Improved light guiding structure, mold, composite light guiding structure and device

Abstract

The invention discloses an improved light guiding structure, which comprises a light guiding substrate. The light guiding substrate is provided with a first surface, a second surface and a light incident face, wherein the first surface and the second surface are back on to each other; the first surface is provided with a protrusion and / or a sunken structure; the protrusion and / or the sunken structure comprise first faces and second faces; the first faces are obliquely arranged circular or elliptical faces, the second faces are arc-shaped faces, the first faces intersect with the first surface,and the included angle theta formed between the first faces and the first surface is smaller than 90 degrees; and the second faces simultaneously intersect with the first faces and the first surface,and the included angle beta formed by intersecting of the second faces and the first surface is smaller than or equal to 90 degrees, wherein beta is large than theta. Through the improved light guiding structure, the light emitting face brightness of light guiding materials such as a light guiding plate and a light guiding film can be significantly improved. The invention further provides a mold,a backlight structure, a display device and the like based on the light guiding structure.

Description

technical field [0001] The invention relates to a light guide plate, in particular to an improved dot structure of the light guide plate, a high-brightness light guide plate, a backlight structure, etc., and belongs to the field of optical technology. Background technique [0002] At present, in some backlight modules, the light source is set on the edge of the back panel behind the liquid crystal panel. The light emitted by the light source enters the light guide plate from the light incident surface on one side of the light guide plate, and exits from the light output surface of the light guide plate after reflection and diffusion. , to form a surface light source for the liquid crystal panel. [0003] In order to increase the light uniformity and light intensity, dots are generally arranged on the bottom surface of the light guide plate (LGP), and the function of these dots is to change the propagation direction of the light. [0004] refer to Figure 1a-Figure 3b At pre...

AI Technical Summary

Problems solved by technology

But the dot structure of these existing light guide plates is limited to its shape, and it is diffuse type reflection to light (refer to Figure 4 ), so the front luminance of the light guide plate cannot be further improved

[0005] Although many researchers in the industry have proposed other types of light guide plate dot structures, their utilization rate of light is low. Therefore, it is necessary to add a variety of optical materials such as diffusers, composite films, reflectors, etc. to the backlight structure. Light guide plate fit (see Figure 5 ), but this undoubtedly increases the difficulty and cost of the process, and also leads to the complexity of the structure of the backlight structure, and the further increase in thickness, etc.

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