Backlight module capable of adjusting light field structure

Abstract

The present invention provides a backlight module capable of adjusting a light field structure, comprising a light source device, an optical structural layer, a first prism sheet, and a second prism sheet. The light source device has a light emergent surface, and the light emergent surface has a normal direction. The optical structural layer is arranged over the light emergent surface and has a plurality of micro-structures protruding towards the light emergent surface, wherein the micro-structures guide lights generated by the light emergent surface towards a direction deviated from the normal direction. The first prism sheet is arranged at the side of the optical structural layer back to the light source device and has a plurality of first prisms extending along a first direction, wherein the first prisms collect the lights deviated from the optical structural layer towards the normal direction on a cross section perpendicular to the first direction.

Description

technical field [0001] The invention relates to a backlight module with an adjustable light field structure; in particular, the invention relates to a backlight module with an adjustable light field structure that can improve light extraction efficiency and adjust the light field structure. Background technique [0002] With the development of science and technology, the practical application of displays in various fields can be seen everywhere in daily life. In actual situations, the display generates light through the backlight module to display images. For example, the backlight module includes an edge-lit backlight module and a direct-lit backlight module, and both of the above two backlight modules are light-emitting modules commonly used in current displays. [0003] For details, please refer to figure 1 , figure 1 It is a schematic diagram of light entering a prism in an existing backlight module. Such as figure 1 As shown, the existing backlight module uses the ...

AI Technical Summary

Problems solved by technology

However, in actual situations, the light 5A is emitted from the light-emitting surface 6A in a direction that deviates from the normal direction 7 and is larger than the viewing angle of 25 degrees, resulting in the loss of most of the light, which also has a negative impact on the light-emitting efficiency.

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