Light guide plate and manufacturing method and forming mold of light guide plate

Abstract

The invention provides a light guide plate and a manufacturing method as well as a forming mold of the light guide plate, relating to the technical field of display. The light guide plate comprises at least one in-light plane, an out-light plane and a bottom plane, wherein the out-light plane and the bottom plane are oppositely arranged and are both connected with the in-light plane; a cavity is formed inside the light guide plate; the incident light from the in-light plane is radiated out from the out-light plane after being refracted and / or reflected by the cavity. With the adoption of the light guide plate, the light energy loss is reduced, the image brightness is improved, the production cost is reduced, and the competitiveness of a product is improved. The invention also provides a manufacturing method and a forming mold of the light guide plate; and the light guide plate is produced by using an injection molding or extrusion molding method and the corresponding forming mold.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a light guide plate, a manufacturing method thereof, and a molding die. Background technique [0002] In the existing liquid crystal display, the structure of the side-type backlight module 1 is as follows: figure 1 As shown, it includes a backplane 10 , a bottom reflection sheet 11 , dots 12 , a light guide plate 13 , a light source 14 , a diffusion sheet 15 , an optical film material 16 and a frame 17 . [0003] In the side-type backlight module 1, cold cathode fluorescent tubes or light-emitting diodes are used as the light source 14 to emit light from the side of the light guide plate 13. , so that a part of the light is emitted from the front of the light guide plate 13, and another part of the light reaches the surface of the bottom reflector 11 after being refracted, and enters the light guide plate 13 again after being reflected by the bottom reflector 11, and is also e...

AI Technical Summary

Problems solved by technology

[0004] Since the raw material of the light guide plate currently used in the liquid crystal display industry is mainly polymethyl methacrylate, the optical properties of this material are: the transmittance of light is 92%, and the refractive index is 1.49. Therefore, when a beam of light passes through When the light guide plate is emitted, 8% of the light energy will be absorbed by the light guide plate and lost, reducing the brightness of the screen

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