Backlight module and display device

Abstract

The embodiment of the present invention discloses a backlight module and a display device. The backlight module includes: a light guide plate and a point light source; the light guide plate includes a first part and a second part, and the first part includes a first light incident surface and a The first light-emitting surface intersecting with the first light-incident surface, the second part includes a second light-incident surface and a second light-emitting surface intersecting with the second light-incident surface, the first light-incident surface intersects with the second light-emitting surface, the first The light-emitting surface and the second light-incident surface are arranged opposite to each other, and the first light-emitting surface and the second light-emitting surface are both set as grating structures; the point light source is arranged at the first light-incident surface of the light guide plate, so that the light emitted by the point light source is the first light-emitting surface. The set angle enters the first part, and multiple total reflections occur in the first part. The reflected light passes through the first light-emitting surface and the second light-incident surface, enters the second part, and occurs multiple times in the second part. Reflected, and finally emitted from the second light-emitting surface. The embodiment of the present invention provides a backlight module suitable for holographic three-dimensional display.

Description

technical field [0001] Embodiments of the present invention relate to backlight module fabrication technology, and in particular, to a backlight module and a display device. Background technique [0002] Holographic 3D display is considered to be the best solution to realize 3D display because it can completely reproduce the depth information of the scene and realize true 3D display. At present, most of the systems that can realize dynamic holographic three-dimensional display rely on the spatial light modulator to load information on the incident light field, so as to realize the three-dimensional reproduction of the required display scene. [0003] As a holographic three-dimensional display, the light source required is different from that of the traditional two-dimensional display system. It needs to use a coherent light source to load information with the spatial light modulator. However, the light emitted by the backlight module in the traditional two-dimensional displ...

AI Technical Summary

Problems solved by technology

However, the light emitted by the backlight module in the traditional two-dimensional display system is incoherent light, which cannot be used by the spatial light modulator.

In addition, most of the existing coherent light sources are generated by lasers, and their output areas are generally very small, which is not suitable for occasions that require large-area light sources, and is also not suitable for holographic three-dimensional displays that require a high light-emitting area.

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