Backlight module and display device

Abstract

The embodiment of the invention discloses a backlight module and a display device. The backlight module comprises a light guide plate and a point light source; the light guide plate comprises a first part and a second part; the first part comprises a first light incidence surface and a first light-exiting surface which is intersected with the first light incidence surface; the second part comprises a second light incidence surface and a second light-exiting surface which is intersected with the second light incidence surface; the first light incidence surface is intersected with the second light-exiting surface; the first light-exiting surface and the second light-exiting surface are arranged oppositely; both the first light-exiting surface and the second light-exiting surface are of grating structures; the point light source is arranged at the first light incidence surface of the light guide plate, so that the light emitted from the point light source enters the first part at a first set angle, and is totally reflected repeatedly in the first part; the reflected light enters the second part through the first light-exiting surface and the second light-exiting surface, is totally reflected repeatedly in the second, and is finally emitted from the second light-exiting surface. The embodiment of the invention provides the backlight module which is applicable to 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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