Backlight module and liquid crystal display device comprising same

Abstract

The invention belongs to the field of liquid crystal display, and particularly relates to a backlight module and a liquid crystal display device comprising the same. The backlight module comprises a middle frame, a light guide plate and a light source, and is characterized by further comprising a shielding structure, the shielding structure prevents light of the light source from directly emitting out from a gap between the middle frame and the light guide plate and comprises a groove and a convex lug, the groove is arranged on the middle frame, and the convex lug is disposed on the light guide plate and arranged in the groove. Due to the shielding structure, the light cannot directly emit on an optical membrane from the gap between the middle frame and the light guide plate, the problem of light leakage is resolved, bright lines and light spots cannot appear on a liquid crystal display panel, and accordingly the quality of the liquid crystal device is improved.

Description

technical field [0001] The invention belongs to the field of liquid crystal display, and more specifically relates to a backlight module and a liquid crystal display device using the backlight module. Background technique [0002] Liquid crystal display devices have been widely used in recent years due to their advantages of low power consumption, low manufacturing cost and no radiation. Such as figure 1 As shown, the liquid crystal display device mainly includes a backlight module 1 and a liquid crystal display panel 2. Here, the backlight module 1 is a side-light backlight module of a bottom-illuminated type, which is an important idea for designing a narrow-frame liquid crystal display device. , which can achieve a frame design with a minimum length of 4.3mm. Due to the thermal expansion and contraction of the light guide plate 11 during operation, and the manufacturing tolerance of the light guide plate 11, there will be a certain gap between the end surface of the ligh...

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Problems solved by technology

like figure 1 As shown, the liquid crystal display device mainly includes a backlight module 1 and a liquid crystal display panel 2. Here, the backlight module 1 is a side-light backlight module of a bottom-illuminated type, which is an important idea for designing a narrow-frame liquid crystal display device. , which can achieve a frame design with a minimum length of 4.3mm. Due to the thermal expansion and contraction of the light guide plate 11 during operation, and the manufacturing tolerance of the light guide plate 11, there will be a certain gap between the end surface of the light guide plate 11 and the middle frame 12. Assembling the gap, this will cause the problem of light leakage. The light from the light source 3 is directly emitted from the above-mentioned gap. Since the light is very bright, it will form a bright line at the frame of the liquid crystal display panel 2 after passing through the optical film 13. When the light leakage is serious, there will be May form local light spots, resulting in a decline in the quality of liquid crystal display devices

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