Backlight module and liquid crystal display device

Abstract

The invention provides a backlight module. The backlight module comprises a back plate, a buffering sleeve and a light guide plate, wherein a protruding column is arranged on the back plate, the buffering sleeve is provided with a first portion and a second portion, the first portion is provided with a first through-hole, the buffering sleeve is sleeved on the protruding column through the first through-hole, a first notch is arranged on the periphery of the light guide plate, the first notch is matched with the first portion to limit the light guide plate, and the second portion covers part of the area of the periphery, which is close to the first notch. According to the backlight module, the first notch of the light guide plate is filled by the first portion of the buffering sleeve, simultaneously, and the second portion of the buffering sleeve covers the part of the area of the periphery of the light guide plate, which is close to the first notch of the light guide plate, so that the contact area between the tip of the first notch and the buffering sleeve is large enough, the occurrence of the prismatic condensation phenomenon at the tip position is avoided, and light leakage of the backlight module is avoided.

Description

technical field [0001] The invention relates to a backlight module, in particular to a backlight module capable of preventing light leakage and a liquid crystal display device using the same. Background technique [0002] With the advancement of science and technology, the application field of liquid crystal displays is rapidly expanding due to the characteristics of lightness, thinness and power saving. However, because liquid crystal displays are non-self-illuminating display devices, a backlight module is required to generate display functions. [0003] like figure 1 shown, figure 1 It is a schematic diagram of the combination of the light guide plate and the back plate in the prior art. When assembling the light guide plate, in order to position the light guide plate on the back plate, four protruding columns 200 are arranged on the back plate 100 , and correspondingly arranged on the light guide plate 300 . There are four notches 400 . When the light guide plate 300 i...

AI Technical Summary

Problems solved by technology

[0005] When attaching the light-shielding tape 600, manual attachment is generally used. Because the attachment error cannot be avoided, the sticking of the light-shielding tape 600 is skewed; After dust is attached, its adhesive force will be greatly reduced, causing the light-shielding tape 600 to lift after being attached. Both of these situations will reduce the light-shielding effect and cause light leakage in the backlight module.

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