Light-negative moulding set

Abstract

This invention supplies a back light module, which at least concludes one illuminant and one light guide plate. This light guide plate has a light-entry surface and a light-outward surface that next to the light-entry surface. This back light module also concludes at least a multireflection device that can make light beam emitted by the illuminant couple to beam path of light-entry surface. Through this reflection device, the angle of departure of illuminant is enlarged. This can slake the dark band that is generated when light enter into light guide plate. This can increase luminance of the back light module and make the structure simplify.

Description

【Technical field】 [0001] The invention relates to a backlight module. 【Background technique】 [0002] In recent years, flat panel display devices have developed rapidly and have been widely used in fields such as personal computers, televisions, mobile communications, and consumer electronics products, becoming a major platform for information technology. At the same time, the requirements of electronic products for backlight modules in flat-panel display devices (such as liquid crystal display devices) continue to increase, and high brightness, lightness, low cost, low energy consumption, and long life have become the development direction of backlight modules. [0003] According to the position of the light source, the backlight module can be divided into direct type and side type. The direct type refers to placing the light source directly under the light guide plate to directly illuminate the light guide plate. The disadvantage of this type of backlight module is that ...

AI Technical Summary

Problems solved by technology

Therefore, in the backlight module 10, when the light sources 11, 11' are incident on the light guide plate 12, there will be dark bands 124, 125 and 126 in the light guide plate 12, and since the entire light guide plate 12 is usually connected with the main body of a display panel The display area corresponds, so the dark band areas 124, 125 and 126 seriously affect the display brightness and quality of the display panel

[0005] In order to eliminate dark bands, a certain microstructure is usually formed on the light-incident surface or the light-exit surface in order to eliminate dark bands. However, in these methods, when the light source is incident on the light-incident surface, there are still dark bands. These microstructures can only reduce but cannot completely eliminate the generation of dark bands, and special design of these microstructures is required in the manufacture of light guide plates. These microstructures are formed by molds or other processes, which brings great difficulties to the actual production of light guide plates that require these microstructures, and increases the structural complexity of the entire backlight module.

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