Backlight module and liquid crystal display device

Abstract

The invention relates to the technical field of displaying, and discloses a backlight module and an LCD device. The backlight module comprises a light guide plate, an LED lamp and an outer frame used for assembling the light guide plate and the LED lamp. One side of the light guide plate is a light inlet surface which is opposite to the LED lamp in position. An elastic part which is in a compressed state is arranged between the side, opposite to the light inlet surface, of the light guide plate and the outer frame. The position, making contact with the elastic part, of the inner side of the outer frame is provided with a clamping groove which is used for installing the elastic part. According to the backlight module and the LCD device, the problem that the brightness of a backlight source is too low due to the fact that under existing technical conditions, the gap between the LED lamp and the light guide plate is overlarge is solved, high efficiency and high yield in the process of assembling the backlight source can be guaranteed, and meanwhile the phenomenon that in a reliability test (high temperature, high humidity and high and low temperature storage), the gap between the LED lamp and the light guide plate is enlarged due to thermal expansion and cold contraction of the light guide plate can be effectively avoided.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module and a liquid crystal display device. Background technique [0002] In the backlight assembly, there is a certain gap (ie Gap) between the light guide plate (LGP) and the LED lamp, which is an important factor affecting the brightness of the backlight. In the existing backlight module, generally There is a certain gap between the light guide plate and the LED lamp by providing buckles and other methods between the light guide plate and the LED lamp. However, the larger the gap between the LED lamp and the light guide plate, the smaller the luminous brightness of the backlight source. The experimental test data proves that when the gap between the LED lamp and the light guide plate reaches 0.5mm, the luminance of the backlight is only 50% of the theoretical luminance. [0003] At present, there are mainly two solutions to solve the problem of too large gap bet...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is how to avoid the problem that the brightness of the backlight source is too low due to the increase in the gap between the LED and the light guide plate caused by the deformation of the light guide plate during the use of the backlight module

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