A backlight module, display device and control method thereof

Abstract

The embodiment of the invention discloses a backlight module, a display device and a control method thereof. The backlight module includes a stacked backplane, a first optical film layer, a light guide plate and a second optical film layer; the light guide plate includes opposite The first side and the second side; the first side is provided with a first roller and the third roller; the second side is provided with a second roller and a fourth roller; the backboard is provided with an opening; the first The optical film layer is provided with a first through hole; the second optical film layer is provided with a second through hole; in the display mode, the first optical film layer at the position of the first through hole is curled onto the first roller; the second through The second optical film layer at the position of the hole is curled onto the third roller; in the photographing mode, part of the first optical film layer is curled onto the second roller; part of the second optical film layer is curled onto the fourth roller; Vertical projections of the first through hole and the second through hole on the backplane overlap with the opening. The display device with the backlight module can have both full-screen display and front-facing camera functions.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a backlight module, a display device and a control method thereof. Background technique [0002] With the development of display technology, full-screen design has become an important development project. [0003] For multi-functional smart display devices such as mobile phones, the front camera area needs to be reserved at the top of the screen, and full display cannot be achieved. In the prior art, screen design schemes such as "Liu Haiping" and "Water Drop Screen" are often used to increase the screen ratio, but it is difficult for this scheme to truly achieve a full screen. In addition, although the existing slide-type camera design can hide the camera inside the mobile phone to achieve full-screen display, this solution significantly increases the thickness of the mobile phone, and also has the disadvantages of easy dust accumulation and high cos...

AI Technical Summary

Problems solved by technology

[0003] For multi-functional smart display devices such as mobile phones, the front camera area needs to be reserved at the top of the screen, which cannot achieve full display

In the existing technology, screen design schemes such as "notch screen" and "water drop screen" are often used to increase the screen-to-body ratio, but it is difficult for this scheme to truly achieve a full screen

In addition, although the existing sliding camera design can hide the camera inside the mobile phone to achieve a full-screen display, this solution significantly increases the thickness of the mobile phone, and has the disadvantages of easy dust accumulation and high cost.

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