Dimming unit, backlight module and display device

Abstract

The invention discloses a dimming unit, a backlight module and a display device. The dimming unit comprises a dimming body; a groove is arranged on the dimming body; a chamber for containing a light source is arranged on a first side wall of a groove; the light emergent port of the chamber faces a second side wall, opposite to the first side wall, of the groove, so the second side wall reflects light rays to the groove port of the groove. The backlight module comprises an optical film layer and a light source device arranged at one side of the light incident surface of the optical film layer; the light source device comprises the dimming unit; the light rays emitted from the dimming unit are emergent to the optical film layer; the display device comprises the backlight module. The light rays are restricted in the dimming body by using the groove, nearly no influence is generated to areas not corresponding to the groove port, and the crosstalk problem is effectively solved. The emergent light pattern of the dimming unit is rectangular, and the improvement of the picture uniformity of the display device can be effectively realized by limiting the brightness level of the light resource in the backlight module.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a dimming unit, a backlight module and a display device. Background technique [0002] The backlight module is one of the important components of the liquid crystal display. Since the liquid crystal itself does not emit light, the backlight module needs to supply sufficient brightness and evenly distributed light for the liquid crystal display, so that the liquid crystal display can display images normally. At present, the display technology of liquid crystal display has become mature, especially in the design of the backlight module. In addition to being used in liquid crystal display devices such as liquid crystal displays and liquid crystal televisions, backlight modules can also provide light sources for display devices such as digital photo frames, electronic paper, and mobile phones. [0003] The backlight module is divided into an edge-type backlight module and a direct-...

AI Technical Summary

Problems solved by technology

Ordinary direct-lit backlight modules mostly use closely arranged multiple LEDs or LEDs with lenses as light sources. The light from these two light sources propagates uncontrollably in the light mixing cavity of the backlight module, and often some of the light is directly or It spreads to other areas through reflection and affects the luminous effect; at the same time, whether it is a multi-LED arrangement scheme or a secondary lens scheme, the light projection is circular, and the projections of adjacent LEDs on the diffusion plate cannot be merged. Uneven brightness and darkness often appear, which greatly affects the product quality of the display

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