Backlight unit and LCD (liquid crystal display) device

Abstract

The invention discloses a backlight unit and an LCD (liquid crystal display) device, relates to the technical field of LCD. The mounting reliability of a wedge-shaped light guide plate can be improved effectively, the thickness of the backlight unit can be further reduced, and lighting and thinning development of the LCD device can be realized. The backlight unit comprises the wedge-shaped light guide plate and a wedge-shaped back plate, wherein the wedge-shaped light guide plate comprises a light guide plate thick end, a light guide plate thin end as well as a light guide plate horizontal surface and a light guide plate inclined surface which are located between the light guide plate thick end and the light guide plate thin end; the wedge-shaped back plate comprises a back plate thick end, a back plate thin end as well as a back plate horizontal surface and a back plate inclined surface which are located between the back plate thick end and the back plate thin end; the light guide plate thick end is arranged at the back plate thin end, the light guide plate thin end is arranged at the back plate thick end, and the light guide plate inclined surface is attached to the back plate inclined surface. The backlight unit disclosed by the embodiment is applied to the LCD device.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a backlight module and a liquid crystal display device. Background technique [0002] A liquid crystal display device includes an LCD liquid crystal panel for displaying image content and a backlight module for providing a white light source to the LCD liquid crystal panel. According to the position of the light source relative to the LCD liquid crystal panel, the backlight module is mainly divided into side-light type and direct-light type. Among them, the edge-lit backlight module usually includes a light guide plate for guiding the light emitted by the light source to exit from a plane, and at the same time for improving the uniformity of the brightness of the backlight module. [0003] Among the existing light guide plates of liquid crystal display devices, the wedge-shaped light guide plate has a large light incident surface area, which can improve the light ...

AI Technical Summary

Problems solved by technology

refer to figure 1 As shown, a pillar 105 is arranged between the thin end of the wedge-shaped light guide plate 103 and the back plate 101. The pillar 105 ensures that the light-emitting surface of the wedge-shaped light guide plate 103 is a horizontal plane. The contact area between the pillar 105 and the wedge-shaped light guide plate 103 is small, causing the wedge-shaped light guide plate The installation of the light plate is not reliable, and it is prone to deformation, which leads to the inclination of the light-emitting surface of the wedge-shaped light guide plate, resulting in poor optical effect of the backlight module. At the same time, this kind of support structure makes the thickness of the backlight module relatively thick, which is not conducive to the development of light and thin liquid crystal display equipment.

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