A kind of backlight module and display device

Abstract

The invention aims to provide a backlight module and a display device. The backlight module comprises a back plate, wherein the back plate is provided with a plurality of first through holes, a lamp bar, wherein the lamp bar is arranged at one side of a first surface of the back plate and is provided with a plurality of second through holes, a screw, wherein the screw is used for fixing the lamp strip on the first surface of the back plate and comprises a screw rod and a screw cap, the second end of the screw rod sequentially passes through the second through hole and the first through hole, and the inner diameter of the screw cap is larger than the inner diameter of the second through hole so that the screw cap is pressed on one side of the lamp strip far away from the back plate, a limiting structure used for keeping a gap between the screw cap and the first surface of the back plate is arranged between the screw cap and the back plate, and the height of the gap in the direction perpendicular to the first surface is greater than or equal to the thickness of the lamp strip in the direction perpendicular to the first surface; the limiting structure is positioned in the second through hole and arranged around the outer peripheral surface of the screw rod, and the outer diameter of the limiting structure is smaller than the inner diameter of the second through hole. The backlightmodule and the display device can reduce the problem of bright spots of the display picture caused by local expansion of the lamp bar in the backlight module.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a backlight module and a display device. Background technique [0002] With the rapid development of display technology and people's pursuit of thinner display products, major manufacturers have racked their brains to design thinner products in order to meet market demand. At the same time, in order to reduce the product cost, a direct-type backlight is adopted, but the direct-type backlight is too thick and has an unattractive shape. In order to solve this contradiction, major manufacturers have launched direct-type small OD (optical distance, light mixing distance) backlights (generally OD is 12-22mm) to meet market demand. [0003] However, for direct-type small OD backlights, the deformation of each component has a great impact on the image quality, and it is very sensitive, and a slight change will cause poor image quality. In particular, in the prior art, the LED light s...

AI Technical Summary

Problems solved by technology

[0003] However, for direct-type small OD backlights, the deformation of each component has a great impact on the image quality, and it is very sensitive, and a slight change will cause poor image quality

In particular, in the prior art, the LED light strips are tightly locked on the back panel by screws, and each light strip is locked with 4 screws. After the locking is in place, the light strips are completely locked. When used for a long time, heat will be generated, and the light bar will expand under high temperature conditions. The expansion of the screw locking position is blocked, and the light bar between the two screws will expand and arch, thereby shortening the light mixing distance of the LED, resulting in bright spots on the screen

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