Light element and preparation method, and its backlight mould set

Abstract

The invention relates to a light guide component and the preparing method thereof as well as a backlight module using it. And it comprises a light guide plate and a frame, where the light guide plate comprises an incident face, an outgoing face connected with the incident face, a reflecting face corresponding to the outgoing surface and three side faces beside the incident face, and the frame is integrated with the above three sides. And it is formed by double-color injection moulding technique, able to eliminate gap between light guide plate and frame, and thus reducing light energy losses and improving its boundary optical phenomenon. And the invention also provides a background module using it, which has advantages of low material costs, high assembling speed and high mechanical intensity.

Description

【Technical field】 [0001] The invention relates to a light guide element, its preparation method, and its backlight module. 【Background technique】 [0002] Liquid crystal displays with side-lighting backlight modules are widely used in fields such as notebook computers, vehicle displays, and mobile phones due to their small size, light weight, and uniform brightness. The backlight module is an optical mechanism that can convert scattered point light sources or line light sources into uniform planar light sources. Since the liquid crystal display is a non-luminous display device, a backlight module is required to produce a display function. The performance of the backlight module often directly affects the image quality of the liquid crystal display. Therefore, the backlight module becomes the most important component in the liquid crystal display. [0003] Such as figure 1 and figure 2 As shown, the backlight module 1 in the prior art includes a light guide plate 10, sev...

AI Technical Summary

Problems solved by technology

[0005] (1) Lamination design of reflective sheet: Paste a high-reflective patch on the joint between the light guide plate and the frame to reduce the loss of light energy, but often because the reflected light energy is not easy to control, there are still bright lines and dark lines on the boundary produce

In addition, the frame can also be made of highly reflective plastic material, which can also achieve the effect of reducing the loss of light energy, but it also produces bright and dark lines at the border

[0006] (2) Optical correction design at the edge of the light guide plate near the frame: mainly to increase or decrease the optical dot density at the edge of the reflective surface of the light guide plate to improve the optical problems of bright lines and dark lines at the boundary, but the assembly gap is often still Can cause optical and visual asymmetry

Or paste a low-reflection optical film on the edge of the exit surface of the light guide plate close to the frame for light reduction and shading, but this design will increase the assembly time and cost

[0007] (3) Diffusion sheet design: print patterns on the diffusion sheet to reduce the contrast between the brightness of the frame and the light guide plate. However, this design still has the disadvantage of light energy loss and increases the material cost of the backlight module.

[0008] To sum up, the existing backlight modules still cannot economically and effectively reduce optical defects such as bright and dark lines on the boundary between the light guide plate and the frame and light energy loss through the above-mentioned several technical means.

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