Light guide plate, backlight module and display device

Abstract

The invention discloses a light guide plate, a backlight module group and a display device. The light guide plate comprises a near light end and a far light end, a number of screen dots are arranged on the light guide plate in a spaced manner, the screen dots are same in diameter, and distance between neighboring screen dots gradually decreases from the near light end to the far light end. The display device employing the light guide plate can be prevented from phenomena of visible screen dots, interference fringes and the like.

Description

technical field [0001] The invention relates to the technical field of liquid crystal television display, in particular to a light guide plate, a backlight module using the light guide plate, and a display device using the backlight module. Background technique [0002] At present, liquid crystal display devices, as display components of electronic equipment, have been widely used in various electronic products, and a backlight module is an important part of the liquid crystal display devices. Backlight modules are divided into side-type backlight modules and direct-type backlight modules according to the incident position of the light source. The direct-lit backlight module is to install a light source such as CCFL (Cold Cathode Fluorescent Lamp, cathode fluorescent lamp) or LED (Light Emitting Diode) behind the display panel, and convert the line light source of the light source into a surface light source for the display panel. The side-type backlight module is to insta...

AI Technical Summary

Problems solved by technology

[0003] But existing light guide plate is more regular because of dot arrangement design, and the diameter of dot increases gradually from near light end to far light end (referring to figure 1 ), resulting in an excessively large dot diameter at the far light end on the light guide plate

The light from the light source enters the light guide plate from the near light end. Because the dots on the light guide plate are arranged regularly, when the light is reflected and refracted by the regularly arranged dots to the light-emitting surface, a uniform surface light source cannot be formed, and interference fringes or rainbow patterns will easily appear on the display panel.

At the same time, the multiple reflections and refractions of the light by the dots at the near light end make only part of the light transmitted to the far light end, resulting in the weakening of the light at the far light end. When the light is reflected by the dots and refracted to the light-emitting surface again, it is almost impossible to form a surface light source, making the display panel visible dots, interference fringes or rainbow patterns.

[0004] Furthermore, the optical film in the existing backlight module usually adopts the traditional four, three or two films to form the optical film group, which makes the optical film group very thick and expensive; at the same time, the traditional laser 1. The dots of the light guide plate are made by the printing process, resulting in a larger diameter of the dots (the diameter range of the dots made by laser: 100 μm to 300 μm, the diameter range of the dots made by printing: 250 μm to 1000 μm), which also leads to the difference between the film structure and Technical problems such as dot visibility and interference fringes are prone to appear between display panels

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