Backlight module and display device

Abstract

The invention discloses a backlight module and a display device, wherein a microprism film layer is further arranged on the light emitting side of a light guide plate, and the microprism film layer islocated within the range that the light guide plate extends by a preset distance from the side close to a light source to the side away from the light source; the microprism film layer comprises a plurality of first microprism structures used for enabling an incident angle of light entering the first microprism structure at the first interface to be greater than an emergent angle of the light exiting from the first microprism structure at the first interface when the light in the light guide plate enters the light guide plate from the first microprism structure after entering the first microprism structure from the light guide plate. Compared with the condition that the microprism film layer is not arranged, the reflection angle of the light rays on the first interface is reduced equivalently, so that the emergent light path of the light rays is shortened, the light ray delay is reduced, and the phenomenon that the side, close to the light source, of the backlight module is dark is effectively improved on the basis that the backlight brightness visual angle and the emergent light angle are not changed.

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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