Backlight module

Abstract

The invention provides a backlight module which comprises a back plate (2), a light guide plate (4), a backlight source (6), a light shield (8) and a side reflecting piece (10). The light guide plate (4) is arranged inside the back plate (2). The backlight source (6) is arranged inside the back plate (2) and located on one side of the light guide plate (4). The light shield (8) is arranged between the backlight source (6) and the back plate (2). The side reflecting piece (10) is arranged between the light guide plate (4) and the backlight source (6). The backlight source (6) comprises an LED substrate (62) and a plurality of LED lamps (64) installed on the LED substrate (62). The side reflecting piece (10) has elasticity. The side reflecting piece (10) is provided with a plurality of openings (102) corresponding to the LED lamps (64). The LED lamps (64) are contained inside the openings (102) and provide a light source for the light guide plate (4).

Description

technical field [0001] The invention relates to the field of plane display, in particular to a backlight module. Background technique [0002] Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as mobile phones, personal digital assistants (PDAs), digital cameras, computer screens or laptop screens Wait. [0003] Most of the liquid crystal display devices currently on the market are backlight liquid crystal display devices, which include a housing, a liquid crystal panel disposed in the housing, and a backlight module disposed in the housing. The structure of a traditional liquid crystal panel consists of a color filter substrate (Color Filter), a thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate), and a liquid crystal layer (Liquid Crystal Layer) arranged between the two substrates. Its working principle is to control the rotation of the liquid cry...

AI Technical Summary

Problems solved by technology

[0005] However, although the LED substrate 14 and the driving circuit substrate 15 are not against the side plate 20b of the back plate 20, the LED substrate 14 and the driving circuit substrate 15 are all against the side plate 20b of the back plate 20 in the actual manufacturing process.

Since the light-shielding cover 16 is made of metal, the LED substrate 14 mainly dissipates heat through the light-shielding cover 16, and the light-shielding cover 16 is in close contact with the light guide plate 13, so that the light guide plate 13 is extremely easy to expand due to heat.

Therefore, when the LED substrate 14 and the driving circuit substrate 15 abut against the side plate 20b of the back plate 20, if the light guide plate 13 is heated and expanded, the light shielding cover 16 cannot be deformed accordingly, which will easily cause the light guide plate 13 to be squeezed. deformed or broken

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