Display device and backlight module thereof

Abstract

The invention discloses a display device and a backlight module of the display device. The backlight module comprises a base plate, a frame, a light guide plate, a light source and a bent elastic piece. The frame is located at one side of the base plate to form a containing space. The light guide plate is arranged in the containing space and comprises a light inlet surface. The light source is arranged at one side of the light inlet surface in the containing space for emitting light towards the light inlet surface. One end of the bent elastic piece is connected with the base plate, and the other end extends into the containing space and elastically presses the light source to abut against the light inlet surface of the light guide plate. With the adoption of the invention, the distance between the side of the light guide plate and the light source is shortened so as to realize the perfect light emitting efficiency of the light guide plate and therefore, enough illuminating light is provided to the liquid crystal panel.

Description

technical field [0001] The invention relates to a backlight module, in particular to a backlight module used close to the light source on the side of the light guide plate. Background technique [0002] The Back Light Module is a key component of a Liquid Crystal Display (LCD). The backlight module supplies a light source with sufficient brightness and uniformity to enable the Liquid Crystal Panel to display images. Backlight modules can be roughly divided into side-light and direct-light designs according to the position of the light source. The side-light design of the backlight module is to install the light source on the side of the light guide plate, and then use the light guide plate to control the direction of the light beam, so as to provide uniform lighting for the LCD panel. light source. [0003] However, when assembling the light source to the light incident surface of the side of the light guide plate, if the light source is not close enough to the light incide...

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Problems solved by technology

[0003] However, when assembling the light source to the light incident surface of the side of the light guide plate, if the light source is not close enough to the light incident surface of the side of the light guide plate, an unexpected gap will be generated between the light source and the side of the light guide plate. The light extraction efficiency of the light beam provided by the light plate will decrease rapidly as the gap between the two increases.

[0004] In addition, due to environmental temperature changes, when the ambient temperature rises, the light guide plate will expand, and when the temperature drops, the light guide plate will shrink. After several times of thermal expansion and contraction, the position of the light guide plate will shift, and Change the gap between the light guide plate and the light source, thereby attenuating the light extraction efficiency of the light guide plate

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