter of less than 0.2mm, and cannot produce thinner light guide plates.

[0006] 2. Due to the cross-arranged dot structure design, it is easy to cause mesh collision interference during the plate-making process, forming a regular pattern, which has a great impact on the plate-making yield

[0007] 3. Due to the large dot shape and structure, the existing printed dot structure light guide plate needs to use 3 or more diffusion film structures to cover the dot shape in the practical application of the module, and the overall cost of the module is relatively high

[0008] 4. Due to the high requirements for dot restoration, in the actual printing process, poor dot printing will lead to a high defective rate of finished products

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