Light guide plate and side light type backlight module with light guide plate

Abstract

The invention discloses a light guide plate. The light guide plate comprises a light inlet surface, a light outlet surface, a reflecting surface and multiple side surfaces, wherein multiple microstructures are distributed on the reflecting surface, are recessed towards the light outlet surface, and are arranged in multiple rows in parallel; the multiple microstructures in each row are arranged at intervals in a first direction parallel to the light inlet surface; the distance of two points farthest from each other in the first direction of each microstructure is the length of the microstructure, and the distance of two points farthest from each other in a second direction perpendicular to the first direction of each microstructure is the width of the microstructure; in the same row, the widths of all the microstructures are the same, the gaps between adjacent microstructures are the same, and the lengths of the multiple microstructures are gradually increased from the middle to the two sides of the reflecting surface; the spans of the multiple rows of the microstructures are the same; and in the direction far from the light inlet surface, the widths of the microstructures in each row are gradually increased. The light guide plate has the advantage of uniform emitting brightness. The invention further provides a side light type backlight module with the light guide plate.

Description

technical field [0001] The invention relates to a light guide plate and a side-light backlight module using the light guide plate. Background technique [0002] Edge-lit backlight modules are widely used in many electronic products, such as liquid crystal displays and other electronic devices. A general edge-lit backlight module includes a light guide plate, a light source and a reflector. The light guide plate includes a light exit surface, a reflective surface opposite to the light exit surface, a light incident surface connected to the light exit surface, and multiple side surfaces. Multiple microstructures of the same size are uniformly distributed on the reflective surface. The light source is arranged opposite to the light incident surface, so that the light emitted by the light source enters the light guide plate from the light incident surface, is reflected by the microstructure of the reflective surface, and finally exits from the light exit surface. However, the...

AI Technical Summary

Problems solved by technology

However, the microstructures close to the light source can stagger and collect a large amount of light, while less light reaches the four corners of the light guide plate and the part far away from the light source, resulting in strong light near the light source and weak light at the part far away from the light source and the four corners, thus leading to The output brightness of the light emitting surface of the light panel is not uniform

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