Backboard, backlight module and liquid crystal display

Abstract

Backboard possesses base and lateral margin connected to periphery of the base vertically so as to form a room for board of guiding light to be placed on. There is an opening on the lateral margin. Thus, after board of guiding light and backboard are assembled, positioning lug on periphery of the board of guiding light through the opening is bulged out of the lateral margin. End of lateral margin is bent at the opening so as to form outer corner, which is against the positioning lug on the board of guiding light. The backboard can lower local stress concentration cause by bearing the board of guiding light. Further, reliability of backlight module and liquid crystal display is improved.

Description

technical field [0001] The present invention relates to a backplane, and in particular to an invention applied to a backlight module and a backplane of a liquid crystal display. Background technique [0002] With the advancement of modern video technology, video devices are gradually trending toward light weight, large size, and thin panels. Flat Panel Displays developed in conjunction with optoelectronic and semiconductor manufacturing technologies, such as Liquid Crystal Displays (LCD), Organic Light Emitting Displays (OLED) or Plasma Displays (PDP), have gradually become the mainstream of display products. In recent years, most of the display screens on mobile phones, digital cameras, digital video cameras, notebook computers and desktop computers are based on liquid crystal display panels (LCD Panel). Therefore, a backlight module (Backlight Module) must be installed under the liquid crystal display panel to provide the surface light source required by the liquid crysta...

AI Technical Summary

Problems solved by technology

[0004] It should be noted that the above-mentioned positioning lug 120a of the light guide plate 120 and the positioning lug 140a of the optical film 140 are directly in contact with the inner edge of the opening 112a. Cutting produces an uneven burr 116 at the inner edge of the opening 112a

In this way, when the back plate 110 is impacted by an external force, it is easy to cause local stress concentration at the position where the positioning lug 120a of the light guide plate 120 (or the positioning lug 140a of the optical film 140) contacts the burr 116 on the inner edge of the opening 112a phenomenon, thus causing the positioning lug 120a (or positioning lug 140a) to be damaged or broken by stress

In addition, when assembling the light guide plate 120 or the optical film 140 on the backplane 110, the light guide plate 120 or the optical film 140 may be damaged due to contact with the burrs 116, resulting in a decrease in the assembly yield of the backlight module 100.

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