Boe Technology Group Co., Ltd.

Beijing Boe Vision-electronic Technology Co., Ltd.

Shaoan Li

Changjia Fu

Zhishuai Jia

The present disclosure discloses a mold frame, a backlight module and a display device. The mold frame includes sidewalls for limiting a periphery of a light guide plate and optical films in the backlight module, and a boss for limiting the light guide plate and the optical films in a direction perpendicular to an output surface of the light guide plate. The boss is provide with a recess opening towards the light guide plate. The recess is provided with a number of rollers therein in a lengthwise direction thereof. A diameter of the rollers is greater than a depth of the recess. The mold frame is applied to the backlight module. In assembly, the light guide plate, the light source and the optical films are placed in the mold frame. An outside surface of the roller provided in the boss of the mold frame abuts against the light guide plate, limiting the light guide plate in the direction of the thickness of the backlight module, thereby preventing the light guide plate from warping upward after expansion due to heat. Hence, the mold frame according to the present disclosure may reduce occurrence of phenomena such a slow light incidence efficiency of the backlight module, light leakage of the backlight module and wrinkling of the optical films.

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Beijing, China

Shaoan Li