A kind of backlight module and display device

Abstract

The invention discloses a backlight module and a display device, since a microprism film layer is arranged on the light exit side of the light guide plate, and the microprism film layer is located on the light guide plate and extends a predetermined distance from the side close to the light source to the side far away from the light source within the range; the microprism film layer includes a plurality of first microprism structures, and the first microprism structures are used to enter the light guide plate from the first microprism structures when the light in the light guide plate enters the first microprism structures from the light guide plate When the light enters the first microprism structure, the incident angle at the first interface is larger than the exit angle at the first interface when the light exits the first microprism structure. Compared with not setting the microprism film layer, it is equivalent to reducing the reflection angle of the light at the first interface, so that the light path of the light exits is shortened, and the delay of the light light is reduced, so that the viewing angle and light exit angle of the backlight are not changed. Effectively improve the phenomenon that the side of the backlight module near the light source is too dark.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module and a display device. Background technique [0002] Directional backlights, due to their advantages in light output brightness viewing angle and adjustable front light brightness, have been more and more used in automotive high-brightness displays, laptop privacy displays, and VR high-brightness displays in recent years. [0003] There are two main ways to realize directional backlight: a reverse prism directional backlight module formed by a reverse prism + a matching light guide plate, and a grating directional backlight module that introduces a grating into a traditional backlight. Among them, the grating pointing type backlight module is generally used in conjunction with the liquid crystal panel to achieve naked-eye 3D display, but usually the number of viewpoints is limited; while the reverse prism pointing type backlight module is not limited by the num...

AI Technical Summary

Problems solved by technology

[0004] However, in the small-sized reverse prism pointing type backlight module, when the brightness of the backlight module and the uniformity of the backlight are optimal, there will be a phenomenon that the side of the light guide plate near the light source is darker.

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